Geeting CORS in API while calling inside Teams APP TAB

Question

Getting CORS in API while calling inside Teams APP TAB Calling API in Teams App TABconst u = `${domain}/api/login.json`;

fetch(u, requestOptions)
    .then(resp =&gt; {
  }While calling API we are getting CORS&nbsp;&nbsp;Despite receiving correct responses in the network tab, the app is receiving different responses, possibly due to the restricted Teams SDK..&nbsp;&nbsp;&nbsp;&nbsp;

prasad_das-msft · Answer

ankur745&nbsp;- Could you please check this thread and let us know if it helps?

ankur745 · Answer

Prasad_Das-MSFT&nbsp;No, it's not helpful. I'm receiving data from my server API but Teams SDK not passed that data to me... in code getting type = CORS issue..looks like Teams SDK restricting data . I have attached two screenshots to my question.Is the team's app tab allowing to call 3rd Party API?

ankur745 · Answer

Hey basically I want to call 3rd party API.. so how i can simply call API?

prasad_das-msft · Answer

ankur745&nbsp;- We are checking this with engineering team. We will inform you once we hear anything from them. Thanks!

prasad_das-msft · Answer

ankur745&nbsp;-&nbsp;
Teams Platform/SDK doesn't do anything to interfere with AJAX requests made by apps. CORS is standard mechanism implemented by all browsers that limits cross-origin network calls. If an app is trying to make a cross-origin network request, then the backend API must allow it first by responding correctly to the OPTIONS call. Here is an example:

&nbsp;
&nbsp;
There is documentation on CORS here:
https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS
&nbsp;
Could you please provide us Fiddler trace of the request, so that we will be able to point out what the exact issue is?

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Geeting CORS in API while calling inside Teams APP TAB

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