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;
});
$app->run();
但是,我无法让浏览器向我发送application/json
内容类型
总是发送text/html
?我做错了什么?
修改
好的,经过两个小时的撞击墙头后,我偶然发现了这个答案:
https://github.com/slimphp/Slim/issues/1535(在页面底部)
这解释了会发生什么,看来response
对象是不可变的
因此,如果您想在之后退货,则必须退回或重新分配
而
答案 0 :(得分:30)
所以,而不是:
if($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。
答案 1 :(得分:13)
对于V3,withJson()
可用。
所以你可以这样做:
return $response->withStatus(200)
->withJson(array($request->getAttribute("route")
->getArgument("someParameter")));
注意:确保您返回$response
,因为如果您忘记了,响应仍会显示但不会是application/json
。
答案 2 :(得分:2)
对于V3,根据Slim docs,最简单的方法是:
$data = array('name' => 'Rob', 'age' => 40);
return $response->withJson($data, 201);
这会自动将Content-Type设置为application/json;charset=utf-8
,并让您也设置HTTP状态代码(如果省略,则默认为200)。
答案 3 :(得分:0)
您还可以使用:
$response = $response->withHeader('Content-Type', 'application/json');
$response->write(json_encode($student));
return $response;
因为withHeader
返回新的响应对象。这样一来,您之间可以进行多次写入和编码。