Enhance docker logging for debugging (Python unbuffered, GORM logger, yt-dlp debug wrapper)

Dockerfile

@@ -11,6 +11,9 @@ RUN cd backend && CGO_ENABLED=1 go build -o /app/main main.go
 # 2. Final Minimal Image (Python + Go binary + Frontend)
 FROM python:3.10-slim
 
+# 파이썬 출력 버퍼링을 비활성화하여 도커 로그에 즉각 표시되도록 설정합니다.
+ENV PYTHONUNBUFFERED=1
+
 # Install system dependencies (ffmpeg is required for yt-dlp)
 RUN apt-get update && apt-get install -y \
     ffmpeg \

backend/handlers/api.go

@@ -106,10 +106,13 @@ func DownloadMedia(c *fiber.Ctx) error {
 		}
 
 		cmd := exec.Command("python", args...)
+		fmt.Printf("[DEBUG Go Exec] Command: %v\n", cmd.String())
+		
 		output, err := cmd.CombinedOutput()
+		fmt.Printf("[DEBUG Go Exec] Output:\n%s\n", string(output))
 		
 		if err != nil {
-			fmt.Println("Download error:", string(output))
+			fmt.Printf("[DEBUG Go Exec] Download error: %v\n", string(output))
 			BroadcastProgress("Error: " + err.Error())
 			models.DB.Create(&models.MediaHistory{
 				SourceURL: req.URL,

backend/models/db.go

@@ -2,9 +2,11 @@ package models
 
 import (
 	"log"
+	"os"
 
 	"gorm.io/driver/sqlite"
 	"gorm.io/gorm"
+	"gorm.io/gorm/logger"
 )
 
 var DB *gorm.DB
@@ -19,8 +21,20 @@ type MediaHistory struct {
 
 func InitDB(dbPath string) {
 	var err error
+	
+	// 도커 로그 디버깅을 위해 SQL 쿼리를 디테일하게 출력하는 로거 설정
+	newLogger := logger.New(
+		log.New(os.Stdout, "\r\n", log.LstdFlags),
+		logger.Config{
+			LogLevel: logger.Info,
+			Colorful: true,
+		},
+	)
+
 	log.Println("Connecting to SQLite at:", dbPath)
-	DB, err = gorm.Open(sqlite.Open(dbPath), &gorm.Config{})
+	DB, err = gorm.Open(sqlite.Open(dbPath), &gorm.Config{
+		Logger: newLogger,
+	})
 	if err != nil {
 		log.Fatal("Failed to connect to database:", err)
 	}

worker/downloader.py

@@ -3,13 +3,16 @@ import json
 import subprocess
 import os
 import argparse
+import traceback
 
 def download_and_crop(url, output_dir, start_time=None, end_time=None):
+    print(f"[DEBUG Worker] Starting download job for URL={url}, start={start_time}, end={end_time}", file=sys.stderr)
     try:
         os.makedirs(output_dir, exist_ok=True)
         
         # Get video info
         info_cmd = ["yt-dlp", "-J", url]
+        print(f"[DEBUG Worker] Running info command: {' '.join(info_cmd)}", file=sys.stderr)
         result = subprocess.run(info_cmd, capture_output=True, text=True, check=True)
         info = json.loads(result.stdout)
         
@@ -53,14 +56,18 @@ def download_and_crop(url, output_dir, start_time=None, end_time=None):
             ]
 
         # Execute
+        print(f"[DEBUG Worker] Executing download command: {' '.join(download_args)}", file=sys.stderr)
         subprocess.run(download_args, check=True)
         
         print(json.dumps({"status": "success", "filepath": filepath, "title": title}))
         return True
     except subprocess.CalledProcessError as e:
+        print(f"[DEBUG Worker] Command Error Output: {e.stderr or e.output}", file=sys.stderr)
         print(json.dumps({"status": "error", "message": f"Command failed: {e.stderr or e.output}"}))
         return False
     except Exception as e:
+        print(f"[DEBUG Worker] Unexpected Exception:", file=sys.stderr)
+        traceback.print_exc()
         print(json.dumps({"status": "error", "message": str(e)}))
         return False