diff options
Diffstat (limited to 'vendor/github.com/gorilla/handlers/proxy_headers.go')
| -rw-r--r-- | vendor/github.com/gorilla/handlers/proxy_headers.go | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/vendor/github.com/gorilla/handlers/proxy_headers.go b/vendor/github.com/gorilla/handlers/proxy_headers.go index ed939dcef..281d753e9 100644 --- a/vendor/github.com/gorilla/handlers/proxy_headers.go +++ b/vendor/github.com/gorilla/handlers/proxy_headers.go @@ -18,7 +18,7 @@ var ( var ( // RFC7239 defines a new "Forwarded: " header designed to replace the // existing use of X-Forwarded-* headers. - // e.g. Forwarded: for=192.0.2.60;proto=https;by=203.0.113.43 + // e.g. Forwarded: for=192.0.2.60;proto=https;by=203.0.113.43. forwarded = http.CanonicalHeaderKey("Forwarded") // Allows for a sub-match of the first value after 'for=' to the next // comma, semi-colon or space. The match is case-insensitive. @@ -67,7 +67,9 @@ func ProxyHeaders(h http.Handler) http.Handler { func getIP(r *http.Request) string { var addr string - if fwd := r.Header.Get(xForwardedFor); fwd != "" { + switch { + case r.Header.Get(xForwardedFor) != "": + fwd := r.Header.Get(xForwardedFor) // Only grab the first (client) address. Note that '192.168.0.1, // 10.1.1.1' is a valid key for X-Forwarded-For where addresses after // the first may represent forwarding proxies earlier in the chain. @@ -76,17 +78,15 @@ func getIP(r *http.Request) string { s = len(fwd) } addr = fwd[:s] - } else if fwd := r.Header.Get(xRealIP); fwd != "" { - // X-Real-IP should only contain one IP address (the client making the - // request). - addr = fwd - } else if fwd := r.Header.Get(forwarded); fwd != "" { + case r.Header.Get(xRealIP) != "": + addr = r.Header.Get(xRealIP) + case r.Header.Get(forwarded) != "": // match should contain at least two elements if the protocol was // specified in the Forwarded header. The first element will always be // the 'for=' capture, which we ignore. In the case of multiple IP // addresses (for=8.8.8.8, 8.8.4.4,172.16.1.20 is valid) we only // extract the first, which should be the client IP. - if match := forRegex.FindStringSubmatch(fwd); len(match) > 1 { + if match := forRegex.FindStringSubmatch(r.Header.Get(forwarded)); len(match) > 1 { // IPv6 addresses in Forwarded headers are quoted-strings. We strip // these quotes. addr = strings.Trim(match[1], `"`) |