Hi Ray,
As mentioned by Tiago, you will be better assisted on StackOverflow 
<https://stackoverflow.com/questions/tagged/google-app-engine> as Google 
Groups are more oriented towards general opinions, trends, and issues of 
general nature touching App Engine.

On Thursday, August 15, 2019 at 3:35:12 AM UTC-4, Ray Wong wrote:
> Thanks for your reply! The previous way to get data using AngularJS $http. 
> Some code is like this:
> dashboard_app.factory('DashboardDataFetching', function($location, $http) {
>   return {
>     'GetArticleProgress': function(article_urlsafe, call_back) {
>       $http.post("/_api/get_progress", JSON.stringify({
>         'article_urlsafe': article_urlsafe
>       })).then(call_back);
>     },
>   }
> });
> The key issue is that without using JavaScript client library(
> https://apis.google.com/js/client.js), I can't get the call_back. That is 
> to say, I can't access the url successfully without it while others have no 
> problem. Is there any way to slove this please?  
> 在 2019年8月14日星期三 UTC+8上午9:50:14,Tiago (Google Cloud Platform Support)写道:
>> Thank you for using Google Groups!
>> Passing data between a backend and frontend service differs depending on 
>> the language and/or framework you are using. Should you be adopting a 
>> RESTful backend architecture in Python such as Flask, you can define a 
>> route handler, hit it with a GET request using the Fetch API 
>> <https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Fetch> 
>> from JavaScript, and then have the data returned using the response object 
>> in your 'main.py' file.
>> You can follow this tutorial 
>> <https://flask.palletsprojects.com/en/1.1.x/tutorial/> on how to write 
>> route handlers using Flask that you can then hit using the Fetch API 
>> <https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Fetch> 
>> from JavaScript, and have data returned from the backend service to the 
>> frontend service. 
>> Furthermore, you can use the GCP Flask tutorial 
>> <https://github.com/GoogleCloudPlatform/python-docs-samples/tree/master/appengine/standard/flask/tutorial>
>>  to 
>> get you started.
>> Finally, these types of questions are better addressed on StackOverflow 
>> where you have access to a large community of enthusiasts and experts to 
>> share ideas with and get support from. Please make sure to include all 
>> relevant details and error messages which would help the community 
>> troubleshoot.
>> On Monday, August 12, 2019 at 2:22:09 PM UTC-4, Ray Wong wrote:
>>> At present I deploy my gae project on appscale. I want to  pass data to 
>>> html page. I know a simple way is to use Google JavaScript Library. But for 
>>> some reason, the https://apis.google.com/js/client.js is blocked and I 
>>> can't use this library.  So I want to ask are there other ways to get  
>>> backend data(written in python) for javascript page. Thanks!  

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