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<https://stackoverflow.com/questions/52081522/running-pyvirtualdisplay-on-wsgi#>
I am trying to run pyvirtualdisplay as part of a WSGI app. I have Xfvb
installed, my 000-default.conf file:
<VirtualHost *:80>
# The ServerName directive sets the request scheme, hostname and port that
# the server uses to identify itself. This is used when creating
# redirection URLs. In the context of virtual hosts, the ServerName
# specifies what hostname must appear in the request's Host: header to
# match this virtual host. For the default virtual host (this file) this
# value is not decisive as it is used as a last resort host regardless.
# However, you must set it for any further virtual host explicitly.
#ServerName www.example.com
ServerAdmin webmaster@localhost
DocumentRoot /var/www/html
WSGIDaemonProcess flaskapp user=ubuntu threads=5
WSGIScriptAlias / /var/www/html/flaskapp/flaskapp.wsgi
<Directory flaskapp>
WSGIProcessGroup flaskapp
WSGIApplicationGroup %{GLOBAL}
Require all granted
</Directory>
# Available loglevels: trace8, ..., trace1, debug, info, notice, warn,
# error, crit, alert, emerg.
# It is also possible to configure the loglevel for particular
# modules, e.g.
#LogLevel info ssl:warn
ErrorLog ${APACHE_LOG_DIR}/error.log
CustomLog ${APACHE_LOG_DIR}/access.log combined
# For most configuration files from conf-available/, which are
# enabled or disabled at a global level, it is possible to
# include a line for only one particular virtual host. For example the
# following line enables the CGI configuration for this host only
# after it has been globally disabled with "a2disconf".
#Include conf-available/serve-cgi-bin.conf</VirtualHost>
# vim: syntax=apache ts=4 sw=4 sts=4 sr noet
my code :
from flask import Flaskfrom pyvirtualdisplay import Display
app = Flask(__name__)
@app.route('/')def crawl_sc():
display = Display(visible=0, size=(1920, 999))
display.start()
display.stop()
return 'ran'if __name__ == '__main__':
app.run(debug=True)
when I run this through the WSGI it just continually loads, but there are
no errors in the error.log. I am using an AWS EC2 with Ubuntu 16.04 and
Apache 2.4.18, mod_wsgi 4.6.4 & Python 3.6. I understand that
pyvirtualdisplay runs a popen for Xvfb (above command generates: Xvfb -br
-nolisten tcp -screen 0 1920x999x24 :1037 as command prompt) but this needs
to work with selenium for this app to perform webscraping and when i run
that command in a standalone app selenium does not function, yet using
pyvirtualdisplay makes it work.
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