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- Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
-
- const Ci = Components.interfaces;
- const Cc = Components.classes;
-
- function nowInSeconds()
- {
- return Date.now() / 1000;
- }
-
- function LOG(aMsg) {
- //aMsg = ("*** WIFI GEO: " + aMsg);
- //Cc["@mozilla.org/consoleservice;1"].getService(Ci.nsIConsoleService).logStringMessage(aMsg);
- }
-
- function getAccessTokenForURL(url)
- {
- // check to see if we have an access token:
- var accessToken = "";
-
- try {
- var prefService = Cc["@mozilla.org/preferences-service;1"].getService(Ci.nsIPrefBranch);
-
- var accessTokenPrefName = "geo.wifi.access_token." + url;
- accessToken = prefService.getCharPref(accessTokenPrefName);
-
- // check to see if it has expired
- var accessTokenDate = prefService.getIntPref(accessTokenPrefName + ".time");
-
- var accessTokenInterval = 1209600; /* seconds in 2 weeks */
- try {
- accessTokenInterval = prefService.getIntPref("geo.wifi.access_token.recycle_interval");
- } catch (e) {}
-
- if (nowInSeconds() - accessTokenDate > accessTokenInterval)
- accessToken = "";
- }
- catch (e) {
- accessToken = "";
- LOG("Error: "+ e);
- }
- return accessToken;
- }
-
- function WifiGeoCoordsObject(lat, lon, acc) {
- this.latitude = lat;
- this.longitude = lon;
- this.accuracy = acc;
- };
-
- WifiGeoCoordsObject.prototype = {
-
- QueryInterface: XPCOMUtils.generateQI([Ci.nsIDOMGeoPositionCoords, Ci.nsIClassInfo]),
-
- getInterfaces: function(countRef) {
- var interfaces = [Ci.nsIDOMGeoPositionCoords, Ci.nsIClassInfo, Ci.nsISupports];
- countRef.value = interfaces.length;
- return interfaces;
- },
-
- getHelperForLanguage: function(language) null,
- contractID: "",
- classDescription: "wifi geo position coords object",
- classID: null,
- implementationLanguage: Ci.nsIProgrammingLanguage.JAVASCRIPT,
- flags: Ci.nsIClassInfo.DOM_OBJECT,
-
- latitude: 0,
- longitude: 0,
- accuracy: 0,
-
- altitude: 0,
- altitudeAccuracy: 0,
- heading: 0,
- speed: 0,
- };
-
- function WifiGeoPositionObject(lat, lon, acc) {
- this.coords = new WifiGeoCoordsObject(lat, lon, acc);
- this.timestamp = Date.now();
- };
-
- WifiGeoPositionObject.prototype = {
-
- QueryInterface: XPCOMUtils.generateQI([Ci.nsIDOMGeoPosition, Ci.nsIClassInfo]),
-
- // Class Info is required to be able to pass objects back into the DOM.
- getInterfaces: function(countRef) {
- var interfaces = [Ci.nsIDOMGeoPosition, Ci.nsIClassInfo, Ci.nsISupports];
- countRef.value = interfaces.length;
- return interfaces;
- },
-
- getHelperForLanguage: function(language) null,
- contractID: "",
- classDescription: "wifi geo location position object",
- classID: null,
- implementationLanguage: Ci.nsIProgrammingLanguage.JAVASCRIPT,
- flags: Ci.nsIClassInfo.DOM_OBJECT,
-
- coords: null,
- timestamp: 0,
- };
-
- function WifiGeoPositionProvider() {};
- WifiGeoPositionProvider.prototype = {
- classDescription: "A component that returns a geolocation based on WIFI",
- classID: Components.ID("{77DA64D3-7458-4920-9491-86CC9914F904}"),
- contractID: "@mozilla.org/geolocation/provider;1",
- QueryInterface: XPCOMUtils.generateQI([Ci.nsIGeolocationProvider, Ci.nsIWifiListener, Ci.nsITimerCallback]),
-
- provider_url: null,
- wifi_service: null,
- timer: null,
- hasSeenWiFi: false,
-
- observe: function (aSubject, aTopic, aData) {
- if (aTopic == "private-browsing") {
- if (aData == "enter" || aData == "exit") {
- let psvc = Cc["@mozilla.org/preferences-service;1"].getService(Ci.nsIPrefService);
- try {
- let branch = psvc.getBranch("geo.wifi.access_token.");
- branch.deleteBranch("");
- } catch (e) {}
- }
- }
- },
-
- startup: function() {
- LOG("startup called");
-
- var prefService = Cc["@mozilla.org/preferences-service;1"].getService(Ci.nsIPrefBranch);
- this.provider_url = prefService.getCharPref("geo.wifi.uri");
- LOG("provider url = " + this.provider_url);
-
- // if we don't see anything in 5 seconds, kick of one IP geo lookup.
