diff --git a/internal/biz/handle/file.go b/internal/biz/handle/file.go
index 3c9d79b..9fd4fae 100644
--- a/internal/biz/handle/file.go
+++ b/internal/biz/handle/file.go
@@ -1,7 +1,17 @@
 package handle
 
 import (
+	"ai_scheduler/internal/data/constants"
 	"ai_scheduler/internal/entitys"
+	"ai_scheduler/internal/pkg/l_request"
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+	"path/filepath"
+	"strings"
+
+	"github.com/gabriel-vasile/mimetype"
 )
 
 // HandleRecognizeFile  这里的目的是无论将什么类型的file都转为二进制格式
@@ -12,3 +22,63 @@ func HandleRecognizeFile(file *entitys.RecognizeFile) {
 	//Todo 仲云
 	return
 }
+
+// 下载文件并返回二进制数据、MIME 类型
+func downloadFile(fileUrl string) (fileBytes []byte, contentType string, err error) {
+	if len(fileUrl) == 0 {
+		return
+	}
+	req := l_request.Request{
+		Method: "GET",
+		Url:    fileUrl,
+		Headers: map[string]string{
+			"User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36",
+			"Accept":     "image/webp,image/apng,image/*,*/*;q=0.8",
+		},
+	}
+	res, err := req.Send()
+	if err != nil {
+		return
+	}
+	var ex bool
+	if contentType, ex = res.Headers["Content-Type"]; !ex {
+		err = errors.New("Content-Type不存在")
+		return
+	}
+
+	if res.StatusCode != http.StatusOK {
+		err = fmt.Errorf("server returned non-200 status: %d", res.StatusCode)
+	}
+	fileBytes = res.Content
+
+	return fileBytes, contentType, nil
+}
+
+// detectFileType 判断文件类型
+func detectFileType(file io.ReadSeeker, filename string) constants.FileType {
+	// 1. 读取文件头检测 MIME
+	buffer := make([]byte, 512)
+	n, _ := file.Read(buffer)
+	file.Seek(0, io.SeekStart) // 重置读取位置
+
+	detectedMIME := mimetype.Detect(buffer[:n]).String()
+	for fileType, items := range constants.FileTypeMappings {
+		for _, item := range items {
+			if !strings.HasPrefix(item, ".") && item == detectedMIME {
+				return fileType
+			}
+		}
+	}
+
+	// 2. 备用：通过扩展名检测
+	ext := strings.ToLower(filepath.Ext(filename))
+	for fileType, items := range constants.FileTypeMappings {
+		for _, item := range items {
+			if strings.HasPrefix(item, ".") && item == ext {
+				return fileType
+			}
+		}
+	}
+
+	return constants.FileTypeUnknown
+}
diff --git a/internal/data/constants/file.go b/internal/data/constants/file.go
index a418959..132ad0e 100644
--- a/internal/data/constants/file.go
+++ b/internal/data/constants/file.go
@@ -1,11 +1,5 @@
 package constants
 
-import (
-	"github.com/gabriel-vasile/mimetype"
-	"io"
-	"strings"
-)
-
 type FileType string
 
 const (
@@ -42,34 +36,3 @@ var FileTypeMappings = map[FileType][]string{
 		".txt",
 	},
 }
-
-func DetectFileType(file io.ReadSeeker) (FileType, error) {
-	// 读取文件头（512字节足够检测大多数类型）
-	buffer := make([]byte, 512)
-	n, err := file.Read(buffer)
-	if err != nil && err != io.EOF {
-		return FileTypeUnknown, err
-	}
-
-	// 重置读取位置
-	if _, err := file.Seek(0, io.SeekStart); err != nil {
-		return FileTypeUnknown, err
-	}
-
-	// 检测 MIME 类型
-	detectedMIME := mimetype.Detect(buffer[:n]).String()
-
-	// 遍历映射表，匹配 MIME 或扩展名
-	for fileType, mimesOrExts := range FileTypeMappings {
-		for _, item := range mimesOrExts {
-			if strings.HasPrefix(item, ".") {
-				continue // 跳过扩展名（仅 MIME 检测）
-			}
-			if item == detectedMIME {
-				return fileType, nil
-			}
-		}
-	}
-
-	return FileTypeUnknown, nil
-}