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// Copyright (c) 2012 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/common/extensions/manifest.h"
#include "base/basictypes.h"
#include "base/lazy_instance.h"
#include "base/logging.h"
#include "base/string_split.h"
#include "base/stringprintf.h"
#include "base/utf_string_conversions.h"
#include "chrome/common/extensions/extension_manifest_constants.h"
#include "chrome/common/extensions/extension_error_utils.h"
#include "chrome/common/extensions/features/simple_feature_provider.h"
namespace errors = extension_manifest_errors;
namespace keys = extension_manifest_keys;
namespace extensions {
Manifest::Manifest(Extension::Location location,
scoped_ptr<DictionaryValue> value)
: location_(location),
value_(value.Pass()),
type_(Extension::TYPE_UNKNOWN) {
if (value_->HasKey(keys::kTheme)) {
type_ = Extension::TYPE_THEME;
} else if (value_->HasKey(keys::kApp)) {
if (value_->Get(keys::kWebURLs, NULL) ||
value_->Get(keys::kLaunchWebURL, NULL)) {
type_ = Extension::TYPE_HOSTED_APP;
} else if (value_->Get(keys::kPlatformAppBackground, NULL)) {
type_ = Extension::TYPE_PLATFORM_APP;
} else {
type_ = Extension::TYPE_LEGACY_PACKAGED_APP;
}
} else {
type_ = Extension::TYPE_EXTENSION;
}
CHECK_NE(type_, Extension::TYPE_UNKNOWN);
}
Manifest::~Manifest() {
}
void Manifest::ValidateManifest(
std::string* error,
Extension::InstallWarningVector* warnings) const {
*error = "";
if (type_ == Extension::TYPE_PLATFORM_APP && GetManifestVersion() < 2) {
*error = errors::kPlatformAppNeedsManifestVersion2;
return;
}
// Check every feature to see if its in the manifest. Note that this means
// we will ignore keys that are not features; we do this for forward
// compatibility.
// TODO(aa): Consider having an error here in the case of strict error
// checking to let developers know when they screw up.
std::set<std::string> feature_names =
SimpleFeatureProvider::GetManifestFeatures()->GetAllFeatureNames();
for (std::set<std::string>::iterator feature_name = feature_names.begin();
feature_name != feature_names.end(); ++feature_name) {
// Use Get instead of HasKey because the former uses path expansion.
if (!value_->Get(*feature_name, NULL))
continue;
Feature* feature =
SimpleFeatureProvider::GetManifestFeatures()->GetFeature(*feature_name);
Feature::Availability result = feature->IsAvailableToManifest(
extension_id_, type_, Feature::ConvertLocation(location_),
GetManifestVersion());
if (!result.is_available())
warnings->push_back(Extension::InstallWarning(
Extension::InstallWarning::FORMAT_TEXT, result.message()));
}
// Also generate warnings for keys that are not features.
for (DictionaryValue::key_iterator key = value_->begin_keys();
key != value_->end_keys(); ++key) {
if (!SimpleFeatureProvider::GetManifestFeatures()->GetFeature(*key)) {
warnings->push_back(Extension::InstallWarning(
Extension::InstallWarning::FORMAT_TEXT,
base::StringPrintf("Unrecognized manifest key '%s'.",
(*key).c_str())));
}
}
}
bool Manifest::HasKey(const std::string& key) const {
return CanAccessKey(key) && value_->HasKey(key);
}
bool Manifest::HasPath(const std::string& path) const {
Value* ignored = NULL;
return CanAccessPath(path) && value_->Get(path, &ignored);
}
bool Manifest::Get(
const std::string& path, Value** out_value) const {
return CanAccessPath(path) && value_->Get(path, out_value);
}
bool Manifest::GetBoolean(
const std::string& path, bool* out_value) const {
return CanAccessPath(path) && value_->GetBoolean(path, out_value);
}
bool Manifest::GetInteger(
const std::string& path, int* out_value) const {
return CanAccessPath(path) && value_->GetInteger(path, out_value);
}
bool Manifest::GetString(
const std::string& path, std::string* out_value) const {
return CanAccessPath(path) && value_->GetString(path, out_value);
}
bool Manifest::GetString(
const std::string& path, string16* out_value) const {
return CanAccessPath(path) && value_->GetString(path, out_value);
}
bool Manifest::GetDictionary(
const std::string& path, DictionaryValue** out_value) const {
return CanAccessPath(path) && value_->GetDictionary(path, out_value);
}
bool Manifest::GetList(
const std::string& path, ListValue** out_value) const {
return CanAccessPath(path) && value_->GetList(path, out_value);
}
Manifest* Manifest::DeepCopy() const {
Manifest* manifest = new Manifest(
location_, scoped_ptr<DictionaryValue>(value_->DeepCopy()));
manifest->set_extension_id(extension_id_);
return manifest;
}
bool Manifest::Equals(const Manifest* other) const {
return other && value_->Equals(other->value());
}
int Manifest::GetManifestVersion() const {
// Platform apps were launched after manifest version 2 was the preferred
// version, so they default to that.
int manifest_version = type_ == Extension::TYPE_PLATFORM_APP ? 2 : 1;
value_->GetInteger(keys::kManifestVersion, &manifest_version);
return manifest_version;
}
bool Manifest::CanAccessPath(const std::string& path) const {
std::vector<std::string> components;
base::SplitString(path, '.', &components);
std::string key;
for (size_t i = 0; i < components.size(); ++i) {
key += components[i];
if (!CanAccessKey(key))
return false;
key += '.';
}
return true;
}
bool Manifest::CanAccessKey(const std::string& key) const {
Feature* feature =
SimpleFeatureProvider::GetManifestFeatures()->GetFeature(key);
if (!feature)
return true;
return feature->IsAvailableToManifest(
extension_id_, type_, Feature::ConvertLocation(location_),
GetManifestVersion()).is_available();
}
} // namespace extensions
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