我正在使用Laravel 5构建REST API。
在Laravel 5中,您可以继承App\Http\Requests\Request
以定义在处理特定路由之前必须满足的验证规则。例如:
<?php
namespace App\Http\Requests;
use App\Http\Requests\Request;
class BookStoreRequest extends Request {
public function authorize() {
return true;
}
public function rules() {
return [
'title' => 'required',
'author_id' => 'required'
];
}
}
如果客户端通过AJAX请求加载相应的路由,并且BookStoreRequest
发现请求不满足规则,它将自动将错误作为JSON对象返回。例如:
{
"title": [
"The title field is required."
]
}
但是,Request::rules()
方法只能验证输入 - 即使输入有效,在请求已被接受并传递给控制器之后也可能出现其他类型的错误。例如,让我们说控制器出于某种原因需要将新书信息写入文件 - 但是文件无法打开:
<?php
namespace App\Http\Controllers;
use Illuminate\Http\Request;
use App\Http\Requests;
use App\Http\Controllers\Controller;
use App\Http\Requests\BookCreateRequest;
class BookController extends Controller {
public function store( BookStoreRequest $request ) {
$file = fopen( '/path/to/some/file.txt', 'a' );
// test to make sure we got a good file handle
if ( false === $file ) {
// HOW CAN I RETURN AN ERROR FROM HERE?
}
fwrite( $file, 'book info goes here' );
fclose( $file );
// inform the browser of success
return response()->json( true );
}
}
显然,我可以die()
,但这非常难看。我宁愿以与验证错误相同的格式返回我的错误消息。像这样:
{
"myErrorKey": [
"A filesystem error occurred on the server. Please contact your administrator."
]
}
我可以构建自己的JSON对象并返回它 - 但是Laravel肯定会支持它。
最好/最干净的方法是什么?或者是否有更好的方法从Laravel REST API返回运行时(而不是验证时间)错误?
答案 0 :(得分:19)
您可以在json响应中设置状态代码,如下所示:
return Response::json(['error' => 'Error msg'], 404); // Status code here
或者只是使用帮助函数:
return response()->json(['error' => 'Error msg'], 404); // Status code here
答案 1 :(得分:6)
你可以通过多种方式实现这一目标。
首先,您可以通过提供状态代码来使用简单的response()->json()
:
return response()->json( /** response **/, 401 );
或者,以更复杂的方式确保每个错误都是json响应,您可以设置异常处理程序来捕获特殊异常并返回json。
打开App\Exceptions\Handler
并执行以下操作:
class Handler extends ExceptionHandler
{
/**
* A list of the exception types that should not be reported.
*
* @var array
*/
protected $dontReport = [
HttpException::class,
HttpResponseException::class,
ModelNotFoundException::class,
NotFoundHttpException::class,
// Don't report MyCustomException, it's only for returning son errors.
MyCustomException::class
];
public function render($request, Exception $e)
{
// This is a generic response. You can the check the logs for the exceptions
$code = 500;
$data = [
"error" => "We couldn't hadle this request. Please contact support."
];
if($e instanceof MyCustomException) {
$code = $e->getStatusCode();
$data = $e->getData();
}
return response()->json($data, $code);
}
}
这将返回应用程序中抛出的任何异常的json。
现在,我们创建MyCustomException
,例如在app / Exceptions:
class MyCustomException extends Exception {
protected $data;
protected $code;
public static function error($data, $code = 500)
{
$e = new self;
$e->setData($data);
$e->setStatusCode($code);
throw $e;
}
public function setStatusCode($code)
{
$this->code = $code;
}
public function setData($data)
{
$this->data = $data;
}
public function getStatusCode()
{
return $this->code;
}
public function getData()
{
return $this->data;
}
}
我们现在可以使用MyCustomException
或任何扩展MyCustomException
的异常来返回json错误。
public function store( BookStoreRequest $request ) {
$file = fopen( '/path/to/some/file.txt', 'a' );
// test to make sure we got a good file handle
if ( false === $file ) {
MyCustomException::error(['error' => 'could not open the file, check permissions.'], 403);
}
fwrite( $file, 'book info goes here' );
fclose( $file );
// inform the browser of success
return response()->json( true );
}
现在,不仅通过MyCustomException
抛出的异常将返回json错误,而且一般会抛出任何其他异常。
答案 2 :(得分:0)
一个简单的方法是在控制器中使用 abort()
方法。这将返回一个错误,该错误将被 ajax error:function(){}
public function boost_reputation(Request $request){
$page_owner = User::where('id', $request->page_owner_id)->first();
// user needs to login to boost reputation
if(!Auth::user()){
toast('Sorry, you need to login first.','info');
abort();
}
// page owner cannot boost his own reputation
if(Auth::user() == $page_owner){
toast("Sorry, you can't boost your own reputation.",'info');
abort();
}
}
$('.reputation-btn').on('click',function(event){
var btn = this;
var route = "{{ route('boost_reputation') }}";
var csrf_token = '{{ csrf_token() }}';
var id = '{{ $page_owner->id }}';
$.ajax({
method: 'POST',
url: route,
data: {page_owner_id:id, _token:csrf_token},
success:function(data) {
...your success code
},
error: function () {
...your error code
}
});
});