為什么80%的碼農(nóng)都做不了架構(gòu)師？>>> ??

系統(tǒng)設計中我們經(jīng)常要考慮文件上傳，但是存在兩個讓人討厭的麻煩：

第一：負載均衡

第二：備份

第三：擴展

平常我們是這樣上傳，使用控件UploadFile，然后saveas就完了，但是這樣我們就有上面三個麻煩

如果上傳的人很多，服務器硬盤很快滿；文件增長很快，我們不好管理，更不好備份很多的上傳文件；如果無限制擴展呢？機器的磁盤滿了，不限制的加磁盤呢？

自然就想到使用NAS（網(wǎng)絡附加存儲）或者SAN，如果我們使用NAS或者SAN，哪么就存在一個問題：代碼運行環(huán)境和文件存儲的環(huán)境不在一個ASP.NET進程里面，常見有以下兩種解決方案：

第一種方法：使用ftp上傳，當然這個ftp是編程方式實現(xiàn)

第二種方法：網(wǎng)絡共享方式，多見于linux通過mount掛載硬盤

ASP也可以使用這兩種方法，這里先介紹使用FTP方式上傳，網(wǎng)絡共享方式上傳，我現(xiàn)在還沒有做出成功的DEMO來，FTP已經(jīng)可以，代碼如下

using System;

using System.Collections.Generic;

using System.Text;

using System.Net;

using System.Data;

using System.IO;

using System.ComponentModel;

namespace Common

{

public class FTPClient

{

private string ftpServerIP = String.Empty;

private string ftpUser = String.Empty;

private string ftpPassword = String.Empty;

private string ftpRootURL = String.Empty;

public FTPClient()

{

this.ftpServerIP = @"192.168.202.102";

this.ftpUser = "dxfhly";

this.ftpPassword = "sureme";

this.ftpRootURL = "ftp://"; + ftpServerIP + "/";

}

/// <summary>

/// 上傳

/// </summary>

/// <param name="localFile">本地文件絕對路徑</param>

/// <param name="ftpPath">上傳到ftp的路徑</param>

/// <param name="ftpFileName">上傳到ftp的文件名</param>

public bool fileUpload(FileInfo localFile, string ftpPath, string ftpFileName)

{

bool success = false;

FtpWebRequest ftpWebRequest = null;

FileStream localFileStream = null;

Stream requestStream = null;

try

{

string uri = ftpRootURL + ftpPath + ftpFileName;

ftpWebRequest = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));

ftpWebRequest.Credentials = new NetworkCredential(ftpUser, ftpPassword);

ftpWebRequest.UseBinary = true;

ftpWebRequest.KeepAlive = false;

ftpWebRequest.Method = WebRequestMethods.Ftp.UploadFile;

ftpWebRequest.ContentLength = localFile.Length;

int buffLength = 2048;

byte[] buff = new byte[buffLength];

int contentLen;

localFileStream = localFile.OpenRead();

requestStream = ftpWebRequest.GetRequestStream();

contentLen = localFileStream.Read(buff, 0, buffLength);

while (contentLen != 0)

{

requestStream.Write(buff, 0, contentLen);

contentLen = localFileStream.Read(buff, 0, buffLength);

}

success = true;

}

catch (Exception)

{

success = false;

}

finally

{

if (requestStream != null)

{

requestStream.Close();

}

if (localFileStream != null)

{

localFileStream.Close();

}

}

return success;

}

/// <summary>

/// 上傳文件

/// </summary>

/// <param name="localPath">本地文件地址(沒有文件名)</param>

/// <param name="localFileName">本地文件名</param>

/// <param name="ftpPath">上傳到ftp的路徑</param>

/// <param name="ftpFileName">上傳到ftp的文件名</param>

public bool fileUpload(string localPath, string localFileName, string ftpPath, string ftpFileName)

{

bool success = false;

try

{

FileInfo localFile = new FileInfo(localPath + localFileName);

if (localFile.Exists)

{

success = fileUpload(localFile, ftpPath, ftpFileName);

}

else

{

success = false;

}

}

catch (Exception)

{

success = false;

}

return success;

}

/// <summary>

/// 下載文件

/// </summary>

/// <param name="localPath">本地文件地址(沒有文件名)</param>

/// <param name="localFileName">本地文件名</param>

/// <param name="ftpPath">下載的ftp的路徑</param>

/// <param name="ftpFileName">下載的ftp的文件名</param>

public bool fileDownload(string localPath, string localFileName, string ftpPath, string ftpFileName)

