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Ruby client for the BrowserMob and BrowserUp Proxy.
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Ruby client for the BrowserMob Proxy 2.0 REST API.

NOTE: The BrowserMob Proxy is no longer actively maintained and has had no releases since 2016.

A BrowserMob Proxy alternative is now available in the BrowserUp Proxy. The BrowserUp Proxy is an actively maintained fork of the BrowserMob proxy. It has added HTTP/2, Java 11, Brotli compression support, and more. It is an API compatible drop-in replacement, so using it is just a matter of using the BrowserUp proxy binary instead.

The only compatibility exception is the deprecated legacy API.

This release of browsermob-proxy-rb should work with the binary for either the BrowserUp Proxy, or the BrowserMob Proxy.

How to use with selenium-webdriver


require 'selenium/webdriver'
require 'browsermob/proxy'

server ="/path/to/downloads/browsermob-proxy/bin/browsermob-proxy") #=> #<BrowserMob::Proxy::Server:0x000001022c6ea8 ...>

proxy = server.create_proxy #=> #<BrowserMob::Proxy::Client:0x0000010224bdc0 ...>

profile = #=> #<Selenium::WebDriver::Firefox::Profile:0x000001022bf748 ...>
profile.proxy = proxy.selenium_proxy

driver = Selenium::WebDriver.for :firefox, :profile => profile

proxy.new_har "google"
driver.get ""

har = proxy.har #=> #<HAR::Archive:0x-27066c42d7e75fa6>
har.entries.first.request.url #=> ""
har.save_to "/tmp/google.har"


With event listener:

require 'selenium/webdriver'
require 'browsermob/proxy'
require 'browsermob/proxy/webdriver_listener'

# start server, set up proxy like above
proxy_listener =

driver = Selenium::WebDriver.for :firefox, :profile => profile, :listener => proxy_listener
# use driver

proxy_listener.hars #=> [#<HAR::Archive:0x-27066c42d7e75fa6>, #<HAR::Archive:0x-d7e75fa627066c42>]

Viewing HARs

The HAR gem includes a HAR viewer. After running the code above, you can view the saved HAR by running

$ har /tmp/google.har

See also

Note on Patches/Pull Requests

  • Fork the project.
  • Make your feature addition or bug fix.
  • Add tests for it. This is important so I don't break it in a future version unintentionally.
  • Commit, do not mess with rakefile, version, or history. (if you want to have your own version, that is fine but bump version in a commit by itself I can ignore when I pull)
  • Send me a pull request. Bonus points for topic branches.


Copyright 2011-2019 Jari Bakken

Copyright 2019 Eric Beland

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

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.

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