go “静态目录服务” http.FileServer

参照手册http://godoc.golangtc.com/pkg/net/http/#FileServer

里面给了Example:

http.Handle("/", http.FileServer(http.Dir("/tmp")))

这个是对目录提供静态映射服务,如果是单个文件

http.HandleFunc("/static/", func(w http.ResponseWriter, r *http.Request) {
    http.ServeFile(w, r, r.URL.Path[1:])})
})

完整例子:

import (
   "fmt"
   "log"
   "net/http"
   "os"
   "path/filepath"
)

var staticMap map[string]string = map[string]string{
   "/web/":              "../public/web",
   "/bower_components/": "../public/bower_components",
}

func InitStaticServer() {
   rootDir, err := filepath.Abs(filepath.Dir(os.Args[0]))
   if err != nil {
      log.Fatal(err)
   }
   for webPath, sysPath := range staticMap {
      sysPath, err = filepath.Abs(fmt.Sprintf("%s/%s/", rootDir, sysPath))
      if err != nil {
         log.Fatal(err)
      }
      log.Print("Serving ", webPath, " -> ", sysPath)
      http.Handle(webPath, http.StripPrefix(webPath, http.FileServer(http.Dir(sysPath))))
   }
}

package main

import (
    "fmt"
    "net/http"
)

func main() {
    http.HandleFunc("/", homeHandler)
    http.HandleFunc("/static/", func(w http.ResponseWriter, r *http.Request) {
        http.ServeFile(w, r, r.URL.Path[1:])
    })
    panic(http.ListenAndServe(":17901", nil))
}

func homeHandler(w http.ResponseWriter, r *http.Request) {
    fmt.Fprintf(w, "<html><head></head><body><h1>Welcome Home!</h1><a href=\"/static/img/test.gif\">Show Image!</a></body></html>")
}

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