Go's net/http package deals with HTTP client and server implementations. Here, we are mainly interested in the server implementation. Let us create a small Go program called basicHandler.go that defines the route and a function handler:
package main
import (
"io"
"net/http"
"log"
)
// hello world, the web server
func MyServer(w http.ResponseWriter, req *http.Request) {
io.WriteString(w, "hello, world!\n")
}
func main() {
http.HandleFunc("/hello", MyServer)
log.Fatal(http.ListenAndServe(":8000", nil))
}This code does the following things:
- Create a route called
/hello. - Create a handler called
MyServer. - Whenever the request comes on the route (
/hello), the handler function will be executed. - Write
hello, worldto the response. - Start the server on port
8000.ListenAndServereturnserrorif something goes wrong. So log it usinglog.Fatal. - The
httppackage has a function calledHandleFunc, using which we can map an URL to a function.
- Here,...