╭─────────────╮ │scroll to top│ ╰─────────────╯ ╭ web.zig ──────────────────────────────────────────────────────╮ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ ╰───────────────────────────────────────────────────────────────╯
🬐 🬠 🬞🬂🬏 🬟 🬑 🬟 🬑 ╭e5771586..╮ e5771586.. see-em: 🬋🬋🬋 🬋🬋🬋 🬋 🬋 │files │ commits refs discuss issues new login 🬐 🬠 🬐 🬠 🬑 🬟 🬰 ╰──────────╯ (634) user
╭────╮ ╭ clone ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ╮ │http│ ssh │ │ ╰────╯ ╰ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ╯
.. embed/ event/ test/ ui/ command.zig diff3.zig event.zig find.zig fork.zig lib.zig main.zig main_wasm.zig markdown.zig patch.zig progress.zig push.zig search.zig search_commit.zig search_thread.zig serve.zig serve_common.zig serve_http.zig serve_ssh.zig serve_ssh_protocol.zig test.zig testnet.zig try.zig ui.zig ╭─────────────────────────────────╮ │web.zig │ ╰─────────────────────────────────╯
152 // POST routes can be scoped by any page, so they can redirect using 153 // the base of the URL. this allows logging in to keep you on the page 154 // you were on. local mode has no accounts, so only the repo routes. 155 if (method == .POST) { 156 switch (host) { 157 .server => |server| { 158 // "repo/new" and "user/new" come before "new", which would claim them 159 const PostRoute = enum { login, logout, @"repo/new", @"user/new", repo, new, edit, remove, open, close, resolve, publish, merge, squash, attach, undo, clear }; 160 inline for (@typeInfo(PostRoute).@"enum".fields) |field| { 161 const suffix = "/" ++ field.name; 162 if (std.mem.endsWith(u8, path, suffix)) { 163 const base = path[0 .. path.len - suffix.len]; 164 return switch (@field(PostRoute, field.name)) { 165 .login => handleLogin(io, request, allocator, base, server.admin_repo_path, server.session_store), 166 .logout => handleLogout(request, base, server.session_store), 167 .@"repo/new" => handleRepoNew(io, request, allocator, path, server.admin_repo_path, server.users_dir, server.session_store), 168 .@"user/new" => handleUserNew(io, request, allocator, path, server.admin_repo_path, server.users_dir, server.session_store), 169 .repo => handleRepoSettings(io, request, allocator, path, base, host), 170 .new => handleNew(io, request, allocator, base, host), 171 .edit => handleEdit(io, request, allocator, base, host), 172 .remove => handleRemove(io, request, allocator, base, host), 173 .open => handleThreadStatus(io, request, allocator, base, host, true), 174 .close => handleThreadStatus(io, request, allocator, base, host, false), 175 .resolve => handleThreadResolve(io, request, allocator, base, host), 176 .publish => handlePatchPublish(io, request, allocator, base, host), 177 .merge => handlePatchMerge(io, request, allocator, base, host, .source), 178 .squash => handlePatchMerge(io, request, allocator, base, host, .squash), 179 .undo => handleUndo(io, request, allocator, base, host, .undo), 180 .clear => handleUndo(io, request, allocator, base, host, .clear), 181 .attach => handleAttach(io, request, allocator, base, host), 182 }; 183 } 184 } 185 }, 186 .local => |local| { 187 const PostRoute = enum { new, edit, remove, open, close, resolve, sync, attach, undo, clear }; 188 inline for (@typeInfo(PostRoute).@"enum".fields) |field| { 189 const suffix = "/" ++ field.name; 190 if (std.mem.endsWith(u8, path, suffix)) { 191 const base = path[0 .. path.len - suffix.len]; 192 return switch (@field(PostRoute, field.name)) { 193 .new => handleNew(io, request, allocator, base, host), 194 .edit => handleEdit(io, request, allocator, base, host), 195 .remove => handleRemove(io, request, allocator, base, host), 196 .open => handleThreadStatus(io, request, allocator, base, host, true), 197 .close => handleThreadStatus(io, request, allocator, base, host, false), 198 .resolve => handleThreadResolve(io, request, allocator, base, host), 199 .sync => handleSync(io, request, allocator, base, local), 200 .undo => handleUndo(io, request, allocator, base, host, .undo), 201 .clear => handleUndo(io, request, allocator, base, host, .clear), 202 .attach => handleAttach(io, request, allocator, base, host), 203 }; 204 } 205 } 206 }, 207 } 208 } 209 210 const get_or_head = method == .GET or method == .HEAD; 211 if (!get_or_head) { 212 try request.respond("method not allowed", .{ 213 .status = .method_not_allowed, 214 .extra_headers = &.{.{ .name = "content-type", .value = "text/plain" }}, 215 }); 216 return; 217 } 218 219 if (std.mem.eql(u8, path, "/favicon.ico")) { 220 try request.respond("", .{ 221 .status = .no_content, 222 .extra_headers = &.{.{ .name = "content-type", .value = "image/x-icon" }}, 223 }); 224 return; 225 } 226 227 // an attachment serves raw bytes rather than a page, so it is matched 228 // before the routable pages 229 if (attachmentRequest(path)) |attachment| return serveAttachment(io, request, allocator, attachment, host); 230 231 // embeds are matched before the pages so an embed's name never reads as a user 232 if (findEmbed(path)) |embed| { 233 // the embeds change with every build, so the browser must revalidate 234 // rather than heuristically cache them across server restarts 235 try request.respond(embed.body, .{ 236 .extra_headers = &.{ 237 .{ .name = "content-type", .value = embed.content_type }, 238 .{ .name = "cache-control", .value = "no-cache" }, 239 }, 240 }); 241 return; 242 } 243 { 244 // a path that's neither a page nor an embed gets the not-found page 245 const current_page = routeFromUrl(host, path) orelse .not_found; 246 // resolve the haxy_session cookie's token to a user_id via the 247 // store. user_id_buf lives on the stack for the rest of handleRequest, 248 // which is plenty for renderIndexHtml to consume. local mode has no 249 // accounts, so it is always logged out. 250 var user_id_buf: [evt.event_id_size]u8 = undefined; 251 var user_id: ?[]const u8 = null; 252 // the session token that named the user, so a stale one can be revoked 253 var token_buf: [SessionStore.token_hex_len]u8 = undefined; 254 var session_token: ?[]const u8 = null; 255 var form_arena = std.heap.ArenaAllocator.init(allocator); 256 defer form_arena.deinit(); 257 var form_feedback: ?ui.Session.FormFeedback = null; 258 var form_cookie_seen = false; 259 var local_flash_seen = false; 260 var sync_failure: ?[]const u8 = null; 261 var sync_failure_allocated: ?[]u8 = null; 262 defer if (sync_failure_allocated) |value| allocator.free(value); 263 // backs the cookie a claimed auto-login sets 264 var cookie_buf: [256]u8 = undefined; 265 var session_cookie: ?[]const u8 = null; 266 switch (host) { 267 .server => |server| { 268 user_id = blk: { 269 const token = getCookieValue(request, cookie_name) orelse break :blk null; 270 if (!server.session_store.lookup(token, &user_id_buf)) break :blk null; 271 session_token = token; 272 break :blk user_id_buf[0..evt.event_id_size]; 273 }; 274 // whoever seeded the store may have left a session to claim 275 if (user_id == null) { 276 if (server.session_store.autoLogin(&token_buf) and server.session_store.lookup(&token_buf, &user_id_buf)) { 277 session_cookie = try std.fmt.bufPrint(&cookie_buf, session_cookie_fmt, .{token_buf}); 278 session_token = &token_buf; 279 user_id = user_id_buf[0..evt.event_id_size]; 280 } 281 } 282 if (getCookieValue(request, form_flash_cookie)) |token| { 283 form_cookie_seen = true; 284 form_feedback = server.session_store.takeFlash(form_arena.allocator(), token); 285 } 286 }, 287 .local => { 288 if (getCookieValue(request, local_flash_cookie)) |raw| { 289 local_flash_seen = true; 290 if (std.mem.startsWith(u8, raw, local_required_title_prefix)) { 291 const tag = std.meta.stringToEnum(std.meta.Tag(ui.Session.FormFeedback), raw[local_required_title_prefix.len..]); 292 form_feedback = if (tag) |feedback_tag| switch (feedback_tag) { 293 .issue => .{ .issue = .{ .failure = .required_title } }, 294 .patch => .{ .patch = .{ .failure = .required_title } }, 295 .discussion => .{ .discussion = .{ .failure = .required_title } }, 296 else => null, 297 } else null; 298 } else if (std.mem.startsWith(u8, raw, local_sync_failure_prefix)) { 299 const value = try allocator.dupe(u8, raw[local_sync_failure_prefix.len..]); 300 sync_failure_allocated = value; 301 sync_failure = std.Uri.percentDecodeInPlace(value); 302 } 303 } 304 }, 305 } 306 307 const git_http_port: ?u16, const git_ssh_port: ?u16, const git_ssh_prefix: []const u8 = switch (host) { 308 .server => |server| .{ server.git_http_port, server.git_ssh_port, server.git_ssh_prefix }, 309 .local => .{ null, null, "" }, 310 }; 311 var session_data: ui.Session.Data = .{ 312 .user_id = user_id, 313 .form_feedback = form_feedback, 314 .sync_failure = sync_failure, 315 .current_page = current_page, 316 .host_kind = std.meta.activeTag(host), 317 .git_http_port = git_http_port, 318 .git_ssh_port = git_ssh_port, 319 .git_ssh_prefix = git_ssh_prefix, 320 }; 321 // a page that can't be built shows the not-found page instead 322 const html = renderIndexHtml(io, allocator, host, session_token, session_data) catch |err| switch (err) { 323 error.NotFound => blk: { 324 session_data.current_page = .not_found; 325 break :blk try renderIndexHtml(io, allocator, host, session_token, session_data); 326 }, 327 else => |e| return e, 328 }; 329 defer allocator.free(html); 330 331 const expired_form_cookie = if (form_cookie_seen) 332 try std.fmt.allocPrint(allocator, form_flash_cookie ++ "=; Path={s}; Max-Age=0", .{path}) 333 else 334 null; 335 defer if (expired_form_cookie) |cookie| allocator.free(cookie); 336 var header_buf: [4]std.http.Header = undefined; 337 var headers: std.ArrayList(std.http.Header) = .initBuffer(&header_buf); 338 headers.appendAssumeCapacity(.{ .name = "content-type", .value = "text/html; charset=utf-8" }); 339 if (expired_form_cookie) |cookie| headers.appendAssumeCapacity(.{ .name = "set-cookie", .value = cookie }); 340 if (local_flash_seen) headers.appendAssumeCapacity(.{ .name = "set-cookie", .value = local_flash_cookie ++ "=; Path=/; Max-Age=0" }); 341 if (session_cookie) |cookie| headers.appendAssumeCapacity(.{ .name = "set-cookie", .value = cookie }); 342 try request.respond(html, .{ 343 .status = if (session_data.current_page == .not_found) .not_found else .ok, 344 .extra_headers = headers.items, 345 }); 346 } 347 } 348 349 fn handleLogin( 350 io: std.Io, 351 request: *std.http.Server.Request, 352 allocator: std.mem.Allocator, 353 base: []const u8, 354 admin_repo_path: []const u8, 355 session_store: SessionStore, 356 ) !void { 357 const body = try readFormBody(request, allocator); 358 defer allocator.free(body); 359 360 const username = (try parseFormField(allocator, body, "username")) orelse try allocator.dupe(u8, ""); 361 defer allocator.free(username); 362 const password = (try parseFormField(allocator, body, "password")) orelse try allocator.dupe(u8, ""); 363 defer allocator.free(password); 364 365 const Repo = rp.Repo(.xit, evt.admin_repo_opts); 366 var repo = try Repo.open(io, allocator, .{ .path = admin_repo_path }); 367 defer repo.deinit(io, allocator); 368 369 var arena = std.heap.ArenaAllocator.init(allocator); 370 defer arena.deinit(); 371 372 const haxy_moment = try evt.currentMoment(evt.admin_repo_opts, &repo); 373 const result = try evt.User.verifyCredentials(evt.AdminDB, evt.admin_repo_opts.hash, haxy_moment, &arena, username, password); 374 375 // on success, return to the page the login came from (base, or "/" at the 376 // root); on failure, stay on its user tab to surface the error. 377 const success_location: []const u8 = if (base.len == 0) "/" else base; 378 const failure_location = try std.fmt.allocPrint(arena.allocator(), "{s}/user", .{base}); 379 380 switch (result) { 381 .success => |user_id| { 382 const token = try session_store.create(&user_id); 383 var cookie_buf: [256]u8 = undefined; 384 const cookie = try std.fmt.bufPrint(&cookie_buf, session_cookie_fmt, .{token}); 385 try request.respond("", .{ 386 .status = .see_other, 387 .extra_headers = &.{ 388 .{ .name = "location", .value = success_location }, 389 .{ .name = "set-cookie", .value = cookie }, 390 }, 391 }); 392 }, 393 .unknown_user => try respondFormFailure(request, allocator, session_store, failure_location, .{ .login = .{ .failure = .unknown_user, .username = username } }), 394 .wrong_password => try respondFormFailure(request, allocator, session_store, failure_location, .{ .login = .{ .failure = .wrong_password, .username = username } }), 395 } 396 } 397 398 fn respondFormFailure(request: *std.http.Server.Request, allocator: std.mem.Allocator, session_store: SessionStore, location: []const u8, feedback: ui.Session.FormFeedback) !void { 399 const token = try session_store.createFlash(allocator, feedback); 400 const cookie = try std.fmt.allocPrint(allocator, form_flash_cookie ++ "={s}; Path={s}; HttpOnly; SameSite=Strict", .{ token, location }); 401 defer allocator.free(cookie); 402 try request.respond("", .{ 403 .status = .see_other, 404 .extra_headers = &.{ 405 .{ .name = "location", .value = location }, 406 .{ .name = "set-cookie", .value = cookie }, 407 }, 408 }); 409 } 410 411 fn respondThreadFormFailure(request: *std.http.Server.Request, allocator: std.mem.Allocator, host: Host, location: []const u8, feedback: ui.Session.FormFeedback) !void { 412 return switch (host) { 413 .server => |server| respondFormFailure(request, allocator, server.session_store, location, feedback), 414 .local => { 415 const tag = std.meta.activeTag(feedback); 416 const required_title = switch (feedback) { 417 .issue => |value| value.failure == .required_title, 418 .discussion => |value| value.failure == .required_title, 419 .patch => |value| value.failure == .required_title, 420 else => false, 421 }; 422 if (!required_title) return error.InvalidFormFeedback; 423 const cookie = try std.fmt.allocPrint(allocator, local_flash_cookie ++ "=" ++ local_required_title_prefix ++ "{s}; Path=/; HttpOnly; SameSite=Strict", .{@tagName(tag)}); 424 defer allocator.free(cookie); 425 try request.respond("", .{ 426 .status = .see_other, 427 .extra_headers = &.{ 428 .{ .name = "location", .value = location }, 429 .{ .name = "set-cookie", .value = cookie }, 430 }, 431 }); 432 }, 433 }; 434 } 435 436 fn requiredTitleFeedback(kind: evt.EventKind, title: []const u8, labels: []const u8, description: []const u8, target_branch: []const u8, source_branch: ?[]const u8) ui.Session.FormFeedback { 437 return switch (kind) { 438 .issue => .{ .issue = .{ .failure = .required_title, .fields = .