refactor(agent): cleanup guzzle instrumentation #498
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| Original file line number | Diff line number | Diff line change | ||||||
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@@ -9,14 +9,14 @@ | |||||||
| * It is a required component in Drupal 8, and strongly recommended by other | ||||||||
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There was a problem hiding this comment. This file needs to be clang formatted |
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| * frameworks, including Symfony 2 and 3. | ||||||||
| * | ||||||||
| * Our approach for Guzzle 6-7 is to register middleware on every client that | ||||||||
| * adds our headers to the request object, handles responses, and creates | ||||||||
| * metrics and trace nodes using the internal RequestHandler class declared | ||||||||
| * below. | ||||||||
| * | ||||||||
| * There is one issue with this approach, which is that the middleware is | ||||||||
| * called when the request is created, rather than when the request is sent. As | ||||||||
| * Guzzle 6-7 removed the event system that allowed us to know exactly when the | ||||||||
| * request was sent, we are unable to get the time of the request being sent | ||||||||
| * without instrumenting much more deeply into Guzzle's handlers. We consider | ||||||||
| * this to be an obscure enough edge case that we are not doing this work at | ||||||||
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@@ -65,12 +65,11 @@ | |||||||
| */ | ||||||||
| #if ZEND_MODULE_API_NO >= ZEND_5_5_X_API_NO | ||||||||
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||||||||
| /* | ||||||||
| * True global for the RequestHandler class entry. | ||||||||
| */ | ||||||||
| zend_class_entry* nr_guzzle6_requesthandler_ce; | ||||||||
| int php_version_compare(char*, char*); | ||||||||
|
There was a problem hiding this comment. This seems unnecessary. Instead,
Suggested change
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| /* | ||||||||
| * Arginfo for the RequestHandler methods. | ||||||||
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@@ -107,7 +106,7 @@ static void nr_guzzle6_requesthandler_handle_response(zval* handler, | |||||||
| zval* response | ||||||||
| TSRMLS_DC) { | ||||||||
| nr_segment_t* segment = NULL; | ||||||||
| nr_segment_external_params_t external_params = {.library = "Guzzle 6-7"}; | ||||||||
| zval* request; | ||||||||
| zval* method; | ||||||||
| zval* status; | ||||||||
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@@ -140,7 +139,7 @@ static void nr_guzzle6_requesthandler_handle_response(zval* handler, | |||||||
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| if (NRPRG(txn) && NRTXN(special_flags.debug_cat)) { | ||||||||
| nrl_verbosedebug( | ||||||||
| NRL_CAT, "CAT: outbound response: transport='Guzzle 6-7' %s=" NRP_FMT, | ||||||||
| X_NEWRELIC_APP_DATA, NRP_CAT(external_params.encoded_response_header)); | ||||||||
| } | ||||||||
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@@ -206,14 +205,14 @@ static PHP_NAMED_FUNCTION(nr_guzzle6_requesthandler_construct) { | |||||||
| zend_update_property(Z_OBJCE_P(this_obj), ZVAL_OR_ZEND_OBJECT(this_obj), | ||||||||
| NR_PSTR("request"), request TSRMLS_CC); | ||||||||
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| nr_guzzle_obj_add(this_obj, "Guzzle 6-7" TSRMLS_CC); | ||||||||
| } | ||||||||
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||||||||
| /* | ||||||||
| * Proto : void RequestHandler::onFulfilled(Psr\Http\Message\ResponseInterface | ||||||||
| * $response) | ||||||||
| * | ||||||||
| * Purpose : Called when a Guzzle 6-7 request promise is fulfilled. | ||||||||
| * | ||||||||
| * Params : 1. The response object. | ||||||||
| */ | ||||||||
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@@ -257,7 +256,7 @@ static PHP_NAMED_FUNCTION(nr_guzzle6_requesthandler_onfulfilled) { | |||||||
| * Proto : void | ||||||||
| * RequestHandler::onRejected(GuzzleHttp\Exception\TransferException $e) | ||||||||
| * | ||||||||
| * Purpose : Called when a Guzzle 6-7 request promise failed. | ||||||||
| * | ||||||||
| * Params : 1. The exception object. | ||||||||
| */ | ||||||||
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@@ -340,76 +339,22 @@ const zend_function_entry nr_guzzle6_requesthandler_functions[] | |||||||
