How To Fix From Origin 'http://localhost:4200' Has Been Blocked By CORS Policy: The 'Access-Control-Allow-Origin' Header Has A Code Example


Example 1: origin 'http://localhost:4200' has been blocked by CORS policy

'Content-Type': 'application/json',       'Access-Control-Allow-Origin': '*',       'Access-Control-Allow-Headers': 'Content-Type',       'Access-Control-Allow-Methods': 'GET,POST,OPTIONS,DELETE,PUT',       'Authorization': 'Bearer key',

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

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