Sniffer aims to help:
- Log outgoing HTTP requests. Sniffer logs as JSON format for export to ELK, Logentries and etc.
- Debug requests. Sniffer allows to save all requests/responses in storage for future debugging
Sniffer supports most common HTTP accessing libraries:
Add this line to your application's Gemfile:
gem 'sniffer'And then execute:
$ bundle
Or install it yourself as:
$ gem install sniffer
Sniffer default options:
Sniffer.config do |c|
c.logger = Logger.new($stdout),
c.severity = Logger::Severity::DEBUG,
# HTTP options to log
c.log = {
request_url: true,
request_headers: true,
request_body: true,
request_method: true,
response_status: true,
response_headers: true,
response_body: true,
timing: true
},
c.store = true, # save requests/responses to Sniffer.data
c.enabled = false # Sniffer disabled by default
endHere's some simple examples to get you started:
require 'http'
require 'sniffer'
Sniffer.enable!
HTTP.get('http://example.com/?lang=ruby&author=matz')
Sniffer.data[0].to_h
# => {:request=>
# {:host=>"example.com",
# :query=>"/?lang=ruby&author=matz",
# :port=>80,
# :headers=>{"Accept-Encoding"=>"gzip;q=1.0,deflate;q=0.6,identity;q=0.3", "Connection"=>"close"},
# :body=>"",
# :method=>:get},
# :response=>
# {:status=>200,
# :headers=>
# {"Content-Encoding"=>"gzip",
# "Cache-Control"=>"max-age=604800",
# "Content-Type"=>"text/html",
# "Date"=>"Thu, 26 Oct 2017 13:47:00 GMT",
# "Etag"=>"\"359670651+gzip\"",
# "Expires"=>"Thu, 02 Nov 2017 13:47:00 GMT",
# "Last-Modified"=>"Fri, 09 Aug 2013 23:54:35 GMT",
# "Server"=>"ECS (lga/1372)",
# "Vary"=>"Accept-Encoding",
# "X-Cache"=>"HIT",
# "Content-Length"=>"606",
# "Connection"=>"close"},
# :body=> "OK",
# :timing=>0.23753299983218312}}You can clear saved data
Sniffer.clear!
You can configure capacity of storage to prevent the huge memory usage and set up log rotation. By default log rotation is active (when capacity is set) and log works like a queue. If rotation is disabled - requests will be logged until result log size reaches the capacity.
# will fill the storage and stop logging
Sniffer.config.store = {capacity: 1000, rotate: false}
# will rotate logs to fit 1000 results (rotate is true by default)
Sniffer.config.store = {capacity: 1000}
You can reset config to default
Sniffer.reset!
You can enable and disable Sniffer
Sniffer.enable!
Sniffer.disable!
By default output log looks like that:
D, [2017-10-26T16:47:14.007152 #59511] DEBUG -- : {"port":80,"host":"example.com","query":"/?lang=ruby&author=matz","rq_connection":"close","method":"get","request_body":"","status":200,"rs_accept_ranges":"bytes","rs_cache_control":"max-age=604800","rs_content_type":"text/html","rs_date":"Thu, 26 Oct 2017 13:47:13 GMT","rs_etag":"\"359670651+gzip\"","rs_expires":"Thu, 02 Nov 2017 13:47:13 GMT","rs_last_modified":"Fri, 09 Aug 2013 23:54:35 GMT","rs_server":"ECS (lga/1385)","rs_vary":"Accept-Encoding","rs_x_cache":"HIT","rs_content_length":"1270","rs_connection":"close","timing":0.513012999901548,"response_body":"OK"}
where rq_xxx is request header and rs_xxx - response header
After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.
To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.
Bug reports and pull requests are welcome on GitHub at https://github.com/aderyabin/sniffer. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.
The gem is available as open source under the terms of the MIT License.
Everyone interacting in the Sniffer project’s codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.