| nr_guzzle6_requesthandler_onrejected_arginfo, | ||||||||
| ZEND_ACC_PUBLIC) PHP_FE_END}; | ||||||||
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| static void nr_guzzle_minit(){ | ||||||||
| zend_class_entry ce; | ||||||||
| char nr_guzzle_request_handler[] = "newrelic\\Guzzle\\RequestHandler"; | ||||||||
| if (0 == NRINI(guzzle_enabled)) { | ||||||||
| return; | ||||||||
| } | ||||||||
| INIT_CLASS_ENTRY(ce, nr_guzzle_request_handler, | ||||||||
| nr_guzzle6_requesthandler_functions); | ||||||||
| nr_guzzle6_requesthandler_ce | ||||||||
| = nr_php_zend_register_internal_class_ex(&ce, NULL TSRMLS_CC); | ||||||||
| zend_declare_property_null(nr_guzzle6_requesthandler_ce, NR_PSTR("request"), | ||||||||
| ZEND_ACC_PRIVATE TSRMLS_CC); | ||||||||
| } | ||||||||
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| static void nr_guzzle_enable(){ | ||||||||
| int _retval; | ||||||||
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||||||||
| if (0 == NRINI(guzzle_enabled)) { | ||||||||
| return; | ||||||||
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@@ -429,20 +374,20 @@ void nr_guzzle6_enable(TSRMLS_D) { | |||||||
| * as a standalone file, so we can use a normal namespace declaration to | ||||||||
| * avoid possible clashes. | ||||||||
| */ | ||||||||
| _retval = zend_eval_string( | ||||||||
| "namespace newrelic\\Guzzle;" | ||||||||
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| "use Psr\\Http\\Message\\RequestInterface;" | ||||||||
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| /* | ||||||||
| * Start by adding the outbound CAT/DT/Synthetics headers to the request. | ||||||||
| */ | ||||||||
| "if (!function_exists('newrelic\\Guzzle\\middleware')) {" | ||||||||
| " function middleware(callable $handler) {" | ||||||||
| " return function (RequestInterface $request, array $options) use " | ||||||||
| "($handler) {" | ||||||||
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||||||||
| " foreach (newrelic_get_request_metadata('Guzzle') as $k => $v) {" | ||||||||
| " $request = $request->withHeader($k, $v);" | ||||||||
| " }" | ||||||||
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@@ -459,43 +404,116 @@ void nr_guzzle6_enable(TSRMLS_D) { | |||||||
| " };" | ||||||||
| " }" | ||||||||
| "}", | ||||||||
| NULL, "newrelic/Guzzle" TSRMLS_CC); | ||||||||
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| if (SUCCESS == _retval) { | ||||||||
| nr_php_wrap_user_function(NR_PSTR("GuzzleHttp\\Client::__construct"), | ||||||||
| nr_guzzle_client_construct_helper TSRMLS_CC); | ||||||||
| }else { | ||||||||
| nrl_warning(NRL_FRAMEWORK, | ||||||||
| "%s: error evaluating PHP code; not installing handler", | ||||||||
| __func__); | ||||||||
| } | ||||||||
| } | ||||||||
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||||||||
| /* | ||||||||
| * This function checks if the guzzle middleware is callable and adds the | ||||||||
| * middleware (newrelic\Guzzle\middleware) to the GuzzleHttp\Client | ||||||||
| * handler stack by invoking push(). If the middleware is not callable, the | ||||||||
| * function exits by using the goto jump statement | ||||||||
| */ | ||||||||
| NR_PHP_WRAPPER_START(nr_guzzle_client_construct_helper){ | ||||||||
|
There was a problem hiding this comment. Maybe add a brief doc comment describing what this function does? I.e. it adds There was a problem hiding this comment. Good idea! I have added a brief description that describes what this function is doing f3ac653 |
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| zval* this_var = nr_php_scope_get(NR_EXECUTE_ORIG_ARGS TSRMLS_CC); | ||||||||
| zval* retval; | ||||||||
| int guzzle_version = 6; | ||||||||
| char *version = nr_guzzle_version(this_var); | ||||||||
|
There was a problem hiding this comment. Yes, version also needs to be freed because the nr_guzzle_version function allocates memory for a new string and does not free it, which means the caller is responsible for freeing the result. 29f4551 |
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| if (php_version_compare(version, "7") >= 0){ | ||||||||
| guzzle_version = 7; | ||||||||
| } | ||||||||
| nr_free(version); | ||||||||
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||||||||
