How can I find out the IAB category for an IP address using Erlang?

To determine the IAB category for an IP address using IP2Location.io in Erlang, you can use the IP2Location.io API to retrieve geolocation and related data. For more info, please see the IAB categories.

  1. We'll assume that you have already installed Erlang and we won't cover that here. You will also need a paid subscription to the Security plan. Subscribe now!
  2. Our example is for the Debian operating system. So, we'll be installing the erlang-jiffy Debian package for parsing the JSON results. For other platforms, please refer to the Jiffy GitHub.
  3. In the command line, run the command below to install the erlang-jiffy package if you don't have it installed.
    Bash 
    
sudo apt install erlang-jiffy
  4. Save the below code into a file called test.erl on your computer.
    Erlang 
    
-module(test).
-export([runtest/0]).

runtest() ->
	Key = "YOUR_API_KEY",
	IP = "8.8.8.8",

	ssl:start(),
	inets:start(),
	
	MyParams = uri_string:compose_query([{"format", "json"}, {"key", Key}, {"ip", IP}]),
	case httpc:request(get, {"https://api.ip2location.io/?" ++ MyParams, []}, [{ssl, [{versions, ['tlsv1.2']}]}, {autoredirect, false}], []) of
		{ok, {{_, 200, _}, _, Body}} ->
			Result = jiffy:decode(unicode:characters_to_binary(Body,unicode,utf8),[return_maps]),
			case maps:is_key(<<"ads_category">>, Result) of
				true ->
					IAB = maps:get(<<"ads_category">>, Result),
					io:format("The IAB category for IP ~s is ~s.~n", [IP, IAB]);
				_ ->
					io:format("ERROR: The IAB category field requires a paid subscription to the Security plan.~n", [])
			end;
		{ok, {{_, 400, _}, _, Body}} ->
			Result = jiffy:decode(unicode:characters_to_binary(Body,unicode,utf8),[return_maps]),
			case maps:is_key(<<"error">>, Result) of
				true ->
					Error = maps:get(<<"error">>, Result),
					io:format("ERROR: ~s~n", [maps:get(<<"error_message">>, Error)]);
				_ ->
					io:format("ERROR: ~p~n", [Result])
			end;
		{ok, {{_, 401, _}, _, Body}} ->
			Result = jiffy:decode(unicode:characters_to_binary(Body,unicode,utf8),[return_maps]),
			case maps:is_key(<<"error">>, Result) of
				true ->
					Error = maps:get(<<"error">>, Result),
					io:format("ERROR: ~s~n", [maps:get(<<"error_message">>, Error)]);
				_ ->
					io:format("ERROR: ~p~n", [Result])
			end;
		{error, Reason} ->
			io:format("ERROR ~p~n", [Reason])
	end.
  5. In the command line, run the below command to launch the Erlang shell.
    Bash 
    
erl
  6. Inside the Erlang shell, run the below commands to compile and run the test code.
    Erlang 
    
c(test).
test:runtest().

This script will output the IAB category of specified IP address. Make sure to replace 8.8.8.8 with the IP address you want and replace YOUR_API_KEY to your own API key.

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