再看ftp上传文件-白红宇

再看ftp上传文件

阅读量：617 次

发布时间：2019-03-13

本文共 17840 字，大约阅读时间需要 59 分钟。

前言

去年在项目中用到ftp上传文件，用FtpWebRequest和FtpWebResponse封装一个帮助类，这个在网上能找到很多，前台使用Uploadify控件，然后在服务器上搭建Ftp服务器，在本地测试程序上传到ftp服务器一点问题都没有，奇怪的是当发布Web和ftp到同一个IIS下，上传文件时程序直接卡死，然后页面卡死，后来我又发现把Web和ftp分开发布在两台机器上问题又得到解决，所以当时放弃了这个方案。

再看ftp上传文件

前几天偶然看到Wolfy写到一个项目总结，其中提到了用ServerU搭建服务器，突然想起来，以前还弄过ServerU呢，然后我重新做了测试。我直接把Wolfy的FtpHelper拿出来测试，大致浏览了下程序，主要思路还是利用FtpWebRequest和FtpWebResponse来实现。

public class FTPHelper    {        #region 字段        ///         /// ftp地址，带ftp协议        /// 
        private string strFtpURI;        ///         /// ftp用户名        /// 
        private string strFtpUserID;        ///         /// ftp的ip地址        /// 
        private string strFtpServerIP;        ///         /// ftp用户登录密码        /// 
        private string strFtpPassword;        ///         /// ftp目录路径        /// 
        private string strFtpRemotePath;        #endregion        ///           /// 连接FTP服务器        /// 
          /// FTP连接地址          /// 指定FTP连接成功后的当前目录, 如果不指定即默认为根目录          /// 用户名          /// 密码          public FTPHelper(string strFtpServerIP, string strFtpRemotePath, string strFtpUserID, string strFtpPassword)        {            this.strFtpServerIP = strFtpServerIP;            this.strFtpRemotePath = strFtpRemotePath;            this.strFtpUserID = strFtpUserID;            this.strFtpPassword = strFtpPassword;            this.strFtpURI = "ftp://" + strFtpServerIP + strFtpRemotePath;        }        ///         /// 上载        /// 
        /// 本地文件路径        /// ftp服务器文件保存路径        public void Upload(string strFilename, string strSavePath)        {            FileInfo fileInf = new FileInfo(strFilename);            FtpWebRequest reqFTP;            reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(strFtpURI + strSavePath + fileInf.Name));            reqFTP.Credentials = new NetworkCredential(strFtpUserID, strFtpPassword);            reqFTP.Method = WebRequestMethods.Ftp.UploadFile;            reqFTP.KeepAlive = false;            reqFTP.UseBinary = true;            reqFTP.Proxy = null;            reqFTP.ContentLength = fileInf.Length;                        int buffLength = 2048;            byte[] buff = new byte[buffLength];            int contentLen;            FileStream fs = fileInf.OpenRead();            try            {                Stream strm = reqFTP.GetRequestStream();                contentLen = fs.Read(buff, 0, buffLength);                while (contentLen != 0)                {                    strm.Write(buff, 0, contentLen);                    contentLen = fs.Read(buff, 0, buffLength);                }                strm.Close();                fs.Close();            }            catch (Exception ex)            {                throw new Exception(ex.Message);            }        }        public void Upload(HttpPostedFile file,string strSavePath)        {            FtpWebRequest reqFTP;            //请求的 URI 对于此 FTP 命令无效             reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(strFtpURI + strSavePath+file.FileName));            reqFTP.Credentials = new NetworkCredential(strFtpUserID, strFtpPassword);            reqFTP.Method = WebRequestMethods.Ftp.UploadFile;            reqFTP.KeepAlive = false;            reqFTP.UseBinary = true;            reqFTP.Proxy = null;            int buffLength = 2048;            byte[] buff = new byte[buffLength];                        Stream stream = file.InputStream;            Stream requestStream = reqFTP.GetRequestStream();            int len = stream.Read(buff, 0, buff.Length);            while (len > 0)            {                requestStream.Write(buff, 0, buffLength);                len = stream.Read(buff, 0, buffLength);            }            stream.Close();            requestStream.Close();            stream.Dispose();            requestStream.Dispose();        }        ///         /// 上载        /// 
        /// 本地文件路径        /// ftp服务器文件保存路径        /// ftp服务器文件保存的名字        public void Upload(string strFilename, string strSavePath, string strStrOldName)        {            FileInfo fileInf = new FileInfo(strFilename);            FtpWebRequest reqFTP;            reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(strFtpURI + strSavePath + strStrOldName));            reqFTP.Credentials = new NetworkCredential(strFtpUserID, strFtpPassword);            reqFTP.Method = WebRequestMethods.Ftp.UploadFile;            reqFTP.KeepAlive = false;            reqFTP.UseBinary = true;            reqFTP.Proxy = null;            reqFTP.ContentLength = fileInf.Length;            int buffLength = 2048;            byte[] buff = new byte[buffLength];            int contentLen;            FileStream fs = fileInf.OpenRead();            try            {                Stream strm = reqFTP.GetRequestStream();                contentLen = fs.Read(buff, 0, buffLength);                while (contentLen != 0)                {                    strm.Write(buff, 0, contentLen);                    contentLen = fs.Read(buff, 0, buffLength);                }                strm.Close();                fs.Close();            }            catch (Exception ex)            {                throw new Exception(ex.Message);            }        }        ///         /// 下载        /// 
