CODEWITHSUNDEEP
go
Jerry YY Rain
Jerry YY Rain

Reputation: 4382

How to get URL in http.Request

I built an HTTP server. I am using the code below to get the request URL, but it does not get full URL. 

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

I only get "Req: / " and "Req: /favicon.ico".

I want to get full client request URL as "1.2.3.4/" or "1.2.3.4/favicon.ico".

Thanks.

Upvotes: 52

Views: 123455

Answers (3)

mraron
mraron

Reputation: 2551

From the documentation of net/http package:

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
   ...
}

Modified version of your code:

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

Example output:

Req: localhost:8888 /

Upvotes: 71

Mithril
Mithril

Reputation: 13718

I use req.URL.RequestURI() to get the full url.

From 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

Upvotes: 21

VonC
VonC

Reputation: 1323343

If you detect that you are dealing with a relative URL (r.URL.IsAbs() == false), you sill have access to r.Host (see http.Request), the Host itself.

Concatenating the two would give you the full URL.

Generally, you see the reverse (extracting Host from an URL), as in 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
}

Upvotes: 10

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