refactor health module

internal/watcher/health/monitor/raw.go

@@ -0,0 +1,45 @@
+package monitor
+
+import (
+	"net"
+
+	"github.com/yusing/go-proxy/internal/net/types"
+	"github.com/yusing/go-proxy/internal/watcher/health"
+)
+
+type (
+	RawHealthMonitor struct {
+		*monitor
+		dialer *net.Dialer
+	}
+)
+
+func NewRawHealthMonitor(url types.URL, config *health.HealthCheckConfig) *RawHealthMonitor {
+	mon := new(RawHealthMonitor)
+	mon.monitor = newMonitor(url, config, mon.CheckHealth)
+	mon.dialer = &net.Dialer{
+		Timeout:       config.Timeout,
+		FallbackDelay: -1,
+	}
+	return mon
+}
+
+func NewRawHealthChecker(url types.URL, config *health.HealthCheckConfig) health.HealthChecker {
+	return NewRawHealthMonitor(url, config)
+}
+
+func (mon *RawHealthMonitor) CheckHealth() (healthy bool, detail string, err error) {
+	ctx, cancel := mon.ContextWithTimeout("ping request timed out")
+	defer cancel()
+
+	url := mon.url.Load()
+	conn, dialErr := mon.dialer.DialContext(ctx, url.Scheme, url.Host)
+	if dialErr != nil {
+		detail = dialErr.Error()
+		/* trunk-ignore(golangci-lint/nilerr) */
+		return
+	}
+	conn.Close()
+	healthy = true
+	return
+}