        /// 本地保存路径        /// 文件名         /// 本地临时名称        public void Download(string strFilePath, string strFileName, string strLocalName)        {            try            {                FileStream outputStream = new FileStream(strFilePath + strLocalName, FileMode.Create);                FtpWebRequest reqFTP;                reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(strFtpURI + strFileName));                reqFTP.Credentials = new NetworkCredential(strFtpUserID, strFtpPassword);                reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;                reqFTP.UseBinary = true;                reqFTP.UsePassive = true;                reqFTP.Proxy = null;                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();                Stream ftpStream = response.GetResponseStream();                long cl = response.ContentLength;                int bufferSize = 2048;                int readCount;                byte[] buffer = new byte[bufferSize];                readCount = ftpStream.Read(buffer, 0, bufferSize);                while (readCount > 0)                {                    outputStream.Write(buffer, 0, readCount);                    readCount = ftpStream.Read(buffer, 0, bufferSize);                }                ftpStream.Close();                outputStream.Close();                response.Close();            }            catch (Exception ex)            {            }        }        ///         /// 下载        /// 
        /// 本地保存路径        /// 文件名        public void Download(string strFilePath, string strFileName)        {            try            {                FileStream outputStream = new FileStream(strFilePath + strFileName, FileMode.Create);                FtpWebRequest reqFTP;                reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(strFtpURI + strFileName));                reqFTP.Credentials = new NetworkCredential(strFtpUserID, strFtpPassword);                reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;                reqFTP.UseBinary = true;                reqFTP.UsePassive = true;                reqFTP.Proxy = null;                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();                Stream ftpStream = response.GetResponseStream();                long cl = response.ContentLength;                int bufferSize = 2048;                int readCount;                byte[] buffer = new byte[bufferSize];                readCount = ftpStream.Read(buffer, 0, bufferSize);                while (readCount > 0)                {                    outputStream.Write(buffer, 0, readCount);                    readCount = ftpStream.Read(buffer, 0, bufferSize);                }                ftpStream.Close();                outputStream.Close();                response.Close();            }            catch (Exception ex)            {            }        }        ///         /// 删除文件        /// 
        /// 文件名        public void Delete(string strFileName)        {            try            {                FtpWebRequest reqFTP;                reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(strFtpURI + strFileName));                reqFTP.Credentials = new NetworkCredential(strFtpUserID, strFtpPassword);                reqFTP.Method = WebRequestMethods.Ftp.DeleteFile;                reqFTP.KeepAlive = false;                string result = String.Empty;                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();                long size = response.ContentLength;                Stream datastream = response.GetResponseStream();                StreamReader sr = new StreamReader(datastream);                result = sr.ReadToEnd();                sr.Close();                datastream.Close();                response.Close();            }            catch (Exception ex)            {                throw new Exception(ex.Message);            }        }        ///         /// 获取当前目录下明细(包含文件和文件夹)          /// 
        /// 
            public string[] GetFilesDetailList()        {            try            {                StringBuilder result = new StringBuilder();                FtpWebRequest ftp;                ftp = (FtpWebRequest)FtpWebRequest.Create(new Uri(strFtpURI));                ftp.Credentials = new NetworkCredential(strFtpUserID, strFtpPassword);                ftp.Method = WebRequestMethods.Ftp.ListDirectoryDetails;                WebResponse response = ftp.GetResponse();                StreamReader reader = new StreamReader(response.GetResponseStream());                string line = reader.ReadLine();                line = reader.ReadLine();                line = reader.ReadLine();                while (line != null)                {                    result.Append(line);                    result.Append("\n");                    line = reader.ReadLine();                }                result.Remove(result.ToString().LastIndexOf("\n"), 1);                reader.Close();                response.Close();                return result.ToString().Split('\n');            }            catch (Exception ex)            {                throw new Exception(ex.Message);            }        }        ///         ///  获取FTP文件列表(包括文件夹)        /// 
        ///         /// 
            private string[] GetAllList(string strUrl)        {            List
    
