Wikigraph

Tool for parsing Wikipedia articles graph.

It takes the provided initial wikipedia links, parses them, gets the child links and adds them to parsing queue. It also saves parsed article name.

Your can export collected links as a CSV table (see usage) to be used in external software. For example you can directly import that file to Cosmograph to visualize the graph:

Install

go install github.com/tymbaca/wikigraph@latest

Usage

Parse

Launch parse process by doing this:

wikigraph parse my_graph.db https://en.wikipedia.org/wiki/Kingdom_of_Greece

Or:

wikigraph parse my_graph.db https://en.wikipedia.org/wiki/Kingdom_of_Greece https://en.wikipedia.org/wiki/Christmas

Program will begin parsing the wikipedia, starting from provided URLs. You can exit the program at any moment by pressing <Ctrl-c> (see graceful shutdown).

Your can continue by launching program with already existing database file:

wikigraph parse my_graph.db

It will continue parsing as expected (without loosing the progress). Also it will retry all links that it failed to parse in previous attempt.

Export

Now you can export the graph to CSV file:

wikigraph export my_graph.db my_graph.csv

Notice that you can run this at any time. You don't need to parse all articles in Wikipedia :)

The exported graph will look something like this:

from,to
"Heil unserm König, Heil!",Kingdom of Greece
"Heil unserm König, Heil!",Hymn to Liberty
"Heil unserm König, Heil!",Greece
Constitutional monarchy,Absolute monarchy
Constitutional monarchy,State religion
Constitutional monarchy,Unitary state
...

Help

Run wikigraph help for more info.

Good thingies

Worker Pool. Program uses a pool of workers parallelize parsing workload.

Job Queueing. Every fetched child link is pushed to the job queue with PENDING status, so later on another worker can grab it, parse it and produce more child articles. Job queue is basically an article table in SQLite DB, you can explore it with any suitable DB client. If program exits, you still have all the queue in database, so you can restart easely.

Graceful Shutdown. Any time while program is executing you can press <Crlt-c>. Program will wait until all workers will parse and save their results and only then exits.

Rate Limiter. Program uses internal http client with rate limiting by default set to 20 RPS (it's hardcoded). I found this rate most optimal. If you get 429 Too Many Requests then just wait a bit and try again. Or you can can change the rate (in cmd/wikigraph/main.go) in code and recompile the program. I'm too lazy to add RPS flag (just look at how I handle cli arguments in main.go lol).

Language support

Program was tested with English, Russian and Wolof Wikipedia. So any other non-ascii language articles can be supported, as long as they match similar HTML layout.

TODO

• Use official MediaWiki API instead of parsing the whole HTML of every article.