build: add -Dx86 option to enable x86 backend

see https://ziglang.org/download/0.12.0/release-notes.html#x86-Backend

.github/actions/install/action.yml

@@ -1,23 +1,73 @@
 name: "Browsercore install"
 description: "Install deps for the project browsercore"
 
+inputs:
+  zig:
+    description: 'Zig version to install'
+    required: false
+    default: '0.13.0'
+  arch:
+    description: 'CPU arch used to select the v8 lib'
+    required: false
+    default: 'x86_64'
+  os:
+    description: 'OS used to select the v8 lib'
+    required: false
+    default: 'linux'
+  zig-v8:
+    description: 'zig v8 version to install'
+    required: false
+    default: 'v0.1.6'
+  v8:
+    description: 'v8 version to install'
+    required: false
+    default: '11.1.134'
+  cache-dir:
+    description: 'cache dir to use'
+    required: false
+    default: '~/.cache'
+
 runs:
   using: "composite"
 
   steps:
+    - name: Install apt deps
+      if: ${{ inputs.os == 'linux' }}
+      shell: bash
+      run: sudo apt-get install -y wget xz-utils python3 ca-certificates git pkg-config libglib2.0-dev gperf libexpat1-dev cmake clang
+
+    - uses: mlugg/setup-zig@v1
+      with:
+        version: ${{ inputs.zig }}
+
+    - name: Cache v8
+      id: cache-v8
+      uses: actions/cache@v4
+      env:
+        cache-name: cache-v8
+      with:
+        path: ${{ inputs.cache-dir }}/v8
+        key: libc_v8_${{ inputs.v8 }}_${{ inputs.os }}_${{ inputs.arch }}.a
+
+    - if: ${{ steps.cache-v8.outputs.cache-hit != 'true' }}
+      shell: bash
+      run: |
+        mkdir -p ${{ inputs.cache-dir }}/v8
+
+        wget -O ${{ inputs.cache-dir }}/v8/libc_v8.a https://github.com/lightpanda-io/zig-v8-fork/releases/download/${{ inputs.zig-v8 }}/libc_v8_${{ inputs.v8 }}_${{ inputs.os }}_${{ inputs.arch }}.a
+
     - name: install v8
       shell: bash
       run: |
-        mkdir -p vendor/zig-js-runtime/vendor/v8/${{env.ARCH}}/debug
-        ln -s /usr/local/lib/libc_v8.a vendor/zig-js-runtime/vendor/v8/${{env.ARCH}}/debug/libc_v8.a
+        mkdir -p vendor/zig-js-runtime/vendor/v8/${{inputs.arch}}-${{inputs.os}}/debug
+        ln -s ${{ inputs.cache-dir }}/v8/libc_v8.a vendor/zig-js-runtime/vendor/v8/${{inputs.arch}}-${{inputs.os}}/debug/libc_v8.a
 
-        mkdir -p vendor/zig-js-runtime/vendor/v8/${{env.ARCH}}/release
-        ln -s /usr/local/lib/libc_v8.a vendor/zig-js-runtime/vendor/v8/${{env.ARCH}}/release/libc_v8.a
+        mkdir -p vendor/zig-js-runtime/vendor/v8/${{inputs.arch}}-${{inputs.os}}/release
+        ln -s ${{ inputs.cache-dir }}/v8/libc_v8.a vendor/zig-js-runtime/vendor/v8/${{inputs.arch}}-${{inputs.os}}/release/libc_v8.a
 
     - name: libiconv
       shell: bash
-      run: |
-        ln -s /usr/local/lib/libiconv vendor/libiconv
+      run: make install-libiconv
 
     - name: build mimalloc
       shell: bash

.github/workflows/build.yml

@@ -0,0 +1,75 @@
+name: nightly build
+
+on:
+  schedule:
+    - cron: "2 2 * * *"
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+permissions:
+  contents: write
+
+jobs:
+  build-linux-x86_64:
+    env:
+      ARCH: x86_64
+      OS: linux
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          token: ${{ secrets.GH_CI_PAT }}
+          # fetch submodules recusively, to get zig-js-runtime submodules also.
+          submodules: recursive
+
+      - uses: ./.github/actions/install
+
+      - name: zig build
+        run: zig build --release=safe -Doptimize=ReleaseSafe -Dengine=v8 -Dcpu=x86_64
+
+      - name: Rename binary
+        run: mv zig-out/bin/browsercore-get lightpanda-get-${{ env.ARCH }}-${{ env.OS }}
+
+      - name: Upload the build
+        uses: ncipollo/release-action@v1
+        with:
+          allowUpdates: true
+          artifacts: lightpanda-get-${{ env.ARCH }}-${{ env.OS }}
+          tag: nightly
+
+  build-macos-aarch64:
+    env:
+      ARCH: aarch64
+      OS: macos
+
+    runs-on: macos-latest
+
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          token: ${{ secrets.GH_CI_PAT }}
+          # fetch submodules recusively, to get zig-js-runtime submodules also.
+          submodules: recursive
+
+      - uses: ./.github/actions/install
+        with:
+          os: ${{env.OS}}
+          arch: ${{env.ARCH}}
+
+      - name: zig build
+        run: zig build --release=safe -Doptimize=ReleaseSafe -Dengine=v8
+
+      - name: Rename binary
+        run: mv zig-out/bin/browsercore-get lightpanda-get-${{ env.ARCH }}-${{ env.OS }}
+
+      - name: Upload the build
+        uses: ncipollo/release-action@v1
+        with:
+          allowUpdates: true
+          artifacts: lightpanda-get-${{ env.ARCH }}-${{ env.OS }}
+          tag: nightly

