优化kit/zip

Signed-off-by: lixxxww <941403820@qq.com>

kit/file/file.go

@@ -0,0 +1,45 @@
+package utilFile
+
+import (
+	"io"
+	"mime/multipart"
+	"net/http"
+	"os"
+)
+
+// DownloadFile 会将url下载到本地文件，它会在下载时写入，而不是将整个文件加载到内存中。
+func DownloadFile(url, filepath string) error {
+	// Get the data
+	resp, err := http.Get(url)
+	if err != nil {
+		return err
+	}
+	defer resp.Body.Close()
+
+	// Create the file
+	out, err := os.Create(filepath)
+	if err != nil {
+		return err
+	}
+	defer out.Close()
+	// Write the body to file
+	_, err = io.Copy(out, resp.Body)
+	return err
+}
+
+func SaveUploadedFile(file *multipart.FileHeader, dst string) error {
+	src, err := file.Open()
+	if err != nil {
+		return err
+	}
+	defer src.Close()
+
+	out, err := os.Create(dst)
+	if err != nil {
+		return err
+	}
+	defer out.Close()
+
+	_, err = io.Copy(out, src)
+	return err
+}