using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.IO;
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using System.Net;
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using System.Net.Sockets;
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using System.Text.RegularExpressions;
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using System.Collections;
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namespace CY.Infrastructure.FTP
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{
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/// <summary>
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/// FTP类
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/// </summary>
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public class FTP
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{
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#region 变量声明
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/// <summary>
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/// 服务器连接地址
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/// </summary>
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public string server;
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/// <summary>
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/// 登陆帐号
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/// </summary>
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public string user;
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/// <summary>
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/// 登陆口令
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/// </summary>
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public string pass;
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/// <summary>
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/// 端口号
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/// </summary>
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public int port;
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/// <summary>
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/// 无响应时间（FTP在指定时间内无响应）
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/// </summary>
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public int timeout;
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/// <summary>
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/// 服务器错误状态信息
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/// </summary>
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public string errormessage;
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/// <summary>
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/// 服务器状态返回信息
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/// </summary>
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private string messages;
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/// <summary>
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/// 服务器的响应信息
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/// </summary>
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private string responseStr;
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/// <summary>
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/// 链接模式（主动或被动，默认为被动）
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/// </summary>
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private bool passive_mode;
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/// <summary>
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/// 上传或下载信息字节数
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/// </summary>
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private long bytes_total;
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/// <summary>
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/// 上传或下载的文件大小
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/// </summary>
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private long file_size;
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/// <summary>
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/// 主套接字
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/// </summary>
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private Socket main_sock;
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/// <summary>
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/// 要链接的网络地址终结点
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/// </summary>
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private IPEndPoint main_ipEndPoint;
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/// <summary>
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/// 侦听套接字
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/// </summary>
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private Socket listening_sock;
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/// <summary>
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/// 数据套接字
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/// </summary>
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private Socket data_sock;
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/// <summary>
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/// 要链接的网络数据地址终结点
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/// </summary>
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private IPEndPoint data_ipEndPoint;
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/// <summary>
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/// 用于上传或下载的文件流对象
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/// </summary>
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private FileStream file;
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/// <summary>
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/// 与FTP服务器交互的状态值
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/// </summary>
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private int response;
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/// <summary>
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/// 读取并保存当前命令执行后从FTP服务器端返回的数据信息
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/// </summary>
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private string bucket;
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#endregion
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#region 构造函数
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/// <summary>
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/// 构造函数
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/// </summary>
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public FTP()
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{
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server = null;
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user = null;
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pass = null;
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port = 21;
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passive_mode = true;
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main_sock = null;
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main_ipEndPoint = null;
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listening_sock = null;
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data_sock = null;
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data_ipEndPoint = null;
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file = null;
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bucket = "";
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bytes_total = 0;
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timeout = 10000; //无响应时间为10秒
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messages = "";
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errormessage = "";
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}
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/// <summary>
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/// 构造函数
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/// </summary>
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/// <param name="server">服务器IP或名称</param>
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/// <param name="user">登陆帐号</param>
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/// <param name="pass">登陆口令</param>
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public FTP(string server, string user, string pass)
