gecko-dev/dom/system/NetworkGeolocationProvider.js
Ed Morley 926ee7435c Bug 899990 - Null check xhr.response to avoid spammy JS exceptions; r=jdm
--HG--
extra : rebase_source : d1b78bc695896565c8ac7d327da62f324a44bb51
2013-07-31 18:02:05 +01:00

222 lines
6.6 KiB
JavaScript
Executable File

/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
// See https://developers.google.com/maps/documentation/business/geolocation/
Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
Components.utils.import("resource://gre/modules/Services.jsm");
const Ci = Components.interfaces;
const Cc = Components.classes;
let gLoggingEnabled = false;
let gTestingEnabled = false;
let gUseScanning = true;
function LOG(aMsg) {
if (gLoggingEnabled)
{
aMsg = "*** WIFI GEO: " + aMsg + "\n";
Cc["@mozilla.org/consoleservice;1"].getService(Ci.nsIConsoleService).logStringMessage(aMsg);
dump(aMsg);
}
}
function WifiGeoCoordsObject(lat, lon, acc, alt, altacc) {
this.latitude = lat;
this.longitude = lon;
this.accuracy = acc;
this.altitude = alt;
this.altitudeAccuracy = altacc;
}
WifiGeoCoordsObject.prototype = {
QueryInterface: XPCOMUtils.generateQI([Ci.nsIDOMGeoPositionCoords]),
classInfo: XPCOMUtils.generateCI({interfaces: [Ci.nsIDOMGeoPositionCoords],
flags: Ci.nsIClassInfo.DOM_OBJECT,
classDescription: "wifi geo position coords object"}),
};
function WifiGeoPositionObject(lat, lng, acc) {
this.coords = new WifiGeoCoordsObject(lat, lng, acc, 0, 0);
this.address = null;
this.timestamp = Date.now();
}
WifiGeoPositionObject.prototype = {
QueryInterface: XPCOMUtils.generateQI([Ci.nsIDOMGeoPosition]),
// Class Info is required to be able to pass objects back into the DOM.
classInfo: XPCOMUtils.generateCI({interfaces: [Ci.nsIDOMGeoPosition],
flags: Ci.nsIClassInfo.DOM_OBJECT,
classDescription: "wifi geo location position object"}),
};
function WifiGeoPositionProvider() {
try {
gLoggingEnabled = Services.prefs.getBoolPref("geo.wifi.logging.enabled");
} catch (e) {}
try {
gTestingEnabled = Services.prefs.getBoolPref("geo.wifi.testing");
} catch (e) {}
try {
gUseScanning = Services.prefs.getBoolPref("geo.wifi.scan");
} catch (e) {}
this.wifiService = null;
this.timer = null;
this.hasSeenWiFi = false;
this.started = false;
}
WifiGeoPositionProvider.prototype = {
classID: Components.ID("{77DA64D3-7458-4920-9491-86CC9914F904}"),
QueryInterface: XPCOMUtils.generateQI([Ci.nsIGeolocationProvider,
Ci.nsIWifiListener,
Ci.nsITimerCallback]),
startup: function() {
if (this.started)
return;
this.started = true;
this.hasSeenWiFi = false;
LOG("startup called. testing mode is" + gTestingEnabled);
// if we don't see anything in 5 seconds, kick of one IP geo lookup.
// if we are testing, just hammer this callback so that we are more or less
// always sending data. It doesn't matter if we have an access point or not.
this.timer = Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer);
if (!gTestingEnabled)
this.timer.initWithCallback(this, 5000, this.timer.TYPE_ONE_SHOT);
else
this.timer.initWithCallback(this, 200, this.timer.TYPE_REPEATING_SLACK);
},
watch: function(c) {
LOG("watch called");
if (!this.wifiService && gUseScanning) {
this.wifiService = Cc["@mozilla.org/wifi/monitor;1"].getService(Components.interfaces.nsIWifiMonitor);
this.wifiService.startWatching(this);
}
if (this.hasSeenWiFi) {
this.hasSeenWiFi = false;
if (gUseScanning) {
this.wifiService.stopWatching(this);
this.wifiService.startWatching(this);
} else {
// For testing situations, ensure that we always trigger an update.
this.timer.initWithCallback(this, 5000, this.timer.TYPE_ONE_SHOT);
}
}
},
shutdown: function() {
LOG("shutdown called");
if(this.wifiService) {
this.wifiService.stopWatching(this);
this.wifiService = null;
}
if (this.timer != null) {
this.timer.cancel();
this.timer = null;
}
this.started = false;
},
setHighAccuracy: function(enable) {
},
onChange: function(accessPoints) {
LOG("onChange called");
this.hasSeenWiFi = true;
let url = Services.urlFormatter.formatURLPref("geo.wifi.uri");
function isPublic(ap) {
let mask = "_nomap"
let result = ap.ssid.indexOf(mask, ap.ssid.length - mask.length) == -1;
if (result != -1) {
LOG("Filtering out " + ap.ssid);
}
return result;
};
function sort(a, b) {
return b.signal - a.signal;
};
function encode(ap) {
return { 'macAddress': ap.mac, 'signalStrength': ap.signal };
};
var data;
if (accessPoints) {
data = JSON.stringify({wifiAccessPoints: accessPoints.filter(isPublic).sort(sort).map(encode)})
}
LOG("************************************* Sending request:\n" + url + "\n");
// send our request to a wifi geolocation network provider:
let xhr = Components.classes["@mozilla.org/xmlextras/xmlhttprequest;1"]
.createInstance(Ci.nsIXMLHttpRequest);
// This is a background load
xhr.open("POST", url, true);
xhr.setRequestHeader("Content-Type", "application/json; charset=UTF-8");
xhr.responseType = "json";
xhr.mozBackgroundRequest = true;
xhr.channel.loadFlags = Ci.nsIChannel.LOAD_ANONYMOUS;
xhr.onerror = function() {
LOG("onerror: " + xhr);
};
xhr.onload = function() {
LOG("gls returned status: " + xhr.status + " --> " + JSON.stringify(xhr.response));
if (xhr.status != 200) {
return;
}
if (!xhr.response || !xhr.response.location) {
return;
}
let newLocation = new WifiGeoPositionObject(xhr.response.location.lat,
xhr.response.location.lng,
xhr.response.accuracy);
Cc["@mozilla.org/geolocation/service;1"].getService(Ci.nsIGeolocationUpdate)
.update(newLocation);
};
LOG("************************************* ------>>>> sending " + data);
xhr.send(data);
},
onError: function (code) {
LOG("wifi error: " + code);
},
notify: function (timer) {
if (gTestingEnabled || !gUseScanning) {
// if we are testing, timer is repeating
this.onChange(null);
}
else {
if (!this.hasSeenWiFi)
this.onChange(null);
this.timer = null;
}
},
};
this.NSGetFactory = XPCOMUtils.generateNSGetFactory([WifiGeoPositionProvider]);