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From "Michael Jumper (JIRA)" <>
Subject [jira] [Created] (GUACAMOLE-49) Handle printing synchronously
Date Thu, 09 Jun 2016 21:09:21 GMT
Michael Jumper created GUACAMOLE-49:

             Summary: Handle printing synchronously
                 Key: GUACAMOLE-49
             Project: Guacamole
          Issue Type: Sub-task
          Components: RDP
            Reporter: Michael Jumper
            Assignee: Michael Jumper

As mentioned in GUACAMOLE-44:

Download via SFTP or RDPDR is working perfectly with the new changes. Printing, however, is
not. The RDP printing code begins streaming immediately, not waiting for an "ack" from the

This means the GET request to the stream endpoint will likely occur *after* data has already
been sent, resulting in data being dropped. If the GET request occurs after the stream has
closed, then it will block until some other stream with that index is opened, leading to mismatches
in the downloaded results.

The print process within the RDP connection needs to be modified to wait for the initial "ack",
or blobs may end up being dropped.

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