分布式部署网站---文件系统的存储--ftp上传图片到指定文件服务器

问：通常一个网站程序发布在一个iis服务器上，但是如果要分布式部署网站。文件系统该如何存储呢？

答：通常的就是给网站文件系统一个子域名。比如 https：//images.web.com. 网站程序内部通过代码调用ftp服务器-每次用户上传文件直接上传到相应imags域名对应的目录。

问：如果网站的图片，文件部署在子域名 网站该如何调用呢？

答：在视图模板里面 直接读取配置的images 域名  程序如下。。。

 public class AppConfig
    {
       /// <summary>
        /// 上传文件存放文件夹
        /// </summary>
        public static string FileSaveBasePath = ConfigurationManager.AppSettings["FileSaveBasePath"].ToString();

        /// <summary>
        /// ftpip
        /// </summary>
        public static string FtpServerIP = ConfigurationManager.AppSettings["FtpServerIP"].ToString();

        /// <summary>
        /// ftp登陆名
        /// </summary>
        public static string FtpUserId = ConfigurationManager.AppSettings["FtpUserId"].ToString();

        /// <summary>
        /// ftp登陆密码
        /// </summary>
        public static string FtpPassword = ConfigurationManager.AppSettings["FtpPassword"].ToString();

        /// <summary>
        /// ftp上html的基础路径
        /// </summary>
        public static string FtpHtmlBasePath = ConfigurationManager.AppSettings["FtpHtmlBasePath"].ToString();

        /// <summary>
        /// ftp上file的基础路径
        /// </summary>
        public static string FtpFileBasePath = ConfigurationManager.AppSettings["FtpFileBasePath"].ToString();

        /// <summary>
        /// 是否需要ftp上传
        /// </summary>
        public static bool FtpUpload
        {
            get
            {
                bool flag = false;
                if (bool.TryParse(ConfigurationManager.AppSettings["FtpUpload"].ToString(), out flag))
                    return flag;
                else
                    return false;
            }
        }
    }

  /// <summary>
        /// 创建图片文件
        /// </summary>
        /// <param name="btImage">图片二进制字符串</param>
        /// <param name="imageName">文件相对路径+文件名</param>
        /// <returns></returns>
        public bool CreateFileImage(byte[] image, string readPath)
        {
            if (image == null)
                return false;
            try
            {
                bool flag = true;
                string errorinfo = string.Empty;
                isCreateDir(path + readPath);
                System.IO.File.WriteAllBytes(path + readPath, image);
                Loger.Info(string.Format("方法名：{0}，创建图片文件成功，文件路径:{1}", "CreateFileImage", path + readPath));
                //ftp上传操作
                flag = FtpUpload(path + readPath, readPath, AppConfig.FtpFileBasePath, out errorinfo);
                return flag;
            }
            catch (Exception ex)
            {
                Loger.Info(string.Format("方法名：{0}，创建图片文件失败!", "CreateFileImage"));
                Loger.Error(ex);
                return false;
            }
        }

  public bool FtpUpload(string fileLocalPath, string filePath, string fileFtpPath, out string errorInfo)
        {
            bool flag = true;
            errorInfo = string.Empty;
            if (AppConfig.FtpUpload)
            {
                FtpHelper ftp = new FtpHelper();
                ftp.FtpUpDown(AppConfig.FtpServerIP, AppConfig.FtpUserId, AppConfig.FtpPassword);
                string directory = FileHelper.GetFileDirectory(filePath);//获取该文件的文件路径结构
                if (!string.IsNullOrEmpty(directory) && directory != "/" && directory != "\\")
                {
                    //ftp.MakeDir(fileFtpPath + directory);
                    directory = directory.TrimStart(‘/‘).TrimEnd(‘/‘);
                    string[] dirs = directory.Split(‘/‘);
                    string ftpCreateDir = fileFtpPath;
                    //创建ftp目录，目前只能一级一级创建
                    for (int i = 0; i < dirs.Length; i++)
                    {
                        ftpCreateDir += "/" + dirs[i] + "/";
                        ftp.MakeDir(ftpCreateDir);
                    }

