flask手动CORS(跨来源资源共享)解决跨域

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@app.route("xxxxxx", methods=['POST', 'OPTIONS']) def case_desc_post():     """     提交案例基本信息     :return:     """     print(1111)     if request.method in ('OPTIONS',):         return API.resp({}, header={"Access-Control-Allow-Origin": "http://localhost:63342",                                       "Access-Control-Allow-Methods": "DELETE, GET, HEAD, OPTIONS, PATCH, POST, PUT",                                       "Access-Control-Allow-Headers": "content-type"})     if request.method in ('POST'):         req = request.json         data = SubCase().db_desc_post(req)         return API.resp(data, header={"Access-Control-Allow-Origin": "http://localhost:63342",                                       "Access-Control-Allow-Methods": "DELETE, GET, HEAD, OPTIONS, PATCH, POST, PUT",                                       "Access-Control-Allow-Headers": "content-type"})

　　通常可以用flask_cors模块实现