C# FTP断点续传上传文件实现代码
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在C#中进行FTP断点续传上传文件的过程如下所示:
以下是一个基本的示例代码片段,展示了如何在C#中实现FTP断点续传上传文件: using System; using System.IO; using System.Net;
class Program { static void Main(string[] args) { string ftpServer = "ftp://example.com"; // FTP服务器地址 string username = "username"; // FTP登录用户名 string password = "password"; // FTP登录密码
string localFilePath = @"C:\path\to\localfile.txt"; // 本地文件路径 string remoteDirectory = "/remote/directory/"; // 远程目录路径 string fileName = Path.GetFileName(localFilePath); // 文件名称
try { using (var fileStream = File.OpenRead(localFilePath)) { var requestUriBuilder = new UriBuilder(ftpServer + remoteDirectory + fileName);
if (!IsRemoteFileExists(requestUriBuilder.ToString(), username, password)) { UploadWholeFile(requestUriBuilder.ToString(), fileStream, username, password); } else { long uploadedSize = GetUploadedSize(requestUriBuilder.ToString());
if (uploadedSize > 0 && uploadedSize < fileStream.Length) { ResumeUploadFromPosition(requestUriBuilder.ToString(), fileStream, uploadedSize, username, password); } else { Console.WriteLine("The file is already fully uploaded."); } } }
Console.WriteLine("File upload completed successfully!"); } catch (Exception ex) { Console.WriteLine($"An error occurred during the file upload process: {ex}"); } }
private static bool IsRemoteFileExists(string url, string userName, string password) { var request = (FtpWebRequest)WebRequest.Create(url); request.Method = WebRequestMethods.Ftp.ListDirectoryDetails; request.Credentials = new NetworkCredential(userName, password);
try { using (var response = (FtpWebResponse)request.GetResponse()) { return true; } } catch (WebException) { return false; } }
private static 该文章在 2024/1/12 16:21:56 编辑过 |
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