                }
                flag = ftp.Upload(fileLocalPath, fileFtpPath + filePath, out errorInfo);
                if (flag)
                    Loger.Info(string.Format("上传ftp文件成功，文件路径:{0},{1}", fileFtpPath + filePath, errorInfo));
                else
                    Loger.Warn(string.Format("上传ftp文件失败，文件路径:{0},{1}", fileFtpPath + filePath, errorInfo));
            }
            return flag;
        }

 public class FtpHelper
    {
        string ftpServerIP;
        string ftpUserID;
        string ftpPassword;
        FtpWebRequest reqFTP;

        //public void Connecttest(string ftpServerIP, string ftpUserID, string ftpPassword)
        //{
        //    // 根据uri创建FtpWebRequest对象
        //    reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://" + ftpServerIP));
        //    // 指定数据传输类型
        //    reqFTP.UseBinary = true;
        //    // ftp用户名和密码
        //    reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
        //}

        #region 连接
        /// <summary>
        /// 连接
        /// </summary>
        /// <param name="path"></param>
        private void Connect(String path)//连接ftp
        {
            // 根据uri创建FtpWebRequest对象
            reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(path));
            // 指定数据传输类型
            reqFTP.UseBinary = true;
            // ftp用户名和密码
            reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
        }
        #endregion

        #region ftp登录信息
        /// <summary>
        /// ftp登录信息
        /// </summary>
        /// <param name="ftpServerIP">ftpServerIP</param>
        /// <param name="ftpUserID">ftpUserID</param>
        /// <param name="ftpPassword">ftpPassword</param>
        public void FtpUpDown(string ftpServerIP, string ftpUserID, string ftpPassword)
        {
            this.ftpServerIP = ftpServerIP;
            this.ftpUserID = ftpUserID;
            this.ftpPassword = ftpPassword;
        }
        #endregion

        #region 获取文件列表
        /// <summary>
        /// 获取文件列表
        /// </summary>
        /// <param name="path"></param>
        /// <param name="WRMethods"></param>
        /// <returns></returns>
        private string[] GetFileList(string path, string WRMethods)//上面的代码示例了如何从ftp服务器上获得文件列表
        {
            string[] downloadFiles;
            StringBuilder result = new StringBuilder();
            try
            {
                Connect(path);
                reqFTP.Method = WRMethods;
                WebResponse response = reqFTP.GetResponse();
                StreamReader reader = new StreamReader(response.GetResponseStream(), System.Text.Encoding.UTF8);//中文文件名
                string line = reader.ReadLine();
                while (line != null)
                {
                    result.Append(line);
                    result.Append("\n");
                    line = reader.ReadLine();
                }
                // to remove the trailing ‘\n‘
                int lastIndex = result.ToString().LastIndexOf(‘\n‘);
                if (lastIndex > -1)
                    result.Remove(lastIndex, 1);
                reader.Close();
                response.Close();
                return result.ToString().Split(‘\n‘);
            }
            catch (Exception ex)
            {
                //System.Windows.Forms.MessageBox.Show(ex.Message);
                Loger.Error(ex);
                downloadFiles = null;
                return downloadFiles;
            }
        }
        public string[] GetFileList(string path)//上面的代码示例了如何从ftp服务器上获得文件列表
        {
            return GetFileList("ftp://" + ftpServerIP + "/" + path, WebRequestMethods.Ftp.ListDirectory);
        }
        public string[] GetFileList()//上面的代码示例了如何从ftp服务器上获得文件列表
        {
            return GetFileList("ftp://" + ftpServerIP + "/", WebRequestMethods.Ftp.ListDirectory);
        }
        #endregion

        #region 上传文件
        /// <summary>
        /// 上传文件
        /// </summary>
        /// <param name="filename"></param>
        public  bool Upload(string filename, string path, out string errorinfo) //上面的代码实现了从ftp服务器上载文件的功能
        {
            path = path.Replace("\\", "/");
            FileInfo fileInf = new FileInfo(filename);
            string a = fileInf.Directory.Name;
            string uri = "ftp://" + ftpServerIP + "/" + path;
            Connect(uri);//连接
            // 默认为true，连接不会被关闭
            // 在一个命令之后被执行
            reqFTP.KeepAlive = false;
            // 指定执行什么命令
            reqFTP.Method = WebRequestMethods.Ftp.UploadFile;
            // 上传文件时通知服务器文件的大小
            reqFTP.ContentLength = fileInf.Length;
            // 缓冲大小设置为kb
            int buffLength = 2048;
            byte[] buff = new byte[buffLength];
            int contentLen;
            // 打开一个文件流(System.IO.FileStream) 去读上传的文件
            FileStream fs = fileInf.OpenRead();
            try
            {
                // 把上传的文件写入流
                Stream strm = reqFTP.GetRequestStream();
                // 每次读文件流的kb
                contentLen = fs.Read(buff, 0, buffLength);
                // 流内容没有结束
                while (contentLen != 0)
                {
                    // 把内容从file stream 写入upload stream
                    strm.Write(buff, 0, contentLen);
                    contentLen = fs.Read(buff, 0, buffLength);
                }
                // 关闭两个流
                strm.Close();
                fs.Close();
                errorinfo = "完成";
                return true;
            }
            catch (Exception ex)
            {
                errorinfo = string.Format("因{0},无法完成上传", ex.Message);
                return false;
            }
        }
        #endregion

