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[REBOL] Re: retrieving data from TCP port

From: gscottjones:mchsi at: 21-Oct-2002 17:43

From: Francois Prowse
> Just wondering if anyone can help me with the following...I'm sending some > xml statements directly to a known TCP port as follows...
.. Hi, Francois, Assuming I understand the problem correctly, with just a minor change, you may be able to simplify things considerably. Here is the quickest version that *may* do the job: ;open a port named port port: open tcp://x.x.x.x:3221 ;let the word initial contain the sample xml initial: read %initial.xml ;cram the xml into the port ;**note that a return value is _not _ ; checked from this statement insert port initial ;assuming server is very fast, simply read the return ; (it is usually hazardous to assume anything, though) result: copy port ;close the port close port ;check returned result for a unique fragment ; suggesting success or failure either find result "</rpc-reply>" [ print "success!!" ][ print "ooh, got an error..." ] If the port times out, or you get mysterious errors, or you want safer code, then you may need to approach the problem differently, possibly use an asynchronous mode (the no-wait option) and continue polling until you receive a none (similar to what you were doing in your code). I would have to experiment to with a live example to get it to work right, but it would be something like: port: open tcp://x.x.x.x:3221 initial: read %initial.xml insert port initial result: copy "" portion: copy "" while [portion: copy port] [append result portion] close port either find result "</rpc-reply>" [ print "success!!" ][ print "ooh, got an error..." ] I *hope* that helps. It helps to have a working server to try the code against (I'm not good enough to see all the silly errors I may do on first coding :-). --Scott Jones