You cannot set custom HTTP headers, but the required ones will be generated for you automatically (such as content-lenth).
您不能设置自定义的HTTPheader，被请求的响应会自动帮您生成相应的header(比如content - lenth)。
You cannot set custom HTTP headers, but the required ones will be generated for you automatically (such as content-lenth).
您不能设置自定义的HTTPheader，被请求的响应会自动帮您生成相应的header(比如content - lenth)。
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