Add content/browser/loader/ for resource loading related classes.

content/browser/renderer_host/resource_loader.cc

Index: content/browser/renderer_host/resource_loader.cc
===================================================================
--- content/browser/renderer_host/resource_loader.cc	(revision 171168)
+++ content/browser/renderer_host/resource_loader.cc	(working copy)
@@ -1,582 +0,0 @@
-// 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 "content/browser/renderer_host/resource_loader.h"
-
-#include "base/message_loop.h"
-#include "base/time.h"
-#include "content/browser/child_process_security_policy_impl.h"
-#include "content/browser/renderer_host/doomed_resource_handler.h"
-#include "content/browser/renderer_host/resource_loader_delegate.h"
-#include "content/browser/renderer_host/resource_request_info_impl.h"
-#include "content/browser/ssl/ssl_client_auth_handler.h"
-#include "content/browser/ssl/ssl_manager.h"
-#include "content/common/ssl_status_serialization.h"
-#include "content/public/browser/cert_store.h"
-#include "content/public/browser/resource_dispatcher_host_login_delegate.h"
-#include "content/public/common/resource_response.h"
-#include "net/base/load_flags.h"
-#include "net/http/http_response_headers.h"
-#include "webkit/appcache/appcache_interceptor.h"
-
-using base::TimeDelta;
-using base::TimeTicks;
-
-namespace content {
-namespace {
-
-void PopulateResourceResponse(net::URLRequest* request,
-                              ResourceResponse* response) {
-  response->head.error_code = request->status().error();
-  response->head.request_time = request->request_time();
-  response->head.response_time = request->response_time();
-  response->head.headers = request->response_headers();
-  request->GetCharset(&response->head.charset);
-  response->head.content_length = request->GetExpectedContentSize();
-  request->GetMimeType(&response->head.mime_type);
-  net::HttpResponseInfo response_info = request->response_info();
-  response->head.was_fetched_via_spdy = response_info.was_fetched_via_spdy;
-  response->head.was_npn_negotiated = response_info.was_npn_negotiated;
-  response->head.npn_negotiated_protocol =
-      response_info.npn_negotiated_protocol;
-  response->head.was_fetched_via_proxy = request->was_fetched_via_proxy();
-  response->head.socket_address = request->GetSocketAddress();
-  appcache::AppCacheInterceptor::GetExtraResponseInfo(
-      request,
-      &response->head.appcache_id,
-      &response->head.appcache_manifest_url);
-}
-
-}  // namespace
-
-ResourceLoader::ResourceLoader(scoped_ptr<net::URLRequest> request,
-                               scoped_ptr<ResourceHandler> handler,
-                               ResourceLoaderDelegate* delegate)
-    : deferred_stage_(DEFERRED_NONE),
-      request_(request.Pass()),
-      handler_(handler.Pass()),
-      delegate_(delegate),
-      last_upload_position_(0),
-      waiting_for_upload_progress_ack_(false),
-      is_transferring_(false),
-      weak_ptr_factory_(this) {
-  request_->set_delegate(this);
-  handler_->SetController(this);
-}
-
-ResourceLoader::~ResourceLoader() {
-  if (login_delegate_)
-    login_delegate_->OnRequestCancelled();
-  if (ssl_client_auth_handler_)
-    ssl_client_auth_handler_->OnRequestCancelled();
-
-  // Run ResourceHandler destructor before we tear-down the rest of our state
-  // as the ResourceHandler may want to inspect the URLRequest and other state.
-  handler_.reset();
-}
-
-void ResourceLoader::StartRequest() {
-  if (delegate_->HandleExternalProtocol(this, request_->url())) {
-    CancelAndIgnore();
-    return;
-  }
-
-  // Give the handler a chance to delay the URLRequest from being started.
