Add URL struct

Combine uri + rawuri into single struct.

Try to improve ownership around URIs and URI-like things.
 - cookie & request can take *const std.Uri
   (TODO: make them aware of the new URL struct?)
 - Location (web api) should own its URL (web api URL)
 - Window should own its Location

Most of these changes result in (a) a cleaner Page and (b) not having to carry
around 2 nullable objects (URI and rawuri).

src/browser/browser.zig

@@ -38,9 +38,7 @@ const apiweb = @import("../apiweb.zig");
 const Window = @import("../html/window.zig").Window;
 const Walker = @import("../dom/walker.zig").WalkerDepthFirst;
 
-const URL = @import("../url/url.zig").URL;
-const Location = @import("../html/location.zig").Location;
-
+const URL = @import("../url.zig").URL;
 const storage = @import("../storage/storage.zig");
 
 const http = @import("../http/client.zig");
@@ -253,7 +251,7 @@ pub const Session = struct {
         self.env.stop();
         // TODO unload document: https://html.spec.whatwg.org/#unloading-documents
 
-        self.window.replaceLocation(null) catch |e| {
+        self.window.replaceLocation(.{ .url = null }) catch |e| {
             log.err("reset window location: {any}", .{e});
         };
 
@@ -269,7 +267,7 @@ pub const Session = struct {
 
     fn contextCreated(self: *Session, page: *Page, aux_data: ?[]const u8) void {
         log.debug("inspector context created", .{});
-        self.inspector.contextCreated(&self.env, "", page.origin orelse "://", aux_data);
+        self.inspector.contextCreated(&self.env, "", (page.origin() catch "://") orelse "://", aux_data);
     }
 };
 
@@ -283,14 +281,8 @@ pub const Page = struct {
     session: *Session,
     doc: ?*parser.Document = null,
 
-    // handle url
-    rawuri: ?[]const u8 = null,
-    uri: std.Uri = undefined,
-    origin: ?[]const u8 = null,
-
-    // html url and location
+    // The URL of the page
     url: ?URL = null,
-    location: Location = .{},
 
     raw_data: ?[]const u8 = null,
 
@@ -342,62 +334,52 @@ pub const Page = struct {
         log.debug("wait: OK", .{});
     }
 
+    fn origin(self: *const Page) !?[]const u8 {
+        const url = &(self.url orelse return null);
+        var arr: std.ArrayListUnmanaged(u8) = .{};
+        try url.origin(arr.writer(self.arena));
+        return arr.items;
+    }
+
     // spec reference: https://html.spec.whatwg.org/#document-lifecycle
     // - aux_data: extra data forwarded to the Inspector
     // see Inspector.contextCreated
-    pub fn navigate(self: *Page, uri: []const u8, aux_data: ?[]const u8) !void {
+    pub fn navigate(self: *Page, url_string: []const u8, aux_data: ?[]const u8) !void {
         const arena = self.arena;
 
-        log.debug("starting GET {s}", .{uri});
+        log.debug("starting GET {s}", .{url_string});
 
-        // if the uri is about:blank, nothing to do.
-        if (std.mem.eql(u8, "about:blank", uri)) {
+        // if the url is about:blank, nothing to do.
+        if (std.mem.eql(u8, "about:blank", url_string)) {
             return;
         }
 
-        self.uri = std.Uri.parse(uri) catch try std.Uri.parseAfterScheme("", uri);
-
+        // we don't clone url_string, because we're going to replace self.url
+        // later in this function, with the final request url (since we might
+        // redirect)
+        self.url = try URL.parse(url_string, "https");
         self.session.app.telemetry.record(.{ .navigate = .{
             .proxy = false,
-            .tls = std.ascii.eqlIgnoreCase(self.uri.scheme, "https"),
+            .tls = std.ascii.eqlIgnoreCase(self.url.?.scheme(), "https"),
         } });
 
         // load the data
-        var request = try self.newHTTPRequest(.GET, self.uri, .{ .navigation = true });
+        var request = try self.newHTTPRequest(.GET, &self.url.?, .{ .navigation = true });
         defer request.deinit();
 
         var response = try request.sendSync(.{});
+
+        // would be different than self.url in the case of a redirect
+        self.url = try URL.fromURI(arena, request.uri);
+
+        const url = &self.url.?;
         const header = response.header;
-        try self.session.cookie_jar.populateFromResponse(request.uri, &header);
-
-        // update uri after eventual redirection
-        var buf: std.ArrayListUnmanaged(u8) = .{};
-        try request.uri.writeToStream(.{
-            .scheme = true,
-            .authentication = true,
-            .authority = true,
-            .path = true,
-            .query = true,
-            .fragment = true,
-        }, buf.writer(arena));
-        self.rawuri = buf.items;
-
-        self.uri = try std.Uri.parse(self.rawuri.?);
+        try self.session.cookie_jar.populateFromResponse(&url.uri, &header);
 
         // TODO handle fragment in url.
-        self.url = try URL.constructor(arena, self.rawuri.?, null);
-        self.location.url = &self.url.?;
-        try self.session.window.replaceLocation(&self.location);
+        try self.session.window.replaceLocation(.{ .url = try url.toWebApi(arena) });
 
-        // prepare origin value.
-        buf = .{};
-        try request.uri.writeToStream(.{
-            .scheme = true,
-            .authority = true,
-        }, buf.writer(arena));
-        self.origin = buf.items;
-
-        log.info("GET {any} {d}", .{ self.uri, header.status });
+        log.info("GET {any} {d}", .{ url, header.status });
 
         const ct = blk: {
             break :blk header.get("content-type") orelse {
@@ -442,12 +424,12 @@ pub const Page = struct {
         };
     };
 
-    pub fn mouseEvent(self: *Page, allocator: Allocator, me: MouseEvent) !?ClickResult {
+    pub fn mouseEvent(self: *Page, me: MouseEvent) !void {
         if (me.type != .pressed) {
-            return null;
+            return;
         }
 
-        const element = self.renderer.getElementAtPosition(me.x, me.y) orelse return null;
+        const element = self.renderer.getElementAtPosition(me.x, me.y) orelse return;
 
         const event = try parser.mouseEventCreate();
         defer parser.mouseEventDestroy(event);
@@ -458,20 +440,6 @@ pub const Page = struct {
             .y = me.y,
         });
         _ = try parser.elementDispatchEvent(element, @ptrCast(event));
-
-        if ((try parser.mouseEventDefaultPrevented(event)) == true) {
-            return null;
-        }
-
-        const node = parser.elementToNode(element);
-        const tag = try parser.nodeName(node);
-        if (std.ascii.eqlIgnoreCase(tag, "a")) {
-            const href = (try parser.elementGetAttribute(element, "href")) orelse return null;
-            var buf = try allocator.alloc(u8, 1024);
-            return .{ .navigate = try std.Uri.resolve_inplace(self.uri, href, &buf) };
-        }
-
-        return null;
     }
 
     // https://html.spec.whatwg.org/#read-html
@@ -495,13 +463,13 @@ pub const Page = struct {
         // https://html.spec.whatwg.org/#reporting-document-loading-status
 