.github/workflows/wpt.yml

@@ -1,7 +1,6 @@
 name: wpt
 
 env:
-  ARCH: x86_64-linux
   AWS_ACCESS_KEY_ID: ${{ vars.LPD_PERF_AWS_ACCESS_KEY_ID }}
   AWS_SECRET_ACCESS_KEY: ${{ secrets.LPD_PERF_AWS_SECRET_ACCESS_KEY }}
   AWS_BUCKET: ${{ vars.LPD_PERF_AWS_BUCKET }}
@@ -46,16 +45,6 @@ jobs:
     if: github.event.pull_request.draft == false
 
     runs-on: ubuntu-latest
-    container:
-      image: ghcr.io/lightpanda-io/zig-browsercore:0.12.1
-      credentials:
-       username: ${{ github.actor }}
-       password: ${{ secrets.GITHUB_TOKEN }}
-
-      # docker blocks io_uring syscalls by default now.
-      # see https://github.com/tigerbeetle/tigerbeetle/pull/1995
-      # see https://github.com/moby/moby/pull/46762
-      options: "--security-opt seccomp=unconfined"
 
     steps:
       - uses: actions/checkout@v4

.github/workflows/zig-fmt.yml

@@ -1,5 +1,8 @@
 name: zig-fmt
 
+env:
+  ZIG_VERSION: 0.13.0
+
 on:
   pull_request:
 
@@ -26,15 +29,12 @@ jobs:
     if: github.event.pull_request.draft == false
 
     runs-on: ubuntu-latest
-    container:
-      image: ghcr.io/lightpanda-io/zig:0.12.1
-      credentials:
-       username: ${{ github.actor }}
-       password: ${{ secrets.GITHUB_TOKEN }}
-    outputs:
-      zig_fmt_errs: ${{ steps.fmt.outputs.zig_fmt_errs }}
 
     steps:
+      - uses: mlugg/setup-zig@v1
+        with:
+          version: ${{ env.ZIG_VERSION }}
+
       - uses: actions/checkout@v4
         with:
           fetch-depth: 0

.github/workflows/zig-test.yml

@@ -1,7 +1,6 @@
 name: zig-test
 
 env:
-  ARCH: x86_64-linux
   AWS_ACCESS_KEY_ID: ${{ vars.LPD_PERF_AWS_ACCESS_KEY_ID }}
   AWS_SECRET_ACCESS_KEY: ${{ secrets.LPD_PERF_AWS_SECRET_ACCESS_KEY }}
   AWS_BUCKET: ${{ vars.LPD_PERF_AWS_BUCKET }}
@@ -44,11 +43,6 @@ jobs:
     if: github.event.pull_request.draft == false
 
     runs-on: ubuntu-latest
-    container:
-      image: ghcr.io/lightpanda-io/zig-browsercore:0.12.1
-      credentials:
-       username: ${{ github.actor }}
-       password: ${{ secrets.GITHUB_TOKEN }}
 
     steps:
       - uses: actions/checkout@v4
@@ -70,11 +64,6 @@ jobs:
     if: github.event_name != 'pull_request'
 
     runs-on: ubuntu-latest
-    container:
-      image: ghcr.io/lightpanda-io/zig-browsercore:0.12.1
-      credentials:
-       username: ${{ github.actor }}
-       password: ${{ secrets.GITHUB_TOKEN }}
 
     steps:
       - uses: actions/checkout@v4
@@ -96,16 +85,6 @@ jobs:
     if: github.event.pull_request.draft == false
 
     runs-on: ubuntu-latest
-    container:
-      image: ghcr.io/lightpanda-io/zig-browsercore:0.12.1
-      credentials:
-       username: ${{ github.actor }}
-       password: ${{ secrets.GITHUB_TOKEN }}
-
-      # docker blocks io_uring syscalls by default now.
-      # see https://github.com/tigerbeetle/tigerbeetle/pull/1995
-      # see https://github.com/moby/moby/pull/46762
-      options: "--security-opt seccomp=unconfined"
 
     steps:
       - uses: actions/checkout@v4

.gitignore

@@ -1,4 +1,5 @@
 zig-cache
+/.zig-cache/
 zig-out
 /vendor/netsurf/build/
 /vendor/netsurf/lib/