{ 439 .title = title, 440 .labels = labels, 441 .description = description, 442 } } }, 443 .patch => patchFeedback(.required_title, title, labels, description, target_branch, source_branch), 444 .discuss => .{ .discussion = .{ .failure = .required_title, .fields = .{ 445 .title = title, 446 .labels = labels, 447 .description = description, 448 } } }, 449 else => unreachable, 450 }; 451 } 452 453 fn patchFeedback(failure: ui.Session.FormFeedback.PatchFailure, title: []const u8, labels: []const u8, description: []const u8, target_branch: []const u8, source_branch: ?[]const u8) ui.Session.FormFeedback { 454 return .{ .patch = .{ .failure = failure, .fields = .{ 455 .title = title, 456 .labels = labels, 457 .description = description, 458 .target_branch = target_branch, 459 .source_branch = source_branch orelse "", 460 .source_kind = if (source_branch != null) .branch else .fork, 461 } } }; 462 } 463 464 fn handleLogout(request: *std.http.Server.Request, base: []const u8, session_store: SessionStore) !void { 465 // revoke the session server-side so the cookie is dead for anyone holding 466 // a copy, not just this browser. 467 if (getCookieValue(request, cookie_name)) |token| session_store.remove(token); 468 // return to the page the logout came from (base, or "/" at the root). 469 const location: []const u8 = if (base.len == 0) "/" else base; 470 // close the connection instead of keeping it alive: we don't read the 471 // request body, and respond()'s keep-alive path would otherwise try to 472 // discard it — which asserts on a bodyless POST that carries no 473 // content-length, and would block on one with no framing at all. a logout 474 // is just a redirect, so the browser reconnects for the follow-up GET. 475 try request.respond("", .{ 476 .status = .see_other, 477 .keep_alive = false, 478 .extra_headers = &.{ 479 .{ .name = "location", .value = location }, 480 .{ .name = "set-cookie", .value = cookie_name ++ "=; Path=/; HttpOnly; SameSite=Strict; Max-Age=0" }, 481 }, 482 }); 483 } 484 485 // the actor for a write to the repo `repo_base` names with at least `min_role`, 486 // or null once the refusal has been sent. local mode always writes. 487 fn authorizeWrite( 488 io: std.Io, 489 allocator: std.mem.Allocator, 490 arena: *std.heap.ArenaAllocator, 491 request: *std.http.Server.Request, 492 host: Host, 493 repo_base: []const u8, 494 min_role: evt.Repo.Role, 495 ) !?ui.Actor { 496 const server = switch (host) { 497 .server => |server| server, 498 .local => |src| return .{ .author = try ui.localAuthor(src, io, allocator, arena), .role = .owner }, 499 }; 500 const authorization: ui.Authorization = blk: { 501 const user_id = requestUserId(request, server.session_store) orelse break :blk .login_required; 502 503 const identity = repoBaseIdentity(repo_base) orelse break :blk .repo_not_found; 504 505 var admin_repo = try rp.Repo(.xit, evt.admin_repo_opts).open(io, allocator, .{ .path = server.admin_repo_path }); 506 defer admin_repo.deinit(io, allocator); 507 const moment = try evt.currentMoment(evt.admin_repo_opts, &admin_repo); 508 break :blk try ui.authorizeUser(io, moment, arena, server.users_dir, user_id, identity, min_role); 509 }; 510 switch (authorization) { 511 .actor => |actor| return actor, 512 .login_required => try respondLoginRequired(request), 513 .repo_not_found => try respondRepoNotFound(request), 514 .forbidden => try respondForbidden(request), 515 } 516 return null; 517 } 518 519 // whether the request may read the repo `repo_base` names. local mode always 520 // may. 521 fn mayRead( 522 io: std.Io, 523 allocator: std.mem.Allocator, 524 request: *std.http.Server.Request, 525 host: Host, 526 repo_base: []const u8, 527 ) !bool { 528 const server = switch (host) { 529 .server => |server| server, 530 .local => return true, 531 }; 532 const identity = repoBaseIdentity(repo_base) orelse return false; 533 534 var admin_repo = try rp.Repo(.xit, evt.admin_repo_opts).open(io, allocator, .{ .path = server.admin_repo_path }); 535 defer admin_repo.deinit(io, allocator); 536 var arena = std.heap.ArenaAllocator.init(allocator); 537 defer arena.deinit(); 538 const moment = try evt.currentMoment(evt.admin_repo_opts, &admin_repo); 539 const user_id = blk: { 540 const id = requestUserId(request, server.session_store) orelse break :blk null; 541 break :blk if (try ui.activeUser(moment, &arena, id) != null) id else null; 542 }; 543 const owner_repo = evt.parseOwnerRepoPath(identity) orelse return false; 544 const repo = (try evt.readRepoByOwnerAndName(io, allocator, &arena, moment, server.users_dir, owner_repo.owner, owner_repo.name, user_id)) orelse return false; 545 return repo.role != .none; 546 } 547 548 // the logged-in user the request's session cookie names 549 fn requestUserId(request: *std.http.Server.Request, session_store: SessionStore) ?[evt.event_id_size]u8 { 550 const token = getCookieValue(request, cookie_name) orelse return null; 551 var user_id: [evt.event_id_size]u8 = undefined; 552 return if (session_store.lookup(token, &user_id)) user_id else null; 553 } 554 555 // refuse a write from a request with no logged-in user. the body goes unread, 556 // so the connection closes. 557 fn respondLoginRequired(request: *std.http.Server.Request) !void { 558 try request.respond("log in to make changes", .{ 559 .status = .forbidden, 560 .keep_alive = false, 561 .extra_headers = &.{.{ .name = "content-type", .value = "text/plain" }}, 562 }); 563 } 564 565 // refuse a write the user's role in the repo doesn't allow 566 fn respondForbidden(request: *std.http.Server.Request) !void { 567 try request.respond("you don't have permission to do that", .{ 568 .status = .forbidden, 569 .keep_alive = false, 570 .extra_headers = &.{.{ .name = "content-type", .value = "text/plain" }}, 571 }); 572 } 573 574 fn respondRepoNotFound(request: *std.http.Server.Request) !void { 575 try request.respond("repo not found", .{ 576 .status = .not_found, 577 .keep_alive = false, 578 .extra_headers = &.{.{ .name = "content-type", .value = "text/plain" }}, 579 }); 580 } 581 582 // new actions share a suffix; the base identifies whether the form creates a 583 // thread or comment. 584 fn handleNew( 585 io: std.Io, 586 request: *std.http.Server.Request, 587 allocator: std.mem.Allocator, 588 base: []const u8, 589 host: Host, 590 ) !void { 591 if (commentBaseParts(host, base) != null) return handleCommentNew(io, request, allocator, base, host); 592 593 const issues_suffix = "/issues"; 594 if (std.mem.endsWith(u8, base, issues_suffix)) 595 return handleThreadNew(io, request, allocator, base[0 .. base.len - issues_suffix.len], host, .issue); 596 const discussions_suffix = "/discussions"; 597 if (std.mem.endsWith(u8, base, discussions_suffix)) 598 return handleThreadNew(io, request, allocator, base[0 .. base.len - discussions_suffix.len], host, .discuss); 599 const patches_suffix = "/patches"; 600 if (std.mem.endsWith(u8, base, patches_suffix)) 601 return handleThreadNew(io, request, allocator, base[0 .. base.len - patches_suffix.len], host, .patch); 602 603 try request.respond("new event target not found", .{ 604 .status = .not_found, 605 .extra_headers = &.{.{ .name = "content-type", .value = "text/plain" }}, 606 }); 607 } 608 609 // create a repo for the logged-in user and redirect to it. a failure goes 610 // back to the new-repo page that posted the form. 611 fn handleRepoNew( 612 io: std.Io, 613 request: *std.http.Server.Request, 614 allocator: std.mem.Allocator, 615 form_location: []const u8, 616 admin_repo_path: []const u8, 617 users_dir: []const u8, 618 session_store: SessionStore, 619 ) !void { 620 const user_id = requestUserId(request, session_store) orelse return respondLoginRequired(request); 621 var arena = std.heap.ArenaAllocator.init(allocator); 622 defer arena.deinit(); 623 const user = blk: { 624 var admin_repo = try rp.Repo(.xit, evt.admin_repo_opts).open(io, allocator, .{ .path = admin_repo_path }); 625 defer admin_repo.deinit(io, allocator); 626 const moment = try evt.currentMoment(evt.admin_repo_opts, &admin_repo); 627 break :blk (try ui.activeUser(moment, &arena, user_id)) orelse return respondLoginRequired(request); 628 }; 629 630 const body = try readFormBody(request, allocator); 631 defer allocator.free(body); 632 const name = (try parseFormField(allocator, body, "name")) orelse try allocator.dupe(u8, ""); 633 defer allocator.free(name); 634 const description = (try parseFormField(allocator, body, "description")) orelse try allocator.dupe(u8, ""); 635 defer allocator.free(description); 636 const hash_value = (try parseFormField(allocator, body, "hash")) orelse try allocator.dupe(u8, ""); 637 defer allocator.free(hash_value); 638 const access_value = (try parseFormField(allocator, body, "access")) orelse try allocator.dupe(u8, ""); 639 defer allocator.free(access_value); 640 const bad_request: std.http.Server.Request.RespondOptions = .{ .status = .bad_request, .extra_headers = &.{.{ .name = "content-type", .value = "text/plain" }} }; 641 const hash_kind = std.meta.stringToEnum(hash.HashKind, hash_value) orelse return request.respond("invalid hash", bad_request); 642 const access = std.meta.stringToEnum(evt.Repo.Access, access_value) orelse return request.respond("invalid access", bad_request); 643 644 _ = evt.createRepo(io, allocator, users_dir, &user_id, .{ .name = user.event.name, .email = user.event.email }, name, description, access, hash_kind) catch |err| { 645 const failure = ui.Session.FormFeedback.RepoFailure.fromError(err) orelse return err; 646 return respondFormFailure(request, allocator, session_store, form_location, .{ .repo = .{ .failure = failure, .fields = .{ 647 .name = name, 648 .description = description, 649 .hash = hash_kind, 650 .access = access, 651 } } }); 652 }; 653 654 const location = try std.fmt.allocPrint(allocator, "/{s}:{s}", .{ user.event.name, name }); 655 defer allocator.free(location); 656 try request.respond("", .{ 657 .status = .see_other, 658 .extra_headers = &.{.{ .name = "location", .value = location }}, 659 }); 660 } 661 662 // change the repo `repo_base` names as its owner, then redirect to its 663 // settings under its new name. a failure goes back to the settings page. 664 fn handleRepoSettings( 665 io: std.Io, 666 request: *std.http.Server.Request, 667 allocator: std.mem.Allocator, 668 form_location: []const u8, 669 repo_base: []const u8, 670 host: Host, 671 ) !void { 672 const server = switch (host) { 673 .server => |server| server, 674 .local => return respondRepoNotFound(request), 675 }; 676 var arena = std.heap.ArenaAllocator.init(allocator); 677 defer arena.deinit(); 678 const actor = (try authorizeWrite(io, allocator, &arena, request, host, repo_base, .owner)) orelse return; 679 680 const body = try readFormBody(request, allocator); 681 defer allocator.free(body); 682 const name = (try parseFormField(allocator, body, "name")) orelse try allocator.dupe(u8, ""); 683 defer allocator.free(name); 684 const description = (try parseFormField(allocator, body, "description")) orelse try allocator.dupe(u8, ""); 685 defer allocator.free(description); 686 const access_value = (try parseFormField(allocator, body, "access")) orelse try allocator.dupe(u8, ""); 687 defer allocator.free(access_value); 688 const access = std.meta.stringToEnum(evt.Repo.Access, access_value) orelse return request.respond("invalid access", .{ .status = .bad_request, .extra_headers = &.{.{ .name = "content-type", .value = "text/plain" }} }); 689 690 // authorizeWrite refused any other base 691 const identity = repoBaseIdentity(repo_base) orelse unreachable; 692 const route = ui.Repo.Settings.update(io, allocator, server.users_dir, actor, identity, name, description, access) catch |err| switch (err) { 693 error.NotFound => return respondRepoNotFound(request), 694 else => { 695 const failure = ui.Session.FormFeedback.RepoFailure.fromError(err) orelse return err; 696 return respondFormFailure(request, allocator, server.session_store, form_location, .{ .repo_settings = .{ .failure = failure, .fields = .{ 697 .name = name, 698 .description = description, 699 .access = access, 700 } } }); 701 }, 702 }; 703 704 try request.respond("", .{ 705 .status = .see_other, 706 .extra_headers = &.{.{ .name = "location", .value = try route.toUrl(&arena) }}, 707 }); 708 } 709 710 // create a user, log them in, and redirect to their page. a failure goes 711 // back to the new-user page that posted the form. 712 fn handleUserNew( 713 io: std.Io, 714 request: *std.http.Server.Request, 715 allocator: std.mem.Allocator, 716 form_location: []const u8, 717 admin_repo_path: []const u8, 718 users_dir: []const u8, 719 session_store: SessionStore, 720 ) !void { 721 if (requestUserId(request, session_store) != null) { 722 return request.respond("log out to create a user", .{ 723 .status = .forbidden, 724 .keep_alive = false, 725 .extra_headers = &.{.{ .name = "content-type", .value = "text/plain" }}, 726 }); 727 } 728 729 const body = try readFormBody(request, allocator); 730 defer allocator.free(body); 731 const name = (try parseFormField(allocator, body, "name")) orelse try allocator.dupe(u8, ""); 732 defer allocator.free(name); 733 const email = (try parseFormField(allocator, body, "email")) orelse try allocator.dupe(u8, ""); 734 defer allocator.free(email); 735 const password = (try parseFormField(allocator, body, "password")) orelse try allocator.dupe(u8, ""); 736 defer allocator.free(password); 737 const password_again = (try parseFormField(allocator, body, "password_again")) orelse try allocator.dupe(u8, ""); 738 defer allocator.free(password_again); 739 740 const user_id = blk: { 741 var admin_repo = try rp.Repo(.xit, evt.admin_repo_opts).open(io, allocator, .{ .path = admin_repo_path }); 742 defer admin_repo.deinit(io, allocator); 743 break :blk evt.createUser(io, allocator, users_dir, &admin_repo, name, email, password, password_again) catch |err| { 744 const failure = ui.Session.FormFeedback.UserFailure.fromError(err) orelse return err; 745 return respondFormFailure(request, allocator, session_store, form_location, .{ .user = .{ .failure = failure, .fields = .{ .name = name, .email = email } } }); 746 }; 747 }; 748 749 const token = try session_store.create(&user_id); 750 var cookie_buf: [256]u8 = undefined; 751 const cookie = try std.fmt.bufPrint(&cookie_buf, session_cookie_fmt, .{token}); 752 const location = try std.fmt.allocPrint(allocator, "/{s}", .{name}); 753 defer allocator.free(location); 754 try request.respond("", .{ 755 .status = .see_other, 756 .extra_headers = &.{ 757 .