Fixed #106

- Added experimental proxmox fixes
- Fixed upstream error resp code not logging bug

src/mod/dynamicproxy/domainsniff/proxmox.go

@@ -0,0 +1,21 @@
+package domainsniff
+
+import "net/http"
+
+/*
+	Promox API sniffer
+
+	This handler sniff proxmox API endpoint and
+	adjust the request accordingly to fix shits
+	in the proxmox API server
+*/
+
+func IsProxmox(r *http.Request) bool {
+	// Check if any of the cookies is named PVEAuthCookie
+	for _, cookie := range r.Cookies() {
+		if cookie.Name == "PVEAuthCookie" {
+			return true
+		}
+	}
+	return false
+}

src/mod/dynamicproxy/dpcore/dpcore.go

@@ -11,6 +11,7 @@ import (
 	"strings"
 	"time"
 
+	"imuslab.com/zoraxy/mod/dynamicproxy/domainsniff"
 	"imuslab.com/zoraxy/mod/dynamicproxy/permissionpolicy"
 )
 
@@ -50,7 +51,6 @@ type ReverseProxy struct {
 	ModifyResponse func(*http.Response) error
 
 	//Prepender is an optional prepend text for URL rewrite
-	//
 	Prepender string
 
 	Verbal bool
@@ -258,7 +258,7 @@ func (p *ReverseProxy) logf(format string, args ...interface{}) {
 	}
 }
 
-func (p *ReverseProxy) ProxyHTTP(rw http.ResponseWriter, req *http.Request, rrr *ResponseRewriteRuleSet) error {
+func (p *ReverseProxy) ProxyHTTP(rw http.ResponseWriter, req *http.Request, rrr *ResponseRewriteRuleSet) (int, error) {
 	transport := p.Transport
 
 	outreq := new(http.Request)
@@ -313,6 +313,11 @@ func (p *ReverseProxy) ProxyHTTP(rw http.ResponseWriter, req *http.Request, rrr
 	// Rewrite outbound UA, must be after user headers
 	rewriteUserAgent(outreq.Header, "Zoraxy/"+rrr.Version)
 
+	//Fix proxmox transfer encoding bug if detected Proxmox Cookie
+	if domainsniff.IsProxmox(req) {
+		outreq.TransferEncoding = []string{"identity"}
+	}
+
 	res, err := transport.RoundTrip(outreq)
 	if err != nil {
 		if p.Verbal {
@@ -320,7 +325,7 @@ func (p *ReverseProxy) ProxyHTTP(rw http.ResponseWriter, req *http.Request, rrr
 		}
 
 		//rw.WriteHeader(http.StatusBadGateway)
-		return err
+		return http.StatusBadGateway, err
 	}
 
 	// Remove hop-by-hop headers listed in the "Connection" header of the response, Remove hop-by-hop headers.
@@ -341,7 +346,7 @@ func (p *ReverseProxy) ProxyHTTP(rw http.ResponseWriter, req *http.Request, rrr
 			}
 
 			//rw.WriteHeader(http.StatusBadGateway)
-			return err
+			return http.StatusBadGateway, err
 		}
 	}
 
@@ -388,7 +393,6 @@ func (p *ReverseProxy) ProxyHTTP(rw http.ResponseWriter, req *http.Request, rrr
 	copyHeader(rw.Header(), res.Header)
 
 	// inject permission policy headers
-	//TODO: Load permission policy from rrr
 	permissionpolicy.InjectPermissionPolicyHeader(rw, nil)
 
 	// The "Trailer" header isn't included in the Transport's response, Build it up from Trailer.
@@ -418,14 +422,14 @@ func (p *ReverseProxy) ProxyHTTP(rw http.ResponseWriter, req *http.Request, rrr
 	res.Body.Close()
 	copyHeader(rw.Header(), res.Trailer)
 
-	return nil
+	return res.StatusCode, nil
 }
 
-func (p *ReverseProxy) ProxyHTTPS(rw http.ResponseWriter, req *http.Request) error {
+func (p *ReverseProxy) ProxyHTTPS(rw http.ResponseWriter, req *http.Request) (int, error) {
 	hij, ok := rw.(http.Hijacker)
 	if !ok {
 		p.logf("http server does not support hijacker")
-		return errors.New("http server does not support hijacker")
+		return http.StatusNotImplemented, errors.New("http server does not support hijacker")
 	}
 
 	clientConn, _, err := hij.Hijack()
@@ -433,7 +437,7 @@ func (p *ReverseProxy) ProxyHTTPS(rw http.ResponseWriter, req *http.Request) err
 		if p.Verbal {
 			p.logf("http: proxy error: %v", err)
 		}
-		return err
+		return http.StatusInternalServerError, err
 	}
 
 	proxyConn, err := net.Dial("tcp", req.URL.Host)
@@ -442,7 +446,7 @@ func (p *ReverseProxy) ProxyHTTPS(rw http.ResponseWriter, req *http.Request) err
 			p.logf("http: proxy error: %v", err)
 		}
 
