diff --git a/src/browser/HttpClient.zig b/src/browser/HttpClient.zig
index fffc38f8..650ab2b8 100644
--- a/src/browser/HttpClient.zig
+++ b/src/browser/HttpClient.zig
@@ -1110,19 +1110,8 @@ pub const Transfer = struct {
         }
 
         // Add cookies from cookie jar.
-        if (req.cookie_jar) |jar| {
-            const arena = self.arena.allocator();
-            var aw: std.Io.Writer.Allocating = .init(arena);
-            try jar.forRequest(req.url, &aw.writer, .{
-                .is_http = true,
-                .origin_url = req.url,
-                .is_navigation = req.resource_type == .document,
-            });
-            const written = aw.written();
-            if (written.len > 0) {
-                try aw.writer.writeByte(0);
-                try conn.setCookies(@ptrCast(written.ptr));
-            }
+        if (try self.getCookieString()) |cookies| {
+            try conn.setCookies(@ptrCast(cookies.ptr));
         }
 
         try conn.setPrivate(self);
@@ -1176,6 +1165,20 @@ pub const Transfer = struct {
         }
     }
 
+    pub fn getCookieString(self: *Transfer) !?[:0]const u8 {
+        const jar = self.req.cookie_jar orelse return null;
+        var aw: std.Io.Writer.Allocating = .init(self.arena.allocator());
+        try jar.forRequest(self.req.url, &aw.writer, .{
+            .is_http = true,
+            .origin_url = self.req.url,
+            .is_navigation = self.req.resource_type == .document,
+        });
+        const written = aw.written();
+        if (written.len == 0) return null;
+        try aw.writer.writeByte(0);
+        return written.ptr[0..written.len :0];
+    }
+
     pub fn format(self: *Transfer, writer: *std.Io.Writer) !void {
         const req = self.req;
         return writer.print("{s} {s}", .{ @tagName(req.method), req.url });
diff --git a/src/cdp/domains/network.zig b/src/cdp/domains/network.zig
index 385a8e40..a8db008c 100644
--- a/src/cdp/domains/network.zig
+++ b/src/cdp/domains/network.zig
@@ -351,18 +351,9 @@ pub const TransferAsRequestWriter = struct {
                 try jws.objectField(hdr.name);
                 try jws.write(hdr.value);
             }
-            if (transfer.req.cookie_jar) |jar| {
-                var aw: std.Io.Writer.Allocating = .init(transfer.arena.allocator());
-                try jar.forRequest(transfer.req.url, &aw.writer, .{
-                    .is_http = true,
-                    .origin_url = transfer.req.url,
-                    .is_navigation = transfer.req.resource_type == .document,
-                });
-                const cookie_str = aw.written();
-                if (cookie_str.len > 0) {
-                    try jws.objectField("Cookie");
-                    try jws.write(cookie_str);
-                }
+            if (try transfer.getCookieString()) |cookies| {
+                try jws.objectField("Cookie");
+                try jws.write(cookies[0 .. cookies.len - 1]);
             }
             try jws.endObject();
         }