src/chrome/browser/chromeos/geolocation/simple_geolocation_provider.cc

   1 // Copyright 2014 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 #include "chrome/browser/chromeos/geolocation/simple_geolocation_provider.h"
   6
   7 #include <algorithm>
   8 #include <iterator>
   9
  10 #include "base/bind.h"
  11 #include "base/time/time.h"
  12 #include "chrome/browser/chromeos/geolocation/geoposition.h"
  13 #include "net/url_request/url_request_context_getter.h"
  14 #include "url/gurl.h"
  15
  16 namespace chromeos {
  17
  18 namespace {
  19 const char kDefaultGeolocationProviderUrl[] =
  20     "https://www.googleapis.com/geolocation/v1/geolocate?";
  21 }  // namespace
  22
  23 SimpleGeolocationProvider::SimpleGeolocationProvider(
  24     net::URLRequestContextGetter* url_context_getter,
  25     const GURL& url)
  26     : url_context_getter_(url_context_getter), url_(url) {
  27 }
  28
  29 SimpleGeolocationProvider::~SimpleGeolocationProvider() {
  30   DCHECK(thread_checker_.CalledOnValidThread());
  31 }
  32
  33 void SimpleGeolocationProvider::RequestGeolocation(
  34     base::TimeDelta timeout,
  35     SimpleGeolocationRequest::ResponseCallback callback) {
  36   DCHECK(thread_checker_.CalledOnValidThread());
  37   SimpleGeolocationRequest* request(
  38       new SimpleGeolocationRequest(url_context_getter_.get(), url_, timeout));
  39   requests_.push_back(request);
  40
  41   // SimpleGeolocationProvider owns all requests. It is safe to pass unretained
  42   // "this" because destruction of SimpleGeolocationProvider cancels all
  43   // requests.
  44   SimpleGeolocationRequest::ResponseCallback callback_tmp(
  45       base::Bind(&SimpleGeolocationProvider::OnGeolocationResponse,
  46                  base::Unretained(this),
  47                  request,
  48                  callback));
  49   request->MakeRequest(callback_tmp);
  50 }
  51
  52 // static
  53 GURL SimpleGeolocationProvider::DefaultGeolocationProviderURL() {
  54   return GURL(kDefaultGeolocationProviderUrl);
  55 }
  56
  57 void SimpleGeolocationProvider::OnGeolocationResponse(
  58     SimpleGeolocationRequest* request,
  59     SimpleGeolocationRequest::ResponseCallback callback,
  60     const Geoposition& geoposition,
  61     bool server_error,
  62     const base::TimeDelta elapsed) {
  63   DCHECK(thread_checker_.CalledOnValidThread());
  64
  65   callback.Run(geoposition, server_error, elapsed);
  66
  67   ScopedVector<SimpleGeolocationRequest>::iterator new_end =
  68       std::remove(requests_.begin(), requests_.end(), request);
  69   DCHECK_EQ(std::distance(new_end, requests_.end()), 1);
  70   requests_.erase(new_end, requests_.end());
  71 }
  72
  73 }  // namespace chromeos