interfacing wxSockets with data from Java's stream Topic is solved

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xskater11x
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interfacing wxSockets with data from Java's stream

Post by xskater11x » Sun Jun 04, 2006 9:24 pm

I am making a program that is supposed to read from a stream from a java client, the tihng is, the java client does not send the length of the packet, it just reads until it finds and end_char (linebreak). Both of wxSocketBase's read functions require the size of the buffer, is there anyway to figure this out when the data is actually recieved (perhaps read from startchar to endchar), or does the client have to send the length.

phlox81
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Post by phlox81 » Sun Jun 04, 2006 9:53 pm

Hm, does the client now send or read???

If you get every message without its length,
terminated by the endline, than, I think you
will have to read bytewise, until endline occurs.

xskater11x
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Post by xskater11x » Mon Jun 05, 2006 1:41 am

how would i do that?

the client sends the data in the form

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"packetname" & SEP_CHAR & "data1" & SEP_CHAR & "data2" & SEP_CHAR & END_CHAR
and so on.

basically i want to find the length of the packet before it is put into Read function so i dont have to have a buffer array at MAX_LEN_PACKET and then trim it :roll:

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Post by jb_coder » Mon Jun 05, 2006 2:56 am

You could read it into a wxStringOutputStream or wxMemoryOutputStream.

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Post by jb_coder » Thu Jun 08, 2006 10:03 am

To use an output stream, you would need to wrap wxSocketBase in a wxSocketInputStream though.

So the code might look something like:

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wxSocketInputStream in(socketBase);

wxMemoryOutputStream out;
in.Read(out);

size_t dataSize = out.Stream().GetSize();
void* data = out.GetOutputStreamBuffer().GetBufferStart();
I haven't tried this code to verify that it will work, but it seems like it should if wxInputStream::Read() exits when the Java client stops sending data.

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