CS中前台是C#，后天是Java或 C# 现在要上传文件，大概思路
我们前台是C#客户端，后台是Java的。如果不知道java的话，就把后台当做C#。
现在明确要求了不用http协议的，要是用的http协议的话，就好点，只需传到网页中，在网页中操作。
所以就只有ftp了，现在对ftp不了解，我能做的是在前台把文件转成文件流，或者二进制流，然后该怎么弄呢？
服务端又该怎么接受？
有接触过FTP协议的，说下思路。 谢谢指点一二。
或者有什么例子。
[解决办法]
- C# code
using System;using System.Net;using System.Threading;using System.IO;namespace Examples.System.Net{ public class FtpState { private ManualResetEvent wait; private FtpWebRequest request; private string fileName; private Exception operationException = null; string status; public FtpState() { wait = new ManualResetEvent(false); } public ManualResetEvent OperationComplete { get {return wait;} } public FtpWebRequest Request { get {return request;} set {request = value;} } public string FileName { get {return fileName;} set {fileName = value;} } public Exception OperationException { get {return operationException;} set {operationException = value;} } public string StatusDescription { get {return status;} set {status = value;} } } public class AsynchronousFtpUpLoader { // Command line arguments are two strings: // 1. The url that is the name of the file being uploaded to the server. // 2. The name of the file on the local machine. // public static void Main(string[] args) { // Create a Uri instance with the specified URI string. // If the URI is not correctly formed, the Uri constructor // will throw an exception. ManualResetEvent waitObject; Uri target = new Uri (args[0]); string fileName = args[1]; FtpState state = new FtpState(); FtpWebRequest request = (FtpWebRequest)WebRequest.Create(target); request.Method = WebRequestMethods.Ftp.UploadFile; // This example uses anonymous logon. // The request is anonymous by default; the credential does not have to be specified. // The example specifies the credential only to // control how actions are logged on the server. request.Credentials = new NetworkCredential ("anonymous","janeDoe@contoso.com"); // Store the request in the object that we pass into the // asynchronous operations. state.Request = request; state.FileName = fileName; // Get the event to wait on. waitObject = state.OperationComplete; // Asynchronously get the stream for the file contents. request.BeginGetRequestStream( new AsyncCallback (EndGetStreamCallback), state ); // Block the current thread until all operations are complete. waitObject.WaitOne(); // The operations either completed or threw an exception. if (state.OperationException != null) { throw state.OperationException; } else { Console.WriteLine("The operation completed - {0}", state.StatusDescription); } } private static void EndGetStreamCallback(IAsyncResult ar) { FtpState state = (FtpState) ar.AsyncState; Stream requestStream = null; // End the asynchronous call to get the request stream. try { requestStream = state.Request.EndGetRequestStream(ar); // Copy the file contents to the request stream. const int bufferLength = 2048; byte[] buffer = new byte[bufferLength]; int count = 0; int readBytes = 0; FileStream stream = File.OpenRead(state.FileName); do { readBytes = stream.Read(buffer, 0, bufferLength); requestStream.Write(buffer, 0, readBytes); count += readBytes; } while (readBytes != 0); Console.WriteLine ("Writing {0} bytes to the stream.", count); // IMPORTANT: Close the request stream before sending the request. requestStream.Close(); // Asynchronously get the response to the upload request. state.Request.BeginGetResponse( new AsyncCallback (EndGetResponseCallback), state ); } // Return exceptions to the main application thread. catch (Exception e) { Console.WriteLine("Could not get the request stream."); state.OperationException = e; state.OperationComplete.Set(); return; } } // The EndGetResponseCallback method // completes a call to BeginGetResponse. private static void EndGetResponseCallback(IAsyncResult ar) { FtpState state = (FtpState) ar.AsyncState; FtpWebResponse response = null; try { response = (FtpWebResponse) state.Request.EndGetResponse(ar); response.Close(); state.StatusDescription = response.StatusDescription; // Signal the main application thread that // the operation is complete. state.OperationComplete.Set(); } // Return exceptions to the main application thread. catch (Exception e) { Console.WriteLine ("Error getting response."); state.OperationException = e; state.OperationComplete.Set(); } } }}
[解决办法]
http可以不仅仅是网页上上传啊...
backend
- C# code
[AcceptVerbs(HttpVerbs.Post)] public void Push(string id) { string appName = id.Split('.')[0]; string targetFolder = Path.Combine(Server.MapPath("/Apps"), appName); if (!Directory.Exists(targetFolder)) { Directory.CreateDirectory(targetFolder); } var buffer = new byte[4096]; using (FileStream fs = new FileStream(Path.Combine(targetFolder, id), FileMode.Create)) { while (true) { int r = Request.InputStream.Read(buffer, 0, 4096); if (r <= 0) { break; } fs.Write(buffer, 0, r); } } }
[解决办法]
Java 实现一个 servlet 毫无压力啊。前台 C# 用 HttpWebRequest 进行 multiple-data-form 模拟提交即可。
[解决办法]
你可以看msdn: http://msdn.microsoft.com/zh-cn/library/system.net.webclient(v=vs.80).aspx
它的例子甚至就是ftp的。
而比较麻烦的FtpWebRequest方法，可以看msdn:http://msdn.microsoft.com/zh-cn/library/system.net.ftpwebrequest(v=vs.80).aspx