feat: make HttpRequest return more accurate error #2530
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修改前:订阅请求依赖的
HttpRequest由于读写的是Pipe,如果有网络错误,经常返回EOF和io: read/write on closed pipe,对用户排除故障极其不友好。修改后:读写Pipe时可以返回创建连接/中继时产生的第一个错误。