{

bool success = false;

FtpWebRequest ftpWebRequest = null;

FtpWebResponse ftpWebResponse = null;

Stream ftpResponseStream = null;

FileStream outputStream = null;

try

{

outputStream = new FileStream(localPath + localFileName, FileMode.Create);

string uri = ftpRootURL + ftpPath + ftpFileName;

ftpWebRequest = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));

ftpWebRequest.Credentials = new NetworkCredential(ftpUser, ftpPassword);

ftpWebRequest.UseBinary = true;

ftpWebRequest.Method = WebRequestMethods.Ftp.DownloadFile;

ftpWebResponse = (FtpWebResponse)ftpWebRequest.GetResponse();

ftpResponseStream = ftpWebResponse.GetResponseStream();

long contentLength = ftpWebResponse.ContentLength;

int bufferSize = 2048;

byte[] buffer = new byte[bufferSize];

int readCount;

readCount = ftpResponseStream.Read(buffer, 0, bufferSize);

while (readCount > 0)

{

outputStream.Write(buffer, 0, readCount);

readCount = ftpResponseStream.Read(buffer, 0, bufferSize);

}

success = true;

}

catch (Exception)

{

success = false;

}

finally

{

if (outputStream != null)

{

outputStream.Close();

}

if (ftpResponseStream != null)

{

ftpResponseStream.Close();

}

if (ftpWebResponse != null)

{

ftpWebResponse.Close();

}

}

return success;

}

/// <summary>

/// 重命名

/// </summary>

/// <param name="ftpPath">ftp文件路徑</param>

/// <param name="currentFilename"></param>

/// <param name="newFilename"></param>

public bool fileRename(string ftpPath, string currentFileName, string newFileName)

{

bool success = false;

FtpWebRequest ftpWebRequest = null;

FtpWebResponse ftpWebResponse = null;

Stream ftpResponseStream = null;

try

{

string uri = ftpRootURL + ftpPath + currentFileName;

ftpWebRequest = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));

ftpWebRequest.Credentials = new NetworkCredential(ftpUser, ftpPassword);

ftpWebRequest.UseBinary = true;

ftpWebRequest.Method = WebRequestMethods.Ftp.Rename;

ftpWebRequest.RenameTo = newFileName;

ftpWebResponse = (FtpWebResponse)ftpWebRequest.GetResponse();

ftpResponseStream = ftpWebResponse.GetResponseStream();

}

catch (Exception)

{

success = false;

}

finally

{

if (ftpResponseStream != null)

{

ftpResponseStream.Close();

}

if (ftpWebResponse != null)

{

ftpWebResponse.Close();

}

}

return success;

}

/// <summary>

/// 消除文件

/// </summary>

/// <param name="filePath"></param>

public bool fileDelete(string ftpPath, string ftpName)

{

bool success = false;

FtpWebRequest ftpWebRequest = null;

FtpWebResponse ftpWebResponse = null;

Stream ftpResponseStream = null;

StreamReader streamReader = null;

try

{

string uri = ftpRootURL + ftpPath + ftpName;

ftpWebRequest = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));

ftpWebRequest.Credentials = new NetworkCredential(ftpUser, ftpPassword);

ftpWebRequest.KeepAlive = false;

ftpWebRequest.Method = WebRequestMethods.Ftp.DeleteFile;

ftpWebResponse = (FtpWebResponse)ftpWebRequest.GetResponse();

long size = ftpWebResponse.ContentLength;

ftpResponseStream = ftpWebResponse.GetResponseStream();

streamReader = new StreamReader(ftpResponseStream);

string result = String.Empty;

result = streamReader.ReadToEnd();

success = true;

}

catch (Exception)

{

success = false;

}

finally

{

if (streamReader != null)

{

streamReader.Close();

}

if (ftpResponseStream != null)

{

ftpResponseStream.Close();

}

if (ftpWebResponse != null)

{

ftpWebResponse.Close();

}

}

return success;

}

/// <summary>

/// 文件存在檢查

/// </summary>

/// <param name="ftpPath"></param>

/// <param name="ftpName"></param>

/// <returns></returns>

public bool fileCheckExist(string ftpPath, string ftpName)

{

bool success = false;

FtpWebRequest ftpWebRequest = null;

WebResponse webResponse = null;

