client/health/health.go

@@ -42,6 +42,7 @@ type Monitor struct {
 	// For http
 	url            string
 	header         http.Header
+	host           string
 	failedTimes    uint64
 	statusOK       bool
 	statusNormalFn func()
@@ -74,7 +75,7 @@ func NewMonitor(ctx context.Context, cfg v1.HealthCheckConfig, addr string,
 		url = s + cfg.Path
 	}
 	header := make(http.Header)
-	for _, h := range cfg.HTTPHeaders {
+	for _, h := range cfg.Headers {
 		header.Set(h.Name, h.Value)
 	}
 
@@ -86,6 +87,7 @@ func NewMonitor(ctx context.Context, cfg v1.HealthCheckConfig, addr string,
 		addr:           addr,
 		url:            url,
 		header:         header,
+		host:           cfg.HostHeaderRewrite,
 		statusOK:       false,
 		statusNormalFn: statusNormalFn,
 		statusFailedFn: statusFailedFn,
@@ -170,7 +172,7 @@ func (monitor *Monitor) doHTTPCheck(ctx context.Context) error {
 		return err
 	}
 	req.Header = monitor.header
-	req.Host = monitor.header.Get("Host")
+	req.Host = monitor.host
 	resp, err := http.DefaultClient.Do(req)
 	if err != nil {
 		return err

conf/frpc_full_example.toml

@@ -217,9 +217,10 @@ healthCheck.intervalSeconds = 10
 healthCheck.maxFailed = 3
 healthCheck.timeoutSeconds = 3
 # set health check headers
-healthCheck.httpheaders=[
+healthCheck.headers=[
     { name = "x-from-where", value = "frp" }
 ]
+healthCheck.hostHeaderRewrite = "example.com"
 
 [[proxies]]
 name = "web02"

pkg/config/v1/proxy.go

@@ -99,7 +99,10 @@ type HealthCheckConfig struct {
 	Path string `json:"path,omitempty"`
 	// Headers specifies the headers to send health checks to if the
 	// health check type is "http".
-	HTTPHeaders []HTTPHeader `json:"httpHeaders,omitempty"`
+	Headers []HTTPHeader `json:"headers,omitempty"`
+	// HostHeaderRewrite specifies the request host to send health checks to if the
+	// health check type is "http".
+	HostHeaderRewrite string `json:"hostHeaderRewrite,omitempty"`
 }
 
 type DomainConfig struct {