Re: [hybi] Frame size

["Thomson, Martin" <[e-mail]>]

> >     this.buffer.send(prng.getNextBits(WS.FRAME_MARKER_LEN),
> WS.FRAME_MARKER_LEN);
>	
> I don't understand how this solves the problem of people mismeasuring
> strings. (I don't really follow the pseudocode above, either.)

It does this (or significantly reduces the changes of this) by marking the start of a frame with a known sequence.  This sequence could be fixed, or it could be derived from a known sequence.  If this sequence isn't found where it should be, there is an error.

(BTW, I'm not advocating either approach, and I'll point out that the PRNG is most likely less useful and more complicated than a well-chosen fixed value.)

> My concern is that people will write this:
> 
>    send(WS.BINARY_FRAME);
>    send(encodeLength(data.length));
>    send(data);
> 
> ...and their system will automatically convert the string "data" to
> UTF-8.

I know.  Untyped and loosely typed languages have that problem.

--Martin