golang为LigerUI编写简易版本web服务器

package main

import (
    "io/ioutil"
    "log"
    "net/http"
    "os"
)

var zpath string = "D:/Download/jQuery LigerUI V1.3.2/Source/" //LigerUI安装路径
var zport string = ""
var zsource_file = "source.config"
var zport_file = "port.config"
var staticHandler http.Handler

func Init() {

    if sourceExist(zport_file) {
        log.Println("Port file is " + zport_file)
        ztemp_port := filetostr(zport_file)
        if ztemp_port != "" {
            zport = ztemp_port
        }
    } else {
        log.Println("Port file not exist ,please set server port in file " + zport_file)
        log.Println("Server will use default port 80")
    }

    if sourceExist(zsource_file) {
        log.Println("Config file is " + zsource_file)
        ztemp_path := filetostr(zsource_file)
        if ztemp_path != "" {
            zpath = ztemp_path
        }
    } else {
        log.Println("Source file not exist ,please set LigerUI source path in file " + zsource_file)
        log.Println("Server will use default LigerUI path")
    }
    staticHandler = http.FileServer(http.Dir(zpath))
}

func indexPage(w http.ResponseWriter, req *http.Request) {
    log.Println(req.URL.Path)
    if req.URL.Path != "/" {
        staticHandler.ServeHTTP(w, req)
        return
    }
    //处理主页127.0.0.1
    req.URL.Path = "/index.htm"
    staticHandler.ServeHTTP(w, req)
}

func main() {
    Init()

    log.Println("LigerUI Source Path:")
    log.Println(zpath)

    zport_str := ""
    if zport != "" {
        zport_str = ":" + zport
    }
    log.Println("Start LigerUI Server " + "127.0.0.1" + zport_str)

    http.HandleFunc("/", indexPage)

    err := http.ListenAndServe(":"+zport, nil)
    if err != nil {
        log.Fatal("ListenAndServe: ", err)
    }

}

func sourceExist(filename string) bool {
    _, err := os.Stat(filename)
    return err == nil || os.IsExist(err)
}

func filetostr(zfilename string) string {
    zbyte, err := ioutil.ReadFile(zfilename)
    zstr := ""
    if err == nil {
        zstr = string(zbyte)

    }
    return zstr
}