Switch to CGI comments

4 files changed, 104 insertions, 33 deletions

diff --git a/zig-comments/comments.service b/zig-comments/comments.service
deleted file mode 100644
index 7d8f0e5..0000000
--- a/zig-comments/comments.service
+++ /dev/null
@@ -1,12 +0,0 @@
-[Unit]
-Description=Comments service
-After=postgres.service
-
-[Service]
-User=comments
-ExecStart=/usr/local/bin/comments
-Restart=on-failure
-EnvironmentFile=/etc/sysconfig/comments
-
-[Install]
-WantedBy=multi-user.target
diff --git a/zig-comments/lib/zigwebserver b/zig-comments/lib/zigwebserver
-Subproject 17d8cc65fe6396d505dda6bf162942cab9e0040
+Subproject 0736c8a26dbd970670117290baf4a68e430aeca
diff --git a/zig-comments/src/main.zig b/zig-comments/src/main.zig
index b8b820c..898b689 100644
--- a/zig-comments/src/main.zig
+++ b/zig-comments/src/main.zig
@@ -5,7 +5,35 @@ const mustache = @import("mustache");
 
 const Params = zws.Params;
 
-const Err = error{ Overflow, InvalidCharacter, StreamTooLong, ColumnNotFound } || pq.PqError || std.http.Server.Response.WaitError || std.http.Server.Response.DoError || std.http.Server.Response.ReadError || std.http.Server.Response.FinishError || zws.Path.ParseError;
+const Err = error{
+    Unexpected,
+    AccessDenied,
+    OutOfMemory,
+    InputOutput,
+    SystemResources,
+    IsDir,
+    OperationAborted,
+    BrokenPipe,
+    ConnectionResetByPeer,
+    ConnectionTimedOut,
+    NotOpenForReading,
+    NetNameDeleted,
+    WouldBlock,
+    StreamTooLong,
+    Malformatted,
+    InvalidLength,
+    InvalidCharacter,
+    NoSpaceLeft,
+    PqError,
+    ColumnNotFound,
+    DiskQuota,
+    FileTooBig,
+    DeviceBusy,
+    InvalidArgument,
+    NotOpenForWriting,
+    LockViolation,
+    InvalidRequestMethod,
+};
 const Ctx = struct {
     db: pq.Db,
     pub fn clone(self: @This()) Ctx {
@@ -19,8 +47,56 @@ const Ctx = struct {
 };
 
 var gpa = std.heap.GeneralPurposeAllocator(.{}){};
-const Rtr = zws.Router(Ctx, Err);
+const Request = struct {
+    method: std.http.Method,
+    target: []const u8,
+};
+const ResponseTransfer = union(enum) {
+    content_length: u64,
+    chunked: void,
+    none: void,
+};
+const Headers = struct {
+    const Entry = struct { key: []const u8, val: []const u8 };
+    _internal: std.ArrayList(Entry),
+
+    fn init(allocator: std.mem.Allocator) Headers {
+        return .{ ._internal = std.ArrayList(Entry).init(allocator) };
+    }
+    fn append(self: *@This(), key: []const u8, val: []const u8) !void {
+        try self._internal.append(.{ .key = key, .val = val });
+    }
+};
+const Response = struct {
+    allocator: std.mem.Allocator,
+    request: Request,
+    // TODO other fields and writer function to write headers and body to stdout
+    status: std.http.Status,
+    transfer_encoding: ResponseTransfer,
+    headers: Headers,
+    fn reader(_: @This()) std.fs.File.Reader {
+        return std.io.getStdIn().reader();
+    }
+    fn do(self: @This()) !void {
+        for (self.headers._internal.items) |tup| {
+            try std.io.getStdOut().writeAll(tup.key);
+            try std.io.getStdOut().writeAll(": ");
+            try std.io.getStdOut().writeAll(tup.val);
+            try std.io.getStdOut().writeAll("\r\n");
+        }
+        try std.io.getStdOut().writeAll("\r\n");
+    }
+    fn writer(_: @This()) std.fs.File.Writer {
+        return std.io.getStdOut().writer();
+    }
+    fn finish(_: @This()) !void {
+        // TODO Write empty lines? or just do nothing
+    }
+};
+
+const Rtr = zws.Router(*Response, Ctx, Err);
 const router = Rtr{
+    .allocator = gpa.allocator(),
     .handlers = &[_]Rtr.Handler{
         .{
             .method = .GET,
@@ -41,43 +117,51 @@ const router = Rtr{
     .notfound = notfound,
 };
 
