refactor(backend): update file info retrieval to use models package and improve file slice creation logic

backend/internal/controllers/file.go

@@ -27,7 +27,7 @@ func CreateUploadTask(c echo.Context) error {
 	}
 	rdb, ctx := utils.GetRedisClient()
 	fileId := service.GetFileId(r.FileHash, r.FileSize)
-	fileInfo, _ := service.GetRedisFileInfo(fileId)
+	fileInfo, _ := models.GetRedisFileInfo(fileId)
 
 	if fileInfo != (models.RedisFileInfo{}) {
 		return utils.HTTPSuccessHandler(c, map[string]any{
@@ -78,7 +78,7 @@ func UploadFileSlice(c echo.Context) error {
 	if r.FileId == "" || r.FileIndex == 0 || r.FileSlice == nil {
 		return utils.HTTPErrorHandler(c, errors.New("上传文件信息不完整"))
 	}
-	_, err := service.GetRedisFileInfo(r.FileId)
+	_, err := models.GetRedisFileInfo(r.FileId)
 
 	if err != nil {
 		return utils.HTTPErrorHandler(c, err)
@@ -127,7 +127,7 @@ func FinishUploadTask(c echo.Context) error {
 		return utils.HTTPErrorHandler(c, errors.New("文件ID不能为空"))
 	}
 
-	fileInfo, err := service.GetRedisFileInfo(r.FileId)
+	fileInfo, err := models.GetRedisFileInfo(r.FileId)
 	if err != nil {
 		return utils.HTTPErrorHandler(c, err)
 	}

backend/internal/models/file.go

@@ -1,5 +1,11 @@
 package models
 
+import (
+	"backend/internal/utils"
+	"encoding/json"
+	"errors"
+)
+
 type FileInfo struct {
 	FileSize int64  `json:"size"`
 	MimeType string `json:"mime_type"`
@@ -26,3 +32,17 @@ type RedisShareInfo struct {
 	FileId    string `json:"fileId"`
 	CreatedAt int64  `json:"created_at"`
 }
+
+func GetRedisFileInfo(fileId string) (RedisFileInfo, error) {
+	rdb, ctx := utils.GetRedisClient()
+	fileInfoUnmarshalData, _ := rdb.HGet(ctx, "015:fileInfoMap", fileId).Result()
+
+	if fileInfoUnmarshalData != "" {
+		var fileInfoData RedisFileInfo
+		if err := json.Unmarshal([]byte(fileInfoUnmarshalData), &fileInfoData); err != nil {
+			return RedisFileInfo{}, err
+		}
+		return fileInfoData, nil
+	}
+	return RedisFileInfo{}, errors.New("db不存在该文件信息")
+}

backend/internal/service/file.go

@@ -1,13 +1,8 @@
 package service
 
 import (
-	"backend/internal/models"
-	"backend/internal/utils"
-	"encoding/json"
-	"errors"
 	"fmt"
 	"io"
-	"mime/multipart"
 	"os"
 	"path/filepath"
 	"strconv"
@@ -29,31 +24,11 @@ func GetUploadDirPath() (string, error) {
 	return finalPath, nil
 }
 
-func GetRedisFileInfo(fileId string) (models.RedisFileInfo, error) {
-	rdb, ctx := utils.GetRedisClient()
-	fileInfoUnmarshalData, _ := rdb.HGet(ctx, "015:fileInfoMap", fileId).Result()
-
-	if fileInfoUnmarshalData != "" {
-		var fileInfoData models.RedisFileInfo
-		if err := json.Unmarshal([]byte(fileInfoUnmarshalData), &fileInfoData); err != nil {
-			return models.RedisFileInfo{}, err
-		}
-		return fileInfoData, nil
-	}
-	return models.RedisFileInfo{}, errors.New("db不存在该文件信息")
-}
-
 func GetFileId(fileHash string, fileSize int64) string {
 	return fmt.Sprintf("%s_%d", fileHash, fileSize)
 }
 
-func CreateFileSlice(fileSlice *multipart.FileHeader, fileId string, fileIndex int64) error {
-	src, err := fileSlice.Open()
-	if err != nil {
-		return err
-	}
-	defer src.Close()
-
+func CreateFileSlice(fileSlice io.Reader, fileId string, fileIndex int64) error {
 	uploadPath, err := GetUploadDirPath()
 	if err != nil {
 		return err
@@ -70,7 +45,7 @@ func CreateFileSlice(fileSlice *multipart.FileHeader, fileId string, fileIndex i
 	}
 	defer dst.Close()
 
-	if _, err = io.Copy(dst, src); err != nil {
+	if _, err = io.Copy(dst, fileSlice); err != nil {
 		return err
 	}