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{
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this.server = server;
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this.user = user;
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this.pass = pass;
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port = 21;
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passive_mode = true;
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main_sock = null;
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main_ipEndPoint = null;
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listening_sock = null;
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data_sock = null;
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data_ipEndPoint = null;
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file = null;
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bucket = "";
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bytes_total = 0;
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timeout = 10000; //无响应时间为10秒
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messages = "";
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errormessage = "";
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}
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/// <summary>
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/// 构造函数
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/// </summary>
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/// <param name="server">服务器IP或名称</param>
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/// <param name="port">端口号</param>
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/// <param name="user">登陆帐号</param>
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/// <param name="pass">登陆口令</param>
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public FTP(string server, int port, string user, string pass)
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{
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this.server = server;
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this.user = user;
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this.pass = pass;
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this.port = port;
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passive_mode = true;
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main_sock = null;
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main_ipEndPoint = null;
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listening_sock = null;
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data_sock = null;
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data_ipEndPoint = null;
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file = null;
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bucket = "";
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bytes_total = 0;
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timeout = 10000; //无响应时间为10秒
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messages = "";
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errormessage = "";
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}
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/// <summary>
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/// 构造函数
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/// </summary>
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/// <param name="server">服务器IP或名称</param>
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/// <param name="port">端口号</param>
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/// <param name="user">登陆帐号</param>
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/// <param name="pass">登陆口令</param>
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/// <param name="mode">链接方式</param>
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public FTP(string server, int port, string user, string pass, int mode)
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{
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this.server = server;
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this.user = user;
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this.pass = pass;
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this.port = port;
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passive_mode = mode <= 1 ? true : false;
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main_sock = null;
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main_ipEndPoint = null;
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listening_sock = null;
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data_sock = null;
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data_ipEndPoint = null;
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file = null;
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bucket = "";
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bytes_total = 0;
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this.timeout = 10000; //无响应时间为10秒
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messages = "";
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errormessage = "";
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}
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/// <summary>
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/// 构造函数
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/// </summary>
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/// <param name="server">服务器IP或名称</param>
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/// <param name="port">端口号</param>
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/// <param name="user">登陆帐号</param>
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/// <param name="pass">登陆口令</param>
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/// <param name="mode">链接方式</param>
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/// <param name="timeout">无响应时间(限时),单位:秒 (小于或等于0为不受时间限制)</param>
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public FTP(string server, int port, string user, string pass, int mode, int timeout_sec)
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{
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this.server = server;
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this.user = user;
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this.pass = pass;
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this.port = port;
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passive_mode = mode <= 1 ? true : false;
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main_sock = null;
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main_ipEndPoint = null;
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listening_sock = null;
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data_sock = null;
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data_ipEndPoint = null;
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file = null;
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bucket = "";
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bytes_total = 0;
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this.timeout = (timeout_sec <= 0) ? int.MaxValue : (timeout_sec * 1000); //无响应时间
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messages = "";
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errormessage = "";
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}
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#endregion
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#region 属性
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/// <summary>
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/// 当前是否已连接
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/// </summary>
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public bool IsConnected
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{
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get
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{
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if (main_sock != null)
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return main_sock.Connected;
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return false;
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}
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}
