feat(filex): 自 go-hua/common 迁入文件目录工具并独立成包

- 运行目录定位、路径存在性、带进度回调下载、Zip 打包/解压(兼容 GBK 中文文件名)
- 附单元测试、examples/filex 例程与包 README

filex/zip.go

@@ -0,0 +1,120 @@
+package filex
+
+import (
+	"archive/zip"
+	"bytes"
+	"golang.org/x/text/encoding/simplifiedchinese"
+	"golang.org/x/text/transform"
+	"io"
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+// Zip 打包成zip文件 可以是目录或单个文件
+func Zip(srcFile string, destZip string) error {
+	// 预防：旧文件无法覆盖
+	os.RemoveAll(destZip)
+
+	//创建zip文件
+	zipFile, err := os.Create(destZip)
+	if err != nil {
+		return err
+	}
+	defer zipFile.Close()
+
+	//打开zip文件
+	archive := zip.NewWriter(zipFile)
+	defer archive.Close()
+
+	//遍历目录
+	filepath.Walk(srcFile, func(path string, info os.FileInfo, err error) error {
+		//println(path)
+		if err != nil {
+			return err
+		}
+
+		header, err := zip.FileInfoHeader(info)
+		if err != nil {
+			return err
+		}
+
+		header.Name = strings.TrimPrefix(path, filepath.Dir(srcFile)+string(os.PathSeparator))
+		println(header.Name)
+		// header.Name = path
+		if info.IsDir() {
+			header.Name += "\\"
+		} else {
+			header.Method = zip.Deflate
+		}
+
+		writer, err := archive.CreateHeader(header)
+		if err != nil {
+			return err
+		}
+
+		if !info.IsDir() {
+			file, err := os.Open(path)
+			if err != nil {
+				return err
+			}
+			defer file.Close()
+			_, err = io.Copy(writer, file)
+			if err != nil {
+				return err
+			}
+		}
+		return err
+	})
+
+	return err
+}
+
+// Unzip 解压 zip 文件到指定目录（兼容 GBK 编码的中文文件名）
+func Unzip(zipFile string, destDir string) error {
+	zipReader, err := zip.OpenReader(zipFile)
+	if err != nil {
+		return err
+	}
+	defer zipReader.Close()
+
+	for _, f := range zipReader.File {
+		var decodeName string
+		if f.Flags == 0 {
+			//如果标致位是0  则是默认的本地编码   默认为gbk
+			i := bytes.NewReader([]byte(f.Name))
+			decoder := transform.NewReader(i, simplifiedchinese.GB18030.NewDecoder())
+			content, _ := io.ReadAll(decoder)
+			decodeName = string(content)
+		} else {
+			//如果标志为是 1 << 11也就是 2048  则是utf-8编码
+			decodeName = f.Name
+		}
+		fpath := filepath.Join(destDir, decodeName)
+		if f.FileInfo().IsDir() {
+			os.MkdirAll(fpath, os.ModePerm)
+		} else {
+			if err = os.MkdirAll(filepath.Dir(fpath), os.ModePerm); err != nil {
+				return err
+			}
+
+			inFile, err := f.Open()
+			if err != nil {
+				return err
+			}
+			defer inFile.Close()
+
+			outFile, err := os.OpenFile(fpath, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, f.Mode())
+			if err != nil {
+				return err
+			}
+			defer outFile.Close()
+
+			_, err = io.Copy(outFile, inFile)
+			if err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}