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Flask Application Error: Cors Origin Error
I'm encountering an issue with my Flask application where I'm unable to retrieve a response. When I entered the URL provided by sam deploy --guided after building it using sam build to get the page displayed on the browser, the page displays the user-entered message appropriately. However, there is no response. I get the following error:
Sam-cli commands:
sam build
sam deploy --guided
sam remote invoke
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Even after mentioning following header on enabling CORS I am getting this why I am not getting that. I am able to send response but not getting it back. When I select option from method section CORS header applied Sucessfully for Get method it always failed.
I am not sure about this answer, but did you also select the OPTIONS side? The preflight request is made for OPTIONS in CORS communication. If there are no OPTIONS, OPTIONS should be set automatically, but since there are already OPTIONS, it may not be possible to set them, and an error may occur.
If you can share the details of the error, we can get some more ideas.
FYI
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It looks like you have successfully configured API Gateway.
As for the problem of CORS communication continuously failing, please open the Network tab of the Developer Tools and check how the request is going. Are you getting a 200 response to OPTIONS?