add HTTP method override middleware #2040

Slim/Middleware/MethodOverrideMiddleware.php

@@ -0,0 +1,60 @@
+<?php
+/**
+ * Slim Framework (https://slimframework.com)
+ *
+ * @link      https://github.com/slimphp/Slim
+ * @copyright Copyright (c) 2011-2017 Josh Lockhart
+ * @license   https://github.com/slimphp/Slim/blob/4.x/LICENSE.md (MIT License)
+ */
+namespace Slim\Middleware;
+
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\ServerRequestInterface;
+
+/**
+ * Override HTTP Request method by given body param or custom header
+ */
+class MethodOverrideMiddleware
+{
+    /**
+     * Invoke
+     *
+     * @param  ServerRequestInterface $request   PSR7 server request
+     * @param  ResponseInterface      $response  PSR7 response
+     * @param  callable               $next      Middleware callable
+     * @return ResponseInterface                 PSR7 response
+     */
+    public function __invoke(ServerRequestInterface $request, ResponseInterface $response, callable $next)
+    {
+        $method = $this->getOverrideMethod($request);
+
+        return $next($request->withMethod($method), $response);
+    }
+
+    /**
+     * @param ServerRequestInterface $request
+     * @return string
+     */
+    protected function getOverrideMethod(ServerRequestInterface $request)
+    {
+        $method = $request->getHeaderLine('X-Http-Method-Override');
+
+        if (!$method && strtoupper($request->getMethod()) == 'POST') {
+            $body = $request->getParsedBody();
+
+            if (!empty($body['_METHOD'])) {
+                $method = $body['_METHOD'];
+            }
+
+            if ($request->getBody()->eof()) {
+                $request->getBody()->rewind();
+            }
+        }
+
+        if (!$method) {
+            $method = $request->getMethod();
+        }
+
+        return $method;
+    }
+}

tests/Middleware/MethodOverrideMiddlewareTest.php

@@ -0,0 +1,111 @@
+<?php
+/**
+ * Slim Framework (https://slimframework.com)
+ *
+ * @link      https://github.com/slimphp/Slim
+ * @copyright Copyright (c) 2011-2017 Josh Lockhart
+ * @license   https://github.com/slimphp/Slim/blob/4.x/LICENSE.md (MIT License)
+ */
+namespace Slim\Tests\Middleware;
+
+use PHPUnit\Framework\TestCase;
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\ServerRequestInterface;
+use Slim\Http\Headers;
+use Slim\Http\Request;
+use Slim\Http\RequestBody;
+use Slim\Http\Response;
+use Slim\Http\Uri;
+use Slim\Middleware\MethodOverrideMiddleware;
+
+/**
+ * @covers \Slim\Middleware\MethodOverrideMiddleware
+ */
+class MethodOverrideMiddlewareTest extends TestCase
+{
+    public function testHeader()
+    {
+        $mw = new MethodOverrideMiddleware();
+
+        $uri = new Uri('http', 'example.com');
+        $headers = new Headers([
+            'HTTP_X_HTTP_METHOD_OVERRIDE' => 'PUT',
+        ]);
+        $request = new Request('GET', $uri, $headers, [], [], new RequestBody());
+        $response = new Response();
+
+        $next = function (ServerRequestInterface $req, ResponseInterface $res) {
+            $this->assertEquals('PUT', $req->getMethod());
+
+            return $res;
+        };
+        \Closure::bind($next, $this);
+
+        $mw($request, $response, $next);
+    }
+
+    public function testBodyParam()
+    {
+        $mw = new MethodOverrideMiddleware();
+
+        $uri = new Uri('http', 'example.com');
+        $body = new RequestBody();
+        $body->write('_METHOD=PUT');
+        $headers = new Headers([
+            'Content-Type' => 'application/x-www-form-urlencoded',
+        ]);
+        $request = new Request('POST', $uri, $headers, [], [], $body);
+        $response = new Response();
+
+        $next = function (ServerRequestInterface $req, ResponseInterface $res) {
+            $this->assertEquals('PUT', $req->getMethod());
+
+            return $res;
+        };
+        \Closure::bind($next, $this);
+
+        $mw($request, $response, $next);
+    }
+
+    public function testHeaderPreferred()
+    {
+        $mw = new MethodOverrideMiddleware();
+
+        $uri = new Uri('http', 'example.com');
+        $body = new RequestBody();
+        $body->write('_METHOD=PUT');
+        $headers = new Headers([
+            'Content-Type' => 'application/x-www-form-urlencoded',
+            'HTTP_X_HTTP_METHOD_OVERRIDE' => 'DELETE',
+        ]);
+        $request = new Request('POST', $uri, $headers, [], [], $body);
+        $response = new Response();
+
+        $next = function (ServerRequestInterface $req, ResponseInterface $res) {
+            $this->assertEquals('DELETE', $req->getMethod());
+
+            return $res;
+        };
+        \Closure::bind($next, $this);
+
+        $mw($request, $response, $next);
+    }
+
+    public function testNoOverride()
+    {
+        $mw = new MethodOverrideMiddleware();
+
+        $uri = new Uri('http', 'example.com');
+        $request = new Request('POST', $uri, new Headers(), [], [], new RequestBody());
+        $response = new Response();
+
+        $next = function (ServerRequestInterface $req, ResponseInterface $res) {
+            $this->assertEquals('POST', $req->getMethod());
+
+            return $res;
+        };
+        \Closure::bind($next, $this);
+
+        $mw($request, $response, $next);
+    }
+}