Laravel 如何知道 Request::wantsJson 是对 JSON 的请求?

How does Laravel know Request::wantsJson is a request for JSON?(Laravel 如何知道 Request::wantsJson 是对 JSON 的请求?)

问题描述

我注意到 Laravel 有一个简洁的方法 Request::wantsJson - 我假设当我发出请求，我可以传递信息来请求 JSON 响应，但我该怎么做，Laravel 使用什么标准来检测请求是否请求 JSON?

I noticed that Laravel has a neat method Request::wantsJson - I assume when I make the request I can pass information to request a JSON response, but how do I do this, and what criteria does Laravel use to detect whether a request asks for JSON ?

推荐答案

它使用客户端发送的 Accept 标头来确定是否需要 JSON 响应.

It uses the Accept header sent by the client to determine if it wants a JSON response.

让我们看看代码:p>

Let's look at the code :

public function wantsJson() {
    $acceptable = $this->getAcceptableContentTypes();
    return isset($acceptable[0]) && $acceptable[0] == 'application/json';
}

因此，如果客户端向 application/json 发送具有第一个可接受的内容类型的请求，则该方法将返回 true.

So if the client sends a request with the first acceptable content type to application/json then the method will return true.

至于如何请求 JSON，您应该相应地设置 Accept 标头，这取决于您使用什么库来查询您的路由，这里有一些我知道的库示例:

As for how to request JSON, you should set the Accept header accordingly, it depends on what library you use to query your route, here are some examples with libraries I know :

Guzzle (PHP):

GuzzleHttpget("http://laravel/route", ["headers" => ["Accept" => "application/json"]]);

cURL (PHP):

$curl = curl_init();
curl_setopt_array($curl, [CURLOPT_URL => "http://laravel/route", CURLOPT_HTTPHEADER => ["Accept" => "application/json"], CURLOPT_RETURNTRANSFER => true]);
curl_exec($curl);

请求(Python):

requests.get("http://laravel/route", headers={"Accept":"application/json"})

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