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我在GitHub上发现了此服务（请参阅下文），并想知道如何使用此服务>点击按钮。我在我的Ionic应用程序中使用它来使用Google+ OAuth进行登录。如何在AngularJS中使用工厂服务？
我是AngularJS的新手。帮我。
var googleLoginService = angular.module('GoogleLoginService', ['ngStorage']);
googleLoginService.factory('timeStorage', ['$localStorage', function ($localStorage) {
var timeStorage = {};
timeStorage.cleanUp = function() {
var cur_time = new Date().getTime();
for (var i = 0; i < localStorage.length; i++) {
var key = localStorage.key(i);
if (key.indexOf('_expire') === -1) {
var new_key = key + "_expire";
var value = localStorage.getItem(new_key);
if (value && cur_time > value) {
localStorage.removeItem(key);
localStorage.removeItem(new_key);
}
}
}
};
timeStorage.remove = function (key) {
this.cleanUp();
var time_key = key + '_expire';
$localStorage[key] = false;
$localStorage[time_key] = false;
};
timeStorage.set = function (key, data, hours) {
this.cleanUp();
$localStorage[key] = data;
var time_key = key + '_expire';
var time = new Date().getTime();
time = time + (hours * 1 * 60 * 60 * 1000);
$localStorage[time_key] = time;
};
timeStorage.get = function (key) {
this.cleanUp();
var time_key = key + "_expire";
if (!$localStorage[time_key]) {
return false;
}
var expire = $localStorage[time_key] * 1;
if (new Date().getTime() > expire) {
$localStorage[key] = null;
$localStorage[time_key] = null;
return false;
}
return $localStorage[key];
};
return timeStorage;
}]);
googleLoginService.factory('googleLogin', [
'$http', '$q', '$interval', '$log', 'timeStorage',
function ($http, $q, $interval, $log, timeStorage) {
var service = {};
service.access_token = false;
service.redirect_url = 'http://127.0.0.1:81/google_demo/www/';
service.client_id = '1234567890';
service.secret = 'xxxxxxxxxxxxxxxxx';
service.scope = 'https://www.googleapis.com/auth/userinfo.email https://www.googleapis.com/auth/userinfo.profile https://www.googleapis.com/auth/plus.me';
service.gulp = function (url, name) {
url = url.substring(url.indexOf('?') + 1, url.length);
return url.replace('code=', '');
};
service.authorize = function (options) {
var def = $q.defer();
var self = this;
var access_token = timeStorage.get('google_access_token');
if (access_token) {
$log.info('Direct Access Token :' + access_token);
service.getUserInfo(access_token, def);
} else {
var params = 'client_id=' + encodeURIComponent(options.client_id);
params += '&redirect_uri=' + encodeURIComponent(options.redirect_uri);
params += '&response_type=code';
params += '&scope=' + encodeURIComponent(options.scope);
var authUrl = 'https://accounts.google.com/o/oauth2/auth?' + params;
var win = window.open(authUrl, '_blank', 'location=no,toolbar=no,width=800, height=800');
var context = this;
if (ionic.Platform.isWebView()) {
console.log('using in app browser');
win.addEventListener('loadstart', function (data) {
console.log('load start');
if (data.url.indexOf(context.redirect_url) === 0) {
console.log('redirect url found ' + context.redirect_url);
console.log('window url found ' + data.url);
win.close();
var url = data.url;
var access_code = context.gulp(url, 'code');
if (access_code) {
context.validateToken(access_code, def);
} else {
def.reject({error: 'Access Code Not Found'});
}
}
});
} else {
console.log('InAppBrowser not found11');
var pollTimer = $interval(function() {
try {
console.log("google window url " + win.document.URL);
if (win.document.URL.indexOf(context.redirect_url) === 0) {
console.log('redirect url found');
win.close();
$interval.cancel(pollTimer);
pollTimer = false;
var url = win.document.URL;
$log.debug('Final URL ' + url);
var access_code = context.gulp(url, 'code');
if (access_code) {
$log.info('Access Code: ' + access_code);
context.validateToken(access_code, def);
} else {
def.reject({error: 'Access Code Not Found'});
}
}
} catch (e) {
}
}, 100);
}
}
return def.promise;
};
service.validateToken = function (token, def) {
$log.info('Code: ' + token);
var http = $http({
url: 'https://www.googleapis.com/oauth2/v3/token',
method: 'POST',
headers: {'Content-Type': 'application/x-www-form-urlencoded'},
params: {
code: token,
client_id: this.client_id,
client_secret: this.secret,
redirect_uri: this.redirect_url,
grant_type: 'authorization_code',
scope: ''
}
});
var context = this;
http.then(function (data) {
$log.debug(data);
var access_token = data.data.access_token;
var expires_in = data.data.expires_in;
expires_in = expires_in * 1/(60 * 60);
timeStorage.set('google_access_token', access_token, expires_in);
if (access_token) {
$log.info('Access Token :' + access_token);
context.getUserInfo(access_token, def);
} else {
def.reject({error: 'Access Token Not Found'});
}
});
};
service.getUserInfo = function (access_token, def) {
var http = $http({
url: 'https://www.googleapis.com/oauth2/v3/userinfo',
method: 'GET',
params: {
access_token: access_token
}
});
http.then(function (data) {
$log.debug(data);
var user_data = data.data;
var user = {
name: user_data.name,
gender: user_data.gender,
email: user_data.email,
google_id: user_data.sub,
picture: user_data.picture,
profile: user_data.profile
};
def.resolve(user);
});
};
service.getUserFriends = function() {
var access_token = this.access_token;
var http = $http({
url: 'https://www.googleapis.com/plus/v1/people/me/people/visible',
method: 'GET',
params: {
access_token: access_token
}
});
http.then(function (data) {
console.log(data);
});
};
service.startLogin = function() {
var def = $q.defer();
var promise = this.authorize({
client_id: this.client_id,
client_secret: this.secret,
redirect_uri: this.redirect_url,
scope: this.scope
});
promise.then(function (data) {
def.resolve(data);
}, function (data) {
$log.error(data);
def.reject(data.error);
});
return def.promise;
};
return service;
}
]);