-  bool defer_start = false;
-  if (!handler_->OnWillStart(GetRequestInfo()->GetRequestID(), request_->url(),
-                             &defer_start)) {
-    Cancel();
-    return;
-  }
-
-  if (defer_start) {
-    deferred_stage_ = DEFERRED_START;
-  } else {
-    StartRequestInternal();
-  }
-}
-
-void ResourceLoader::CancelRequest(bool from_renderer) {
-  CancelRequestInternal(net::ERR_ABORTED, from_renderer);
-}
-
-void ResourceLoader::CancelAndIgnore() {
-  ResourceRequestInfoImpl* info = GetRequestInfo();
-  info->set_was_ignored_by_handler(true);
-  CancelRequest(false);
-}
-
-void ResourceLoader::CancelWithError(int error_code) {
-  CancelRequestInternal(error_code, false);
-}
-
-void ResourceLoader::ReportUploadProgress() {
-  ResourceRequestInfoImpl* info = GetRequestInfo();
-
-  if (waiting_for_upload_progress_ack_)
-    return;  // Send one progress event at a time.
-
-  net::UploadProgress progress = request_->GetUploadProgress();
-  if (!progress.size())
-    return;  // Nothing to upload.
-
-  if (progress.position() == last_upload_position_)
-    return;  // No progress made since last time.
-
-  const uint64 kHalfPercentIncrements = 200;
-  const TimeDelta kOneSecond = TimeDelta::FromMilliseconds(1000);
-
-  uint64 amt_since_last = progress.position() - last_upload_position_;
-  TimeDelta time_since_last = TimeTicks::Now() - last_upload_ticks_;
-
-  bool is_finished = (progress.size() == progress.position());
-  bool enough_new_progress =
-      (amt_since_last > (progress.size() / kHalfPercentIncrements));
-  bool too_much_time_passed = time_since_last > kOneSecond;
-
-  if (is_finished || enough_new_progress || too_much_time_passed) {
-    if (request_->load_flags() & net::LOAD_ENABLE_UPLOAD_PROGRESS) {
-      handler_->OnUploadProgress(
-          info->GetRequestID(), progress.position(), progress.size());
-      waiting_for_upload_progress_ack_ = true;
-    }
-    last_upload_ticks_ = TimeTicks::Now();
-    last_upload_position_ = progress.position();
-  }
-}
-
-void ResourceLoader::MarkAsTransferring() {
-  is_transferring_ = true;
-
-  // When an URLRequest is transferred to a new RenderViewHost, its
-  // ResourceHandler should not receive any notifications because it may depend
-  // on the state of the old RVH. We set a ResourceHandler that only allows
-  // canceling requests, because on shutdown of the RDH all pending requests
-  // are canceled. The RVH of requests that are being transferred may be gone
-  // by that time. In CompleteTransfer, the ResoureHandlers are substituted
-  // again.
-  handler_.reset(new DoomedResourceHandler(handler_.Pass()));
-}
-
-void ResourceLoader::WillCompleteTransfer() {
-  handler_.reset();
-}
-
-void ResourceLoader::CompleteTransfer(scoped_ptr<ResourceHandler> new_handler) {
-  DCHECK_EQ(DEFERRED_REDIRECT, deferred_stage_);
-  DCHECK(!handler_.get());
-
-  handler_ = new_handler.Pass();
-  handler_->SetController(this);
-  is_transferring_ = false;
-
-  Resume();
-}
-
-ResourceRequestInfoImpl* ResourceLoader::GetRequestInfo() {
-  return ResourceRequestInfoImpl::ForRequest(request_.get());
-}
-
-void ResourceLoader::ClearLoginDelegate() {
-  login_delegate_ = NULL;
-}
-
-void ResourceLoader::ClearSSLClientAuthHandler() {
-  ssl_client_auth_handler_ = NULL;
-}
-
-void ResourceLoader::OnUploadProgressACK() {
-  waiting_for_upload_progress_ack_ = false;
-}
-
-void ResourceLoader::OnReceivedRedirect(net::URLRequest* unused,
-                                        const GURL& new_url,
-                                        bool* defer) {
-  DCHECK_EQ(request_.get(), unused);
-
-  VLOG(1) << "OnReceivedRedirect: " << request_->url().spec();
-  DCHECK(request_->status().is_success());
-
-  ResourceRequestInfoImpl* info = GetRequestInfo();
-
-  if (info->process_type() != PROCESS_TYPE_PLUGIN &&
-      !ChildProcessSecurityPolicyImpl::GetInstance()->
-          CanRequestURL(info->GetChildID(), new_url)) {
-    VLOG(1) << "Denied unauthorized request for "
-            << new_url.possibly_invalid_spec();
-
-    // Tell the renderer that this request was disallowed.
