cleanup optional request headers

src/browser/page.zig

@@ -472,6 +472,7 @@ pub const Page = struct {
             .url = owned_url,
             .method = opts.method,
             .body = opts.body,
+            .header = opts.header,
             .cookie = self.requestCookie(.{ .is_navigation = true }),
             .header_done_callback = pageHeaderDoneCallback,
             .data_callback = pageDataCallback,
@@ -931,6 +932,8 @@ pub const Page = struct {
         if (std.ascii.eqlIgnoreCase(method, "post")) {
             opts.method = .POST;
             opts.body = buf.items;
+            // form_data.write currently only supports this encoding, so we know this has to be the content type
+            opts.header = "Content-Type: application/x-www-form-urlencoded";
         } else {
             action = try URL.concatQueryString(transfer_arena, action, buf.items);
         }
@@ -986,6 +989,7 @@ pub const NavigateOpts = struct {
     reason: NavigateReason = .address_bar,
     method: HttpClient.Method = .GET,
     body: ?[]const u8 = null,
+    header: ?[:0]const u8 = null,
 };
 
 fn timestamp() u32 {

src/browser/storage/cookie.zig

@@ -12,6 +12,7 @@ pub const LookupOpts = struct {
     origin_uri: ?*const Uri = null,
     is_http: bool,
     is_navigation: bool = true,
+    prefix: ?[]const u8 = null,
 };
 
 pub const Jar = struct {
@@ -91,10 +92,15 @@ pub const Jar = struct {
 
         var first = true;
         for (self.cookies.items) |*cookie| {
-            if (!cookie.appliesTo(&target, same_site, opts.is_navigation, opts.is_http)) continue;
+            if (!cookie.appliesTo(&target, same_site, opts.is_navigation, opts.is_http)) {
+                continue;
+            }
 
             // we have a match!
             if (first) {
+                if (opts.prefix) |prefix| {
+                    try writer.writeAll(prefix);
+                }
                 first = false;
             } else {
                 try writer.writeAll("; ");

src/browser/xhr/xhr.zig

@@ -375,7 +375,6 @@ pub const XMLHttpRequest = struct {
             .url = self.url.?,
             .method = self.method,
             .body = self.request_body,
-            .content_type = "Content-Type: text/plain; charset=UTF-8", // @newhttp TODO
             .cookie = page.requestCookie(.{}),
             .start_callback = httpStartCallback,
             .header_callback = httpHeaderCallback,

src/http/Client.zig

@@ -263,24 +263,21 @@ fn makeRequest(self: *Client, handle: *Handle, req: Request) !void {
         var header_list = conn.commonHeaders();
         errdefer c.curl_slist_free_all(header_list);
 
-        if (req.content_type) |ct| {
-            header_list = c.curl_slist_append(header_list, ct);
+        if (req.header) |hdr| {
+            header_list = c.curl_slist_append(header_list, hdr);
         }
 
         {
-            const COOKIE_HEADER = "Cookie: ";
             const aa = self.arena.allocator();
-            defer _ = self.arena.reset(.{ .retain_with_limit = 2048 });
-
             var arr: std.ArrayListUnmanaged(u8) = .{};
-            try arr.appendSlice(aa, COOKIE_HEADER);
             try req.cookie.forRequest(&uri, arr.writer(aa));
 
-            if (arr.items.len > COOKIE_HEADER.len) {
+            if (arr.items.len > 0) {
                 try arr.append(aa, 0); //null terminate
 
                 // copies the value
                 header_list = c.curl_slist_append(header_list, @ptrCast(arr.items.ptr));
+                defer _ = self.arena.reset(.{ .retain_with_limit = 2048 });
             }
         }
 
@@ -485,6 +482,7 @@ pub const RequestCookie = struct {
             .is_http = self.is_http,
             .is_navigation = self.is_navigation,
             .origin_uri = self.origin,
+            .prefix = "Cookie: ",
         });
     }
 };
@@ -493,7 +491,7 @@ pub const Request = struct {
     method: Method,
     url: [:0]const u8,
     body: ?[]const u8 = null,
-    content_type: ?[:0]const u8 = null,
+    header: ?[:0]const u8 = null,
     cookie: RequestCookie,
 
     // arbitrary data that can be associated with this request