feat(storage): 实现本地存储功能，包括文件上传和下载接口

backend/app/http/v1/storage.go

@@ -0,0 +1,84 @@
+package v1
+
+import (
+	"io"
+	"os"
+	"path/filepath"
+
+	"quyun/v2/app/services"
+
+	"github.com/gofiber/fiber/v3"
+)
+
+// @provider
+type Storage struct{}
+
+// Upload file
+//
+// @Router /v1/storage/:key [put]
+// @Summary Upload file
+// @Tags Storage
+// @Accept octet-stream
+// @Produce json
+// @Param key path string true "Object Key"
+// @Param expires query string true "Expiry"
+// @Param sign query string true "Signature"
+// @Success 200 {string} string "success"
+// @Bind key path key(key)
+// @Bind expires query
+// @Bind sign query
+func (s *Storage) Upload(ctx fiber.Ctx, key, expires, sign string) (string, error) {
+	if err := services.Storage.Verify("PUT", key, expires, sign); err != nil {
+		return "", fiber.NewError(fiber.StatusForbidden, err.Error())
+	}
+
+	// Save file
+	localPath := services.Storage.Config.LocalPath
+	if localPath == "" {
+		localPath = "./storage"
+	}
+	fullPath := filepath.Join(localPath, key)
+	if err := os.MkdirAll(filepath.Dir(fullPath), 0o755); err != nil {
+		return "", err
+	}
+
+	f, err := os.Create(fullPath)
+	if err != nil {
+		return "", err
+	}
+	defer f.Close()
+
+	if _, err := io.Copy(f, ctx.Request().BodyStream()); err != nil {
+		return "", err
+	}
+
+	return "success", nil
+}
+
+// Download file
+//
+// @Router /v1/storage/:key [get]
+// @Summary Download file
+// @Tags Storage
+// @Accept json
+// @Produce octet-stream
+// @Param key path string true "Object Key"
+// @Param expires query string true "Expiry"
+// @Param sign query string true "Signature"
+// @Success 200 {file} file
+// @Bind key path key(key)
+// @Bind expires query
+// @Bind sign query
+func (s *Storage) Download(ctx fiber.Ctx, key, expires, sign string) error {
+	if err := services.Storage.Verify("GET", key, expires, sign); err != nil {
+		return fiber.NewError(fiber.StatusForbidden, err.Error())
+	}
+
+	localPath := services.Storage.Config.LocalPath
+	if localPath == "" {
+		localPath = "./storage"
+	}
+	fullPath := filepath.Join(localPath, key)
+
+	return ctx.SendFile(fullPath)
+}