.gitmodules

@@ -22,3 +22,6 @@
 [submodule "vendor/mimalloc"]
 	path = vendor/mimalloc
 	url = git@github.com:microsoft/mimalloc.git
+[submodule "vendor/tls.zig"]
+	path = vendor/tls.zig
+	url = git@github.com:ianic/tls.zig.git

README.md

@@ -76,7 +76,7 @@ We do not provide yet binary versions of Lightpanda, you have to compile it from
 
 ### Prerequisites
 
-Lightpanda is written with [Zig](https://ziglang.org/) `0.12.1`. You have to
+Lightpanda is written with [Zig](https://ziglang.org/) `0.13.0`. You have to
 install it with the right version in order to build the project.
 
 Lightpanda also depends on

build.zig

@@ -47,6 +47,8 @@ pub fn build(b: *std.Build) !void {
 
     const options = try jsruntime.buildOptions(b);
 
+    const x86 = b.option(bool, "x86", "Use x86 backend") orelse false;
+
     // browser
     // -------
 
@@ -56,6 +58,8 @@ pub fn build(b: *std.Build) !void {
         .root_source_file = b.path("src/main.zig"),
         .target = target,
         .optimize = mode,
+        .use_llvm = !x86,
+        .use_lld = !x86,
     });
     try common(b, exe, options);
     b.installArtifact(exe);
@@ -79,6 +83,8 @@ pub fn build(b: *std.Build) !void {
         .root_source_file = b.path("src/main_shell.zig"),
         .target = target,
         .optimize = mode,
+        .use_llvm = !x86,
+        .use_lld = !x86,
     });
     try common(b, shell, options);
     try jsruntime_pkgs.add_shell(shell);
@@ -102,6 +108,8 @@ pub fn build(b: *std.Build) !void {
         .test_runner = b.path("src/test_runner.zig"),
         .target = target,
         .optimize = mode,
+        .use_llvm = !x86,
+        .use_lld = !x86,
     });
     try common(b, tests, options);
 
@@ -128,6 +136,8 @@ pub fn build(b: *std.Build) !void {
         .root_source_file = b.path("src/main_wpt.zig"),
         .target = target,
         .optimize = mode,
+        .use_llvm = !x86,
+        .use_lld = !x86,
     });
     try common(b, wpt, options);
 
@@ -149,6 +159,8 @@ pub fn build(b: *std.Build) !void {
         .root_source_file = b.path("src/main_get.zig"),
         .target = target,
         .optimize = mode,
+        .use_llvm = !x86,
+        .use_lld = !x86,
     });
     try common(b, get, options);
     b.installArtifact(get);
@@ -179,6 +191,11 @@ fn common(
     const netsurf = moduleNetSurf(b);
     netsurf.addImport("jsruntime", jsruntimemod);
     step.root_module.addImport("netsurf", netsurf);
+
+    const tlsmod = b.addModule("tls", .{
+        .root_source_file = b.path("vendor/tls.zig/src/main.zig"),
+    });
+    step.root_module.addImport("tls", tlsmod);
 }
 
 fn moduleNetSurf(b: *std.Build) *std.Build.Module {

src/async/Client.zig

@@ -35,7 +35,9 @@ const assert = std.debug.assert;
 const use_vectors = builtin.zig_backend != .stage2_x86_64;
 
 const Client = @This();
-const proto = http.protocol;
+const proto = std.http.protocol;
+
+const tls23 = @import("tls");
 
 const Loop = @import("jsruntime").Loop;
 const tcp = @import("tcp.zig");
@@ -217,7 +219,7 @@ pub const ConnectionPool = struct {
 pub const Connection = struct {
     stream: Stream,
     /// undefined unless protocol is tls.
-    tls_client: if (!disable_tls) *std.crypto.tls.Client else void,
+    tls_client: if (!disable_tls) *tls23.Connection(Stream) else void,
 
     /// The protocol that this connection is using.
     protocol: Protocol,
@@ -246,12 +248,12 @@ pub const Connection = struct {
     pub const Protocol = enum { plain, tls };
 
     pub fn readvDirectTls(conn: *Connection, buffers: []std.posix.iovec) ReadError!usize {
-        return conn.tls_client.readv(conn.stream, buffers) catch |err| {
+        return conn.tls_client.readv(buffers) catch |err| {
             // https://github.com/ziglang/zig/issues/2473
             if (mem.startsWith(u8, @errorName(err), "TlsAlert")) return error.TlsAlert;
 
