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package proxy
import (
"../badgateway"
"net/http"
"net/http/httputil"
"net/url"
"sync"
)
type Proxy struct {
URL *url.URL
Version string
RoundTripper *badgateway.RoundTripper
_reverseProxy *httputil.ReverseProxy
configureReverseProxyOnce sync.Once
}
func (p *Proxy) reverseProxy() *httputil.ReverseProxy {
p.configureReverseProxyOnce.Do(func() {
u := *p.URL // Make a copy of p.URL
u.Path = ""
p._reverseProxy = httputil.NewSingleHostReverseProxy(&u)
if p.RoundTripper != nil {
p._reverseProxy.Transport = p.RoundTripper
} else {
p._reverseProxy.Transport = badgateway.NewRoundTripper("", 0)
}
})
return p._reverseProxy
}
func HeaderClone(h http.Header) http.Header {
h2 := make(http.Header, len(h))
for k, vv := range h {
vv2 := make([]string, len(vv))
copy(vv2, vv)
h2[k] = vv2
}
return h2
}
func (p *Proxy) ServeHTTP(w http.ResponseWriter, r *http.Request) {
// Clone request
req := *r
req.Header = HeaderClone(r.Header)
// Set Workhorse version
req.Header.Set("Gitlab-Workhorse", p.Version)
rw := newSendFileResponseWriter(w, &req)
defer rw.Flush()
p.reverseProxy().ServeHTTP(&rw, &req)
}