{ .name = "location", .value = location }, 758 .{ .name = "set-cookie", .value = cookie }, 759 }, 760 }); 761 } 762 763 // create a thread in the repo the form's page names and redirect to it. 764 fn handleThreadNew( 765 io: std.Io, 766 request: *std.http.Server.Request, 767 allocator: std.mem.Allocator, 768 base: []const u8, 769 host: Host, 770 kind: evt.EventKind, 771 ) !void { 772 var author_arena = std.heap.ArenaAllocator.init(allocator); 773 defer author_arena.deinit(); 774 const actor = (try authorizeWrite(io, allocator, &author_arena, request, host, base, .read)) orelse return; 775 const author = actor.author; 776 const body = try readFormBody(request, allocator); 777 defer allocator.free(body); 778 779 const title = (try parseFormField(allocator, body, "title")) orelse try allocator.dupe(u8, ""); 780 defer allocator.free(title); 781 const labels = (try parseFormField(allocator, body, "labels")) orelse try allocator.dupe(u8, ""); 782 defer allocator.free(labels); 783 const description_crlf = (try parseFormField(allocator, body, "description")) orelse try allocator.dupe(u8, ""); 784 defer allocator.free(description_crlf); 785 // form submission normalizes textarea line breaks to CRLF; store plain 786 // newlines so the text renders the same on every host 787 const description = try std.mem.replaceOwned(u8, allocator, description_crlf, "\r\n", "\n"); 788 defer allocator.free(description); 789 const target_branch = (try parseFormField(allocator, body, "target_branch")) orelse try allocator.dupe(u8, ""); 790 defer allocator.free(target_branch); 791 792 const source_branch = if (kind == .patch) try parseFormField(allocator, body, "source_branch") else null; 793 defer if (source_branch) |branch| allocator.free(branch); 794 795 const valid = switch (kind) { 796 .issue => evt.Issue.fieldsValid(title, labels), 797 .patch => evt.Patch.fieldsValid(title, labels), 798 .discuss => evt.Discussion.fieldsValid(title, labels), 799 else => unreachable, 800 }; 801 if (!valid) { 802 const list_name: []const u8 = switch (kind) { 803 .issue => "issues", 804 .patch => "patches", 805 .discuss => "discussions", 806 else => unreachable, 807 }; 808 const form_location = try std.fmt.allocPrint(allocator, "{s}/{s}/new", .{ base, list_name }); 809 defer allocator.free(form_location); 810 if (!evt.titleValid(title)) { 811 return respondThreadFormFailure(request, allocator, host, form_location, requiredTitleFeedback(kind, title, labels, description, target_branch, source_branch)); 812 } 813 try request.respond("", .{ 814 .status = .see_other, 815 .extra_headers = &.{.{ .name = "location", .value = form_location }}, 816 }); 817 return; 818 } 819 820 var id_bytes: [evt.event_id_size]u8 = undefined; 821 io.random(&id_bytes); 822 const event_id_hex = std.fmt.bytesToHex(id_bytes, .lower); 823 824 const not_found = "repo not found"; 825 const request_repo = (try requestRepoSource(io, allocator, host, base)) orelse { 826 try request.respond(not_found, .{ 827 .status = .not_found, 828 .extra_headers = &.{.{ .name = "content-type", .value = "text/plain" }}, 829 }); 830 return; 831 }; 832 defer request_repo.deinit(allocator); 833 const source = request_repo.source; 834 if (kind == .patch and source_branch == null) { 835 const server = switch (host) { 836 .server => |server| server, 837 .local => return respondRemoveNotFound(request), 838 }; 839 const user_id = actor.user_id orelse return respondLoginRequired(request); 840 if (!evt.Patch.branchValid(target_branch) or !try request_repo.source.hasBranch(io, allocator, target_branch)) { 841 const form_location = try std.fmt.allocPrint(allocator, "{s}/patches/new", .{base}); 842 defer allocator.free(form_location); 843 return respondThreadFormFailure(request, allocator, host, form_location, patchFeedback(.invalid_target_branch, title, labels, description, target_branch, null)); 844 } 845 const repo_id = evt.parseEventId(std.fs.path.basename(request_repo.source.path)) catch return respondRemoveNotFound(request); 846 const repo_user_id = actor.repo_user_id orelse unreachable; 847 const fork_path = try fork.create(.{}, io, allocator, server.users_dir, .{ 848 .id = event_id_hex, 849 .user_id = user_id, 850 .repo_id = repo_id, 851 .repo_user_id = repo_user_id, 852 .title = title, 853 .description = description, 854 .labels = labels, 855 .target_branch = target_branch, 856 .author = author, 857 .timestamp = @intCast(std.Io.Timestamp.now(io, .real).toSeconds()), 858 }); 859 defer allocator.free(fork_path); 860 } else { 861 const event = evt.EventWithId{ 862 .id = event_id_hex, 863 .timestamp = @intCast(std.Io.Timestamp.now(io, .real).toSeconds()), 864 .author = author, 865 .event = switch (kind) { 866 .issue => .{ .issue = .{ .title = title, .description = description, .labels = labels } }, 867 .patch => .{ .patch = .{ .title = title, .description = description, .labels = labels, .target_branch = target_branch, .source_branch = source_branch } }, 868 .discuss => .{ .discuss = .{ .title = title, .description = description, .labels = labels } }, 869 else => unreachable, 870 }, 871 }; 872 873 switch (source.repo_kind) { 874 inline else => |repo_kind| { 875 var any_repo = try rp.AnyRepo(repo_kind, .{}).open(io, allocator, source.localInitOpts()); 876 defer any_repo.deinit(io, allocator); 877 switch (any_repo) { 878 inline else => |*repo| { 879 const result = if (kind == .patch) 880 pch.writeBranchPatch(host.event(), repo_kind, repo.self_repo_opts, io, allocator, repo, event_id_hex, event.event.patch orelse unreachable, null, author) 881 else 882 evt.consume(host.event(), .repo, repo_kind, repo.self_repo_opts, io, allocator, repo, evt.events_ref, &.{event}); 883 result catch |err| { 884 if (kind != .patch) return err; 885 const failure = ui.Session.FormFeedback.PatchFailure.fromError(err) orelse return err; 886 const form_location = try std.fmt.allocPrint(allocator, "{s}/patches/new", .{base}); 887 defer allocator.free(form_location); 888 return respondThreadFormFailure(request, allocator, host, form_location, patchFeedback(failure, title, labels, description, target_branch, source_branch)); 889 }; 890 }, 891 } 892 }, 893 } 894 } 895 896 const location = try std.fmt.allocPrint(allocator, "{s}/{s}:{s}", .{ base, @tagName(kind), &event_id_hex }); 897 defer allocator.free(location); 898 try request.respond("", .{ 899 .status = .see_other, 900 .extra_headers = &.{.{ .name = "location", .value = location }}, 901 }); 902 } 903 904 const CommentBaseParts = struct { 905 repo_base: []const u8, 906 thread_kind: evt.EventKind, 907 thread_id: [evt.event_id_size]u8, 908 comment_id: ?[evt.event_id_size]u8, 909 }; 910 911 fn commentBaseParts(host: Host, base: []const u8) ?CommentBaseParts { 912 const route = routeFromUrl(host, base) orelse return null; 913 const identity, const thread_kind, const thread_hex, const comment_hex = switch (route) { 914 .repo_issues => |*issue| .{ issue.name.slice(), evt.EventKind.issue, issue.selected.slice(), issue.comment.slice() }, 915 .repo_patches => |*patch| .{ patch.name.slice(), evt.EventKind.patch, patch.selected.slice(), patch.comment.slice() }, 916 .repo_discussions => |*discussion| .{ discussion.name.slice(), evt.EventKind.discuss, discussion.selected.slice(), discussion.comment.slice() }, 917 else => return null, 918 }; 919 const thread_id = evt.parseEventId(thread_hex) catch return null; 920 const comment_id = if (comment_hex.len == 0) null else evt.parseEventId(comment_hex) catch return null; 921 const repo_base_len = if (identity.len == 0) 0 else "/".len + identity.len; 922 return .{ .repo_base = base[0..repo_base_len], .thread_kind = thread_kind, .thread_id = thread_id, .comment_id = comment_id }; 923 } 924 925 fn handlePatchPublish( 926 io: std.Io, 927 request: *std.http.Server.Request, 928 allocator: std.mem.Allocator, 929 base: []const u8, 930 host: Host, 931 ) !void { 932 const parts = commentBaseParts(host, base) orelse return respondRemoveNotFound(request); 933 if (parts.thread_kind != .patch or parts.comment_id != null) return respondRemoveNotFound(request); 934 const server = switch (host) { 935 .server => |server| server, 936 .local => return respondRemoveNotFound(request), 937 }; 938 var author_arena = std.heap.ArenaAllocator.init(allocator); 939 defer author_arena.deinit(); 940 // only the draft's author may publish it, which publish checks 941 const actor = (try authorizeWrite(io, allocator, &author_arena, request, host, parts.repo_base, .read)) orelse return; 942 const user_id = actor.user_id orelse return respondLoginRequired(request); 943 const author = actor.author; 944 945 const request_repo = (try requestRepoSource(io, allocator, host, parts.repo_base)) orelse return respondRemoveNotFound(request); 946 defer request_repo.deinit(allocator); 947 const repo_id = evt.parseEventId(std.fs.path.basename(request_repo.source.path)) catch return respondRemoveNotFound(request); 948 var target_repo = try rp.AnyRepo(.xit, .{}).open(io, allocator, request_repo.source.localInitOpts()); 949 defer target_repo.deinit(io, allocator); 950 var admin_repo = try rp.Repo(.xit, evt.admin_repo_opts).open(io, allocator, .{ .path = server.admin_repo_path }); 951 defer admin_repo.deinit(io, allocator); 952 const id = std.fmt.bytesToHex(parts.thread_id, .lower); 953 switch (target_repo) { 954 inline else => |*repo| try pch.publish(repo.self_repo_opts, io, allocator, server.users_dir, &admin_repo, repo, .{ 955 .id = id, 956 .user_id = user_id, 957 .repo_id = repo_id, 958 .author = author, 959 .timestamp = @intCast(std.Io.Timestamp.now(io, .real).toSeconds()), 960 }), 961 } 962 try request.respond("", .{ 963 .status = .see_other, 964 .extra_headers = &.{.{ .name = "location", .value = base }}, 965 }); 966 } 967 968 fn handlePatchMerge( 969 io: std.Io, 970 request: *std.http.Server.Request, 971 allocator: std.mem.Allocator, 972 base: []const u8, 973 host: Host, 974 revision: evt.Patch.MergeRevision, 975 ) !void { 976 const parts = commentBaseParts(host, base) orelse return respondRemoveNotFound(request); 977 if (parts.thread_kind != .patch or parts.comment_id != null) return respondRemoveNotFound(request); 978 const server = switch (host) { 979 .server => |server| server, 980 .local => return respondRemoveNotFound(request), 981 }; 982 var author_arena = std.heap.ArenaAllocator.init(allocator); 983 defer author_arena.deinit(); 984 const author = ((try authorizeWrite(io, allocator, &author_arena, request, host, parts.repo_base, .write)) orelse return).author; 985 986 const request_repo = (try requestRepoSource(io, allocator, host, parts.repo_base)) orelse return respondRemoveNotFound(request); 987 defer request_repo.deinit(allocator); 988 var target_repo = try rp.AnyRepo(.xit, .{}).open(io, allocator, request_repo.source.localInitOpts()); 989 defer target_repo.deinit(io, allocator); 990 991 const id = std.fmt.bytesToHex(parts.thread_id, .lower); 992 const merged = switch (target_repo) { 993 inline else => |*repo| pch.mergeAndRemoveFork(repo.self_repo_opts, io, allocator, server.users_dir, repo, .{ 994 .id = id, 995 .revision = revision, 996 .author = author, 997 .timestamp = @intCast(std.Io.Timestamp.now(io, .real).toSeconds()), 998 }), 999 }; 1000 merged catch |err| switch (err) { 1001 error.MergeConflict => return request.respond("merge conflict", .{ 1002 .status = .conflict, 1003 .keep_alive = false, 1004 .extra_headers = &.{.{ .name = "content-type", .value = "text/plain" }}, 1005 }), 1006 error.MergeCheckUnavailable, error.PatchOutOfDate, error.PatchDataUnavailable => {}, 1007 else => return err, 1008 }; 1009 1010 const location = try std.fmt.allocPrint(allocator, "{s}/patch:{s}", .{ parts.repo_base, &id }); 1011 defer allocator.free(location); 1012 try request.respond("", .{ 1013 .status = .see_other, 1014 .keep_alive = false, 1015 .extra_headers = &.{.{ .name = "location", .value = location }}, 1016 }); 1017 } 1018 1019 // create a reply and redirect to its permalink. 1020 fn handleCommentNew( 1021 io: std.Io, 1022 request: *std.http.Server.Request, 1023 allocator: std.mem.Allocator, 1024 base: []const u8, 1025 host: Host, 1026 ) !void { 1027 const not_found = "comment parent not found"; 1028 const parts = commentBaseParts(host, base) orelse { 1029 try request.respond(not_found, .{ 1030 .status = .not_found, 1031 .extra_headers = &.{.{ .name = "content-type", .value = "text/plain" }}, 1032 }); 1033 return; 1034 }; 1035 1036 var author_arena = std.heap.ArenaAllocator.init(allocator); 1037 defer author_arena.deinit(); 1038 const author = ((try authorizeWrite(io, allocator, &author_arena, request, host, parts.repo_base, .read)) orelse return).author; 1039 1040 const form_body = try readFormBody(request, allocator); 1041 defer allocator.free(form_body); 1042 const body_crlf = (try parseFormField(allocator, form_body, "body")) orelse try allocator.dupe(u8, ""); 1043 defer allocator.free(body_crlf); 1044 const body = try std.mem.replaceOwned(u8, allocator, body_crlf, "\r\n", "\n"); 1045 defer allocator.free(body); 1046 1047 if (!evt.Comment.fieldsValid(body)) { 1048 const form_location = try std.fmt.allocPrint(allocator, "{s}/new", .{base}); 1049 defer allocator.free(form_location); 1050 try request.respond("", .{ 1051 .status = .see_other, 1052 .extra_headers = &.{.{ .name = "location", .value = form_location }}, 1053 }); 1054 return; 1055 } 1056 1057 const thread_id_hex = std.fmt.bytesToHex(parts.thread_id, .lower); 1058 const parent_id_hex = std.fmt.bytesToHex(parts.comment_id orelse parts.thread_id, .lower); 1059 1060 const request_repo = (try requestRepoSource(io, allocator, host, parts.repo_base)) orelse { 1061 try request.respond(not_found, .{ 1062 .status = .not_found, 1063 .extra_headers = &.{.{ .name = "content-type", .value = "text/plain" }}, 1064 }); 1065 return; 1066 }; 1067 defer request_repo.deinit(allocator); 1068 const source = request_repo.source; 1069 var event_id_hex: [evt.event_id_size * 2]u8 = undefined; 1070 switch (source.repo_kind) { 1071 inline else => |repo_kind| { 1072 var any_repo = try rp.AnyRepo(repo_kind, .{}).open(io, allocator, source.localInitOpts()); 1073 defer any_repo.deinit(io, allocator); 1074 switch (any_repo) { 1075 inline else => |*repo| event_id_hex = try evt.Comment.create(host.event(), repo_kind, repo.self_repo_opts, io, allocator, repo, &thread_id_hex, &parent_id_hex, body, author), 1076 } 1077 }, 1078 } 1079 1080 const location = try std.fmt.allocPrint(allocator, "{s}/{s}:{s}/comment:{s}", .{ parts.repo_base, @tagName(parts.thread_kind), &thread_id_hex, &event_id_hex }); 1081 defer allocator.free(location); 1082 try request.respond("", .