simple_geolocation_provider.cc revision 1320f92c476a1ad9d19dba2a48c72b75566198e9 
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
16namespace chromeos {
17
18namespace {
19const char kDefaultGeolocationProviderUrl[] =
20    "https://www.googleapis.com/geolocation/v1/geolocate?";
21}  // namespace
22
23SimpleGeolocationProvider::SimpleGeolocationProvider(
24    net::URLRequestContextGetter* url_context_getter,
25    const GURL& url)
26    : url_context_getter_(url_context_getter), url_(url) {
27}
28
29SimpleGeolocationProvider::~SimpleGeolocationProvider() {
30  DCHECK(thread_checker_.CalledOnValidThread());
31}
32
33void 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
53GURL SimpleGeolocationProvider::DefaultGeolocationProviderURL() {
54  return GURL(kDefaultGeolocationProviderUrl);
55}
56
57void 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
74