add host_header_rewrite in frpc.ini to rewrite your requests with a modified Host header

src/frp/models/client/config.go

@@ -140,6 +140,14 @@ func LoadConf(confFile string) (err error) {
 				proxyClient.UseGzip = true
 			}
 
+			if proxyClient.Type == "http" {
+				// host_header_rewrite
+				tmpStr, ok = section["host_header_rewrite"]
+				if ok {
+					proxyClient.HostHeaderRewrite = tmpStr
+				}
+			}
+
 			// privilege_mode
 			proxyClient.PrivilegeMode = false
 			tmpStr, ok = section["privilege_mode"]
@@ -167,6 +175,7 @@ func LoadConf(confFile string) (err error) {
 						return fmt.Errorf("Parse conf error: proxy [%s] remote_port not found", proxyClient.Name)
 					}
 				} else if proxyClient.Type == "http" {
+					// custom_domains
 					domainStr, ok := section["custom_domains"]
 					if ok {
 						proxyClient.CustomDomains = strings.Split(domainStr, ",")
@@ -180,6 +189,7 @@ func LoadConf(confFile string) (err error) {
 						return fmt.Errorf("Parse conf error: proxy [%s] custom_domains must be set when type equals http", proxyClient.Name)
 					}
 				} else if proxyClient.Type == "https" {
+					// custom_domains
 					domainStr, ok := section["custom_domains"]
 					if ok {
 						proxyClient.CustomDomains = strings.Split(domainStr, ",")

src/frp/models/config/config.go

@@ -15,14 +15,12 @@
 package config
 
 type BaseConf struct {
-	Name           string
-	AuthToken      string
-	Type           string
-	UseEncryption  bool
-	UseGzip        bool
-	PrivilegeMode  bool
-	PrivilegeToken string
-	ClientIp       string
-	ClientPort     int64
-	ServerPort     int64
+	Name              string
+	AuthToken         string
+	Type              string
+	UseEncryption     bool
+	UseGzip           bool
+	PrivilegeMode     bool
+	PrivilegeToken    string
+	HostHeaderRewrite string
 }

src/frp/models/msg/msg.go

@@ -26,16 +26,15 @@ type ControlReq struct {
 	AuthKey       string `json:"auth_key"`
 	UseEncryption bool   `json:"use_encryption"`
 	UseGzip       bool   `json:"use_gzip"`
-	LocalIp       string `json:"local_ip"`
-	LocalPort     int64  `json:"local_port"`
 
 	// configures used if privilege_mode is enabled
-	PrivilegeMode bool     `json:"privilege_mode"`
-	PrivilegeKey  string   `json:"privilege_key"`
-	ProxyType     string   `json:"proxy_type"`
-	RemotePort    int64    `json:"remote_port"`
-	CustomDomains []string `json:"custom_domains, omitempty"`
-	Timestamp     int64    `json:"timestamp"`
+	PrivilegeMode     bool     `json:"privilege_mode"`
+	PrivilegeKey      string   `json:"privilege_key"`
+	ProxyType         string   `json:"proxy_type"`
+	RemotePort        int64    `json:"remote_port"`
+	CustomDomains     []string `json:"custom_domains, omitempty"`
+	HostHeaderRewrite string   `json:"host_header_rewrite"`
+	Timestamp         int64    `json:"timestamp"`
 }
 
 type ControlRes struct {

src/frp/models/server/server.go

@@ -64,7 +64,7 @@ func NewProxyServerFromCtlMsg(req *msg.ControlReq) (p *ProxyServer) {
 	p.BindAddr = BindAddr
 	p.ListenPort = req.RemotePort
 	p.CustomDomains = req.CustomDomains
-	p.ServerPort = VhostHttpPort
+	p.HostHeaderRewrite = req.HostHeaderRewrite
 	return
 }
 
@@ -80,7 +80,7 @@ func (p *ProxyServer) Init() {
 
 func (p *ProxyServer) Compare(p2 *ProxyServer) bool {
 	if p.Name != p2.Name || p.AuthToken != p2.AuthToken || p.Type != p2.Type ||
-		p.BindAddr != p2.BindAddr || p.ListenPort != p2.ListenPort {
+		p.BindAddr != p2.BindAddr || p.ListenPort != p2.ListenPort || p.HostHeaderRewrite != p2.HostHeaderRewrite {
 		return false
 	}
 	if len(p.CustomDomains) != len(p2.CustomDomains) {
@@ -114,7 +114,7 @@ func (p *ProxyServer) Start(c *conn.Conn) (err error) {
 		p.listeners = append(p.listeners, l)
 	} else if p.Type == "http" {
 		for _, domain := range p.CustomDomains {
-			l, err := VhostHttpMuxer.Listen(domain, p.Type, p.ClientIp, p.ClientPort, p.ServerPort)
+			l, err := VhostHttpMuxer.Listen(domain, p.HostHeaderRewrite)
 			if err != nil {
 				return err
 			}
@@ -122,7 +122,7 @@ func (p *ProxyServer) Start(c *conn.Conn) (err error) {
 		}
 	} else if p.Type == "https" {
 		for _, domain := range p.CustomDomains {
-			l, err := VhostHttpsMuxer.Listen(domain, p.Type, p.ClientIp, p.ClientPort, p.ServerPort)
+			l, err := VhostHttpsMuxer.Listen(domain, p.HostHeaderRewrite)
 			if err != nil {
 				return err
 			}