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/// <summary>
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/// 当message缓冲区有数据则返回
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/// </summary>
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public bool MessagesAvailable
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{
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get
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{
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if (messages.Length > 0)
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return true;
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return false;
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}
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}
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/// <summary>
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/// 获取服务器状态返回信息, 并清空messages变量
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/// </summary>
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public string Messages
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{
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get
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{
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string tmp = messages;
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messages = "";
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return tmp;
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}
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}
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/// <summary>
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/// 最新指令发出后服务器的响应
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/// </summary>
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public string ResponseString
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{
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get
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{
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return responseStr;
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}
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}
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/// <summary>
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///在一次传输中,发送或接收的字节数
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/// </summary>
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public long BytesTotal
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{
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get
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{
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return bytes_total;
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}
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}
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/// <summary>
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///被下载或上传的文件大小,当文件大小无效时为0
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/// </summary>
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public long FileSize
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{
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get
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{
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return file_size;
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}
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}
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/// <summary>
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/// 链接模式:
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/// true 被动模式 [默认]
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/// false: 主动模式
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/// </summary>
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public bool PassiveMode
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{
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get
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{
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return passive_mode;
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}
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set
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{
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passive_mode = value;
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}
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}
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#endregion
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#region 操作
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/// <summary>
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/// 操作失败
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/// </summary>
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private void Fail()
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{
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Disconnect();
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errormessage += responseStr;
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//throw new Exception(responseStr);
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}
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private void SetBinaryMode(bool mode)
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{
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if (mode)
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SendCommand("TYPE I");
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else
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SendCommand("TYPE A");
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ReadResponse();
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if (response != 200)
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Fail();
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}
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private void SendCommand(string command)
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{
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Byte[] cmd = Encoding.ASCII.GetBytes((command + "\r\n").ToCharArray());
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if (command.Length > 3 && command.Substring(0, 4) == "PASS")
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{
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messages = "\rPASS xxx";
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}
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else
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{
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messages = "\r" + command;
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}
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try
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{
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main_sock.Send(cmd, cmd.Length, 0);
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}
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catch (Exception ex)
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{
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try
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{
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Disconnect();
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errormessage += ex.Message;
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return;
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}
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catch
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{
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main_sock.Close();
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file.Close();
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main_sock = null;
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main_ipEndPoint = null;
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file = null;
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}
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}
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}
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private void FillBucket()
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{
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Byte[] bytes = new Byte[512];
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long bytesgot;
