Added new custom header structure

+ Moved custom header rewrite to dpcore
+ Restructure dpcore header rewrite sequence
+ Added advance custom header settings (zoraxy to upstream and zoraxy to downstream mode)
+ Added header remove feature
+ Removed password requirement for SMTP #80
+ Completed stream proxy module (TCP and UDP)
+ Optimized UX for reminding user to click Apply after port change
+ Added version number to footer #160

src/mod/dynamicproxy/Server.go

@@ -39,9 +39,6 @@ func (h *ProxyHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	//Inject headers
-	w.Header().Set("x-proxy-by", "zoraxy/"+h.Parent.Option.HostVersion)
-
 	/*
 		Redirection Routing
 	*/

src/mod/dynamicproxy/customHeader.go

@@ -0,0 +1,46 @@
+package dynamicproxy
+
+/*
+	CustomHeader.go
+
+	This script handle parsing and injecting custom headers
+	into the dpcore routing logic
+*/
+
+//SplitInboundOutboundHeaders split user defined headers into upstream and downstream headers
+//return upstream header and downstream header key-value pairs
+//if the header is expected to be deleted, the value will be set to empty string
+func (ept *ProxyEndpoint) SplitInboundOutboundHeaders() ([][]string, [][]string) {
+	if len(ept.UserDefinedHeaders) == 0 {
+		//Early return if there are no defined headers
+		return [][]string{}, [][]string{}
+	}
+
+	//Use pre-allocation for faster performance
+	upstreamHeaders := make([][]string, len(ept.UserDefinedHeaders))
+	downstreamHeaders := make([][]string, len(ept.UserDefinedHeaders))
+	upstreamHeaderCounter := 0
+	downstreamHeaderCounter := 0
+
+	//Sort the headers into upstream or downstream
+	for _, customHeader := range ept.UserDefinedHeaders {
+		thisHeaderSet := make([]string, 2)
+		thisHeaderSet[0] = customHeader.Key
+		thisHeaderSet[1] = customHeader.Value
+		if customHeader.IsRemove {
+			//Prevent invalid config
+			thisHeaderSet[1] = ""
+		}
+
+		//Assign to slice
+		if customHeader.Direction == HeaderDirection_ZoraxyToUpstream {
+			upstreamHeaders[upstreamHeaderCounter] = thisHeaderSet
+			upstreamHeaderCounter++
+		} else if customHeader.Direction == HeaderDirection_ZoraxyToDownstream {
+			downstreamHeaders[downstreamHeaderCounter] = thisHeaderSet
+			downstreamHeaderCounter++
+		}
+	}
+
+	return upstreamHeaders, downstreamHeaders
+}

src/mod/dynamicproxy/dpcore/dpcore.go

@@ -57,11 +57,14 @@ type ReverseProxy struct {
 }
 
 type ResponseRewriteRuleSet struct {
-	ProxyDomain  string
-	OriginalHost string
-	UseTLS       bool
-	NoCache      bool
-	PathPrefix   string //Vdir prefix for root, / will be rewrite to this
+	ProxyDomain       string
+	OriginalHost      string
+	UseTLS            bool
+	NoCache           bool
+	PathPrefix        string //Vdir prefix for root, / will be rewrite to this
+	UpstreamHeaders   [][]string
+	DownstreamHeaders [][]string
+	Version           string //Version number of Zoraxy, use for X-Proxy-By
 }
 
 type requestCanceler interface {
@@ -248,82 +251,6 @@ func (p *ReverseProxy) logf(format string, args ...interface{}) {
 	}
 }
 