{ 1083 .status = .see_other, 1084 .extra_headers = &.{.{ .name = "location", .value = location }}, 1085 }); 1086 } 1087 1088 const AttachmentRequest = struct { 1089 repo_base: []const u8, 1090 id: [evt.event_id_size]u8, 1091 }; 1092 1093 // an attachment url is its repo's base and the attachment's event id 1094 fn attachmentRequest(path: []const u8) ?AttachmentRequest { 1095 const infix = "/attachment:"; 1096 const at = std.mem.lastIndexOf(u8, path, infix) orelse return null; 1097 const tail = path[at + infix.len ..]; 1098 const id = evt.parseEventId(tail) catch return null; 1099 return .{ .repo_base = path[0..at], .id = id }; 1100 } 1101 1102 // serve an attachment's bytes from the repo its url names 1103 fn serveAttachment( 1104 io: std.Io, 1105 request: *std.http.Server.Request, 1106 allocator: std.mem.Allocator, 1107 attachment: AttachmentRequest, 1108 host: Host, 1109 ) !void { 1110 if (!try mayRead(io, allocator, request, host, attachment.repo_base)) return respondAttachmentNotFound(request); 1111 const request_repo = (try requestRepoSource(io, allocator, host, attachment.repo_base)) orelse return respondAttachmentNotFound(request); 1112 defer request_repo.deinit(allocator); 1113 const source = request_repo.source; 1114 switch (source.repo_kind) { 1115 inline else => |repo_kind| { 1116 var any_repo = try rp.AnyRepo(repo_kind, .{}).open(io, allocator, source.localInitOpts()); 1117 defer any_repo.deinit(io, allocator); 1118 switch (any_repo) { 1119 inline else => |*repo| try sendAttachment(repo_kind, repo.self_repo_opts, io, request, allocator, repo, &attachment.id), 1120 } 1121 }, 1122 } 1123 } 1124 1125 fn sendAttachment( 1126 comptime repo_kind: rp.RepoKind, 1127 comptime repo_opts: rp.RepoOpts(repo_kind), 1128 io: std.Io, 1129 request: *std.http.Server.Request, 1130 allocator: std.mem.Allocator, 1131 repo: *rp.Repo(repo_kind, repo_opts), 1132 id: *const [evt.event_id_size]u8, 1133 ) !void { 1134 var arena = std.heap.ArenaAllocator.init(allocator); 1135 defer arena.deinit(); 1136 1137 const DB = evt.EventDB(repo_opts.hash); 1138 var event_db_maybe: ?evt.LocalEventDB(repo_opts.hash) = if (repo_kind == .git) try evt.LocalEventDB(repo_opts.hash).openReadOnly(io, allocator, repo.core.repo_dir) else null; 1139 defer if (event_db_maybe) |*event_db| event_db.deinit(io, allocator); 1140 const haxy_moment = (if (event_db_maybe) |*event_db| 1141 evt.currentMomentFromDb(repo_opts.hash, event_db.db) 1142 else if (repo_kind == .git) 1143 return respondAttachmentNotFound(request) 1144 else 1145 evt.currentMoment(repo_opts, repo)) catch return respondAttachmentNotFound(request); 1146 1147 const record = (try evt.Attachment.readById(DB, repo_opts.hash, haxy_moment, &arena, id)) orelse return respondAttachmentNotFound(request); 1148 if (record.removed) return respondAttachmentNotFound(request); 1149 if (record.blob_oid.len != hash.hexLen(repo_opts.hash)) return respondAttachmentNotFound(request); 1150 const blob_oid: *const [hash.hexLen(repo_opts.hash)]u8 = @ptrCast(record.blob_oid.ptr); 1151 1152 var moment = repo.core.latestMoment() catch return respondAttachmentNotFound(request); 1153 const state = rp.Repo(repo_kind, repo_opts).State(.read_only){ .core = &repo.core, .extra = .{ .moment = &moment } }; 1154 var object_reader = obj.ObjectReader(repo_kind, repo_opts).init(state, io, allocator, blob_oid) catch return respondAttachmentNotFound(request); 1155 defer object_reader.deinit(); 1156 if (object_reader.header().kind != .blob) return respondAttachmentNotFound(request); 1157 1158 const content_type = attachmentContentType(record.name); 1159 const encoded_name = try ui.urlEncodeRef(allocator, record.name); 1160 defer allocator.free(encoded_name); 1161 const disposition = try std.fmt.allocPrint(allocator, "{s}; filename*=UTF-8''{s}", .{ if (content_type == null) "attachment" else "inline", encoded_name }); 1162 defer allocator.free(disposition); 1163 1164 var send_buf: [8192]u8 = undefined; 1165 var body = try request.respondStreaming(&send_buf, .{ 1166 .content_length = object_reader.header().size, 1167 .respond_options = .{ 1168 .extra_headers = &.{ 1169 .{ .name = "content-type", .value = content_type orelse "application/octet-stream" }, 1170 .{ .name = "content-disposition", .value = disposition }, 1171 // uploaded bytes are never sniffed into a type that could run 1172 // as script on this origin 1173 .{ .name = "x-content-type-options", .value = "nosniff" }, 1174 }, 1175 }, 1176 }); 1177 _ = try object_reader.interface.streamRemaining(&body.writer); 1178 try body.end(); 1179 } 1180 1181 // the images a browser renders safely inline. anything else downloads as 1182 // opaque bytes, so an uploaded page can't run on this origin. 1183 fn attachmentContentType(name: []const u8) ?[]const u8 { 1184 const types = [_]struct { ext: []const u8, value: []const u8 }{ 1185 .{ .ext = ".png", .value = "image/png" }, 1186 .{ .ext = ".jpg", .value = "image/jpeg" }, 1187 .{ .ext = ".jpeg", .value = "image/jpeg" }, 1188 .{ .ext = ".gif", .value = "image/gif" }, 1189 .{ .ext = ".webp", .value = "image/webp" }, 1190 }; 1191 for (types) |entry| { 1192 if (name.len > entry.ext.len and std.ascii.eqlIgnoreCase(name[name.len - entry.ext.len ..], entry.ext)) return entry.value; 1193 } 1194 return null; 1195 } 1196 1197 fn respondAttachmentNotFound(request: *std.http.Server.Request) !void { 1198 try request.respond("attachment not found", .{ 1199 .status = .not_found, 1200 .extra_headers = &.{.{ .name = "content-type", .value = "text/plain" }}, 1201 }); 1202 } 1203 1204 fn respondAttachmentParentNotFound(request: *std.http.Server.Request) !void { 1205 try request.respond("attachment parent not found", .{ 1206 .status = .not_found, 1207 .keep_alive = false, 1208 .extra_headers = &.{.{ .name = "content-type", .value = "text/plain" }}, 1209 }); 1210 } 1211 1212 // the upload declares its file's name here, since the body is the file itself 1213 const attachment_name_header = "x-attachment-name"; 1214 1215 const AttachParentParts = struct { 1216 repo_base: []const u8, 1217 kind: evt.EventKind, 1218 id_bytes: [evt.event_id_size]u8, 1219 }; 1220 1221 // what an attachment hangs off: the `<kind>:<id>` segment the form's page ends 1222 // with, whatever kind that is 1223 fn attachParentParts(base: []const u8) ?AttachParentParts { 1224 const segment_at = std.mem.lastIndexOfScalar(u8, base, '/') orelse return null; 1225 const segment = base[segment_at + 1 ..]; 1226 const colon_at = std.mem.lastIndexOfScalar(u8, segment, ':') orelse return null; 1227 const kind = std.meta.stringToEnum(evt.EventKind, segment[0..colon_at]) orelse return null; 1228 const id_bytes = evt.parseEventId(segment[colon_at + 1 ..]) catch return null; 1229 return .{ .repo_base = base[0..segment_at], .kind = kind, .id_bytes = id_bytes }; 1230 } 1231 1232 // attach the uploaded file to the event the url names, then reload. the file is 1233 // the whole request body, so it streams from the socket into the object store 1234 // without being buffered. 1235 fn handleAttach( 1236 io: std.Io, 1237 request: *std.http.Server.Request, 1238 allocator: std.mem.Allocator, 1239 base: []const u8, 1240 host: Host, 1241 ) !void { 1242 const parts = attachParentParts(base) orelse return respondAttachmentParentNotFound(request); 1243 1244 var author_arena = std.heap.ArenaAllocator.init(allocator); 1245 defer author_arena.deinit(); 1246 const actor = (try authorizeWrite(io, allocator, &author_arena, request, host, parts.repo_base, .read)) orelse return; 1247 const author = actor.author; 1248 // an attachment changes the event it hangs off 1249 const request_repo = (try requestRepoSource(io, allocator, host, parts.repo_base)) orelse return respondAttachmentParentNotFound(request); 1250 defer request_repo.deinit(allocator); 1251 const source = request_repo.source; 1252 if (!try source.canModify(io, allocator, actor, parts.kind, &parts.id_bytes)) return respondForbidden(request); 1253 1254 const name = (try attachmentName(allocator, request)) orelse return respondUploadError(request, .bad_request, "attachment needs a name"); 1255 defer allocator.free(name); 1256 if (!evt.Attachment.nameValid(name)) return respondUploadError(request, .bad_request, "invalid attachment name"); 1257 1258 const size = request.head.content_length orelse return respondUploadError(request, .length_required, "attachments must declare a content length"); 1259 if (size == 0) return respondUploadError(request, .bad_request, "attachment is empty"); 1260 if (size > evt.Attachment.max_size) return respondUploadError(request, .payload_too_large, "attachment is too large"); 1261 1262 const parent_id_hex = std.fmt.bytesToHex(parts.id_bytes, .lower); 1263 1264 var body_buf: [4096]u8 = undefined; 1265 const blob: evt.Blob = .{ .name = name, .size = size, .reader = try request.readerExpectContinue(&body_buf) }; 1266 1267 switch (source.repo_kind) { 1268 inline else => |repo_kind| { 1269 var any_repo = try rp.AnyRepo(repo_kind, .{}).open(io, allocator, source.localInitOpts()); 1270 defer any_repo.deinit(io, allocator); 1271 switch (any_repo) { 1272 inline else => |*repo| _ = evt.Attachment.create(host.event(), repo_kind, repo.self_repo_opts, io, allocator, repo, &parent_id_hex, blob, author) catch |err| switch (err) { 1273 error.ParentNotFound => return respondAttachmentParentNotFound(request), 1274 else => return err, 1275 }, 1276 } 1277 }, 1278 } 1279 1280 // the client reloads the page itself 1281 try request.respond("", .{ .status = .no_content, .keep_alive = false }); 1282 } 1283 1284 // the name the upload declares for its file, percent-encoded so it survives a 1285 // header 1286 fn attachmentName(allocator: std.mem.Allocator, request: *std.http.Server.Request) !?[]u8 { 1287 var iter = request.iterateHeaders(); 1288 while (iter.next()) |header| { 1289 if (!std.ascii.eqlIgnoreCase(header.name, attachment_name_header)) continue; 1290 return try decodeFormValue(allocator, header.value); 1291 } 1292 return null; 1293 } 1294 1295 // an upload that failed leaves the body partly read, so the connection closes 1296 fn respondUploadError(request: *std.http.Server.Request, status: std.http.Status, message: []const u8) !void { 1297 try request.respond(message, .{ 1298 .status = status, 1299 .keep_alive = false, 1300 .extra_headers = &.{.{ .name = "content-type", .value = "text/plain" }}, 1301 }); 1302 } 1303 1304 // re-emit the comment `parts` names with a new body, in the repo the host 1305 // resolves the base to. 1306 fn updateComment( 1307 io: std.Io, 1308 allocator: std.mem.Allocator, 1309 host: Host, 1310 parts: CommentBaseParts, 1311 body: []const u8, 1312 author: evt.CommitAuthor, 1313 ) !void { 1314 const comment_id = parts.comment_id orelse return error.NotFound; 1315 const thread_id = std.fmt.bytesToHex(parts.thread_id, .lower); 1316 const request_repo = (try requestRepoSource(io, allocator, host, parts.repo_base)) orelse return error.NotFound; 1317 defer request_repo.deinit(allocator); 1318 const source = request_repo.source; 1319 switch (source.repo_kind) { 1320 inline else => |repo_kind| { 1321 var any_repo = try rp.AnyRepo(repo_kind, .{}).open(io, allocator, source.localInitOpts()); 1322 defer any_repo.deinit(io, allocator); 1323 switch (any_repo) { 1324 inline else => |*repo| try evt.Comment.update(host.event(), repo_kind, repo.self_repo_opts, io, allocator, repo, &thread_id, &comment_id, body, author), 1325 } 1326 }, 1327 } 1328 } 1329 1330 // edit actions share a suffix; the base identifies the event being edited. 1331 fn handleEdit( 1332 io: std.Io, 1333 request: *std.http.Server.Request, 1334 allocator: std.mem.Allocator, 1335 base: []const u8, 1336 host: Host, 1337 ) !void { 1338 const parts = commentBaseParts(host, base) orelse return respondRemoveNotFound(request); 1339 if (parts.comment_id != null) return handleCommentEdit(io, request, allocator, base, host, parts); 1340 return handleThreadEdit(io, request, allocator, base, host, parts); 1341 } 1342 1343 // replace the body of the comment the url names, then redirect to its 1344 // permalink. 1345 fn handleCommentEdit( 1346 io: std.Io, 1347 request: *std.http.Server.Request, 1348 allocator: std.mem.Allocator, 1349 base: []const u8, 1350 host: Host, 1351 parts: CommentBaseParts, 1352 ) !void { 1353 var author_arena = std.heap.ArenaAllocator.init(allocator); 1354 defer author_arena.deinit(); 1355 const actor = (try authorizeWrite(io, allocator, &author_arena, request, host, parts.repo_base, .read)) orelse return; 1356 const author = actor.author; 1357 // edits only reach here for a comment 1358 const comment_id = parts.comment_id orelse unreachable; 1359 { 1360 const request_repo = (try requestRepoSource(io, allocator, host, parts.repo_base)) orelse return respondRemoveNotFound(request); 1361 defer request_repo.deinit(allocator); 1362 if (!try request_repo.source.canModify(io, allocator, actor, .comment, &comment_id)) return respondForbidden(request); 1363 } 1364 1365 const form_body = try readFormBody(request, allocator); 1366 defer allocator.free(form_body); 1367 const body_crlf = (try parseFormField(allocator, form_body, "body")) orelse try allocator.dupe(u8, ""); 1368 defer allocator.free(body_crlf); 1369 const body = try std.mem.replaceOwned(u8, allocator, body_crlf, "\r\n", "\n"); 1370 defer allocator.free(body); 1371 1372 if (!evt.Comment.fieldsValid(body)) { 1373 const form_location = try std.fmt.allocPrint(allocator, "{s}/edit", .{base}); 1374 defer allocator.free(form_location); 1375 try request.respond("", .{ 1376 .status = .see_other, 1377 .extra_headers = &.{.{ .name = "location", .value = form_location }}, 1378 }); 1379 return; 1380 } 1381 1382 const not_found = "comment not found"; 1383 updateComment(io, allocator, host, parts, body, author) catch |err| switch (err) { 1384 error.NotFound => { 1385 try request.respond(not_found, .{ 1386 .status = .not_found, 1387 .extra_headers = &.{.{ .name = "content-type", .value = "text/plain" }}, 1388 }); 1389 return; 1390 }, 1391 else => |e| return e, 1392 }; 1393 1394 try request.respond("", .{ 1395 .status = .see_other, 1396 .extra_headers = &.{.{ .name = "location", .value = base }}, 1397 }); 1398 } 1399 1400 fn updateThread( 1401 comptime Event: type, 1402 io: std.Io, 1403 allocator: std.mem.Allocator, 1404 host: Host, 1405 repo_base: []const u8, 1406 id: *const [evt.event_id_size]u8, 1407 update: Event.Update, 1408 author: evt.CommitAuthor, 1409 ) !void { 1410 const request_repo = (try requestRepoSource(io, allocator, host, repo_base)) orelse return error.NotFound; 1411 defer request_repo.deinit(allocator); 1412 const source = request_repo.source; 1413 switch (source.repo_kind) { 1414 inline else => |repo_kind| { 1415 var any_repo = try rp.AnyRepo(repo_kind, .