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int msecs_passed = 0;
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while (main_sock.Available < 1)
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{
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System.Threading.Thread.Sleep(50);
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msecs_passed += 50;
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//当等待时间到,则断开链接
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if (msecs_passed > timeout)
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{
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Disconnect();
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errormessage += "Timed out waiting on server to respond.";
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return;
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}
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}
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while (main_sock.Available > 0)
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{
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bytesgot = main_sock.Receive(bytes, 512, 0);
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bucket += Encoding.ASCII.GetString(bytes, 0, (int)bytesgot);
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System.Threading.Thread.Sleep(50);
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}
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}
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private string GetLineFromBucket()
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{
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int i;
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string buf = "";
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if ((i = bucket.IndexOf('\n')) < 0)
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{
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while (i < 0)
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{
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FillBucket();
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i = bucket.IndexOf('\n');
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}
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}
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buf = bucket.Substring(0, i);
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bucket = bucket.Substring(i + 1);
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return buf;
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}
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|
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/// <summary>
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/// 返回服务器端返回信息
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/// </summary>
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private void ReadResponse()
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{
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string buf;
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messages = "";
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while (true)
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{
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buf = GetLineFromBucket();
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if (Regex.Match(buf, "^[0-9]+ ").Success)
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{
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responseStr = buf;
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response = int.Parse(buf.Substring(0, 3));
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break;
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}
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else
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messages += Regex.Replace(buf, "^[0-9]+-", "") + "\n";
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}
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}
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|
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/// <summary>
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/// 打开数据套接字
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/// </summary>
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private void OpenDataSocket()
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{
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if (passive_mode)
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{
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string[] pasv;
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string server;
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int port;
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Connect();
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SendCommand("PASV");
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ReadResponse();
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if (response != 227)
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Fail();
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try
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{
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int i1, i2;
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i1 = responseStr.IndexOf('(') + 1;
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i2 = responseStr.IndexOf(')') - i1;
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pasv = responseStr.Substring(i1, i2).Split(',');
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}
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catch (Exception ex)
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{
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Disconnect();
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errormessage += "Malformed PASV response: " + responseStr;
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return;
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}
|
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if (pasv.Length < 6)
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{
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Disconnect();
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errormessage += "Malformed PASV response: " + responseStr;
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return;
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}
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server = String.Format("{0}.{1}.{2}.{3}", pasv[0], pasv[1], pasv[2], pasv[3]);
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port = (int.Parse(pasv[4]) << 8) + int.Parse(pasv[5]);
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try
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{
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CloseDataSocket();
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data_sock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
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#if NET1
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data_ipEndPoint = new IPEndPoint(Dns.GetHostByName(server).AddressList[0], port);
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#else
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data_ipEndPoint = new IPEndPoint(System.Net.Dns.GetHostEntry(server).AddressList[0], port);
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#endif
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data_sock.Connect(data_ipEndPoint);
|
|
}
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catch (Exception ex)
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{
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errormessage += "Failed to connect for data transfer: " + ex.Message;
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return;
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}
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}
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else
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{
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Connect();
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|
try
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{
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CloseDataSocket();
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listening_sock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
|
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// 对于端口,则发送IP地址.下面则提取相应信息