             switch (err) {
-                error.TlsConnectionTruncated, error.TlsRecordOverflow, error.TlsDecodeError, error.TlsBadRecordMac, error.TlsBadLength, error.TlsIllegalParameter, error.TlsUnexpectedMessage => return error.TlsFailure,
+                error.TlsRecordOverflow, error.TlsBadRecordMac, error.TlsUnexpectedMessage => return error.TlsFailure,
                 error.ConnectionTimedOut => return error.ConnectionTimedOut,
                 error.ConnectionResetByPeer, error.BrokenPipe => return error.ConnectionResetByPeer,
                 else => return error.UnexpectedReadFailure,
@@ -278,7 +280,7 @@ pub const Connection = struct {
         if (conn.read_end != conn.read_start) return;
 
         var iovecs = [1]std.posix.iovec{
-            .{ .iov_base = &conn.read_buf, .iov_len = conn.read_buf.len },
+            .{ .base = &conn.read_buf, .len = conn.read_buf.len },
         };
         const nread = try conn.readvDirect(&iovecs);
         if (nread == 0) return error.EndOfStream;
@@ -314,8 +316,8 @@ pub const Connection = struct {
         }
 
         var iovecs = [2]std.posix.iovec{
-            .{ .iov_base = buffer.ptr, .iov_len = buffer.len },
-            .{ .iov_base = &conn.read_buf, .iov_len = conn.read_buf.len },
+            .{ .base = buffer.ptr, .len = buffer.len },
+            .{ .base = &conn.read_buf, .len = conn.read_buf.len },
         };
         const nread = try conn.readvDirect(&iovecs);
 
@@ -344,7 +346,7 @@ pub const Connection = struct {
     }
 
     pub fn writeAllDirectTls(conn: *Connection, buffer: []const u8) WriteError!void {
-        return conn.tls_client.writeAll(conn.stream, buffer) catch |err| switch (err) {
+        return conn.tls_client.writeAll(buffer) catch |err| switch (err) {
             error.BrokenPipe, error.ConnectionResetByPeer => return error.ConnectionResetByPeer,
             else => return error.UnexpectedWriteFailure,
         };
@@ -412,7 +414,7 @@ pub const Connection = struct {
             if (disable_tls) unreachable;
 
             // try to cleanly close the TLS connection, for any server that cares.
-            _ = conn.tls_client.writeEnd(conn.stream, "", true) catch {};
+            conn.tls_client.close() catch {};
             allocator.destroy(conn.tls_client);
         }
 
@@ -1376,13 +1378,13 @@ pub fn connectTcp(client: *Client, host: []const u8, port: u16, protocol: Connec
     if (protocol == .tls) {
         if (disable_tls) unreachable;
 
-        conn.data.tls_client = try client.allocator.create(std.crypto.tls.Client);
+        conn.data.tls_client = try client.allocator.create(tls23.Connection(Stream));
         errdefer client.allocator.destroy(conn.data.tls_client);
 
-        conn.data.tls_client.* = std.crypto.tls.Client.init(stream, client.ca_bundle, host) catch return error.TlsInitializationFailed;
-        // This is appropriate for HTTPS because the HTTP headers contain
-        // the content length which is used to detect truncation attacks.
-        conn.data.tls_client.allow_truncation_attacks = true;
+        conn.data.tls_client.* = tls23.client(stream, .{
+            .host = host,
+            .root_ca = client.ca_bundle,
+        }) catch return error.TlsInitializationFailed;
     }
 
     client.connection_pool.addUsed(conn);
@@ -1560,7 +1562,7 @@ pub const RequestOptions = struct {
 };
 
 fn validateUri(uri: Uri, arena: Allocator) !struct { Connection.Protocol, Uri } {
-    const protocol_map = std.ComptimeStringMap(Connection.Protocol, .{
+    const protocol_map = std.StaticStringMap(Connection.Protocol).initComptime(.{
         .{ "http", .plain },
         .{ "ws", .plain },
         .{ "https", .tls },

src/async/stream.zig

@@ -107,7 +107,7 @@ pub const Stream = struct {
     /// See equivalent function: `std.fs.File.writev`.
     pub fn writev(self: Stream, iovecs: []const posix.iovec_const) WriteError!usize {
         if (iovecs.len == 0) return 0;
-        const first_buffer = iovecs[0].iov_base[0..iovecs[0].iov_len];
+        const first_buffer = iovecs[0].base[0..iovecs[0].len];
         return try self.write(first_buffer);
     }
 
@@ -121,13 +121,13 @@ pub const Stream = struct {
         var i: usize = 0;
         while (true) {
             var amt = try self.writev(iovecs[i..]);
-            while (amt >= iovecs[i].iov_len) {
-                amt -= iovecs[i].iov_len;
+            while (amt >= iovecs[i].len) {
+                amt -= iovecs[i].len;
                 i += 1;
                 if (i >= iovecs.len) return;
             }
-            iovecs[i].iov_base += amt;
-            iovecs[i].iov_len -= amt;
+            iovecs[i].base += amt;
+            iovecs[i].len -= amt;
         }
     }
 };

src/browser/browser.zig

@@ -37,7 +37,7 @@ const Walker = @import("../dom/walker.zig").WalkerDepthFirst;
 
 const storage = @import("../storage/storage.zig");
 
