add login with qq, wechat and weibo (#3069)

* add login with qq, wechat and weibo

* modify the code style, etc

src/authDataManager/weibo.js

@@ -0,0 +1,60 @@
+// Helper functions for accessing the weibo Graph API.
+var https = require('https');
+var Parse = require('parse/node').Parse;
+var querystring = require('querystring');
+
+// Returns a promise that fulfills iff this user id is valid.
+function validateAuthData(authData) {
+  return graphRequest(authData.access_token).then(function (data) {
+    if (data && data.uid == authData.id) {
+      return;
+    }
+    throw new Parse.Error(Parse.Error.OBJECT_NOT_FOUND, 'weibo auth is invalid for this user.');
+  });
+}
+
+// Returns a promise that fulfills if this app id is valid.
+function validateAppId(appIds, authData) {
+  return Promise.resolve();
+}
+
+// A promisey wrapper for weibo graph requests.
+function graphRequest(access_token) {
+  return new Promise(function (resolve, reject) {
+    var postData = querystring.stringify({
+      "access_token":access_token
+    });
+    var options = {
+      hostname: 'api.weibo.com',
+      path: '/oauth2/get_token_info',
+      method: 'POST',
+      headers: {
+        'Content-Type': 'application/x-www-form-urlencoded',
+        'Content-Length': Buffer.byteLength(postData)
+      }
+    };
+    var req = https.request(options, function(res){
+      var data = '';
+      res.on('data', function (chunk) {
+        data += chunk;
+      });
+      res.on('end', function () {
+        data = JSON.parse(data);
+        resolve(data);
+      });
+      res.on('error', function (err) {
+        reject('Failed to validate this access token with weibo.');
+      });
+    });
+    req.on('error', function (e){
+      reject('Failed to validate this access token with weibo.');
+    });
+    req.write(postData);
+    req.end();
+  });
+}
+
+module.exports = {
+  validateAppId,
+  validateAuthData
+};