sniffer

by aderyabin

aderyabin / sniffer

Log and Analyze Outgoing HTTP Requests

459 Stars 25 Forks Last release: 8 months ago (v0.4.0) MIT License 121 Commits 4 Releases

Available items

No Items, yet!

The developer of this repository has not created any items for sale yet. Need a bug fixed? Help with integration? A different license? Create a request here:

Sniffer

Build Gem Version Join the chat at https://gitter.im/aderyabin/sniffer

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:

Demo

demo

Installation

Add this line to your application's Gemfile:

gem 'sniffer'

And then execute:

$ bundle

Or install it yourself as:

$ gem install sniffer

Usage

Here'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

Configuration

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
  c.url_whitelist = nil
  c.url_blacklist = nil
end

Whitelist

You can add specific host url to whitelist as regexp or string. Sniffer will store only requests that matched.

Sniffer.config.url_whitelist = /whitelisted.com/

HTTP.get('http://example.com') Sniffer.data[0].to_h

=> {}

HTTP.get('http://whitelisted.com/') Sniffer.data[0].to_h

=> {{:request=>{:host=>"whitelisted.com", ....}}

Blacklist

You can add specific host url to blacklist as regexp or string. Sniffer will ignore all matched requests.

Sniffer.config.url_blacklist = /blacklisted.com/

HTTP.get('http://blacklisted.com') Sniffer.data[0].to_h

=> {}

HTTP.get('http://example.com') Sniffer.data[0].to_h

=> {{:request=>{:host=>"example.com", ...}}

Middleware

You can add the middleware to run custom code before/after the sniffed data was logged.

Sniffer.middleware do |chain|
  chain.add MyHook
end

class MyHook def request(data_item) puts "Before work" yield puts "After work" end

def response(data_item) puts "Before work" yield puts "After work" end end

Development

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.

Contributing

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.

Acknowledge

License

The gem is available as open source under the terms of the MIT License.

Code of Conduct

Everyone interacting in the Sniffer project’s codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.

We use cookies. If you continue to browse the site, you agree to the use of cookies. For more information on our use of cookies please see our Privacy Policy.