[jira] [Created] (GUACAMOLE-1522) Printing is slow for some PDF document

["Jimmy (Jira)" <ji...@apache.org>]

Jimmy created GUACAMOLE-1522:
--------------------------------

             Summary: Printing is slow for some PDF document
                 Key: GUACAMOLE-1522
                 URL: https://issues.apache.org/jira/browse/GUACAMOLE-1522
             Project: Guacamole
          Issue Type: Bug
          Components: guacamole, guacd
    Affects Versions: 1.4.0
         Environment: ubuntu 18.04, GhostScript 9.26 (2018-11-20), Windows Server 2019
            Reporter: Jimmy
             Fix For: 1.5.0, 1.4.0
         Attachments: Print-Sample.pdf, print-001.ps, print-002-1.ps, print-003-1.ps

I attached a PDF document. (Print-Sample.pdf)

This document has 5 pages.

When printing the PDF file on the Apache guacamole, it took more than 30 seconds until the downloading is started.

Once the downloading is started, it's completed in a short time.

As a result of my analysis, the call of `read()` function takes a long time in the `
guac_rdp_print_job_output_thread()` function. (src/protocols/rdp/print-job.c)
 
I captured the print data in the `guac_rdp_print_job_write()` function and saved them to the files. I attached some of the print data. (print-001.ps, print-002.ps, print-003.ps)
When I use Ghostscript to convert them to PDF documents, Ghostscript works quickly.
```
gs -q -dNOPAUSE -dBATCH -dSAFER -dPARANOIDSAFER -sDEVICE=pdfwrite -sOutputFile=print-001.pdf -c .setpdfwrite -f print-001.ps
cat print-001.ps print-002.ps > print-002-full.ps
gs -q -dNOPAUSE -dBATCH -dSAFER -dPARANOIDSAFER -sDEVICE=pdfwrite -sOutputFile=print-002.pdf -c .setpdfwrite -f print-002-full.ps
cat print-002-full.ps print-003.ps > print-003-full.ps
gs -q -dNOPAUSE -dBATCH -dSAFER -dPARANOIDSAFER -sDEVICE=pdfwrite -sOutputFile=print-003.pdf -c .setpdfwrite -f print-003-full.ps
```
 
I hope the Apache Guacamole developer team solves this issue.
Thanks.



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