         // inject the URL to the document including the fragment.
-        try parser.documentSetDocumentURI(doc, self.rawuri orelse "about:blank");
+        try parser.documentSetDocumentURI(doc, if (self.url) |*url| url.raw else "about:blank");
 
         const session = self.session;
         // TODO set the referrer to the document.
         try session.window.replaceDocument(html_doc);
         session.window.setStorageShelf(
-            try session.storage_shed.getOrPut(self.origin orelse "null"),
+            try session.storage_shed.getOrPut((try self.origin()) orelse "null"),
         );
 
         // https://html.spec.whatwg.org/#read-html
@@ -511,7 +479,7 @@ pub const Page = struct {
 
         // replace the user context document with the new one.
         try session.env.setUserContext(.{
-            .uri = self.uri,
+            .url = @ptrCast(&self.url.?),
             .document = html_doc,
             .renderer = @ptrCast(&self.renderer),
             .cookie_jar = @ptrCast(&self.session.cookie_jar),
@@ -675,9 +643,6 @@ pub const Page = struct {
     fn fetchData(self: *const Page, arena: Allocator, src: []const u8, base: ?[]const u8) ![]const u8 {
         log.debug("starting fetch {s}", .{src});
 
-        var buffer: [1024]u8 = undefined;
-        var b: []u8 = buffer[0..];
-
         var res_src = src;
 
         // if a base path is given, we resolve src using base.
@@ -687,19 +652,20 @@ pub const Page = struct {
                 res_src = try std.fs.path.resolve(arena, &.{ _dir, src });
             }
         }
-        const u = try std.Uri.resolve_inplace(self.uri, res_src, &b);
+        var origin_url = &self.url.?;
+        const url = try origin_url.resolve(arena, res_src);
 
-        var request = try self.newHTTPRequest(.GET, u, .{
-            .origin_uri = self.uri,
+        var request = try self.newHTTPRequest(.GET, &url, .{
+            .origin_uri = &origin_url.uri,
             .navigation = false,
         });
         defer request.deinit();
 
         var response = try request.sendSync(.{});
         var header = response.header;
-        try self.session.cookie_jar.populateFromResponse(u, &header);
+        try self.session.cookie_jar.populateFromResponse(&url.uri, &header);
 
-        log.info("fetch {any}: {d}", .{ u, header.status });
+        log.info("fetch {any}: {d}", .{ url, header.status });
 
         if (header.status != 200) {
             return FetchError.BadStatusCode;
@@ -726,13 +692,13 @@ pub const Page = struct {
         try s.eval(arena, &self.session.env, body);
     }
 
-    fn newHTTPRequest(self: *const Page, method: http.Request.Method, uri: std.Uri, opts: storage.cookie.LookupOpts) !http.Request {
+    fn newHTTPRequest(self: *const Page, method: http.Request.Method, url: *const URL, opts: storage.cookie.LookupOpts) !http.Request {
         const session = self.session;
-        var request = try session.http_client.request(method, uri);
+        var request = try session.http_client.request(method, &url.uri);
         errdefer request.deinit();
 
         var arr: std.ArrayListUnmanaged(u8) = .{};
-        try session.cookie_jar.forRequest(uri, arr.writer(self.arena), opts);
+        try session.cookie_jar.forRequest(&url.uri, arr.writer(self.arena), opts);
 
         if (arr.items.len > 0) {
             try request.addHeader("Cookie", arr.items, .{});

src/cdp/cdp.zig

@@ -335,7 +335,7 @@ pub fn BrowserContext(comptime CDP_T: type) type {
 
         pub fn getURL(self: *const Self) ?[]const u8 {
             const page = self.session.currentPage() orelse return null;
-            return page.rawuri;
+            return if (page.url) |*url| url.raw else null;
         }
 
         pub fn onInspectorResponse(ctx: *anyopaque, _: u32, msg: []const u8) void {

src/cdp/domains/input.zig

@@ -64,11 +64,7 @@ fn dispatchMouseEvent(cmd: anytype) !void {
             else => unreachable,
         },
     };
-    const click_result = (try page.mouseEvent(cmd.arena, mouse_event)) orelse return;
-
-    switch (click_result) {
-        .navigate => |uri| try clickNavigate(cmd, uri),
-    }
+    try page.mouseEvent(mouse_event);
     // result already sent
 }
 

src/cdp/testing.zig

@@ -24,6 +24,7 @@ const Testing = @This();
 
 const main = @import("cdp.zig");
 const parser = @import("netsurf");
+const URL = @import("../url.zig").URL;
 const App = @import("../app.zig").App;
 
 const base = @import("../testing.zig");
@@ -85,8 +86,8 @@ const Session = struct {
             return error.MockBrowserPageAlreadyExists;
         }
         self.page = .{
-            .rawuri = "",
             .session = self,
+            .url = URL.parse("https://lightpanda.io/", null) catch unreachable,
             .aux_data = try self.arena.dupe(u8, aux_data orelse ""),
         };
         return &self.page.?;
@@ -104,7 +105,7 @@ const Session = struct {
 
 const Page = struct {
     session: *Session,
-    rawuri: []const u8,
+    url: ?URL = null,
     aux_data: []const u8 = "",
     doc: ?*parser.Document = null,
 
@@ -114,10 +115,7 @@ const Page = struct {
     }
 
     const MouseEvent = @import("../browser/browser.zig").Page.MouseEvent;
-    const ClickResult = @import("../browser/browser.zig").Page.ClickResult;
-    pub fn mouseEvent(_: *Page, _: Allocator, _: MouseEvent) !?ClickResult {
-        return null;
-    }
+    pub fn mouseEvent(_: *Page, _: MouseEvent) !void {}
 };
 
 const Client = struct {

src/html/location.zig

@@ -30,60 +30,60 @@ const checkCases = jsruntime.test_utils.checkCases;
 pub const Location = struct {
     pub const mem_guarantied = true;
 
-    url: ?*URL = null,
+    url: ?URL = null,
 
     pub fn deinit(_: *Location, _: std.mem.Allocator) void {}
 
     pub fn get_href(self: *Location, alloc: std.mem.Allocator) ![]const u8 {
-        if (self.url) |u| return u.get_href(alloc);
+        if (self.url) |*u| return u.get_href(alloc);
 
         return "";
     }
 
     pub fn get_protocol(self: *Location, alloc: std.mem.Allocator) ![]const u8 {
-        if (self.url) |u| return u.get_protocol(alloc);
+        if (self.url) |*u| return u.get_protocol(alloc);
 
         return "";
     }
 
     pub fn get_host(self: *Location, alloc: std.mem.Allocator) ![]const u8 {
-        if (self.url) |u| return u.get_host(alloc);
+        if (self.url) |*u| return u.get_host(alloc);
 
         return "";
     }
 
     pub fn get_hostname(self: *Location) []const u8 {
-        if (self.url) |u| return u.get_hostname();
+        if (self.url) |*u| return u.get_hostname();
 
         return "";
     }
 
     pub fn get_port(self: *Location, alloc: std.mem.Allocator) ![]const u8 {
-        if (self.url) |u| return u.get_port(alloc);
+        if (self.url) |*u| return u.get_port(alloc);
 
         return "";
     }
 
     pub fn get_pathname(self: *Location) []const u8 {
-        if (self.url) |u| return u.get_pathname();
+        if (self.url) |*u| return u.get_pathname();
 
         return "";
     }
 
     pub fn get_search(self: *Location, alloc: std.mem.Allocator) ![]const u8 {
-        if (self.url) |u| return u.get_search(alloc);
+        if (self.url) |*u| return u.get_search(alloc);
 
         return "";
     }
 
     pub fn get_hash(self: *Location, alloc: std.mem.Allocator) ![]const u8 {
-        if (self.url) |u| return u.get_hash(alloc);
+        if (self.url) |*u| return u.get_hash(alloc);
 
         return "";
     }
 
     pub fn get_origin(self: *Location, alloc: std.mem.Allocator) ![]const u8 {
-        if (self.url) |u| return u.get_origin(alloc);
+        if (self.url) |*u| return u.get_origin(alloc);
 
         return "";
     }

src/html/window.zig

@@ -24,6 +24,7 @@ const Callback = jsruntime.Callback;
 const CallbackArg = jsruntime.CallbackArg;
 const Loop = jsruntime.Loop;
 
