[李景山php]每天laravel-20161023|Reponse.php

<?php

namespace Illuminate\Http;

use Exception;
use ArrayObject;
use JsonSerializable;
use Illuminate\Contracts\Support\Jsonable;
use Illuminate\Contracts\Support\Renderable;
use Symfony\Component\HttpFoundation\Response as BaseResponse;
// namespace about be use
class Response extends BaseResponse
{// a response about extends
use ResponseTrait;// use a trait

/**
* The original content of the response.
*
* @var mixed
*/
public $original;// The original content of the response.

/**
* The exception that triggered the error response (if applicable).
*
* @var \Exception
*/
public $exception;// The exception that triggered the error response (if applicable)

/**
* Set the content on the response.
*
* @param  mixed  $content
* @return $this
*/
public function setContent($content)
{// Set the content on the response.
$this->original = $content;// this content

// If the content is "JSONable" we will set the appropriate header and convert
// the content to JSON. This is useful when returning something like models
// from routes that will be automatically transformed to their JSON form.
if ($this->shouldBeJson($content)) {
$this->header('Content-Type', 'application/json');

$content = $this->morphToJson($content);
}// If the content is "JSONable" we will set the appropriate header and convert
// the content to JSON. This is useful when returning something like models
// from routes that will be automatically transformed to their JSON form

// If this content implements the "Renderable" interface then we will call the
// render method on the object so we will avoid any "__toString" exceptions
// that might be thrown and have their errors obscured by PHP's handling.
elseif ($content instanceof Renderable) {
$content = $content->render();
}// If this content implements the "Renderable" interface then we will call the
// render method on the object so we will avoid any "__toString" exceptions
// that might be thrown and have their errors obsured by PHP's handling.

return parent::setContent($content);// a parent:: setContent
}

/**
* Morph the given content into JSON.
*
* @param  mixed   $content
* @return string
*/
protected function morphToJson($content)
{
if ($content instanceof Jsonable) {
return $content->toJson();
}//content

return json_encode($content);//json_encode(content)
}//Morph the given content into JSON

/**
* Determine if the given content should be turned into JSON.
*
* @param  mixed  $content
* @return bool
*/
protected function shouldBeJson($content)
{//Determine if the given content should be turned into JSON.
return $content instanceof Jsonable ||
$content instanceof ArrayObject ||
$content instanceof JsonSerializable ||
is_array($content);
}// if can be morph to json ,then morph it.

/**
* Get the original response content.
*
* @return mixed
*/
public function getOriginalContent()
{
return $this->original;// big get
}//Get the original response content

/**
* Set the exception to attach to the response.
*
* @param  \Exception  $e
* @return $this
*/
public function withException(Exception $e)
{
$this->exception = $e;// set exception

return $this;// and return it self
}//Set the exception to attach to the response
}