这是请求头部信息
Connection: keep-alive
Accept: /
User-Agent: Mozilla/5.0 (iPhone; CPU iPhone OS 10_3_3 like Mac OS X) AppleWebKit/603.3.8 (KHTML, like Gecko) Mobile/14G60 MicroMessenger/6.6.1 NetType/4G Language/zh_CN
Accept-Language: zh-cn
Accept-Encoding: gzip, deflate
这是回的头部信息
112.5.240.8.59115: Flags [.], seq 1:2921, ack 443, win 60, length 2920: HTTP: HTTP/1.1 200 OK
E…j@.@…Ep…P…'d.:…^P…<…HTTP/1.1 200 OK
Server: nginx
Date: Sat, 03 Feb 2018 09:38:30 GMT
Content-Type: audio/mpeg
Content-Length: 193538
Last-Modified: Sat, 03 Feb 2018 09:32:17 GMT
Connection: keep-alive
ETag: “5a7581a1-2f402”
Expires: Mon, 05 Mar 2018 09:38:30 GMT
Cache-Control: max-age=2592000
Accept-Ranges: bytes
http 服务器用tcpdump 查看的 http头部信息是正常的，并且服务器返回的是200， 但是客户端无法加载出来，只有在4G网络下会这样， wifi环境下是正常的。