-func removeHeaders(header http.Header, noCache bool) {
-	// Remove hop-by-hop headers listed in the "Connection" header.
-	if c := header.Get("Connection"); c != "" {
-		for _, f := range strings.Split(c, ",") {
-			if f = strings.TrimSpace(f); f != "" {
-				header.Del(f)
-			}
-		}
-	}
-
-	// Remove hop-by-hop headers
-	for _, h := range hopHeaders {
-		if header.Get(h) != "" {
-			header.Del(h)
-		}
-	}
-
-	//Restore the Upgrade header if any
-	if header.Get("Zr-Origin-Upgrade") != "" {
-		header.Set("Upgrade", header.Get("Zr-Origin-Upgrade"))
-		header.Del("Zr-Origin-Upgrade")
-	}
-
-	//Disable cache if nocache is set
-	if noCache {
-		header.Del("Cache-Control")
-		header.Set("Cache-Control", "no-store")
-	}
-
-	//Hide Go-HTTP-Client UA if the client didnt sent us one
-	if _, ok := header["User-Agent"]; !ok {
-		// If the outbound request doesn't have a User-Agent header set,
-		// don't send the default Go HTTP client User-Agent.
-		header.Set("User-Agent", "")
-	}
-
-}
-
-func addXForwardedForHeader(req *http.Request) {
-	if clientIP, _, err := net.SplitHostPort(req.RemoteAddr); err == nil {
-		// If we aren't the first proxy retain prior
-		// X-Forwarded-For information as a comma+space
-		// separated list and fold multiple headers into one.
-		if prior, ok := req.Header["X-Forwarded-For"]; ok {
-			clientIP = strings.Join(prior, ", ") + ", " + clientIP
-		}
-		req.Header.Set("X-Forwarded-For", clientIP)
-		if req.TLS != nil {
-			req.Header.Set("X-Forwarded-Proto", "https")
-		} else {
-			req.Header.Set("X-Forwarded-Proto", "http")
-		}
-
-		if req.Header.Get("X-Real-Ip") == "" {
-			//Check if CF-Connecting-IP header exists
-			CF_Connecting_IP := req.Header.Get("CF-Connecting-IP")
-			Fastly_Client_IP := req.Header.Get("Fastly-Client-IP")
-			if CF_Connecting_IP != "" {
-				//Use CF Connecting IP
-				req.Header.Set("X-Real-Ip", CF_Connecting_IP)
-			} else if Fastly_Client_IP != "" {
-				//Use Fastly Client IP
-				req.Header.Set("X-Real-Ip", Fastly_Client_IP)
-			} else {
-				// Not exists. Fill it in with first entry in X-Forwarded-For
-				ips := strings.Split(clientIP, ",")
-				if len(ips) > 0 {
-					req.Header.Set("X-Real-Ip", strings.TrimSpace(ips[0]))
-				}
-			}
-
-		}
-
-	}
-}
-
 func (p *ReverseProxy) ProxyHTTP(rw http.ResponseWriter, req *http.Request, rrr *ResponseRewriteRuleSet) error {
 	transport := p.Transport
 
@@ -362,12 +289,18 @@ func (p *ReverseProxy) ProxyHTTP(rw http.ResponseWriter, req *http.Request, rrr
 	outreq.Header = make(http.Header)
 	copyHeader(outreq.Header, req.Header)
 
-	// Remove hop-by-hop headers listed in the "Connection" header, Remove hop-by-hop headers.
+	// Remove hop-by-hop headers.
 	removeHeaders(outreq.Header, rrr.NoCache)
 
 	// Add X-Forwarded-For Header.
 	addXForwardedForHeader(outreq)
 
+	// Add user defined headers (to upstream)
+	injectUserDefinedHeaders(outreq.Header, rrr.UpstreamHeaders)
+
+	// Rewrite outbound UA, must be after user headers
+	rewriteUserAgent(outreq.Header, "Zoraxy/"+rrr.Version)
+
 	res, err := transport.RoundTrip(outreq)
 	if err != nil {
 		if p.Verbal {
@@ -398,13 +331,17 @@ func (p *ReverseProxy) ProxyHTTP(rw http.ResponseWriter, req *http.Request, rrr
 		}
 	}
 
+	//TODO: Figure out a way to proxy for proxmox
 	//if res.StatusCode == 501 || res.StatusCode == 500 {
 	//	fmt.Println(outreq.Proto, outreq.RemoteAddr, outreq.RequestURI)
 	//	fmt.Println(">>>", outreq.Method, res.Header, res.ContentLength, res.StatusCode)
 	//	fmt.Println(outreq.Header, req.Host)
 	//}
 
-	//Custom header rewriter functions
+	//Add debug X-Proxy-By tracker
+	res.Header.Set("x-proxy-by", "zoraxy/"+rrr.Version)
+
+	//Custom Location header rewriter functions
 	if res.Header.Get("Location") != "" {
 		locationRewrite := res.Header.Get("Location")
 		originLocation := res.Header.Get("Location")
@@ -430,6 +367,9 @@ func (p *ReverseProxy) ProxyHTTP(rw http.ResponseWriter, req *http.Request, rrr
 		res.Header.Set("Location", locationRewrite)
 	}
 