+/// Run as a CGI program!
 pub fn main() !void {
+    const allocator = gpa.allocator();
     const db_url = std.os.getenv("DATABASE_URL") orelse "postgresql://comments@localhost/comments";
     var db = try pq.Db.init(db_url);
-    try db.exec(@embedFile("migrations/0_init.sql"));
-    try db.exec(@embedFile("migrations/1_capcha.sql"));
+    // try db.exec(@embedFile("migrations/0_init.sql"));
+    // try db.exec(@embedFile("migrations/1_capcha.sql"));
     defer db.deinit();
-    const server = zws.Server(Ctx, Rtr){
-        .allocator = gpa.allocator(),
-        .address = std.net.Address{ .in = std.net.Ip4Address.init(.{ 127, 0, 0, 1 }, 5678) },
-        .context = Ctx{ .db = db },
-        .handler = router,
+    const req = Request{
+        .method = std.meta.stringToEnum(std.http.Method, std.os.getenv("REQUEST_METHOD") orelse "GET") orelse {
+            return error.InvalidRequestMethod;
+        },
+        .target = std.os.getenv("REQUEST_URI") orelse "/",
     };
-
-    try server.serve();
+    var res = Response{
+        .allocator = allocator,
+        .request = req,
+        .status = .bad_request,
+        .transfer_encoding = .none,
+        .headers = Headers.init(allocator),
+    };
+    const ctx = Ctx{ .db = db };
+    try router.handle(&res, ctx);
 }
 
-fn notfound(res: *std.http.Server.Response, _: Ctx) Err!void {
+fn notfound(res: *Response, _: Ctx) Err!void {
     const rr = @embedFile("templates/notfound.html");
     try constresponse(res, rr, .not_found);
 }
 
-fn badrequest(res: *std.http.Server.Response, _: Ctx) Err!void {
+fn badrequest(res: *Response, _: Ctx) Err!void {
     const rr = @embedFile("templates/badrequest.html");
     try constresponse(res, rr, .bad_request);
 }
 
-fn constresponse(res: *std.http.Server.Response, rr: []const u8, status: std.http.Status) Err!void {
+fn constresponse(res: *Response, rr: []const u8, status: std.http.Status) Err!void {
     res.status = status;
     res.transfer_encoding = .{ .content_length = rr.len };
     try res.headers.append("content-type", "text/html");
     try res.do();
-    try res.writeAll(rr);
+    try res.writer().writeAll(rr);
     try res.finish();
 }
 
-fn get_comment(res: *std.http.Server.Response, ctx: Ctx, params: Params) Err!void {
-    _ = params;
+fn get_comment(res: *Response, ctx: Ctx, _: Params) Err!void {
     var p = try zws.Path.parse(res.allocator, res.request.target);
     defer p.deinit();
     const url: []const u8 = try p.get_query_param("url") orelse {
@@ -100,7 +184,6 @@ fn get_comment(res: *std.http.Server.Response, ctx: Ctx, params: Params) Err!voi
         const cmt = try stmt.read_struct(Comment);
         try comments.append(cmt);
     }
-    std.log.debug("found {} comments for url {s}", .{ comments.items.len, url });
 
     const rr = @embedFile("templates/comments.html");
     const tt = comptime mustache.parseComptime(rr, .{}, .{});
@@ -117,7 +200,7 @@ fn get_comment(res: *std.http.Server.Response, ctx: Ctx, params: Params) Err!voi
     try res.finish();
 }
 
-fn post_comment(res: *std.http.Server.Response, ctx: Ctx, _: Params) Err!void {
+fn post_comment(res: *Response, ctx: Ctx, _: Params) Err!void {
     var body_aa = std.ArrayList(u8).init(res.allocator);
     try res.reader().readAllArrayList(&body_aa, 1_000_000);
     var body = try body_aa.toOwnedSlice();
@@ -169,7 +252,7 @@ fn post_comment(res: *std.http.Server.Response, ctx: Ctx, _: Params) Err!void {
     try res.finish();
 }
 
-fn get_form(res: *std.http.Server.Response, ctx: Ctx, _: Params) Err!void {
+fn get_form(res: *Response, ctx: Ctx, _: Params) Err!void {
     var p = try zws.Path.parse(res.allocator, res.request.target);
     defer p.deinit();
     const url: []const u8 = try p.get_query_param("url") orelse {
diff --git a/zig-comments/src/templates/notfound.html b/zig-comments/src/templates/notfound.html
index 417e20d..795d262 100644
--- a/zig-comments/src/templates/notfound.html
+++ b/zig-comments/src/templates/notfound.html
@@ -1,4 +1,4 @@
-<doctype HTML>
+<!doctype HTML>
 <html>
 <body>
     <p>Not found!</p>