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【GO】定义的ftp客户端库

作者:dezaicn / 发布于2015/9/14/ 1049

这是一个golang实现的ftp client的库，实现了简单的ftp操作，包括列表目录，上传、下载文件等等，可以参考。


	package ftp
	
	import (
	"fmt"
	"os"
	"net"
	"strconv"
	"strings"
	)
	
	type FTP struct {
	host string
	port int
	user string
	passwd string
	pasv int
	cmd string
	Code int
	Message string
	Debug bool
	stream []byte
	conn net.Conn
	Error os.Error
	}
	
	func (ftp *FTP) debugInfo(s string) {
	if ftp.Debug {
	fmt.Println(s)
	}
	}
	
	func (ftp *FTP) Connect(host string, port int) {
	addr := fmt.Sprintf("%s:%d", host, port)
	ftp.conn, ftp.Error = net.Dial("tcp", addr)
	ftp.Response()
	ftp.host = host
	ftp.port = port
	}
	
	func (ftp *FTP) Login(user, passwd string) {
	ftp.Request("USER " + user)
	ftp.Request("PASS " + passwd)
	ftp.user = user
	ftp.passwd = passwd
	}
	
	func (ftp *FTP) Response() (code int, message string) {
	ret := make([]byte, 1024)
	n, _ := ftp.conn.Read(ret)
	msg := string(ret[:n])
	code, _ = strconv.Atoi(msg[:3])
	message = msg[4 : len(msg)-2]
	ftp.debugInfo("<*cmd*> " + ftp.cmd)
	ftp.debugInfo(fmt.Sprintf("<*code*> %d", code))
	ftp.debugInfo("<*message*> " + message)
	return
	}
	
	func (ftp *FTP) Request(cmd string) {
	ftp.conn.Write([]byte(cmd + "\r\n"))
	ftp.cmd = cmd
	ftp.Code, ftp.Message = ftp.Response()
	if cmd == "PASV" {
	start, end := strings.Index(ftp.Message, "("), strings.Index(ftp.Message, ")")
	s := strings.Split(ftp.Message[start:end], ",", -1)
	l1, _ := strconv.Atoi(s[len(s)-2])
	l2, _ := strconv.Atoi(s[len(s)-1])
	ftp.pasv = l1*256 + l2
	}
	if (cmd != "PASV") && (ftp.pasv > 0) {
	ftp.Message = newRequest(ftp.host, ftp.pasv, ftp.stream)
	ftp.debugInfo("<*response*> " + ftp.Message)
	ftp.pasv = 0
	ftp.stream = nil
	ftp.Code, _ = ftp.Response()
	}
	}
	
	func (ftp *FTP) Pasv() {
	ftp.Request("PASV")
	}
	
	func (ftp *FTP) Pwd() {
	ftp.Request("PWD")
	}
	
	func (ftp *FTP) Cwd(path string) {
	ftp.Request("CWD " + path)
	}
	
	func (ftp *FTP) Mkd(path string) {
	ftp.Request("MKD " + path)
	}
	
	func (ftp *FTP) Size(path string) (size int) {
	ftp.Request("SIZE " + path)
	size, _ = strconv.Atoi(ftp.Message)
	return
	}
	
	func (ftp *FTP) List() {
	ftp.Pasv()
	ftp.Request("LIST")
	}
	
	func (ftp *FTP) Stor(file string, data []byte) {
	ftp.Pasv()
	if data != nil {
	ftp.stream = data
	}
	ftp.Request("STOR " + file)
	}
	
	func (ftp *FTP) Quit() {
	ftp.Request("QUIT")
	ftp.conn.Close()
	}
	
	// new connect to FTP pasv port, return data
	func newRequest(host string, port int, b []byte) string {
	conn, _ := net.Dial("tcp", fmt.Sprintf("%s:%d", host, port))
	defer conn.Close()
	if b != nil {
	conn.Write(b)
	return "OK"
	}
	ret := make([]byte, 4096)
	n, _ := conn.Read(ret)
	return string(ret[:n])
	}
	
	
	//该代码片段来自于: http://www.sharejs.com/codes/go/8663
	使用范例如下
	view sourceprint?
	import "fmt"
	import "os"
	import "io/ioutil"
	import "./ftp"
	
	func main() {
	 // new ftp
	 ftp := new(ftp.FTP)
	 // set debug, default false
	 ftp.Debug = true
	 // connect
	 ftp.Connect("10.0.0.0", 20)
	 // login
	 ftp.Login("smallfish", "****")
	 // login failure
	 if ftp.Code == 530 {
	 fmt.Println("error: login failure")
	 os.Exit(-1)
	 }
	 // pwd
	 ftp.Pwd()
	 fmt.Println("code:", ftp.Code, ", message:", ftp.Message)
	 // mkdir new dir
	 ftp.Mkd("/smallfish")
	 // stor new file
	 ftp.Request("TYPE I")
	 b, _ := ioutil.ReadFile("/path/a.txt")
	 ftp.Stor("/smallfish/a.txt", b)
	 // quit
	 ftp.Quit()
	}

试试其它关键字

　ftp　

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