Move of SdchDictionaryFetcher to net.

chrome/browser/net/sdch_dictionary_fetcher.cc

-// 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/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::SdchManager* manager,
-    net::URLRequestContextGetter* context)
-    : manager_(manager),
-      weak_factory_(this),
-      task_is_pending_(false),
-      context_(context) {
-  DCHECK(CalledOnValidThread());
-  DCHECK(manager);
-}
-
-SdchDictionaryFetcher::~SdchDictionaryFetcher() {
-  DCHECK(CalledOnValidThread());
-}
-
-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::Cancel() {
-  DCHECK(CalledOnValidThread());
-
-  while (!fetch_queue_.empty())
-    fetch_queue_.pop();
-  attempted_load_.clear();
-  weak_factory_.InvalidateWeakPtrs();
-  current_fetch_.reset(NULL);
-}
-
-void SdchDictionaryFetcher::ScheduleDelayedRun() {
-  if (fetch_queue_.empty() || current_fetch_.get() || task_is_pending_)
-    return;
-  base::MessageLoop::current()->PostDelayedTask(FROM_HERE,
-      base::Bind(&SdchDictionaryFetcher::StartFetching,
-                 weak_factory_.GetWeakPtr()),
-      base::TimeDelta::FromMilliseconds(kMsDelayFromRequestTillDownload));
-  task_is_pending_ = true;
-}
-
-void SdchDictionaryFetcher::StartFetching() {
-  DCHECK(CalledOnValidThread());
-  DCHECK(task_is_pending_);
-  task_is_pending_ = false;
-
-  // Handle losing the race against Cancel().
-  if (fetch_queue_.empty())
-    return;
-
-  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) {
-  DCHECK(CalledOnValidThread());
-  if ((200 == source->GetResponseCode()) &&
-      (source->GetStatus().status() == net::URLRequestStatus::SUCCESS)) {
-    std::string data;
-    source->GetResponseAsString(&data);
-    manager_->AddSdchDictionary(data, source->GetURL());
-  }
-  current_fetch_.reset(NULL);
-  ScheduleDelayedRun();
-}