Access to XMLHttpRequest at http://127.0.0.1:5500' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. code example
Example 1: been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource.
My issue was the remote server not responding to OPTIONS requests,
so after fiddling about with requests and headers for what seemed
like ages I resolved it by removing the headers
Content-Type and Access-Control-Allow-Origin
Example 2: ccess to XMLHttpRequest at 'http://127.0.0.1:5000/ has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.
@app.route('your route', methods=['GET'])
def yourMethod(params):
response = flask.jsonify({'some': 'data'})
response.headers.add('Access-Control-Allow-Origin', '*')
return response