add workflow to build

internal/health/health.go

@@ -0,0 +1,74 @@
+package health
+
+import (
+	"net"
+	"net/http"
+	"os/exec"
+	"strings"
+	"time"
+
+	"github.com/labstack/echo/v4"
+)
+
+type Checker struct {
+	YtdlpPath string
+	ProxyURL  string
+}
+
+type HealthResponse struct {
+	Status    string    `json:"status"`
+	Ytdlp     string    `json:"ytdlp"`
+	Byedpi    string    `json:"byedpi"`
+	Uptime    string    `json:"uptime"`
+	StartTime time.Time `json:"-"`
+}
+
+func NewChecker(ytdlpPath, proxyURL string) *Checker {
+	return &Checker{
+		YtdlpPath: ytdlpPath,
+		ProxyURL:  proxyURL,
+	}
+}
+
+func (c *Checker) Handler(startTime time.Time) echo.HandlerFunc {
+	return func(ctx echo.Context) error {
+		resp := HealthResponse{
+			Status:    "ok",
+			StartTime: startTime,
+			Uptime:    time.Since(startTime).Round(time.Second).String(),
+		}
+
+		// Check yt-dlp
+		if err := exec.Command(c.YtdlpPath, "--version").Run(); err != nil {
+			resp.Status = "degraded"
+			resp.Ytdlp = "unavailable"
+		} else {
+			resp.Ytdlp = "ok"
+		}
+
+		// Check proxy (ByeByeDPI) — we check if we can resolve the host
+		// A real check would connect via SOCKS5, but for MVP TCP check is enough
+		if strings.Contains(c.ProxyURL, "localhost:1080") || strings.Contains(c.ProxyURL, "byedpi:1080") {
+			// Quick TCP dial check
+			proxyHost := "localhost:1080"
+			if strings.Contains(c.ProxyURL, "byedpi") {
+				proxyHost = "byedpi:1080"
+			}
+			conn, err := net.DialTimeout("tcp", proxyHost, 2*time.Second)
+			if err != nil {
+				resp.Status = "degraded"
+				resp.Byedpi = "unreachable"
+			} else {
+				conn.Close()
+				resp.Byedpi = "ok"
+			}
+		} else {
+			resp.Byedpi = "disabled"
+		}
+
+		if resp.Status != "ok" {
+			return ctx.JSON(http.StatusServiceUnavailable, resp)
+		}
+		return ctx.JSON(http.StatusOK, resp)
+	}
+}