61 lines
1.6 KiB
Go
61 lines
1.6 KiB
Go
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package auth
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import (
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"io/ioutil"
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"net/http"
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"github.com/containous/traefik/log"
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"github.com/containous/traefik/types"
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)
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// Forward the authentication to a external server
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func Forward(forward *types.Forward, w http.ResponseWriter, r *http.Request, next http.HandlerFunc) {
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httpClient := http.Client{}
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if forward.TLS != nil {
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tlsConfig, err := forward.TLS.CreateTLSConfig()
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if err != nil {
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log.Debugf("Impossible to configure TLS to call %s. Cause %s", forward.Address, err)
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w.WriteHeader(http.StatusInternalServerError)
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return
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}
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httpClient.Transport = &http.Transport{
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TLSClientConfig: tlsConfig,
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}
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}
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forwardReq, err := http.NewRequest(http.MethodGet, forward.Address, nil)
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if err != nil {
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log.Debugf("Error calling %s. Cause %s", forward.Address, err)
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w.WriteHeader(http.StatusInternalServerError)
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return
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}
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forwardReq.Header = r.Header
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forwardResponse, forwardErr := httpClient.Do(forwardReq)
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if forwardErr != nil {
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log.Debugf("Error calling %s. Cause: %s", forward.Address, forwardErr)
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w.WriteHeader(http.StatusInternalServerError)
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return
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}
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body, readError := ioutil.ReadAll(forwardResponse.Body)
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if readError != nil {
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log.Debugf("Error reading body %s. Cause: %s", forward.Address, readError)
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w.WriteHeader(http.StatusInternalServerError)
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return
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}
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defer forwardResponse.Body.Close()
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if forwardResponse.StatusCode < http.StatusOK || forwardResponse.StatusCode >= http.StatusMultipleChoices {
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log.Debugf("Remote error %s. StatusCode: %d", forward.Address, forwardResponse.StatusCode)
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w.WriteHeader(forwardResponse.StatusCode)
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w.Write(body)
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return
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}
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r.RequestURI = r.URL.RequestURI()
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next(w, r)
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}
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