- this.hasSeenWiFi = false;
- this.timer = Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer);
- this.timer.initWithCallback(this, 5000, this.timer.TYPE_ONE_SHOT);
-
- let os = Cc["@mozilla.org/observer-service;1"].getService(Ci.nsIObserverService);
- os.addObserver(this, "private-browsing", false);
- },
-
- isReady: function() {
- LOG("isReady called");
- return true
- },
-
- watch: function(c) {
- LOG("watch called");
- if (!this.wifi_service) {
- this.wifi_service = Cc["@mozilla.org/wifi/monitor;1"].getService(Components.interfaces.nsIWifiMonitor);
- this.wifi_service.startWatching(this);
- }
- },
-
- shutdown: function() {
- LOG("shutdown called");
- if(this.wifi_service)
- this.wifi_service.stopWatching(this);
- this.wifi_service = 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).e
- let prefBranch = Cc["@mozilla.org/preferences-service;1"].getService(Ci.nsIPrefBranch);
- if (prefBranch.getIntPref("network.cookie.lifetimePolicy") != 0)
- prefBranch.deleteBranch("geo.wifi.access_token.");
-
- let os = Cc["@mozilla.org/observer-service;1"].getService(Ci.nsIObserverService);
- os.removeObserver(this, "private-browsing");
- },
-
- onChange: function(accessPoints) {
-
- LOG("onChange called");
- this.hasSeenWiFi = true;
-
- var prefService = Cc["@mozilla.org/preferences-service;1"].getService(Ci.nsIPrefBranch);
-
- // send our request to a wifi geolocation network provider:
- var xhr = Components.classes["@mozilla.org/xmlextras/xmlhttprequest;1"].createInstance(Ci.nsIXMLHttpRequest);
-
- // This is a background load
- xhr.mozBackgroundRequest = true;
-
- xhr.open("POST", this.provider_url, false);
-
- // set something so that we can strip cookies
- xhr.channel.loadFlags = Ci.nsIChannel.LOAD_ANONYMOUS;
-
- xhr.onerror = function(req) {
- LOG("onerror: " + req);
- };
-
- xhr.onload = function (req) {
-
- LOG("service returned: " + req.target.responseText);
-
- // if we get a bad response, we will throw and never report a location
- var response = JSON.parse(req.target.responseText);
-
- // response looks something like:
- // {"location":{"latitude":51.5090332,"longitude":-0.1212726,"accuracy":150.0},"access_token":"2:jVhRZJ-j6PiRchH_:RGMrR0W1BiwdZs12"}
-
- // Check to see if we have a new access token
- var newAccessToken = response.access_token;
- if (newAccessToken != undefined)
- {
- var prefService = Cc["@mozilla.org/preferences-service;1"].getService(Ci.nsIPrefBranch);
- var accessToken = "";
- var accessTokenPrefName = "geo.wifi.access_token." + req.target.channel.URI.spec;
- try { accessToken = prefService.getCharPref(accessTokenPrefName); } catch (e) {}
-
- if (accessToken != newAccessToken) {
- // no match, lets cache
- LOG("New Access Token: " + newAccessToken + "\n" + accessTokenPrefName);
-
- prefService.setIntPref(accessTokenPrefName + ".time", nowInSeconds());
- prefService.setCharPref(accessTokenPrefName, newAccessToken);
- }
- }
-
- var newLocation = new WifiGeoPositionObject(response.location.latitude,
- response.location.longitude,
- response.location.accuracy);
-
- var update = Cc["@mozilla.org/geolocation/service;1"].getService(Ci.nsIGeolocationUpdate);
- update.update(newLocation);
- };
-
- var accessToken = getAccessTokenForURL(this.provider_url);
-
- var request = {
- version: "1.1.0",
- // request_address: true,
- };
-
- if (accessToken != "")
- request.access_token = accessToken;
-
- if (accessPoints != null) {
- request.wifi_towers = accessPoints.map(function (ap) ({
- mac_address: ap.mac,
- ssid: ap.ssid,
- signal_strength: ap.signal,
- }));
- }
-
- var jsonString = JSON.stringify(request);
- LOG("client sending: " + jsonString);
-
- xhr.send(jsonString);
- },
-
- onError: function (code) {
- LOG("wifi error: " + code);
- },
-
- notify: function (timer) {
- if (this.hasSeenWiFi == false)
- this.onChange(null);
- this.timer = null;
- },
-
- };
-
- var components = [WifiGeoPositionProvider];
- function NSGetModule(compMgr, fileSpec) {
- return XPCOMUtils.generateModule(components);
- }
-