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Python flask跨域支持（Access-Control-Allow-Origin（CORS ）跨域资源共享（访问控制允许来源：允许指定的来源进行跨域请求）浏览器同源策略、OPTIONS预检请求_flask cors-CSDN博客
Definitive guide to solve CORS error, Access-Control-Allow-Origin in Python Flask APIs - YouTube
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