content/browser/geolocation/network_location_request.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_GEOLOCATION_NETWORK_LOCATION_REQUEST_H_
   6 #define CONTENT_BROWSER_GEOLOCATION_NETWORK_LOCATION_REQUEST_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/memory/ref_counted.h"
  10 #include "base/memory/scoped_ptr.h"
  11 #include "content/browser/geolocation/device_data_provider.h"
  12 #include "content/common/content_export.h"
  13 #include "googleurl/src/gurl.h"
  14 #include "net/url_request/url_fetcher_delegate.h"
  15
  16 namespace net {
  17 class URLFetcher;
  18 class URLRequestContextGetter;
  19 }
  20
  21 namespace content {
  22 struct Geoposition;
  23
  24 // Takes a set of device data and sends it to a server to get a position fix.
  25 // It performs formatting of the request and interpretation of the response.
  26 class NetworkLocationRequest : private net::URLFetcherDelegate {
  27  public:
  28   // ID passed to URLFetcher::Create(). Used for testing.
  29   CONTENT_EXPORT static int url_fetcher_id_for_tests;
  30   // Interface for receiving callbacks from a NetworkLocationRequest object.
  31   class ListenerInterface {
  32    public:
  33     // Updates the listener with a new position. server_error indicates whether
  34     // was a server or network error - either no response or a 500 error code.
  35     virtual void LocationResponseAvailable(
  36         const Geoposition& position,
  37         bool server_error,
  38         const string16& access_token,
  39         const WifiData& wifi_data) = 0;
  40
  41    protected:
  42     virtual ~ListenerInterface() {}
  43   };
  44
  45   // |url| is the server address to which the request wil be sent.
  46   NetworkLocationRequest(net::URLRequestContextGetter* context,
  47                          const GURL& url,
  48                          ListenerInterface* listener);
  49   virtual ~NetworkLocationRequest();
  50
  51   // Makes a new request. Returns true if the new request was successfully
  52   // started. In all cases, any currently pending request will be canceled.
  53   bool MakeRequest(const string16& access_token,
  54                    const WifiData& wifi_data,
  55                    const base::Time& timestamp);
  56
  57   bool is_request_pending() const { return url_fetcher_ != NULL; }
  58   const GURL& url() const { return url_; }
  59
  60  private:
  61   // net::URLFetcherDelegate
  62   virtual void OnURLFetchComplete(const net::URLFetcher* source) OVERRIDE;
  63
  64   scoped_refptr<net::URLRequestContextGetter> url_context_;
  65   ListenerInterface* listener_;
  66   const GURL url_;
  67   scoped_ptr<net::URLFetcher> url_fetcher_;
  68
  69   // Keep a copy of the data sent in the request, so we can refer back to it
  70   // when the response arrives.
  71   WifiData wifi_data_;
  72   base::Time timestamp_;  // Timestamp of the above data, not of the request.
  73
  74   // The start time for the request.
  75   base::TimeTicks start_time_;
  76
  77   DISALLOW_COPY_AND_ASSIGN(NetworkLocationRequest);
  78 };
  79
  80 }  // namespace content
  81
  82 #endif  // CONTENT_BROWSER_GEOLOCATION_NETWORK_LOCATION_REQUEST_H_