+	// Add user defined headers (to downstream)
+	injectUserDefinedHeaders(res.Header, rrr.DownstreamHeaders)
+
 	// Copy header from response to client.
 	copyHeader(rw.Header(), res.Header)
 

src/mod/dynamicproxy/dpcore/header.go

@@ -0,0 +1,121 @@
+package dpcore
+
+import (
+	"net"
+	"net/http"
+	"strings"
+)
+
+/*
+	Header.go
+
+	This script handles headers rewrite and remove
+	in dpcore.
+
+	Added in Zoraxy v3.0.6 by tobychui
+*/
+
+// removeHeaders Remove hop-by-hop headers listed in the "Connection" header, Remove hop-by-hop headers.
+func removeHeaders(header http.Header, noCache bool) {
+	// Remove hop-by-hop headers listed in the "Connection" header.
+	if c := header.Get("Connection"); c != "" {
+		for _, f := range strings.Split(c, ",") {
+			if f = strings.TrimSpace(f); f != "" {
+				header.Del(f)
+			}
+		}
+	}
+
+	// Remove hop-by-hop headers
+	for _, h := range hopHeaders {
+		if header.Get(h) != "" {
+			header.Del(h)
+		}
+	}
+
+	//Restore the Upgrade header if any
+	if header.Get("Zr-Origin-Upgrade") != "" {
+		header.Set("Upgrade", header.Get("Zr-Origin-Upgrade"))
+		header.Del("Zr-Origin-Upgrade")
+	}
+
+	//Disable cache if nocache is set
+	if noCache {
+		header.Del("Cache-Control")
+		header.Set("Cache-Control", "no-store")
+	}
+
+}
+
+// rewriteUserAgent rewrite the user agent based on incoming request
+func rewriteUserAgent(header http.Header, UA string) {
+	//Hide Go-HTTP-Client UA if the client didnt sent us one
+	if header.Get("User-Agent") == "" {
+		// If the outbound request doesn't have a User-Agent header set,
+		// don't send the default Go HTTP client User-Agent
+		header.Del("User-Agent")
+		header.Set("User-Agent", UA)
+	}
+}
+
+// Add X-Forwarded-For Header and rewrite X-Real-Ip according to sniffing logics
+func addXForwardedForHeader(req *http.Request) {
+	if clientIP, _, err := net.SplitHostPort(req.RemoteAddr); err == nil {
+		// If we aren't the first proxy retain prior
+		// X-Forwarded-For information as a comma+space
+		// separated list and fold multiple headers into one.
+		if prior, ok := req.Header["X-Forwarded-For"]; ok {
+			clientIP = strings.Join(prior, ", ") + ", " + clientIP
+		}
+		req.Header.Set("X-Forwarded-For", clientIP)
+		if req.TLS != nil {
+			req.Header.Set("X-Forwarded-Proto", "https")
+		} else {
+			req.Header.Set("X-Forwarded-Proto", "http")
+		}
+
+		if req.Header.Get("X-Real-Ip") == "" {
+			//Check if CF-Connecting-IP header exists
+			CF_Connecting_IP := req.Header.Get("CF-Connecting-IP")
+			Fastly_Client_IP := req.Header.Get("Fastly-Client-IP")
+			if CF_Connecting_IP != "" {
+				//Use CF Connecting IP
+				req.Header.Set("X-Real-Ip", CF_Connecting_IP)
+			} else if Fastly_Client_IP != "" {
+				//Use Fastly Client IP
+				req.Header.Set("X-Real-Ip", Fastly_Client_IP)
+			} else {
+				// Not exists. Fill it in with first entry in X-Forwarded-For
+				ips := strings.Split(clientIP, ",")
+				if len(ips) > 0 {
+					req.Header.Set("X-Real-Ip", strings.TrimSpace(ips[0]))
+				}
+			}
+
+		}
+
+	}
+}
+
+// injectUserDefinedHeaders inject the user headers from slice
+// if a value is empty string, the key will be removed from header.
+// if a key is empty string, the function will return immediately
+func injectUserDefinedHeaders(header http.Header, userHeaders [][]string) {
+	for _, userHeader := range userHeaders {
+		if len(userHeader) == 0 {
+			//End of header slice
+			return
+		}
+		headerKey := userHeader[0]
+		headerValue := userHeader[1]
+		if headerValue == "" {
+			//Remove header from head
+			header.Del(headerKey)
+			continue
+		}
+
+		//Default: Set header value
+		header.Del(headerKey) //Remove header if it already exists
+		header.Set(headerKey, headerValue)
+	}
+}

src/mod/dynamicproxy/dynamicproxy.go

@@ -142,6 +142,7 @@ func (router *Router) StartProxyService() error {
 							OriginalHost: originalHostHeader,
 							UseTLS:       sep.RequireTLS,
 							PathPrefix:   "",
+							Version:      sep.parent.Option.HostVersion,
 						})
 						return
 					}

src/mod/dynamicproxy/endpoints.go

@@ -30,7 +30,6 @@ func (ep *ProxyEndpoint) UserDefinedHeaderExists(key string) bool {
 			return true
 		}
 	}
-
 	return false
 }
 
