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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/net/sdch_dictionary_fetcher.h"
#include "base/bind.h"
#include "base/compiler_specific.h"
#include "base/message_loop.h"
#include "chrome/browser/profiles/profile.h"
#include "net/base/load_flags.h"
#include "net/url_request/url_fetcher.h"
#include "net/url_request/url_request_context_getter.h"
#include "net/url_request/url_request_status.h"
SdchDictionaryFetcher::SdchDictionaryFetcher(
net::URLRequestContextGetter* context)
: ALLOW_THIS_IN_INITIALIZER_LIST(weak_factory_(this)),
task_is_pending_(false),
context_(context) {
DCHECK(CalledOnValidThread());
}
SdchDictionaryFetcher::~SdchDictionaryFetcher() {
DCHECK(CalledOnValidThread());
}
// static
void SdchDictionaryFetcher::Shutdown() {
net::SdchManager::Shutdown();
}
void SdchDictionaryFetcher::Schedule(const GURL& dictionary_url) {
DCHECK(CalledOnValidThread());
// Avoid pushing duplicate copy onto queue. We may fetch this url again later
// and get a different dictionary, but there is no reason to have it in the
// queue twice at one time.
if (!fetch_queue_.empty() && fetch_queue_.back() == dictionary_url) {
net::SdchManager::SdchErrorRecovery(
net::SdchManager::DICTIONARY_ALREADY_SCHEDULED_TO_DOWNLOAD);
return;
}
if (attempted_load_.find(dictionary_url) != attempted_load_.end()) {
net::SdchManager::SdchErrorRecovery(
net::SdchManager::DICTIONARY_ALREADY_TRIED_TO_DOWNLOAD);
return;
}
attempted_load_.insert(dictionary_url);
fetch_queue_.push(dictionary_url);
ScheduleDelayedRun();
}
void SdchDictionaryFetcher::ScheduleDelayedRun() {
if (fetch_queue_.empty() || current_fetch_.get() || task_is_pending_)
return;
MessageLoop::current()->PostDelayedTask(FROM_HERE,
base::Bind(&SdchDictionaryFetcher::StartFetching,
weak_factory_.GetWeakPtr()),
base::TimeDelta::FromMilliseconds(kMsDelayFromRequestTillDownload));
task_is_pending_ = true;
}
void SdchDictionaryFetcher::StartFetching() {
DCHECK(task_is_pending_);
task_is_pending_ = false;
DCHECK(context_.get());
current_fetch_.reset(net::URLFetcher::Create(
fetch_queue_.front(), net::URLFetcher::GET, this));
fetch_queue_.pop();
current_fetch_->SetRequestContext(context_.get());
current_fetch_->SetLoadFlags(net::LOAD_DO_NOT_SEND_COOKIES |
net::LOAD_DO_NOT_SAVE_COOKIES);
current_fetch_->Start();
}
void SdchDictionaryFetcher::OnURLFetchComplete(
const net::URLFetcher* source) {
if ((200 == source->GetResponseCode()) &&
(source->GetStatus().status() == net::URLRequestStatus::SUCCESS)) {
std::string data;
source->GetResponseAsString(&data);
net::SdchManager::Global()->AddSdchDictionary(data, source->GetURL());
}
current_fetch_.reset(NULL);
ScheduleDelayedRun();
}
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