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Diffstat (limited to 'chrome/browser/extensions/convert_web_app.cc')
| -rw-r--r-- | chrome/browser/extensions/convert_web_app.cc | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/chrome/browser/extensions/convert_web_app.cc b/chrome/browser/extensions/convert_web_app.cc new file mode 100644 index 0000000..47a9143 --- /dev/null +++ b/chrome/browser/extensions/convert_web_app.cc @@ -0,0 +1,172 @@ +// Copyright (c) 2010 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 "chrome/browser/extensions/convert_web_app.h" + +#include <cmath> +#include <limits> +#include <string> +#include <vector> + +#include "base/base64.h" +#include "base/file_path.h" +#include "base/file_util.h" +#include "base/logging.h" +#include "base/path_service.h" +#include "base/scoped_temp_dir.h" +#include "base/sha2.h" +#include "base/stringprintf.h" +#include "base/time.h" +#include "base/utf_string_conversions.h" +#include "chrome/common/chrome_paths.h" +#include "chrome/common/extensions/extension.h" +#include "chrome/common/extensions/extension_constants.h" +#include "chrome/common/json_value_serializer.h" +#include "chrome/common/web_apps.h" +#include "gfx/codec/png_codec.h" +#include "googleurl/src/gurl.h" +#include "third_party/skia/include/core/SkBitmap.h" + +namespace keys = extension_manifest_keys; + +using base::Time; + +namespace { + +const char kIconsDirName[] = "_icons"; + +// Create the public key for the converted web app. +// +// Web apps are not signed, but the public key for an extension doubles as +// its unique identity, and we need one of those. A web app's unique identity +// is its manifest URL, so we hash that to create a public key. There will be +// no corresponding private key, which means that these extensions cannot be +// auto-updated using ExtensionUpdater. But Chrome does notice updates to the +// manifest and regenerates these extensions. +std::string GenerateKey(const GURL& manifest_url) { + char raw[base::SHA256_LENGTH] = {0}; + std::string key; + base::SHA256HashString(manifest_url.spec().c_str(), + raw, + base::SHA256_LENGTH); + base::Base64Encode(std::string(raw, base::SHA256_LENGTH), &key); + return key; +} + +} + + +// Generates a version for the converted app using the current date. This isn't +// really needed, but it seems like useful information. +std::string ConvertTimeToExtensionVersion(const Time& create_time) { + Time::Exploded create_time_exploded; + create_time.UTCExplode(&create_time_exploded); + + double micros = static_cast<double>( + (create_time_exploded.millisecond * Time::kMicrosecondsPerMillisecond) + + (create_time_exploded.second * Time::kMicrosecondsPerSecond) + + (create_time_exploded.minute * Time::kMicrosecondsPerMinute) + + (create_time_exploded.hour * Time::kMicrosecondsPerHour)); + double day_fraction = micros / Time::kMicrosecondsPerDay; + double stamp = day_fraction * std::numeric_limits<uint16>::max(); + + // Ghetto-round, since VC++ doesn't have round(). + stamp = stamp >= (floor(stamp) + 0.5) ? (stamp + 1) : stamp; + + return base::StringPrintf("%i.%i.%i.%i", + create_time_exploded.year, + create_time_exploded.month, + create_time_exploded.day_of_month, + static_cast<uint16>(stamp)); +} + +scoped_refptr<Extension> ConvertWebAppToExtension( + const WebApplicationInfo& web_app, + const Time& create_time) { + FilePath user_data_temp_dir; + CHECK(PathService::Get(chrome::DIR_USER_DATA_TEMP, &user_data_temp_dir)); + + ScopedTempDir temp_dir; + if (!temp_dir.CreateUniqueTempDirUnderPath(user_data_temp_dir)) { + LOG(ERROR) << "Could not create temporary directory."; + return NULL; + } + + // Create the manifest + scoped_ptr<DictionaryValue> root(new DictionaryValue); + root->SetString(keys::kPublicKey, GenerateKey(web_app.manifest_url)); + root->SetString(keys::kName, UTF16ToUTF8(web_app.title)); + root->SetString(keys::kVersion, ConvertTimeToExtensionVersion(create_time)); + root->SetString(keys::kDescription, UTF16ToUTF8(web_app.description)); + root->SetString(keys::kLaunchWebURL, web_app.app_url.spec()); + + // Add the icons. + DictionaryValue* icons = new DictionaryValue(); + root->Set(keys::kIcons, icons); + for (size_t i = 0; i < web_app.icons.size(); ++i) { + std::string size = StringPrintf("%i", web_app.icons[i].width); + std::string icon_path = StringPrintf("%s/%s.png", kIconsDirName, + size.c_str()); + icons->SetString(size, icon_path); + } + + // Add the permissions. + ListValue* permissions = new ListValue(); + root->Set(keys::kPermissions, permissions); + for (size_t i = 0; i < web_app.permissions.size(); ++i) { + permissions->Append(Value::CreateStringValue(web_app.permissions[i])); + } + + // Add the URLs. + ListValue* urls = new ListValue(); + root->Set(keys::kWebURLs, urls); + for (size_t i = 0; i < web_app.urls.size(); ++i) { + urls->Append(Value::CreateStringValue(web_app.urls[i].spec())); + } + + // Write the manifest. + FilePath manifest_path = temp_dir.path().Append( + Extension::kManifestFilename); + JSONFileValueSerializer serializer(manifest_path); + if (!serializer.Serialize(*root)) { + LOG(ERROR) << "Could not serialize manifest."; + return NULL; + } + + // Write the icon files. + FilePath icons_dir = temp_dir.path().AppendASCII(kIconsDirName); + if (!file_util::CreateDirectory(icons_dir)) { + LOG(ERROR) << "Could not create icons directory."; + return NULL; + } + for (size_t i = 0; i < web_app.icons.size(); ++i) { + FilePath icon_file = icons_dir.AppendASCII( + StringPrintf("%i.png", web_app.icons[i].width)); + std::vector<unsigned char> image_data; + if (!gfx::PNGCodec::EncodeBGRASkBitmap(web_app.icons[i].data, + false, + &image_data)) { + LOG(ERROR) << "Could not create icon file."; + return NULL; + } + + const char* image_data_ptr = reinterpret_cast<const char*>(&image_data[0]); + if (!file_util::WriteFile(icon_file, image_data_ptr, image_data.size())) { + LOG(ERROR) << "Could not write icon file."; + return NULL; + } + } + + // Finally, create the extension object to represent the unpacked directory. + std::string error; + scoped_refptr<Extension> extension = Extension::Create( + temp_dir.path(), Extension::INTERNAL, *root, false, &error); + if (!extension) { + LOG(ERROR) << error; + return NULL; + } + + temp_dir.Take(); // The caller takes ownership of the directory. + return extension; +} |