+const URL = @import("../../../url.zig").URL;
 const EventTarget = @import("../dom/event_target.zig").EventTarget;
 const Navigator = @import("navigator.zig").Navigator;
 const History = @import("history.zig").History;
@@ -31,8 +32,6 @@ const Location = @import("location.zig").Location;
 
 const storage = @import("../storage/storage.zig");
 
-var emptyLocation = Location{};
-
 // https://dom.spec.whatwg.org/#interface-window-extensions
 // https://html.spec.whatwg.org/multipage/nav-history-apis.html#window
 pub const Window = struct {
@@ -46,9 +45,8 @@ pub const Window = struct {
     document: ?*parser.DocumentHTML = null,
     target: []const u8,
     history: History = .{},
-    location: *Location = &emptyLocation,
-
-    storageShelf: ?*storage.Shelf = null,
+    location: Location = .{},
+    storage_shelf: ?*storage.Shelf = null,
 
     // store a map between internal timeouts ids and pointers to uint.
     // the maximum number of possible timeouts is fixed.
@@ -64,21 +62,20 @@ pub const Window = struct {
         };
     }
 
-    pub fn replaceLocation(self: *Window, loc: ?*Location) !void {
-        self.location = loc orelse &emptyLocation;
-
+    pub fn replaceLocation(self: *Window, loc: Location) !void {
+        self.location = loc;
         if (self.document) |doc| {
-            try parser.documentHTMLSetLocation(Location, doc, self.location);
+            try parser.documentHTMLSetLocation(Location, doc, &self.location);
         }
     }
 
     pub fn replaceDocument(self: *Window, doc: *parser.DocumentHTML) !void {
         self.document = doc;
-        try parser.documentHTMLSetLocation(Location, doc, self.location);
+        try parser.documentHTMLSetLocation(Location, doc, &self.location);
     }
 
     pub fn setStorageShelf(self: *Window, shelf: *storage.Shelf) void {
-        self.storageShelf = shelf;
+        self.storage_shelf = shelf;
     }
 
     pub fn get_window(self: *Window) *Window {
@@ -90,7 +87,7 @@ pub const Window = struct {
     }
 
     pub fn get_location(self: *Window) *Location {
-        return self.location;
+        return &self.location;
     }
 
     pub fn get_self(self: *Window) *Window {
@@ -114,13 +111,13 @@ pub const Window = struct {
     }
 
     pub fn get_localStorage(self: *Window) !*storage.Bottle {
-        if (self.storageShelf == null) return parser.DOMError.NotSupported;
-        return &self.storageShelf.?.bucket.local;
+        if (self.storage_shelf == null) return parser.DOMError.NotSupported;
+        return &self.storage_shelf.?.bucket.local;
     }
 
     pub fn get_sessionStorage(self: *Window) !*storage.Bottle {
-        if (self.storageShelf == null) return parser.DOMError.NotSupported;
-        return &self.storageShelf.?.bucket.session;
+        if (self.storage_shelf == null) return parser.DOMError.NotSupported;
+        return &self.storage_shelf.?.bucket.session;
     }
 
     // TODO handle callback arguments.

src/http/client.zig

@@ -20,6 +20,7 @@ const builtin = @import("builtin");
 
 const os = std.os;
 const posix = std.posix;
+const Uri = std.Uri;
 const Thread = std.Thread;
 const Allocator = std.mem.Allocator;
 const MemoryPool = std.heap.MemoryPool;
@@ -72,7 +73,7 @@ pub const Client = struct {
         self.state_pool.deinit(allocator);
     }
 
-    pub fn request(self: *Client, method: Request.Method, url: anytype) !Request {
+    pub fn request(self: *Client, method: Request.Method, uri: *const Uri) !Request {
         const state = self.state_pool.acquire();
 
         errdefer {
@@ -80,7 +81,7 @@ pub const Client = struct {
             self.state_pool.release(state);
         }
 
-        return Request.init(self, state, method, url);
+        return Request.init(self, state, method, uri);
     }
 };
 
@@ -97,7 +98,11 @@ pub const Request = struct {
     method: Method,
 
     // The URI we're requested
-    uri: std.Uri,
+    uri: *const Uri,
+
+    // If we're redirecting, this is where we're redirecting to. The only reason
+    // we really have this is so that we can set self.uri = &self.redirect_url.?
+    redirect_uri: ?Uri = null,
 
     // Optional body
     body: ?[]const u8,
@@ -143,19 +148,7 @@ pub const Request = struct {
         }
     };
 
-    // url can either be a `[]const u8`, in which case we'll clone + parse, or a std.Uri
-    fn init(client: *Client, state: *State, method: Method, url: anytype) !Request {
-        var arena = state.arena.allocator();
-
-        var uri: std.Uri = undefined;
-
-        if (@TypeOf(url) == std.Uri) {
-            uri = url;
-        } else {
-            const owned = try arena.dupe(u8, url);
-            uri = try std.Uri.parse(owned);
-        }
-
+    fn init(client: *Client, state: *State, method: Method, uri: *const Uri) !Request {
         if (uri.host == null) {
             return error.UriMissingHost;
         }
@@ -166,7 +159,7 @@ pub const Request = struct {
             .method = method,
             .body = null,
             .headers = .{},
-            .arena = arena,
+            .arena = state.arena.allocator(),
             ._socket = null,
             ._state = state,
             ._client = client,
@@ -320,7 +313,9 @@ pub const Request = struct {
         var buf = try self.arena.alloc(u8, 1024);
 
         const previous_host = self.host();
-        self.uri = try self.uri.resolve_inplace(redirect.location, &buf);
+        self.redirect_uri = try self.uri.resolve_inplace(redirect.location, &buf);
+
+        self.uri = &self.redirect_uri.?;
         try self.verifyUri();
 
         if (redirect.use_get) {
@@ -1753,14 +1748,16 @@ test "HttpClient Reader: fuzz" {
 test "HttpClient: invalid url" {
     var client = try testClient();
     defer client.deinit();
-    try testing.expectError(error.UriMissingHost, client.request(.GET, "http:///"));
+    const uri = try Uri.parse("http:///");
+    try testing.expectError(error.UriMissingHost, client.request(.GET, &uri));
 }
 
 test "HttpClient: sync connect error" {
     var client = try testClient();
     defer client.deinit();
 
