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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/intents/cws_intents_registry.h"
#include "base/callback.h"
#include "base/json/json_value_serializer.h"
#include "base/memory/scoped_ptr.h"
#include "base/stl_util.h"
#include "base/string16.h"
#include "base/utf_string_conversions.h"
#include "chrome/browser/net/browser_url_util.h"
#include "chrome/browser/net/chrome_url_request_context.h"
#include "chrome/browser/webdata/web_data_service.h"
#include "content/public/common/url_fetcher.h"
#include "net/base/mime_util.h"
#include "net/base/load_flags.h"
namespace {
// URL for CWS intents API. TODO(groby): points to staging, fix for M18 release.
const char kCWSIntentServiceURL[] =
"https://www-googleapis-staging.sandbox.google.com"
"/chromewebstore/v1.1b/items/intent";
// Build a REST query URL to retrieve intent info from CWS.
GURL BuildQueryURL(const string16& action, const string16& type) {
GURL request(kCWSIntentServiceURL);
request = chrome_browser_net::AppendQueryParameter(request, "intent",
UTF16ToUTF8(action));
return chrome_browser_net::AppendQueryParameter(request, "mime_types",
UTF16ToUTF8(type));
}
} // namespace
// Internal object representing all data associated with a single query.
struct CWSIntentsRegistry::IntentsQuery {
// Underlying URL request query.
scoped_ptr<content::URLFetcher> url_fetcher_;
// The callback - invoked on completed retrieval.
ResultsCallback callback_;
};
CWSIntentsRegistry::CWSIntentsRegistry(net::URLRequestContextGetter* context)
: request_context_(context) {
}
CWSIntentsRegistry::~CWSIntentsRegistry() {
// Cancel all pending queries, since we can't handle them any more.
STLDeleteValues(&queries_);
}
void CWSIntentsRegistry::OnURLFetchComplete(const content::URLFetcher* source) {
DCHECK(source);
URLFetcherHandle handle = reinterpret_cast<URLFetcherHandle>(source);
QueryMap::iterator it = queries_.find(handle);
DCHECK(it != queries_.end());
scoped_ptr<IntentsQuery> query(it->second);
DCHECK(query != NULL);
queries_.erase(it);
std::string response;
source->GetResponseAsString(&response);
// TODO(groby): Do we really only accept 200, or any 2xx codes?
if (source->GetResponseCode() != 200)
return;
std::string error;
scoped_ptr<Value> parsed_response;
JSONStringValueSerializer serializer(response);
parsed_response.reset(serializer.Deserialize(NULL, &error));
if (parsed_response == NULL)
return;
DictionaryValue* response_dict;
parsed_response->GetAsDictionary(&response_dict);
if (!response_dict)
return;
ListValue* items;
if (!response_dict->GetList("items",&items))
return;
IntentExtensionList intents;
for (ListValue::const_iterator iter(items->begin());
iter != items->end(); ++iter) {
DictionaryValue* item = static_cast<DictionaryValue*>(*iter);
// All fields are mandatory - skip this result if we can't find a field.
IntentExtensionInfo info;
if (!item->GetInteger("num_ratings", &info.num_ratings))
continue;
if (!item->GetDouble("average_rating", &info.average_rating))
continue;
if (!item->GetString("manifest", &info.manifest))
continue;
string16 url_string;
if (!item->GetString("icon_url", &url_string))
continue;
info.icon_url = GURL(url_string);
intents.push_back(info);
}
if (!query->callback_.is_null())
query->callback_.Run(intents);
}
void CWSIntentsRegistry::GetIntentProviders(
const string16& action, const string16& mimetype,
const ResultsCallback& cb) {
scoped_ptr<IntentsQuery> query(new IntentsQuery);
query->callback_ = cb;
query->url_fetcher_.reset(content::URLFetcher::Create(
0, BuildQueryURL(action,mimetype), content::URLFetcher::GET, this));
if (query->url_fetcher_ == NULL)
return;
query->url_fetcher_->SetRequestContext(request_context_);
query->url_fetcher_->SetLoadFlags(
net::LOAD_DO_NOT_SEND_COOKIES | net::LOAD_DO_NOT_SAVE_COOKIES);
URLFetcherHandle handle = reinterpret_cast<URLFetcherHandle>(
query->url_fetcher_.get());
queries_[handle] = query.release();
queries_[handle]->url_fetcher_->Start();
}
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