The BASH below is not specific to Flask, but the MySQL probably is.
Send to this URL to see just what you have actually sent to help any debugging.
curl -i -X POST \ -H 'Content-Type: application/json' \ -d "{\"auth_token\":\"${AUTH_TOKEN}\", \"user_id\":\"${EMAIL}\", \"file_ref\":\"File.odt\", \"uuid\":\"${UUID}\"}" \ http://192.168.11.7:5000/api
Get output from MySQL in the form of a Tuple and return it without any html encoding, ie. just as a json object. It has a 200 hard coded, but it might be wise to check that the result from MySQL is sensible and justifies a 200 return.
mycursor = mydb.cursor() mycursor.execute(sql) user_id = mycursor.fetchone() # returns a tuple lookup_userid = {"userid":user_id[0]} response = make_response(jsonify({"id": str(lookup_userid) }), 200,) response.headers["Content-Type"] = "application/json" return response