      list = new List
     
      ();            FtpWebRequest req = (FtpWebRequest)WebRequest.Create(new Uri(strUrl));            req.Credentials = new NetworkCredential(strFtpPassword, strFtpPassword);            req.Method = WebRequestMethods.Ftp.ListDirectory;            req.UseBinary = true;            req.UsePassive = true;            try            {                using (FtpWebResponse res = (FtpWebResponse)req.GetResponse())                {                    using (StreamReader sr = new StreamReader(res.GetResponseStream()))                    {                        string s;                        while ((s = sr.ReadLine()) != null)                        {                            list.Add(s);                        }                    }                }            }            catch (Exception ex)            {                throw (ex);            }            return list.ToArray();        }        /// 
                /// 获取当前目录下文件列表(不包括文件夹)          /// 
          public string[] GetFileList(string strUrl)        {            StringBuilder result = new StringBuilder();            FtpWebRequest reqFTP;            try            {                reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(strUrl));                reqFTP.UseBinary = true;                reqFTP.Credentials = new NetworkCredential(strFtpPassword, strFtpPassword);                reqFTP.Method = WebRequestMethods.Ftp.ListDirectoryDetails;                WebResponse response = reqFTP.GetResponse();                StreamReader reader = new StreamReader(response.GetResponseStream());                string line = reader.ReadLine();                while (line != null)                {                    if (line.IndexOf("
      