|
string sLocAddr = main_sock.LocalEndPoint.ToString();
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int ix = sLocAddr.IndexOf(':');
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if (ix < 0)
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{
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errormessage += "Failed to parse the local address: " + sLocAddr;
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return;
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}
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string sIPAddr = sLocAddr.Substring(0, ix);
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// 系统自动绑定一个端口号(设置 port = 0)
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System.Net.IPEndPoint localEP = new IPEndPoint(IPAddress.Parse(sIPAddr), 0);
|
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listening_sock.Bind(localEP);
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sLocAddr = listening_sock.LocalEndPoint.ToString();
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ix = sLocAddr.IndexOf(':');
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if (ix < 0)
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{
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errormessage += "Failed to parse the local address: " + sLocAddr;
|
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}
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int nPort = int.Parse(sLocAddr.Substring(ix + 1));
|
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// 开始侦听链接请求
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listening_sock.Listen(1);
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string sPortCmd = string.Format("PORT {0},{1},{2}",
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sIPAddr.Replace('.', ','),
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nPort / 256, nPort % 256);
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SendCommand(sPortCmd);
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ReadResponse();
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if (response != 200)
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Fail();
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}
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catch (Exception ex)
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{
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errormessage += "Failed to connect for data transfer: " + ex.Message;
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return;
|
}
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}
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}
|
|
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private void ConnectDataSocket()
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{
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if (data_sock != null) // 已链接
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return;
|
|
try
|
{
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data_sock = listening_sock.Accept(); // Accept is blocking
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listening_sock.Close();
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listening_sock = null;
|
|
if (data_sock == null)
|
{
|
throw new Exception("Winsock error: " +
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Convert.ToString(System.Runtime.InteropServices.Marshal.GetLastWin32Error()));
|
}
|
}
|
catch (Exception ex)
|
{
|
errormessage += "Failed to connect for data transfer: " + ex.Message;
|
}
|
}
|
|
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private void CloseDataSocket()
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{
|
if (data_sock != null)
|
{
|
if (data_sock.Connected)
|
{
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data_sock.Close();
|
}
|
data_sock = null;
|
}
|
|
data_ipEndPoint = null;
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}
|
|
/// <summary>
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/// 关闭所有链接
|
/// </summary>
|
public void Disconnect()
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{
|
CloseDataSocket();
|
|
if (main_sock != null)
|
{
|
if (main_sock.Connected)
|
{
|
SendCommand("QUIT");
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main_sock.Close();
|
}
|
main_sock = null;
|
}
|
|
if (file != null)
|
file.Close();
|
|
main_ipEndPoint = null;
|
file = null;
|
}
|
|
/// <summary>
|
/// 链接到FTP服务器
|
/// </summary>
|
/// <param name="server">要链接的IP地址或主机名</param>
|
/// <param name="port">端口号</param>
|
/// <param name="user">登陆帐号</param>
|
/// <param name="pass">登陆口令</param>
|
public void Connect(string server, int port, string user, string pass)
|
{
|
this.server = server;
|
this.user = user;
|
this.pass = pass;
|
this.port = port;
|
|
Connect();
|
}
|
|
/// <summary>
|
/// 链接到FTP服务器
|
/// </summary>
|
/// <param name="server">要链接的IP地址或主机名</param>
|
/// <param name="user">登陆帐号</param>
|
/// <param name="pass">登陆口令</param>
|
public void Connect(string server, string user, string pass)
|
{
|
this.server = server;
|
this.user = user;
|
this.pass = pass;
|
|
Connect();
|
}
|
|
/// <summary>
|
/// 链接到FTP服务器
|
/// </summary>
|
public bool Connect()
|
{
|
if (server == null)
|
{
|
errormessage += "No server has been set.\r\n";
|
}
|
if (user == null)
|
{
|
errormessage += "No server has been set.\r\n";
|
}
|
|
if (main_sock != null)
|
if (main_sock.Connected)
|
return true;
|
|
try
|
{
|
main_sock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
|
#if NET1
|
main_ipEndPoint = new IPEndPoint(Dns.GetHostByName(server).AddressList[0], port);
|
#else
|
main_ipEndPoint = new IPEndPoint(System.Net.Dns.GetHostEntry(server).AddressList[0], port);
|
#endif
|
|
main_sock.Connect(main_ipEndPoint);
|
}
|
catch (Exception ex)
|
{
|
errormessage += ex.Message;
|
return false;
|
}
|
|
ReadResponse();
|
if (response != 220)
|
Fail();
|
|
SendCommand("USER " + user);
|
ReadResponse();
|
|
switch (response)
|
{
|
case 331:
|
if (pass == null)
|
{
|
Disconnect();
|
errormessage += "No password has been set.";
|
return false;
|
}
|
SendCommand("PASS " + pass);
|
ReadResponse();
|
if (response != 230)
|
{
|
Fail();
|
return false;
|
}
|
break;
|
case 230:
|
break;
|
}
|
|
return true;
|
}
|
|
/// <summary>
|
/// 获取FTP当前(工作)目录下的文件列表
|
/// </summary>
|
/// <returns>返回文件列表数组</returns>
|
public ArrayList List()
|
{
|
Byte[] bytes = new Byte[512];
|
string file_list = "";
|
long bytesgot = 0;
|
int msecs_passed = 0;
|
ArrayList list = new ArrayList();
|
|
Connect();
|
OpenDataSocket();
|
SendCommand("LIST");
|
ReadResponse();
|
|
switch (response)
|
{
|
case 125:
|
case 150:
|
break;
|
default:
|
CloseDataSocket();
|
throw new Exception(responseStr);
|
}
|
ConnectDataSocket();
|
|
while (data_sock.Available < 1)
|
{
|
System.Threading.Thread.Sleep(50);
|
msecs_passed += 50;
|
|
if (msecs_passed > (timeout / 10))
|
{
|
break;
|
}
|
}
|
|
while (data_sock.Available > 0)
|
{
|
bytesgot = data_sock.Receive(bytes, bytes.Length, 0);
|
file_list += Encoding.ASCII.GetString(bytes, 0, (int)bytesgot);
|
System.Threading.Thread.Sleep(50);
|
}
|
|
CloseDataSocket();
|
|
ReadResponse();
|
if (response != 226)
|
throw new Exception(responseStr);
|
|
foreach (string f in file_list.Split('\n'))
|
{
|
if (f.Length > 0 && !Regex.Match(f, "^total").Success)
|
list.Add(f.Substring(0, f.Length - 1));
|
}
|
|
return list;
|
}
|
|
/// <summary>
|
/// 获取到文件名列表
|
/// </summary>
|
/// <returns>返回文件名列表</returns>
|
public ArrayList ListFiles()
|
{
|
ArrayList list = new ArrayList();
|
|
foreach (string f in List())
|
{
|
if ((f.Length > 0))
|
{
|
if ((f[0] != 'd') && (f.ToUpper().IndexOf("<DIR>") < 0))
|
list.Add(f);
|
}
|
}
|
|
return list;
|
}
|
|
/// <summary>
|
/// 获取路径列表
|
/// </summary>
|
/// <returns>返回路径列表</returns>
|
public ArrayList ListDirectories()
|
{
|
ArrayList list = new ArrayList();
|
|
foreach (string f in List())
|
{
|
if (f.Length > 0)
|
{
|
if ((f[0] == 'd') || (f.ToUpper().IndexOf("<DIR>") >= 0))
|
list.Add(f);
|
}
|
}
|
|
return list;
|
}
|
|
/// <summary>
|
/// 获取原始数据信息.
|
/// </summary>
|
/// <param name="fileName">远程文件名</param>
|
/// <returns>返回原始数据信息.</returns>
|
public string GetFileDateRaw(string fileName)
|
{
|
Connect();
|
|
SendCommand("MDTM " + fileName);
|
ReadResponse();
|
if (response != 213)
|
{
|
errormessage += responseStr;
|
return "";
|
}
|
|
return (this.responseStr.Substring(4));
|
}
|
|
/// <summary>
|
/// 得到文件日期.
