C# 服务器间读取上传图片实现
由于项目使用了负载，所以有这样的需求，需要把文件保存到同一个服务器下，然后去指定的服务器读取文件。
我经过了一些搜索，找到了2个办法来实现。一种是使用共享文件夹的方式，还有一种是使用FTP协议去传输文件。
下面先记录下使用共享文件夹的方式。
首先，在指定服务器下，创建共享文件，名称为Share，把它共享给所有人，读写权限。
然后，代码如下：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Diagnostics;
namespace MB.Cloud.PosService.ServerBiz.Basic.Base
{
public class ShareFileHelper
{
public void Execute()
{
bool status = false;
//连接共享文件夹
status = connectState(@"\\10.100.20.122\Share", "用户名", "密码");
if (status)
{
//共享文件夹的目录
DirectoryInfo theFolder = new DirectoryInfo(@"\\10.100.20.122\Share");
//相对共享文件夹的路径
string fielpath = @"\123\456\";
//获取保存文件的路径
string filename = theFolder.ToString() + fielpath + "1.jpg";
string filePath = @"C:\Users\hq01ub721\Desktop\临时\";
//执行方法
Transport(filename, filePath, "3.jpg"); //这是从共享文件夹读取文件到本地
}
else
{
//ListBox1.Items.Add("未能连接！");
}
Console.ReadKey();
}
public static bool connectState(string path)
{
return connectState(path, "", "");
}
///
/// 连接远程共享文件夹
///
/// 远程共享文件夹的路径
/// 用户名
/// 密码
///
/// 向远程文件夹保存本地内容，或者从远程文件夹下载文件到本地
///
/// 要保存的文件的路径，如果保存文件到共享文件夹，这个路径就是本地文件路径如：@"D:\1.avi"
/// 保存文件的路径，不含名称及扩展名
/// 保存文件的名称以及扩展名
public static void Transport(string src, string dst, string fileName)
{
FileStream inFileStream = new FileStream(src, FileMode.Open);
if (!Directory.Exists(dst))
{
Directory.CreateDirectory(dst);
}
dst = dst + fileName;
FileStream outFileStream = new FileStream(dst, FileMode.OpenOrCreate);
byte[] buf = new byte[inFileStream.Length];
int byteCount;
while ((byteCount = inFileStream.Read(buf, 0, buf.Length)) > 0)
{
outFileStream.Write(buf, 0, byteCount);
}
inFileStream.Flush();
inFileStream.Close();
outFileStream.Flush();
outFileStream.Close();
}
}
}
首先在服务器端建立FTP站点，然后就可以通过代码，或者浏览器访问了。
代码如下：
public class FtpHelper
{
private static string FtpAddress = "10.100.20.122:21";
private static string LocalPath = @"C:\Users\ShareFileDownload";
public static void DownLoadFile(string filename)
{
FtpWebRequest req = (FtpWebRequest)WebRequest.Create("ftp://" + FtpAddress + "/" + filename);
req.Method = WebRequestMethods.Ftp.DownloadFile;
req.UseBinary = true;
req.UsePassive = true;
req.Credentials = new NetworkCredential(@"POSTEST-1203\Administrator", "pos123");
try
{
using (FtpWebResponse res = (FtpWebResponse)req.GetResponse())
{
string localfile = Path.Combine(LocalPath, filename);
FileStream fs = new FileStream(localfile, FileMode.Create, FileAccess.Write);
int buffer = 1024; //1K缓冲
byte[] b = new byte[buffer];
int i = 0;
Stream stream = res.GetResponseStream();
while ((i = stream.Read(b, 0, buffer)) > 0)
{
fs.Write(b, 0, i);
}
}
Console.WriteLine(filename + " download!");
}
catch (Exception ex)
{
Console.WriteLine(ex.ToString());
}
finally
{
}
}
///
/// 获取FTP文件列表
///
/// GetFileList()
{
List list = new List();
FtpWebRequest req = (FtpWebRequest)WebRequest.Create(new Uri("ftp://" + FtpAddress + ""));
//req.Credentials = new NetworkCredential(FtpUid, FtpPwd);
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)
{
Console.WriteLine(ex.ToString());
}
return list;
}
public static void UploadFile(string localFile)
{
FileInfo fi = new FileInfo(localFile);
FileStream fs = fi.OpenRead();
long length = fs.Length;
FtpWebRequest req = (FtpWebRequest)WebRequest.Create("ftp://" + FtpAddress + "/123/" + fi.Name);
// req.Credentials = new NetworkCredential(FtpUid, FtpPwd);
req.Method = WebRequestMethods.Ftp.UploadFile;
req.UseBinary = true;
req.ContentLength = length;
req.Timeout = 10 * 1000;
try
{
Stream stream = req.GetRequestStream();
int BufferLength = 2048; //2K
byte[] b = new byte[BufferLength];
int i;
while ((i = fs.Read(b, 0, BufferLength)) > 0)
{
stream.Write(b, 0, i);
}
stream.Close();
stream.Dispose();
}
catch (Exception ex)
{
Console.WriteLine(ex.ToString());
}
}
}