gecko-dev/dom/system/NetworkGeolocationProvider.js
2013-01-07 16:34:51 +01:00

334 lines
11 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/. */
// Do not use this API without permission from Google.
// See http://www.google.com/support/enterprise/bin/request.py?contact_type=gme&utm_campaign=en-us-ptr-mz
// for more information.
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;
let gPrivateAccessToken = '';
let gPrivateAccessTime = 0;
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 privateBrowsingObserver(aSubject, aTopic, aData) {
gPrivateAccessToken = '';
gPrivateAccessTime = 0;
}
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;
this.lastRequestPrivate = false;
Services.obs.addObserver(privateBrowsingObserver, "last-pb-context-exited", 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, requestPrivate) {
LOG("watch called");
if (!this.wifiService && gUseScanning) {
this.wifiService = Cc["@mozilla.org/wifi/monitor;1"].getService(Components.interfaces.nsIWifiMonitor);
this.wifiService.startWatching(this);
this.lastRequestPrivate = requestPrivate;
}
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);
}
this.lastRequestPrivate = requestPrivate;
}
},
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;
}
// Although we aren't using cookies, we should err on the side of not
// saving any access tokens if the user asked us not to save cookies or
// has changed the lifetimePolicy. The access token in these cases is
// used and valid for the life of this object (eg. between startup and
// shutdown).
if (Services.prefs.getIntPref("network.cookie.lifetimePolicy") != 0)
Services.prefs.deleteBranch("geo.wifi.access_token.");
this.started = false;
},
setHighAccuracy: function(enable) {
},
getAccessTokenForURL: function(url)
{
// check to see if we have an access token:
let accessToken = "";
try {
if (this.lastRequestPrivate) {
accessToken = gPrivateAccessToken;
} else {
let accessTokenPrefName = "geo.wifi.access_token." + url;
accessToken = Services.prefs.getCharPref(accessTokenPrefName);
}
// check to see if it has expired
let accessTokenDate;
if (this.lastRequestPrivate) {
accessTokenDate = gPrivateAccessTime;
} else {
Services.prefs.getIntPref(accessTokenPrefName + ".time");
}
let accessTokenInterval = 1209600; // seconds in 2 weeks
try {
accessTokenInterval = Services.prefs.getIntPref("geo.wifi.access_token.recycle_interval");
} catch (e) {}
if ((Date.now() / 1000) - accessTokenDate > accessTokenInterval)
accessToken = "";
}
catch (e) {
accessToken = "";
}
return accessToken;
},
onChange: function(accessPoints) {
LOG("onChange called");
this.hasSeenWiFi = true;
let providerUrlBase = "https://maps.googleapis.com/maps/api/browserlocation/json";
try {
providerUrlBase = Services.prefs.getCharPref("geo.wifi.uri");
} catch (x) {};
let providerUrl;
let query = providerUrlBase.indexOf("?");
if (query == -1)
providerUrl = providerUrlBase + "?"
else
providerUrl = providerUrlBase + "&";
providerUrl = providerUrl + "browser=firefox&sensor=true";
let accessToken = this.getAccessTokenForURL(providerUrlBase);
if (accessToken !== "")
providerUrl = providerUrl + "&access_token="+accessToken;
function sort(a, b) {
return b.signal - a.signal;
};
function encode(ap) {
// make sure that the ssid doesn't contain any | chars.
ap.ssid = ap.ssid.replace("|", "\\|");
// gls service parses the | as fields
return "&wifi=mac:"+ap.mac+"|ssid:"+ap.ssid+"|ss:"+ap.signal;
};
if (accessPoints) {
providerUrl = providerUrl + accessPoints.sort(sort).map(encode).join("");
}
providerUrl = encodeURI(providerUrl);
// max length is 2k. make sure we are under that
let x = providerUrl.length - 2000;
if (x >= 0) {
// we need to trim
let doomed = providerUrl.lastIndexOf("&", 2000);
LOG("Doomed:"+doomed);
providerUrl = providerUrl.substring(0, doomed);
}
LOG("************************************* Sending request:\n" + providerUrl + "\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.mozBackgroundRequest = true;
xhr.open("GET", providerUrl, true);
xhr.channel.loadFlags = Ci.nsIChannel.LOAD_ANONYMOUS;
xhr.addEventListener("error", function(req) {
LOG("onerror: " + req);
}, false);
xhr.addEventListener("load", function (req) {
LOG("service returned: " + req.target.responseText);
response = JSON.parse(req.target.responseText);
/*
{
"status": "OK",
"accuracy": 150.0,
"location": {
"lat": -33.85702,
"lng": 151.21494
},
"access_token": "quijibo"
}
*/
if (response.status != "OK")
return;
if (response.location) {
let newLocation = new WifiGeoPositionObject(response.location.lat,
response.location.lng,
response.accuracy);
let update = Cc["@mozilla.org/geolocation/service;1"].getService(Ci.nsIGeolocationUpdate);
update.update(newLocation);
}
// Check to see if we have a new access token
let newAccessToken = response.access_token;
if (newAccessToken !== undefined)
{
let accessToken = "";
let accessTokenPrefName = "geo.wifi.access_token." + providerUrlBase;
if (this.lastRequestPrivate) {
accessTokenPrefName = gPrivateAccessToken;
} else {
try { accessToken = Services.prefs.getCharPref(accessTokenPrefName); } catch (e) {}
}
if (accessToken != newAccessToken) {
// no match, lets cache
LOG("New Access Token: " + newAccessToken + "\n" + accessTokenPrefName);
if (this.lastRequestPrivate) {
gPrivateAccessToken = newAccessToken;
gPrivateAccessTime = nowInSeconds();
} else {
try {
Services.prefs.setIntPref(accessTokenPrefName + ".time", nowInSeconds());
Services.prefs.setCharPref(accessTokenPrefName, newAccessToken);
} catch (x) {
// XXX temporary hack for bug 575346 to allow geolocation to function
}
}
}
}
}, false);
LOG("************************************* ------>>>> sending.");
xhr.send(null);
},
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]);