golang实现http服务器处理静态文件示例

package main
import (
    "flag"
    "log"
    "net/http"
    "os"
    "io"
    "path"
    "strconv"
)
var dir string
var port int
var staticHandler http.Handler
// 初始化参数
func init() {
    dir = path.Dir(os.Args[0])
    flag.IntVar(&port,"port",80,"服务器端口")
    flag.Parse()
    staticHandler = http.FileServer(http.Dir(dir))
}
func main() {
    http.HandleFunc("/",StaticServer)
    err := http.ListenAndServe(":"+strconv.Itoa(port),nil)
    if err != nil {
        log.Fatal("ListenAndServe: ",err)
    }
}
// 静态文件处理
func StaticServer(w http.ResponseWriter,req *http.Request) {
    if req.URL.Path != "/" {
        staticHandler.ServeHTTP(w,req)
        return
    }
    io.WriteString(w,"hello,world!n")
}

package main
import (
    "flag"
    "log"
    "net/http"
    "os"
    "path"
    "strconv"
)
var dir string
var port int
var indexs []string
// 初始化参数
func init() {
    dir = path.Dir(os.Args[0])
    flag.IntVar(&port,"服务器端口")
    flag.Parse()
    indexs = []string{"index.html","index.htm"}
}
func main() {
    http.HandleFunc("/",req *http.Request) {
    file := dir + req.URL.Path
    fi,err := os.Stat(file)
    if os.IsNotExist(err) {
        http.NotFound(w,req)
        return
    }
    if err != nil {
        http.Error(w,err.Error(),500)
        return
    }
    if fi.IsDir() {
        if req.URL.Path[len(req.URL.Path)-1] != '/' {
            http.Redirect(w,req,req.URL.Path+"/",301)
            return
        }
        for _,index := range indexs {
            fi,err = os.Stat(file + index)
            if err != nil {
                continue
            }
            http.ServeFile(w,file+index)
            return
        }
        http.NotFound(w,req)
        return
    }
    http.ServeFile(w,file)
}