Win a copy of Re-engineering Legacy Software this week in the Refactoring forum
or Docker in Action in the Cloud/Virtualization forum!
  • Post Reply
  • Bookmark Topic Watch Topic
  • New Topic

client-server file exchange

 
Haritha Gorijavolu
Greenhorn
Posts: 21
Debian Java Linux
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
The following are the codes for client and server to exchange a file. It works like this: The client sends a connection request and the server begins to transfer the file and the client just recieves the file. The location of the file and the size of the file are predefined, for the sake of simplicity.

How is it that the client reads from the InputStream only after the Server sends the data and not before it sends data? How does it know when to start reading from InputStream? I am presently running the client and server on local host and the code is working fine.

client code:


Server code:

 
Rob Spoor
Sheriff
Pie
Posts: 20495
54
Chrome Eclipse IDE Java Windows
  • Likes 1
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Haritha Gorijavolu wrote:How is it that the client reads from the InputStream only after the Server sends the data and not before it sends data? How does it know when to start reading from InputStream?

What would it read if the server hasn't sent anything yet? The read method simply blocks until some data is available. Be aware that this may not everything that was sent; some bytes may still be on their way. That's why you usually should read in while loops.
 
Haritha Gorijavolu
Greenhorn
Posts: 21
Debian Java Linux
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Got it. Thanks for explaining.
 
Rob Spoor
Sheriff
Pie
Posts: 20495
54
Chrome Eclipse IDE Java Windows
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
You're welcome.
 
  • Post Reply
  • Bookmark Topic Watch Topic
  • New Topic