-    var req = try client.request(.GET, "HTTP://127.0.0.1:9920");
+    const uri = try Uri.parse("HTTP://127.0.0.1:9920");
+    var req = try client.request(.GET, &uri);
     try testing.expectError(error.ConnectionRefused, req.sendSync(.{}));
 }
 
@@ -1768,7 +1765,8 @@ test "HttpClient: sync no body" {
     var client = try testClient();
     defer client.deinit();
 
-    var req = try client.request(.GET, "http://127.0.0.1:9582/http_client/simple");
+    const uri = try Uri.parse("http://127.0.0.1:9582/http_client/simple");
+    var req = try client.request(.GET, &uri);
     var res = try req.sendSync(.{});
 
     try testing.expectEqual(null, try res.next());
@@ -1783,7 +1781,8 @@ test "HttpClient: sync tls no body" {
         var client = try testClient();
         defer client.deinit();
 
-        var req = try client.request(.GET, "https://127.0.0.1:9581/http_client/simple");
+        const uri = try Uri.parse("https://127.0.0.1:9581/http_client/simple");
+        var req = try client.request(.GET, &uri);
         var res = try req.sendSync(.{ .tls_verify_host = false });
 
         try testing.expectEqual(null, try res.next());
@@ -1797,7 +1796,8 @@ test "HttpClient: sync with body" {
     var client = try testClient();
     defer client.deinit();
 
-    var req = try client.request(.GET, "http://127.0.0.1:9582/http_client/echo");
+    const uri = try Uri.parse("http://127.0.0.1:9582/http_client/echo");
+    var req = try client.request(.GET, &uri);
     var res = try req.sendSync(.{});
 
     try testing.expectEqual("over 9000!", try res.next());
@@ -1820,7 +1820,8 @@ test "HttpClient: sync tls with body" {
         var client = try testClient();
         defer client.deinit();
 
-        var req = try client.request(.GET, "https://127.0.0.1:9581/http_client/body");
+        const uri = try Uri.parse("https://127.0.0.1:9581/http_client/body");
+        var req = try client.request(.GET, &uri);
         var res = try req.sendSync(.{ .tls_verify_host = false });
 
         while (try res.next()) |data| {
@@ -1844,7 +1845,8 @@ test "HttpClient: sync redirect from TLS to Plaintext" {
         var client = try testClient();
         defer client.deinit();
 
-        var req = try client.request(.GET, "https://127.0.0.1:9581/http_client/redirect/insecure");
+        const uri = try Uri.parse("https://127.0.0.1:9581/http_client/redirect/insecure");
+        var req = try client.request(.GET, &uri);
         var res = try req.sendSync(.{ .tls_verify_host = false });
 
         while (try res.next()) |data| {
@@ -1871,7 +1873,8 @@ test "HttpClient: sync redirect plaintext to TLS" {
         var client = try testClient();
         defer client.deinit();
 
-        var req = try client.request(.GET, "http://127.0.0.1:9582/http_client/redirect/secure");
+        const uri = try Uri.parse("http://127.0.0.1:9582/http_client/redirect/secure");
+        var req = try client.request(.GET, &uri);
         var res = try req.sendSync(.{ .tls_verify_host = false });
 
         while (try res.next()) |data| {
@@ -1889,7 +1892,8 @@ test "HttpClient: sync GET redirect" {
     var client = try testClient();
     defer client.deinit();
 
-    var req = try client.request(.GET, "http://127.0.0.1:9582/http_client/redirect");
+    const uri = try Uri.parse("http://127.0.0.1:9582/http_client/redirect");
+    var req = try client.request(.GET, &uri);
     var res = try req.sendSync(.{ .tls_verify_host = false });
 
     try testing.expectEqual("over 9000!", try res.next());
@@ -1925,7 +1929,8 @@ test "HttpClient: async connect error" {
     var client = try testClient();
     defer client.deinit();
 
-    var req = try client.request(.GET, "HTTP://127.0.0.1:9920");
+    const uri = try Uri.parse("HTTP://127.0.0.1:9920");
+    var req = try client.request(.GET, &uri);
     try req.sendAsync(&loop, Handler{ .reset = &reset }, .{});
     try loop.io.run_for_ns(std.time.ns_per_ms);
     try reset.timedWait(std.time.ns_per_s);
@@ -1938,7 +1943,8 @@ test "HttpClient: async no body" {
     var handler = try CaptureHandler.init();
     defer handler.deinit();
 
-    var req = try client.request(.GET, "HTTP://127.0.0.1:9582/http_client/simple");
+    const uri = try Uri.parse("HTTP://127.0.0.1:9582/http_client/simple");
+    var req = try client.request(.GET, &uri);
     try req.sendAsync(&handler.loop, &handler, .{});
     try handler.waitUntilDone();
 
@@ -1955,7 +1961,8 @@ test "HttpClient: async with body" {
     var handler = try CaptureHandler.init();
     defer handler.deinit();
 
-    var req = try client.request(.GET, "HTTP://127.0.0.1:9582/http_client/echo");
+    const uri = try Uri.parse("HTTP://127.0.0.1:9582/http_client/echo");
+    var req = try client.request(.GET, &uri);
     try req.sendAsync(&handler.loop, &handler, .{});
     try handler.waitUntilDone();
 
@@ -1978,7 +1985,8 @@ test "HttpClient: async redirect" {
     var handler = try CaptureHandler.init();
     defer handler.deinit();
 
-    var req = try client.request(.GET, "HTTP://127.0.0.1:9582/http_client/redirect");
+    const uri = try Uri.parse("HTTP://127.0.0.1:9582/http_client/redirect");
+    var req = try client.request(.GET, &uri);
     try req.sendAsync(&handler.loop, &handler, .{});
 
     // Called twice on purpose. The initial GET resutls in the # of pending
@@ -2008,7 +2016,8 @@ test "HttpClient: async tls no body" {
         var handler = try CaptureHandler.init();
         defer handler.deinit();
 
-        var req = try client.request(.GET, "HTTPs://127.0.0.1:9581/http_client/simple");
+        const uri = try Uri.parse("HTTPs://127.0.0.1:9581/http_client/simple");
+        var req = try client.request(.GET, &uri);
         try req.sendAsync(&handler.loop, &handler, .{ .tls_verify_host = false });
         try handler.waitUntilDone();
 
@@ -2027,7 +2036,8 @@ test "HttpClient: async tls with body" {
         var handler = try CaptureHandler.init();
         defer handler.deinit();
 
-        var req = try client.request(.GET, "HTTPs://127.0.0.1:9581/http_client/body");
+        const uri = try Uri.parse("HTTPs://127.0.0.1:9581/http_client/body");
+        var req = try client.request(.GET, &uri);
         try req.sendAsync(&handler.loop, &handler, .{ .tls_verify_host = false });
         try handler.waitUntilDone();
 
@@ -2051,7 +2061,8 @@ test "HttpClient: async redirect from TLS to Plaintext" {
         var handler = try CaptureHandler.init();
         defer handler.deinit();
 
