UAParser

A simple, fast user-agent parsing library based on BrowserScope's UA database with a good default dictionary.

Installation

Add :ua_parser to your mix.exs dependencies:

def deps do
  [
    {:ua_parser, "~> 1.8"}
  ]
end

Usage

iex> ua = UAParser.parse("Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_5_7; en-us) AppleWebKit/530.17 (KHTML, like Gecko) Version/4.0 Safari/530.17 Skyfire/2.0")
%UAParser.UA{
  device: %UAParser.Device{family: nil},
  family: "Skyfire",
  os: %UAParser.OperatingSystem{
    family: "Mac OS X",
    version: %UAParser.Version{major: "10", minor: "5", patch: "7", patch_minor: nil}
  },
  version: %UAParser.Version{major: "2", minor: "0", patch: nil, patch_minor: nil}
}
iex> to_string(ua)
"Skyfire 2.0"
iex> to_string(ua.os)
"Mac OS X 10.5.7"
iex> to_string(ua.device)
"Other"

Retrieving and parsing a user-agent string from Plug:

ua =
  conn
  |> Plug.Conn.get_req_header("user-agent")
  |> List.first()
  |> UAParser.parse()

Example

There is an example Phoenix application with a simple endpoint/route to retrieve the user agent header. To run it, simply cd into the example directory, and run the following:

Phoenix

$ mix do deps.get, compile
$ npm i && brunch build
# change the configuration to match your own postgres username/password
$ mix do ecto.create, ecto.migrate
$ iex -S mix phoenix.server
# visit localhost:4000/user_agent

Plug

It can also be used as a simple plug:

mix new ua_plug
cd ua_plug

And now set up mix.exs:

# ...
defp deps do
  [
   {:cowboy, "~> 1.0.0"},
   {:plug, "~> 1.0"},
   {:ua_parser, git: "https://github.com/beam-community/ua_parser.git",
                branch: "master"},
  ]
end
# ...

And we get our deps and compile:

mix do deps.get, compile

And now we can make our plug:

defmodule UAPlug do
  import Plug.Conn

  def init(options), do: options

  def call(conn, _opts) do
    ua =
      conn
         |> Plug.Conn.get_req_header("user-agent")
         |> List.first()
         |> UAParser.parse()
    send_resp(200, ua)
  end
end

From here we can pipe requests through it in other applications or use it on its own as we please.

Copyright and License

Copyright (c) 2016 Sean Callan

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 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.