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Modifying WebViewer Serverkeyboard_arrow_down

Modifying WebViewer Server

It's possible to perform internal changes to WebViewer Server, though we do not recommend it. You may wish to do this if our options do not expose a particular configuration setting, such as the maximum allowed threads in Tomcat. You can do so by calling our Docker image and performing actions on top of it inside of a Dockerfile, then building and running this Dockerfile.

FROM pdftron/webviewer-server:latest
COPY myfile.txt /
...

docker build -t webviewer .

docker run webviewer

The important paths within the server image are as follows:

/usr/local/apache-tomcat: This is the server which hosts the WebViewer Server code, it is where the bulk of work occurs.

/usr/local/apache-tomcat/conf: This is the main configuration directory for tomcat, within you'll find 3 configuration files - server.xml, web.xml and context.xml. You may change this but do so at your own risk as we have configured these files specifically for WebViewer Server.

/usr/local/apache-tomcat/static_data: This is where we store WebViewer Server's cache.

/usr/local/apache-tomcat/internal_data/: Where temporary data is stored, mainly used by PDFTron core for memory swaps.

When WebViewer Server starts, it executes a script located in /usr/local/apache-tomcat/bin/watchdog.sh, this file is responsible for keeping Tomcat running inside of the container.

For more information on configuring Tomcat, you can refer to their available guide for Tomcat 9 http://tomcat.apache.org/tomcat-9.0-doc/

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