Reland 2:Geolocation: move from content/browser to device/

content/browser/geolocation/network_location_request.cc

Index: content/browser/geolocation/network_location_request.cc
diff --git a/content/browser/geolocation/network_location_request.cc b/content/browser/geolocation/network_location_request.cc
deleted file mode 100644
index 18b052691b57dbd034abd4b3b549e41394c3fd84..0000000000000000000000000000000000000000
--- a/content/browser/geolocation/network_location_request.cc
+++ /dev/null
@@ -1,427 +0,0 @@
-// 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.
-
-#include "content/browser/geolocation/network_location_request.h"
-
-#include <stdint.h>
-
-#include <limits>
-#include <set>
-#include <string>
-
-#include "base/json/json_reader.h"
-#include "base/json/json_writer.h"
-#include "base/metrics/histogram.h"
-#include "base/metrics/sparse_histogram.h"
-#include "base/strings/string_number_conversions.h"
-#include "base/strings/utf_string_conversions.h"
-#include "base/values.h"
-#include "content/browser/geolocation/location_arbitrator_impl.h"
-#include "content/public/common/geoposition.h"
-#include "google_apis/google_api_keys.h"
-#include "net/base/escape.h"
-#include "net/base/load_flags.h"
-#include "net/url_request/url_fetcher.h"
-#include "net/url_request/url_request_context_getter.h"
-#include "net/url_request/url_request_status.h"
-
-namespace content {
-namespace {
-
-const char kAccessTokenString[] = "accessToken";
-const char kLocationString[] = "location";
-const char kLatitudeString[] = "lat";
-const char kLongitudeString[] = "lng";
-const char kAccuracyString[] = "accuracy";
-
-enum NetworkLocationRequestEvent {
-  // NOTE: Do not renumber these as that would confuse interpretation of
-  // previously logged data. When making changes, also update the enum list
-  // in tools/metrics/histograms/histograms.xml to keep it in sync.
-  NETWORK_LOCATION_REQUEST_EVENT_REQUEST_START = 0,
-  NETWORK_LOCATION_REQUEST_EVENT_REQUEST_CANCEL = 1,
-  NETWORK_LOCATION_REQUEST_EVENT_RESPONSE_SUCCESS = 2,
-  NETWORK_LOCATION_REQUEST_EVENT_RESPONSE_NOT_OK = 3,
-  NETWORK_LOCATION_REQUEST_EVENT_RESPONSE_EMPTY = 4,
-  NETWORK_LOCATION_REQUEST_EVENT_RESPONSE_MALFORMED = 5,
-  NETWORK_LOCATION_REQUEST_EVENT_RESPONSE_INVALID_FIX = 6,
-
-  // NOTE: Add entries only immediately above this line.
-  NETWORK_LOCATION_REQUEST_EVENT_COUNT = 7
-};
-
-void RecordUmaEvent(NetworkLocationRequestEvent event) {
-  UMA_HISTOGRAM_ENUMERATION("Geolocation.NetworkLocationRequest.Event",
-      event, NETWORK_LOCATION_REQUEST_EVENT_COUNT);
-}
-
-void RecordUmaResponseCode(int code) {
-  UMA_HISTOGRAM_SPARSE_SLOWLY("Geolocation.NetworkLocationRequest.ResponseCode",
-      code);
-}
-
-void RecordUmaAccessPoints(int count) {
-  const int min = 0;
-  const int max = 20;
-  const int buckets = 21;
-  UMA_HISTOGRAM_CUSTOM_COUNTS("Geolocation.NetworkLocationRequest.AccessPoints",
-      count, min, max, buckets);
-}
-
-// Local functions
-// Creates the request url to send to the server.
-GURL FormRequestURL(const GURL& url);
-
-void FormUploadData(const WifiData& wifi_data,
-                    const base::Time& wifi_timestamp,
-                    const base::string16& access_token,
-                    std::string* upload_data);
-
-// Attempts to extract a position from the response. Detects and indicates
-// various failure cases.
-void GetLocationFromResponse(bool http_post_result,
-                             int status_code,
-                             const std::string& response_body,
-                             const base::Time& wifi_timestamp,
-                             const GURL& server_url,
-                             Geoposition* position,
-                             base::string16* access_token);
-
-// Parses the server response body. Returns true if parsing was successful.
-// Sets |*position| to the parsed location if a valid fix was received,
-// otherwise leaves it unchanged.