-        var req = try client.request(.GET, "https://127.0.0.1:9581/http_client/redirect/insecure");
+        const uri = try Uri.parse("https://127.0.0.1:9581/http_client/redirect/insecure");
+        var req = try client.request(.GET, &uri);
         try req.sendAsync(&handler.loop, &handler, .{ .tls_verify_host = false });
         try handler.waitUntilDone();
 
@@ -2074,7 +2085,8 @@ test "HttpClient: async redirect plaintext to TLS" {
         var handler = try CaptureHandler.init();
         defer handler.deinit();
 
-        var req = try client.request(.GET, "http://127.0.0.1:9582/http_client/redirect/secure");
+        const uri = try Uri.parse("http://127.0.0.1:9582/http_client/redirect/secure");
+        var req = try client.request(.GET, &uri);
         try req.sendAsync(&handler.loop, &handler, .{ .tls_verify_host = false });
         try handler.waitUntilDone();
 

src/main_tests.zig

@@ -29,9 +29,7 @@ const browser = @import("browser/browser.zig");
 const Window = @import("html/window.zig").Window;
 const xhr = @import("xhr/xhr.zig");
 const storage = @import("storage/storage.zig");
-const URL = @import("url/url.zig").URL;
-const urlquery = @import("url/query.zig");
-const Location = @import("html/location.zig").Location;
+const URL = @import("url.zig").URL;
 
 const documentTestExecFn = @import("dom/document.zig").testExecFn;
 const HTMLDocumentTestExecFn = @import("html/document.zig").testExecFn;
@@ -94,9 +92,7 @@ fn testExecFn(
     // alias global as self and window
     var window = Window.create(null, null);
 
-    const url = "https://lightpanda.io/opensource-browser/";
-    var u = try URL.constructor(alloc, url, null);
-    defer u.deinit(alloc);
+    const url = try URL.parse("https://lightpanda.io/opensource-browser/", null);
 
     var cookie_jar = storage.CookieJar.init(alloc);
     defer cookie_jar.deinit();
@@ -106,15 +102,14 @@ fn testExecFn(
     defer renderer.positions.deinit(alloc);
 
     try js_env.setUserContext(.{
-        .uri = try std.Uri.parse(url),
+        .url = &url,
         .document = doc,
         .renderer = &renderer,
         .cookie_jar = &cookie_jar,
         .http_client = &http_client,
     });
 
-    var location = Location{ .url = &u };
-    try window.replaceLocation(&location);
+    try window.replaceLocation(.{ .url = try url.toWebApi(alloc) });
 
     try window.replaceDocument(doc);
     window.setStorageShelf(&storageShelf);

src/storage/cookie.zig

@@ -9,7 +9,11 @@ const public_suffix_list = @import("../data/public_suffix_list.zig").lookup;
 
 const log = std.log.scoped(.cookie);
 
-pub const LookupOpts = struct { request_time: ?i64 = null, origin_uri: ?Uri = null, navigation: bool = true };
+pub const LookupOpts = struct {
+    request_time: ?i64 = null,
+    origin_uri: ?*const Uri = null,
+    navigation: bool = true,
+};
 
 pub const Jar = struct {
     allocator: Allocator,
@@ -56,7 +60,7 @@ pub const Jar = struct {
         }
     }
 
-    pub fn forRequest(self: *Jar, target_uri: Uri, writer: anytype, opts: LookupOpts) !void {
+    pub fn forRequest(self: *Jar, target_uri: *const Uri, writer: anytype, opts: LookupOpts) !void {
         const target_path = target_uri.path.percent_encoded;
         const target_host = (target_uri.host orelse return error.InvalidURI).percent_encoded;
 
@@ -147,7 +151,7 @@ pub const Jar = struct {
         }
     }
 
-    pub fn populateFromResponse(self: *Jar, uri: Uri, header: *const http.ResponseHeader) !void {
+    pub fn populateFromResponse(self: *Jar, uri: *const Uri, header: *const http.ResponseHeader) !void {
         const now = std.time.timestamp();
         var it = header.iterate("set-cookie");
         while (it.next()) |set_cookie| {
@@ -226,7 +230,7 @@ fn areCookiesEqual(a: *const Cookie, b: *const Cookie) bool {
     return true;
 }
 
-fn areSameSite(origin_uri_: ?std.Uri, target_host: []const u8) !bool {
+fn areSameSite(origin_uri_: ?*const std.Uri, target_host: []const u8) !bool {
     const origin_uri = origin_uri_ orelse return true;
     const origin_host = (origin_uri.host orelse return error.InvalidURI).percent_encoded;
 
@@ -284,7 +288,7 @@ pub const Cookie = struct {
     // Invalid attribute values? Ignore.
     // Duplicate attributes - use the last valid
     // Value-less attributes with a value? Ignore the value
-    pub fn parse(allocator: Allocator, uri: std.Uri, str: []const u8) !Cookie {
+    pub fn parse(allocator: Allocator, uri: *const std.Uri, str: []const u8) !Cookie {
         if (str.len == 0) {
             // this check is necessary, `std.mem.minMax` asserts len > 0
             return error.Empty;
@@ -501,28 +505,28 @@ test "Jar: add" {
     defer jar.deinit();
     try expectCookies(&.{}, jar);
 
-    try jar.add(try Cookie.parse(testing.allocator, test_uri, "over=9000;Max-Age=0"), now);
+    try jar.add(try Cookie.parse(testing.allocator, &test_uri, "over=9000;Max-Age=0"), now);
     try expectCookies(&.{}, jar);
 
-    try jar.add(try Cookie.parse(testing.allocator, test_uri, "over=9000"), now);
+    try jar.add(try Cookie.parse(testing.allocator, &test_uri, "over=9000"), now);
     try expectCookies(&.{.{ "over", "9000" }}, jar);
 
-    try jar.add(try Cookie.parse(testing.allocator, test_uri, "over=9000!!"), now);
+    try jar.add(try Cookie.parse(testing.allocator, &test_uri, "over=9000!!"), now);
     try expectCookies(&.{.{ "over", "9000!!" }}, jar);
 
-    try jar.add(try Cookie.parse(testing.allocator, test_uri, "spice=flow"), now);
+    try jar.add(try Cookie.parse(testing.allocator, &test_uri, "spice=flow"), now);
     try expectCookies(&.{ .{ "over", "9000!!" }, .{ "spice", "flow" } }, jar);
 
-    try jar.add(try Cookie.parse(testing.allocator, test_uri, "spice=flows;Path=/"), now);
+    try jar.add(try Cookie.parse(testing.allocator, &test_uri, "spice=flows;Path=/"), now);
     try expectCookies(&.{ .{ "over", "9000!!" }, .{ "spice", "flows" } }, jar);
 
-    try jar.add(try Cookie.parse(testing.allocator, test_uri, "over=9001;Path=/other"), now);
+    try jar.add(try Cookie.parse(testing.allocator, &test_uri, "over=9001;Path=/other"), now);
     try expectCookies(&.{ .{ "over", "9000!!" }, .{ "spice", "flows" }, .{ "over", "9001" } }, jar);
 
