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/wifi_data_provider.h"
  12 #include "content/common/content_export.h"
  13 #include "net/url_request/url_fetcher_delegate.h"
  14 #include "url/gurl.h"
  15
  16 namespace net {
  17 class URLFetcher;
  18 class URLRequestContextGetter;
  19 }
  20
  21 namespace content {
  22 struct Geoposition;
  23
  24 // Takes wifi 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
  31   // Called when a new geo position is available. The second argument indicates
  32   // whether there was a server error or not. It is true when there was a
  33   // server or network error - either no response or a 500 error code.
  34   typedef base::Callback<void(const Geoposition& /* position */,
  35                               bool /* server_error */,
  36                               const base::string16& /* access_token */,
  37                               const WifiData& /* wifi_data */)>
  38       LocationResponseCallback;
  39
  40   // |url| is the server address to which the request wil be sent.
  41   NetworkLocationRequest(net::URLRequestContextGetter* context,
  42                          const GURL& url,
  43                          LocationResponseCallback callback);
  44   virtual ~NetworkLocationRequest();
  45
  46   // Makes a new request. Returns true if the new request was successfully
  47   // started. In all cases, any currently pending request will be canceled.
  48   bool MakeRequest(const base::string16& access_token,
  49                    const WifiData& wifi_data,
  50                    const base::Time& timestamp);
  51
  52   bool is_request_pending() const { return url_fetcher_ != NULL; }
  53   const GURL& url() const { return url_; }
  54
  55  private:
  56   // net::URLFetcherDelegate
  57   virtual void OnURLFetchComplete(const net::URLFetcher* source) OVERRIDE;
  58
  59   scoped_refptr<net::URLRequestContextGetter> url_context_;
  60   LocationResponseCallback callback_;
  61   const GURL url_;
  62   scoped_ptr<net::URLFetcher> url_fetcher_;
  63
  64   // Keep a copy of the data sent in the request, so we can refer back to it
  65   // when the response arrives.
  66   WifiData wifi_data_;
  67   base::Time timestamp_;  // Timestamp of the above data, not of the request.
  68
  69   // The start time for the request.
  70   base::TimeTicks start_time_;
  71
  72   DISALLOW_COPY_AND_ASSIGN(NetworkLocationRequest);
  73 };
  74
  75 }  // namespace content
  76
  77 #endif  // CONTENT_BROWSER_GEOLOCATION_NETWORK_LOCATION_REQUEST_H_