-const FetchResult = std.http.Client.FetchResult;
+const FetchResult = @import("../http/Client.zig").Client.FetchResult;
 
 const UserContext = @import("../user_context.zig").UserContext;
 const HttpClient = @import("../async/Client.zig");
@@ -125,10 +125,10 @@ pub const Session = struct {
         self.env.deinit();
         self.arena.deinit();
 
-        self.loader.deinit();
-        self.loop.deinit();
-        self.storageShed.deinit();
         self.httpClient.deinit();
+        self.loader.deinit();
+        self.storageShed.deinit();
+        self.loop.deinit();
         self.alloc.destroy(self);
     }
 
@@ -198,22 +198,25 @@ pub const Page = struct {
     }
 
     pub fn wait(self: *Page) !void {
+
+        // try catch
+        var try_catch: jsruntime.TryCatch = undefined;
+        try_catch.init(self.session.env);
+        defer try_catch.deinit();
+
+        self.session.env.wait() catch |err| {
+            // the js env could not be started if the document wasn't an HTML.
+            if (err == error.EnvNotStarted) return;
+
             const alloc = self.arena.allocator();
-        var res = try self.session.env.waitTryCatch(alloc);
-        defer res.deinit(alloc);
-
-        if (res.success) {
-            log.debug("wait: {s}", .{res.result});
-        } else {
-            if (builtin.mode == .Debug and res.stack != null) {
-                log.info("wait: {s}", .{res.stack.?});
-            } else {
-                log.info("wait: {s}", .{res.result});
-            }
-        }
-
+            if (try try_catch.err(alloc, self.session.env)) |msg| {
+                defer alloc.free(msg);
+                log.info("wait error: {s}", .{msg});
                 return;
             }
+        };
+        log.debug("wait: OK", .{});
+    }
 
     // spec reference: https://html.spec.whatwg.org/#document-lifecycle
     pub fn navigate(self: *Page, uri: []const u8) !void {
@@ -322,7 +325,7 @@ pub const Page = struct {
         // start JS env
         // TODO load the js env concurrently with the HTML parsing.
         log.debug("start js env", .{});
-        try self.session.env.start(alloc);
+        try self.session.env.start();
 
         // replace the user context document with the new one.
         try self.session.env.setUserContext(.{
@@ -473,22 +476,26 @@ pub const Page = struct {
             return;
         }
 
+        var try_catch: jsruntime.TryCatch = undefined;
+        try_catch.init(self.session.env);
+        defer try_catch.deinit();
+
         const opt_text = try parser.nodeTextContent(parser.elementToNode(e));
         if (opt_text) |text| {
             // TODO handle charset attribute
-            var res = try self.session.env.execTryCatch(alloc, text, "");
-            defer res.deinit(alloc);
-
-            if (res.success) {
-                log.debug("eval inline: {s}", .{res.result});
-            } else {
-                if (builtin.mode == .Debug and res.stack != null) {
-                    log.info("eval inline: {s}", .{res.stack.?});
-                } else {
-                    log.info("eval inline: {s}", .{res.result});
-                }
+            const res = self.session.env.exec(text, "") catch {
+                if (try try_catch.err(alloc, self.session.env)) |msg| {
+                    defer alloc.free(msg);
+                    log.info("eval inline {s}: {s}", .{ text, msg });
                 }
+                return;
+            };
 
+            if (builtin.mode == .Debug) {
+                const msg = try res.toString(alloc, self.session.env);
+                defer alloc.free(msg);
+                log.debug("eval inline {s}", .{msg});
+            }
             return;
         }
 
@@ -530,18 +537,22 @@ pub const Page = struct {
         // check no body
         if (body.len == 0) return FetchError.NoBody;
 
-        var res = try self.session.env.execTryCatch(alloc, body, src);
-        defer res.deinit(alloc);
+        var try_catch: jsruntime.TryCatch = undefined;
+        try_catch.init(self.session.env);
+        defer try_catch.deinit();
 
-        if (res.success) {
-            log.debug("eval remote {s}: {s}", .{ src, res.result });
-        } else {
-            if (builtin.mode == .Debug and res.stack != null) {
-                log.info("eval remote {s}: {s}", .{ src, res.stack.? });
-            } else {
-                log.info("eval remote {s}: {s}", .{ src, res.result });
+        const res = self.session.env.exec(body, src) catch {
+            if (try try_catch.err(alloc, self.session.env)) |msg| {
+                defer alloc.free(msg);
+                log.info("eval remote {s}: {s}", .{ src, msg });
             }
             return FetchError.JsErr;
+        };
+
+        if (builtin.mode == .Debug) {
+            const msg = try res.toString(alloc, self.session.env);
+            defer alloc.free(msg);
+            log.debug("eval remote {s}: {s}", .{ src, msg });
         }
     }
 

