Add http.route to CodeIgniter

src/Integrations/Integrations/CodeIgniter/V2/CodeIgniterIntegration.php

@@ -165,6 +165,8 @@ function (SpanData $span, $args, $retval, $ex) use ($service, &$registered_cache
                 return false;
             }
         );
+
+        self::setHttpRoute($router, $rootSpan);
     }
 
     /**
@@ -225,4 +227,38 @@ function (SpanData $span, $args, $retval, $ex) use ($adapter, $service) {
             }
         );
     }
+
+    /*
+     * Replicate CodeIgniter's route parsing, as matching key is never stored or returned in the framework.
+     */
+    private static function setHttpRoute($router, $rootSpan) {
+        // Turn the segment array into a URI string
+        $uri = implode('/', $router->uri->segments);
+
+        // Is there a literal match?  If so we're done
+        if (isset($router->routes[$uri]))
+        {
+            $rootSpan->meta[Tag::HTTP_ROUTE] = $uri;
+            return;
+        }
+
+        // Loop through the route array looking for wild-cards
+        foreach ($router->routes as $key => $val)
+        {
+            $origKey = $key;
+            // Convert wild-cards to RegEx
+            $key = str_replace(':any', '.+', str_replace(':num', '[0-9]+', $key));
+
+            // Does the RegEx match?
+            if (preg_match('#^'.$key.'$#', $uri))
+            {
+                $rootSpan->meta[Tag::HTTP_ROUTE] = $origKey;
+                return;
+            }
+        }
+
+        // If we got this far it means we didn't encounter a
+        // matching route so we'll set the site default route
+        $rootSpan->meta[Tag::HTTP_ROUTE] = $uri;
+    }
 }

tests/Frameworks/CodeIgniter/Version_2_2/application/config/routes.php

@@ -42,6 +42,7 @@
 $route['404_override'] = '';
 $route['error'] = 'error_';
 
+$route['parameterized/(:any)'] = "parameterized/customAction/$1";
 
 /* End of file routes.php */
 /* Location: ./application/config/routes.php */

tests/Frameworks/CodeIgniter/Version_2_2/application/controllers/parameterized.php

@@ -0,0 +1,7 @@
+<?php
+
+class Parameterized extends CI_Controller {
+    function customAction($param) {
+        echo 'custom ' . $param;
+    }
+}

tests/Integrations/CodeIgniter/V2_2/CommonScenariosTest.php

@@ -55,6 +55,7 @@ public function provideSpecs()
                         'app.endpoint' => 'Simple::index',
                         Tag::SPAN_KIND => 'server',
                         Tag::COMPONENT => 'codeigniter',
+                        Tag::HTTP_ROUTE => 'simple',
                     ])->withChildren([
                         SpanAssertion::build(
                             'Simple.index',
@@ -79,6 +80,7 @@ public function provideSpecs()
                         'app.endpoint' => 'Simple_View::index',
                         Tag::SPAN_KIND => 'server',
                         Tag::COMPONENT => 'codeigniter',
+                        Tag::HTTP_ROUTE => 'simple_view',
                     ])->withChildren([
                         SpanAssertion::build(
                             'Simple_View.index',
@@ -113,6 +115,7 @@ public function provideSpecs()
                         'app.endpoint' => 'Error_::index',
                         Tag::SPAN_KIND => 'server',
                         Tag::COMPONENT => 'codeigniter',
+                        Tag::HTTP_ROUTE => 'error'
                     ])
                     ->setError("Exception", "Uncaught Exception: datadog in %s:%d")
                     ->withExistingTagsNames(['error.stack'])
@@ -127,6 +130,31 @@ public function provideSpecs()
                         ])->setError('Exception', 'datadog', true),
                     ]),
                 ],
+                'A GET request to a route with a parameter' => [
+                    SpanAssertion::build(
+                        'codeigniter.request',
+                        'codeigniter_test_app',
+                        'web',
+                        'GET /parameterized/paramValue'
+                    )->withExactTags([
+                        Tag::HTTP_METHOD => 'GET',
+                        Tag::HTTP_URL => 'http://localhost:9999/parameterized/paramValue',
+                        Tag::HTTP_STATUS_CODE => '200',
+                        'app.endpoint' => 'Parameterized::customAction',
+                        Tag::SPAN_KIND => 'server',
+                        Tag::COMPONENT => 'codeigniter',
+                        Tag::HTTP_ROUTE =>  'parameterized/(:any)',
+                    ])->withChildren([
+                        SpanAssertion::build(
+                            'Parameterized.customAction',
+                            'codeigniter_test_app',
+                            Type::WEB_SERVLET,
+                            'Parameterized.customAction'
+                        )->withExactTags([
+                            Tag::COMPONENT => 'codeigniter',
+                        ])
+                    ]),
+                ],
             ]
         );
     }

tests/Integrations/CodeIgniter/V2_2/ExitTest.php

@@ -43,6 +43,7 @@ public function testScenario()
                     'app.endpoint' => 'Exits::index',
                     Tag::SPAN_KIND => 'server',
                     Tag::COMPONENT => 'codeigniter',
+                    Tag::HTTP_ROUTE => 'exits'
                 ])->withChildren([
                     SpanAssertion::build(
                         'Exits.index',

tests/Integrations/CodeIgniter/V2_2/NoCI_ControllertTest.php

@@ -42,6 +42,7 @@ public function testScenario()
                     Tag::HTTP_STATUS_CODE => '200',
                     Tag::SPAN_KIND => 'server',
                     Tag::COMPONENT => 'codeigniter',
+                    Tag::HTTP_ROUTE => 'health_check/ping',
                 ])->withChildren([
                     SpanAssertion::build(
                         'Health_check.ping',