Zimit

Zimit is a scraper allowing to create ZIM file from any Web site.

Technical background

Zimit runs a fully automated browser-based crawl of a website property and produces a ZIM of the crawled content. Zimit runs in a Docker container.

The system:

• runs a website crawl with Browsertrix Crawler, which produces WARC files
• converts the crawled WARC files to a single ZIM using warc2zim

The zimit.py is the entrypoint for the system.

After the crawl is done, warc2zim is used to write a zim to the /output directory, which can be mounted as a volume.

Using the --keep flag, the crawled WARCs will also be kept in a temp directory inside /output

Usage

zimit is intended to be run in Docker.

To build locally run:

docker build -t ghcr.io/openzim/zimit .

The image accepts the following parameters, as well as any of the warc2zim ones; useful for setting metadata, for instance:

• --url URL - the url to be crawled (required)
• --workers N - number of crawl workers to be run in parallel
• --wait-until - Puppeteer setting for how long to wait for page load. See page.goto waitUntil options. The default is load, but for static sites, --wait-until domcontentloaded may be used to speed up the crawl (to avoid waiting for ads to load for example).
• --name - Name of ZIM file (defaults to the hostname of the URL)
• --output - output directory (defaults to /output)
• --limit U - Limit capture to at most U URLs
• --exclude <regex> - skip URLs that match the regex from crawling. Can be specified multiple times. An example is --exclude="(\?q=|signup-landing\?|\?cid=)", where URLs that contain either ?q= or signup-landing? or ?cid= will be excluded.
• --scroll [N] - if set, will activate a simple auto-scroll behavior on each page to scroll for upto N seconds
• --keep - if set, keep the WARC files in a temp directory inside the output directory

The following is an example usage. The --shm-size flags is needed to run Chrome in Docker.

Example command:

docker run ghcr.io/openzim/zimit zimit --help
docker run ghcr.io/openzim/zimit warc2zim --help
docker run  -v /output:/output \
       --shm-size=1gb ghcr.io/openzim/zimit zimit --url URL --name myzimfile --workers 2 --waitUntil domcontentloaded

The puppeteer-cluster provides monitoring output which is enabled by default and prints the crawl status to the Docker log.

Note: Image automatically filters out a large number of ads by using the 3 blocklists from anudeepND. If you don't want this filtering, disable the image's entrypoint in your container (docker run --entrypoint="" ghcr.io/openzim/zimit ...).

Nota bene

While Zimit 1.x relied on a Service Worker to display the ZIM content, this is not anymore the case since Zimit 2.x which does not have any special requirements anymore.

It should also be noted that a first version of a generic HTTP scraper was created in 2016 during the Wikimania Esino Lario Hackathon.

That version is now considered outdated and archived in 2016 branch.

License

GPLv3 or later, see LICENSE for more details.