如何在http.Request中获取URL

时间:2014-04-18 10:04:21

标签: go

我构建了一个HTTP服务器。我使用下面的代码来获取请求URL,但它没有获得完整的URL。

func Handler(w http.ResponseWriter, r *http.Request) {  
    fmt.Printf("Req: %s %s", r.URL.Host, r.URL.Path)
}

我只获得"Req: / ""Req: /favicon.ico"

我希望将完整的客户请求网址设为"1.2.3.4/""1.2.3.4/favicon.ico"

感谢。

3 个答案:

答案 0 :(得分:27)

来自net / http包的文档:

type Request struct {
   ...
   // The host on which the URL is sought.
   // Per RFC 2616, this is either the value of the Host: header
   // or the host name given in the URL itself.
   // It may be of the form "host:port".
   Host string
   ...
}

修改后的代码版本:

func Handler(w http.ResponseWriter, r *http.Request) {
    fmt.Printf("Req: %s %s\n", r.Host, r.URL.Path) 
}

示例输出:

Req: localhost:8888 /

答案 1 :(得分:8)

我使用req.URL.RequestURI()获取完整的网址。

来自net/http/requests.go

// RequestURI is the unmodified Request-URI of the
// Request-Line (RFC 2616, Section 5.1) as sent by the client
// to a server. Usually the URL field should be used instead.
// It is an error to set this field in an HTTP client request.
RequestURI string

答案 2 :(得分:3)

如果您检测到您正在处理相对网址(r.URL.IsAbs() == false),则您可以访问r.Hostsee http.Request),Host本身。

连接这两个将为您提供完整的URL。

通常,您会看到相反的情况(从网址中提取主机),如gorilla/reverse/matchers.go

// getHost tries its best to return the request host.
func getHost(r *http.Request) string {
    if r.URL.IsAbs() {
        host := r.Host
        // Slice off any port information.
        if i := strings.Index(host, ":"); i != -1 {
            host = host[:i]
        }
        return host
    }
    return r.URL.Host
}