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      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_
     78