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Merge pull request #1442 from martinbaillie/master

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Pass stripped prefix downstream as header (#985)
This commit is contained in:
Timo Reimann 2017-04-17 09:07:13 +02:00 • committed by GitHub
commit dc01094863
1 changed files with 5 additions and 0 deletions
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5
middlewares/stripPrefix.go
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@ -5,6 +5,10 @@ import (
"strings" "strings"
) )
const (
forwardedPrefixHeader = "X-Forwarded-Prefix"
)
// StripPrefix is a middleware used to strip prefix from an URL request // StripPrefix is a middleware used to strip prefix from an URL request
type StripPrefix struct { type StripPrefix struct {
Handler http.Handler Handler http.Handler
@ -15,6 +19,7 @@ func (s *StripPrefix) ServeHTTP(w http.ResponseWriter, r *http.Request) {
for _, prefix := range s.Prefixes { for _, prefix := range s.Prefixes {
if p := strings.TrimPrefix(r.URL.Path, strings.TrimSpace(prefix)); len(p) < len(r.URL.Path) { if p := strings.TrimPrefix(r.URL.Path, strings.TrimSpace(prefix)); len(p) < len(r.URL.Path) {
r.URL.Path = p r.URL.Path = p
r.Header[forwardedPrefixHeader] = []string{prefix}
r.RequestURI = r.URL.RequestURI() r.RequestURI = r.URL.RequestURI()
s.Handler.ServeHTTP(w, r) s.Handler.ServeHTTP(w, r)
return return