Yii2 ?配置request组件解析 json数据

‘components‘ =>[ ???‘request‘ => [ ???????‘parsers‘ => [ ???????????‘application/json‘ => ‘yii\web\JsonParser‘, ???????], ???],],

 public function post($name = null, $defaultValue = null) ???{ ???????if ($name === null) { ???????????return $this->getBodyParams(); ???????} else { ???????????????????return $this->getBodyParam($name, $defaultValue); ???????}+6

/** ????* Returns the request parameters given in the request body. ????* ????* Request parameters are determined using the parsers configured in [[parsers]] property. ????* If no parsers are configured for the current [[contentType]] it uses the PHP function `mb_parse_str()` ????* to parse the [[rawBody|request body]]. ????* @return array the request parameters given in the request body. ????* @throws \yii\base\InvalidConfigException if a registered parser does not implement the [[RequestParserInterface]]. ????* @see getMethod() ????* @see getBodyParam() ????* @see setBodyParams() ????*/ ???public function getBodyParams() ???{ ???????if ($this->_bodyParams === null) { ???????????if (isset($_POST[$this->methodParam])) {
　　　　　　　　　　//post提交时，存在以$this->methodParam（默认是_method 名称）命名的参数时，直接把$_POST内容赋值给$this_bodyParams，同时删除$this->methodParam内容 ???????????????$this->_bodyParams = $_POST; ???????????????unset($this->_bodyParams[$this->methodParam]); ???????????????return $this->_bodyParams; ???????????}　　　　　　　//获取Content-Type　　　 ???????????$rawContentType = $this->getContentType(); ???????????if (($pos = strpos($rawContentType, ‘;‘)) !== false) { ???????????????// e.g. application/json; charset=UTF-8 ???????????????$contentType = substr($rawContentType, 0, $pos); ???????????} else { ???????????????$contentType = $rawContentType; ???????????} ???????????if (isset($this->parsers[$contentType])) {
　　　　　　　　　　//在request组件中存在相关$contentType类型配置时，创建该解析器，解析$this->getRawBody() 获取的内容
　　　　　　　　　　// $this->getRawBody() 是通过 file_get_contents(‘php://input‘)获取内容

$parser = Yii::createObject($this->parsers[$contentType]); ???????????????if (!($parser instanceof RequestParserInterface)) { ???????????????????throw new InvalidConfigException("The ‘$contentType‘ request parser is invalid. It must implement the yii\\web\\RequestParserInterface."); ???????????????} ???????????????$this->_bodyParams = $parser->parse($this->getRawBody(), $rawContentType); ???????????} elseif (isset($this->parsers[‘*‘])) { ???????????????$parser = Yii::createObject($this->parsers[‘*‘]); ???????????????if (!($parser instanceof RequestParserInterface)) { ???????????????????throw new InvalidConfigException("The fallback request parser is invalid. It must implement the yii\\web\\RequestParserInterface."); ???????????????} ???????????????$this->_bodyParams = $parser->parse($this->getRawBody(), $rawContentType); ???????????} elseif ($this->getMethod() === ‘POST‘) { ???????????????// PHP has already parsed the body so we have all params in $_POST ???????????????$this->_bodyParams = $_POST; ???????????} else { ???????????????$this->_bodyParams = []; ???????????????mb_parse_str($this->getRawBody(), $this->_bodyParams); ???????????} ???????} ???????return $this->_bodyParams; ???}

 /** ????* Parses a HTTP request body. ????* @param string $rawBody the raw HTTP request body. ????* @param string $contentType the content type specified for the request body. ????* @return array parameters parsed from the request body ????* @throws BadRequestHttpException if the body contains invalid json and [[throwException]] is `true`. ????*/ ???public function parse($rawBody, $contentType) ???{ ???????try { ???????????$parameters = Json::decode($rawBody, $this->asArray); ???????????return $parameters === null ? [] : $parameters; ???????} catch (InvalidParamException $e) { ???????????if ($this->throwException) { ???????????????throw new BadRequestHttpException(‘Invalid JSON data in request body: ‘ . $e->getMessage()); ???????????} ???????????return []; ???????} ???}