feat: base go mkiso

internal/handler/health.go

@@ -0,0 +1,69 @@
+package handler
+
+import (
+	"encoding/json"
+	"net/http"
+	"os/exec"
+
+	"mkiso-server/internal/config"
+	"mkiso-server/pkg/dicom"
+)
+
+// Health returns a handler that checks and reports the status of
+// all external dependencies.
+func Health(cfg *config.Config) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		deps := []struct {
+			Name   string `json:"name"`
+			Path   string `json:"path"`
+			Status string `json:"status"`
+		}{
+			{"storescp", cfg.DCMTK.Storescp, ""},
+			{"movescu", cfg.DCMTK.Movescu, ""},
+			{"storescu", cfg.DCMTK.Storescu, ""},
+		}
+
+		allOK := true
+		for i, dep := range deps {
+			if dep.Path == "" {
+				deps[i].Status = "not configured"
+				allOK = false
+				continue
+			}
+			if dicom.FileExists(dep.Path) {
+				// Quick check: can we execute it?
+				cmd := exec.Command(dep.Path, "--version")
+				if err := cmd.Run(); err == nil {
+					deps[i].Status = "ok"
+				} else {
+					deps[i].Status = "executable not found"
+					allOK = false
+				}
+			} else {
+				deps[i].Status = "file not found"
+				allOK = false
+			}
+		}
+
+		// Check microdicom path
+		microdicomOK := dicom.DirExists(cfg.ISO.MicrodicomPath)
+
+		response := map[string]interface{}{
+			"status":            "ok",
+			"dependencies":      deps,
+			"microdicom_path":   cfg.ISO.MicrodicomPath,
+			"microdicom_exists": microdicomOK,
+			"auth_enabled":      cfg.Auth.Enabled,
+		}
+
+		statusCode := http.StatusOK
+		if !allOK {
+			response["status"] = "degraded"
+			statusCode = http.StatusOK // still return 200, status field indicates degraded
+		}
+
+		w.Header().Set("Content-Type", "application/json")
+		w.WriteHeader(statusCode)
+		json.NewEncoder(w).Encode(response)
+	}
+}