-		return err
+		return http.StatusInternalServerError, err
 	}
 
 	// The returned net.Conn may have read or write deadlines
@@ -461,7 +465,7 @@ func (p *ReverseProxy) ProxyHTTPS(rw http.ResponseWriter, req *http.Request) err
 		if p.Verbal {
 			p.logf("http: proxy error: %v", err)
 		}
-		return err
+		return http.StatusGatewayTimeout, err
 	}
 
 	err = proxyConn.SetDeadline(deadline)
@@ -470,7 +474,7 @@ func (p *ReverseProxy) ProxyHTTPS(rw http.ResponseWriter, req *http.Request) err
 			p.logf("http: proxy error: %v", err)
 		}
 
-		return err
+		return http.StatusGatewayTimeout, err
 	}
 
 	_, err = clientConn.Write([]byte("HTTP/1.0 200 OK\r\n\r\n"))
@@ -479,7 +483,7 @@ func (p *ReverseProxy) ProxyHTTPS(rw http.ResponseWriter, req *http.Request) err
 			p.logf("http: proxy error: %v", err)
 		}
 
-		return err
+		return http.StatusInternalServerError, err
 	}
 
 	go func() {
@@ -492,15 +496,13 @@ func (p *ReverseProxy) ProxyHTTPS(rw http.ResponseWriter, req *http.Request) err
 	proxyConn.Close()
 	clientConn.Close()
 
-	return nil
+	return http.StatusOK, nil
 }
 
-func (p *ReverseProxy) ServeHTTP(rw http.ResponseWriter, req *http.Request, rrr *ResponseRewriteRuleSet) error {
+func (p *ReverseProxy) ServeHTTP(rw http.ResponseWriter, req *http.Request, rrr *ResponseRewriteRuleSet) (int, error) {
 	if req.Method == "CONNECT" {
-		err := p.ProxyHTTPS(rw, req)
-		return err
+		return p.ProxyHTTPS(rw, req)
 	} else {
-		err := p.ProxyHTTP(rw, req, rrr)
-		return err
+		return p.ProxyHTTP(rw, req, rrr)
 	}
 }

src/mod/dynamicproxy/dpcore/utils.go

@@ -1,7 +1,10 @@
 package dpcore
 
 import (
+	"bytes"
+	"io"
 	"net"
+	"net/http"
 	"net/url"
 	"strings"
 )
@@ -92,3 +95,63 @@ func isExternalDomainName(hostname string) bool {
 
 	return true
 }
+
+// DeepCopyRequest returns a deep copy of the given http.Request.
+func DeepCopyRequest(req *http.Request) (*http.Request, error) {
+	// Copy the URL
+	urlCopy := *req.URL
+
+	// Copy the headers
+	headersCopy := make(http.Header, len(req.Header))
+	for k, vv := range req.Header {
+		vvCopy := make([]string, len(vv))
+		copy(vvCopy, vv)
+		headersCopy[k] = vvCopy
+	}
+
+	// Copy the cookies
+	cookiesCopy := make([]*http.Cookie, len(req.Cookies()))
+	for i, cookie := range req.Cookies() {
+		cookieCopy := *cookie
+		cookiesCopy[i] = &cookieCopy
+	}
+
+	// Copy the body, if present
+	var bodyCopy io.ReadCloser
+	if req.Body != nil {
+		var buf bytes.Buffer
+		if _, err := buf.ReadFrom(req.Body); err != nil {
+			return nil, err
+		}
+		// Reset the request body so it can be read again
+		if err := req.Body.Close(); err != nil {
+			return nil, err
+		}
+		req.Body = io.NopCloser(&buf)
+		bodyCopy = io.NopCloser(bytes.NewReader(buf.Bytes()))
+	}
+
+	// Create the new request
+	reqCopy := &http.Request{
+		Method:           req.Method,
+		URL:              &urlCopy,
+		Proto:            req.Proto,
+		ProtoMajor:       req.ProtoMajor,
+		ProtoMinor:       req.ProtoMinor,
+		Header:           headersCopy,
+		Body:             bodyCopy,
+		ContentLength:    req.ContentLength,
+		TransferEncoding: append([]string(nil), req.TransferEncoding...),
+		Close:            req.Close,
+		Host:             req.Host,
+		Form:             req.Form,
+		PostForm:         req.PostForm,
+		MultipartForm:    req.MultipartForm,
+		Trailer:          req.Trailer,
+		RemoteAddr:       req.RemoteAddr,
+		TLS:              req.TLS,
+		// Cancel and Context are not copied as it might cause issues
+	}
+
+	return reqCopy, nil
+}

src/mod/dynamicproxy/loadbalance/upstream.go

@@ -61,8 +61,8 @@ func (u *Upstream) Clone() *Upstream {
 	return &newUpstream
 }
 