StreamReader reader = null;

try

{

string url = ftpRootURL + ftpPath;

ftpWebRequest = (FtpWebRequest)FtpWebRequest.Create(new Uri(url));

ftpWebRequest.Credentials = new NetworkCredential(ftpUser, ftpPassword);

ftpWebRequest.Method = WebRequestMethods.Ftp.ListDirectory;

ftpWebRequest.KeepAlive = false;

webResponse = ftpWebRequest.GetResponse();

reader = new StreamReader(webResponse.GetResponseStream());

string line = reader.ReadLine();

while (line != null)

{

if (line == ftpName)

{

success = true;

break;

}

line = reader.ReadLine();

}

}

catch (Exception)

{

success = false;

}

finally

{

if (reader != null)

{

reader.Close();

}

if (webResponse != null)

{

webResponse.Close();

}

}

return success;

}

}

}

using System;

using System.Data;

using System.Configuration;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;

using System.IO;

using System.Net;

public partial class _Default : System.Web.UI.Page

{

protected void Page_Load(object sender, EventArgs e)

{

/*

//建立目錄

FtpWebRequest Request = (FtpWebRequest)WebRequest.Create("ftp://192.168.202.102/dreamworld/test";);

Request.Credentials = new NetworkCredential("dxfhly", "sureme");

Request.Method = WebRequestMethods.Ftp.MakeDirectory;

Request.Timeout = (60000 * 1); //60000 * 1,表示1分鐘

FtpWebResponse Response = (FtpWebResponse)Request.GetResponse();

Response.Close();

//刪除目錄

Request = (FtpWebRequest)WebRequest.Create("ftp://192.168.202.102/dreamworld/test";);

Request.Credentials = new NetworkCredential("dxfhly", "sureme");

Request.Method = WebRequestMethods.Ftp.RemoveDirectory;

Request.Timeout = (60000 * 1); //60000 * 1,表示1分鐘

Response = (FtpWebResponse)Request.GetResponse();

Response.Close();

*/

/*

//修改文件名

Request = (FtpWebRequest)WebRequest.Create("ftp://192.168.202.102/dreamworld/ssa.txt";);

Request.Credentials = new NetworkCredential("dxfhly","sureme");

Request.Method = WebRequestMethods.Ftp.Rename;

Request.Timeout = (60000 * 1); //60000 * 1,表示1分鐘

Request.RenameTo = "NewName.txt";

Response = (FtpWebResponse)Request.GetResponse();

Response.Close();

//修改目錄名

Request = (FtpWebRequest)WebRequest.Create("ftp://192.168.202.102/dreamworld/test";);

Request.Credentials = new NetworkCredential("dxfhly","sureme");

Request.Method = WebRequestMethods.Ftp.Rename;

Request.Timeout = (60000 * 1); //60000 * 1,表示1分鐘

Request.RenameTo = "test2";

Response = (FtpWebResponse)Request.GetResponse();

Response.Close();

//刪除文件

Request = (FtpWebRequest)WebRequest.Create("ftp://192.168.202.102/dreamworld/NewName.txt";);

Request.Credentials = new NetworkCredential("dxfhly","sureme");

Request.Method = WebRequestMethods.Ftp.DeleteFile;

Request.Timeout = (60000 * 1); //60000 * 1,表示1分鐘

Response = (FtpWebResponse)Request.GetResponse();

Response.Close();

//上傳文件

Request = (FtpWebRequest)WebRequest.Create("ftp://192.168.202.102/dreamworld/";);

Request.Credentials = new NetworkCredential("dxfhly","sureme");

Request.Method = WebRequestMethods.Ftp.UploadFile;

Stream sourcestream=

sourcestream= Request.GetRequestStream();

Request.Timeout = (60000 * 1); //60000 * 1,表示1分鐘

Response = (FtpWebResponse)Request.GetResponse();

Response.Close();

*/

}

protected void Button1_Click(object sender, EventArgs e)

{

// FileUpload1.SaveAs(@"\\192.168.202.42\testshare");

//FileUpload1.SaveAs(@"Z:\test");

//上傳文件

Common.FTPClient ftpclient = new Common.FTPClient();

FileInfo finfo = new FileInfo(@"F:\dxf\BIND9.3.2-P2.nt4.rar");

ftpclient.fileUpload(finfo, "/dreamworld/", "BIND9.3.2-P2.nt4.rar");

}

}

你可以根據(jù)你的實際需要修改一下，就可以使用ftp方式上傳文件了

轉(zhuǎn)載于:https://my.oschina.net/dxf/blog/272

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