[PHP] 6.0.x make php implementation depend on meta packages for http client

modules/openapi-generator/src/main/resources/php/ApiException.mustache

@@ -18,7 +18,10 @@
 
 namespace {{invokerPackage}};
 
-use \Exception;
+use Exception;
+use Http\Client\Exception\RequestException;
+use Psr\Http\Message\RequestInterface;
+use Psr\Http\Message\ResponseInterface;
 
 /**
  * ApiException Class Doc Comment
@@ -28,13 +31,13 @@ use \Exception;
  * @author   OpenAPI Generator team
  * @link     https://openapi-generator.tech
  */
-class ApiException extends Exception
+class ApiException extends RequestException
 {
 
     /**
      * The HTTP body of the server response either as Json or string.
      *
-     * @var \stdClass|string|null
+     * @var string|null
      */
     protected $responseBody;
 
@@ -52,19 +55,18 @@ class ApiException extends Exception
      */
     protected $responseObject;
 
-    /**
-     * Constructor
-     *
-     * @param string                $message         Error message
-     * @param int                   $code            HTTP status code
-     * @param string[]|null         $responseHeaders HTTP response header
-     * @param \stdClass|string|null $responseBody    HTTP decoded body of the server response either as \stdClass or string
-     */
-    public function __construct($message = "", $code = 0, $responseHeaders = [], $responseBody = null)
-    {
-        parent::__construct($message, $code);
-        $this->responseHeaders = $responseHeaders;
-        $this->responseBody = $responseBody;
+    public function __construct(
+        $message,
+        RequestInterface $request,
+        ResponseInterface $response = null,
+        Exception $previous = null
+    ) {
+        parent::__construct($message, $request, $previous);
+        if ($response) {
+            $this->responseHeaders = $response->getHeaders();
+            $this->responseBody = (string) $response->getBody();
+            $this->code = $response->getStatusCode();
+        }
     }
 
     /**
@@ -108,4 +110,4 @@ class ApiException extends Exception
     {
         return $this->responseObject;
     }
-}
+}

modules/openapi-generator/src/main/resources/php/README.mustache

@@ -34,6 +34,18 @@ To install the bindings via [Composer](https://getcomposer.org/), add the follow
 
 Then run `composer install`
 
+Your project is free to choose the http client of your choice
+Please require packages that will provide http client functionality:
+https://packagist.org/providers/psr/http-client-implementation
+https://packagist.org/providers/php-http/async-client-implementation
+https://packagist.org/providers/psr/http-factory-implementation
+
+As an example:
+
+```
+composer require guzzlehttp/guzzle php-http/guzzle7-adapter http-interop/http-factory-guzzle
+```
+
 ### Manual Installation
 
 Download the files and include `autoload.php`:
@@ -54,8 +66,8 @@ require_once(__DIR__ . '/vendor/autoload.php');
 {{#apiInfo}}{{#apis}}{{#-first}}{{#operations}}{{#operation}}{{#-first}}
 {{> php_doc_auth_partial}}
 $apiInstance = new {{invokerPackage}}\Api\{{classname}}(
-    // If you want use custom http client, pass your client which implements `GuzzleHttp\ClientInterface`.
-    // This is optional, `GuzzleHttp\Client` will be used as default.
+    // If you want use custom http client, pass your client which implements `Psr\Http\Client\ClientInterface`.
+    // This is optional, `Psr18ClientDiscovery` will be used to find http client. For instance `GuzzleHttp\Client` implements that interface
     new GuzzleHttp\Client(){{#hasAuthMethods}},
     $config{{/hasAuthMethods}}
 );