README.md

Device Detector

The library for parsing User Agent and browser, operating system, device used (desktop, tablet, mobile, tv, cars, console, etc.), vendor and model detection.

• Support latest Crystal version and update script for private use or immediately updates.
• Currently it is production version and works fine more that 2 years.
• The Library uses regexes from matomo-org/device-detector.

Installation

Add this to your application's shard.yml:

dependencies:
  device_detector:
    github: creadone/device_detector

Then run shards install

Usage

require "device_detector"

user_agent = "Mozilla/5.0 (Windows NT 6.4; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/36.0.1985.143 Safari/537.36 Edge/12.0"
response = DeviceDetector::Detector.new(user_agent).call  # All parsers
response = DeviceDetector::Detector.new(user_agent).lite  # Only for bot and mobile

# Check if browser detected
response.browser? #=> true

# browser name
response.browser_name #=> Microsoft Edge

# browser version
response.browser_version #=> 12.0

# get raw response with
pp response.raw

[{
    "bot" => {
      "name" => ""
    }
  },
  {
    "browser" => {
      "name" => "", "version" => ""
    }
  },

  {...},

  {
    "vendorfragment" => {
      "vendor" => ""
    }
  }
]

Available methods:

bot? bot_name	browser_engine? browser_engine_name	browser? browser_name browser_version	camera? camera_vendor camera_model
car_browser? car_browser_vendor car_browser_model	console? console_vendor console_model	feed_reader? feed_reader_name feed_reader_version	library? library_name library_version
mediaplayer? mediaplayer_name mediaplayer_version	mobile_app? mobile_app_name mobile_app_version	mobile_device? mobile_device_vendor mobile_device_type mobile_device_model	os? os_name os_version
pim? pim_name pim_version	portable_media_player? portable_media_player_vendor portable_media_player_model	tv? tv_vendor tv_model	vendorfragment? vendorfragment_vendor

Benchmarks

Recent benchmarking of parsing 1000 user-agent strings on a MacBook Air with Intel Core i5 dual core (0.8 Ghz per core):

Crystal 0.30.1 (2019-08-13) LLVM: 8.0.1 Default target: x86_64-apple-macosx

bench/raw_response.cr --release
            user     system      total        real
full:   5.880000   0.060000   5.940000 (  5.940340)
lite:   3.880000   0.040000   3.920000 (  3.953958)

It's mean that device_detector can work with 1000 / 5.9 ~ 169 QPS.

Testing

crystal spec

Update regexes

crystal scripts/update_regexes.cr

ToDo

• Support overloading of base rules
• CLI & HTTP version
• More lighter and faster the lite version
• Reload regexes on the fly (may be)

Contributing

1. Fork it ( https://github.com/creadone/device_detector/fork )
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create a new Pull Request

Contributors

• @creadone Sergey Fedorov - creator, maintainer
• @delef Ivan Palamarchuk - new api, code optimization
• @zaycker Yuriy Zaitsev - fix check order