src/browser/loader.zig

@@ -17,17 +17,18 @@
 // along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
 const std = @import("std");
+const Client = @import("../http/Client.zig");
 
 const user_agent = "Lightpanda.io/1.0";
 
 pub const Loader = struct {
-    client: std.http.Client,
-    // use 16KB for headers buffer size.
-    server_header_buffer: [1024 * 16]u8 = undefined,
+    client: Client,
+    // use 64KB for headers buffer size.
+    server_header_buffer: [1024 * 64]u8 = undefined,
 
     pub const Response = struct {
         alloc: std.mem.Allocator,
-        req: *std.http.Client.Request,
+        req: *Client.Request,
 
         pub fn deinit(self: *Response) void {
             self.req.deinit();
@@ -37,7 +38,7 @@ pub const Loader = struct {
 
     pub fn init(alloc: std.mem.Allocator) Loader {
         return Loader{
-            .client = std.http.Client{
+            .client = Client{
                 .allocator = alloc,
             },
         };
@@ -54,7 +55,7 @@ pub const Loader = struct {
     pub fn get(self: *Loader, alloc: std.mem.Allocator, uri: std.Uri) !Response {
         var resp = Response{
             .alloc = alloc,
-            .req = try alloc.create(std.http.Client.Request),
+            .req = try alloc.create(Client.Request),
         };
         errdefer alloc.destroy(resp.req);
 

src/html/window.zig

@@ -19,6 +19,10 @@
 const std = @import("std");
 
 const parser = @import("netsurf");
+const jsruntime = @import("jsruntime");
+const Callback = jsruntime.Callback;
+const CallbackArg = jsruntime.CallbackArg;
+const Loop = jsruntime.Loop;
 
 const EventTarget = @import("../dom/event_target.zig").EventTarget;
 
@@ -39,6 +43,11 @@ pub const Window = struct {
 
     storageShelf: ?*storage.Shelf = null,
 
+    // store a map between internal timeouts ids and pointers to uint.
+    // the maximum number of possible timeouts is fixed.
+    timeoutid: u32 = 0,
+    timeoutids: [512]u64 = undefined,
+
     pub fn create(target: ?[]const u8) Window {
         return Window{
             .target = target orelse "",
@@ -82,4 +91,26 @@ pub const Window = struct {
         if (self.storageShelf == null) return parser.DOMError.NotSupported;
         return &self.storageShelf.?.bucket.session;
     }
+
+    // TODO handle callback arguments.
+    pub fn _setTimeout(self: *Window, loop: *Loop, cbk: Callback, delay: ?u32) !u32 {
+        if (self.timeoutid >= self.timeoutids.len) return error.TooMuchTimeout;
+
+        const ddelay: u63 = delay orelse 0;
+        const id = loop.timeout(ddelay * std.time.ns_per_ms, cbk);
+
+        self.timeoutids[self.timeoutid] = id;
+        defer self.timeoutid += 1;
+
+        return self.timeoutid;
+    }
+
+    pub fn _clearTimeout(self: *Window, loop: *Loop, id: u32) void {
+        // I do would prefer return an error in this case, but it seems some JS
+        // uses invalid id, in particular id 0.
+        // So we silently ignore invalid id for now.
+        if (id >= self.timeoutid) return;
+
+        loop.cancel(self.timeoutids[id], null);
+    }
 };

src/main.zig

@@ -37,7 +37,7 @@ fn execJS(
     js_env: *jsruntime.Env,
 ) anyerror!void {
     // start JS env
-    try js_env.start(alloc);
+    try js_env.start();
     defer js_env.stop();
 
     // alias global as self and window
@@ -45,6 +45,11 @@ fn execJS(
     window.replaceDocument(doc);
     try js_env.bindGlobal(window);
 
+    // try catch
+    var try_catch: jsruntime.TryCatch = undefined;
+    try_catch.init(js_env.*);
+    defer try_catch.deinit();
+
     while (true) {
 
         // read cmd
@@ -57,11 +62,12 @@ fn execJS(
             break;
         }
 
-        const res = try js_env.execTryCatch(alloc, cmd, "cdp");
-        if (res.success) {
-            std.debug.print("-> {s}\n", .{res.result});
-        }
-        _ = try conn.stream.write(res.result);
+        const res = try js_env.exec(cmd, "cdp");
+        const res_str = try res.toString(alloc, js_env.*);
+        defer alloc.free(res_str);
+        std.debug.print("-> {s}\n", .{res_str});
+
+        _ = try conn.stream.write(res_str);
     }
 }
 

src/main_shell.zig

@@ -38,7 +38,7 @@ fn execJS(
     js_env: *jsruntime.Env,
 ) anyerror!void {
     // start JS env
-    try js_env.start(alloc);
+    try js_env.start();
     defer js_env.stop();
 
     var cli = Client{ .allocator = alloc, .loop = js_env.nat_ctx.loop };

src/main_wpt.zig

@@ -142,7 +142,7 @@ pub fn main() !void {
         defer arena.deinit();
 
         const res = wpt.run(&arena, wpt_dir, tc, &loader) catch |err| {
-            const suite = try Suite.init(alloc, tc, false, @errorName(err), null);
+            const suite = try Suite.init(alloc, tc, false, @errorName(err));
             try results.append(suite);
 
             if (out == .text) {
@@ -151,9 +151,9 @@ pub fn main() !void {
             failures += 1;
             continue;
         };
-        // no need to call res.deinit() thanks to the arena allocator.
+        defer res.deinit(arena.allocator());
 
