diff --git a/dir.go b/dir.go
new file mode 100755
index 0000000..97c394f
--- /dev/null
+++ b/dir.go
@@ -0,0 +1,50 @@
+package file
+
+import (
+	"strings"
+)
+
+func Substr(s string, pos, length int) string {
+	runes := []rune(s)
+	l := pos + length
+	if l > len(runes) {
+		l = len(runes)
+	}
+	return string(runes[pos:l])
+}
+
+func GetParentDirectory(dirctory, SEPARATOR string) string {
+
+	currentDir := strings.TrimRight(dirctory, SEPARATOR)
+
+	return Substr(currentDir, 0, strings.LastIndex(currentDir, SEPARATOR))
+}
+
+/**
+* 创建目录
+ */
+func CreatePath(path string) error {
+
+	DirStat, err := os.Stat(path)
+	if err != nil || !DirStat.IsDir() {
+		err := os.MkdirAll(path, 0755)
+		if err != nil {
+			log.Println("ERROR|", path, "目录创建失败", err)
+		}
+	}
+
+	//	_, err := os.Stat(path) //检查目录是否存在
+	//	if err != nil {
+	//		cmd := exec.Command("/bin/sh", "-c", "mkdir -p "+path)
+	//		if runtime.GOOS == "windows" {
+	//			cmd = exec.Command("cmd", "/C", "md "+path)
+	//		} else {
+
+	//		}
+
+	//		err := cmd.Run()
+
+	//		return err
+	//	}
+	return err
+}
diff --git a/download.go b/download.go
new file mode 100644
index 0000000..5745281
--- /dev/null
+++ b/download.go
@@ -0,0 +1,106 @@
+package file
+
+import (
+	"errors"
+	"io"
+	"net/http"
+	"os"
+	"strconv"
+)
+
+/**
+* 文件是否存在
+ */
+func IsFileExist(filename string, filesize int64) (bool, error) {
+	info, err := os.Stat(filename)
+	if os.IsNotExist(err) {
+		return false, err
+	}
+	if filesize == info.Size() {
+		// fmt.Println("已存在！", info.Name(), info.Size(), info.ModTime())
+		return true, nil
+	}
+	err = os.Remove(filename)
+
+	return false, err
+}
+
+/**
+* 文件下载
+* param url 要下载的文件URL
+* param localPath 文件保存路径（或文件保存名称）
+* fb 回调下载进度
+ */
+func DownProgress(url string, localPath string, fb func(length, downLen int64)) error {
+	var (
+		fsize   int64
+		buf     = make([]byte, 32*1024)
+		written int64
+	)
+	tmpFilePath := localPath + ".download"
+
+	//创建一个http client
+	client := new(http.Client)
+	//client.Timeout = time.Second * 60 //设置超时时间
+	//get方法获取资源
+	resp, err := client.Get(url)
+	if err != nil {
+		return err
+	}
+
+	//读取服务器返回的文件大小
+	fsize, err = strconv.ParseInt(resp.Header.Get("Content-Length"), 10, 32)
+	if err != nil {
+		// fmt.Println(err)
+	}
+	if IsFileExist(localPath, fsize) {
+		return err
+	}
+
+	//创建文件
+	file, err := os.Create(tmpFilePath)
+	if err != nil {
+		return err
+	}
+	defer file.Close()
+	if resp.Body == nil {
+		return errors.New("body is null")
+	}
+	defer resp.Body.Close()
+	//下面是 io.copyBuffer() 的简化版本
+	for {
+		//读取bytes
+		nr, er := resp.Body.Read(buf)
+		if nr > 0 {
+			//写入bytes
+			nw, ew := file.Write(buf[0:nr])
+			//数据长度大于0
+			if nw > 0 {
+				written += int64(nw)
+			}
+			//写入出错
+			if ew != nil {
+				err = ew
+				break
+			}
+			//读取是数据长度不等于写入的数据长度
+			if nr != nw {
+				err = io.ErrShortWrite
+				break
+			}
+		}
+		if er != nil {
+			if er != io.EOF {
+				err = er
+			}
+			break
+		}
+		//没有错误了快使用 callback
+		fb(fsize, written)
+	}
+	if err == nil {
+		file.Close()
+		err = os.Rename(tmpFilePath, localPath)
+	}
+	return err
+}
diff --git a/files.go b/files.go
new file mode 100755
index 0000000..3cc1908
--- /dev/null
+++ b/files.go
@@ -0,0 +1,191 @@
+// error debug
+package file
+
+import (
+	"errors"
+	"io"
+	"io/ioutil"
+	"net/http"
+	"os"
+
+	//"os/exec"
+	"path"
+	"path/filepath"
+
+	//"runtime"
+	"log"
+	"strings"
+)
+
+/**
+* 文件下载
+* param url 要下载的文件URL
+* param filename 文件保存路径（或文件保存名称）
+ */
+func DownloadFile(url, filename string) error {
+
+	if url == "" {
+		return errors.New("文件下载地址为空")
+	}
+	//判断filename是路径还是文件名
+	fileIndex := strings.Index(filename, ".")
