Bundle core applicatons in the shell.

shell/android/url_response_disk_cache_delegate_impl.cc

+// Copyright 2015 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.
+
+#include "shell/android/url_response_disk_cache_delegate_impl.h"
+
+#include <android/asset_manager.h>
+#include <android/asset_manager_jni.h>
+
+#include "base/android/jni_android.h"
+#include "base/bind.h"
+#include "base/callback_helpers.h"
+#include "base/files/file.h"
+#include "base/strings/string_util.h"
+#include "base/task_runner_util.h"
+
+namespace shell {
+
+namespace {
+const char kMojoApplicationSuffix[] = ".mojo";
+}  // namespace
+
+URLResponseDiskCacheDelegateImpl::URLResponseDiskCacheDelegateImpl(
+    Context* context,
+    jobject j_asset_manager)
+    : context_(context),
+      j_asset_manager_(base::android::AttachCurrentThread(), j_asset_manager),
+      asset_manager_(
+          AAssetManager_fromJava(base::android::AttachCurrentThread(),
+                                 j_asset_manager_.obj())) {}
+
+URLResponseDiskCacheDelegateImpl::~URLResponseDiskCacheDelegateImpl() {}
+
+void URLResponseDiskCacheDelegateImpl::GetInitialPath(
+    scoped_refptr<base::TaskRunner> task_runner,
+    const std::string& url,
+    const base::FilePath& target,
+    const base::Callback<void(bool)>& callback) {
+  PopulateAssetsIfNeeded();
+  if (url_to_asset_name_.find(url) == url_to_asset_name_.end()) {
+    callback.Run(false);
+    return;
+  }
+
+  PostTaskAndReplyWithResult(
+      task_runner.get(), FROM_HERE,
+      base::Bind(&URLResponseDiskCacheDelegateImpl::ExtractAsset,
+                 base::Unretained(this), url_to_asset_name_[url], target),
+      callback);
+}
+
+bool URLResponseDiskCacheDelegateImpl::ExtractAsset(
+    const std::string& asset_name,
+    const base::FilePath& target) {
+  AAsset* asset = AAssetManager_open(asset_manager_, asset_name.c_str(),
+                                     AASSET_MODE_STREAMING);
+  if (!asset)
+    return false;
+  base::ScopedClosureRunner cleanup(
+      base::Bind(&AAsset_close, base::Unretained(asset)));
+  base::File target_file(target,
+                         base::File::FLAG_CREATE | base::File::FLAG_WRITE);
+  if (!target_file.IsValid())
+    return false;
+  char buffer[4096];
+  int nb_read;
+  do {
+    nb_read = AAsset_read(asset, buffer, arraysize(buffer));
+    if (nb_read > 0) {
+      if (target_file.WriteAtCurrentPos(buffer, nb_read) != nb_read)
+        return false;
+    }
+  } while (nb_read > 0);
+  return nb_read == 0;
+}
+
+void URLResponseDiskCacheDelegateImpl::PopulateAssetsIfNeeded() {
+  if (url_to_asset_name_.empty()) {
+    AAssetDir* dir = AAssetManager_openDir(asset_manager_, "");
+    if (!dir)
+      return;
+    base::ScopedClosureRunner cleanup(
+        base::Bind(&AAssetDir_close, base::Unretained(dir)));
+    while (const char* filename = AAssetDir_getNextFileName(dir)) {
+      std::string file_name_string = filename;
+      if (EndsWith(file_name_string, kMojoApplicationSuffix, true)) {
+        std::string base_name = file_name_string.substr(
+            0,
+            file_name_string.size() - (arraysize(kMojoApplicationSuffix) - 1));
+        std::string url = context_->url_resolver()
+                              ->ResolveMojoURL(GURL("mojo:" + base_name))
+                              .spec();
+        url_to_asset_name_[url] = file_name_string;
+      }
+    }
+  }
+}
+
+}  // namespace shell