Added specific exceptions for the different types of errors.

src/GeoIp2/Exception/AuthenticationException.php

@@ -0,0 +1,10 @@
+<?php
+
+namespace GeoIp2\Exception;
+
+/**
+ * This class represents a generic error.
+ */
+class AuthenticationException extends GeoIp2Exception
+{
+}

src/GeoIp2/Exception/InvalidRequestException.php

@@ -6,7 +6,7 @@ namespace GeoIp2\Exception;
  * This class represents an error returned by MaxMind's GeoIP2
  * web service.
  */
-class WebServiceException extends HttpException
+class InvalidRequestException extends HttpException
 {
     /**
      * The code returned by the MaxMind web service

src/GeoIp2/Exception/OutOfQueriesException.php

@@ -0,0 +1,10 @@
+<?php
+
+namespace GeoIp2\Exception;
+
+/**
+ * This class represents a generic error.
+ */
+class OutOfQueriesException extends GeoIp2Exception
+{
+}

src/GeoIp2/WebService/Client.php

@@ -4,7 +4,10 @@ namespace GeoIp2\WebService;
 
 use GeoIp2\Exception\GeoIp2Exception;
 use GeoIp2\Exception\HttpException;
-use GeoIp2\Exception\WebServiceException;
+use GeoIp2\Exception\AddressNotFoundException;
+use GeoIp2\Exception\AuthenticationException;
+use GeoIp2\Exception\InvalidRequestException;
+use GeoIp2\Exception\OutOfQueriesException;
 use GeoIp2\Model\City;
 use GeoIp2\Model\CityIspOrg;
 use GeoIp2\Model\Country;
@@ -273,8 +276,7 @@ class Client
                 $uri
             );
         }
-
-        throw new WebServiceException(
+        $this->handleWebServiceError(
             $body['error'],
             $body['code'],
             $status,
@@ -282,6 +284,28 @@ class Client
         );
     }
 
+    private function handleWebServiceError($message, $code, $status, $uri)
+    {
+        switch ($code) {
+            case 'IP_ADDRESS_NOT_FOUND':
+            case 'IP_ADDRESS_RESERVED':
+                throw new AddressNotFoundException($message);
+            case 'AUTHORIZATION_INVALID':
+            case 'LICENSE_KEY_REQUIRED':
+            case 'USER_ID_REQUIRED':
+                throw new AuthenticationException($message);
+            case 'OUT_OF_QUERIES':
+                throw new OutOfQueriesException($message);
+            default:
+                throw new InvalidRequestException(
+                    $message,
+                    $code,
+                    $status,
+                    $uri
+                );
+        }
+    }
+
     private function handle5xx($response, $uri)
     {
         $status = $response->getStatusCode();