text: // 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/resource_context_impl.h"
  
  #include "base/logging.h"
  #include "content/browser/fileapi/chrome_blob_storage_context.h"
  #include "content/browser/loader/resource_dispatcher_host_impl.h"
  #include "content/browser/loader/resource_request_info_impl.h"
  #include "content/browser/streams/stream_context.h"
  #include "content/browser/webui/url_data_manager_backend.h"
  #include "content/public/browser/browser_context.h"
  #include "content/public/browser/browser_thread.h"
  #include "net/base/keygen_handler.h"
  #include "net/ssl/client_cert_store.h"
  
  using base::UserDataAdapter;
  
  namespace content {
  
  namespace {
  
  // Key names on ResourceContext.
  const char kBlobStorageContextKeyName[] = "content_blob_storage_context";
  const char kStreamContextKeyName[] = "content_stream_context";
  const char kURLDataManagerBackendKeyName[] = "url_data_manager_backend";
  
  // Used by the default implementation of GetMediaDeviceIDSalt, below.
  std::string ReturnEmptySalt() {
    return std::string();
  }
  
  }  // namespace
  
  
  ResourceContext::ResourceContext() {
    if (ResourceDispatcherHostImpl::Get())
      ResourceDispatcherHostImpl::Get()->AddResourceContext(this);
  }
  
  ResourceContext::~ResourceContext() {
    ResourceDispatcherHostImpl* rdhi = ResourceDispatcherHostImpl::Get();
    if (rdhi) {
      rdhi->CancelRequestsForContext(this);
      rdhi->RemoveResourceContext(this);
    }
  
    // In some tests this object is destructed on UI thread.
    DetachUserDataThread();
  }
  
  ResourceContext::SaltCallback ResourceContext::GetMediaDeviceIDSalt() {
    return base::Bind(&ReturnEmptySalt);
  }
  
  scoped_ptr<net::ClientCertStore> ResourceContext::CreateClientCertStore() {
    return scoped_ptr<net::ClientCertStore>();
  }
  
  void ResourceContext::CreateKeygenHandler(
      uint32 key_size_in_bits,
      const std::string& challenge_string,
      const GURL& url,
      const base::Callback<void(scoped_ptr<net::KeygenHandler>)>& callback) {
    callback.Run(make_scoped_ptr(
        new net::KeygenHandler(key_size_in_bits, challenge_string, url)));
  }
  
  ChromeBlobStorageContext* GetChromeBlobStorageContextForResourceContext(
      const ResourceContext* resource_context) {
    DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
    return UserDataAdapter<ChromeBlobStorageContext>::Get(
        resource_context, kBlobStorageContextKeyName);
  }
  
  StreamContext* GetStreamContextForResourceContext(
      const ResourceContext* resource_context) {
    DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
    return UserDataAdapter<StreamContext>::Get(
        resource_context, kStreamContextKeyName);
  }
  
  URLDataManagerBackend* GetURLDataManagerForResourceContext(
      ResourceContext* context) {
    DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
    if (!context->GetUserData(kURLDataManagerBackendKeyName)) {
      context->SetUserData(kURLDataManagerBackendKeyName,
                           new URLDataManagerBackend());
    }
    return static_cast<URLDataManagerBackend*>(
        context->GetUserData(kURLDataManagerBackendKeyName));
  }
  
  void InitializeResourceContext(BrowserContext* browser_context) {
    ResourceContext* resource_context = browser_context->GetResourceContext();
  
    resource_context->SetUserData(
        kBlobStorageContextKeyName,
        new UserDataAdapter<ChromeBlobStorageContext>(
            ChromeBlobStorageContext::GetFor(browser_context)));
  
    resource_context->SetUserData(
        kStreamContextKeyName,
        new UserDataAdapter<StreamContext>(
            StreamContext::GetFor(browser_context)));
  
    resource_context->DetachUserDataThread();
  }
  
  }  // namespace content
  