?
Solved

Best way of transferring files using socket

Posted on 2010-09-14
4
Medium Priority
?
354 Views
Last Modified: 2013-11-05
What is the best of of transferring files through sockets? i am a little confused about it as i don't want to lost my file while transferring.
0
Comment
Question by:muhammadyasir
  • 2
4 Comments
 
LVL 1

Expert Comment

by:golftech
ID: 33675452
What are you trying to do?
0
 
LVL 5

Author Comment

by:muhammadyasir
ID: 33675624
i want to update my client software by sending files to client.
0
 
LVL 5

Author Comment

by:muhammadyasir
ID: 33675656
also i need to send some important files from client side to server.
0
 
LVL 5

Accepted Solution

by:
andr_gin earned 2000 total points
ID: 33680832
You should create a protocol for sending the files. I have following convention for data exchange via TCP:

Byte 1: Type of the message implemented as an Enumeration (for example SendFile=4)
Byte 2 to 5: Length of the information
Byte 6 to x: Information

FileContent can be embedded between these messages.
If you are concerned about extra safety you can calculate a checksum while reading.
Use the class MD5CryptoServiceProvider.

Example:
01 (SendFile)
00 00 00 30 (24 Bytes Data)
Filename (24 bytes), encode with System.Text.Encoding.UTF8.GetBytes

02 (FileLength)
00 00 00 08 (8 Bytes Length)
00 00 00 00 00 01 00 00 (64KB file)

64K bytes FileContent

03 (MD5 key)
00 00 00 10 (16 bytes = 128bit MD5 key)
MD5 key of file

The client first checks if byte1 is what he expects. If this is not correct you have lost synchronization and should terminate the connection.
Then the client reads 4 Bytes with the length.
Then he knows how long the filename is.
Then he reads the filename.
The next message is the length
Then the file content is embedded
Then the next message is the md5 key (calculated by server & client while transmitting data).
0

Featured Post

Free Tool: Site Down Detector

Helpful to verify reports of your own downtime, or to double check a downed website you are trying to access.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

It was really hard time for me to get the understanding of Delegates in C#. I went through many websites and articles but I found them very clumsy. After going through those sites, I noted down the points in a easy way so here I am sharing that unde…
The article shows the basic steps of integrating an HTML theme template into an ASP.NET MVC project
When you have multiple client accounts to manage, it often feels like there aren’t enough hours in the day. With too many applications to juggle, you can’t focus on your clients, much less your growing to-do list. But that doesn’t have to be the cas…
Watch the video to know the process of migration of Exchange or Office 365 mailboxes in absence of MS Outlook. It is an eminent tool which can easily migrate Public, Archive user mailboxes from one another Exchange server and Office 365. Kernel Migr…

589 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question