-bool ParseServerResponse(const std::string& response_body,
-                         const base::Time& wifi_timestamp,
-                         Geoposition* position,
-                         base::string16* access_token);
-void AddWifiData(const WifiData& wifi_data,
-                 int age_milliseconds,
-                 base::DictionaryValue* request);
-}  // namespace
-
-int NetworkLocationRequest::url_fetcher_id_for_tests = 0;
-
-NetworkLocationRequest::NetworkLocationRequest(
-    const scoped_refptr<net::URLRequestContextGetter>& context,
-    const GURL& url,
-    LocationResponseCallback callback)
-    : url_context_(context), location_response_callback_(callback), url_(url) {
-}
-
-NetworkLocationRequest::~NetworkLocationRequest() {
-}
-
-bool NetworkLocationRequest::MakeRequest(const base::string16& access_token,
-                                         const WifiData& wifi_data,
-                                         const base::Time& wifi_timestamp) {
-  RecordUmaEvent(NETWORK_LOCATION_REQUEST_EVENT_REQUEST_START);
-  RecordUmaAccessPoints(wifi_data.access_point_data.size());
-  if (url_fetcher_ != NULL) {
-    DVLOG(1) << "NetworkLocationRequest : Cancelling pending request";
-    RecordUmaEvent(NETWORK_LOCATION_REQUEST_EVENT_REQUEST_CANCEL);
-    url_fetcher_.reset();
-  }
-  wifi_data_ = wifi_data;
-  wifi_timestamp_ = wifi_timestamp;
-
-  GURL request_url = FormRequestURL(url_);
-  url_fetcher_ = net::URLFetcher::Create(url_fetcher_id_for_tests, request_url,
-                                         net::URLFetcher::POST, this);
-  url_fetcher_->SetRequestContext(url_context_.get());
-  std::string upload_data;
-  FormUploadData(wifi_data, wifi_timestamp, access_token, &upload_data);
-  url_fetcher_->SetUploadData("application/json", upload_data);
-  url_fetcher_->SetLoadFlags(
-      net::LOAD_BYPASS_CACHE | net::LOAD_DISABLE_CACHE |
-      net::LOAD_DO_NOT_SAVE_COOKIES | net::LOAD_DO_NOT_SEND_COOKIES |
-      net::LOAD_DO_NOT_SEND_AUTH_DATA);
-
-  request_start_time_ = base::TimeTicks::Now();
-  url_fetcher_->Start();
-  return true;
-}
-
-void NetworkLocationRequest::OnURLFetchComplete(
-    const net::URLFetcher* source) {
-  DCHECK_EQ(url_fetcher_.get(), source);
-
-  net::URLRequestStatus status = source->GetStatus();
-  int response_code = source->GetResponseCode();
-  RecordUmaResponseCode(response_code);
-
-  Geoposition position;
-  base::string16 access_token;
-  std::string data;
-  source->GetResponseAsString(&data);
-  GetLocationFromResponse(status.is_success(), response_code, data,
-                          wifi_timestamp_, source->GetURL(), &position,
-                          &access_token);
-  const bool server_error =
-      !status.is_success() || (response_code >= 500 && response_code < 600);
-  url_fetcher_.reset();
-
-  if (!server_error) {
-    const base::TimeDelta request_time =
-        base::TimeTicks::Now() - request_start_time_;
-
-    UMA_HISTOGRAM_CUSTOM_TIMES(
-        "Net.Wifi.LbsLatency",
-        request_time,
-        base::TimeDelta::FromMilliseconds(1),
-        base::TimeDelta::FromSeconds(10),
-        100);
-  }
-
-  DVLOG(1) << "NetworkLocationRequest::OnURLFetchComplete() : run callback.";
-  location_response_callback_.Run(
-      position, server_error, access_token, wifi_data_);
-}
-
-// Local functions.
-namespace {
-
-struct AccessPointLess {
-  bool operator()(const AccessPointData* ap1,
-                  const AccessPointData* ap2) const {
-    return ap2->radio_signal_strength < ap1->radio_signal_strength;
-  }
-};
-
-GURL FormRequestURL(const GURL& url) {
-  if (url == LocationArbitratorImpl::DefaultNetworkProviderURL()) {
-    std::string api_key = google_apis::GetAPIKey();
-    if (!api_key.empty()) {
-      std::string query(url.query());
-      if (!query.empty())
-        query += "&";
-      query += "key=" + net::EscapeQueryParamValue(api_key, true);
-      GURL::Replacements replacements;
-      replacements.SetQueryStr(query);
-      return url.ReplaceComponents(replacements);
-    }
-  }
-  return url;
-}
-
-void FormUploadData(const WifiData& wifi_data,
-                    const base::Time& wifi_timestamp,
-                    const base::string16& access_token,
-                    std::string* upload_data) {
-  int age = std::numeric_limits<int32_t>::min();  // Invalid so AddInteger()
-                                                  // will ignore.