       ") == -1)                    {                        result.Append(Regex.Match(line, @"[\S]+ [\S]+", RegexOptions.IgnoreCase).Value.Split(' ')[1]);                        result.Append("\n");                    }                    line = reader.ReadLine();                }                result.Remove(result.ToString().LastIndexOf('\n'), 1);                reader.Close();                response.Close();            }            catch (Exception ex)            {                throw (ex);            }            return result.ToString().Split('\n');        }        /// 
                 /// 判断当前目录下指定的文件是否存在          /// 
          /// 
       远程文件名          public bool FileExist(string strRemoteFileName)        {            string[] fileList = GetFileList("*.*");            foreach (string str in fileList)            {                if (str.Trim() == strRemoteFileName.Trim())                {                    return true;                }            }            return false;        }        /// 
               /// 创建文件夹          /// 
        /// 
       目录名        public void MakeDir(string strDirName)        {            FtpWebRequest reqFTP;            try            {                reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(strFtpURI + strDirName));                reqFTP.Method = WebRequestMethods.Ftp.MakeDirectory;                reqFTP.UseBinary = true;                reqFTP.Credentials = new NetworkCredential(strFtpUserID, strFtpPassword);                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();                Stream ftpStream = response.GetResponseStream();                ftpStream.Close();                response.Close();            }            catch (Exception ex)            {            }        }        /// 
                 /// 获取指定文件大小          /// 
          public long GetFileSize(string strFilename)        {            FtpWebRequest reqFTP;            long fileSize = 0;            try            {                reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(strFtpURI + strFilename));                reqFTP.Method = WebRequestMethods.Ftp.GetFileSize;                reqFTP.UseBinary = true;                reqFTP.Credentials = new NetworkCredential(strFtpUserID, strFtpPassword);                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();                Stream ftpStream = response.GetResponseStream();                fileSize = response.ContentLength;                ftpStream.Close();                response.Close();            }            catch (Exception ex)            { throw ex; }            return fileSize;        }        /// 
                 /// 更改文件名          /// 
         public void ReName(string strCurrentFilename, string strNewFilename)        {            FtpWebRequest reqFTP;            try            {                reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(strFtpURI + strCurrentFilename));                reqFTP.Method = WebRequestMethods.Ftp.Rename;                reqFTP.RenameTo = strNewFilename;                reqFTP.UseBinary = true;                reqFTP.Credentials = new NetworkCredential(strFtpUserID, strFtpPassword);                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();                Stream ftpStream = response.GetResponseStream();                ftpStream.Close();                response.Close();            }            catch (Exception ex)            { throw ex; }        }        /// 
                 /// 移动文件          /// 
          public void MovieFile(string strCurrentFilename, string strNewDirectory)        {            ReName(strCurrentFilename, strNewDirectory);        }        /// 
                 /// 切换当前目录          /// 
          /// 
       true:绝对路径 false:相对路径           public void GotoDirectory(string strDirectoryName, bool bIsRoot)        {            if (bIsRoot)            {                strFtpRemotePath = strDirectoryName;            }            else            {                strFtpRemotePath += strDirectoryName + "/";            }            strFtpURI = "ftp://" + strFtpServerIP + "/" + strFtpRemotePath + "/";        }    }

对两个上传方法的测试

其中包含3个Upload方法，两个方法第一个参数都是本地文件的绝对路径，但是在Web页面中使用file控件在后台是得不到文件绝对路径的，只能得到文件名，于是我加了第三个方法，直接用HttpPostedFile作为方法的第一个参数，用属性InputStream作为输入流。关于这个我问下Wolfy他是怎么调用的，他是把上传的文件先存到Web站点下，然后再上传到ftp服务器上，方法可行，我没有想到，太笨了。

public void Upload(HttpPostedFile file,string strSavePath)        {            FtpWebRequest reqFTP;            //请求的 URI 对于此 FTP 命令无效             reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(strFtpURI + strSavePath+file.FileName));            reqFTP.Credentials = new NetworkCredential(strFtpUserID, strFtpPassword);            reqFTP.Method = WebRequestMethods.Ftp.UploadFile;            reqFTP.KeepAlive = false;            reqFTP.UseBinary = true;            reqFTP.Proxy = null;            int buffLength = 2048;            byte[] buff = new byte[buffLength];                        Stream stream = file.InputStream;            Stream requestStream = reqFTP.GetRequestStream();            int len = stream.Read(buff, 0, buff.Length);            while (len > 0)            {                requestStream.Write(buff, 0, buffLength);                len = stream.Read(buff, 0, buffLength);            }            stream.Close();            requestStream.Close();            stream.Dispose();            requestStream.Dispose();        }

ServerU安装和配置教程

参考：

总结

上传方法我直接使用HttpPostedFile测试通过，并且发布到IIS上测试通过，也可以将文件上传到web站点下再上传到ftp服务器中。Ftp服务器使用ServerU搭建。再次在测试过程中感谢Wolfy对问题的指导和回复。

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