使用nc和curl模拟http服务器和客户端
服务器端
使用nc监听本地端口，可以事先用curl访问一下百度，将返回的报文放在baidu_return_data文件里面
➜ nc_cmd nc -l 80 < baidu_return_data
客户端
- 使用curl访问
➜ ~ curl http://127.0.0.1 -v
* Rebuilt URL to: http://127.0.0.1/
* Trying 127.0.0.1...
* TCP_NODELAY set
* Connected to 127.0.0.1 (127.0.0.1) port 80 (#0)
> GET / HTTP/1.1
> Host: 127.0.0.1
> User-Agent: curl/7.54.0
> Accept: */*
>
< HTTP/1.1 200 OK
< Accept-Ranges: bytes
< Cache-Control: private, no-cache, no-store, proxy-revalidate, no-transform
< Connection: Keep-Alive
< Content-Length: 2381
< Content-Type: text/html
< Date: Sun, 23 Dec 2018 04:48:30 GMT
< Etag: "588604dc-94d"
< Last-Modified: Mon, 23 Jan 2017 13:27:56 GMT
< Pragma: no-cache
< Server: bfe/1.0.8.18
< Set-Cookie: BDORZ=27315; max-age=86400; domain=.baidu.com; path=/
<
<!DOCTYPE html>
<!--STATUS OK--><html> <head><meta http-equiv=content-type content=text/html;charset=utf-8><meta http-equiv=X-UA-Compatible content=IE=Edge><meta content=always name=referrer><link rel=stylesheet type=text/css href=http://s1.bdstatic.com/r/www/cache/bdorz/baidu.min.css><title>百度一下，你就知道</title></head> <body link=#0000cc> 
