Pass request uri as an argument to error handler (see #96)

This is a workaround because changing the error handler signature would
break BC. Removing the request in 3.x was an oversight on my part and
it will most likely be put back in 4.x.

src/JwtAuthentication.php

@@ -141,7 +141,8 @@ public function process(ServerRequestInterface $request, RequestHandlerInterface
         } catch (RuntimeException | DomainException $exception) {
             $response = (new ResponseFactory)->createResponse(401);
             return $this->processError($response, [
-                "message" => $exception->getMessage()
+                "message" => $exception->getMessage(),
+                "uri" => (string)$request->getUri()
             ]);
         }
 

tests/JwtAuthenticationTest.php

@@ -852,4 +852,33 @@ public function testShouldHandlePsr7()
         $this->assertEquals(200, $response->getStatusCode());
         $this->assertEquals("Success", $response->getBody());
     }
+
+    public function testShouldHaveUriInErrorHandlerIssue96()
+    {
+        $request = (new ServerRequestFactory)
+            ->createServerRequest("GET", "https://example.com/api/foo?bar=pop");
+
+        $dummy = null;
+
+        $default = function (ServerRequestInterface $request) {
+            $response = (new ResponseFactory)->createResponse();
+            $response->getBody()->write("Success");
+            return $response;
+        };
+
+        $collection = new MiddlewareCollection([
+            new JwtAuthentication([
+                "secret" => "supersecretkeyyoushouldnotcommit",
+                "error" => function (ResponseInterface $response, $arguments) use (&$dummy) {
+                    $dummy = $arguments["uri"];
+                }
+            ])
+        ]);
+
+        $response = $collection->dispatch($request, $default);
+
+        $this->assertEquals(401, $response->getStatusCode());
+        $this->assertEquals("", $response->getBody());
+        $this->assertEquals("https://example.com/api/foo?bar=pop", $dummy);
+    }
 }