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08.14.2008 at 07:30AM PDT, ID: 23648236 | Points: 125

	[x] Attachment Details

Transferring binary file across socket in network corrupting file at the othe end

Asked by upsilon_matt in Peer to Peer, TCP/IP

Tags: Java, C#, C, PHP, Mozilla FireFox

Hi There,

I am developing some code that will be used to transfer a binary file from one machine to another on the local network. When the client connects to the server on localhost the file ALWAYS transfers correctly, unfortunately when connecting to a remote machine on the same LAN only some files transfer OK; others transfer but end up getting corrupted or not transferred properly over. I am transferring media files (image files, movies, etc)

The following is the code I am using: I am initializing the BinaryReader and Writers from the Network stream object obtained from the socket object like so:

       NetworkStream networkStream = socketForServer.GetStream();;
       StreamReader streamReader = new System.IO.StreamReader(networkStream);
       StreamWriter streamWriter = new System.IO.StreamWriter(networkStream);

socketForServer.ReceiveTimeout = 5000;

       BinaryWriter bw = new BinaryWriter(networkStream);

The stream writers are used to send the file size and other commands, so in sequence:

1) Initialize socket connection to server
2) Initiailize stream writers, readers and binary writers and readers
3) Send command like (SENDMEDIA)
4) Send file size as a string, other side convert to int using convert.toint32
5) Call the appropriate functions below (readbinary receives, writebinary writes)

Please help!Start Free Trial

         
           
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             public static bool writeBinary(BinaryWriter bw, FileStream myFile)
        {
        	try
        	{
	        	long ii = 0;
 
	        	byte[] myData = new byte[myFile.Length];
	        	
	        	//myFile.Read(myData,0,Convert.ToInt32(myFile.Length));
	        	
	        	while(ii < myFile.Length)
	        	{
	        		myData[ii] = (byte)myFile.ReadByte(); //br.ReadByte();
	        		//bw.Write(
	        		//bw.Flush();
	        		ii++;
	        	}	        	
	        	
	        	bw.Write(myData);
	        	bw.Flush();
	        	
	        	return true;
        	}
        	catch(Exception ex)
        	{        	
        		MessageBox.Show(ex.ToString());
        		return false;
        	}
        }
        
public static bool readBinary(BinaryReader br, String fileName, int byteSize)
        {
        	try
        	{        		
	        	String storPath = fileName;
	        	
	        	if(File.Exists(storPath))
	        		File.Delete(storPath);
	        		
	        	FileStream fs = new FileStream(storPath,FileMode.CreateNew, FileAccess.Write);
	        	
	        	BinaryWriter sw = new BinaryWriter(fs);
	        	
	        	//for(int ii = 0; ii < byteSize; ii++)
	        	//{
	        	//	byte inChar = (byte)br.ReadByte();
	        	//	sw.Write(inChar);
	        	//}
	        	
	        	byte[] byteData = br.ReadBytes(byteSize);
		        sw.Write(byteData);
		        	
	        	sw.Close();
	        	fs.Close();   
	        	
	        	return true;
        	}
        	catch(Exception ex)
        	{
        		MessageBox.Show(ex.ToString());
        		return false;
        	}
        	
        }

           
         

Keywords: Transferring binary file across socket i…

	Title
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