Go language exercise: Network Programming TCP Example

1. Code

2. Compiling and Running

1. Network Programming TCP Example Simplehttp.go code

1 Package Main2 3 Import (4     "Net"5     "OS"6     "io"7     "bytes"8     "FMT"9 )Ten  One Func Main () { A     ifLen (OS. Args)! =2 { -Fmt. fprintf (OS. Stderr,"Usage:%s host:port", OS. args[0]) -Os. Exit (1) the     } -Service: = OS. args[1] -Conn, Err: = Net. Dial ("TCP", service) - checkerror (Err) +  -_, Err = conn. Write ([]byte("head/httpd/1.0\r\n\r\n")) + checkerror (Err) A  atresult, err: =readfully (conn) - checkerror (Err) -  -Fmt. Println (string(Result)) -  -Os. Exit (0) in } -  to func checkerror (err error) { +     ifErr! =Nil { -Fmt. fprintf (OS. Stderr,"Fatal Error:%s\n", Err. Error ()) theOs. Exit (1) *     } $ }Panax Notoginseng  -Func readfully (Conn net. Conn) ([]byte, error) { the defer Conn. Close () +  AResult: =bytes. Newbuffer (nil) the     varBUF [ +]byte +      for { -N, err: = conn. Read (buf[0:]) $Result. Write (buf[0: n]) $         ifErr! =Nil { -             ifErr = =io. EOF { -Fmt. Println ("Over ...") the                  Break -             }Wuyi             returnNil, err the         } -     } Wu  -     returnresult. Bytes (), nil About}

2. Compiling and Running

2.1) Compiling

$ go build simplehttp.go $ lssimplehttp  simplehttp.go

2.2) Run

 $./simplehttp www.xin3e.com:80  over ... HTTP /1.1  302   Founddate:mon,  20  Jul 2015  15 : 18 : 13   Gmtserver:apache /2.2 . 22   (Ubuntu) X -powered-by:php/5.3 . 10  -1ubuntu3. 19  location:web /index.phpvary:accept - Span style= "color: #000000;" >encodingconnection:closecontent -type:text/html 

Go language exercise: Network Programming TCP Example