-    Cancel();
-    return;
-  }
-
-  delegate_->DidReceiveRedirect(this, new_url);
-
-  if (delegate_->HandleExternalProtocol(this, new_url)) {
-    // The request is complete so we can remove it.
-    CancelAndIgnore();
-    return;
-  }
-
-  scoped_refptr<ResourceResponse> response(new ResourceResponse());
-  PopulateResourceResponse(request_.get(), response);
-
-  if (!handler_->OnRequestRedirected(info->GetRequestID(), new_url, response,
-                                     defer)) {
-    Cancel();
-  } else if (*defer) {
-    deferred_stage_ = DEFERRED_REDIRECT;  // Follow redirect when resumed.
-  }
-}
-
-void ResourceLoader::OnAuthRequired(net::URLRequest* unused,
-                                    net::AuthChallengeInfo* auth_info) {
-  DCHECK_EQ(request_.get(), unused);
-
-  if (request_->load_flags() & net::LOAD_DO_NOT_PROMPT_FOR_LOGIN) {
-    request_->CancelAuth();
-    return;
-  }
-
-  if (!delegate_->AcceptAuthRequest(this, auth_info)) {
-    request_->CancelAuth();
-    return;
-  }
-
-  // Create a login dialog on the UI thread to get authentication data, or pull
-  // from cache and continue on the IO thread.
-
-  DCHECK(!login_delegate_) <<
-      "OnAuthRequired called with login_delegate pending";
-  login_delegate_ = delegate_->CreateLoginDelegate(this, auth_info);
-  if (!login_delegate_)
-    request_->CancelAuth();
-}
-
-void ResourceLoader::OnCertificateRequested(
-    net::URLRequest* unused,
-    net::SSLCertRequestInfo* cert_info) {
-  DCHECK_EQ(request_.get(), unused);
-
-  if (!delegate_->AcceptSSLClientCertificateRequest(this, cert_info)) {
-    request_->Cancel();
-    return;
-  }
-
-  if (cert_info->client_certs.empty()) {
-    // No need to query the user if there are no certs to choose from.
-    request_->ContinueWithCertificate(NULL);
-    return;
-  }
-
-  DCHECK(!ssl_client_auth_handler_) <<
-      "OnCertificateRequested called with ssl_client_auth_handler pending";
-  ssl_client_auth_handler_ = new SSLClientAuthHandler(request_.get(),
-                                                      cert_info);
-  ssl_client_auth_handler_->SelectCertificate();
-}
-
-void ResourceLoader::OnSSLCertificateError(net::URLRequest* request,
-                                           const net::SSLInfo& ssl_info,
-                                           bool fatal) {
-  ResourceRequestInfoImpl* info = GetRequestInfo();
-
-  int render_process_id;
-  int render_view_id;
-  if (!info->GetAssociatedRenderView(&render_process_id, &render_view_id))
-    NOTREACHED();
-
-  SSLManager::OnSSLCertificateError(
-      weak_ptr_factory_.GetWeakPtr(),
-      info->GetGlobalRequestID(),
-      info->GetResourceType(),
-      request_->url(),
-      render_process_id,
-      render_view_id,
-      ssl_info,
-      fatal);
-}
-
-void ResourceLoader::OnResponseStarted(net::URLRequest* unused) {
-  DCHECK_EQ(request_.get(), unused);
-
-  VLOG(1) << "OnResponseStarted: " << request_->url().spec();
-
-  if (!request_->status().is_success()) {
-    ResponseCompleted();
-    return;
-  }
-
-  // We want to send a final upload progress message prior to sending the
-  // response complete message even if we're waiting for an ack to to a
-  // previous upload progress message.
-  waiting_for_upload_progress_ack_ = false;
-  ReportUploadProgress();
-
-  CompleteResponseStarted();
-
-  if (is_deferred())
-    return;
-
-  if (request_->status().is_success()) {
-    StartReading(false);  // Read the first chunk.
-  } else {
-    ResponseCompleted();
-  }
-}
-
-void ResourceLoader::OnReadCompleted(net::URLRequest* unused, int bytes_read) {
-  DCHECK_EQ(request_.get(), unused);
-  VLOG(1) << "OnReadCompleted: \"" << request_->url().spec() << "\""
-          << " bytes_read = " << bytes_read;
-
-  // bytes_read == -1 always implies an error.