+
+	var filePath string
+
+	if fileIndex < 1 { //名称是路径
+		index := strings.Index(url, "?")
+		if index > 0 {
+			url1 := url[0:index]
+			index2 := strings.LastIndex(url1, "/")
+			//修改此处index2为index2+1,不然多了一个多余的/
+			fileName := url1[index2+1:]
+			filePath = strings.TrimRight(filename, "/") + "/" + fileName
+		} else {
+			fileName := path.Base(url) //获取文件名带后缀
+			filePath = strings.TrimRight(filename, "/") + "/" + fileName
+		}
+	} else {
+		filePath = filename
+	}
+
+	res, err := http.Get(url)
+	if err != nil {
+		return err
+	}
+
+	dir, _ := filepath.Split(filePath)
+
+	CreatePath(dir)
+
+	file, err := os.Create(filePath)
+	if err != nil {
+		return err
+	}
+
+	_, copyerr := io.Copy(file, res.Body)
+	if copyerr != nil {
+		return err
+	}
+	return nil
+}
+
+/**
+ * 获取远程接口信息
+ */
+func Geturl(url string) ([]byte, error) {
+
+	resp, err := http.Get(url)
+	if err != nil {
+		return []byte(""), err
+	}
+
+	defer resp.Body.Close()
+	body, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		return []byte(""), err
+	}
+	return body, nil
+}
+
+/**
+* 文件是否存在
+ */
+func FileExists(path string) (bool, error) {
+	_, err := os.Stat(path)
+	if err == nil {
+		return true, nil
+	}
+	if os.IsNotExist(err) {
+		return false, nil
+	}
+	return false, err
+}
+
+// Copy a file
+func Cpfile(originalFilePath, newFilePath string) error {
+	// Open original file
+	originalFile, err := os.Open(originalFilePath)
+
+	if err != nil {
+		return err
+	}
+
+	defer originalFile.Close()
+
+	// Create new file
+	newFile, err := os.Create(newFilePath)
+
+	if err != nil {
+		return err
+	}
+
+	defer newFile.Close()
+
+	// Copy the bytes to destination from source
+	_, err = io.Copy(newFile, originalFile)
+
+	if err != nil {
+		return err
+	}
+
+	// Commit the file contents
+	// Flushes memory to disk
+	err = newFile.Sync()
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+func WriteFile(filePath, data string) error {
+
+	fileExist, err := FileExists(filePath)
+	if err != nil {
+		return err
+	}
+
+	var f *os.File
+
+	if fileExist { //如果文件存在
+		f, err = os.OpenFile(filePath, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0644) //打开文件
+	} else {
+		f, err = os.Create(filePath) //创建文件
+	}
+	if err != nil {
+		return err
+	}
+
+	_, err = io.WriteString(f, data) //写入文件(字符串)
+	if err != nil {
+		return err
+	}
+	return nil
+
+}
+
+/**
+* read file
+ */
+func ReadFile(path string) string {
+	fi, err := os.Open(path)
+	if err != nil {
+		return ""
+	}
+	defer fi.Close()
+	fd, err := ioutil.ReadAll(fi)
+	return string(fd)
+}
+
+/**
+ *读取文件内容(返回字符串)
+ */
+func GetFileContent(FilePath string) string {
+
+	buf, err := ioutil.ReadFile(FilePath)
+	if err != nil {
+		log.Println("ERROR", "read file error", FilePath, err)
+		return ""
+	}
+
+	return string(buf)
+}