getting response from external API calls in Azure Functions Code in Node.js

Question

For several days I am struggling in getting Azure Function in Node.js to work with external API. I tried different combinations and libraries like Axios or https, using.then as well as Async Await patterns and in every time during the execution I am getting only Promises in return. I suppose the function gets executed, but I am loosing its context in the main function. Even executing this simple example:

module.exports = async function (context, req) {
context.log('Before the call');
let request_options = {
        method: 'GET',
        host: 'https://jsonplaceholder.typicode.com',
        path: '/todos/1',
        headers: {
            'Content-Type': 'application/json'
        }
};
require('http')
    .request(
         request_options,
         function (res,context) {
               context.log(res);
               context.log('I am within response');
         });
context.log('After the call');
};

Results with:

2019-11-07T13:19:16.169 [Information] Executing 'Functions.Asyncawaittest' (Reason='This function was programmatically called via the host APIs.', Id=769ceae0-257f-432c-af8f-e35504ebc79a)
2019-11-07T13:19:20.880 [Information] Before the call
2019-11-07T13:19:20.881 [Information] After the call

Which indicates that a response is not handled by the context.log context. What am I missing to be able to debug the code within the response? Is it at all executed? I will have some nested API calls to deal with so it will get more complex to debug.

Do you get a response if you go to https://jsonplaceholder.typicode.com/todos/1 in your browser? — Rob Johansen
– Rob Johansen, Commented Nov 7, 2019 at 14:24
Actually in the mean time I set up my own API endpoint with node-red and ngrok to make it public and found out it fires in that direction. Then I found another related issue here on Stackoverflow on mixing promises with callbacks. So I dropped "async" from the model.exports function declaration and it works now and debugs to logs perfectly. thanks. — MatnikR
– MatnikR, Commented Nov 8, 2019 at 10:32

MatnikR · Accepted Answer · 2019-11-16 20:44:38Z

1

Actually in the mean time I set up my own API endpoint with node-red and ngrok to make it public and found out it fires in that direction. Then I found another related issue here on Stackoverflow on mixing promises with callbacks. So I dropped "async" from the model.exports function declaration and it works now and debugs to logs perfectly. thanks.

answered Nov 16, 2019 at 20:44

MatnikR

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