Merge pull request #93 from Shoperti/drop-support-php54-php55

[3.0] Drop support for php54 and php56

.travis.yml

@@ -1,21 +1,19 @@
 language: php
 
 php:
-  - 5.4
-  - 5.5
-  - 5.5.9
   - 5.6
   - 7.0
+  - 7.1
 
 sudo: false
 
 install:
   - travis_retry composer install --no-interaction --prefer-source
 
 script:
-  - if [ "$TRAVIS_PHP_VERSION" != "5.5.9" ] && [ "$TRAVIS_PHP_VERSION" != "5.5" ] && [ "$TRAVIS_PHP_VERSION" != "5.6" ]; then vendor/bin/phpunit; fi
-  - if [ "$TRAVIS_PHP_VERSION" == "5.5.9" ] || [ "$TRAVIS_PHP_VERSION" == "5.5" ] || [ "$TRAVIS_PHP_VERSION" == "5.6" ]; then vendor/bin/phpunit --coverage-clover build/logs/clover.xml; fi
+  - if [ "$TRAVIS_PHP_VERSION" != "5.6" ] && [ "$TRAVIS_PHP_VERSION" != "7.0" ]; then vendor/bin/phpunit; fi
+  - if [ "$TRAVIS_PHP_VERSION" == "5.6" ] || [ "$TRAVIS_PHP_VERSION" == "7.0" ]; then vendor/bin/phpunit --coverage-clover build/logs/clover.xml; fi
 
 after_script:
-  - if [ "$TRAVIS_PHP_VERSION" == "5.5.9" ] || [ "$TRAVIS_PHP_VERSION" == "5.5" ] || [ "$TRAVIS_PHP_VERSION" == "5.6" ]; then wget https://scrutinizer-ci.com/ocular.phar; fi
-  - if [ "$TRAVIS_PHP_VERSION" == "5.5.9" ] || [ "$TRAVIS_PHP_VERSION" == "5.5" ] || [ "$TRAVIS_PHP_VERSION" == "5.6" ]; then php ocular.phar code-coverage:upload --format=php-clover build/logs/clover.xml; fi
+  - if [ "$TRAVIS_PHP_VERSION" == "5.6" ] || [ "$TRAVIS_PHP_VERSION" == "7.0" ]; then wget https://scrutinizer-ci.com/ocular.phar; fi
+  - if [ "$TRAVIS_PHP_VERSION" == "5.6" ] || [ "$TRAVIS_PHP_VERSION" == "7.0" ]; then php ocular.phar code-coverage:upload --format=php-clover build/logs/clover.xml; fi

composer.json

@@ -14,8 +14,8 @@
         }
     ],
     "require": {
-        "php": ">=5.4.0",
-        "guzzlehttp/guzzle": "~5.3|~6.0"
+        "php": ">=5.6.0",
+        "guzzlehttp/guzzle": "~6.0"
     },
     "require-dev": {
         "phpunit/phpunit": "^4.1"

src/Gateways/AbstractGateway.php

@@ -3,7 +3,13 @@
 namespace Shoperti\PayMe\Gateways;
 
 use GuzzleHttp\Client as GuzzleClient;
+use GuzzleHttp\Exception\ConnectException;
+use GuzzleHttp\Exception\TransferException;
+use GuzzleHttp\HandlerStack;
+use GuzzleHttp\Middleware;
 use InvalidArgumentException;
+use Psr\Http\Message\RequestInterface;
+use Psr\Http\Message\ResponseInterface;
 use Shoperti\PayMe\Contracts\GatewayInterface;
 use Shoperti\PayMe\Currency;
 
@@ -71,7 +77,15 @@ public function setConfig($config)
      */
     protected function getHttpClient()
     {
-        return new GuzzleClient();
+        $stack = HandlerStack::create();
+
+        $stack->push(Middleware::retry(function ($retries, RequestInterface $request, ResponseInterface $response = null, TransferException $exception = null) {
+            return $retries < 3 && ($exception instanceof ConnectException || ($response && $response->getStatusCode() >= 500));
+        }, function ($retries) {
+            return (int) pow(2, $retries) * 1000;
+        }));
+
+        return new GuzzleClient(['handler' => $stack]);
     }
 
     /**