@@ -49,16 +48,13 @@ func (ep *ProxyEndpoint) RemoveUserDefinedHeader(key string) error {
 }
 
 // Add a user defined header to the list, duplicates will be automatically removed
-func (ep *ProxyEndpoint) AddUserDefinedHeader(key string, value string) error {
-	if ep.UserDefinedHeaderExists(key) {
-		ep.RemoveUserDefinedHeader(key)
+func (ep *ProxyEndpoint) AddUserDefinedHeader(newHeaderRule *UserDefinedHeader) error {
+	if ep.UserDefinedHeaderExists(newHeaderRule.Key) {
+		ep.RemoveUserDefinedHeader(newHeaderRule.Key)
 	}
 
-	ep.UserDefinedHeaders = append(ep.UserDefinedHeaders, &UserDefinedHeader{
-		Key:   cases.Title(language.Und, cases.NoLower).String(key), //e.g. x-proxy-by -> X-Proxy-By
-		Value: value,
-	})
-
+	newHeaderRule.Key = cases.Title(language.Und, cases.NoLower).String(newHeaderRule.Key)
+	ep.UserDefinedHeaders = append(ep.UserDefinedHeaders, newHeaderRule)
 	return nil
 }
 

src/mod/dynamicproxy/proxyRequestHandler.go

@@ -111,13 +111,6 @@ func (h *ProxyHandler) hostRequest(w http.ResponseWriter, r *http.Request, targe
 	r.Header.Set("X-Forwarded-Host", r.Host)
 	r.Header.Set("X-Forwarded-Server", "zoraxy-"+h.Parent.Option.HostUUID)
 
-	//Inject custom headers
-	if len(target.UserDefinedHeaders) > 0 {
-		for _, customHeader := range target.UserDefinedHeaders {
-			r.Header.Set(customHeader.Key, customHeader.Value)
-		}
-	}
-
 	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
@@ -152,12 +145,18 @@ func (h *ProxyHandler) hostRequest(w http.ResponseWriter, r *http.Request, targe
 		r.URL, _ = url.Parse(originalHostHeader)
 	}
 
+	//Build downstream and upstream header rules
+	upstreamHeaders, downstreamHeaders := target.SplitInboundOutboundHeaders()
+
 	err := target.proxy.ServeHTTP(w, r, &dpcore.ResponseRewriteRuleSet{
-		ProxyDomain:  target.Domain,
-		OriginalHost: originalHostHeader,
-		UseTLS:       target.RequireTLS,
-		NoCache:      h.Parent.Option.NoCache,
-		PathPrefix:   "",
+		ProxyDomain:       target.Domain,
+		OriginalHost:      originalHostHeader,
+		UseTLS:            target.RequireTLS,
+		NoCache:           h.Parent.Option.NoCache,
+		PathPrefix:        "",
+		UpstreamHeaders:   upstreamHeaders,
+		DownstreamHeaders: downstreamHeaders,
+		Version:           target.parent.Option.HostVersion,
 	})
 
 	var dnsError *net.DNSError
@@ -184,13 +183,6 @@ func (h *ProxyHandler) vdirRequest(w http.ResponseWriter, r *http.Request, targe
 	r.Header.Set("X-Forwarded-Host", r.Host)
 	r.Header.Set("X-Forwarded-Server", "zoraxy-"+h.Parent.Option.HostUUID)
 
-	//Inject custom headers
-	if len(target.parent.UserDefinedHeaders) > 0 {
-		for _, customHeader := range target.parent.UserDefinedHeaders {
-			r.Header.Set(customHeader.Key, customHeader.Value)
-		}
-	}
-
 	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")
@@ -219,11 +211,17 @@ func (h *ProxyHandler) vdirRequest(w http.ResponseWriter, r *http.Request, targe
 		r.URL, _ = url.Parse(originalHostHeader)
 	}
 
+	//Build downstream and upstream header rules
+	upstreamHeaders, downstreamHeaders := target.parent.SplitInboundOutboundHeaders()
+
 	err := target.proxy.ServeHTTP(w, r, &dpcore.ResponseRewriteRuleSet{
-		ProxyDomain:  target.Domain,
-		OriginalHost: originalHostHeader,
-		UseTLS:       target.RequireTLS,
-		PathPrefix:   target.MatchingPath,
+		ProxyDomain:       target.Domain,
+		OriginalHost:      originalHostHeader,
+		UseTLS:            target.RequireTLS,
+		PathPrefix:        target.MatchingPath,
+		UpstreamHeaders:   upstreamHeaders,
+		DownstreamHeaders: downstreamHeaders,
+		Version:           target.parent.parent.Option.HostVersion,
 	})
 
 	var dnsError *net.DNSError

src/mod/dynamicproxy/typedef.go

@@ -86,7 +86,6 @@ type UserDefinedHeader struct {
 	Key       string
 	Value     string
 	IsRemove  bool //Instead of set, remove this key instead
-	IsAppend  bool //Instead of set, append to the current one with "," as seperator
 }
 