-  if (!wifi_timestamp.is_null()) {
-    // Convert absolute timestamps into a relative age.
-    int64_t delta_ms = (base::Time::Now() - wifi_timestamp).InMilliseconds();
-    if (delta_ms >= 0 && delta_ms < std::numeric_limits<int32_t>::max())
-      age = static_cast<int>(delta_ms);
-  }
-
-  base::DictionaryValue request;
-  AddWifiData(wifi_data, age, &request);
-  if (!access_token.empty())
-    request.SetString(kAccessTokenString, access_token);
-  base::JSONWriter::Write(request, upload_data);
-}
-
-void AddString(const std::string& property_name, const std::string& value,
-               base::DictionaryValue* dict) {
-  DCHECK(dict);
-  if (!value.empty())
-    dict->SetString(property_name, value);
-}
-
-void AddInteger(const std::string& property_name, int value,
-                base::DictionaryValue* dict) {
-  DCHECK(dict);
-  if (value != std::numeric_limits<int32_t>::min())
-    dict->SetInteger(property_name, value);
-}
-
-void AddWifiData(const WifiData& wifi_data,
-                 int age_milliseconds,
-                 base::DictionaryValue* request) {
-  DCHECK(request);
-
-  if (wifi_data.access_point_data.empty())
-    return;
-
-  typedef std::multiset<const AccessPointData*, AccessPointLess> AccessPointSet;
-  AccessPointSet access_points_by_signal_strength;
-
-  for (const auto& ap_data : wifi_data.access_point_data)
-    access_points_by_signal_strength.insert(&ap_data);
-
-  base::ListValue* wifi_access_point_list = new base::ListValue();
-  for (auto* ap_data : access_points_by_signal_strength) {
-    base::DictionaryValue* wifi_dict = new base::DictionaryValue();
-    AddString("macAddress", base::UTF16ToUTF8(ap_data->mac_address), wifi_dict);
-    AddInteger("signalStrength", ap_data->radio_signal_strength, wifi_dict);
-    AddInteger("age", age_milliseconds, wifi_dict);
-    AddInteger("channel", ap_data->channel, wifi_dict);
-    AddInteger("signalToNoiseRatio", ap_data->signal_to_noise, wifi_dict);
-    wifi_access_point_list->Append(wifi_dict);
-  }
-  request->Set("wifiAccessPoints", wifi_access_point_list);
-}
-
-void FormatPositionError(const GURL& server_url,
-                         const std::string& message,
-                         Geoposition* position) {
-    position->error_code = Geoposition::ERROR_CODE_POSITION_UNAVAILABLE;
-    position->error_message = "Network location provider at '";
-    position->error_message += server_url.GetOrigin().spec();
-    position->error_message += "' : ";
-    position->error_message += message;
-    position->error_message += ".";
-    VLOG(1) << "NetworkLocationRequest::GetLocationFromResponse() : "
-            << position->error_message;
-}
-
-void GetLocationFromResponse(bool http_post_result,
-                             int status_code,
-                             const std::string& response_body,
-                             const base::Time& wifi_timestamp,
-                             const GURL& server_url,
-                             Geoposition* position,
-                             base::string16* access_token) {
-  DCHECK(position);
-  DCHECK(access_token);
-
-  // HttpPost can fail for a number of reasons. Most likely this is because
-  // we're offline, or there was no response.
-  if (!http_post_result) {
-    FormatPositionError(server_url, "No response received", position);
-    RecordUmaEvent(NETWORK_LOCATION_REQUEST_EVENT_RESPONSE_EMPTY);
-    return;
-  }
-  if (status_code != 200) {  // HTTP OK.
-    std::string message = "Returned error code ";
-    message += base::IntToString(status_code);
-    FormatPositionError(server_url, message, position);
-    RecordUmaEvent(NETWORK_LOCATION_REQUEST_EVENT_RESPONSE_NOT_OK);
-    return;
-  }
-  // We use the timestamp from the wifi data that was used to generate
-  // this position fix.
-  if (!ParseServerResponse(response_body, wifi_timestamp, position,
-                           access_token)) {
-    // We failed to parse the repsonse.
