Limited size for the messages sent throw websockets?

[Horsetopus]

Hello,

I am using your library for one of my project.
Among others, one of my needs is to upload some files.

But when I send a message over a certain size from the client, the message does not reach my code in the server.
I don't get an error either, nothing.
I tried without specifying a draft, and by specifying Draft_17.

So, I have two questions:

• are there some limits on size?
• what are they?
• if the value varies, is there a way to get it at runtime?

This is not my area of expertise and I couldn't find anything clear on Google.

Thank you.

[ainslec]

Having the exact same issue. The internal buffer size appears to be 16 kilobytes, which I assumed would be chunked so that there was no limit except for JVM memory capacity. I modified this to a much higher figure (4 megabytes) whilst keeping messages sent less than 2 megabytes, and messages were still being dropped.

The protocol code is complex therefore I don't understand exactly what is happening, but for sure, there are problems with larger messages.

Horsetopus: Were you able to solve your issue?

[marci4]

Hey @Ainsley and @Horsetopus,

could you provide any simple example for me to reproduce this issue and hopefully fix it.

Can't really promise to much because I didn't implement it but I would really like to help you!

Greetings
marci4

[ainslec]

Thanks for replying to this. I'll try to put one together in the next few days.

[marci4]

possible duplicates #300 (internal for me)

[solomon-chen]

To solve the issue, you could add some codes here in WebSocketImp.java:

else if( fin ) {
if( current_continuous_frame == null )
...
if( current_continuous_frame.getOpcode() == Opcode.TEXT ) {
...
if( !Charsetfunctions.isValidUTF8( current_continuous_frame.getPayloadData(), off ) ) {
throw new InvalidDataException( CloseFrame.NO_UTF8 );
}

//begin
try {
wsl.onWebsocketMessage( this, Charsetfunctions.stringUtf8( current_continuous_frame.getPayloadData() ) );
} catch ( RuntimeException e ) {
wsl.onWebsocketError( this, e );
}
//end

[marci4]

Hello @solomon-chen ,

I ran into the same idea while trying to complete all the testcases in the autobahn testsuite.

This caused some problems with fragmented byte frames as far as I remember.

Could you please provide an example code, when a specific message is not working any more?

Greetings
marci4

[marci4]

Could you please check if #570 is fixing this issue for you?

Greetings
marci4

[marci4]

This issue should be solved. If not feel free to open a new issue!

Greetings
marci4