mirror of
https://github.com/silverstripe/silverstripe-framework
synced 2024-10-22 14:05:37 +02:00
1f512519e1
git-svn-id: svn://svn.silverstripe.com/silverstripe/open/modules/sapphire/trunk@51914 467b73ca-7a2a-4603-9d3b-597d59a354a9
248 lines
8.4 KiB
PHP
248 lines
8.4 KiB
PHP
<?php
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/**
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* Sapphire's generic RESTful server.
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*
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* NOTE: This is an alpha module and its API is currently very volatile. It functions, but it might change radically
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* before the next release!
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*
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* This class gives your application a RESTful API for free. All you have to do is define static $api_access = true on
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* the appropriate DataObjects. You will need to ensure that all of your data manipulation and security is defined in
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* your model layer (ie, the DataObject classes) and not in your Controllers. This is the recommended design for Sapphire
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* applications.
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*
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* - GET /api/v1/(ClassName)/(ID) - gets a database record
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* - GET /api/v1/(ClassName)/(ID)/(Relation) - get all of the records linked to this database record by the given reatlion (NOT IMPLEMENTED YET)
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* - GET /api/v1/(ClassName)?(Field)=(Val)&(Field)=(Val) - searches for matching database records (NOT IMPLEMENTED YET)
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*
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* - PUT /api/v1/(ClassName)/(ID) - updates a database record (NOT IMPLEMENTED YET)
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* - PUT /api/v1/(ClassName)/(ID)/(Relation) - updates a relation, replacing the existing record(s) (NOT IMPLEMENTED YET)
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* - POST /api/v1/(ClassName)/(ID)/(Relation) - updates a relation, appending to the existing record(s) (NOT IMPLEMENTED YET)
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*
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* - DELETE /api/v1/(ClassName)/(ID) - deletes a database record (NOT IMPLEMENTED YET)
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* - DELETE /api/v1/(ClassName)/(ID)/(Relation)/(ForeignID) - remove the relationship between two database records, but don't actually delete the foreign object (NOT IMPLEMENTED YET)
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*
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* - POST /api/v1/(ClassName)/(ID)/(MethodName) - executes a method on the given object (e.g, publish)
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*/
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class RestfulServer extends Controller {
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protected static $api_base = "api/v1/";
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/**
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* This handler acts as the switchboard for the controller.
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* Since no $Action url-param is set, all requests are sent here.
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*/
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function index() {
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ContentNegotiator::disable();
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$requestMethod = $_SERVER['REQUEST_METHOD'];
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$className = $this->urlParams['ClassName'];
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$id = $this->urlParams['ID'];
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switch($requestMethod) {
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case 'GET':
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return $this->getHandler($className, $id);
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case 'PUT':
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return $this->putHandler($className, $id);
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case 'DELETE':
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return $this->deleteHandler($className, $id);
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case 'POST':
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}
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}
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/**
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* Handler for object read.
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*
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* The data object will be returned in the following format:
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*
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* <ClassName>
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* <FieldName>Value</FieldName>
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* ...
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* <HasOneRelName id="ForeignID" href="LinkToForeignRecordInAPI" />
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* ...
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* <HasManyRelName>
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* <ForeignClass id="ForeignID" href="LinkToForeignRecordInAPI" />
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* <ForeignClass id="ForeignID" href="LinkToForeignRecordInAPI" />
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* </HasManyRelName>
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* ...
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* <ManyManyRelName>
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* <ForeignClass id="ForeignID" href="LinkToForeignRecordInAPI" />
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* <ForeignClass id="ForeignID" href="LinkToForeignRecordInAPI" />
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* </ManyManyRelName>
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* </ClassName>
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*
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* Access is controlled by two variables:
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*
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* - static $api_access must be set. This enables the API on a class by class basis
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* - $obj->canView() must return true. This lets you implement record-level security
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*/
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protected function getHandler($className, $id) {
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$obj = DataObject::get_by_id($className, $id);
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if(!$obj) {
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return $this->notFound();
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}
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// TO DO - inspect that Accept header as well. $_GET['accept'] can still be checked, as it's handy for debugging
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$contentType = isset($_GET['accept']) ? $_GET['accept'] : 'text/xml';
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if($obj->stat('api_access') && $obj->canView()) {
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switch($contentType) {
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case "text/xml":
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$this->getResponse()->addHeader("Content-type", "text/xml");
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return $this->dataObjectAsXML($obj);
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case "text/json":
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$this->getResponse()->addHeader("Content-type", "text/json");
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return $this->dataObjectAsJSON($obj);
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case "text/html":
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case "application/xhtml+xml":
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$this->getResponse()->addHeader("Content-type", "text/json");
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return $this->dataObjectAsXHTML($obj);
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}
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} else {
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return $this->permissionFailure();
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}
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}
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/**
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* Generate an XML representation of the given DataObject.