-    try jar.add(try Cookie.parse(testing.allocator, test_uri, "over=9002;Path=/;Domain=lightpanda.io"), now);
+    try jar.add(try Cookie.parse(testing.allocator, &test_uri, "over=9002;Path=/;Domain=lightpanda.io"), now);
     try expectCookies(&.{ .{ "over", "9000!!" }, .{ "spice", "flows" }, .{ "over", "9001" }, .{ "over", "9002" } }, jar);
 
-    try jar.add(try Cookie.parse(testing.allocator, test_uri, "over=x;Path=/other;Max-Age=-200"), now);
+    try jar.add(try Cookie.parse(testing.allocator, &test_uri, "over=x;Path=/other;Max-Age=-200"), now);
     try expectCookies(&.{ .{ "over", "9000!!" }, .{ "spice", "flows" }, .{ "over", "9002" } }, jar);
 }
 
@@ -531,7 +535,7 @@ test "Jar: forRequest" {
         fn expect(expected: []const u8, jar: *Jar, target_uri: Uri, opts: LookupOpts) !void {
             var arr: std.ArrayListUnmanaged(u8) = .{};
             defer arr.deinit(testing.allocator);
-            try jar.forRequest(target_uri, arr.writer(testing.allocator), opts);
+            try jar.forRequest(&target_uri, arr.writer(testing.allocator), opts);
             try testing.expectEqual(expected, arr.items);
         }
     }.expect;
@@ -548,108 +552,108 @@ test "Jar: forRequest" {
         try expectCookies("", &jar, test_uri, .{});
     }
 
-    try jar.add(try Cookie.parse(testing.allocator, test_uri, "global1=1"), now);
-    try jar.add(try Cookie.parse(testing.allocator, test_uri, "global2=2;Max-Age=30;domain=lightpanda.io"), now);
-    try jar.add(try Cookie.parse(testing.allocator, test_uri, "path1=3;Path=/about"), now);
-    try jar.add(try Cookie.parse(testing.allocator, test_uri, "path2=4;Path=/docs/"), now);
-    try jar.add(try Cookie.parse(testing.allocator, test_uri, "secure=5;Secure"), now);
-    try jar.add(try Cookie.parse(testing.allocator, test_uri, "sitenone=6;SameSite=None;Path=/x/;Secure"), now);
-    try jar.add(try Cookie.parse(testing.allocator, test_uri, "sitelax=7;SameSite=Lax;Path=/x/"), now);
-    try jar.add(try Cookie.parse(testing.allocator, test_uri, "sitestrict=8;SameSite=Strict;Path=/x/"), now);
-    try jar.add(try Cookie.parse(testing.allocator, test_uri_2, "domain1=9;domain=test.lightpanda.io"), now);
+    try jar.add(try Cookie.parse(testing.allocator, &test_uri, "global1=1"), now);
+    try jar.add(try Cookie.parse(testing.allocator, &test_uri, "global2=2;Max-Age=30;domain=lightpanda.io"), now);
+    try jar.add(try Cookie.parse(testing.allocator, &test_uri, "path1=3;Path=/about"), now);
+    try jar.add(try Cookie.parse(testing.allocator, &test_uri, "path2=4;Path=/docs/"), now);
+    try jar.add(try Cookie.parse(testing.allocator, &test_uri, "secure=5;Secure"), now);
+    try jar.add(try Cookie.parse(testing.allocator, &test_uri, "sitenone=6;SameSite=None;Path=/x/;Secure"), now);
+    try jar.add(try Cookie.parse(testing.allocator, &test_uri, "sitelax=7;SameSite=Lax;Path=/x/"), now);
+    try jar.add(try Cookie.parse(testing.allocator, &test_uri, "sitestrict=8;SameSite=Strict;Path=/x/"), now);
+    try jar.add(try Cookie.parse(testing.allocator, &test_uri_2, "domain1=9;domain=test.lightpanda.io"), now);
 
     // nothing fancy here
     try expectCookies("global1=1, global2=2", &jar, test_uri, .{});
-    try expectCookies("global1=1, global2=2", &jar, test_uri, .{ .origin_uri = test_uri, .navigation = false });
+    try expectCookies("global1=1, global2=2", &jar, test_uri, .{ .origin_uri = &test_uri, .navigation = false });
 
     // We have a cookie where Domain=lightpanda.io
     // This should _not_ match xyxlightpanda.io
     try expectCookies("", &jar, try std.Uri.parse("http://anothersitelightpanda.io/"), .{
-        .origin_uri = test_uri,
+        .origin_uri = &test_uri,
     });
 
     // matching path without trailing /
     try expectCookies("global1=1, global2=2, path1=3", &jar, try std.Uri.parse("http://lightpanda.io/about"), .{
-        .origin_uri = test_uri,
+        .origin_uri = &test_uri,
     });
 
     // incomplete prefix path
     try expectCookies("global1=1, global2=2", &jar, try std.Uri.parse("http://lightpanda.io/abou"), .{
-        .origin_uri = test_uri,
+        .origin_uri = &test_uri,
     });
 
     // path doesn't match
     try expectCookies("global1=1, global2=2", &jar, try std.Uri.parse("http://lightpanda.io/aboutus"), .{
-        .origin_uri = test_uri,
+        .origin_uri = &test_uri,
     });
 
     // path doesn't match cookie directory
     try expectCookies("global1=1, global2=2", &jar, try std.Uri.parse("http://lightpanda.io/docs"), .{
-        .origin_uri = test_uri,
+        .origin_uri = &test_uri,
     });
 
     // exact directory match
     try expectCookies("global1=1, global2=2, path2=4", &jar, try std.Uri.parse("http://lightpanda.io/docs/"), .{
-        .origin_uri = test_uri,
+        .origin_uri = &test_uri,
     });
 
     // sub directory match
     try expectCookies("global1=1, global2=2, path2=4", &jar, try std.Uri.parse("http://lightpanda.io/docs/more"), .{
-        .origin_uri = test_uri,
+        .origin_uri = &test_uri,
     });
 
     // secure
     try expectCookies("global1=1, global2=2, secure=5", &jar, try std.Uri.parse("https://lightpanda.io/"), .{
-        .origin_uri = test_uri,
+        .origin_uri = &test_uri,
     });
 
     // navigational cross domain, secure
     try expectCookies("global1=1, global2=2, secure=5, sitenone=6, sitelax=7", &jar, try std.Uri.parse("https://lightpanda.io/x/"), .{
-        .origin_uri = try std.Uri.parse("https://example.com/"),
+        .origin_uri = &(try std.Uri.parse("https://example.com/")),
     });
 
     // navigational cross domain, insecure
     try expectCookies("global1=1, global2=2, sitelax=7", &jar, try std.Uri.parse("http://lightpanda.io/x/"), .{
-        .origin_uri = try std.Uri.parse("https://example.com/"),
+        .origin_uri = &(try std.Uri.parse("https://example.com/")),
     });
 
     // non-navigational cross domain, insecure
     try expectCookies("", &jar, try std.Uri.parse("http://lightpanda.io/x/"), .{
-        .origin_uri = try std.Uri.parse("https://example.com/"),
+        .origin_uri = &(try std.Uri.parse("https://example.com/")),
         .navigation = false,
     });
 
