"browser" | "crawler" = "brozzler"

Brozzler is a distributed web crawler (爬虫) that uses a real browser (chrome or chromium) to fetch pages and embedded urls and to extract links. It also uses youtube-dl to enhance media capture capabilities.

Brozzler is designed to work in conjunction with warcprox for web archiving.

• Python 3.4 or later
• RethinkDB deployment
• Chromium or Google Chrome browser

Worth noting is that the browser requires a graphical environment to run. You already have this on your laptop, but on a server it will probably require deploying some additional infrastructure (typically X11). The vagrant configuration in the brozzler repository (still a work in progress) has an example setup.

The easiest way to get started with brozzler for web archiving is with brozzler-easy. Brozzler-easy runs brozzler-worker, warcprox, pywb, and brozzler-webconsole, configured to work with each other, in a single process.

Mac instructions:

# install and start rethinkdb
brew install rethinkdb
rethinkdb &>>rethinkdb.log &

# install brozzler with special dependencies pywb and warcprox
pip install brozzler[easy]  # in a virtualenv if desired

# queue a site to crawl
brozzler-new-site http://example.com/

# or a job
brozzler-new-job job1.yml

# start brozzler-easy
brozzler-easy

At this point brozzler-easy will start brozzling your site. Results will be immediately available for playback in pywb at http://localhost:8091/brozzler/.

Brozzler-easy demonstrates the full brozzler archival crawling workflow, but does not take advantage of brozzler's distributed nature.

To install brozzler only:

pip install brozzler  # in a virtualenv if desired

Launch one or more workers:

brozzler-worker

Submit jobs:

brozzler-new-job myjob.yaml

Submit sites not tied to a job:

brozzler-new-site --proxy=localhost:8000 --enable-warcprox-features \
    --time-limit=600 http://example.com/

Jobs are defined using yaml files. Options may be specified either at the top-level or on individual seeds. A job id and at least one seed url must be specified, everything else is optional.

id: myjob
time_limit: 60 # seconds
proxy: 127.0.0.1:8000 # point at warcprox for archiving
ignore_robots: false
enable_warcprox_features: false
warcprox_meta: null
metadata: {}
seeds:
  - url: http://one.example.org/
  - url: http://two.example.org/
    time_limit: 30
  - url: http://three.example.org/
    time_limit: 10
    ignore_robots: true
    scope:
      surt: http://(org,example,

Brozzler comes with a rudimentary web application for viewing crawl job status. To install the brozzler with dependencies required to run this app, run

pip install brozzler[webconsole]

To start the app, run

brozzler-webconsole

See brozzler-webconsole --help for configuration options.

Copyright 2015-2016 Internet Archive

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this software except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.