{}).open(io, allocator, source.localInitOpts()); 1416 defer any_repo.deinit(io, allocator); 1417 switch (any_repo) { 1418 inline else => |*repo| try Event.update(host.event(), repo_kind, repo.self_repo_opts, io, allocator, repo, id, update, author), 1419 } 1420 }, 1421 } 1422 } 1423 1424 const RemoveParts = struct { 1425 repo_base: []const u8, 1426 kind: evt.EventKind, 1427 id: [evt.event_id_size]u8, 1428 }; 1429 1430 // split a remove url into the repo and event it names 1431 fn removeParts(host: Host, base: []const u8) ?RemoveParts { 1432 if (attachmentRequest(base)) |attachment| { 1433 const parent = attachParentParts(attachment.repo_base) orelse return null; 1434 return .{ 1435 .repo_base = parent.repo_base, 1436 .kind = .attach, 1437 .id = attachment.id, 1438 }; 1439 } 1440 if (commentBaseParts(host, base)) |thread| return .{ 1441 .repo_base = thread.repo_base, 1442 .kind = if (thread.comment_id != null) .comment else thread.thread_kind, 1443 .id = thread.comment_id orelse thread.thread_id, 1444 }; 1445 return null; 1446 } 1447 1448 // remove the event named by the form's url 1449 fn handleRemove( 1450 io: std.Io, 1451 request: *std.http.Server.Request, 1452 allocator: std.mem.Allocator, 1453 base: []const u8, 1454 host: Host, 1455 ) !void { 1456 const parts = removeParts(host, base) orelse return respondRemoveNotFound(request); 1457 1458 var author_arena = std.heap.ArenaAllocator.init(allocator); 1459 defer author_arena.deinit(); 1460 const actor = (try authorizeWrite(io, allocator, &author_arena, request, host, parts.repo_base, .read)) orelse return; 1461 const author = actor.author; 1462 1463 const request_repo = (try requestRepoSource(io, allocator, host, parts.repo_base)) orelse return respondRemoveNotFound(request); 1464 defer request_repo.deinit(allocator); 1465 const source = request_repo.source; 1466 1467 if (parts.kind == .patch) switch (host) { 1468 .server => |server| { 1469 const user_id = actor.user_id orelse return respondLoginRequired(request); 1470 1471 // a draft lives in its author's user repo 1472 if (try evt.readForkById(io, allocator, &author_arena, server.users_dir, &user_id, &parts.id)) |fork_record| { 1473 const repo_id = evt.parseEventId(std.fs.path.basename(source.path)) catch return respondRemoveNotFound(request); 1474 if (!fork_record.removed and fork_record.event.stage == .draft and std.mem.eql(u8, fork_record.event.repo_id, &repo_id)) { 1475 const id = std.fmt.bytesToHex(parts.id, .lower); 1476 try fork.remove(io, allocator, server.users_dir, &user_id, &id, author); 1477 1478 const location = try std.fmt.allocPrint(allocator, "{s}/patches/drafts", .{parts.repo_base}); 1479 defer allocator.free(location); 1480 try request.respond("", .{ 1481 .status = .see_other, 1482 .keep_alive = false, 1483 .extra_headers = &.{.{ .name = "location", .value = location }}, 1484 }); 1485 return; 1486 } 1487 } 1488 }, 1489 .local => {}, 1490 }; 1491 1492 // a draft is its author's alone, which its removal above checks 1493 if (!try source.canModify(io, allocator, actor, parts.kind, &parts.id)) return respondForbidden(request); 1494 1495 switch (source.repo_kind) { 1496 inline else => |repo_kind| { 1497 var any_repo = try rp.AnyRepo(repo_kind, .{}).open(io, allocator, source.localInitOpts()); 1498 defer any_repo.deinit(io, allocator); 1499 switch (any_repo) { 1500 inline else => |*repo| evt.remove(host.event(), .repo, repo_kind, repo.self_repo_opts, io, allocator, repo, &parts.id, parts.kind, author) catch |err| switch (err) { 1501 error.EventNotFound => return respondRemoveNotFound(request), 1502 else => |e| return e, 1503 }, 1504 } 1505 }, 1506 } 1507 1508 const id = std.fmt.bytesToHex(parts.id, .lower); 1509 const location = try std.fmt.allocPrint(allocator, "{s}/event:{s}/kind:{s}", .{ parts.repo_base, &id, @tagName(parts.kind) }); 1510 defer allocator.free(location); 1511 try request.respond("", .{ 1512 .status = .see_other, 1513 .keep_alive = false, 1514 .extra_headers = &.{.{ .name = "location", .value = location }}, 1515 }); 1516 } 1517 1518 fn respondRemoveNotFound(request: *std.http.Server.Request) !void { 1519 try request.respond("event not found", .{ 1520 .status = .not_found, 1521 .extra_headers = &.{.{ .name = "content-type", .value = "text/plain" }}, 1522 }); 1523 } 1524 1525 fn updateDiscussion( 1526 io: std.Io, 1527 allocator: std.mem.Allocator, 1528 host: Host, 1529 repo_base: []const u8, 1530 id: *const [evt.event_id_size]u8, 1531 title: []const u8, 1532 labels: []const u8, 1533 description: []const u8, 1534 author: evt.CommitAuthor, 1535 ) !void { 1536 const request_repo = (try requestRepoSource(io, allocator, host, repo_base)) orelse return error.NotFound; 1537 defer request_repo.deinit(allocator); 1538 const source = request_repo.source; 1539 switch (source.repo_kind) { 1540 inline else => |repo_kind| { 1541 var any_repo = try rp.AnyRepo(repo_kind, .{}).open(io, allocator, source.localInitOpts()); 1542 defer any_repo.deinit(io, allocator); 1543 switch (any_repo) { 1544 inline else => |*repo| try evt.Discussion.update(host.event(), repo_kind, repo.self_repo_opts, io, allocator, repo, id, title, labels, description, author), 1545 } 1546 }, 1547 } 1548 } 1549 1550 // set the status of the issue the url names (base is 1551 // "/<owner>:<name>/issue:<id>", identity elided in local mode) by 1552 // re-emitting its event, then redirect back to it 1553 fn handleThreadStatus( 1554 io: std.Io, 1555 request: *std.http.Server.Request, 1556 allocator: std.mem.Allocator, 1557 base: []const u8, 1558 host: Host, 1559 open: bool, 1560 ) !void { 1561 const not_found = "thread not found"; 1562 const parts = commentBaseParts(host, base) orelse { 1563 try request.respond(not_found, .{ 1564 .status = .not_found, 1565 .extra_headers = &.{.{ .name = "content-type", .value = "text/plain" }}, 1566 }); 1567 return; 1568 }; 1569 1570 var author_arena = std.heap.ArenaAllocator.init(allocator); 1571 defer author_arena.deinit(); 1572 const actor = (try authorizeWrite(io, allocator, &author_arena, request, host, parts.repo_base, .read)) orelse return; 1573 const author = actor.author; 1574 { 1575 const request_repo = (try requestRepoSource(io, allocator, host, parts.repo_base)) orelse return respondRemoveNotFound(request); 1576 defer request_repo.deinit(allocator); 1577 if (!try request_repo.source.canModify(io, allocator, actor, parts.thread_kind, &parts.thread_id)) return respondForbidden(request); 1578 } 1579 1580 (switch (parts.thread_kind) { 1581 .issue => updateThread(evt.Issue, io, allocator, host, parts.repo_base, &parts.thread_id, .{ .status = if (open) .open else .closed }, author), 1582 .patch => updateThread(evt.Patch, io, allocator, host, parts.repo_base, &parts.thread_id, .{ .status = if (open) .open else .closed }, author), 1583 else => return respondRemoveNotFound(request), 1584 }) catch |err| switch (err) { 1585 error.NotFound => { 1586 try request.respond(not_found, .{ 1587 .status = .not_found, 1588 .extra_headers = &.{.{ .name = "content-type", .value = "text/plain" }}, 1589 }); 1590 return; 1591 }, 1592 else => |e| return e, 1593 }; 1594 1595 // like logout, this is a bodyless POST, so close the connection rather than 1596 // letting the keep-alive path try to discard a body that isn't framed. 1597 try request.respond("", .{ 1598 .status = .see_other, 1599 .keep_alive = false, 1600 .extra_headers = &.{.{ .name = "location", .value = base }}, 1601 }); 1602 } 1603 1604 // replace a thread's editable fields. 1605 fn handleThreadEdit( 1606 io: std.Io, 1607 request: *std.http.Server.Request, 1608 allocator: std.mem.Allocator, 1609 base: []const u8, 1610 host: Host, 1611 parts: CommentBaseParts, 1612 ) !void { 1613 var author_arena = std.heap.ArenaAllocator.init(allocator); 1614 defer author_arena.deinit(); 1615 const actor = (try authorizeWrite(io, allocator, &author_arena, request, host, parts.repo_base, .read)) orelse return; 1616 const author = actor.author; 1617 1618 const body = try readFormBody(request, allocator); 1619 defer allocator.free(body); 1620 1621 const title = (try parseFormField(allocator, body, "title")) orelse try allocator.dupe(u8, ""); 1622 defer allocator.free(title); 1623 const labels = (try parseFormField(allocator, body, "labels")) orelse try allocator.dupe(u8, ""); 1624 defer allocator.free(labels); 1625 const description_crlf = (try parseFormField(allocator, body, "description")) orelse try allocator.dupe(u8, ""); 1626 defer allocator.free(description_crlf); 1627 // form submission normalizes textarea line breaks to CRLF; store plain 1628 // newlines so the text renders the same on every host 1629 const description = try std.mem.replaceOwned(u8, allocator, description_crlf, "\r\n", "\n"); 1630 defer allocator.free(description); 1631 const target_branch = (try parseFormField(allocator, body, "target_branch")) orelse try allocator.dupe(u8, ""); 1632 defer allocator.free(target_branch); 1633 1634 // invalid fields send the user back to the edit form 1635 const valid = switch (parts.thread_kind) { 1636 .issue => evt.Issue.fieldsValid(title, labels), 1637 .patch => evt.Patch.fieldsValid(title, labels), 1638 .discuss => evt.Discussion.fieldsValid(title, labels), 1639 else => unreachable, 1640 }; 1641 if (!valid) { 1642 const form_location = try std.fmt.allocPrint(allocator, "{s}/edit", .{base}); 1643 defer allocator.free(form_location); 1644 if (!evt.titleValid(title)) { 1645 return respondThreadFormFailure(request, allocator, host, form_location, requiredTitleFeedback(parts.thread_kind, title, labels, description, target_branch, null)); 1646 } 1647 try request.respond("", .{ 1648 .status = .see_other, 1649 .extra_headers = &.{.{ .name = "location", .value = form_location }}, 1650 }); 1651 return; 1652 } 1653 1654 const request_repo = (try requestRepoSource(io, allocator, host, parts.repo_base)) orelse return respondRemoveNotFound(request); 1655 defer request_repo.deinit(allocator); 1656 1657 const draft_user_id = if (parts.thread_kind == .patch) actor.user_id else null; 1658 if (draft_user_id) |user_id| { 1659 const server = switch (host) { 1660 .server => |server| server, 1661 .local => unreachable, 1662 }; 1663 if (!evt.Patch.branchValid(target_branch) or !try request_repo.source.hasBranch(io, allocator, target_branch)) { 1664 const form_location = try std.fmt.allocPrint(allocator, "{s}/edit", .{base}); 1665 defer allocator.free(form_location); 1666 return respondThreadFormFailure(request, allocator, host, form_location, patchFeedback(.invalid_target_branch, title, labels, description, target_branch, null)); 1667 } 1668 const repo_id = evt.parseEventId(std.fs.path.basename(request_repo.source.path)) catch return respondRemoveNotFound(request); 1669 var admin_repo = try rp.Repo(.xit, evt.admin_repo_opts).open(io, allocator, .{ .path = server.admin_repo_path }); 1670 defer admin_repo.deinit(io, allocator); 1671 const id = std.fmt.bytesToHex(parts.thread_id, .lower); 1672 if (try pch.editDraft(.{}, io, allocator, server.users_dir, &admin_repo, .{ 1673 .id = id, 1674 .user_id = user_id, 1675 .repo_id = repo_id, 1676 .title = title, 1677 .labels = labels, 1678 .description = description, 1679 .target_branch = target_branch, 1680 .author = author, 1681 .timestamp = @intCast(std.Io.Timestamp.now(io, .real).toSeconds()), 1682 })) { 1683 try request.respond("", .{ 1684 .status = .see_other, 1685 .extra_headers = &.{.{ .name = "location", .value = base }}, 1686 }); 1687 return; 1688 } 1689 } 1690 1691 // a draft is its author's alone, which its edit above checks 1692 if (!try request_repo.source.canModify(io, allocator, actor, parts.thread_kind, &parts.thread_id)) return respondForbidden(request); 1693 1694 const not_found = switch (parts.thread_kind) { 1695 .issue => "issue not found", 1696 .patch => "patch not found", 1697 .discuss => "discussion not found", 1698 else => unreachable, 1699 }; 1700 (switch (parts.thread_kind) { 1701 .issue => updateThread(evt.Issue, io, allocator, host, parts.repo_base, &parts.thread_id, .{ .fields = .{ 1702 .title = title, 1703 .labels = labels, 1704 .description = description, 1705 } }, author), 1706 .patch => updateThread(evt.Patch, io, allocator, host, parts.repo_base, &parts.thread_id, .{ .fields = .{ 1707 .title = title, 1708 .labels = labels, 1709 .description = description, 1710 .target_branch = target_branch, 1711 } }, author), 1712 .discuss => updateDiscussion(io, allocator, host, parts.repo_base, &parts.thread_id, title, labels, description, author), 1713 else => unreachable, 1714 }) catch |err| switch (err) { 1715 error.NotFound => { 1716 try request.respond(not_found, .{ 1717 .status = .not_found, 1718 .extra_headers = &.{.{ .name = "content-type", .value = "text/plain" }}, 1719 }); 1720 return; 1721 }, 1722 else => { 1723 if (parts.thread_kind != .patch) return err; 1724 const failure = ui.Session.FormFeedback.PatchFailure.fromError(err) orelse return err; 1725 const form_location = try std.fmt.allocPrint(allocator, "{s}/edit", .{base}); 1726 defer allocator.free(form_location); 1727 return respondThreadFormFailure(request, allocator, host, form_location, patchFeedback(failure, title, labels, description, target_branch, null)); 1728 }, 1729 }; 1730 1731 try request.respond("", .{ 1732 .status = .see_other, 1733 .extra_headers = &.{.{ .name = "location", .value = base }}, 1734 }); 1735 } 1736 1737 // resolve every conflicted field of the thread the url names 1738 fn handleThreadResolve( 1739 io: std.Io, 1740 request: *std.http.Server.Request, 1741 allocator: std.mem.Allocator, 1742 base: []const u8, 1743 host: Host, 1744 ) !void { 1745 const parts = commentBaseParts(host, base) orelse { 1746 try request.respond("thread not found", .{ 1747 .status = .not_found, 1748 .extra_headers = &.{.