╭─────────────╮ │scroll to top│ ╰─────────────╯ ╭ web.zig ──────────────────────────────────────────────────────╮ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ ╰───────────────────────────────────────────────────────────────╯
🬐 🬠 🬞🬂🬏 🬟 🬑 🬟 🬑 ╭d8748222..╮ d8748222.. haxy: 🬋🬋🬋 🬋🬋🬋 🬋 🬋 │files │ commits refs discuss issues patches new login 🬐 🬠 🬐 🬠 🬑 🬟 🬰 ╰──────────╯ (685) 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 notify.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 │ ╰─────────────────────────────────╯
2890 2891 pub const token_hex_len = evt.event_id_size * 2; 2892 2893 pub fn init(io: std.Io, data_dir: std.Io.Dir) !SessionStore { 2894 try data_dir.createDirPath(io, "sessions"); 2895 const dir = try data_dir.openDir(io, "sessions", .{}); 2896 errdefer dir.close(io); 2897 try dir.deleteTree(io, "flash"); 2898 try dir.createDirPath(io, "flash"); 2899 const flash_dir = try dir.openDir(io, "flash", .{}); 2900 errdefer flash_dir.close(io); 2901 const auto_login = blk: { 2902 const file = dir.openFile(io, auto_login_name, .{ .mode = .read_only }) catch break :blk null; 2903 defer file.close(io); 2904 var token: [token_hex_len]u8 = undefined; 2905 var storage: [token_hex_len]u8 = undefined; 2906 var reader = file.reader(io, &storage); 2907 reader.interface.readSliceAll(&token) catch break :blk null; 2908 break :blk token; 2909 }; 2910 return .{ .io = io, .dir = dir, .flash_dir = flash_dir, .auto_login = auto_login }; 2911 } 2912 2913 pub fn deinit(self: SessionStore) void { 2914 self.flash_dir.close(self.io); 2915 self.dir.close(self.io); 2916 } 2917 2918 // mint a new session for user_id, returning the token hex to set as the 2919 // cookie value. 2920 pub fn create(self: SessionStore, user_id: *const [evt.event_id_size]u8) ![token_hex_len]u8 { 2921 var token: [evt.event_id_size]u8 = undefined; 2922 self.io.random(&token); 2923 const token_hex = std.fmt.bytesToHex(token, .lower); 2924 const file = try self.dir.createFile(self.io, &token_hex, .{}); 2925 defer file.close(self.io); 2926 try file.writeStreamingAll(self.io, user_id); 2927 return token_hex; 2928 } 2929 2930 fn createFlash(self: SessionStore, allocator: std.mem.Allocator, value: ui.Session.FormFeedback) ![token_hex_len]u8 { 2931 var token: [evt.event_id_size]u8 = undefined; 2932 self.io.random(&token); 2933 const token_hex = std.fmt.bytesToHex(token, .lower); 2934 const file = try self.flash_dir.createFile(self.io, &token_hex, .{}); 2935 errdefer self.flash_dir.deleteFile(self.io, &token_hex) catch {}; 2936 defer file.close(self.io); 2937 2938 var json: std.Io.Writer.Allocating = .init(allocator); 2939 defer json.deinit(); 2940 try std.json.Stringify.value(value, .{}, &json.writer); 2941 try file.writeStreamingAll(self.io, json.written()); 2942 return token_hex; 2943 } 2944 2945 fn takeFlash(self: SessionStore, allocator: std.mem.Allocator, token_hex: []const u8) ?ui.Session.FormFeedback { 2946 if (!isToken(token_hex)) return null; 2947 const file = self.flash_dir.openFile(self.io, token_hex, .{ .mode = .read_only }) catch return null; 2948 defer self.flash_dir.deleteFile(self.io, token_hex) catch {}; 2949 defer file.close(self.io); 2950 2951 var storage: [4096]u8 = undefined; 2952 var reader = file.reader(self.io, &storage); 2953 const bytes = reader.interface.allocRemaining(allocator, .limited(512 * 1024)) catch return null; 2954 return std.json.parseFromSliceLeaky(ui.Session.FormFeedback, allocator, bytes, .{}) catch null; 2955 } 2956 2957 // resolve a cookie's token to its user_id. returns false (logged out) for a 2958 // missing, malformed, or unknown token. 2959 pub fn lookup(self: SessionStore, token_hex: []const u8, out: *[evt.event_id_size]u8) bool { 2960 if (!isToken(token_hex)) return false; 2961 const file = self.dir.openFile(self.io, token_hex, .{ .mode = .read_only }) catch return false; 2962 defer file.close(self.io); 2963 var storage: [evt.event_id_size]u8 = undefined; 2964 var file_reader = file.reader(self.io, &storage); 2965 file_reader.interface.readSliceAll(out) catch return false; 2966 return true; 2967 } 2968 2969 // revoke a session. a no-op for a missing or malformed token. 2970 pub fn remove(self: SessionStore, token_hex: []const u8) void { 2971 if (!isToken(token_hex)) return; 2972 self.dir.deleteFile(self.io, token_hex) catch {}; 2973 } 2974 2975 // leave `token_hex`'s session for visitors arriving without one. only the 2976 // `try` fixture writes one. the name can't collide with a session token. 2977 pub fn offerAutoLogin(self: SessionStore, token_hex: *const [token_hex_len]u8) !void { 2978 const file = try self.dir.createFile(self.io, auto_login_name, .{}); 2979 defer file.close(self.io); 2980 try file.writeStreamingAll(self.io, token_hex); 2981 } 2982 2983 pub fn autoLogin(self: SessionStore, out: *[token_hex_len]u8) bool { 2984 out.* = self.auto_login orelse return false; 2985 return true; 2986 } 2987 2988 const auto_login_name = "auto-login"; 2989 2990 // a token is exactly token_hex_len hex chars. validating before using the 2991 // value as a path keeps attacker-supplied cookies from escaping the 2992 // sessions dir (e.g. via "/" or ".." bytes). 2993 fn isToken(token_hex: []const u8) bool { 2994 if (token_hex.len != token_hex_len) return false; 2995 for (token_hex) |c| if (!std.ascii.isHex(c)) return false; 2996 return true; 2997 } 2998 }; 2999