003_go Start Httpserver

One

The HTTP service is developed in Golang and can be provided using the Net/http package. The Net/http package provides a very full functionality, and the HTTP service that is launched is also very stable and efficient , and can be used in production environments entirely.

Package Mainimport (    "FMT"    "Log" "    net/http")//W represents the Response object, the content returned to the client is processed in the object//R represents the client request object, which contains the request header, Request parameters, etc. func index (w http. Responsewriter, R *http. Request) {    //writes content to W, and the FMT is output in the browser    . fprintf (W, "Hello Golang http!")} Func Main () {    //sets the route, if access/, calls the Index method    http. Handlefunc ("/", index)    //Start Web service, listen on 9090 port    Err: = http. Listenandserve (": 8000", nil)    if err! = Nil {        log. Fatal ("Listenandserve:", Err)    }}

To run the service:

Go Run main.go

You can see the Hello Golang http! output by accessing http://localhost:8000 in the browser.