 // A Virtual Directory endpoint, provide a subset of ProxyEndpoint for better

src/mod/email/email.go

@@ -42,17 +42,22 @@ SendEmail(
 )
 */
 func (s *Sender) SendEmail(to string, subject string, content string) error {
-	//Parse the email content
+	// Parse the email content
 	msg := []byte("To: " + to + "\n" +
 		"From: Zoraxy <" + s.SenderAddr + ">\n" +
 		"Subject: " + subject + "\n" +
 		"MIME-version: 1.0;\nContent-Type: text/html; charset=\"UTF-8\";\n\n" +
 		content + "\n\n")
 
-	//Login to the SMTP server
-	//Username can be username (e.g. admin) or email (e.g. admin@example.com), depending on SMTP service provider
-	auth := smtp.PlainAuth("", s.Username, s.Password, s.Hostname)
+	// Initialize the auth variable
+	var auth smtp.Auth
+	if s.Password != "" {
+		// Login to the SMTP server
+		// Username can be username (e.g. admin) or email (e.g. admin@example.com), depending on SMTP service provider
+		auth = smtp.PlainAuth("", s.Username, s.Password, s.Hostname)
+	}
 
+	// Send the email
 	err := smtp.SendMail(s.Hostname+":"+strconv.Itoa(s.Port), auth, s.SenderAddr, []string{to}, msg)
 	if err != nil {
 		return err

src/reverseproxy.go

@@ -1076,9 +1076,9 @@ func HandleCustomHeaderList(w http.ResponseWriter, r *http.Request) {
 
 // Add a new header to the target endpoint
 func HandleCustomHeaderAdd(w http.ResponseWriter, r *http.Request) {
-	epType, err := utils.PostPara(r, "type")
+	rewriteType, err := utils.PostPara(r, "type")
 	if err != nil {
-		utils.SendErrorResponse(w, "endpoint type not defined")
+		utils.SendErrorResponse(w, "rewriteType not defined")
 		return
 	}
 
@@ -1088,6 +1088,12 @@ func HandleCustomHeaderAdd(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	direction, err := utils.PostPara(r, "direction")
+	if err != nil {
+		utils.SendErrorResponse(w, "HTTP modifiy direction not set")
+		return
+	}
+
 	name, err := utils.PostPara(r, "name")
 	if err != nil {
 		utils.SendErrorResponse(w, "HTTP header name not set")
@@ -1095,26 +1101,46 @@ func HandleCustomHeaderAdd(w http.ResponseWriter, r *http.Request) {
 	}
 
 	value, err := utils.PostPara(r, "value")
-	if err != nil {
+	if err != nil && rewriteType == "add" {
 		utils.SendErrorResponse(w, "HTTP header value not set")
 		return
 	}
 
-	var targetProxyEndpoint *dynamicproxy.ProxyEndpoint
-	if epType == "root" {
-		targetProxyEndpoint = dynamicProxyRouter.Root
-	} else {
-		ep, err := dynamicProxyRouter.LoadProxy(domain)
-		if err != nil {
-			utils.SendErrorResponse(w, "target endpoint not exists")
-			return
-		}
+	targetProxyEndpoint, err := dynamicProxyRouter.LoadProxy(domain)
+	if err != nil {
+		utils.SendErrorResponse(w, "target endpoint not exists")
+		return
+	}
 
-		targetProxyEndpoint = ep
+	//Create a Custom Header Defination type
+	var rewriteDirection dynamicproxy.HeaderDirection
+	if direction == "toOrigin" {
+		rewriteDirection = dynamicproxy.HeaderDirection_ZoraxyToUpstream
+	} else if direction == "toClient" {
+		rewriteDirection = dynamicproxy.HeaderDirection_ZoraxyToDownstream
+	} else {
+		//Unknown direction
+		utils.SendErrorResponse(w, "header rewrite direction not supported")
+		return
+	}
+
+	isRemove := false
+	if rewriteType == "remove" {
+		isRemove = true
+	}
+	headerRewriteDefination := dynamicproxy.UserDefinedHeader{
+		Key:       name,
+		Value:     value,
+		Direction: rewriteDirection,
+		IsRemove:  isRemove,
 	}
 