-  if (bytes_read == -1 || !request_->status().is_success()) {
-    ResponseCompleted();
-    return;
-  }
-
-  CompleteRead(bytes_read);
-
-  if (is_deferred())
-    return;
-
-  if (request_->status().is_success() && bytes_read > 0) {
-    StartReading(true);  // Read the next chunk.
-  } else {
-    ResponseCompleted();
-  }
-}
-
-void ResourceLoader::CancelSSLRequest(const GlobalRequestID& id,
-                                      int error,
-                                      const net::SSLInfo* ssl_info) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
-
-  // The request can be NULL if it was cancelled by the renderer (as the
-  // request of the user navigating to a new page from the location bar).
-  if (!request_->is_pending())
-    return;
-  DVLOG(1) << "CancelSSLRequest() url: " << request_->url().spec();
-
-  if (ssl_info) {
-    request_->CancelWithSSLError(error, *ssl_info);
-  } else {
-    request_->CancelWithError(error);
-  }
-}
-
-void ResourceLoader::ContinueSSLRequest(const GlobalRequestID& id) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
-
-  DVLOG(1) << "ContinueSSLRequest() url: " << request_->url().spec();
-
-  request_->ContinueDespiteLastError();
-}
-
-void ResourceLoader::Resume() {
-  DCHECK(!is_transferring_);
-
-  DeferredStage stage = deferred_stage_;
-  deferred_stage_ = DEFERRED_NONE;
-  switch (stage) {
-    case DEFERRED_NONE:
-      NOTREACHED();
-      break;
-    case DEFERRED_START:
-      StartRequestInternal();
-      break;
-    case DEFERRED_REDIRECT:
-      request_->FollowDeferredRedirect();
-      break;
-    case DEFERRED_READ:
-      MessageLoop::current()->PostTask(
-          FROM_HERE,
-          base::Bind(&ResourceLoader::ResumeReading,
-                     weak_ptr_factory_.GetWeakPtr()));
-      break;
-    case DEFERRED_FINISH:
-      // Delay self-destruction since we don't know how we were reached.
-      MessageLoop::current()->PostTask(
-          FROM_HERE,
-          base::Bind(&ResourceLoader::CallDidFinishLoading,
-                     weak_ptr_factory_.GetWeakPtr()));
-      break;
-  }
-}
-
-void ResourceLoader::Cancel() {
-  CancelRequest(false);
-}
-
-void ResourceLoader::StartRequestInternal() {
-  DCHECK(!request_->is_pending());
-  request_->Start();
-
-  delegate_->DidStartRequest(this);
-}
-
-void ResourceLoader::CancelRequestInternal(int error, bool from_renderer) {
-  VLOG(1) << "CancelRequestInternal: " << request_->url().spec();
-
-  ResourceRequestInfoImpl* info = GetRequestInfo();
-
-  // WebKit will send us a cancel for downloads since it no longer handles
-  // them.  In this case, ignore the cancel since we handle downloads in the
-  // browser.
-  if (from_renderer && info->is_download())
-    return;
-
-  // TODO(darin): Perhaps we should really be looking to see if the status is
-  // IO_PENDING?
-  bool was_pending = request_->is_pending();
-
-  if (login_delegate_) {
-    login_delegate_->OnRequestCancelled();
-    login_delegate_ = NULL;
-  }
-  if (ssl_client_auth_handler_) {
-    ssl_client_auth_handler_->OnRequestCancelled();
-    ssl_client_auth_handler_ = NULL;
-  }
-
-  request_->CancelWithError(error);
-
-  if (!was_pending) {
-    // If the request isn't in flight, then we won't get an asynchronous
-    // notification from the request, so we have to signal ourselves to finish
-    // this request.
-    MessageLoop::current()->PostTask(
-        FROM_HERE, base::Bind(&ResourceLoader::ResponseCompleted,
-                              weak_ptr_factory_.GetWeakPtr()));
-  }
-}
-
-void ResourceLoader::CompleteResponseStarted() {
-  ResourceRequestInfoImpl* info = GetRequestInfo();
-
-  scoped_refptr<ResourceResponse> response(new ResourceResponse());
-  PopulateResourceResponse(request_.get(), response);
-
-  if (request_->ssl_info().cert) {
-    int cert_id =
-        CertStore::GetInstance()->StoreCert(request_->ssl_info().cert,
-                                            info->GetChildID());
-    response->head.security_info = SerializeSecurityInfo(
-        cert_id,
-        request_->ssl_info().cert_status,
-        request_->ssl_info().security_bits,
-        request_->ssl_info().connection_status);
-  } else {
-    // We should not have any SSL state.