{ .name = "content-type", .value = "text/plain" }}, 1749 }); 1750 return; 1751 }; 1752 1753 var author_arena = std.heap.ArenaAllocator.init(allocator); 1754 defer author_arena.deinit(); 1755 const author = ((try authorizeWrite(io, allocator, &author_arena, request, host, parts.repo_base, .write)) orelse return).author; 1756 1757 const body = try readFormBody(request, allocator); 1758 defer allocator.free(body); 1759 1760 var field_arena = std.heap.ArenaAllocator.init(allocator); 1761 defer field_arena.deinit(); 1762 const aa = field_arena.allocator(); 1763 const title = try parseFormField(aa, body, "title"); 1764 const labels = try parseFormField(aa, body, "labels"); 1765 1766 // the hunk inputs are submitted as d0, d1, ...; form submission normalizes their 1767 // textarea line breaks to CRLF 1768 var hunks: std.ArrayList([]const u8) = .empty; 1769 var hunk_index: usize = 0; 1770 while (true) : (hunk_index += 1) { 1771 const name = try std.fmt.allocPrint(aa, "d{d}", .{hunk_index}); 1772 const submitted = (try parseFormField(aa, body, name)) orelse break; 1773 try hunks.append(aa, try std.mem.replaceOwned(u8, aa, submitted, "\r\n", "\n")); 1774 } 1775 1776 if (parts.comment_id != null or (parts.thread_kind != .issue and parts.thread_kind != .patch)) { 1777 try request.respond("thread not found", .{ 1778 .status = .not_found, 1779 .extra_headers = &.{.{ .name = "content-type", .value = "text/plain" }}, 1780 }); 1781 return; 1782 } 1783 const route = routeFromUrl(host, base) orelse { 1784 try request.respond("thread not found", .{ 1785 .status = .not_found, 1786 .extra_headers = &.{.{ .name = "content-type", .value = "text/plain" }}, 1787 }); 1788 return; 1789 }; 1790 const theirs: []const u8 = switch (route) { 1791 .repo_patches => |*patch| patch.theirs.slice(), 1792 .repo_issues => "", 1793 else => unreachable, 1794 }; 1795 const not_found = if (parts.thread_kind == .patch) "patch not found" else "issue not found"; 1796 1797 (switch (parts.thread_kind) { 1798 .issue => updateThread(evt.Issue, io, allocator, host, parts.repo_base, &parts.thread_id, .{ .resolve = .{ 1799 .title = title, 1800 .labels = labels, 1801 .hunks = hunks.items, 1802 } }, author), 1803 .patch => updateThread(evt.Patch, io, allocator, host, parts.repo_base, &parts.thread_id, .{ .resolve = .{ 1804 .title = title, 1805 .labels = labels, 1806 .hunks = hunks.items, 1807 .theirs = theirs, 1808 } }, author), 1809 else => unreachable, 1810 }) catch |err| switch (err) { 1811 error.NotFound => { 1812 try request.respond(not_found, .{ 1813 .status = .not_found, 1814 .extra_headers = &.{.{ .name = "content-type", .value = "text/plain" }}, 1815 }); 1816 return; 1817 }, 1818 // invalid fields send the user back to the resolve form 1819 error.InvalidFields => { 1820 const form_location = try std.fmt.allocPrint(allocator, "{s}/resolve", .{base}); 1821 defer allocator.free(form_location); 1822 try request.respond("", .{ 1823 .status = .see_other, 1824 .extra_headers = &.{.{ .name = "location", .value = form_location }}, 1825 }); 1826 return; 1827 }, 1828 else => |e| return e, 1829 }; 1830 1831 try request.respond("", .{ 1832 .status = .see_other, 1833 .extra_headers = &.{.{ .name = "location", .value = base }}, 1834 }); 1835 } 1836 1837 // the posted path drops the action's own segment, so the route it parses is 1838 // the undo page the action applies to, never the confirmation page itself 1839 fn handleUndo(io: std.Io, request: *std.http.Server.Request, allocator: std.mem.Allocator, base: []const u8, host: Host, action: enum { undo, clear }) !void { 1840 const route = routeFromUrl(host, base) orelse return respondRepoNotFound(request); 1841 if (route != .repo_undo) return respondRepoNotFound(request); 1842 const target = route.repo_undo; 1843 var arena = std.heap.ArenaAllocator.init(allocator); 1844 defer arena.deinit(); 1845 const repo_base = if (target.name.len == 0) "" else try std.fmt.allocPrint(arena.allocator(), "/{s}", .{target.name.slice()}); 1846 _ = (try authorizeWrite(io, allocator, &arena, request, host, repo_base, .owner)) orelse return; 1847 const resolved = (try requestRepoSource(io, allocator, host, repo_base)) orelse return respondRepoNotFound(request); 1848 defer resolved.deinit(allocator); 1849 (switch (action) { 1850 .undo => ui.Repo.Undo.execute(io, allocator, resolved.source, target.index orelse return respondRepoNotFound(request)), 1851 .clear => ui.Repo.Undo.clearHistory(io, allocator, resolved.source), 1852 }) catch |err| switch (err) { 1853 error.NotFound, error.InvalidHistoryIndex, error.TransactionNotFound => return respondRepoNotFound(request), 1854 else => return err, 1855 }; 1856 const location = try (ui.RoutablePage.repoUndoRoute(target.name.slice(), null) orelse return error.RouteTooLong).toUrl(&arena); 1857 try request.respond("", .{ .status = .see_other, .keep_alive = false, .extra_headers = &.{.{ .name = "location", .value = location }} }); 1858 } 1859 1860 fn handleSync( 1861 io: std.Io, 1862 request: *std.http.Server.Request, 1863 allocator: std.mem.Allocator, 1864 base: []const u8, 1865 source: ui.RepoSource, 1866 ) !void { 1867 if (base.len != 0) { 1868 try request.respond("not found", .{ 1869 .status = .not_found, 1870 .extra_headers = &.{.{ .name = "content-type", .value = "text/plain" }}, 1871 }); 1872 return; 1873 } 1874 1875 var owned_failure: ?[]u8 = null; 1876 defer if (owned_failure) |message| allocator.free(message); 1877 const failure: ?[]const u8 = blk: { 1878 owned_failure = ui.Repo.Events.sync(io, allocator, source) catch |err| break :blk @errorName(err); 1879 break :blk owned_failure; 1880 }; 1881 if (failure) |message| { 1882 var encoded: std.Io.Writer.Allocating = .init(allocator); 1883 defer encoded.deinit(); 1884 try std.Uri.Component.percentEncode(&encoded.writer, message, struct { 1885 fn isUnreserved(c: u8) bool { 1886 return std.ascii.isAlphanumeric(c) or c == '-' or c == '.' or c == '_' or c == '~'; 1887 } 1888 }.isUnreserved); 1889 const cookie = try std.fmt.allocPrint( 1890 allocator, 1891 local_flash_cookie ++ "=" ++ local_sync_failure_prefix ++ "{s}; Path=/; HttpOnly; SameSite=Strict", 1892 .{encoded.written()}, 1893 ); 1894 defer allocator.free(cookie); 1895 try request.respond("", .{ 1896 .status = .see_other, 1897 .extra_headers = &.{ 1898 .{ .name = "location", .value = "/events" }, 1899 .{ .name = "set-cookie", .value = cookie }, 1900 }, 1901 }); 1902 return; 1903 } 1904 1905 try request.respond("", .{ 1906 .status = .see_other, 1907 .extra_headers = &.{ 1908 .{ .name = "location", .value = "/events" }, 1909 .{ .name = "set-cookie", .value = local_flash_cookie ++ "=; Path=/; Max-Age=0" }, 1910 }, 1911 }); 1912 } 1913 1914 fn renderIndexHtml( 1915 io: std.Io, 1916 allocator: std.mem.Allocator, 1917 host: Host, 1918 session_token: ?[]const u8, 1919 session_data: ui.Session.Data, 1920 ) ![]const u8 { 1921 const template = (findEmbed("/index.html") orelse return error.MissingIndexAsset).body; 1922 1923 var page_arena = std.heap.ArenaAllocator.init(allocator); 1924 defer page_arena.deinit(); 1925 1926 // the server admin repo must outlive the page build, since the session's 1927 // moment reads from it. 1928 var repo_maybe: ?rp.Repo(.xit, evt.admin_repo_opts) = null; 1929 defer if (repo_maybe) |*repo| repo.deinit(io, allocator); 1930 1931 var session = switch (host) { 1932 .server => |server| blk: { 1933 // open the admin repo to read live user/repo data. 1934 repo_maybe = try rp.Repo(.xit, evt.admin_repo_opts).open(io, allocator, .{ .path = server.admin_repo_path }); 1935 const repo = if (repo_maybe) |*repo| repo else unreachable; 1936 var session = try ui.Session.init(&page_arena, repo, session_data); 1937 // the session dropped a user whose account was removed, so revoke 1938 // the token that named them 1939 if (session_token) |token| { 1940 if (session.data.user_id == null) server.session_store.remove(token); 1941 } 1942 // give the page builders filesystem access to the on-disk repos (a 1943 // sibling "users" dir next to the admin repo) so the Repo page can 1944 // read its files. 1945 session.users_dir = server.users_dir; 1946 break :blk session; 1947 }, 1948 .local => |local| ui.Session{ 1949 .data = session_data, 1950 .arena = &page_arena, 1951 .page_arena = &page_arena, 1952 .local = local, 1953 }, 1954 }; 1955 session.io = io; 1956 1957 var page = try ui.Page.init(session.page_arena, &session, session.data.current_page); 1958 var root = try ui.initRoot(allocator, &page, &session); 1959 defer root.deinit(allocator); 1960 1961 const snapshot: ui.Snapshot = .{ .page = page, .session = session.data }; 1962 1963 const content = try generateHtml(allocator, &root, &session); 1964 defer allocator.free(content); 1965 1966 // serialize the snapshot so the wasm side can parse it back without making 1967 // a second request. it's embedded raw in a <script type="application/json"> 1968 // block, whose content is raw text terminated only by "</script". in json, 1969 // '<' appears solely inside string values, so escaping every '<' (and '>' 1970 // for good measure) to its \uXXXX form yields equivalent json that can't 1971 // break out of the tag. 1972 var json: std.Io.Writer.Allocating = .init(allocator); 1973 defer json.deinit(); 1974 try std.json.Stringify.value(snapshot, .{}, &json.writer); 1975 1976 var json_escaped: std.ArrayList(u8) = .empty; 1977 defer json_escaped.deinit(allocator); 1978 for (json.written()) |c| switch (c) { 1979 '<' => try json_escaped.appendSlice(allocator, "\\u003c"), 1980 '>' => try json_escaped.appendSlice(allocator, "\\u003e"), 1981 else => try json_escaped.append(allocator, c), 1982 }; 1983 1984 var out: std.ArrayList(u8) = .empty; 1985 errdefer out.deinit(allocator); 1986 { 1987 var cursor: usize = 0; 1988 for (&[_]struct { needle: []const u8, replacement: []const u8 }{ 1989 .{ .needle = "{{{ HAXY_HTML }}}", .replacement = content }, 1990 .{ .needle = "{{{ HAXY_JSON }}}", .replacement = json_escaped.items }, 1991 }) |sub| { 1992 const idx = std.mem.indexOfPos(u8, template, cursor, sub.needle) orelse return error.MissingTemplateToken; 1993 try out.appendSlice(allocator, template[cursor..idx]); 1994 try out.appendSlice(allocator, sub.replacement); 1995 cursor = idx + sub.needle.len; 1996 } 1997 try out.appendSlice(allocator, template[cursor..]); 1998 } 1999 return try out.toOwnedSlice(allocator); 2000 } 2001 2002 fn findEmbed(request_path: []const u8) ?Embed { 2003 // embeds are matched before pages, so a dot keeps them from claiming a username or tab 2004 comptime for (embeds) |embed| { 2005 if (std.mem.indexOfScalar(u8, embed.path, '.') == null) @compileError("embed path needs a '.' so it can't shadow a page: " ++ embed.path); 2006 }; 2007 if (request_path.len < 2 or request_path[0] != '/') return null; 2008 const path = request_path[1..]; 2009 2010 for (embeds) |embed| { 2011 if (std.mem.eql(u8, path, embed.path)) return embed; 2012 } 2013 return null; 2014 } 2015 2016 // emits the TUI grid cells as static HTML. each web-native Scroll becomes its 2017 // own absolutely-positioned, natively-scrollable <div> holding its full content, 2018 // rendered recursively so nested scrolls work. 2019 pub fn generateHtml(allocator: std.mem.Allocator, root: *ui.Widget, session: *ui.Session) ![]const u8 { 2020 const grid = root.getGrid() orelse return error.MissingGrid; 2021 const root_focus = root.getFocus(); 2022 2023 var out: std.ArrayList(u8) = .empty; 2024 errdefer out.deinit(allocator); 2025 2026 switch (root.*) { 2027 .background => |*background| { 2028 if (background.art.getGrid()) |art| { 2029 try out.print(allocator, "<div class=\"ansi-art\" aria-hidden=\"true\" style=\"left:{d}ch;opacity:{d}%\">", .{ grid.size.width -| art.size.width, ui.widget.AnsiBackground.art_opacity }); 2030 try renderPanel(allocator, &out, background.art.getFocus(), art, session, root_focus); 2031 try out.appendSlice(allocator, "</div>"); 2032 } 2033 }, 2034 else => {}, 2035 } 2036 try out.appendSlice(allocator, "<div class=\"grid-content\" data-key=\"panel:root\">"); 2037 try renderPanel(allocator, &out, root_focus, grid, session, root_focus); 2038 try out.appendSlice(allocator, "</div>"); 2039 try renderForms(allocator, &out, root_focus); 2040 return try out.toOwnedSlice(allocator); 2041 } 2042 2043 // render one panel — a focus subtree and its content grid — as HTML, recursing 2044 // once per web-native Scroll inside it. the root panel is the whole page; each 2045 // Scroll becomes a nested, natively-scrollable div holding its full content. 2046 // emits the panel's grid cells as text, leaving holes where child scrolls sit, 2047 // then the child scroll divs over those holes. 2048 fn renderPanel(allocator: std.mem.Allocator, output: *std.ArrayList(u8), focus: *Focus, grid: Grid, session: *ui.Session, root_focus: *Focus) !void { 2049 // `direct` is this panel's scroll children, each drawn as an overlaid div. 2050 // `excluded` is every focus id that belongs to a scroll (the scroll nodes 2051 // plus their descendants, which the focus tree flattens into this panel's 2052 // children): the cell hit-test below skips them so this panel doesn't claim 2053 // cells that are really rendered inside a child scroll's own panel. 2054 // (scrolls aren't nested in practice, so every scroll child is direct here.) 2055 var direct: std.ArrayList(usize) = .empty; 2056 defer direct.deinit(allocator); 2057 var excluded: std.AutoHashMapUnmanaged(usize, void) = .empty; 2058 defer excluded.deinit(allocator); 2059 { 2060 var it = focus.children.iterator(); 2061 while (it.next()) |e| { 2062 if (e.value_ptr.focus.scroll == null) continue; 2063 try direct.append(allocator, e.key_ptr.*); 2064 try excluded.put(allocator, e.key_ptr.*, {}); 2065 var mit = e.value_ptr.focus.children.iterator(); 2066 while (mit.next()) |m| try excluded.put(allocator, m.key_ptr.*, {}); 2067 } 2068 } 2069 2070 // the HTML element a run of cells is wrapped in, chosen from the cell's 2071 // focusable kind 2072 const CellTag = union(enum) { 2073 span, // clickable focusable cell 2074 a: []const u8, // clickable focusable link 2075 plain, // non-focusable, colored 2076 2077 const a_prefix = "a:"; 2078 // an "in-page" anchor: rendered as a real <a href> so it works with js 2079 // disabled, but wasm handles it without navigating. 2080 fn init(str: []const u8) @This() { 2081 if (std.mem.startsWith(u8, str, ui.raw_link_prefix)) { 2082 return .{ .a = str[ui.raw_link_prefix.len..] }; 2083 } 2084 if (std.mem.startsWith(u8, str, ui.in_page_link_prefix)) { 2085 return .{ .a = str[ui.in_page_link_prefix.len..] }; 2086 } 2087 if (std.mem.startsWith(u8, str, a_prefix)) { 2088 return .{ .a = str[a_prefix.len..] }; 2089 } 2090 return .span; 2091 } 2092 2093 fn writeOpenTag(self: @This(), alloc: std.mem.Allocator, out: *std.ArrayList(u8), id: usize, style_attr: []const u8) !void { 2094 var id_buf: [32]u8 = undefined; 2095 switch (self) { 2096 .span => { 2097 try out.appendSlice(alloc, "<span class=\"clickable\" data-focus-id=\""); 2098 try out.appendSlice(alloc, try std.fmt.bufPrint(&id_buf, "{d}", .