 	//Create a new custom header object
-	targetProxyEndpoint.AddUserDefinedHeader(name, value)
+	err = targetProxyEndpoint.AddUserDefinedHeader(&headerRewriteDefination)
+	if err != nil {
+		utils.SendErrorResponse(w, "unable to add header rewrite rule: "+err.Error())
+		return
+	}
 
 	//Save it (no need reload as header are not handled by dpcore)
 	err = SaveReverseProxyConfig(targetProxyEndpoint)
@@ -1128,12 +1154,6 @@ func HandleCustomHeaderAdd(w http.ResponseWriter, r *http.Request) {
 
 // Remove a header from the target endpoint
 func HandleCustomHeaderRemove(w http.ResponseWriter, r *http.Request) {
-	epType, err := utils.PostPara(r, "type")
-	if err != nil {
-		utils.SendErrorResponse(w, "endpoint type not defined")
-		return
-	}
-
 	domain, err := utils.PostPara(r, "domain")
 	if err != nil {
 		utils.SendErrorResponse(w, "domain or matching rule not defined")
@@ -1146,20 +1166,17 @@ func HandleCustomHeaderRemove(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	var targetProxyEndpoint *dynamicproxy.ProxyEndpoint
-	if epType == "root" {
-		targetProxyEndpoint = dynamicProxyRouter.Root
-	} else {
-		ep, err := dynamicProxyRouter.LoadProxy(domain)
-		if err != nil {
-			utils.SendErrorResponse(w, "target endpoint not exists")
-			return
-		}
-
-		targetProxyEndpoint = ep
+	targetProxyEndpoint, err := dynamicProxyRouter.LoadProxy(domain)
+	if err != nil {
+		utils.SendErrorResponse(w, "target endpoint not exists")
+		return
 	}
 
-	targetProxyEndpoint.RemoveUserDefinedHeader(name)
+	err = targetProxyEndpoint.RemoveUserDefinedHeader(name)
+	if err != nil {
+		utils.SendErrorResponse(w, "unable to remove header rewrite rule: "+err.Error())
+		return
+	}
 
 	err = SaveReverseProxyConfig(targetProxyEndpoint)
 	if err != nil {

src/web/components/status.html

@@ -68,12 +68,13 @@
 <div class="standardContainer">
     <div class="ui divider"></div>
     <h4>Global Settings</h4>
-    <p>Inbound Port (Port to be proxied)</p>
+    <p>Inbound Port (Reverse Proxy Listening Port)</p>
     <div class="ui action fluid notloopbackOnly input">
+        <small id="applyButtonReminder">Click "Apply" button to confirm listening port changes</small>
         <input type="text" id="incomingPort" placeholder="Incoming Port" value="80">
-        <button class="ui basic notloopbackOnly button" onclick="handlePortChange();"><i class="ui green checkmark icon"></i> Apply</button>
+        <button class="ui green notloopbackOnly button" style="background: linear-gradient(60deg, #27e7ff, #00ca52);" onclick="handlePortChange();"><i class="ui checkmark icon"></i> Apply</button>
     </div>
-    <br>
+    <br><br>
     <div id="tls" class="ui toggle notloopbackOnly checkbox">
         <input type="checkbox">
         <label>Use TLS to serve proxy request</label>
@@ -160,6 +161,7 @@
 </div>
 <script>
     let loopbackProxiedInterface = false;
+    let currentListeningPort = 80;
     $(".advanceSettings").accordion();
 
     //Initial the start stop button if this is reverse proxied
@@ -176,6 +178,8 @@
     //Get the latest server status from proxy server
     function initRPStaste(){
         $.get("/api/proxy/status", function(data){
+            $("#incomingPort").off("change");
+
             if (data.Running == true){
                 $("#startbtn").addClass("disabled");
                 if (!loopbackProxiedInterface){
@@ -194,6 +198,15 @@
                 $("#serverstatus").removeClass("green");
             }
             $("#incomingPort").val(data.Option.Port);
+            currentListeningPort = data.Option.Port;
+            $("#incomingPort").on("change", function(){
+                let newPortValue = $("#incomingPort").val().trim();
+                if (currentListeningPort != newPortValue){
+                    $("#applyButtonReminder").show();
+                }else{
+                    $("#applyButtonReminder").hide();
+                }
+            });
             
         });
         
