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// 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.
#ifndef DEVICE_GEOLOCATION_NETWORK_LOCATION_REQUEST_H_
#define DEVICE_GEOLOCATION_NETWORK_LOCATION_REQUEST_H_
#include <memory>
#include "base/callback.h"
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/strings/string16.h"
#include "device/geolocation/geolocation_export.h"
#include "device/geolocation/wifi_data_provider.h"
#include "net/url_request/url_fetcher_delegate.h"
#include "url/gurl.h"
namespace net {
class URLFetcher;
class URLRequestContextGetter;
}
namespace device {
struct Geoposition;
// Takes wifi data and sends it to a server to get a position fix.
// It performs formatting of the request and interpretation of the response.
class NetworkLocationRequest : private net::URLFetcherDelegate {
public:
// ID passed to URLFetcher::Create(). Used for testing.
DEVICE_GEOLOCATION_EXPORT static int url_fetcher_id_for_tests;
// Called when a new geo position is available. The second argument indicates
// whether there was a server error or not. It is true when there was a
// server or network error - either no response or a 500 error code.
typedef base::Callback<void(const Geoposition& /* position */,
bool /* server_error */,
const WifiData& /* wifi_data */)>
LocationResponseCallback;
NetworkLocationRequest(scoped_refptr<net::URLRequestContextGetter> context,
const std::string& api_key,
LocationResponseCallback callback);
~NetworkLocationRequest() override;
// Makes a new request. Returns true if the new request was successfully
// started. In all cases, any currently pending request will be canceled.
bool MakeRequest(const WifiData& wifi_data, const base::Time& wifi_timestamp);
bool is_request_pending() const { return url_fetcher_ != NULL; }
const std::string api_key() const { return api_key_; }
private:
// net::URLFetcherDelegate
void OnURLFetchComplete(const net::URLFetcher* source) override;
const scoped_refptr<net::URLRequestContextGetter> url_context_;
const std::string api_key_;
const LocationResponseCallback location_response_callback_;
std::unique_ptr<net::URLFetcher> url_fetcher_;
// Keep a copy of the data sent in the request, so we can refer back to it
// when the response arrives.
WifiData wifi_data_;
base::Time wifi_timestamp_;
// The start time for the request.
base::TimeTicks request_start_time_;
DISALLOW_COPY_AND_ASSIGN(NetworkLocationRequest);
};
} // namespace device
#endif // DEVICE_GEOLOCATION_NETWORK_LOCATION_REQUEST_H_
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