-// ServeHTTP uses this upstream proxy router to route the current request
-func (u *Upstream) ServeHTTP(w http.ResponseWriter, r *http.Request, rrr *dpcore.ResponseRewriteRuleSet) error {
+// ServeHTTP uses this upstream proxy router to route the current request, return the status code and error if any
+func (u *Upstream) ServeHTTP(w http.ResponseWriter, r *http.Request, rrr *dpcore.ResponseRewriteRuleSet) (int, error) {
 	//Auto rewrite to upstream origin if not set
 	if rrr.ProxyDomain == "" {
 		rrr.ProxyDomain = u.OriginIpOrDomain

src/mod/dynamicproxy/proxyRequestHandler.go

@@ -112,6 +112,8 @@ func (router *Router) rewriteURL(rooturl string, requestURL string) string {
 func (h *ProxyHandler) hostRequest(w http.ResponseWriter, r *http.Request, target *ProxyEndpoint) {
 	r.Header.Set("X-Forwarded-Host", r.Host)
 	r.Header.Set("X-Forwarded-Server", "zoraxy-"+h.Parent.Option.HostUUID)
+
+	/* Load balancing */
 	selectedUpstream, err := h.Parent.loadBalancer.GetRequestUpstreamTarget(w, r, target.ActiveOrigins, target.UseStickySession)
 	if err != nil {
 		http.ServeFile(w, r, "./web/rperror.html")
@@ -119,30 +121,34 @@ func (h *ProxyHandler) hostRequest(w http.ResponseWriter, r *http.Request, targe
 		h.Parent.logRequest(r, false, 521, "subdomain-http", r.URL.Hostname())
 		return
 	}
-	requestURL := r.URL.String()
-	if r.Header["Upgrade"] != nil && strings.ToLower(r.Header["Upgrade"][0]) == "websocket" {
-		//Handle WebSocket request. Forward the custom Upgrade header and rewrite origin
-		r.Header.Set("Zr-Origin-Upgrade", "websocket")
-		wsRedirectionEndpoint := selectedUpstream.OriginIpOrDomain
-		if wsRedirectionEndpoint[len(wsRedirectionEndpoint)-1:] != "/" {
-			//Append / to the end of the redirection endpoint if not exists
-			wsRedirectionEndpoint = wsRedirectionEndpoint + "/"
+
+	/* WebSocket automatic proxy */
+	if !target.DisableAutoWebSockeyProxy {
+		requestURL := r.URL.String()
+		if r.Header["Upgrade"] != nil && strings.ToLower(r.Header["Upgrade"][0]) == "websocket" {
+			//Handle WebSocket request. Forward the custom Upgrade header and rewrite origin
+			r.Header.Set("Zr-Origin-Upgrade", "websocket")
+			wsRedirectionEndpoint := selectedUpstream.OriginIpOrDomain
+			if wsRedirectionEndpoint[len(wsRedirectionEndpoint)-1:] != "/" {
+				//Append / to the end of the redirection endpoint if not exists
+				wsRedirectionEndpoint = wsRedirectionEndpoint + "/"
+			}
+			if len(requestURL) > 0 && requestURL[:1] == "/" {
+				//Remove starting / from request URL if exists
+				requestURL = requestURL[1:]
+			}
+			u, _ := url.Parse("ws://" + wsRedirectionEndpoint + requestURL)
+			if selectedUpstream.RequireTLS {
+				u, _ = url.Parse("wss://" + wsRedirectionEndpoint + requestURL)
+			}
+			h.Parent.logRequest(r, true, 101, "host-websocket", selectedUpstream.OriginIpOrDomain)
+			wspHandler := websocketproxy.NewProxy(u, websocketproxy.Options{
+				SkipTLSValidation: selectedUpstream.SkipCertValidations,
+				SkipOriginCheck:   selectedUpstream.SkipWebSocketOriginCheck,
+			})
+			wspHandler.ServeHTTP(w, r)
+			return
 		}
-		if len(requestURL) > 0 && requestURL[:1] == "/" {
-			//Remove starting / from request URL if exists
-			requestURL = requestURL[1:]
-		}
-		u, _ := url.Parse("ws://" + wsRedirectionEndpoint + requestURL)
-		if selectedUpstream.RequireTLS {
-			u, _ = url.Parse("wss://" + wsRedirectionEndpoint + requestURL)
-		}
-		h.Parent.logRequest(r, true, 101, "host-websocket", selectedUpstream.OriginIpOrDomain)
-		wspHandler := websocketproxy.NewProxy(u, websocketproxy.Options{
-			SkipTLSValidation: selectedUpstream.SkipCertValidations,
-			SkipOriginCheck:   selectedUpstream.SkipWebSocketOriginCheck,
-		})
-		wspHandler.ServeHTTP(w, r)
-		return
 	}
 