{id})); 2099 try out.appendSlice(alloc, "\""); 2100 try out.appendSlice(alloc, style_attr); 2101 try out.appendSlice(alloc, ">"); 2102 }, 2103 .a => |href| { 2104 // tabindex=-1 keeps these out of the browser's tab order 2105 try out.appendSlice(alloc, "<a class=\"clickable\" tabindex=\"-1\" data-focus-id=\""); 2106 try out.appendSlice(alloc, try std.fmt.bufPrint(&id_buf, "{d}", .{id})); 2107 try out.appendSlice(alloc, "\" href=\""); 2108 try appendEscapedHtml(alloc, out, href); 2109 try out.appendSlice(alloc, "\""); 2110 try out.appendSlice(alloc, style_attr); 2111 try out.appendSlice(alloc, ">"); 2112 }, 2113 .plain => { 2114 try out.appendSlice(alloc, "<span"); 2115 try out.appendSlice(alloc, style_attr); 2116 try out.appendSlice(alloc, ">"); 2117 }, 2118 } 2119 } 2120 2121 fn closeTag(self: @This()) []const u8 { 2122 return switch (self) { 2123 .span, .plain => "</span>", 2124 .a => "</a>", 2125 }; 2126 } 2127 }; 2128 2129 // the focusable owning each cell, among this panel's own (skipping any 2130 // that belong to a child scroll, whose cells are drawn in their own panel). 2131 // claimed in focus order, so the first focusable over a cell keeps it. 2132 // looking every focusable up for every cell is quadratic in a long list. 2133 const owners = try allocator.alloc(?usize, grid.size.width * grid.size.height); 2134 defer allocator.free(owners); 2135 @memset(owners, null); 2136 { 2137 var it = focus.children.iterator(); 2138 while (it.next()) |entry| { 2139 const child = entry.value_ptr.*; 2140 if (child.focus.mode != .all) continue; 2141 if (excluded.contains(entry.key_ptr.*)) continue; 2142 const r = child.rect; 2143 for (@min(r.y, grid.size.height)..@min(r.y + r.size.height, grid.size.height)) |y| { 2144 for (@min(r.x, grid.size.width)..@min(r.x + r.size.width, grid.size.width)) |x| { 2145 const owner = &owners[y * grid.size.width + x]; 2146 if (owner.* == null) owner.* = entry.key_ptr.*; 2147 } 2148 } 2149 } 2150 } 2151 2152 // the cells are the volatile part of a panel. js replaces this one subtree 2153 // wholesale while retaining the panel's native controls and scroll shells. 2154 try output.appendSlice(allocator, "<div class=\"grid-cells\">"); 2155 2156 // emit this panel's grid as rows of text, coalescing adjacent cells that 2157 // share a focus id and style into one tag (a clickable span, a link, or a 2158 // plain styled span). cells under a child scroll keep only their background. 2159 // a cell's own link is an anchor nested in that tag. 2160 for (0..grid.size.height) |y| { 2161 var cur_id: ?usize = null; 2162 var cur_style: Grid.Style = .{}; 2163 var open_tag: ?CellTag = null; 2164 var open_link: ?[]const u8 = null; 2165 var first = true; 2166 for (0..grid.size.width) |x| { 2167 const cell = (try grid.cell(x, y)).*; 2168 // a cell covered by a child scroll's viewport is drawn by that scroll's 2169 // own div, so blank its glyph and make it non-clickable here — but keep 2170 // its background, so the backdrop still shows through the scroll's 2171 // transparent div instead of a bare hole. 2172 const covered_by_scroll = blk: { 2173 for (direct.items) |id| { 2174 const r = (focus.children.get(id) orelse continue).rect; 2175 if (x >= r.x and y >= r.y and x < r.x + r.size.width and y < r.y + r.size.height) break :blk true; 2176 } 2177 break :blk false; 2178 }; 2179 // the focusable owning the cell at (x, y); none for a covered cell. 2180 const cell_id = if (covered_by_scroll) null else owners[y * grid.size.width + x]; 2181 const style: Grid.Style = if (covered_by_scroll) .{ .bg = cell.style.bg } else cell.style; 2182 2183 if (first or cell_id != cur_id or !style.eql(cur_style)) { 2184 if (open_link != null) try output.appendSlice(allocator, "</a>"); 2185 open_link = null; 2186 if (open_tag) |t| try output.appendSlice(allocator, t.closeTag()); 2187 2188 var new_tag: ?CellTag = null; 2189 if (cell_id) |id| { 2190 if (focus.children.get(id)) |child| { 2191 new_tag = switch (child.focus.kind) { 2192 .custom => |custom| CellTag.init(custom), 2193 else => .span, 2194 }; 2195 } 2196 } 2197 if (new_tag == null and !style.eql(.{})) new_tag = .plain; 2198 2199 if (new_tag) |t| { 2200 var style_buf: [192]u8 = undefined; 2201 try t.writeOpenTag(allocator, output, cell_id orelse 0, styleAttr(&style_buf, style)); 2202 } 2203 2204 open_tag = new_tag; 2205 cur_id = cell_id; 2206 cur_style = style; 2207 first = false; 2208 } 2209 2210 // an anchor can't nest in another, so a link tag's cells skip theirs 2211 const in_anchor = if (open_tag) |t| t == .a else false; 2212 const link = if (covered_by_scroll or in_anchor) null else webLink(cell.link); 2213 if (!sameLink(link, open_link)) { 2214 if (open_link != null) try output.appendSlice(allocator, "</a>"); 2215 if (link) |url| { 2216 try output.appendSlice(allocator, "<a class=\"cell-link\" tabindex=\"-1\" target=\"_blank\" rel=\"noopener noreferrer\" href=\""); 2217 try appendEscapedHtml(allocator, output, url); 2218 try output.appendSlice(allocator, "\">"); 2219 } 2220 open_link = link; 2221 } 2222 2223 if (covered_by_scroll) { 2224 try appendEscapedHtml(allocator, output, " "); 2225 } else if (cell.continuation) { 2226 // the wide rune to the left was emitted 2ch wide, covering this column 2227 } else if (cell.rune) |rune| { 2228 var encoded: [4]u8 = undefined; 2229 const encoded_len = try std.unicode.utf8Encode(rune, &encoded); 2230 const rune_text = encoded[0..encoded_len]; 2231 // a double-width rune is pinned inside a 2ch span so the 2232 // fallback glyph's advance width can't shift the rest of the row 2233 const wide = x + 1 < grid.size.width and (try grid.cell(x + 1, y)).continuation; 2234 if (wide) { 2235 try output.appendSlice(allocator, "<span class=\"w2\">"); 2236 try appendEscapedHtml(allocator, output, rune_text); 2237 try output.appendSlice(allocator, "</span>"); 2238 } else { 2239 try appendEscapedHtml(allocator, output, rune_text); 2240 } 2241 } else { 2242 try appendEscapedHtml(allocator, output, " "); 2243 } 2244 } 2245 if (open_link != null) try output.appendSlice(allocator, "</a>"); 2246 if (open_tag) |t| try output.appendSlice(allocator, t.closeTag()); 2247 try output.append(allocator, '\n'); 2248 } 2249 try output.appendSlice(allocator, "</div>"); 2250 2251 // native controls live in their panel, beside the replaceable cells. their 2252 // stable keys let JS update layout without recreating their DOM nodes, and 2253 // being actual descendants of a scroll gives them native movement/clipping. 2254 try renderPanelControls(allocator, output, focus, session, root_focus, &excluded); 2255 2256 // each child scroll becomes a natively-scrollable div positioned over its 2257 // viewport, holding its full content rendered recursively. 2258 for (direct.items) |id| { 2259 const child = focus.children.get(id) orelse continue; 2260 const info = child.focus.scroll orelse continue; 2261 const r = child.rect; 2262 // overflow only on the axes the widget scrolls; `auto` shows a bar only 2263 // when that axis actually overflows. the other axis is clipped (hidden), 2264 // matching how the terminal Scroll handles its non-scrolling axis. 2265 const overflow = switch (info.direction) { 2266 .vert => "overflow-x:hidden;overflow-y:auto", 2267 .horiz => "overflow-x:auto;overflow-y:hidden", 2268 .both => "overflow:auto", 2269 }; 2270 // the id carries a content version so JS preserves the native scroll 2271 // position across re-renders of the same content but resets it when the 2272 // content is replaced — e.g. selecting a different commit. the widget's 2273 // scroll offset (in cells) rides along so JS can apply it when it has no 2274 // preserved position, letting a wasm-side scrollToRect (the files list 2275 // scrolling to its selected row on page load) reach the browser. 2276 var buf: [256]u8 = undefined; 2277 try output.appendSlice(allocator, try std.fmt.bufPrint(&buf, "<div class=\"scroll\" data-key=\"scroll:{d}\" data-scroll-id=\"{d}-{d}\" data-scroll-direction=\"{s}\" data-scroll-x=\"{d}\" data-scroll-y=\"{d}\" style=\"left:{d}ch;top:{d}em;width:{d}ch;height:{d}em;{s}\">", .{ id, id, child.focus.version, @tagName(info.direction), info.offset_x, info.offset_y, r.x, r.y, r.size.width, r.size.height, overflow })); 2278 try renderPanel(allocator, output, child.focus, info.content, session, root_focus); 2279 try output.appendSlice(allocator, "</div>"); 2280 } 2281 } 2282 2283 const form_prefix = "form:"; 2284 const form_id_prefix = "haxy-form-"; 2285 2286 fn formAction(focus: *const Focus) ?[]const u8 { 2287 return switch (focus.kind) { 2288 .custom => |custom| if (std.mem.startsWith(u8, custom, form_prefix)) custom[form_prefix.len..] else null, 2289 else => null, 2290 }; 2291 } 2292 2293 // find the form ancestor of a flattened focus-tree child. html's `form` 2294 // attribute then associates the control with that form without requiring the 2295 // form and control to share a DOM parent. 2296 fn formOwner(root_focus: *Focus, focus_id: usize) ?usize { 2297 var id = focus_id; 2298 while (root_focus.children.get(id)) |child| { 2299 const parent_id = child.parent_id; 2300 if (parent_id == root_focus.id) return if (formAction(root_focus) != null) root_focus.id else null; 2301 const parent = root_focus.children.get(parent_id) orelse return null; 2302 if (formAction(parent.focus) != null) return parent_id; 2303 id = parent_id; 2304 } 2305 return null; 2306 } 2307 2308 fn appendFormAttribute(allocator: std.mem.Allocator, output: *std.ArrayList(u8), root_focus: *Focus, focus_id: usize) !void { 2309 const form_id = formOwner(root_focus, focus_id) orelse return; 2310 var buf: [64]u8 = undefined; 2311 try output.appendSlice(allocator, try std.fmt.bufPrint(&buf, " form=\"" ++ form_id_prefix ++ "{d}\"", .{form_id})); 2312 } 2313 2314 fn renderPanelControls( 2315 allocator: std.mem.Allocator, 2316 output: *std.ArrayList(u8), 2317 focus: *Focus, 2318 session: *ui.Session, 2319 root_focus: *Focus, 2320 excluded: *const std.AutoHashMapUnmanaged(usize, void), 2321 ) !void { 2322 var iter = focus.children.iterator(); 2323 while (iter.next()) |entry| { 2324 const id = entry.key_ptr.*; 2325 if (excluded.contains(id)) continue; 2326 const child = entry.value_ptr.*; 2327 const r = child.rect; 2328 2329 if (r.size.width == 0 or r.size.height == 0) continue; // not laid out, rather than merely off-screen 2330 2331 switch (child.focus.kind) { 2332 .text_input, .text_input_password, .text_area => { 2333 const ti = session.text_inputs.get(id) orelse continue; 2334 2335 const inner_left = r.x + 1; 2336 const inner_top = r.y + 1; 2337 const inner_width = if (r.size.width > 2) r.size.width - 2 else 0; 2338 const preserve = !ti.options.read_only; 2339 2340 if (child.focus.kind == .text_area) { 2341 const value = try ti.text(allocator); 2342 defer allocator.free(value); 2343 var id_buf: [128]u8 = undefined; 2344 try output.appendSlice(allocator, try std.fmt.bufPrint(&id_buf, "<textarea data-key=\"control:{d}\" data-focus-id=\"{d}\"", .{ id, id })); 2345 if (preserve) try output.appendSlice(allocator, " data-preserve-value") else try output.appendSlice(allocator, " readonly"); 2346 try appendFormAttribute(allocator, output, root_focus, id); 2347 if (ti.options.name.len > 0) { 2348 try output.appendSlice(allocator, " name=\""); 2349 try appendEscapedHtml(allocator, output, ti.options.name); 2350 try output.append(allocator, '"'); 2351 } 2352 const inner_height = if (r.size.height > 2) r.size.height - 2 else 0; 2353 var pos_buf: [128]u8 = undefined; 2354 try output.appendSlice(allocator, try std.fmt.bufPrint(&pos_buf, " style=\"left:{d}ch;top:{d}em;width:{d}ch;height:{d}em\">\n", .{ inner_left, inner_top, inner_width, inner_height })); 2355 try appendEscapedHtml(allocator, output, value); 2356 try output.appendSlice(allocator, "</textarea>"); 2357 continue; 2358 } 2359 2360 var id_buf: [160]u8 = undefined; 2361 try output.appendSlice(allocator, try std.fmt.bufPrint(&id_buf, "<input type=\"{s}\" data-key=\"control:{d}\" data-focus-id=\"{d}\"", .{ if (child.focus.kind == .text_input_password) "password" else "text", id, id })); 2362 if (preserve) try output.appendSlice(allocator, " data-preserve-value") else try output.appendSlice(allocator, " readonly"); 2363 try appendFormAttribute(allocator, output, root_focus, id); 2364 if (ti.options.name.len > 0) { 2365 try output.appendSlice(allocator, " name=\""); 2366 try appendEscapedHtml(allocator, output, ti.options.name); 2367 try output.append(allocator, '"'); 2368 } 2369 if (child.focus.kind != .text_input_password) { 2370 const value = try ti.text(allocator); 2371 defer allocator.free(value); 2372 try output.appendSlice(allocator, " value=\""); 2373 try appendEscapedHtml(allocator, output, value); 2374 try output.append(allocator, '"'); 2375 } 2376 var pos_buf: [96]u8 = undefined; 2377 try output.appendSlice(allocator, try std.fmt.bufPrint(&pos_buf, " style=\"left:{d}ch;top:{d}em;width:{d}ch;height:1em\">", .{ inner_left, inner_top, inner_width })); 2378 }, 2379 .custom => |custom| { 2380 if (std.mem.eql(u8, custom, "submit") or std.mem.startsWith(u8, custom, ui.submit_action_prefix)) { 2381 if (formOwner(root_focus, id) == null) continue; 2382 var id_buf: [128]u8 = undefined; 2383 try output.appendSlice(allocator, try std.fmt.bufPrint(&id_buf, "<button type=\"submit\" data-key=\"control:{d}\" data-focus-id=\"{d}\"", .{ id, id })); 2384 try appendFormAttribute(allocator, output, root_focus, id); 2385 if (std.mem.startsWith(u8, custom, ui.submit_action_prefix)) { 2386 try output.appendSlice(allocator, " formaction=\""); 2387 try appendEscapedHtml(allocator, output, custom[ui.submit_action_prefix.len..]); 2388 try output.append(allocator, '"'); 2389 } 2390 var pos_buf: [128]u8 = undefined; 2391 try output.appendSlice(allocator, try std.fmt.bufPrint(&pos_buf, " style=\"left:{d}ch;top:{d}em;width:{d}ch;height:{d}em\"></button>", .{ r.x, r.y, r.size.width, r.size.height })); 2392 } else if (std.mem.startsWith(u8, custom, ui.radio_prefix)) { 2393 // an invisible native radio over the option, checked when the option is its row's selection 2394 const field = custom[ui.radio_prefix.len..]; 2395 const separator = std.mem.indexOfScalar(u8, field, '=') orelse continue; 2396 const row = root_focus.children.get(child.parent_id) orelse continue; 2397 var id_buf: [128]u8 = undefined; 2398 try output.appendSlice(allocator, try std.fmt.bufPrint(&id_buf, "<input type=\"radio\" data-key=\"control:{d}\" data-focus-id=\"{d}\"", .