修改BUG

infrastructure/storage/local_storage.go

@@ -3,8 +3,10 @@ package storage
 import (
 	"fmt"
 	"io"
+	"net/http"
 	"os"
 	"path/filepath"
+	"strings"
 	"time"
 )
 
@@ -55,3 +57,81 @@ func (s *LocalStorage) Delete(url string) error {
 func (s *LocalStorage) GetURL(path string) string {
 	return fmt.Sprintf("%s/%s", s.baseURL, path)
 }
+
+// DownloadFromURL 从远程URL下载文件到本地存储
+func (s *LocalStorage) DownloadFromURL(url, category string) (string, error) {
+	// 发送HTTP请求下载文件
+	resp, err := http.Get(url)
+	if err != nil {
+		return "", fmt.Errorf("failed to download file: %w", err)
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		return "", fmt.Errorf("failed to download file: HTTP %d", resp.StatusCode)
+	}
+
+	// 从URL或Content-Type推断文件扩展名
+	ext := getFileExtension(url, resp.Header.Get("Content-Type"))
+
+	// 创建目录
+	dir := filepath.Join(s.basePath, category)
+	if err := os.MkdirAll(dir, 0755); err != nil {
+		return "", fmt.Errorf("failed to create category directory: %w", err)
+	}
+
+	// 生成唯一文件名
+	timestamp := time.Now().Format("20060102_150405_000")
+	filename := fmt.Sprintf("%s%s", timestamp, ext)
+	filePath := filepath.Join(dir, filename)
+
+	// 保存文件
+	dst, err := os.Create(filePath)
+	if err != nil {
+		return "", fmt.Errorf("failed to create file: %w", err)
+	}
+	defer dst.Close()
+
+	if _, err := io.Copy(dst, resp.Body); err != nil {
+		return "", fmt.Errorf("failed to save file: %w", err)
+	}
+
+	// 返回本地URL
+	localURL := fmt.Sprintf("%s/%s/%s", s.baseURL, category, filename)
+	return localURL, nil
+}
+
+// getFileExtension 从URL或Content-Type推断文件扩展名
+func getFileExtension(url, contentType string) string {
+	// 首先尝试从URL获取扩展名
+	if idx := strings.LastIndex(url, "."); idx != -1 {
+		ext := url[idx:]
+		// 只取扩展名部分，忽略查询参数
+		if qIdx := strings.Index(ext, "?"); qIdx != -1 {
+			ext = ext[:qIdx]
+		}
+		if len(ext) <= 5 { // 合理的扩展名长度
+			return ext
+		}
+	}
+
+	// 根据Content-Type推断扩展名
+	switch {
+	case strings.Contains(contentType, "image/jpeg"):
+		return ".jpg"
+	case strings.Contains(contentType, "image/png"):
+		return ".png"
+	case strings.Contains(contentType, "image/gif"):
+		return ".gif"
+	case strings.Contains(contentType, "image/webp"):
+		return ".webp"
+	case strings.Contains(contentType, "video/mp4"):
+		return ".mp4"
+	case strings.Contains(contentType, "video/webm"):
+		return ".webm"
+	case strings.Contains(contentType, "video/quicktime"):
+		return ".mov"
+	default:
+		return ".bin"
+	}
+}