|
/// </summary>
|
/// <param name="fileName">远程文件名</param>
|
/// <returns>返回远程文件日期</returns>
|
public DateTime GetFileDate(string fileName)
|
{
|
return ConvertFTPDateToDateTime(GetFileDateRaw(fileName));
|
}
|
|
private DateTime ConvertFTPDateToDateTime(string input)
|
{
|
if (input.Length < 14)
|
throw new ArgumentException("Input Value for ConvertFTPDateToDateTime method was too short.");
|
|
//YYYYMMDDhhmmss":
|
int year = Convert.ToInt16(input.Substring(0, 4));
|
int month = Convert.ToInt16(input.Substring(4, 2));
|
int day = Convert.ToInt16(input.Substring(6, 2));
|
int hour = Convert.ToInt16(input.Substring(8, 2));
|
int min = Convert.ToInt16(input.Substring(10, 2));
|
int sec = Convert.ToInt16(input.Substring(12, 2));
|
|
return new DateTime(year, month, day, hour, min, sec);
|
}
|
|
/// <summary>
|
/// 获取FTP上的当前(工作)路径
|
/// </summary>
|
/// <returns>返回FTP上的当前(工作)路径</returns>
|
public string GetWorkingDirectory()
|
{
|
//PWD - 显示工作路径
|
Connect();
|
SendCommand("PWD");
|
ReadResponse();
|
|
if (response != 257)
|
{
|
errormessage += responseStr;
|
}
|
|
string pwd;
|
try
|
{
|
pwd = responseStr.Substring(responseStr.IndexOf("\"", 0) + 1);//5);
|
pwd = pwd.Substring(0, pwd.LastIndexOf("\""));
|
pwd = pwd.Replace("\"\"", "\""); // 替换带引号的路径信息符号
|
}
|
catch (Exception ex)
|
{
|
errormessage += ex.Message;
|
return null;
|
}
|
|
return pwd;
|
}
|
|
|
/// <summary>
|
/// 跳转服务器上的当前(工作)路径
|
/// </summary>
|
/// <param name="path">要跳转的路径</param>
|
public bool ChangeDir(string path)
|
{
|
Connect();
|
SendCommand("CWD " + path);
|
ReadResponse();
|
if (response != 250)
|
{
|
errormessage += responseStr;
|
return false;
|
}
|
return true;
|
}
|
|
/// <summary>
|
/// 创建指定的目录
|
/// </summary>
|
/// <param name="dir">要创建的目录</param>
|
public void MakeDir(string dir)
|
{
|
Connect();
|
SendCommand("MKD " + dir);
|
ReadResponse();
|
|
switch (response)
|
{
|
case 257:
|
case 250:
|
break;
|
default:
|
{
|
errormessage += responseStr;
|
break;
|
}
|
}
|
}
|
|
/// <summary>
|
/// 移除FTP上的指定目录
|
/// </summary>
|
/// <param name="dir">要移除的目录</param>
|
public void RemoveDir(string dir)
|
{
|
Connect();
|
SendCommand("RMD " + dir);
|
ReadResponse();
|
if (response != 250)
|
{
|
errormessage += responseStr;
|
return; ;
|
}
|
}
|
|
/// <summary>
|
/// 移除FTP上的指定文件
|
/// </summary>
|
/// <param name="filename">要移除的文件名称</param>
|
public void RemoveFile(string filename)
|
{
|
Connect();
|
SendCommand("DELE " + filename);
|
ReadResponse();
|
if (response != 250)
|
{
|
errormessage += responseStr;
|
}
|
}
|
|
/// <summary>
|
/// 重命名FTP上的文件
|
/// </summary>
|
/// <param name="oldfilename">原文件名</param>
|
/// <param name="newfilename">新文件名</param>
|
public void RenameFile(string oldfilename, string newfilename)
|
{
|
Connect();
|
SendCommand("RNFR " + oldfilename);
|
ReadResponse();
|
if (response != 350)
|
{
|
errormessage += responseStr;
|
}
|
else
|
{
|