-    DCHECK(!request_->ssl_info().cert_status &&
-           request_->ssl_info().security_bits == -1 &&
-           !request_->ssl_info().connection_status);
-  }
-
-  delegate_->DidReceiveResponse(this);
-
-  bool defer = false;
-  if (!handler_->OnResponseStarted(info->GetRequestID(), response, &defer)) {
-    Cancel();
-  } else if (defer) {
-    deferred_stage_ = DEFERRED_READ;  // Read first chunk when resumed.
-  }
-}
-
-void ResourceLoader::StartReading(bool is_continuation) {
-  int bytes_read = 0;
-  ReadMore(&bytes_read);
-
-  // If IO is pending, wait for the URLRequest to call OnReadCompleted.
-  if (request_->status().is_io_pending())
-    return;
-
-  if (!is_continuation || bytes_read <= 0) {
-    OnReadCompleted(request_.get(), bytes_read);
-  } else {
-    // Else, trigger OnReadCompleted asynchronously to avoid starving the IO
-    // thread in case the URLRequest can provide data synchronously.
-    MessageLoop::current()->PostTask(
-        FROM_HERE,
-        base::Bind(&ResourceLoader::OnReadCompleted,
-                   weak_ptr_factory_.GetWeakPtr(),
-                   request_.get(), bytes_read));
-  }
-}
-
-void ResourceLoader::ResumeReading() {
-  DCHECK(!is_deferred());
-
-  if (request_->status().is_success()) {
-    StartReading(false);  // Read the next chunk (OK to complete synchronously).
-  } else {
-    ResponseCompleted();
-  }
-}
-
-void ResourceLoader::ReadMore(int* bytes_read) {
-  ResourceRequestInfoImpl* info = GetRequestInfo();
-  DCHECK(!is_deferred());
-
-  net::IOBuffer* buf;
-  int buf_size;
-  if (!handler_->OnWillRead(info->GetRequestID(), &buf, &buf_size, -1)) {
-    Cancel();
-    return;
-  }
-
-  DCHECK(buf);
-  DCHECK(buf_size > 0);
-
-  request_->Read(buf, buf_size, bytes_read);
-
-  // No need to check the return value here as we'll detect errors by
-  // inspecting the URLRequest's status.
-}
-
-void ResourceLoader::CompleteRead(int bytes_read) {
-  DCHECK(bytes_read >= 0);
-  DCHECK(request_->status().is_success());
-
-  ResourceRequestInfoImpl* info = GetRequestInfo();
-
-  bool defer = false;
-  if (!handler_->OnReadCompleted(info->GetRequestID(), bytes_read, &defer)) {
-    Cancel();
-  } else if (defer) {
-    deferred_stage_ = DEFERRED_READ;  // Read next chunk when resumed.
-  }
-}
-
-void ResourceLoader::ResponseCompleted() {
-  VLOG(1) << "ResponseCompleted: " << request_->url().spec();
-  ResourceRequestInfoImpl* info = GetRequestInfo();
-
-  std::string security_info;
-  const net::SSLInfo& ssl_info = request_->ssl_info();
-  if (ssl_info.cert != NULL) {
-    int cert_id = CertStore::GetInstance()->StoreCert(ssl_info.cert,
-                                                      info->GetChildID());
-    security_info = SerializeSecurityInfo(
-        cert_id, ssl_info.cert_status, ssl_info.security_bits,
-        ssl_info.connection_status);
-  }
-
-  if (handler_->OnResponseCompleted(info->GetRequestID(), request_->status(),
-                                    security_info)) {
-    // This will result in our destruction.
-    CallDidFinishLoading();
-  } else {
-    // The handler is not ready to die yet.  We will call DidFinishLoading when
-    // we resume.
-    deferred_stage_ = DEFERRED_FINISH;
-  }
-}
-
-void ResourceLoader::CallDidFinishLoading() {
-  delegate_->DidFinishLoading(this);
-}
-
-}  // namespace content