42 lines
996 B
Go
42 lines
996 B
Go
package middlewares
|
|
|
|
import (
|
|
"context"
|
|
"net"
|
|
"net/http"
|
|
"strings"
|
|
|
|
"github.com/containous/traefik/types"
|
|
)
|
|
|
|
var requestHostKey struct{}
|
|
|
|
// RequestHost is the struct for the middleware that adds the CanonicalDomain of the request Host into a context for later use.
|
|
type RequestHost struct{}
|
|
|
|
func (rh *RequestHost) ServeHTTP(rw http.ResponseWriter, r *http.Request, next http.HandlerFunc) {
|
|
if next != nil {
|
|
host := types.CanonicalDomain(parseHost(r.Host))
|
|
next.ServeHTTP(rw, r.WithContext(context.WithValue(r.Context(), requestHostKey, host)))
|
|
}
|
|
}
|
|
|
|
func parseHost(addr string) string {
|
|
if !strings.Contains(addr, ":") {
|
|
return addr
|
|
}
|
|
|
|
host, _, err := net.SplitHostPort(addr)
|
|
if err != nil {
|
|
return addr
|
|
}
|
|
return host
|
|
}
|
|
|
|
// GetCanonizedHost plucks the canonized host key from the request of a context that was put through the middleware
|
|
func GetCanonizedHost(ctx context.Context) string {
|
|
if val, ok := ctx.Value(requestHostKey).(string); ok {
|
|
return val
|
|
}
|
|
return ""
|
|
}
|