-        const suite = try Suite.init(alloc, tc, res.success, res.result, res.stack);
+        const suite = try Suite.init(alloc, tc, res.ok, res.msg orelse "");
         try results.append(suite);
 
         if (out == .json) {
@@ -196,7 +196,7 @@ pub fn main() !void {
                 try cases.append(Case{
                     .pass = suite.pass,
                     .name = suite.name,
-                    .message = suite.stack orelse suite.message,
+                    .message = suite.message,
                 });
             }
 
@@ -288,7 +288,7 @@ fn runSafe(
         argv.appendAssumeCapacity(tc);
         defer _ = argv.pop();
 
-        const run = try std.ChildProcess.run(.{
+        const run = try std.process.Child.run(.{
             .allocator = alloc,
             .argv = argv.items,
             .max_output_bytes = 1024 * 1024,

src/run_tests.zig

@@ -71,7 +71,7 @@ fn testExecFn(
     defer parser.deinit();
 
     // start JS env
-    try js_env.start(alloc);
+    try js_env.start();
     defer js_env.stop();
 
     var storageShelf = storage.Shelf.init(alloc);

src/wpt/run.zig

@@ -36,7 +36,7 @@ const Client = @import("../async/Client.zig");
 // runWPT parses the given HTML file, starts a js env and run the first script
 // tags containing javascript sources.
 // It loads first the js libs files.
-pub fn run(arena: *std.heap.ArenaAllocator, comptime dir: []const u8, f: []const u8, loader: *FileLoader) !jsruntime.JSResult {
+pub fn run(arena: *std.heap.ArenaAllocator, comptime dir: []const u8, f: []const u8, loader: *FileLoader) !Res {
     const alloc = arena.allocator();
     try parser.init();
     defer parser.deinit();
@@ -70,15 +70,16 @@ pub fn run(arena: *std.heap.ArenaAllocator, comptime dir: []const u8, f: []const
     try js_env.load(&js_types);
 
     // start JS env
-    try js_env.start(alloc);
+    try js_env.start();
     defer js_env.stop();
 
     // display console logs
     defer {
-        var res = evalJS(js_env, alloc, "console.join('\\n');", "console") catch unreachable;
+        const res = evalJS(js_env, alloc, "console.join('\\n');", "console") catch unreachable;
         defer res.deinit(alloc);
-        if (res.result.len > 0) {
-            std.debug.print("-- CONSOLE LOG\n{s}\n--\n", .{res.result});
+
+        if (res.msg != null and res.msg.?.len > 0) {
+            std.debug.print("-- CONSOLE LOG\n{s}\n--\n", .{res.msg.?});
         }
     }
 
@@ -88,9 +89,6 @@ pub fn run(arena: *std.heap.ArenaAllocator, comptime dir: []const u8, f: []const
     window.setStorageShelf(&storageShelf);
     try js_env.bindGlobal(&window);
 
-    // thanks to the arena, we don't need to deinit res.
-    var res: jsruntime.JSResult = undefined;
-
     const init =
         \\console = [];
         \\console.log = function () {
@@ -100,10 +98,8 @@ pub fn run(arena: *std.heap.ArenaAllocator, comptime dir: []const u8, f: []const
         \\  console.push("debug", ...arguments);
         \\};
     ;
-    res = try evalJS(js_env, alloc, init, "init");
-    if (!res.success) {
-        return res;
-    }
+    var res = try evalJS(js_env, alloc, init, "init");
+    if (!res.ok) return res;
     res.deinit(alloc);
 
     // loop hover the scripts.
@@ -122,20 +118,14 @@ pub fn run(arena: *std.heap.ArenaAllocator, comptime dir: []const u8, f: []const
             }
 
             res = try evalJS(js_env, alloc, try loader.get(path), src);
-            if (!res.success) {
-                return res;
-            }
+            if (!res.ok) return res;
             res.deinit(alloc);
         }
 
         // If the script as a source text, execute it.
         const src = try parser.nodeTextContent(s) orelse continue;
         res = try evalJS(js_env, alloc, src, "");
-
-        // return the first failure.
-        if (!res.success) {
-            return res;
-        }
+        if (!res.ok) return res;
         res.deinit(alloc);
     }
 
@@ -150,25 +140,52 @@ pub fn run(arena: *std.heap.ArenaAllocator, comptime dir: []const u8, f: []const
     );
 
