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chrome/browser/supervised_user/experimental/supervised_user_blacklist_downloader.cc

-// Copyright 2014 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/supervised_user/experimental/supervised_user_blacklist_downloader.h"
-
-#include "base/files/file_path.h"
-#include "base/files/file_util.h"
-#include "base/logging.h"
-#include "content/public/browser/browser_thread.h"
-#include "net/base/load_flags.h"
-#include "net/http/http_status_code.h"
-#include "net/url_request/url_fetcher.h"
-#include "url/gurl.h"
-
-using content::BrowserThread;
-using net::URLFetcher;
-
-const int kNumRetries = 1;
-
-SupervisedUserBlacklistDownloader::SupervisedUserBlacklistDownloader(
-    const GURL& url,
-    const base::FilePath& path,
-    net::URLRequestContextGetter* request_context,
-    const DownloadFinishedCallback& callback)
-    : callback_(callback),
-      fetcher_(URLFetcher::Create(url, URLFetcher::GET, this)),
-      weak_ptr_factory_(this) {
-  fetcher_->SetRequestContext(request_context);
-  fetcher_->SetLoadFlags(net::LOAD_DO_NOT_SEND_COOKIES |
-                         net::LOAD_DO_NOT_SAVE_COOKIES);
-  fetcher_->SetAutomaticallyRetryOnNetworkChanges(kNumRetries);
-  fetcher_->SaveResponseToFileAtPath(
-      path,
-      BrowserThread::GetMessageLoopProxyForThread(BrowserThread::FILE));
-
-  base::PostTaskAndReplyWithResult(
-      BrowserThread::GetBlockingPool()->GetTaskRunnerWithShutdownBehavior(
-          base::SequencedWorkerPool::CONTINUE_ON_SHUTDOWN).get(),
-      FROM_HERE,
-      base::Bind(&base::PathExists, path),
-      base::Bind(&SupervisedUserBlacklistDownloader::OnFileExistsCheckDone,
-                 weak_ptr_factory_.GetWeakPtr()));
-}
-
-SupervisedUserBlacklistDownloader::~SupervisedUserBlacklistDownloader() {}
-
-void SupervisedUserBlacklistDownloader::OnURLFetchComplete(
-    const net::URLFetcher* source) {
-  DCHECK_EQ(fetcher_.get(), source);
-
-  const net::URLRequestStatus& status = source->GetStatus();
-  if (!status.is_success()) {
-    DLOG(WARNING) << "URLRequestStatus error " << status.error();
-    callback_.Run(false);
-    return;
-  }
-
-  int response_code = source->GetResponseCode();
-  if (response_code != net::HTTP_OK) {
-    DLOG(WARNING) << "HTTP error " << response_code;
-    callback_.Run(false);
-    return;
-  }
-
-  // Take ownership of the new file.
-  base::FilePath response_path;
-  bool success = source->GetResponseAsFilePath(true, &response_path);
-  callback_.Run(success);
-}
-
-void SupervisedUserBlacklistDownloader::OnFileExistsCheckDone(bool exists) {
-  if (exists) {
-    // TODO(treib): Figure out a strategy for updating the file.
-    callback_.Run(true);
-  } else {
-    fetcher_->Start();
-  }
-}