Slim - 如何使用“Content-Type: application/json”标头发送响应?

2022-08-30 16:04:26

我有这个简单的REST API,在Slim中完成,

<?php

require '../vendor/autoload.php';

function getDB()
{
    $dsn = 'sqlite:/home/branchito/personal-projects/slim3-REST/database.sqlite3';

    $options = array(
        PDO::ATTR_PERSISTENT => true,
        PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION
    );
    try {

        $dbh = new PDO($dsn);

        foreach ($options as $k => $v)
            $dbh->setAttribute($k, $v);

        return $dbh;
    }
    catch (PDOException $e) {
        $error = $e->getMessage();
    }
}

$app = new \Slim\App();

$app->get('/', function($request, $response) {
    $response->write('Bienvenidos a Slim 3 API');
    return $response;
});

$app->get('/getScore/{id:\d+}', function($request, $response, $args) {

    try {
        $db = getDB();
        $stmt = $db->prepare("SELECT * FROM students
            WHERE student_id = :id
            ");

        $stmt->bindParam(':id', $args['id'], PDO::PARAM_INT);
        $stmt->execute();

        $student = $stmt->fetch(PDO::FETCH_OBJ);

        if($student) {
            $response->withHeader('Content-Type', 'application/json');
            $response->write(json_encode($student));

        } else { throw new PDOException('No records found');}

    } catch (PDOException $e) {

        $response->withStatus(404);
        $err =  '{"error": {"text": "'.$e->getMessage().'"}}';
        $response->write($err);
    }
    return $response;
});

$app->run();

但是,我无法让浏览器向我发送内容类型,它总是发送?我做错了什么?application/jsontext/html

编辑:

好吧,在将头撞到墙上两个小时后,我偶然发现了这个答案:

https://github.com/slimphp/Slim/issues/1535(在页面底部)解释了发生了什么,看起来对象是不可变的,因此,如果您想在一段时间后返回它,则必须返回或重新分配它。response


答案 1

所以,而不是这个:

if($student) {
            $response->withHeader('Content-Type', 'application/json');
            $response->write(json_encode($student));
            return $response;

        } else { throw new PDOException('No records found');}

这样做:

if($student) {
    return $response->withStatus(200)
        ->withHeader('Content-Type', 'application/json')
        ->write(json_encode($student));

} else { throw new PDOException('No records found');}

一切都很好,很好。


答案 2

对于 V3,可以使用 withJson()。

所以你可以做这样的事情:

return $response->withStatus(200)
                ->withJson(array($request->getAttribute("route")
                ->getArgument("someParameter")));

注意:确保返回 ,因为如果您忘记了,响应仍将出来,但不会是 。$responseapplication/json


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