80 lines
1.8 KiB
Go
80 lines
1.8 KiB
Go
package traefik_umami_feeder
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// Copied source from
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// https://github.com/kzmake/traefik-plugin-forward-request/blob/master/util.go
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import (
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"net"
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"net/http"
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"strings"
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)
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const (
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xForwardedProto = "x-forwarded-proto"
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xForwardedFor = "x-forwarded-for"
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xForwardedHost = "x-forwarded-host"
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xForwardedPort = "x-forwarded-port"
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xForwardedURI = "x-forwarded-uri"
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xForwardedMethod = "x-forwarded-method"
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)
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func copyHeaders(dst, src http.Header, headersToCopy []string) {
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for _, key := range headersToCopy {
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if values := src.Values(key); len(values) > 0 {
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dst[key] = values
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}
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}
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}
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func writeXForwardedHeaders(dst http.Header, req *http.Request) {
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if clientIP, _, err := net.SplitHostPort(req.RemoteAddr); err == nil {
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if values := req.Header.Values(xForwardedFor); len(values) > 0 {
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clientIP = strings.Join(values, ", ") + ", " + clientIP
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}
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dst.Set(xForwardedFor, clientIP)
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}
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xfm := req.Header.Get(xForwardedMethod)
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switch {
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case xfm != "":
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dst.Set(xForwardedMethod, xfm)
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case req.Method != "":
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dst.Set(xForwardedMethod, req.Method)
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default:
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dst.Del(xForwardedMethod)
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}
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xfp := req.Header.Get(xForwardedProto)
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switch {
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case xfp != "":
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dst.Set(xForwardedProto, xfp)
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case req.TLS != nil:
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dst.Set(xForwardedProto, "https")
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default:
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dst.Set(xForwardedProto, "http")
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}
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if xfp := req.Header.Get(xForwardedPort); xfp != "" {
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dst.Set(xForwardedPort, xfp)
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}
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xfh := req.Header.Get(xForwardedHost)
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switch {
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case xfh != "":
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dst.Set(xForwardedHost, xfh)
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case req.Host != "":
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dst.Set(xForwardedHost, req.Host)
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default:
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dst.Del(xForwardedHost)
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}
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xfu := req.Header.Get(xForwardedURI)
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switch {
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case xfu != "":
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dst.Set(xForwardedURI, xfu)
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case req.URL.RequestURI() != "":
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dst.Set(xForwardedURI, req.URL.RequestURI())
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default:
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dst.Del(xForwardedURI)
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}
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}
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