     // non-navigational cross domain, secure
     try expectCookies("sitenone=6", &jar, try std.Uri.parse("https://lightpanda.io/x/"), .{
-        .origin_uri = try std.Uri.parse("https://example.com/"),
+        .origin_uri = &(try std.Uri.parse("https://example.com/")),
         .navigation = false,
     });
 
     // non-navigational same origin
     try expectCookies("global1=1, global2=2, sitelax=7, sitestrict=8", &jar, try std.Uri.parse("http://lightpanda.io/x/"), .{
-        .origin_uri = try std.Uri.parse("https://lightpanda.io/"),
+        .origin_uri = &(try std.Uri.parse("https://lightpanda.io/")),
         .navigation = false,
     });
 
     // exact domain match + suffix
     try expectCookies("global2=2, domain1=9", &jar, try std.Uri.parse("http://test.lightpanda.io/"), .{
-        .origin_uri = test_uri,
+        .origin_uri = &test_uri,
     });
 
     // domain suffix match + suffix
     try expectCookies("global2=2, domain1=9", &jar, try std.Uri.parse("http://1.test.lightpanda.io/"), .{
-        .origin_uri = test_uri,
+        .origin_uri = &test_uri,
     });
 
     // non-matching domain
     try expectCookies("global2=2", &jar, try std.Uri.parse("http://other.lightpanda.io/"), .{
-        .origin_uri = test_uri,
+        .origin_uri = &test_uri,
     });
 
     const l = jar.cookies.items.len;
     try expectCookies("global1=1", &jar, test_uri, .{
         .request_time = now + 100,
-        .origin_uri = test_uri,
+        .origin_uri = &test_uri,
     });
     try testing.expectEqual(l - 1, jar.cookies.items.len);
 
@@ -664,7 +668,7 @@ test "CookieList: write" {
     var cookie_list = CookieList{};
     defer cookie_list.deinit(testing.allocator);
 
-    const c1 = try Cookie.parse(testing.allocator, test_uri, "cookie_name=cookie_value");
+    const c1 = try Cookie.parse(testing.allocator, &test_uri, "cookie_name=cookie_value");
     defer c1.deinit();
     {
         try cookie_list._cookies.append(testing.allocator, &c1);
@@ -672,7 +676,7 @@ test "CookieList: write" {
         try testing.expectEqual("cookie_name=cookie_value", arr.items);
     }
 
-    const c2 = try Cookie.parse(testing.allocator, test_uri, "x84");
+    const c2 = try Cookie.parse(testing.allocator, &test_uri, "x84");
     defer c2.deinit();
     {
         arr.clearRetainingCapacity();
@@ -681,7 +685,7 @@ test "CookieList: write" {
         try testing.expectEqual("cookie_name=cookie_value; x84", arr.items);
     }
 
-    const c3 = try Cookie.parse(testing.allocator, test_uri, "nope=");
+    const c3 = try Cookie.parse(testing.allocator, &test_uri, "nope=");
     defer c3.deinit();
     {
         arr.clearRetainingCapacity();
@@ -866,7 +870,7 @@ const ExpectedCookie = struct {
 
 fn expectCookie(expected: ExpectedCookie, url: []const u8, set_cookie: []const u8) !void {
     const uri = try Uri.parse(url);
-    var cookie = try Cookie.parse(testing.allocator, uri, set_cookie);
+    var cookie = try Cookie.parse(testing.allocator, &uri, set_cookie);
     defer cookie.deinit();
 
     try testing.expectEqual(expected.name, cookie.name);
@@ -882,7 +886,7 @@ fn expectCookie(expected: ExpectedCookie, url: []const u8, set_cookie: []const u
 
 fn expectAttribute(expected: anytype, url: ?[]const u8, set_cookie: []const u8) !void {
     const uri = if (url) |u| try Uri.parse(u) else test_uri;
-    var cookie = try Cookie.parse(testing.allocator, uri, set_cookie);
+    var cookie = try Cookie.parse(testing.allocator, &uri, set_cookie);
     defer cookie.deinit();
 
     inline for (@typeInfo(@TypeOf(expected)).@"struct".fields) |f| {
@@ -896,7 +900,7 @@ fn expectAttribute(expected: anytype, url: ?[]const u8, set_cookie: []const u8)
 
 fn expectError(expected: anyerror, url: ?[]const u8, set_cookie: []const u8) !void {
     const uri = if (url) |u| try Uri.parse(u) else test_uri;
-    try testing.expectError(expected, Cookie.parse(testing.allocator, uri, set_cookie));
+    try testing.expectError(expected, Cookie.parse(testing.allocator, &uri, set_cookie));
 }
 
 const test_uri = Uri.parse("http://lightpanda.io/") catch unreachable;

src/url.zig

@@ -0,0 +1,75 @@
+const std = @import("std");
+
+const Uri = std.Uri;
+const Allocator = std.mem.Allocator;
+const WebApiURL = @import("url/url.zig").URL;
+
+pub const URL = struct {
+    uri: Uri,
+    raw: []const u8,
+
+    // We assume str will last as long as the URL
+    // In some cases, this is safe to do, because we know the URL is short lived.
+    // In most cases though, we assume the caller will just dupe the string URL
+    // into an arena
+    pub fn parse(str: []const u8, default_scheme: ?[]const u8) !URL {
+        const uri = Uri.parse(str) catch try Uri.parseAfterScheme(default_scheme orelse "https", str);
+        if (uri.host == null) {
+            return error.MissingHost;
+        }
+
+        std.debug.assert(uri.host.? == .percent_encoded);
+
+        return .{
+            .uri = uri,
+            .raw = str,
+        };
+    }
+
+    pub fn fromURI(arena: Allocator, uri: *const Uri) !URL {
+        // This is embarrassing.
+        var buf: std.ArrayListUnmanaged(u8) = .{};
+        try uri.writeToStream(.{
+            .scheme = true,
+            .authentication = true,
+            .authority = true,
+            .path = true,
+            .query = true,
+            .fragment = true,
+        }, buf.writer(arena));
+
+        return parse(buf.items, null);
+    }
+
+    // Above, in `parse, we error if a host doesn't exist
+    // In other words, we can't have a URL with a null host.
+    pub fn host(self: *const URL) []const u8 {
+        return self.uri.host.?.percent_encoded;
+    }
+
+    pub fn port(self: *const URL) ?u16 {
+        return self.uri.port;
+    }
+
+    pub fn scheme(self: *const URL) []const u8 {
+        return self.uri.scheme;
+    }
+
+    pub fn origin(self: *const URL, writer: anytype) !void {
+        return self.uri.writeToStream(.{ .scheme = true, .authority = true }, writer);
+    }
+
+    pub fn resolve(self: *const URL, arena: Allocator, url: []const u8) !URL {
+        var buf = try arena.alloc(u8, 1024);
+        const new_uri = try self.uri.resolve_inplace(url, &buf);
+        return fromURI(arena, &new_uri);
+    }
+
+    pub fn format(self: *const URL, comptime _: []const u8, _: std.fmt.FormatOptions, writer: anytype) !void {
+        return writer.writeAll(self.raw);
+    }
+
+    pub fn toWebApi(self: *const URL, allocator: Allocator) !WebApiURL {
+        return WebApiURL.init(allocator, self.uri);
+    }
+};

src/url/url.zig

@@ -44,25 +44,24 @@ pub const Interfaces = .{
 // 2. The other way would bu to copy the `std.Uri` code to ahve a dedicated
 // parser including the characters we want for the web API.
 pub const URL = struct {
-    rawuri: []const u8,
     uri: std.Uri,
     search_params: URLSearchParams,
 
     pub const mem_guarantied = true;
 
