feat(app,module): fetch basic module

misc/client-sdk-testsuite/src/public/index.html

@@ -26,6 +26,7 @@
     <script src="/test/rpc-module.js"></script>
     <script src="/test/file-module.js"></script>
     <script src="/test/app-module.js"></script>
+    <script src="/test/fetch-module.js"></script>
     <script class="mocha-exec">
       mocha.run();
     </script>

misc/client-sdk-testsuite/src/public/test/fetch-module.js

@@ -0,0 +1,33 @@
+describe('Fetch Module', function () {
+
+    before(() => {
+        return Edge.connect();
+    });
+
+    after(() => {
+        Edge.disconnect();
+    });
+
+    it('should fetch an authorized external url', function () {
+        var externalUrl = Edge.externalUrl("http://example.com");
+
+        return fetch(externalUrl)
+            .then(res => {
+                chai.assert.equal(res.status, 200)
+                return res.text()
+            })
+            .then(content => {
+                chai.assert.include(content, '<h1>Example Domain</h1>')
+            })
+    });
+
+    it('should not fetch an unauthorized external url', function () {
+        var externalUrl = Edge.externalUrl("https://google.com");
+
+        return fetch(externalUrl)
+            .then(res => {
+                chai.assert.equal(res.status, 403)
+            })
+    });
+
+});

misc/client-sdk-testsuite/src/server/main.js

@@ -97,4 +97,8 @@ function getApp(ctx, params) {
 function getAppUrl(ctx, params) {
   var appId = params.appId;
   return app.getUrl(ctx, appId);
+}
+
+function onClientFetch(ctx, url, remoteAddr) {
+  return { allow: url === 'http://example.com' };
 }