<script type=webbundle>: Resolve a relative URL on the bundle's URL

The explainer PR is: WICG/webpackage#700 One of the gaps between the Subresource Loading with WebBundles and Bundle Preloading proposals is "how to resolve a relative URL of resources". The former is using document's base URL, and the latter is using the bundle's URL. We have to align. At the era of <link>-based API, using a document's base URL might make sense because `resources` are specified in the link element's attribute. Now we use <script>-based APIs, and `resources` is specified in JSON, so we no longer have any strong reason to use a document's base URL. See the spec discussion for details: WICG/webpackage#699 (comment) Bug: 1263807 Change-Id: Ic71f095589daa42db2d4649e2cf77212616b2f25 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3244822 Reviewed-by: Kunihiko Sakamoto <ksakamoto@chromium.org> Commit-Queue: Hayato Ito <hayato@chromium.org> Cr-Commit-Position: refs/heads/main@{#935333}
Gabisampaio · Nov 18, 2021 · ea6e807 · ea6e807
1 parent 690ae81
commit ea6e807
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Showing 5 changed files with 207 additions and 29 deletions.
diff --git a/web-bundle/subresource-loading/script-relative-url-resources.https.tentative.html b/web-bundle/subresource-loading/script-relative-url-resources.https.tentative.html
@@ -0,0 +1,81 @@
+<!DOCTYPE html>
+<title>Subresource loading using relative URLs in the 'resources'</title>
+<link
+  rel="help"
+  href="https://github.com/WICG/webpackage/blob/main/explainers/subresource-loading.md"
+/>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="../resources/test-helpers.js"></script>
+
+<script>
+  window.TEST_WEB_BUNDLE_ELEMENT_TYPE = "script";
+  setup(() => {
+    assert_true(HTMLScriptElement.supports("webbundle"));
+  });
+</script>
+<body>
+  <script>
+    let script;
+
+    function cleanUp() {
+      if (script) {
+        script.remove();
+      }
+    }
+
+    function createScriptWebBundle(resource) {
+      return createWebBundleElement(
+        "../resources/wbn/subresource.wbn",
+        /*resources=*/ [resource]
+      );
+    }
+
+    async function assertResourceCanBeFetched() {
+      const response = await fetch(`../resources/wbn/root.js`);
+      const text = await response.text();
+      assert_equals(text, "export * from './submodule.js';\n");
+    }
+
+    async function assertResourceNotFound() {
+      const response = await fetch(`../resources/wbn/root.js`);
+      const status = await response.status;
+      assert_equals(status, 404);
+    }
+
+    promise_test(async (t) => {
+      t.add_cleanup(cleanUp);
+      script = createScriptWebBundle("root.js");
+      document.body.append(script);
+      await assertResourceCanBeFetched();
+    }, "A relative URL, 'root.js', should be resolved on the bundle's URL");
+
+    promise_test(async (t) => {
+      t.add_cleanup(cleanUp);
+      script = createScriptWebBundle("./root.js");
+      document.body.append(script);
+      await assertResourceCanBeFetched();
+    }, "Use './root.js', starting with dot");
+
+    promise_test(async (t) => {
+      t.add_cleanup(cleanUp);
+      script = createScriptWebBundle("../wbn/root.js");
+      document.body.append(script);
+      await assertResourceCanBeFetched();
+    }, "Use '../wbn/root.js', starting with two dots");
+
+    promise_test(async (t) => {
+      t.add_cleanup(cleanUp);
+      script = createScriptWebBundle("/web-bundle/resources/wbn/root.js");
+      document.body.append(script);
+      await assertResourceCanBeFetched();
+    }, "Use '/web-bundle/resources/wbn/root.js', starting with slash");
+
+    promise_test(async (t) => {
+      t.add_cleanup(cleanUp);
+      script = createScriptWebBundle("unrelated-relative-url.js");
+      document.body.append(script);
+      await assertResourceNotFound();
+    }, "A resource should not be found");
+  </script>
+</body>
diff --git a/web-bundle/subresource-loading/script-relative-url-scopes.https.tentative.html b/web-bundle/subresource-loading/script-relative-url-scopes.https.tentative.html
@@ -0,0 +1,84 @@
+<!DOCTYPE html>
+<title>
+  Subresource loading using relative URLs in the 'scopes'
+</title>
+<link
+  rel="help"
+  href="https://github.com/WICG/webpackage/blob/main/explainers/subresource-loading.md"
+/>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="../resources/test-helpers.js"></script>
+
+<script>
+  window.TEST_WEB_BUNDLE_ELEMENT_TYPE = "script";
+  setup(() => {
+    assert_true(HTMLScriptElement.supports("webbundle"));
+  });
+</script>
+<body>
+  <script>
+    let script;
+
+    function cleanUp() {
+      if (script) {
+        script.remove();
+      }
+    }
+
+    function createScriptWebBundle(scope) {
+      return createWebBundleElement(
+        "../resources/wbn/relative-url.wbn",
+        /*resources=*/ [],
