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# X-Forwarded-For middleware fo Go [](https://godoc.org/github.com/sebest/xff) [](https://travis-ci.org/sebest/xff)
Package `xff` is a `net/http` middleware/handler to parse [Forwarded HTTP Extension](http://tools.ietf.org/html/rfc7239) in Golang.
## Example usage
Install `xff`:
go get github.com/sebest/xff
Edit `server.go`:
```go
package main
import (
"net/http"
"github.com/sebest/xff"
)
func main() {
handler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.Write([]byte("hello from " + r.RemoteAddr + "\n"))
})
xffmw, _ := xff.Default()
http.ListenAndServe(":8080", xffmw.Handler(handler))
}
```
Then run your server:
go run server.go
The server now runs on `localhost:8080`:
$ curl -D - -H 'X-Forwarded-For: 42.42.42.42' http://localhost:8080/
HTTP/1.1 200 OK
Date: Fri, 20 Feb 2015 20:03:02 GMT
Content-Length: 29
Content-Type: text/plain; charset=utf-8
hello from 42.42.42.42:52661
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