-    FormatPositionError(server_url, "Response was malformed", position);
-    RecordUmaEvent(NETWORK_LOCATION_REQUEST_EVENT_RESPONSE_MALFORMED);
-    return;
-  }
-  // The response was successfully parsed, but it may not be a valid
-  // position fix.
-  if (!position->Validate()) {
-    FormatPositionError(server_url,
-                        "Did not provide a good position fix", position);
-    RecordUmaEvent(NETWORK_LOCATION_REQUEST_EVENT_RESPONSE_INVALID_FIX);
-    return;
-  }
-  RecordUmaEvent(NETWORK_LOCATION_REQUEST_EVENT_RESPONSE_SUCCESS);
-}
-
-// Numeric values without a decimal point have type integer and IsDouble() will
-// return false. This is convenience function for detecting integer or floating
-// point numeric values. Note that isIntegral() includes boolean values, which
-// is not what we want.
-bool GetAsDouble(const base::DictionaryValue& object,
-                 const std::string& property_name,
-                 double* out) {
-  DCHECK(out);
-  const base::Value* value = NULL;
-  if (!object.Get(property_name, &value))
-    return false;
-  int value_as_int;
-  DCHECK(value);
-  if (value->GetAsInteger(&value_as_int)) {
-    *out = value_as_int;
-    return true;
-  }
-  return value->GetAsDouble(out);
-}
-
-bool ParseServerResponse(const std::string& response_body,
-                         const base::Time& wifi_timestamp,
-                         Geoposition* position,
-                         base::string16* access_token) {
-  DCHECK(position);
-  DCHECK(!position->Validate());
-  DCHECK(position->error_code == Geoposition::ERROR_CODE_NONE);
-  DCHECK(access_token);
-  DCHECK(!wifi_timestamp.is_null());
-
-  if (response_body.empty()) {
-    LOG(WARNING) << "ParseServerResponse() : Response was empty.";
-    return false;
-  }
-  DVLOG(1) << "ParseServerResponse() : Parsing response " << response_body;
-
-  // Parse the response, ignoring comments.
-  std::string error_msg;
-  std::unique_ptr<base::Value> response_value =
-      base::JSONReader::ReadAndReturnError(response_body, base::JSON_PARSE_RFC,
-                                           NULL, &error_msg);
-  if (response_value == NULL) {
-    LOG(WARNING) << "ParseServerResponse() : JSONReader failed : "
-                 << error_msg;
-    return false;
-  }
-
-  if (!response_value->IsType(base::Value::TYPE_DICTIONARY)) {
-    VLOG(1) << "ParseServerResponse() : Unexpected response type "
-            << response_value->GetType();
-    return false;
-  }
-  const base::DictionaryValue* response_object =
-      static_cast<base::DictionaryValue*>(response_value.get());
-
-  // Get the access token, if any.
-  response_object->GetString(kAccessTokenString, access_token);
-
-  // Get the location
-  const base::Value* location_value = NULL;
-  if (!response_object->Get(kLocationString, &location_value)) {
-    VLOG(1) << "ParseServerResponse() : Missing location attribute.";
-    // GLS returns a response with no location property to represent
-    // no fix available; return true to indicate successful parse.
-    return true;
-  }
-  DCHECK(location_value);
-
-  if (!location_value->IsType(base::Value::TYPE_DICTIONARY)) {
-    if (!location_value->IsType(base::Value::TYPE_NULL)) {
-      VLOG(1) << "ParseServerResponse() : Unexpected location type "
-              << location_value->GetType();
-      // If the network provider was unable to provide a position fix, it should
-      // return a HTTP 200, with "location" : null. Otherwise it's an error.
-      return false;
-    }
-    return true;  // Successfully parsed response containing no fix.
-  }
-  const base::DictionaryValue* location_object =
-      static_cast<const base::DictionaryValue*>(location_value);
-
-  // latitude and longitude fields are always required.
-  double latitude = 0;
-  double longitude = 0;
-  if (!GetAsDouble(*location_object, kLatitudeString, &latitude) ||
-      !GetAsDouble(*location_object, kLongitudeString, &longitude)) {
-    VLOG(1) << "ParseServerResponse() : location lacks lat and/or long.";
-    return false;
-  }
-  // All error paths covered: now start actually modifying postion.
-  position->latitude = latitude;
-  position->longitude = longitude;
-  position->timestamp = wifi_timestamp;
-
-  // Other fields are optional.
-  GetAsDouble(*response_object, kAccuracyString, &position->accuracy);
-
-  return true;
-}
-
-}  // namespace
-
-}  // namespace content