@@ -353,8 +366,11 @@
                 msgbox(data.error, false, 5000);
                 return;
             }
-            msgbox("Setting Updated");
+            msgbox("Listening Port Updated");
             initRPStaste();
+
+            //Hide the reminder text
+            $("#applyButtonReminder").hide();
         });
     }
 

src/web/components/streamprox.html

@@ -112,7 +112,6 @@
                     }
                     clearStreamProxyAddEditForm();
                     initProxyConfigList();
-                    $("#addproxyConfig").slideUp("fast");
                 },
                 error: function() {
                     msgbox('An error occurred while processing the request', false);
@@ -123,6 +122,7 @@
         function clearStreamProxyAddEditForm(){
             $('#streamProxyForm input, #streamProxyForm select').val('');
             $('#streamProxyForm select').dropdown('clear');
+            $("#streamProxyForm input[name=timeout]").val(10);
         }
 
         function cancelStreamProxyEdit(event=undefined) {
@@ -268,8 +268,6 @@
                     }
                 });
                 editingStreamProxyConfigUUID = configUUID;
-                $("#addproxyConfig").slideDown("fast");
-
             }else{
                 msgbox("Unable to load target config", false);
             }

src/web/components/utils.html

@@ -217,6 +217,7 @@
         $("#zoraxyinfo .uuid").text(data.NodeUUID);
         $("#zoraxyinfo .development").text(data.Development?"Development":"Release");
         $("#zoraxyinfo .version").text(data.Version);
+        $(".zrversion").text("v." + data.Version); //index footer
         $("#zoraxyinfo .boottime").text(timeConverter(data.BootTime) + ` ( ${secondsToDhms(parseInt(Date.now()/1000) - data.BootTime)} ago)`);
         $("#zoraxyinfo .zt").html(data.ZerotierConnected?`<i class="ui green check icon"></i> Connected`:`<i class="ui red times icon"></i> Link Error`);
         $("#zoraxyinfo .sshlb").html(data.EnableSshLoopback?`<i class="ui yellow exclamation triangle icon"></i> Enabled`:`Disabled`);
@@ -341,15 +342,6 @@
             form.find('input[name="username"]').parent().removeClass('error');
         }
 
-        // validate password
-        const password = form.find('input[name="password"]').val().trim();
-        if (password === '') {
-            form.find('input[name="password"]').parent().addClass('error');
-            isValid = false;
-        } else {
-            form.find('input[name="password"]').parent().removeClass('error');
-        }
-
         // validate sender address
         const senderAddr = form.find('input[name="senderAddr"]').val().trim();
         if (!emailRegex.test(senderAddr)) {

src/web/index.html

@@ -154,7 +154,7 @@
         <br><br>
         <div class="ui divider"></div>
         <div class="ui container" style="color: grey; font-size: 90%">
-            <p>CopyRight Zoraxy Project and its authors © 2021 - <span class="year"></span></p>
+            <p><a href="https://zoraxy.arozos.com" target="_blank">Zoraxy</a> <span class="zrversion"></span> © 2021 - <span class="year"></span> tobychui. Licensed under AGPL</p>
         </div>
         
         <div id="messageBox" class="ui green floating big compact message">

src/web/main.css

@@ -509,6 +509,16 @@ body{
     }
   }
 
+  /* Remind message for user forgetting to click Apply button*/
+  #applyButtonReminder{
+    position: absolute; 
+    bottom:-1.6em; 
+    left: 0; 
+    font-weight: bolder; 
+    color: #faac26; 
+    display:none;
+  }
+
 /*
   HTTP Proxy & Virtual Directory
 */

src/web/snippet/customHeaders.html

@@ -23,7 +23,7 @@
             <table class="ui very basic compacted unstackable celled table">
                 <thead>
                 <tr>
-                    <th>Name</th>
+                    <th>Key</th>
                     <th>Value</th>
                     <th>Remove</th>
                 </tr></thead>
@@ -34,18 +34,29 @@
                 </tbody>
             </table>
             <div class="ui divider"></div>
-            <h4>Add Custom Header</h4>
-            <p>Add custom header(s) into this proxy target</p>
+            <h4>Edit Custom Header</h4>
+            <p>Add or remove custom header(s) over this proxy target</p>
             <div class="scrolling content ui form">
-                <div class="three small fields credentialEntry">
-                    <div class="field">
-                        <input id="headerName" type="text" placeholder="X-Custom-Header" autocomplete="off">
+                <div class="five small fields credentialEntry">
+                    <div class="field" align="center">
+                        <button id="toOriginButton" title="Downstream to Upstream" class="ui circular basic active button">Zoraxy <i class="angle double right blue icon" style="margin-right: 0.4em;"></i> Origin</button>
+                        <button id="toClientButton" title="Upstream to Downstream" class="ui circular basic button">Client <i class="angle double left orange icon" style="margin-left: 0.4em;"></i> Zoraxy</button>
+                    </div>
+                    <div class="field" align="center">
+                        <button id="headerModeAdd" class="ui circular basic active button"><i class="ui green circle add icon"></i> Add Header</button>
+                        <button id="headerModeRemove" class="ui circular basic button"><i class="ui red circle times icon"></i> Remove Header</button>
                     </div>
                     <div class="field">
+                        <label>Header Key</label>
+                        <input id="headerName" type="text" placeholder="X-Custom-Header" autocomplete="off">
+                        <small>The header key is <b>NOT</b> case sensitive</small>
+                    </div>
+                    <div class="field">
+                        <label>Header Value</label>
                         <input id="headerValue" type="text" placeholder="value1,value2,value3" autocomplete="off">
                     </div>
                     <div class="field" >
-                        <button class="ui basic button" onclick="addCustomHeader();"><i class="green add icon"></i> Add Header</button>
+                        <button class="ui basic button" onclick="addCustomHeader();"><i class="green add icon"></i> Add Header Rewrite Rule</button>
                     </div>
                     <div class="ui divider"></div>
                 </div>
@@ -75,6 +86,47 @@
                 parent.hideSideWrapper(true);
             }
 
