[Android WebView] Implement initial settings and callback support for Service Workers.

android_webview/java/src/org/chromium/android_webview/AwServiceWorkerController.java

Index: android_webview/java/src/org/chromium/android_webview/AwServiceWorkerController.java
diff --git a/android_webview/java/src/org/chromium/android_webview/AwServiceWorkerController.java b/android_webview/java/src/org/chromium/android_webview/AwServiceWorkerController.java
new file mode 100644
index 0000000000000000000000000000000000000000..699b0e97ec22a8025cc4058f8a4d5bd49d0176e6
--- /dev/null
+++ b/android_webview/java/src/org/chromium/android_webview/AwServiceWorkerController.java
@@ -0,0 +1,117 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.android_webview;
+
+import android.content.Context;
+
+/**
+ * Manages clients and settings for Service Workers.
+ */
+public class AwServiceWorkerController {
+    private AwServiceWorkerClient mServiceWorkerClient;
+    private AwContentsIoThreadClient mServiceWorkerIoThreadClient;
+    private AwContentsBackgroundThreadClient mServiceWorkerBackgroundThreadClient;
+    private AwServiceWorkerSettings mServiceWorkerSettings;
+    private AwBrowserContext mBrowserContext;
+
+    public AwServiceWorkerController(Context applicationContext, AwBrowserContext browserContext) {
+        mServiceWorkerSettings = new AwServiceWorkerSettings(applicationContext);
+        mBrowserContext = browserContext;
+    }
+
+    /**
+     * Returns the current settings for Service Worker.
+     */
+    public AwServiceWorkerSettings getAwServiceWorkerSettings() {
+        return mServiceWorkerSettings;
+    }
+
+    /**
+     * Set custom client to receive callbacks from Service Workers. Can be null.
+     */
+    public void setServiceWorkerClient(AwServiceWorkerClient client) {
+        mServiceWorkerClient = client;
+        if (client != null) {
+            mServiceWorkerBackgroundThreadClient = new ServiceWorkerBackgroundThreadClientImpl();
+            mServiceWorkerIoThreadClient = new ServiceWorkerIoThreadClientImpl();
+            AwContentsStatics.setServiceWorkerIoThreadClient(mServiceWorkerIoThreadClient,
+                    mBrowserContext);
+        } else {
+            mServiceWorkerBackgroundThreadClient = null;
+            mServiceWorkerIoThreadClient = null;
+            AwContentsStatics.setServiceWorkerIoThreadClient(null, mBrowserContext);
+        }
+    }
+
+    // Helper classes implementations
+
+    private class ServiceWorkerIoThreadClientImpl extends AwContentsIoThreadClient {
+        // All methods are called on the IO thread.
+
+        @Override
+        public int getCacheMode() {
+            return mServiceWorkerSettings.getCacheMode();
+        }
+
+        @Override
+        public AwContentsBackgroundThreadClient getBackgroundThreadClient() {
+            return mServiceWorkerBackgroundThreadClient;
+        }
+
+        @Override
+        public boolean shouldBlockContentUrls() {
+            return !mServiceWorkerSettings.getAllowContentAccess();
+        }
+
+        @Override
+        public boolean shouldBlockFileUrls() {
+            return !mServiceWorkerSettings.getAllowFileAccess();
+        }
+
+        @Override
+        public boolean shouldBlockNetworkLoads() {
+            return mServiceWorkerSettings.getBlockNetworkLoads();
+        }
+
+        @Override
+        public boolean shouldAcceptThirdPartyCookies() {
+            // We currently don't allow third party cookies in service workers,
+            // see e.g. AwCookieAccessPolicy::GetShouldAcceptThirdPartyCookies.
+            return false;
+        }
+
+        @Override
+        public void onDownloadStart(String url, String userAgent,
+                String contentDisposition, String mimeType, long contentLength) {}
+
+        @Override
+        public void newLoginRequest(String realm, String account, String args) {}
+
+        @Override
+        public void onReceivedError(AwContentsClient.AwWebResourceRequest request,
+                AwContentsClient.AwWebResourceError error) {
+            // TODO
+        }
+
+        @Override
+        public void onReceivedHttpError(AwContentsClient.AwWebResourceRequest request,
+                AwWebResourceResponse response) {
+            // TODO
+        }
+    }
+
+    private class ServiceWorkerBackgroundThreadClientImpl
+            extends AwContentsBackgroundThreadClient {
+        // All methods are called on the background thread.
+        @Override
+        public AwWebResourceResponse shouldInterceptRequest(
+                AwContentsClient.AwWebResourceRequest request) {
+            // TODO: Consider analogy with AwContentsClient, i.e.
+            //  - do we need an onloadresource callback?
+            //  - do we need to post an error if the response data == null?
+            return mServiceWorkerClient.shouldInterceptRequest(request);
+        }
+    }
+}