| (void)wraprec; | ||||||||
| NR_UNUSED_SPECIALFN; | ||||||||
| NR_PHP_WRAPPER_CALL; | ||||||||
| /* | ||||||||
| * Get our middleware callable (which is just a string), and make sure it's | ||||||||
| * actually callable before we invoke push(). (See also PHP-1184.) | ||||||||
| */ | ||||||||
| char *str_middleware = "newrelic\\Guzzle\\middleware"; | ||||||||
| zval* middleware = nr_php_zval_alloc(); | ||||||||
| nr_php_zval_str(middleware, str_middleware); | ||||||||
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| if (!nr_php_is_zval_valid_callable(middleware TSRMLS_CC)) { | ||||||||
| nrl_verbosedebug(NRL_FRAMEWORK, | ||||||||
| "%s: middleware string is not considered callable", | ||||||||
| __func__); | ||||||||
| char* error_message = nr_formatf( | ||||||||
|
There was a problem hiding this comment. I don't see |
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| "Supportability/library/Guzzle %d/MiddlewareNotCallable", guzzle_version); | ||||||||
| nrm_force_add(NRTXN(unscoped_metrics), error_message, 0); | ||||||||
| nr_free(error_message); | ||||||||
| goto end; | ||||||||
| } | ||||||||
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| zend_class_entry* guzzle_client_ce = nr_php_find_class("guzzlehttp\\client" | ||||||||
| TSRMLS_CC); | ||||||||
| if (NULL == guzzle_client_ce) { | ||||||||
| nrl_verbosedebug(NRL_FRAMEWORK, | ||||||||
| "%s: unable to get class entry for GuzzleHttp\\Client", | ||||||||
| __func__); | ||||||||
| goto end; | ||||||||
| } | ||||||||
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| zval* config = nr_php_get_zval_object_property_with_class( | ||||||||
| this_var, guzzle_client_ce, "config" TSRMLS_CC); | ||||||||
| if (!nr_php_is_zval_valid_array(config)) { | ||||||||
| goto end; | ||||||||
| } | ||||||||
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| zval* handler_stack = nr_php_zend_hash_find(Z_ARRVAL_P(config), "handler"); | ||||||||
| if (!nr_php_object_instanceof_class(handler_stack, | ||||||||
| "GuzzleHttp\\HandlerStack" TSRMLS_CC)) { | ||||||||
| goto end; | ||||||||
| } | ||||||||
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| retval = nr_php_call(handler_stack, "push", middleware); | ||||||||
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| nr_php_zval_free(&retval); | ||||||||
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| end: | ||||||||
| nr_php_zval_free(&middleware); | ||||||||
| nr_php_scope_release(&this_var); | ||||||||
| } | ||||||||
| NR_PHP_WRAPPER_END | ||||||||
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| /* | ||||||||
| * Guzzle 7 requires PHP 7.2.0 or later, which is why we will not build Guzzle 7 | ||||||||
| * support on older versions and will instead provide simple stubs for the two | ||||||||
| * exported functions to avoid linking errors. | ||||||||
| */ | ||||||||
| #if ZEND_MODULE_API_NO >= ZEND_7_2_X_API_NO | ||||||||
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| void nr_guzzle7_enable(TSRMLS_D) { | ||||||||
| nr_guzzle_enable(); | ||||||||
| } | ||||||||
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| #else /* PHP < 7.2 */ | ||||||||
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| void nr_guzzle7_enable(TSRMLS_D) { | ||||||||
| NR_UNUSED_TSRMLS | ||||||||
| } | ||||||||
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| #endif /* 7.2.x */ | ||||||||
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| void nr_guzzle6_enable(TSRMLS_D) { | ||||||||
| nr_guzzle_enable(); | ||||||||
| } | ||||||||
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| void nr_guzzle6_minit(TSRMLS_D) { | ||||||||
| nr_guzzle_minit(); | ||||||||
| } | ||||||||
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| #else /* PHP < 5.5 */ | ||||||||
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| void nr_guzzle6_enable(TSRMLS_D) { | ||||||||
| NR_UNUSED_TSRMLS | ||||||||
| } | ||||||||
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@@ -504,4 +522,4 @@ void nr_guzzle6_minit(TSRMLS_D) { | |||||||
| NR_UNUSED_TSRMLS; | ||||||||
| } | ||||||||
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| #endif /* 5.5.x */ | ||||||||
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There was a problem hiding this comment.
Suggested change
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