SendCommand("RNTO " + newfilename);
|
ReadResponse();
|
if (response != 250)
|
{
|
errormessage += responseStr;
|
}
|
}
|
}
|
|
/// <summary>
|
/// 获得指定文件的大小(如果FTP支持)
|
/// </summary>
|
/// <param name="filename">指定的文件</param>
|
/// <returns>返回指定文件的大小</returns>
|
public long GetFileSize(string filename)
|
{
|
Connect();
|
SendCommand("SIZE " + filename);
|
ReadResponse();
|
if (response != 213)
|
{
|
errormessage += responseStr;
|
}
|
|
return Int64.Parse(responseStr.Substring(4));
|
}
|
|
/// <summary>
|
/// 上传指定的文件
|
/// </summary>
|
/// <param name="filename">要上传的文件</param>
|
public bool OpenUpload(string filename)
|
{
|
return OpenUpload(filename, filename, false);
|
}
|
|
/// <summary>
|
/// 上传指定的文件
|
/// </summary>
|
/// <param name="filename">本地文件名</param>
|
/// <param name="remotefilename">远程要覆盖的文件名</param>
|
public bool OpenUpload(string filename, string remotefilename)
|
{
|
return OpenUpload(filename, remotefilename, false);
|
}
|
|
/// <summary>
|
/// 上传指定的文件
|
/// </summary>
|
/// <param name="filename">本地文件名</param>
|
/// <param name="resume">如果存在,则尝试恢复</param>
|
public bool OpenUpload(string filename, bool resume)
|
{
|
return OpenUpload(filename, filename, resume);
|
}
|
|
/// <summary>
|
/// 上传指定的文件
|
/// </summary>
|
/// <param name="filename">本地文件名</param>
|
/// <param name="remote_filename">远程要覆盖的文件名</param>
|
/// <param name="resume">如果存在,则尝试恢复</param>
|
public bool OpenUpload(string filename, string remote_filename, bool resume)
|
{
|
Connect();
|
SetBinaryMode(true);
|
OpenDataSocket();
|
|
bytes_total = 0;
|
|
try
|
{
|
file = new FileStream(filename, FileMode.Open);
|
}
|
catch (Exception ex)
|
{
|
file = null;
|
errormessage += ex.Message;
|
return false;
|
}
|
|
file_size = file.Length;
|
|
if (resume)
|
{
|
long size = GetFileSize(remote_filename);
|
SendCommand("REST " + size);
|
ReadResponse();
|
if (response == 350)
|
file.Seek(size, SeekOrigin.Begin);
|
}
|
|
SendCommand("STOR " + remote_filename);
|
ReadResponse();
|
|
switch (response)
|
{
|
case 125:
|
case 150:
|
break;
|
default:
|
file.Close();
|
file = null;
|
errormessage += responseStr;
|
return false;
|
}
|
ConnectDataSocket();
|
|
return true;
|
}
|
|
/// <summary>
|
/// 下载指定文件
|
/// </summary>
|
/// <param name="filename">远程文件名称</param>
|
public void OpenDownload(string filename)
|
{
|
OpenDownload(filename, filename, false);
|
}
|
|
/// <summary>
|
/// 下载并恢复指定文件
|
/// </summary>
|
/// <param name="filename">远程文件名称</param>
|
/// <param name="resume">如文件存在,则尝试恢复</param>
|
public void OpenDownload(string filename, bool resume)
|
{
|
OpenDownload(filename, filename, resume);
|
}
|
|
/// <summary>
|
/// 下载指定文件
|
/// </summary>
|
/// <param name="filename">远程文件名称</param>
|
/// <param name="localfilename">本地文件名</param>
|
public void OpenDownload(string remote_filename, string localfilename)
|
{
|
OpenDownload(remote_filename, localfilename, false);
|
}
|
|
/// <summary>
|
