Extension:Graph/Graphoid
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Graphoid service
 Warning: | WMF is no longer maintaining Graphoid. Graphoid was undeployed from Wikimedia wikis. |
Graphoid (git:mediawiki/services/graphoid) is a node.js service that converts a graph definition into a static PNG image using the same Vega library code that runs in advanced browsers. The reason Graphoid was initially developed was to provide a static image so we wouldn't have to bundle Vega and d3 resource loader modules with every page response. See phab:T211881 for more details. The service is available on the Wikimedia cluster at https://www.mediawiki.org/api/rest_v1/#/Page%20content/get_page_graph_png__title___revision___graph_id_.
You can install it yourself:
$ sudo apt-get install libcairo2-dev libjpeg8-dev libpango1.0-dev libgif-dev build-essential g++
$ git clone https://gerrit.wikimedia.org/r/mediawiki/services/graphoid
$ cd graphoid
$ npm install
$ npm start
(note: this package is not being maintained (phab:T211881, and installation may fail, see phab:T196001 , phab:T239100. npm i --build-from-source may help.)
The service URLs contain the domain of the page (for example mediawiki.org), service version (v1), the title of the page with the graph (PageTitle), revision ID of the page (12345, but could be 0 for current), and a hash ID of the graph itself (also used in HTML page to identify graph definition), for example:
http://localhost:6927/mediawiki.org/v1/PageTitle/12345/a64b022a8fa5b7fc5e40a2c95cd0a114b2ae1174.png (deprecated url)
You configure the Graph extension to use the Graphoid service in LocalSettings.php with a line like
$wgGraphImgServiceUrl = "//localhost:6927/%1\$s/v1/%2\$s/%3\$s/%4\$s.png"; //deprecated path, older versions only
$wgGraphImgServiceUrl = "//graphoid.wikimedia.org/%1\$s/v1/png/%2\$s/%3\$s/%4\$s.png"; //deprecated path, older versions only
Configure graphoid services
You can further configure the service via its config file.