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API CHANGE #2922: RequestHandler:: now inherit

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git-svn-id: svn://svn.silverstripe.com/silverstripe/open/modules/sapphire/trunk@64958 467b73ca-7a2a-4603-9d3b-597d59a354a9
This commit is contained in:
Sam Minnee 2008-10-30 22:28:01 +00:00
parent cd699e3d89
commit 132957b5c2
2 changed files with 79 additions and 42 deletions
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104
core/control/RequestHandler.php
View File

@ -77,58 +77,68 @@ class RequestHandler extends ViewableData {
function handleRequest($request) {
$this->request = $request;
foreach($this->stat('url_handlers') as $rule => $action) {
if(isset($_REQUEST['debug_request'])) Debug::message("Testing '$rule' with '" . $request->remaining() . "' on $this->class");
if($params = $request->match($rule, true)) {
// FIXME: This unnecessary coupling was added to fix a bug in Image_Uploader.
if($this instanceof Controller) $this->urlParams = $request->allParams();
// $handlerClass is used to step up the class hierarchy to implement url_handlers inheritance
$handlerClass = $this->class;
// We stop after RequestHandler; in other words, at ViewableData
while($handlerClass != 'ViewableData') {
// Todo: ajshort's stat rewriting could be useful here.
$urlHandlers = eval("return $handlerClass::\$url_handlers;");
if(isset($_REQUEST['debug_request'])) {
Debug::message("Rule '$rule' matched to action '$action' on $this->class. Latest request params: " . var_export($request->latestParams(), true));
}
if($urlHandlers) foreach($urlHandlers as $rule => $action) {
if(isset($_REQUEST['debug_request'])) Debug::message("Testing '$rule' with '" . $request->remaining() . "' on $this->class");
if($params = $request->match($rule, true)) {
// FIXME: This unnecessary coupling was added to fix a bug in Image_Uploader.
if($this instanceof Controller) $this->urlParams = $request->allParams();
// Actions can reference URL parameters, eg, '$Action/$ID/$OtherID' => '$Action',
if($action[0] == '$') $action = $params[substr($action,1)];
if($this->checkAccessAction($action)) {
if(!$action) {
if(isset($_REQUEST['debug_request'])) Debug::message("Action not set; using default action method name 'index'");
$action = "index";
} else if(!is_string($action)) {
user_error("Non-string method name: " . var_export($action, true), E_USER_ERROR);
if(isset($_REQUEST['debug_request'])) {
Debug::message("Rule '$rule' matched to action '$action' on $this->class. Latest request params: " . var_export($request->latestParams(), true));
}
$result = $this->$action($request);
} else {
return $this->httpError(403, "Action '$action' isn't allowed on class $this->class");
// Actions can reference URL parameters, eg, '$Action/$ID/$OtherID' => '$Action',
if($action[0] == '$') $action = $params[substr($action,1)];
if($this->checkAccessAction($action)) {
if(!$action) {
if(isset($_REQUEST['debug_request'])) Debug::message("Action not set; using default action method name 'index'");
$action = "index";
} else if(!is_string($action)) {
user_error("Non-string method name: " . var_export($action, true), E_USER_ERROR);
}
$result = $this->$action($request);
} else {
return $this->httpError(403, "Action '$action' isn't allowed on class $this->class");
}
if($result instanceof HTTPResponse && $result->isError()) {
if(isset($_REQUEST['debug_request'])) Debug::message("Rule resulted in HTTP error; breaking");
return $result;
}
// If we return a RequestHandler, call handleRequest() on that, even if there is no more URL to parse.
// It might have its own handler. However, we only do this if we haven't just parsed an empty rule ourselves,
// to prevent infinite loops
if(!$request->isEmptyPattern($rule) && is_object($result) && $result instanceof RequestHandler) {
$returnValue = $result->handleRequest($request);
// Array results can be used to handle
if(is_array($returnValue)) $returnValue = $this->customise($returnValue);
return $returnValue;
// If we return some other data, and all the URL is parsed, then return that
} else if($request->allParsed()) {
return $result;
// But if we have more content on the URL and we don't know what to do with it, return an error.
} else {
return $this->httpError(400, "I can't handle sub-URLs of a $this->class object.");
}
return $this;
}
if($result instanceof HTTPResponse && $result->isError()) {
if(isset($_REQUEST['debug_request'])) Debug::message("Rule resulted in HTTP error; breaking");
return $result;
}
// If we return a RequestHandler, call handleRequest() on that, even if there is no more URL to parse.
// It might have its own handler. However, we only do this if we haven't just parsed an empty rule ourselves,
// to prevent infinite loops
if(!$request->isEmptyPattern($rule) && is_object($result) && $result instanceof RequestHandler) {
$returnValue = $result->handleRequest($request);
// Array results can be used to handle
if(is_array($returnValue)) $returnValue = $this->customise($returnValue);
return $returnValue;
// If we return some other data, and all the URL is parsed, then return that
} else if($request->allParsed()) {
return $result;
// But if we have more content on the URL and we don't know what to do with it, return an error.
} else {
return $this->httpError(400, "I can't handle sub-URLs of a $this->class object.");
}
break;
}
$handlerClass = get_parent_class($handlerClass);
}
// If nothing matches, return this object

29
tests/RequestHandlingTest.php
View File

@ -72,6 +72,16 @@ class RequestHandlingTest extends SapphireTest {
$response = Director::test("testParentBase/testChildBase/method/1/2");
$this->assertEquals("This is a method on the controller: 1, 2", $response->getBody());
}
function testInheritedUrlHandlers() {
/* $url_handlers can be defined on any class, and */
$response = Director::test("testGoodBase1/TestForm/fields/SubclassedField/something");
$this->assertEquals("customSomething", $response->getBody());
/* However, if the subclass' url_handlers don't match, then the parent class' url_handlers will be used */
$response = Director::test("testGoodBase1/TestForm/fields/SubclassedField");
$this->assertEquals("SubclassedField requested", $response->getBody());
}
}
/**
@ -127,7 +137,8 @@ class RequestHandlingTest_Controller extends Controller {
function TestForm() {
return new RequestHandlingTest_Form($this, "TestForm", new FieldSet(
new RequestHandlingTest_FormField("MyField")
new RequestHandlingTest_FormField("MyField"),
new RequestHandlingTest_SubclassedFormField("SubclassedField")
), new FieldSet(
new FormAction("myAction")
));
@ -195,3 +206,19 @@ class RequestHandlingTest_FormField extends FormField {
}
}
/**
* Form field for the test
*/
class RequestHandlingTest_SubclassedFormField extends RequestHandlingTest_FormField {
// We have some url_handlers defined that override RequestHandlingTest_FormField handlers.
// We will confirm that the url_handlers inherit.
static $url_handlers = array(
'something' => 'customSomething',
);
function customSomething() {
return "customSomething";
}
}