php Laravel 如何知道 Request::wantsJson 是对 JSON 的请求？
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How does Laravel know Request::wantsJson is a request for JSON?
提问by Martyn
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 ?
我注意到 Laravel 有一个简洁的方法Request::wantsJson- 我假设当我发出请求时，我可以传递信息来请求 JSON 响应，但是我该怎么做，Laravel 使用什么标准来检测请求是否要求 JSON ？
回答by
It uses the Acceptheader sent by the client to determine if it wants a JSON response.
它使用Accept客户端发送的标头来确定它是否需要 JSON 响应。
Let's look at the code:
让我们看一下代码：
public function wantsJson() {
$acceptable = $this->getAcceptableContentTypes();
return isset($acceptable[0]) && $acceptable[0] == 'application/json';
}
So if the client sends a request with the first acceptable content type to application/jsonthen the method will return true.
因此，如果客户端向第一个可接受的内容类型发送请求，application/json则该方法将返回 true。
As for how to request JSON, you should set the Acceptheader accordingly, it depends on what library you use to query your route, here are some examples with libraries I know :
至于如何请求 JSON，您应该相应地设置Accept标头，这取决于您用于查询路线的库，以下是我知道的一些库示例：
Guzzle(PHP):
狂饮（PHP）：
GuzzleHttp\get("http://laravel/route", ["headers" => ["Accept" => "application/json"]]);
cURL(PHP) :
卷曲(PHP) :
$curl = curl_init();
curl_setopt_array($curl, [CURLOPT_URL => "http://laravel/route", CURLOPT_HTTPHEADER => ["Accept" => "application/json"], CURLOPT_RETURNTRANSFER => true]);
curl_exec($curl);
Requests(Python) :
请求（Python）：
requests.get("http://laravel/route", headers={"Accept":"application/json"})