        #region 续传文件
        /// <summary>
        /// 续传文件
        /// </summary>
        /// <param name="filename"></param>
        public bool Upload(string filename, long size, string path, out string errorinfo) //上面的代码实现了从ftp服务器上载文件的功能
        {
            path = path.Replace("\\", "/");
            FileInfo fileInf = new FileInfo(filename);
            //string uri = "ftp://" + path + "/" + fileInf.Name;
            string uri = "ftp://" + path;
            Connect(uri);//连接
            // 默认为true，连接不会被关闭
            // 在一个命令之后被执行
            reqFTP.KeepAlive = false;
            // 指定执行什么命令
            reqFTP.Method = WebRequestMethods.Ftp.AppendFile;
            // 上传文件时通知服务器文件的大小
            reqFTP.ContentLength = fileInf.Length;
            // 缓冲大小设置为kb
            int buffLength = 2048;
            byte[] buff = new byte[buffLength];
            int contentLen;
            // 打开一个文件流(System.IO.FileStream) 去读上传的文件
            FileStream fs = fileInf.OpenRead();
            try
            {
                StreamReader dsad = new StreamReader(fs);
                fs.Seek(size, SeekOrigin.Begin);
                // 把上传的文件写入流
                Stream strm = reqFTP.GetRequestStream();
                // 每次读文件流的kb
                contentLen = fs.Read(buff, 0, buffLength);
                // 流内容没有结束
                while (contentLen != 0)
                {
                    // 把内容从file stream 写入upload stream
                    strm.Write(buff, 0, contentLen);
                    contentLen = fs.Read(buff, 0, buffLength);
                }
                // 关闭两个流
                strm.Close();
                fs.Close();
                errorinfo = "完成";
                return true;
            }
            catch (Exception ex)
            {
                errorinfo = string.Format("因{0},无法完成上传", ex.Message);
                return false;
            }
        }
        #endregion

        #region 下载文件
        /// <summary>
        /// 下载文件
        /// </summary>
        /// <param name="filePath"></param>
        /// <param name="fileName"></param>
        /// <param name="errorinfo"></param>
        /// <returns></returns>
        public bool Download(string ftpfilepath, string filePath, string fileName, out string errorinfo)////上面的代码实现了从ftp服务器下载文件的功能
        {
            try
            {
                filePath = filePath.Replace("我的电脑\\", "");
                String onlyFileName = Path.GetFileName(fileName);
                string newFileName = filePath + onlyFileName;
                if (File.Exists(newFileName))
                {
                    errorinfo = string.Format("本地文件{0}已存在,无法下载", newFileName);
                    return false;
                }
                ftpfilepath = ftpfilepath.Replace("\\", "/");
                string url = "ftp://" + ftpfilepath;
                Connect(url);//连接
                reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
                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);
                FileStream outputStream = new FileStream(newFileName, FileMode.Create);
                while (readCount > 0)
                {
                    outputStream.Write(buffer, 0, readCount);
                    readCount = ftpStream.Read(buffer, 0, bufferSize);
                }
                ftpStream.Close();
                outputStream.Close();
                response.Close();
                errorinfo = "";
                return true;
            }
            catch (Exception ex)
            {
                errorinfo = string.Format("因{0},无法下载", ex.Message);
                return false;
            }
        }
        #endregion

