go语言不是跨平台的吗，我的这段代码怎么不能运行？

Question

package mainimport (    "fmt"    _"log"    "io"    "io/ioutil"    _"net"    _"strings"    "net/http"    _"net/url")func main() {    http80()}func http80() {    http.HandleFunc("/",handle80)    http.ListenAndServe("0.0.0.0:80", nil)}func handle80(w http.ResponseWriter, req *http.Request) {    proxyReq, _ := http.NewRequest("GET", "http://www.oschina.net", req.Body)    client := &http.Client{}    response, errorMsg := client.Do(proxyReq)    if errorMsg != nil {        fmt.Println(errorMsg)        return    }    defer response.Body.Close()    var newBody string = ""    buffer, _ := ioutil.ReadAll(response.Body)    newBody = string(buffer)    io.WriteString(w, newBody)}这个在ubuntu14.04上可以运行的，可是在centos5.5 Linux localhost.localdomain 2.6.18-194.el5 #1 SMP Fri Apr 2 14:58:35 EDT 2010 i686 i686 i386 GNU/Linux这样的设备上编译后运行也没报错，就是没反应

Answer 1

Linux绑定80端口是需要权限的，也许是不同环境的权限不一样