+            //Bind events to header mod mode
+            $("#headerModeAdd").on("click", function(){
+                $("#headerModeAdd").addClass("active");
+                $("#headerModeRemove").removeClass("active");
+                $("#headerValue").parent().show();
+            });
+
+            $("#headerModeRemove").on("click", function(){
+                $("#headerModeAdd").removeClass("active");
+                $("#headerModeRemove").addClass("active");
+                $("#headerValue").parent().hide();
+            });
+
+            //Bind events to header directions option
+            $("#toOriginButton").on("click", function(){
+                $("#toOriginButton").addClass("active");
+                $("#toClientButton").removeClass("active");
+            });
+
+            $("#toClientButton").on("click", function(){
+                $("#toOriginButton").removeClass("active");
+                $("#toClientButton").addClass("active");
+            });
+
+            //Return "add" or "remove" depending on mode user selected
+            function getHeaderEditMode(){
+                if ($("#headerModeAdd").hasClass("active")){
+                    return "add";
+                }
+
+                return "remove";
+            }
+
+            //Return "toOrigin" or "toClient"
+            function getHeaderDirection(){
+                if ($("#toOriginButton").hasClass("active")){
+                    return "toOrigin";
+                }
+                return "toClient";
+            }
+
             //$("#debug").text(JSON.stringify(editingEndpoint));
 
             function addCustomHeader(){
@@ -88,18 +140,21 @@
                     $("#headerName").parent().removeClass("error");
                 }
 
-                if (value == ""){
-                    $("#headerValue").parent().addClass("error");
-                    return
-                }else{
-                    $("#headerValue").parent().removeClass("error");
+                if (getHeaderEditMode() == "add"){
+                    if (value == ""){
+                        $("#headerValue").parent().addClass("error");
+                        return
+                    }else{
+                        $("#headerValue").parent().removeClass("error");
+                    }
                 }
 
                 $.ajax({
                     url: "/api/proxy/header/add",
                     data: {
-                        "type": editingEndpoint.ept,
+                        "type": getHeaderEditMode(),
                         "domain": editingEndpoint.ep,
+                        "direction":getHeaderDirection(),
                         "name": name,
                         "value": value
                     },
@@ -129,7 +184,7 @@
                 $.ajax({
                     url: "/api/proxy/header/remove",
                     data: {
-                        "type": editingEndpoint.ept,
+                        //"type": editingEndpoint.ept,
                         "domain": editingEndpoint.ep,
                         "name": name,
                     },
@@ -157,10 +212,16 @@
                            
                             $("#headerTable").html("");
                             data.forEach(header => {
+                                let editModeIcon = header.IsRemove?`<i class="ui red times circle icon"></i>`:`<i class="ui green add circle icon"></i>`;
+                                let direction = (header.Direction==0)?`<i class="angle double right blue icon"></i>`:`<i class="angle double left orange icon"></i>`;
+                                let valueField = header.Value;
+                                if (header.IsRemove){
+                                    valueField = "<small style='color: grey;'>(Field Removed)</small>";
+                                }
                                 $("#headerTable").append(`
                                 <tr>
-                                    <td>${header.Key}</td>
-                                    <td>${header.Value}</td>
+                                    <td>${direction} ${header.Key}</td>
+                                    <td>${editModeIcon} ${valueField}</td>
                                     <td><button class="ui basic circular mini red icon button" onclick="deleteCustomHeader('${header.Key}');"><i class="ui trash icon"></i></button></td>
                                 </tr>
                                 `);