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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/browser/plugin_finder.h"
#include "base/bind.h"
#include "base/json/json_reader.h"
#include "base/message_loop.h"
#include "base/stl_util.h"
#include "base/values.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/plugin_installer.h"
#include "chrome/browser/prefs/pref_service.h"
#include "chrome/common/pref_names.h"
#include "content/public/browser/browser_thread.h"
#include "googleurl/src/gurl.h"
#include "grit/browser_resources.h"
#include "ui/base/resource/resource_bundle.h"
using base::DictionaryValue;
// static
void PluginFinder::Get(const base::Callback<void(PluginFinder*)>& cb) {
// At a later point we might want to do intialization here that needs to be
// done asynchronously, like loading the plug-in list from disk or from a URL.
MessageLoop::current()->PostTask(FROM_HERE, base::Bind(cb, GetInstance()));
}
// static
PluginFinder* PluginFinder::GetInstance() {
// PluginFinder::GetInstance() is the only method that's allowed to call
// Singleton<PluginFinder>::get().
return Singleton<PluginFinder>::get();
}
PluginFinder::PluginFinder() : plugin_list_(LoadPluginList()) {
if (!plugin_list_.get())
plugin_list_.reset(new DictionaryValue());
}
// static
DictionaryValue* PluginFinder::LoadPluginList() {
#if defined(OS_WIN) || defined(OS_MACOSX) || defined(OS_LINUX)
base::StringPiece json_resource(
ResourceBundle::GetSharedInstance().GetRawDataResource(
IDR_PLUGIN_DB_JSON));
std::string error_str;
scoped_ptr<base::Value> value(base::JSONReader::ReadAndReturnError(
json_resource.as_string(),
base::JSON_PARSE_RFC,
NULL,
&error_str));
if (!value.get()) {
DLOG(ERROR) << error_str;
return NULL;
}
if (value->GetType() != base::Value::TYPE_DICTIONARY)
return NULL;
return static_cast<base::DictionaryValue*>(value.release());
#else
return new DictionaryValue();
#endif
}
PluginFinder::~PluginFinder() {
STLDeleteValues(&installers_);
}
PluginInstaller* PluginFinder::FindPlugin(const std::string& mime_type,
const std::string& language) {
if (g_browser_process->local_state()->GetBoolean(prefs::kDisablePluginFinder))
return NULL;
for (DictionaryValue::Iterator plugin_it(*plugin_list_);
plugin_it.HasNext(); plugin_it.Advance()) {
const DictionaryValue* plugin = NULL;
if (!plugin_it.value().GetAsDictionary(&plugin)) {
NOTREACHED();
continue;
}
std::string language_str;
bool success = plugin->GetString("lang", &language_str);
DCHECK(success);
if (language_str != language)
continue;
ListValue* mime_types = NULL;
plugin->GetList("mime_types", &mime_types);
DCHECK(success);
for (ListValue::const_iterator mime_type_it = mime_types->begin();
mime_type_it != mime_types->end(); ++mime_type_it) {
std::string mime_type_str;
success = (*mime_type_it)->GetAsString(&mime_type_str);
DCHECK(success);
if (mime_type_str == mime_type) {
std::string identifier = plugin_it.key();
std::map<std::string, PluginInstaller*>::const_iterator installer =
installers_.find(identifier);
if (installer != installers_.end())
return installer->second;
return CreateInstaller(identifier, plugin);
}
}
}
return NULL;
}
PluginInstaller* PluginFinder::FindPluginWithIdentifier(
const std::string& identifier) {
std::map<std::string, PluginInstaller*>::const_iterator it =
installers_.find(identifier);
if (it != installers_.end())
return it->second;
DictionaryValue* plugin = NULL;
if (plugin_list_->GetDictionaryWithoutPathExpansion(identifier, &plugin))
return CreateInstaller(identifier, plugin);
return NULL;
}
PluginInstaller* PluginFinder::CreateInstaller(
const std::string& identifier,
const DictionaryValue* plugin_dict) {
DCHECK(!installers_[identifier]);
std::string url;
bool success = plugin_dict->GetString("url", &url);
DCHECK(success);
std::string help_url;
plugin_dict->GetString("help_url", &help_url);
string16 name;
success = plugin_dict->GetString("name", &name);
DCHECK(success);
bool display_url = false;
plugin_dict->GetBoolean("displayurl", &display_url);
bool requires_authorization = true;
plugin_dict->GetBoolean("requires_authorization", &requires_authorization);
PluginInstaller* installer = new PluginInstaller(identifier,
GURL(url),
GURL(help_url),
name,
display_url,
requires_authorization);
installers_[identifier] = installer;
return installer;
}
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