Cache Primer for Sharepoint with ADFSv3
The first time a browser hits a sharepoint site after a restart, the caches are empty, so the page can take a while to load. One can script something to silently hit a sharepoint web-frontend, causing it to build caches and preventing any real people from experiencing that.
This tool does this for a specific circumstance where it’s kind of hard to script it without better tools - where normal NTML authentication doesn’t work, because there is ADFSv3 authentication configured, and where there may be a number of web-frontends behind a load balancer.
I don’t know why this is required. I’m not a sharepoint admin. Maybe it’s an artifact of a particular setup.
This may work in Python 2, but many distributions of Python 2 do not include urllib that has SNI support. Since this is a sysadmin tool, you probably want it to “just work”, so “just use Python 3.4”.
- Simple install:
pip install sharepointcacheprimer
The pypi package installs an executable in the standard python location, called ‘sharepointcacheprimer’.
usage: sharepointcacheprimer [-h] config site [site …] example: sharepointcacheprimer myconfig.ini mysite.com mysite2.com
This will connect to a sharepoint site, authenticate and load a page silently. It is suited to running as a cronjob/scheduled task.
The configuration file is formatted as a .ini. The packages ships with an example file that is installed in PYTHONROOT/doc/, and described below.
>From the included doc/example.ini
Each section is either a site definition or a cookieset definition.
### A Site Definition This is a sharepoint site, with ADFS credentials and an optional reference to a cookieset to use.
[example.com] ; Site: example.com username = domainuser1 ; ADFS username password = password1 ; ADFS password url = http://example.com ; URL that for site to prime cookielist = examplecookies ; Optional sectionname for Cookie Sets
### A Cookieset Definition Every line is a cookie, as “COOKIENAME = value1,value2,value3”. For each value of each cookie, the site will be primed once. This allows a site pool that uses a cookie-based load balancer to force iterating through every web frontend via cookies.
In the below example, the cookie “LB-COOKIE” will be set for each of three attempts, using the values abc1, abc2, and abc3 respectively. If more than one list of cookies is below, that will just be an additional iteration. For example, another line with 2 more values would cause a total of 5 priming attempts with 5 unique cookie values.
[examplecookies] ; The label referenced above LB-COOKIE = abc1,abc2,abc3 ; A cookie list, comma-delimited
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