-    pub fn constructor(alloc: std.mem.Allocator, url: []const u8, base: ?[]const u8) !URL {
-        const raw = try std.mem.concat(alloc, u8, &[_][]const u8{ url, base orelse "" });
-        errdefer alloc.free(raw);
+    pub fn constructor(arena: std.mem.Allocator, url: []const u8, base: ?[]const u8) !URL {
+        const raw = try std.mem.concat(arena, u8, &[_][]const u8{ url, base orelse "" });
+        errdefer arena.free(raw);
 
-        const uri = std.Uri.parse(raw) catch {
-            return error.TypeError;
-        };
+        const uri = std.Uri.parse(raw) catch return error.TypeError;
+        return init(arena, uri);
+    }
 
+    pub fn init(arena: std.mem.Allocator, uri: std.Uri) !URL {
         return .{
-            .rawuri = raw,
             .uri = uri,
             .search_params = try URLSearchParams.constructor(
-                alloc,
+                arena,
                 uriComponentNullStr(uri.query),
             ),
         };
@@ -70,7 +69,6 @@ pub const URL = struct {
 
     pub fn deinit(self: *URL, alloc: std.mem.Allocator) void {
         self.search_params.deinit(alloc);
-        alloc.free(self.rawuri);
     }
 
     // the caller must free the returned string.

src/user_context.zig

@@ -1,11 +1,12 @@
 const std = @import("std");
 const parser = @import("netsurf");
+const URL = @import("url.zig").URL;
 const storage = @import("storage/storage.zig");
 const Client = @import("http/client.zig").Client;
 const Renderer = @import("browser/browser.zig").Renderer;
 
 pub const UserContext = struct {
-    uri: std.Uri,
+    url: *const URL,
     http_client: *Client,
     document: *parser.DocumentHTML,
     cookie_jar: *storage.CookieJar,

src/xhr/xhr.zig

@@ -31,6 +31,7 @@ const XMLHttpRequestEventTarget = @import("event_target.zig").XMLHttpRequestEven
 const Mime = @import("../browser/mime.zig").Mime;
 
 const Loop = jsruntime.Loop;
+const URL = @import("../url.zig").URL;
 const http = @import("../http/client.zig");
 
 const parser = @import("netsurf");
@@ -103,8 +104,9 @@ pub const XMLHttpRequest = struct {
 
     method: http.Request.Method,
     state: State,
-    url: ?[]const u8,
-    uri: std.Uri,
+    url: ?URL = null,
+    origin_url: *const URL,
+
     // request headers
     headers: Headers,
     sync: bool = true,
@@ -113,7 +115,6 @@ pub const XMLHttpRequest = struct {
 
     cookie_jar: *CookieJar,
     // the URI of the page where this request is originating from
-    origin_uri: std.Uri,
 
     // TODO uncomment this field causes casting issue with
     // XMLHttpRequestEventTarget. I think it's dueto an alignement issue, but
@@ -291,17 +292,15 @@ pub const XMLHttpRequest = struct {
             .headers = Headers.init(alloc),
             .response_headers = Headers.init(alloc),
             .method = undefined,
-            .url = null,
-            .uri = undefined,
             .state = .unsent,
-            .origin_uri = userctx.uri,
+            .url = null,
+            .origin_url = userctx.url,
             .client = userctx.http_client,
             .cookie_jar = userctx.cookie_jar,
         };
     }
 
-    pub fn reset(self: *XMLHttpRequest, alloc: std.mem.Allocator) void {
-        if (self.url) |v| alloc.free(v);
+    pub fn reset(self: *XMLHttpRequest) void {
         self.url = null;
 
         if (self.response_obj) |v| v.deinit();
@@ -379,13 +378,9 @@ pub const XMLHttpRequest = struct {
 
         self.method = try validMethod(method);
 
-        self.reset(alloc);
+        self.reset();
 
-        self.url = try alloc.dupe(u8, url);
-        self.uri = std.Uri.parse(self.url.?) catch |err| {
-            log.debug("parse url ({s}): {any}", .{ self.url.?, err });
-            return DOMError.Syntax;
-        };
+        self.url = try self.origin_url.resolve(alloc, url);
         log.debug("open url ({s})", .{self.url.?});
         self.sync = if (asyn) |b| !b else false;
 
@@ -475,12 +470,12 @@ pub const XMLHttpRequest = struct {
         if (self.state != .opened) return DOMError.InvalidState;
         if (self.send_flag) return DOMError.InvalidState;
 
-        log.debug("{any} {any}", .{ self.method, self.uri });
+        log.debug("{any} {any}", .{ self.method, self.url });
 
         self.send_flag = true;
         self.priv_state = .open;
 
-        self.request = try self.client.request(self.method, self.uri);
+        self.request = try self.client.request(self.method, &self.url.?.uri);
         var request = &self.request.?;
         errdefer request.deinit();
 
@@ -490,9 +485,9 @@ pub const XMLHttpRequest = struct {
 
         {
             var arr: std.ArrayListUnmanaged(u8) = .{};
-            try self.cookie_jar.forRequest(self.uri, arr.writer(alloc), .{
+            try self.cookie_jar.forRequest(&self.url.?.uri, arr.writer(alloc), .{
                 .navigation = false,
-                .origin_uri = self.origin_uri,
+                .origin_uri = &self.origin_url.uri,
             });
 
             if (arr.items.len > 0) {
@@ -522,7 +517,7 @@ pub const XMLHttpRequest = struct {
 
         if (progress.first) {
             const header = progress.header;
-            log.info("{any} {any} {d}", .{ self.method, self.uri, header.status });
+            log.info("{any} {any} {d}", .{ self.method, self.url, header.status });
 
             self.priv_state = .done;
 
@@ -546,7 +541,7 @@ pub const XMLHttpRequest = struct {
             self.state = .loading;
             self.dispatchEvt("readystatechange");
 
-            try self.cookie_jar.populateFromResponse(self.uri, &header);
+            try self.cookie_jar.populateFromResponse(self.request.?.uri, &header);
         }
 
         if (progress.data) |data| {
@@ -588,7 +583,7 @@ pub const XMLHttpRequest = struct {
         self.dispatchProgressEvent("error", .{});
         self.dispatchProgressEvent("loadend", .{});
 
-        log.debug("{any} {any} {any}", .{ self.method, self.uri, self.err });
+        log.debug("{any} {any} {any}", .{ self.method, self.url, self.err });
     }
 
     pub fn _abort(self: *XMLHttpRequest) void {
@@ -637,7 +632,8 @@ pub const XMLHttpRequest = struct {
 
     // TODO retrieve the redirected url
     pub fn get_responseURL(self: *XMLHttpRequest) ?[]const u8 {
-        return self.url;
+        const url = &(self.url orelse return null);
+        return url.raw;
     }
 
     pub fn get_responseXML(self: *XMLHttpRequest, alloc: std.mem.Allocator) !?Response {