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copied!<p>It is probably a bug in DataSnap. I have exactly the same problem and here is the QC report. <a href="http://qc.embarcadero.com/wc/qcmain.aspx?d=91180" rel="nofollow">http://qc.embarcadero.com/wc/qcmain.aspx?d=91180</a></p> <p>Vote on QC report to be fixed and wait for an update of Delphi-XE.</p> <p><strong>Edit 1</strong> A crazy idea, don't specify filters on the client.</p> <p>Here is a paper from Pawel Glowacki on Transport Filters. <a href="http://edn.embarcadero.com/article/41293" rel="nofollow">http://edn.embarcadero.com/article/41293</a> He specifically mentions that you <strong>should</strong> add ZLibCompression to the Filters property of the DataSnap driver on the client.</p> <p>I have tested not to do so and it works just fine. You do have to add DBXCompressionFilter to the uses clause otherwise you get "ZLibCompression is not registered" error. </p> <p>With PC1 and ZLibCompression on the server and no filter on the client everything seams to work as expected. I have checked the traffic and it is encrypted and compressed.</p> <p>Until someone from Embarcadero confirms that this is the way it should be I would think twice before I used it.</p> <p><strong>Edit 2</strong> Here is a post on Embarcadero Discussion Forums by Bob Swart saying that it is <strong>enough</strong> to add the filters on the server. Not Embarcadero directly but pretty close :) <a href="https://forums.embarcadero.com/thread.jspa?threadID=48875&tstart=0" rel="nofollow">https://forums.embarcadero.com/thread.jspa?threadID=48875&tstart=0</a></p>

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