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*/
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protected function dataObjectAsXML(DataObject $obj) {
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$className = $obj->class;
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$id = $obj->ID;
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$json = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<$className>\n";
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foreach($obj->db() as $fieldName => $fieldType) {
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$json .= "<$fieldName>" . Convert::raw2xml($obj->$fieldName) . "</$fieldName>\n";
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}
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foreach($obj->has_one() as $relName => $relClass) {
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$fieldName = $relName . 'ID';
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if($obj->$fieldName) {
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$href = Director::absoluteURL(self::$api_base . "$relClass/" . $obj->$fieldName);
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} else {
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$href = Director::absoluteURL(self::$api_base . "$className/$id/$relName");
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}
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$json .= "<$relName linktype=\"has_one\" href=\"$href\" id=\"{$obj->$fieldName}\" />\n";
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}
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foreach($obj->has_many() as $relName => $relClass) {
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$json .= "<$relName linktype=\"has_many\">\n";
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$items = $obj->$relName();
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foreach($items as $item) {
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//$href = Director::absoluteURL(self::$api_base . "$className/$id/$relName/$item->ID");
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$href = Director::absoluteURL(self::$api_base . "$relClass/$item->ID");
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$json .= "<$relClass href=\"$href\" id=\"{$item->ID}\" />\n";
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}
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$json .= "</$relName>\n";
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}
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foreach($obj->many_many() as $relName => $relClass) {
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$json .= "<$relName linktype=\"many_many\">\n";
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$items = $obj->$relName();
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foreach($items as $item) {
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//$href = Director::absoluteURL(self::$api_base . "$className/$id/$relName/$item->ID");
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$href = Director::absoluteURL(self::$api_base . "$relClass/$item->ID");
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$json .= "<$relClass href=\"$href\" id=\"{$item->ID}\" />\n";
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}
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$json .= "</$relName>\n";
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}
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$json .= "</$className>";
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return $json;
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}
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/**
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* Generate an XML representation of the given DataObject.
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*/
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protected function dataObjectAsJSON(DataObject $obj) {
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$className = $obj->class;
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$id = $obj->ID;
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$json = "{\n className : \"$className\",\n";
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foreach($obj->db() as $fieldName => $fieldType) {
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$jsonParts[] = "$fieldName : \"" . Convert::raw2js($obj->$fieldName) . "\"";
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}
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foreach($obj->has_one() as $relName => $relClass) {
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$fieldName = $relName . 'ID';
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if($obj->$fieldName) {
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$href = Director::absoluteURL(self::$api_base . "$relClass/" . $obj->$fieldName);
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} else {
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$href = Director::absoluteURL(self::$api_base . "$className/$id/$relName");
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}
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$jsonParts[] = "$relName : { className : \"$relClass\", href : \"$href\", id : \"{$obj->$fieldName}\" }";
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}
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foreach($obj->has_many() as $relName => $relClass) {
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$jsonInnerParts = array();
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$items = $obj->$relName();
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foreach($items as $item) {
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//$href = Director::absoluteURL(self::$api_base . "$className/$id/$relName/$item->ID");
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$href = Director::absoluteURL(self::$api_base . "$relClass/$item->ID");
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$jsonInnerParts[] = "{ className : \"$relClass\", href : \"$href\", id : \"{$obj->$fieldName}\" }";
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}
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$jsonParts[] = "$relName : [\n " . implode(",\n ", $jsonInnerParts) . " \n ]";
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}
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foreach($obj->many_many() as $relName => $relClass) {
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$jsonInnerParts = array();
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$items = $obj->$relName();
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foreach($items as $item) {
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//$href = Director::absoluteURL(self::$api_base . "$className/$id/$relName/$item->ID");
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$href = Director::absoluteURL(self::$api_base . "$relClass/$item->ID");
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$jsonInnerParts[] = " { className : \"$relClass\", href : \"$href\", id : \"{$obj->$fieldName}\" }";
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}
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$jsonParts[] = "$relName : [\n " . implode(",\n ", $jsonInnerParts) . "\n ]";
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}
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return "{\n " . implode(",\n ", $jsonParts) . "\n}";
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}
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/**
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* Handler for object delete
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*/
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protected function deleteHandler($className, $id) {
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if($id) {
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$obj = DataObject::get_by_id($className, $id);
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if($obj->stat('api_access') && $obj->canDelete()) {
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$obj->delete();
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} else {
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return $this->permissionFailure();
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}
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}
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}
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/**
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* Handler for object write
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*/
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protected function putHandler($className, $id) {
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return $this->permissionFailure();
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}
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/**
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* Handler for object append / method call
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*/
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protected function postHandler($className, $id) {
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return $this->permissionFailure();
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}
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protected function permissionFailure() {
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// return a 401
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$this->getResponse()->setStatusCode(403);
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return "You don't have access to this item through the API.";
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}
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protected function notFound() {
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// return a 404
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$this->getResponse()->setStatusCode(404);
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return "That object wasn't found";
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}
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} |