 	originalHostHeader := r.Host
@@ -156,7 +162,7 @@ func (h *ProxyHandler) hostRequest(w http.ResponseWriter, r *http.Request, targe
 	//Build downstream and upstream header rules
 	upstreamHeaders, downstreamHeaders := target.SplitInboundOutboundHeaders()
 
-	err = selectedUpstream.ServeHTTP(w, r, &dpcore.ResponseRewriteRuleSet{
+	statusCode, err := selectedUpstream.ServeHTTP(w, r, &dpcore.ResponseRewriteRuleSet{
 		ProxyDomain:         selectedUpstream.OriginIpOrDomain,
 		OriginalHost:        originalHostHeader,
 		UseTLS:              selectedUpstream.RequireTLS,
@@ -182,7 +188,7 @@ func (h *ProxyHandler) hostRequest(w http.ResponseWriter, r *http.Request, targe
 		}
 	}
 
-	h.Parent.logRequest(r, true, 200, "host-http", r.URL.Hostname())
+	h.Parent.logRequest(r, true, statusCode, "host-http", r.URL.Hostname())
 }
 
 // Handle vdir type request
@@ -224,7 +230,7 @@ func (h *ProxyHandler) vdirRequest(w http.ResponseWriter, r *http.Request, targe
 	//Build downstream and upstream header rules
 	upstreamHeaders, downstreamHeaders := target.parent.SplitInboundOutboundHeaders()
 
-	err := target.proxy.ServeHTTP(w, r, &dpcore.ResponseRewriteRuleSet{
+	statusCode, err := target.proxy.ServeHTTP(w, r, &dpcore.ResponseRewriteRuleSet{
 		ProxyDomain:         target.Domain,
 		OriginalHost:        originalHostHeader,
 		UseTLS:              target.RequireTLS,
@@ -247,7 +253,7 @@ func (h *ProxyHandler) vdirRequest(w http.ResponseWriter, r *http.Request, targe
 			h.Parent.logRequest(r, false, 521, "vdir-http", target.Domain)
 		}
 	}
-	h.Parent.logRequest(r, true, 200, "vdir-http", target.Domain)
+	h.Parent.logRequest(r, true, statusCode, "vdir-http", target.Domain)
 
 }
 

src/mod/dynamicproxy/typedef.go

@@ -136,7 +136,8 @@ type ProxyEndpoint struct {
 	HSTSMaxAge                   int64                               //HSTS max age, set to 0 for disable HSTS headers
 	EnablePermissionPolicyHeader bool                                //Enable injection of permission policy header
 	PermissionPolicy             *permissionpolicy.PermissionsPolicy //Permission policy header
-	DisableHopByHopHeaderRemoval bool                                //TODO: Do not remove hop-by-hop headers
+	DisableHopByHopHeaderRemoval bool                                //Do not remove hop-by-hop headers
+	DisableAutoWebSockeyProxy    bool                                //Disable auto sniffing logic for websocket upgrade
 
 	//Authentication
 	RequireBasicAuth        bool                      //Set to true to request basic auth before proxy

src/reverseproxy.go

@@ -1349,7 +1349,8 @@ func HandleHopByHop(w http.ResponseWriter, r *http.Request) {
 		//we need to clone and respawn this proxy endpoint
 		newProxyEndpoint := targetProxyEndpoint.Clone()
 		//Storage file use false as default, so disable removal = not enable remover
-		targetProxyEndpoint.DisableHopByHopHeaderRemoval = !enableHopByHopRemover
+		newProxyEndpoint.DisableHopByHopHeaderRemoval = !enableHopByHopRemover
+
 		//Save proxy endpoint
 		err = SaveReverseProxyConfig(newProxyEndpoint)
 		if err != nil {