关于Go语言在服务端做Restful接口和socket通信

关于Go语言在服务端做Restful接口和socket通信

已经转到: 

http://xiaorui.cc/2014/10/25/%E5%85%B3%E4%BA%8Ego%E8%AF%AD%E8%A8%80%E5%9C%A8%E6%9C%8D%E5%8A%A1%E7%AB%AF%E5%81%9Arestful%E6%8E%A5%E5%8F%A3%E5%92%8Csocket%E9%80%9A%E4%BF%A1/

下图即是REST的架构图：

当REST架构的约束条件作为一个整体应用时，将生成一个可以扩展到大量客户端的应用程序。它还降低了客户端和服务器之间的交互延迟。统一界面简化了整个系统架构，改进了子系统之间交互的可见性。REST简化了客户端和服务器的实现，而且对于使用REST开发的应用程序更加容易扩展。

其实说白了，就是根据不同的方法，来分类不同的任务~

package main
import (
    "fmt"
    "github.com/drone/routes"
    "net/http"
)
func getuser(w http.ResponseWriter, r *http.Request) {
    params := r.URL.Query()
    uid := params.Get(":uid")
    fmt.Fprintf(w, "you are get user %s", uid)
}
func modifyuser(w http.ResponseWriter, r *http.Request) {
    params := r.URL.Query()
    uid := params.Get(":uid")
    fmt.Fprintf(w, "you are modify user %s", uid)
}
func deleteuser(w http.ResponseWriter, r *http.Request) {
    params := r.URL.Query()
    uid := params.Get(":uid")
    fmt.Fprintf(w, "you are delete user %s", uid)
}
func adduser(w http.ResponseWriter, r *http.Request) {
    params := r.URL.Query()
    uid := params.Get(":uid")
    fmt.Fprint(w, "you are add user %s", uid)
    fmt.Printf("you are add user %s", uid)
}
//xiaorui.cc
func main() {
    mux := routes.New()
    mux.Get("/user/:uid", getuser)
    mux.Post("/user/:uid", modifyuser)
    mux.Del("/user/:uid", deleteuser)
    mux.Put("/user/:uid", adduser)
    http.Handle("/", mux)
    http.ListenAndServe(":8088", nil)
}
//xiaorui.cc

结果：

接着咱们再说下 go的socket 。

客户端的情况

服务端的情况：

server.go

package main
import (
    "fmt"
    "net"
    "os"
)
func main() {
    var (
        host   = "127.0.0.1"
        port   = "8080"
        remote = host + ":" + port
        data   = make([]byte, 1024)
    )
    fmt.Println("Initiating server... (Ctrl-C to stop)")
    lis, err := net.Listen("tcp", remote)
    defer lis.Close()
    if err != nil {
        fmt.Println("Error when listen: ", remote)
        os.Exit(-1)
    }
    for {
        var res string
        conn, err := lis.Accept()
        if err != nil {
            fmt.Println("Error accepting client: ", err.Error())
            os.Exit(0)
        }
        go func(con net.Conn) {
            fmt.Println("New connection: ", con.RemoteAddr())
            for {
                length, err := con.Read(data)
                if err != nil {
                    fmt.Printf("Client %v quit.\n", con.RemoteAddr())
                    con.Close()
                    return
                }
                res = string(data[0:length])
                fmt.Printf("%s said: %s\n", con.RemoteAddr(), res)
                res = "You said:" + res
                con.Write([]byte(res))
            }
        }(conn)
    }
}

client.go

package main
import (
    "fmt"
    "net"
    "os"
)
var str string
var msg = make([]byte, 1024)
func main() {
    var (
        host   = "127.0.0.1"
        port   = "8080"
        remote = host + ":" + port
    )
    con, err := net.Dial("tcp", remote)
    defer con.Close()
    if err != nil {
        fmt.Println("Server not found.")
        os.Exit(-1)
    }
    fmt.Println("Connection OK.")
    for {
        fmt.Printf("Enter a sentence:")
        fmt.Scanf("%s\n", &str)
        if str == "quit" {
            fmt.Println("Communication terminated.")
            os.Exit(1)
        }
        in, err := con.Write([]byte(str))
        if err != nil {
            fmt.Printf("Error when send to server: %d\n", in)
            os.Exit(0)
        }
        length, err := con.Read(msg)
        if err != nil {
            fmt.Printf("Error when read from server.\n")
            os.Exit(0)
        }
        str = string(msg[0:length])
        fmt.Println(str)
    }
}

Go的并发模式

package main
import (
        "fmt"
        "runtime"
)
func say(s string) {
        for i := 0; i < 5; i++ {
                runtime.Gosched()
                fmt.Println(s)
        }
}
func main() {
        go say("world")
        say("end")
}

结果：