+        { scopes: [scope] }
+      );
+    }
+
+    async function assertResourceCanBeFetched() {
+      const response = await fetch("../resources/wbn/relative-url/subdirectory-path.js");
+      const text = await response.text();
+      assert_equals(text, "scriptLoaded('subdirectory-path.js');");
+    }
+
+    async function assertResourceNotFound() {
+      const response = await fetch("../resources/wbn/relative-url/subdirectory-path.js");
+      const status = await response.status;
+      assert_equals(status, 404);
+    }
+
+    promise_test(async (t) => {
+      t.add_cleanup(cleanUp);
+      script = createScriptWebBundle("relative-url");
+      document.body.append(script);
+      await assertResourceCanBeFetched();
+    }, "A relative URL, 'relative-url', should be resolved on the bundle's URL");
+
+    promise_test(async (t) => {
+      t.add_cleanup(cleanUp);
+      script = createScriptWebBundle("./relative-url");
+      document.body.append(script);
+      await assertResourceCanBeFetched();
+    }, "Use './relative-url', starting with dot");
+
+    promise_test(async (t) => {
+      t.add_cleanup(cleanUp);
+      script = createScriptWebBundle("../wbn/relative-url");
+      document.body.append(script);
+      await assertResourceCanBeFetched();
+    }, "Use '../wbn/relative-url', starting with two dots");
+
+    promise_test(async (t) => {
+      t.add_cleanup(cleanUp);
+      script = createScriptWebBundle("/web-bundle/resources/wbn/relative-url");
+      document.body.append(script);
+      await assertResourceCanBeFetched();
+    }, "Use '/web-bundle/resources/wbn/relative-url', starting with slash");
+
+    promise_test(async (t) => {
+      t.add_cleanup(cleanUp);
+      script = createScriptWebBundle("unrelated-scope");
+      document.body.append(script);
+      await assertResourceNotFound();
+    }, "A resource should not be found");
+  </script>
+</body>
diff --git a/web-bundle/subresource-loading/script-relative-url-static-element.https.tentative.html b/web-bundle/subresource-loading/script-relative-url-static-element.https.tentative.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<title>WebBundle subresource loading with relative URLs for static elements</title>
+<link
+  rel="help"
+  href="https://github.com/WICG/webpackage/blob/main/explainers/subresource-loading.md"
+/>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<body>
+  <script type="webbundle">
+    {
+      "source": "../resources/wbn/static-element.wbn",
+      "resources": [
+        "static-element/resources/script.js"
+      ],
+      "scopes": [
+        "static-element/scopes"
+      ]
+    }
+  </script>
+  <script src="../resources/wbn/static-element/resources/script.js"></script>
+  <script src="../resources/wbn/static-element/scopes/script.js"></script>
+  <script src="../resources/wbn/static-element/out-of-scope/script.js"></script>
+  <script>
+    setup(() => {
+      assert_true(HTMLScriptElement.supports('webbundle'));
+    });
+    promise_test(async () => {
+      assert_equals(resources_script_result, 'loaded from webbundle');
+      assert_equals(scopes_script_result, 'loaded from webbundle');
+      assert_equals(out_of_scope_script_result, 'loaded from network');
+    }, 'Subresources from static elements should be loaded from web bundle.');
+  </script>
+</body>
diff --git a/web-bundle/subresource-loading/script-relative-url.https.tentative.html b/web-bundle/subresource-loading/script-relative-url.https.tentative.html
diff --git a/web-bundle/subresource-loading/script-reuse-web-bundle-resource.https.tentative.html b/web-bundle/subresource-loading/script-reuse-web-bundle-resource.https.tentative.html
@@ -16,8 +16,11 @@
     });
 
     const wbn_url = "../resources/wbn/subresource.wbn";
-    const resource1 = "../resources/wbn/root.js";
-    const resource2 = "../resources/wbn/submodule.js";
+    const resource1 = "root.js";
+    const resource2 = "submodule.js";
+
+    const resource1_url = `../resources/wbn/${resource1}`;
+    const resource2_url = `../resources/wbn/${resource2}`;
 
     let script1;
     let script2;
@@ -32,18 +35,18 @@
     }
 
     async function assertResource1CanBeFetched() {
-      const response = await fetch(resource1);
+      const response = await fetch(resource1_url);
       const text = await response.text();
       assert_equals(text, "export * from './submodule.js';\n");
     }
 
     async function assertResource1CanNotBeFetched() {
-      const response = await fetch(resource1);
+      const response = await fetch(resource1_url);
       assert_equals(response.status, 404);
     }
 
     async function assertResource2CanBeFetched() {
-      const response = await fetch(resource2);
+      const response = await fetch(resource2_url);
       const text = await response.text();
       assert_equals(text, "export const result = 'OK';\n");
     }