Fix preview of images in mobile

lib/fileUpload.coffee

@@ -73,6 +73,10 @@ if UploadFS?
 					uid = cookie.get('rc_uid', rawCookies) if rawCookies?
 					token = cookie.get('rc_token', rawCookies) if rawCookies?
 
+					if not uid?
+						uid = req.query.rc_uid
+						token = req.query.rc_token
+
 					unless uid and token and RocketChat.models.Users.findOneByIdAndLoginToken(uid, token)
 						res.writeHead 403
 						return false

packages/rocketchat-message-attachments/client/messageAttachment.coffee

@@ -1,7 +1,13 @@
 Template.messageAttachment.helpers
 	fixCordova: (url) ->
 		if Meteor.isCordova and url?[0] is '/'
-			return Meteor.absoluteUrl().replace(/\/$/, '') + url
+			url = Meteor.absoluteUrl().replace(/\/$/, '') + url
+			query = "rc_uid=#{Meteor.userId()}&rc_token=#{Meteor._localStorage.getItem('Meteor.loginToken')}"
+			if url.indexOf('?') is -1
+				url = url + '?' + query
+			else
+				url = url + '&' + query
+
 		return url
 
 	showImage: ->