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https://issues.apache.org/jira/browse/GUACAMOLE-1214?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17234753#comment-17234753
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Nick Couchman commented on GUACAMOLE-1214:
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So, as Mike mentioned, this is not a bug - the JavaScript "onack" will be
called when an "ack" instruction is sent.
If you're trying to get Clipboard image support working, and using BlobWriter,
you will need to modify the guacd side of things to send the "ack" instruction.
> When sending data more than 6048 bytes, the readNextChunk() function is
> called only once in BlobWriter.sendBlob()
> -----------------------------------------------------------------------------------------------------------------
>
> Key: GUACAMOLE-1214
> URL: https://issues.apache.org/jira/browse/GUACAMOLE-1214
> Project: Guacamole
> Issue Type: Bug
> Components: guacamole-client
> Affects Versions: 1.2.0
> Reporter: Jimmy
> Priority: Major
> Attachments: image-2020-11-17-09-25-16-947.png,
> image-2020-11-17-09-27-14-470.png
>
>
> Because I need to investigate the solution of the copy/paste of an image, I
> modified some code related to the clipboard.
> When I click the guacamole client page after copy the image, the
> ManagedClient.setClipboard() function is called to send the blob of the image
> to the guacamole server.
> !image-2020-11-17-09-25-16-947.png!
> When the size of data to be sent is more than 6048 bytes, the readNextChunk()
> function is called only once in BlobWriter.sendBlob().
> Because arrayBufferWriter.onack() isn't called.
> !image-2020-11-17-09-27-14-470.png!
> So, only the 6048 bytes are sent in the whole data.
>
> I think that to directly call readNextChunk() after call of
> arrayBufferWriter.sendData() in chunkLoadComplete() of BlockWriter.js may be
> a solution.
>
> Please help.
> Thanks.
>
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