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google.js
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google.js
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// See discussion here for example https://github.com/martijnwalraven/meteor-ios/issues/10
// would call from a remote client like so
// ddpClient.call("login", [{ google: { RES_FROM_GOOGLE_SIGN_IN } }])
Accounts.registerLoginHandler('google', function(serviceData) {
let loginRequest = serviceData['google'];
if (!loginRequest) {
return undefined;
}
const serviceConfig = ServiceConfiguration.configurations.findOne({service: 'google'});
if (!serviceConfig)
throw new ServiceConfiguration.ConfigError();
const expiresAt = (+new Date) + (1000 * parseInt(loginRequest.accessTokenExpirationDate, 10));
const accessToken = loginRequest.accessToken;
const idToken = loginRequest.idToken;
if (!idToken) {
throw new Meteor.Error(401, 'Google login without idToken')
}
let validToken = validIdToken(idToken, serviceConfig);
if (!validToken) {
throw new Meteor.Error(500, 'Failed to link Google', accessToken)
}
const scopes = getScopes(accessToken);
const identity = getIdentity(accessToken);
serviceData = {
accessToken: accessToken,
expiresAt: expiresAt,
idToken: idToken,
scope: scopes,
}
const fields = _.pick(identity, Google.whitelistedFields);
_.extend(serviceData, fields);
if (loginRequest.serverAuthCode) {
let authCodes = exchangeAuthCode(loginRequest.serverAuthCode, serviceConfig);
if (authCodes) {
serviceData.accessToken = authCodes.access_token;
serviceData.expiresAt = (+new Date) + (1000 * parseInt(authCodes.expires_in, 10));
serviceData.idToken = authCodes.id_token;
if (authCodes.refresh_token)
serviceData.refreshToken = authCodes.refresh_token;
}
}
const existingUser = Meteor.users.findOne({ 'services.google.id': validToken.sub });
let userId;
if (existingUser) {
userId = existingUser._id;
let prefixedServiceData = {};
_.each(serviceData, (val, key) => {
prefixedServiceData[`services.google.${key}`] = val;
});
Meteor.users.update({ _id: userId }, {
$set: prefixedServiceData,
$addToSet: { emails: { address: serviceData.email, verified: serviceData.verified_email } }
});
} else {
userId = Meteor.users.insert({
services: {
google: serviceData
},
profile: { name: serviceData.name },
emails: [{
address: serviceData.email,
verified: serviceData.verified_email
}]
});
}
return { userId: userId };
});
// https://developers.google.com/identity/sign-in/ios/backend-auth
const validIdToken = (idToken, config) => {
try {
let res = HTTP.get(
"https://www.googleapis.com/oauth2/v3/tokeninfo",
{params: {id_token: idToken}});
if (res && res.statusCode === 200) {
if (_.contains(config.validClientIds, res.data.aud)) {
return res.data;
} else {
return null;
}
} else {
return null;
}
} catch (err) {
console.log('err', err);
return null;
}
};
const getIdentity = (accessToken) => {
try {
return HTTP.get(
"https://www.googleapis.com/oauth2/v1/userinfo",
{params: {access_token: accessToken}}).data;
} catch (err) {
throw _.extend(new Error("Failed to fetch identity from Google. " + err.message),
{response: err.response});
}
};
const getScopes = (accessToken) => {
try {
return HTTP.get(
"https://www.googleapis.com/oauth2/v1/tokeninfo",
{params: {access_token: accessToken}}).data.scope.split(' ');
} catch (err) {
throw _.extend(new Error("Failed to fetch tokeninfo from Google. " + err.message),
{response: err.response});
}
};
const exchangeAuthCode = (authCode, config) => {
let response;
try {
response = HTTP.post(
"https://www.googleapis.com/oauth2/v4/token", {params: {
code: authCode,
client_id: config.clientId,
client_secret: OAuth.openSecret(config.secret),
grant_type: 'authorization_code'
}});
} catch (err) {
// throw _.extend(new Error("Failed to exchange Google auth code for refresh token. " + err.message),
// {response: err.response});
return null;
}
return response.data;
}