cups "Print file was not accepted" when using QPrinter
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Hi,
We are running cups 1.5.3 on Ubuntu 12.04. When using QPrinter to print an image file, the cups shows the error "Print file was not accepted" in the error_log. The sample code is very simple as below:
QPrinter printer; printer.setPrinterName("HP"); QImage image("/usr/local/test/test.bmp"); QPainter painter; painter.begin(&printer); painter.drawImage(0, 0, image); painter.end();The Qt documentation says QPrinter sends PDF to the printer in X11 cups system. However in the error_log, we saw the cups received "application/octet-stream" in the print job. It is different to the documentation.
We try to use "lpr test.pdf" to print a PDF file and it's no problem. It is obvious that the cups is able to print a PDF file directly by lpr. So what's the problem when using QPrinter?
Below is a part of error_log:
D [05/Jun/2017:09:28:01 +0800] [Job 14] Getting supported attributes...
D [05/Jun/2017:09:28:01 +0800] [Job 14] Get-Printer-Attributes: successful-ok (successful-ok)
D [05/Jun/2017:09:28:01 +0800] [Job 14] document-format-supported (5 values)
D [05/Jun/2017:09:28:01 +0800] [Job 14] [0] = "text/plain"
D [05/Jun/2017:09:28:01 +0800] [Job 14] [1] = "text/plain; charset=US-ASCII"
D [05/Jun/2017:09:28:01 +0800] [Job 14] [2] = "application/postscript"
D [05/Jun/2017:09:28:01 +0800] [Job 14] [3] = "application/vnd.hp-PCL"
D [05/Jun/2017:09:28:01 +0800] [Job 14] [4] = "application/octet-stream"
D [05/Jun/2017:09:28:01 +0800] [Job 14] Printer supports Create-Job but not Send-Document.
D [05/Jun/2017:09:28:01 +0800] [Job 14] update_reasons(attr=1(none), s="(null)")
D [05/Jun/2017:09:28:01 +0800] [Job 14] STATE: -none
D [05/Jun/2017:09:28:01 +0800] [Job 14] final_content_type="application/octet-stream", document_format="application/octet-stream"
D [05/Jun/2017:09:28:01 +0800] [Job 14] Validate-Job IPP/1.1
D [05/Jun/2017:09:28:01 +0800] [Job 14] printer-uri="ipp://172.16.196.7:631/"
D [05/Jun/2017:09:28:01 +0800] [Job 14] requesting-user-name="root"
D [05/Jun/2017:09:28:01 +0800] [Job 14] job-name="14 - "
D [05/Jun/2017:09:28:01 +0800] [Job 14] document-format="application/octet-stream"
D [05/Jun/2017:09:28:01 +0800] [Job 14] update_reasons(attr=1(none), s="(null)")
D [05/Jun/2017:09:28:01 +0800] [Job 14] Get-Printer-Attributes: successful-ok (successful-ok)
D [05/Jun/2017:09:28:01 +0800] [Job 14] Validate-Job: client-error-bad-request (client-error-bad-request)
D [05/Jun/2017:09:28:01 +0800] [Job 14] Print-Job IPP/1.1
D [05/Jun/2017:09:28:01 +0800] [Job 14] printer-uri="ipp://172.16.196.7:631/"
D [05/Jun/2017:09:28:01 +0800] [Job 14] requesting-user-name="root"
D [05/Jun/2017:09:28:01 +0800] [Job 14] job-name="14 - "
D [05/Jun/2017:09:28:01 +0800] [Job 14] document-format="application/octet-stream"
D [05/Jun/2017:09:28:01 +0800] [Job 14] Sending file using HTTP/1.1 chunking...
D [05/Jun/2017:09:28:01 +0800] [Job 14] Read 16384 bytes...
D [05/Jun/2017:09:28:01 +0800] [Job 14] Read 16384 bytes...
D [05/Jun/2017:09:28:01 +0800] [Job 14] Read 16384 bytes...
D [05/Jun/2017:09:28:01 +0800] [Job 14] Get-Jobs: client-error-bad-request (client-error-bad-request)
D [05/Jun/2017:09:28:01 +0800] [Job 14] Read 16384 bytes...
D [05/Jun/2017:09:28:01 +0800] [Job 14] Read 16384 bytes...
D [05/Jun/2017:09:28:01 +0800] [Job 14] Read 16384 bytes...
D [05/Jun/2017:09:28:01 +0800] [Job 14] Read 16384 bytes...
D [05/Jun/2017:09:28:01 +0800] [Job 14] Read 16384 bytes...
D [05/Jun/2017:09:28:01 +0800] [Job 14] Read 16384 bytes...
D [05/Jun/2017:09:28:01 +0800] [Job 14] Read 16384 bytes...
D [05/Jun/2017:09:28:01 +0800] [Job 14] Read 16384 bytes...
D [05/Jun/2017:09:28:01 +0800] [Job 14] Read 16384 bytes...
D [05/Jun/2017:09:28:02 +0800] [Job 14] Read 6015 bytes...
D [05/Jun/2017:09:28:02 +0800] [Job 14] Print-Job: client-error-bad-request (client-error-bad-request)
E [05/Jun/2017:09:28:02 +0800] [Job 14] Print file was not accepted.Thanks.