content/browser/webui/url_data_manager_backend.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CONTENT_BROWSER_WEBUI_URL_DATA_MANAGER_BACKEND_H_
   6 #define CONTENT_BROWSER_WEBUI_URL_DATA_MANAGER_BACKEND_H_
   7
   8 #include <map>
   9 #include <string>
  10 #include <vector>
  11
  12 #include "base/basictypes.h"
  13 #include "base/compiler_specific.h"
  14 #include "base/supports_user_data.h"
  15 #include "content/browser/webui/url_data_manager.h"
  16 #include "content/public/browser/url_data_source.h"
  17 #include "net/url_request/url_request_job_factory.h"
  18
  19 class GURL;
  20
  21 namespace base {
  22 class RefCountedMemory;
  23 }
  24
  25 namespace content {
  26
  27 class AppCacheServiceImpl;
  28 class ChromeBlobStorageContext;
  29 class ResourceContext;
  30 class URLDataManagerBackend;
  31 class URLDataSourceImpl;
  32 class URLRequestChromeJob;
  33
  34 // URLDataManagerBackend is used internally by ChromeURLDataManager on the IO
  35 // thread. In most cases you can use the API in ChromeURLDataManager and ignore
  36 // this class. URLDataManagerBackend is owned by ResourceContext.
  37 class URLDataManagerBackend : public base::SupportsUserData::Data {
  38  public:
  39   typedef int RequestID;
  40
  41   URLDataManagerBackend();
  42   virtual ~URLDataManagerBackend();
  43
  44   // Invoked to create the protocol handler for chrome://. |is_incognito| should
  45   // be set for incognito profiles. Called on the UI thread.
  46   static net::URLRequestJobFactory::ProtocolHandler* CreateProtocolHandler(
  47       content::ResourceContext* resource_context,
  48       bool is_incognito,
  49       AppCacheServiceImpl* appcache_service,
  50       ChromeBlobStorageContext* blob_storage_context);
  51
  52   // Adds a DataSource to the collection of data sources.
  53   void AddDataSource(URLDataSourceImpl* source);
  54
  55   // DataSource invokes this. Sends the data to the URLRequest.
  56   void DataAvailable(RequestID request_id, base::RefCountedMemory* bytes);
  57
  58   static net::URLRequestJob* Factory(net::URLRequest* request,
  59                                      const std::string& scheme);
  60
  61  private:
  62   friend class URLRequestChromeJob;
  63
  64   typedef std::map<std::string,
  65       scoped_refptr<URLDataSourceImpl> > DataSourceMap;
  66   typedef std::map<RequestID, URLRequestChromeJob*> PendingRequestMap;
  67
  68   // Called by the job when it's starting up.
  69   // Returns false if |url| is not a URL managed by this object.
  70   bool StartRequest(const net::URLRequest* request, URLRequestChromeJob* job);
  71
  72   // Helper function to call StartDataRequest on |source|'s delegate. This is
  73   // needed because while we want to call URLDataSourceDelegate's method, we
  74   // need to add a refcount on the source.
  75   static void CallStartRequest(scoped_refptr<URLDataSourceImpl> source,
  76                                const std::string& path,
  77                                int render_process_id,
  78                                int render_frame_id,
  79                                int request_id);
  80
  81   // Remove a request from the list of pending requests.
  82   void RemoveRequest(URLRequestChromeJob* job);
  83
  84   // Returns true if the job exists in |pending_requests_|. False otherwise.
  85   // Called by ~URLRequestChromeJob to verify that |pending_requests_| is kept
  86   // up to date.
  87   bool HasPendingJob(URLRequestChromeJob* job) const;
  88
  89   // Look up the data source for the request. Returns the source if it is found,
  90   // else NULL.
  91   URLDataSourceImpl* GetDataSourceFromURL(const GURL& url);
  92
  93   // Custom sources of data, keyed by source path (e.g. "favicon").
  94   DataSourceMap data_sources_;
  95
  96   // All pending URLRequestChromeJobs, keyed by ID of the request.
  97   // URLRequestChromeJob calls into this object when it's constructed and
  98   // destructed to ensure that the pointers in this map remain valid.
  99   PendingRequestMap pending_requests_;
 100
 101   // The ID we'll use for the next request we receive.
 102   RequestID next_request_id_;
 103
 104   DISALLOW_COPY_AND_ASSIGN(URLDataManagerBackend);
 105 };
 106
 107 // Creates protocol handler for chrome-devtools://. |is_incognito| should be
 108 // set for incognito profiles.
 109 net::URLRequestJobFactory::ProtocolHandler*
 110 CreateDevToolsProtocolHandler(content::ResourceContext* resource_context,
 111                               bool is_incognito);
 112
 113 }  // namespace content
 114
 115 #endif  // CONTENT_BROWSER_WEBUI_URL_DATA_MANAGER_BACKEND_H_