/// 打开并下载文件
|
/// </summary>
|
/// <param name="remote_filename">远程文件名称</param>
|
/// <param name="local_filename">本地文件名</param>
|
/// <param name="resume">如果文件存在则恢复</param>
|
public void OpenDownload(string remote_filename, string local_filename, bool resume)
|
{
|
Connect();
|
SetBinaryMode(true);
|
|
bytes_total = 0;
|
|
try
|
{
|
file_size = GetFileSize(remote_filename);
|
}
|
catch
|
{
|
file_size = 0;
|
}
|
|
if (resume && File.Exists(local_filename))
|
{
|
try
|
{
|
file = new FileStream(local_filename, FileMode.Open);
|
}
|
catch (Exception ex)
|
{
|
file = null;
|
throw new Exception(ex.Message);
|
}
|
|
SendCommand("REST " + file.Length);
|
ReadResponse();
|
if (response != 350)
|
throw new Exception(responseStr);
|
file.Seek(file.Length, SeekOrigin.Begin);
|
bytes_total = file.Length;
|
}
|
else
|
{
|
try
|
{
|
file = new FileStream(local_filename, FileMode.Create);
|
}
|
catch (Exception ex)
|
{
|
file = null;
|
throw new Exception(ex.Message);
|
}
|
}
|
|
OpenDataSocket();
|
SendCommand("RETR " + remote_filename);
|
ReadResponse();
|
|
switch (response)
|
{
|
case 125:
|
case 150:
|
break;
|
default:
|
file.Close();
|
file = null;
|
errormessage += responseStr;
|
return;
|
}
|
ConnectDataSocket();
|
|
return;
|
}
|
|
/// <summary>
|
/// 上传文件(循环调用直到上传完毕)
|
/// </summary>
|
/// <returns>发送的字节数</returns>
|
public long DoUpload()
|
{
|
Byte[] bytes = new Byte[512];
|
long bytes_got;
|
|
try
|
{
|
bytes_got = file.Read(bytes, 0, bytes.Length);
|
bytes_total += bytes_got;
|
data_sock.Send(bytes, (int)bytes_got, 0);
|
|
if (bytes_got <= 0)
|
{
|
//上传完毕或有错误发生
|
file.Close();
|
file = null;
|
|
CloseDataSocket();
|
ReadResponse();
|
switch (response)
|
{
|
case 226:
|
case 250:
|
break;
|
default: //当上传中断时
|
{
|
errormessage += responseStr;
|
return -1;
|
}
|
}
|
|
SetBinaryMode(false);
|
}
|
}
|
catch (Exception ex)
|
{
|
file.Close();
|
file = null;
|
CloseDataSocket();
|
ReadResponse();
|
SetBinaryMode(false);
|
//throw ex;
|
//当上传中断时
|
errormessage += ex.Message;
|
return -1;
|
}
|
|
return bytes_got;
|
}
|
|
/// <summary>
|
/// 下载文件(循环调用直到下载完毕)
|
/// </summary>
|
/// <returns>接收到的字节点</returns>
|
public long DoDownload()
|
{
|
Byte[] bytes = new Byte[512];
|
long bytes_got;
|
|
try
|
{
|
bytes_got = data_sock.Receive(bytes, bytes.Length, 0);
|
|
if (bytes_got <= 0)
|
{
|
//下载完毕或有错误发生
|
CloseDataSocket();
|
file.Close();
|
file = null;
|
|
ReadResponse();
|
switch (response)
|
{
|
case 226:
|
case 250:
|
break;
|
default:
|
{
|
errormessage += responseStr;
|
return -1;
|
}
|
}
|
|
SetBinaryMode(false);
|
|
return bytes_got;
|
}
|
|
file.Write(bytes, 0, (int)bytes_got);
|
bytes_total += bytes_got;
|
}
|
catch (Exception ex)
|
{
|
CloseDataSocket();
|
file.Close();
|
file = null;
|
ReadResponse();
|
SetBinaryMode(false);
|
//throw ex;
|
//当下载中断时
|
errormessage += ex.Message;
|
return -1;
|
}
|
|
return bytes_got;
|
}
|
|
#endregion
|
}
|
}
|