     // wait for all async executions
-    res = try js_env.waitTryCatch(alloc);
-    if (!res.success) {
-        return res;
-    }
-    res.deinit(alloc);
+    var try_catch: jsruntime.TryCatch = undefined;
+    try_catch.init(js_env);
+    defer try_catch.deinit();
+    js_env.wait() catch {
+        return .{
+            .ok = false,
+            .msg = try try_catch.err(alloc, js_env),
+        };
+    };
 
     // Check the final test status.
     res = try evalJS(js_env, alloc, "report.status;", "teststatus");
-    if (!res.success) {
-        return res;
-    }
+    if (!res.ok) return res;
     res.deinit(alloc);
 
     // return the detailed result.
     return try evalJS(js_env, alloc, "report.log", "teststatus");
 }
 
-fn evalJS(env: jsruntime.Env, alloc: std.mem.Allocator, script: []const u8, name: ?[]const u8) !jsruntime.JSResult {
-    return try env.execTryCatch(alloc, script, name);
+pub const Res = struct {
+    ok: bool,
+    msg: ?[]const u8,
+
+    pub fn deinit(res: Res, alloc: std.mem.Allocator) void {
+        if (res.msg) |msg| {
+            alloc.free(msg);
+        }
+    }
+};
+
+fn evalJS(env: jsruntime.Env, alloc: std.mem.Allocator, script: []const u8, name: ?[]const u8) !Res {
+    var try_catch: jsruntime.TryCatch = undefined;
+    try_catch.init(env);
+    defer try_catch.deinit();
+
+    const v = env.exec(script, name) catch {
+        return .{
+            .ok = false,
+            .msg = try try_catch.err(alloc, env),
+        };
+    };
+
+    return .{
+        .ok = true,
+        .msg = try v.toString(alloc, env),
+    };
 }
 
 // browse the path to find the tests list.

src/wpt/testcase.zig

@@ -67,28 +67,22 @@ pub const Suite = struct {
     pass: bool,
     name: []const u8,
     message: ?[]const u8,
-    stack: ?[]const u8,
     cases: ?[]Case,
 
     // caller owns the wpt.Suite.
     // owner must call deinit().
-    pub fn init(alloc: std.mem.Allocator, name: []const u8, pass: bool, res: []const u8, stack: ?[]const u8) !Suite {
+    pub fn init(alloc: std.mem.Allocator, name: []const u8, pass: bool, res: []const u8) !Suite {
         var suite = Suite{
             .alloc = alloc,
             .pass = false,
             .name = try alloc.dupe(u8, name),
             .message = null,
-            .stack = null,
             .cases = null,
         };
 
         // handle JS error.
         if (!pass) {
             suite.message = try alloc.dupe(u8, res);
-            if (stack) |st| {
-                suite.stack = try alloc.dupe(u8, st);
-            }
-
             return suite;
         }
 
@@ -155,10 +149,6 @@ pub const Suite = struct {
     pub fn deinit(self: Suite) void {
         self.alloc.free(self.name);
 
-        if (self.stack) |stack| {
-            self.alloc.free(stack);
-        }
-
         if (self.message) |res| {
             self.alloc.free(res);
         }
@@ -175,9 +165,6 @@ pub const Suite = struct {
         if (self.message) |v| {
             return v;
         }
-        if (self.stack) |v| {
-            return v;
-        }
         return "";
     }
 };
@@ -199,7 +186,7 @@ test "success test case" {
         ,
     };
 
-    const suite = Suite.init(alloc, "foo", res.pass, res.result, null) catch unreachable; // TODO
+    const suite = Suite.init(alloc, "foo", res.pass, res.result) catch unreachable; // TODO
     defer suite.deinit();
 
     try testing.expect(suite.pass == true);
@@ -226,7 +213,7 @@ test "failed test case" {
         ,
     };
 
-    const suite = Suite.init(alloc, "foo", res.pass, res.result, null) catch unreachable; // TODO
+    const suite = Suite.init(alloc, "foo", res.pass, res.result) catch unreachable; // TODO
     defer suite.deinit();
 
     try testing.expect(suite.pass == false);
@@ -251,7 +238,7 @@ test "invalid result" {
         ,
     };
 
-    const suite = Suite.init(alloc, "foo", res.pass, res.result, null) catch unreachable; // TODO
+    const suite = Suite.init(alloc, "foo", res.pass, res.result) catch unreachable; // TODO
     defer suite.deinit();
 
     try testing.expect(suite.pass == false);
@@ -266,7 +253,7 @@ test "invalid result" {
         ,
     };
 
-    const suite2 = Suite.init(alloc, "foo", res2.pass, res2.result, null) catch unreachable; // TODO
+    const suite2 = Suite.init(alloc, "foo", res2.pass, res2.result) catch unreachable; // TODO
     defer suite2.deinit();
 
     try testing.expect(suite2.pass == false);