        #region 删除文件
        /// <summary>
        /// 删除文件
        /// </summary>
        /// <param name="fileName"></param>
        public void DeleteFileName(string fileName)
        {
            try
            {
                FileInfo fileInf = new FileInfo(fileName);
                string uri = "ftp://" + ftpServerIP + "/" + fileInf.Name;
                Connect(uri);//连接
                // 默认为true，连接不会被关闭
                // 在一个命令之后被执行
                reqFTP.KeepAlive = false;
                // 指定执行什么命令
                reqFTP.Method = WebRequestMethods.Ftp.DeleteFile;
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                response.Close();
            }
            catch (Exception ex)
            {
                //MessageBox.Show(ex.Message, "删除错误");
            }
        }
        #endregion

        #region 在ftp上创建目录
        /// <summary>
        /// 在ftp上创建目录
        /// </summary>
        /// <param name="dirName"></param>
        public void MakeDir(string dirName)
        {
            try
            {
                string uri = "ftp://" + ftpServerIP +"/" + dirName;
                Connect(uri);//连接
                reqFTP.Method = WebRequestMethods.Ftp.MakeDirectory;
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                response.Close();
            }
            catch (Exception ex)
            {
                //不输出异常，目前ftp只支持多级目录的一层层创建
                //Loger.Debug(ex);
            }
        }
        #endregion

        #region 删除ftp上目录
        /// <summary>
        /// 删除ftp上目录
        /// </summary>
        /// <param name="dirName"></param>
        public void delDir(string dirName)
        {
            try
            {
                string uri = "ftp://" + ftpServerIP + "/" + dirName;
                Connect(uri);//连接
                reqFTP.Method = WebRequestMethods.Ftp.RemoveDirectory;
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                response.Close();
            }
            catch (Exception ex)
            {
                // MessageBox.Show(ex.Message);
            }
        }
        #endregion

        #region 获得ftp上文件大小
        /// <summary>
        /// 获得ftp上文件大小
        /// </summary>
        /// <param name="filename"></param>
        /// <returns></returns>
        public long GetFileSize(string filename)
        {
            long fileSize = 0;
            filename = filename.Replace("\\", "/");
            try
            {
                // FileInfo fileInf = new FileInfo(filename);
                //string uri1 = "ftp://" + ftpServerIP + "/" + fileInf.Name;
                // string uri = filename;
                string uri = "ftp://" + filename;
                Connect(uri);//连接
                reqFTP.Method = WebRequestMethods.Ftp.GetFileSize;
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                fileSize = response.ContentLength;
                response.Close();
            }
            catch (Exception ex)
            {
                // MessageBox.Show(ex.Message);
            }
            return fileSize;
        }
        #endregion

        #region ftp上文件改名
        /// <summary>
        /// ftp上文件改名
        /// </summary>
        /// <param name="currentFilename"></param>
        /// <param name="newFilename"></param>
        public void Rename(string currentFilename, string newFilename)
        {
            try
            {
                FileInfo fileInf = new FileInfo(currentFilename);
                string uri = "ftp://" + ftpServerIP + "/" + fileInf.Name;
                Connect(uri);//连接
                reqFTP.Method = WebRequestMethods.Ftp.Rename;
                reqFTP.RenameTo = newFilename;
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                //Stream ftpStream = response.GetResponseStream();
                //ftpStream.Close();
                response.Close();
            }
            catch (Exception ex)
            {
                // MessageBox.Show(ex.Message);
            }
        }
        #endregion

        #region 获得文件明晰
        /// <summary>
        /// 获得文件明晰
        /// </summary>
        /// <returns></returns>
        public string[] GetFilesDetailList()
        {
            return GetFileList("ftp://" + ftpServerIP + "/", WebRequestMethods.Ftp.ListDirectoryDetails);
        }
        /// <summary>
        /// 获得文件明晰
        /// </summary>
        /// <param name="path"></param>
        /// <returns></returns>
        public string[] GetFilesDetailList(string path)
        {
            path = path.Replace("\\", "/");
            return GetFileList("ftp://" + path, WebRequestMethods.Ftp.ListDirectoryDetails);
        }
        #endregion
    }

在webconfig里面 直接配置如下就能使用了。。直接源码提供。。O(∩_∩)O哈哈~

  <add key="FileSaveBasePath" value="D:\web\Content" />
    <add key="FtpUpload" value="false"/>
    <add key="FtpServerIP" value="127.0.0.1"/>
    <add key="FtpUserId" value="settingftp"/>
    <add key="FtpPassword" value="/psw"/>
    <add key="FtpHtmlBasePath" value=""/>
    <add key="FtpFileBasePath" value="test"/>