{ id, id })); 2399 try appendFormAttribute(allocator, output, root_focus, id); 2400 try output.appendSlice(allocator, " name=\""); 2401 try appendEscapedHtml(allocator, output, field[0..separator]); 2402 try output.appendSlice(allocator, "\" value=\""); 2403 try appendEscapedHtml(allocator, output, field[separator + 1 ..]); 2404 try output.append(allocator, '"'); 2405 if (row.focus.child_id == id) try output.appendSlice(allocator, " checked"); 2406 var pos_buf: [128]u8 = undefined; 2407 try output.appendSlice(allocator, try std.fmt.bufPrint(&pos_buf, " style=\"opacity:0;left:{d}ch;top:{d}em;width:{d}ch;height:{d}em\">", .{ r.x, r.y, r.size.width, r.size.height })); 2408 } else if (std.mem.startsWith(u8, custom, ui.file_input_prefix)) { 2409 try output.appendSlice(allocator, "<input type=\"file\" data-preserve-value data-action=\""); 2410 try appendEscapedHtml(allocator, output, custom[ui.file_input_prefix.len..]); 2411 var id_buf: [128]u8 = undefined; 2412 try output.appendSlice(allocator, try std.fmt.bufPrint(&id_buf, "\" data-key=\"control:{d}\" data-focus-id=\"{d}\" style=\"opacity:0;left:{d}ch;top:{d}em;width:{d}ch;height:{d}em\">", .{ id, id, r.x, r.y, r.size.width, r.size.height })); 2413 } 2414 }, 2415 else => {}, 2416 } 2417 } 2418 } 2419 2420 // emit hidden form owners beside the rendered panels. their controls point 2421 // back here with the standard HTML `form` attribute. 2422 fn renderForms(allocator: std.mem.Allocator, output: *std.ArrayList(u8), root_focus: *Focus) !void { 2423 // the focus child map preserves insertion order, which matches the order 2424 // widgets were added in code 2425 var iter = root_focus.children.iterator(); 2426 while (iter.next()) |entry| { 2427 const child = entry.value_ptr.*; 2428 const action_url = formAction(child.focus) orelse continue; 2429 2430 try output.appendSlice(allocator, "<form hidden data-key=\"form:"); 2431 var id_buf: [96]u8 = undefined; 2432 try output.appendSlice(allocator, try std.fmt.bufPrint(&id_buf, "{d}\" id=\"" ++ form_id_prefix ++ "{d}\" action=\"", .{ entry.key_ptr.*, entry.key_ptr.* })); 2433 try appendEscapedHtml(allocator, output, action_url); 2434 try output.appendSlice(allocator, "\" method=\"post\"></form>"); 2435 } 2436 } 2437 2438 // the 16 ansi colors as the browser shows them (xterm's defaults) 2439 const ansi_palette = [16]Grid.Color.Rgb{ 2440 .{ .r = 0x00, .g = 0x00, .b = 0x00 }, .{ .r = 0xcd, .g = 0x00, .b = 0x00 }, .{ .r = 0x00, .g = 0xcd, .b = 0x00 }, .{ .r = 0xcd, .g = 0xcd, .b = 0x00 }, 2441 .{ .r = 0x00, .g = 0x00, .b = 0xee }, .{ .r = 0xcd, .g = 0x00, .b = 0xcd }, .{ .r = 0x00, .g = 0xcd, .b = 0xcd }, .{ .r = 0xe5, .g = 0xe5, .b = 0xe5 }, 2442 .{ .r = 0x7f, .g = 0x7f, .b = 0x7f }, .{ .r = 0xff, .g = 0x00, .b = 0x00 }, .{ .r = 0x00, .g = 0xff, .b = 0x00 }, .{ .r = 0xff, .g = 0xff, .b = 0x00 }, 2443 .{ .r = 0x5c, .g = 0x5c, .b = 0xff }, .{ .r = 0xff, .g = 0x00, .b = 0xff }, .{ .r = 0x00, .g = 0xff, .b = 0xff }, .{ .r = 0xff, .g = 0xff, .b = 0xff }, 2444 }; 2445 2446 // resolve any color to rgb: palette colors through the ansi table and the 2447 // xterm 256-color layout (16 ansi, a 6x6x6 cube, then 24 grays) 2448 fn colorRgb(color: Grid.Color) Grid.Color.Rgb { 2449 return switch (color) { 2450 .rgb => |c| c, 2451 .ansi => |a| ansi_palette[@intFromEnum(a)], 2452 .indexed => |n| if (n < 16) 2453 ansi_palette[n] 2454 else if (n < 232) blk: { 2455 const levels = [6]u8{ 0, 0x5f, 0x87, 0xaf, 0xd7, 0xff }; 2456 const i = n - 16; 2457 break :blk .{ .r = levels[i / 36], .g = levels[(i / 6) % 6], .b = levels[i % 6] }; 2458 } else blk: { 2459 const v: u8 = 8 + (n - 232) * 10; 2460 break :blk .{ .r = v, .g = v, .b = v }; 2461 }, 2462 }; 2463 } 2464 2465 // builds an HTML ` style="color:…;background-color:…"` attribute from a 2466 // cell's style into `buf`, omitting whichever color is unset. an inverted 2467 // cell swaps the two, falling back to the page's --fg/--bg variables for 2468 // whichever side is unset. text attributes follow the colors. returns an 2469 // empty slice when nothing is set. 2470 fn styleAttr(buf: []u8, style: Grid.Style) []const u8 { 2471 if (style.eql(.{})) return buf[0..0]; 2472 const prefix = " style=\""; 2473 @memcpy(buf[0..prefix.len], prefix); 2474 var i: usize = prefix.len; 2475 const inverted = style.inverted; 2476 i = cssColor(buf, i, "color", if (inverted) style.bg else style.fg, if (inverted) "var(--bg)" else null) orelse return buf[0..0]; 2477 i = cssColor(buf, i, "background-color", if (inverted) style.fg else style.bg, if (inverted) "var(--fg)" else null) orelse return buf[0..0]; 2478 const decoration: []const u8 = if (style.underline and style.strikethrough) 2479 "text-decoration:underline line-through;" 2480 else if (style.underline) 2481 "text-decoration:underline;" 2482 else if (style.strikethrough) 2483 "text-decoration:line-through;" 2484 else 2485 ""; 2486 const attributes = std.fmt.bufPrint(buf[i..], "{s}{s}{s}{s}", .{ 2487 if (style.bold) "font-weight:bold;" else "", 2488 if (style.italic) "font-style:italic;" else "", 2489 decoration, 2490 if (style.dim) "opacity:.6;" else "", 2491 }) catch return buf[0..0]; 2492 i += attributes.len; 2493 if (i >= buf.len) return buf[0..0]; 2494 buf[i] = '"'; 2495 return buf[0 .. i + 1]; 2496 } 2497 2498 // append `prop:value;` at buf[i..] for the color, or for the fallback when 2499 // the color is unset (nothing when both are). returns the new end, or null 2500 // when it doesn't fit. 2501 fn cssColor(buf: []u8, i: usize, prop: []const u8, color: ?Grid.Color, fallback: ?[]const u8) ?usize { 2502 const s = if (color) |c| blk: { 2503 const v = colorRgb(c); 2504 break :blk std.fmt.bufPrint(buf[i..], "{s}:#{x:0>2}{x:0>2}{x:0>2};", .{ prop, v.r, v.g, v.b }) catch return null; 2505 } else if (fallback) |f| 2506 std.fmt.bufPrint(buf[i..], "{s}:{s};", .{ prop, f }) catch return null 2507 else 2508 return i; 2509 return i + s.len; 2510 } 2511 2512 // a cell's link as an href, when it's a web or mail url 2513 fn webLink(link: ?[]const u8) ?[]const u8 { 2514 const url = link orelse return null; 2515 for ([_][]const u8{ "http://", "https://", "mailto:" }) |scheme| { 2516 if (std.ascii.startsWithIgnoreCase(url, scheme)) return url; 2517 } 2518 return null; 2519 } 2520 2521 fn sameLink(a: ?[]const u8, b: ?[]const u8) bool { 2522 if (a) |x| return if (b) |y| std.mem.eql(u8, x, y) else false; 2523 return b == null; 2524 } 2525 2526 fn appendEscapedHtml(allocator: std.mem.Allocator, out: *std.ArrayList(u8), input: []const u8) !void { 2527 for (input) |ch| { 2528 switch (ch) { 2529 '&' => try out.appendSlice(allocator, "&amp;"), 2530 '<' => try out.appendSlice(allocator, "&lt;"), 2531 '>' => try out.appendSlice(allocator, "&gt;"), 2532 '"' => try out.appendSlice(allocator, "&quot;"), 2533 '\'' => try out.appendSlice(allocator, "&#39;"), 2534 else => try out.append(allocator, ch), 2535 } 2536 } 2537 } 2538 2539 // --- helpers -------------------------------------------------------------- 2540 2541 fn getCookieValue(request: *std.http.Server.Request, name: []const u8) ?[]const u8 { 2542 var iter = request.iterateHeaders(); 2543 while (iter.next()) |header| { 2544 if (!std.ascii.eqlIgnoreCase(header.name, "cookie")) continue; 2545 var pairs = std.mem.splitScalar(u8, header.value, ';'); 2546 while (pairs.next()) |pair| { 2547 const trimmed = std.mem.trim(u8, pair, " \t"); 2548 const eq = std.mem.indexOfScalar(u8, trimmed, '=') orelse continue; 2549 if (std.mem.eql(u8, trimmed[0..eq], name)) { 2550 return trimmed[eq + 1 ..]; 2551 } 2552 } 2553 } 2554 return null; 2555 } 2556 2557 fn parseFormField(allocator: std.mem.Allocator, body: []const u8, key: []const u8) !?[]u8 { 2558 var iter = std.mem.splitScalar(u8, body, '&'); 2559 while (iter.next()) |pair| { 2560 const eq = std.mem.indexOfScalar(u8, pair, '=') orelse continue; 2561 if (std.mem.eql(u8, pair[0..eq], key)) { 2562 return try decodeFormValue(allocator, pair[eq + 1 ..]); 2563 } 2564 } 2565 return null; 2566 } 2567 2568 fn readFormBody(request: *std.http.Server.Request, allocator: std.mem.Allocator) ![]u8 { 2569 var buffer: [256]u8 = undefined; 2570 return request.readerExpectNone(&buffer).allocRemaining(allocator, .limited(65536)); 2571 } 2572 2573 fn decodeFormValue(allocator: std.mem.Allocator, encoded: []const u8) ![]u8 { 2574 var out: std.ArrayList(u8) = .empty; 2575 errdefer out.deinit(allocator); 2576 var i: usize = 0; 2577 while (i < encoded.len) : (i += 1) { 2578 switch (encoded[i]) { 2579 '+' => try out.append(allocator, ' '), 2580 '%' => { 2581 if (i + 2 >= encoded.len) return error.InvalidPercentEncoding; 2582 const hi = std.fmt.charToDigit(encoded[i + 1], 16) catch return error.InvalidPercentEncoding; 2583 const lo = std.fmt.charToDigit(encoded[i + 2], 16) catch return error.InvalidPercentEncoding; 2584 try out.append(allocator, hi * 16 + lo); 2585 i += 2; 2586 }, 2587 else => try out.append(allocator, encoded[i]), 2588 } 2589 } 2590 return try out.toOwnedSlice(allocator); 2591 } 2592 2593 // disk-backed web session store. each login mints a random, opaque token 2594 // (not the user's id) that is stored as a file named by the token hex, whose 2595 // contents are the raw user_id bytes. authenticating a request is a lookup of 2596 // the cookie's token; logout deletes the file, revoking the session. there is 2597 // deliberately no expiry — a session lives until logout. form failures use 2598 // files in the flash subdirectory that the redirected GET consumes. the 2599 // directory is cleared whenever the server starts. 2600 pub const SessionStore = struct { 2601 io: std.Io, 2602 dir: std.Io.Dir, 2603 flash_dir: std.Io.Dir, 2604 auto_login: ?[token_hex_len]u8, 2605 2606 pub const token_hex_len = evt.event_id_size * 2; 2607 2608 pub fn init(io: std.Io, data_dir: std.Io.Dir) !SessionStore { 2609 try data_dir.createDirPath(io, "sessions"); 2610 const dir = try data_dir.openDir(io, "sessions", .{}); 2611 errdefer dir.close(io); 2612 try dir.deleteTree(io, "flash"); 2613 try dir.createDirPath(io, "flash"); 2614 const flash_dir = try dir.openDir(io, "flash", .{}); 2615 errdefer flash_dir.close(io); 2616 const auto_login = blk: { 2617 const file = dir.openFile(io, auto_login_name, .{ .mode = .read_only }) catch break :blk null; 2618 defer file.close(io); 2619 var token: [token_hex_len]u8 = undefined; 2620 var storage: [token_hex_len]u8 = undefined; 2621 var reader = file.reader(io, &storage); 2622 reader.interface.readSliceAll(&token) catch break :blk null; 2623 break :blk token; 2624 }; 2625 return .{ .io = io, .dir = dir, .flash_dir = flash_dir, .auto_login = auto_login }; 2626 } 2627 2628 pub fn deinit(self: SessionStore) void { 2629 self.flash_dir.close(self.io); 2630 self.dir.close(self.io); 2631 } 2632 2633 // mint a new session for user_id, returning the token hex to set as the 2634 // cookie value. 2635 pub fn create(self: SessionStore, user_id: *const [evt.event_id_size]u8) ![token_hex_len]u8 { 2636 var token: [evt.event_id_size]u8 = undefined; 2637 self.io.random(&token); 2638 const token_hex = std.fmt.bytesToHex(token, .lower); 2639 const file = try self.dir.createFile(self.io, &token_hex, .{}); 2640 defer file.close(self.io); 2641 try file.writeStreamingAll(self.io, user_id); 2642 return token_hex; 2643 } 2644 2645 fn createFlash(self: SessionStore, allocator: std.mem.Allocator, value: ui.Session.FormFeedback) ![token_hex_len]u8 { 2646 var token: [evt.event_id_size]u8 = undefined; 2647 self.io.random(&token); 2648 const token_hex = std.fmt.bytesToHex(token, .lower); 2649 const file = try self.flash_dir.createFile(self.io, &token_hex, .{}); 2650 errdefer self.flash_dir.deleteFile(self.io, &token_hex) catch {}; 2651 defer file.close(self.io); 2652 2653 var json: std.Io.Writer.Allocating = .init(allocator); 2654 defer json.deinit(); 2655 try std.json.Stringify.value(value, .{}, &json.writer); 2656 try file.writeStreamingAll(self.io, json.written()); 2657 return token_hex; 2658 } 2659 2660 fn takeFlash(self: SessionStore, allocator: std.mem.Allocator, token_hex: []const u8) ?ui.Session.FormFeedback { 2661 if (!isToken(token_hex)) return null; 2662 const file = self.flash_dir.openFile(self.io, token_hex, .{ .mode = .read_only }) catch return null; 2663 defer self.flash_dir.deleteFile(self.io, token_hex) catch {}; 2664 defer file.close(self.io); 2665 2666 var storage: [4096]u8 = undefined; 2667 var reader = file.reader(self.io, &storage); 2668 const bytes = reader.interface.allocRemaining(allocator, .limited(512 * 1024)) catch return null; 2669 return std.json.parseFromSliceLeaky(ui.Session.FormFeedback, allocator, bytes, .{}) catch null; 2670 } 2671 2672 // resolve a cookie's token to its user_id. returns false (logged out) for a 2673 // missing, malformed, or unknown token. 2674 pub fn lookup(self: SessionStore, token_hex: []const u8, out: *[evt.event_id_size]u8) bool { 2675 if (!isToken(token_hex)) return false; 2676 const file = self.dir.openFile(self.io, token_hex, .{ .mode = .read_only }) catch return false; 2677 defer file.close(self.io); 2678 var storage: [evt.event_id_size]u8 = undefined; 2679 var file_reader = file.reader(self.io, &storage); 2680 file_reader.interface.readSliceAll(out) catch return false; 2681 return true; 2682 } 2683 2684 // revoke a session. a no-op for a missing or malformed token. 2685 pub fn remove(self: SessionStore, token_hex: []const u8) void { 2686 if (!isToken(token_hex)) return; 2687 self.dir.deleteFile(self.io, token_hex) catch {}; 2688 } 2689 2690 // leave `token_hex`'s session for visitors arriving without one. only the 2691 // `try` fixture writes one. the name can't collide with a session token. 2692 pub fn offerAutoLogin(self: SessionStore, token_hex: *const [token_hex_len]u8) !void { 2693 const file = try self.dir.createFile(self.io, auto_login_name, .{}); 2694 defer file.close(self.io); 2695 try file.writeStreamingAll(self.io, token_hex); 2696 } 2697 2698 pub fn autoLogin(self: SessionStore, out: *[token_hex_len]u8) bool { 2699 out.* = self.auto_login orelse return false; 2700 return true; 2701 } 2702 2703 const auto_login_name = "auto-login"; 2704 2705 // a token is exactly token_hex_len hex chars. validating before using the 2706 // value as a path keeps attacker-supplied cookies from escaping the 2707 // sessions dir (e.g. via "/" or ".." bytes). 2708 fn isToken(token_hex: []const u8) bool { 2709 if (token_hex.len != token_hex_len) return false; 2710 for (token_hex) |c| if (!std.ascii.isHex(c)) return false; 2711 return true; 2712 } 2713 }; 2714