Hello Dave
for my point of view , the problem come from file
http://pastebin.com/QGCFtq2X
<http://l.facebook.com/l.php?u=http%3A%2F%2Fpastebin.com%2FQGCFtq2X&h=rAQEet8kg&enc=AZPs41qoqJIPTpi-4sL7ICzxgTszmdLN8joWBwLuzcrfK9vRcRfNFMBkMwQ469-n_nstqwOwtAbH-nmvLQ2wpy562EF9ef2zhBcdAmH-VMVJ0hxvwzRz0I7PTKh3UXO8cLkyOO0FHwL87zQbk5K3hOlh&s=1>
line 77 to 80
while ($process->poll()) {
template 'processing.tt';
sleep 10;
}
first time it's work, but after not , every 10 sec you send
processing.tt to your browser ( first time ,
browser ask 1 anwers, not more , and that all )
you need to use ajax
1) launch in background your process (and create PID to locate your
process, https://metacpan.org/pod/Unix::PID )
2) add javascript in your brower to update result ( see example below )
3) add route
ajax '/myProcesss' {
If ( $PID ) {
... in course
} else {
... process over
}
}
see fun example
http://advent.perldancer.org/2011/14
bye
Hugues
Le 13/10/2014 15:45, Tushar Dave a écrit :
Hello,
I am working on my Dancer Project (using Perl 5.20.0, apache2, RHEL 6
and Dancer) in which I am providing a web form to user. When user
submits the form with appropriate values, a Q-Q plot will be generated
by R code on backend. Once the plot is available on server I am
sending user an email with the link of generated plot.
My code works completely fine with smaller data file (e.g. 100KB – 10
MB) upload. But, if user uploads the large data files (e.g. > 30MB),
the upload works fine but processing of data and generating of plot
will take more time which caused 504 Gateway Time Out Error. I can use
below options to resolve this.
(1) Change Time Out time in apache configuration file
(2) Submit a job through batch queuing system such as SGE
(3) Use Proc::Simple or Proc::Background to run the process in
background and keep checking whether process is running in background
or not.
I am using the 3rd option. What I am trying to do is I am using
Proc::Simple to run Perl-R-code (i.e. listed in below list as 2) in
background. Then I am using poll() method of Proc::Simple to check
whether the process is running or not. If the process is running,
render a template that shows user that process is still running. When
process is finished, render another template with generated Q-Q plot.
Below are my codes:
(1) Dancer code under lib/ ---- http://pastebin.com/QGCFtq2X
<http://l.facebook.com/l.php?u=http%3A%2F%2Fpastebin.com%2FQGCFtq2X&h=rAQEet8kg&enc=AZPs41qoqJIPTpi-4sL7ICzxgTszmdLN8joWBwLuzcrfK9vRcRfNFMBkMwQ469-n_nstqwOwtAbH-nmvLQ2wpy562EF9ef2zhBcdAmH-VMVJ0hxvwzRz0I7PTKh3UXO8cLkyOO0FHwL87zQbk5K3hOlh&s=1>
(2) Perl + R code that generate Q-Q plot ----http://pastebin.com/U5hg45dQ
(3) qqPlot.tt ---- http://pastebin.com/u30XArVr
(4) processing.tt <http://processing.tt> ----
http://pastebin.com/RSH1kptp
<http://l.facebook.com/l.php?u=http%3A%2F%2Fpastebin.com%2FRSH1kptp&h=RAQE1lHBj&enc=AZNQgweLY1hC15HguQHmiCGzFR4PmjOnNATBVnN1R6YQAB5GTbq8HVyUgPioxTRgWi5Ixb2d4HXAkvB9XC8336gnmRWA-ARYheUbQ0LrUZRyaQI_lpMVDD_D9ZL-F-79X6a4ZlLInL6O6QOknwU9RBpX&s=1>
The problem I am facing right now that my Dancer code (i.e. listed as
1 above) execute while loop on line 77 of (1) but the template
“processing.tt <http://processing.tt>” is not coming up on browser. I
don’t know what am I doing wrong?
Can someone help me to figure out my error? Or please suggest me any
other way to resolve Gateway Time Out Error.
Thanks for any help.
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