Go build server Foundation

goweb How it works ( For personal learning )

​ The client sends a request to the multiplexer , Multiplexer on request -------> Processor processor --------> Model -------> database

The database finds the corresponding data and feeds it back to the model , The model encapsulates the data and sends it to the processor , The processor gives the template engine and generates the template

go There's a corresponding http Directly call the package of , This is better than java It's a lot more convenient , There are several ways to build a server

hanglerFunc The way

package main    // Declaration package 
 
import (      // Import package  
	"fmt"     // To print using 
	"net/http"  // http Service usage 
)
// processor 
func hangler(w http.ResponseWriter, r *http.Request) {
         // The name can be named at will   The parameters of a function cannot be named arbitrarily 
	fmt.Fprintln(w, "hello goweb", r.URL.Path)   // Write to the front page 

}

func main() {
    
	http.HandleFunc("/", hangler)     // More web principle   Add a path   Add processor   Associate the path with the processor 
	http.ListenAndServe(":8080", nil)  //  Port number  

}

Mux Multiplexing

package main

import (
	"fmt"
	"net/http"
)

func hangler(w http.ResponseWriter, r *http.Request) {
    
	fmt.Fprintln(w, "hello goweb", r.URL.Path)

}

func main() {
    
	mux := http.NewServeMux()  // Multiple servers process requests 
	http.HandleFunc("/", hangler)
	http.ListenAndServe(":8080", mux)
}

handle

package main  // Declaration package 

import (
	"fmt"     //  Print 
	"net/http"// http
	"time"
)

type Myhangdler struct{
    }  // Defining structure 

func (m *Myhangdler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
    
	fmt.Fprintln(w, " Handle request customization through the processor you create hangler")
}

func main() {
    
	myhangdler := Myhangdler{
    }    // Instantiate the connector 
	server := http.Server{
    
		Addr:        ":8080",   // Declaration port 
		Handler:     &myhangdler,  // Declare the processor 
		ReadTimeout: 2 * time.Second,  // Read time setting 
	}
	server.ListenAndServe()   //  Apply to monitoring 

	//http.Handle("/myhangler", &myhangdler)
	//http.ListenAndServe(":8080", nil)

}