how to send data in chunks from server and client in java

Posted on 2011-03-07
Last Modified: 2013-11-23
if the file i request is too large, the client need to wait very long. what does to be modify from my code in order to receive the data in chunks.
e.g. transmit 100MB into 10MB each chunk in order for me to process
int len=0;
        byte [] mybytearray  = new byte [buffer];
        InputStream is = connection.getInputStream();
        FileOutputStream fos = new FileOutputStream("default.amc");
        BufferedOutputStream bos = new BufferedOutputStream(fos);

 while(( > 0)
         long end = System.currentTimeMillis();

Open in new window

Question by:jackson_duffy
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 5
  • 4
LVL 92

Expert Comment

ID: 35054550
To support sending data in chunks would also require modifying the client to support receive the data in chunks
Changes to the server would be to support specifying the start byte and the number of bytes to send.

>  while(( > 0)

btw, that should be:

 while(( >= 0)
LVL 92

Expert Comment

ID: 35054598

Author Comment

ID: 35054693
my server side codes are shown below.
with my current codes. i only able to see the received file at the client folder when the file is received fully
Please advise any changes needed. thanks
byte[] bytes = new byte[65536];
                File file = new File("test.txt");
                FileInputStream bis = new FileInputStream(file);
                BufferedInputStream in = new BufferedInputStream(bis);
                OutputStream out = connection.getOutputStream();
                DataOutputStream dout = new DataOutputStream(out);
                //now send the length (as a simple long)
                long numToSend = file.length();
                //now send the file contents
                long numSent = 0;
                while(numSent < numToSend) {
                   long numThisTime = numToSend - numSent;
                   numThisTime = numThisTime < bytes.length ? numThisTime : bytes.length;
                   int numRead =, 0, (int) numThisTime);
                   if(numRead ==-1 ) break;
                   numSent += numRead;

Open in new window

Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!


Author Comment

ID: 35065313
any amends to my codes is needed??
LVL 92

Expert Comment

ID: 35065693
not sure what you need.

Author Comment

ID: 35065726
i am sorry.
what i am trying to ask is how to i send and receive file in chunks using a server and client architecture. and what do i have to take note of especially for the server side which is send data and the client side which is to receive data.
as you mentioned, for the send data portion, do the server have to send data in chunks too in order for the client to receive the data in chunks? or what should be done?
LVL 92

Expert Comment

ID: 35065874
first step would be to design the protocol used by the client and server to communicate. Not much point writing any code until you decide how the two are going to communicate.

Author Comment

ID: 35066122
the protocol is udp
LVL 92

Accepted Solution

objects earned 500 total points
ID: 35066377
I meant the application protocol that the client and server will use when communicating.

heres an example od a simple udp client server setup.

Featured Post

PeopleSoft Has Never Been Easier

PeopleSoft Adoption Made Smooth & Simple!

On-The-Job Training Is made Intuitive & Easy With WalkMe's On-Screen Guidance Tool.  Claim Your Free WalkMe Account Now

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Apache Camel - Unable to propagate JMS Header Properties between Request - Response 3 19
swing controls 2 24
Running JavaFX on the Raspberry Pi 27 150
Java array 10 65
An old method to applying the Singleton pattern in your Java code is to check if a static instance, defined in the same class that needs to be instantiated once and only once, is null and then create a new instance; otherwise, the pre-existing insta…
Java contains several comparison operators (e.g., <, <=, >, >=, ==, !=) that allow you to compare primitive values. However, these operators cannot be used to compare the contents of objects. Interface Comparable is used to allow objects of a cl…
Viewers will learn about if statements in Java and their use The if statement: The condition required to create an if statement: Variations of if statements: An example using if statements:
Viewers will learn how to properly install Eclipse with the necessary JDK, and will take a look at an introductory Java program. Download Eclipse installation zip file: Extract files from zip file: Download and install JDK 8: Open Eclipse and …

730 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