$ http DELETE变成OPTIONS AngularJS

Question

当我使用put或delete时,它变成OPTIONS.我正在为我的服务器框架使用expressjs.

客户:

$http({
    method: 'DELETE',
    url: HTTP_URL + '/update/account',
    params: { mail: mail }
});

服务器:

app.all('*', function(req, res, next) {
res.header("Access-Control-Allow-Origin", "*");
res.header("Access-Control-Allow-Credentials", true);
res.header('Access-Control-Allow-Methods', 'POST, GET, PUT, DELETE');
res.header("Access-Control-Allow-Headers",
    'Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept');
next();
});

Answer 1

为 CORS 发出预检 HTTP OPTIONS 请求不是很正常吗？您可能需要在访问控制允许方法列表中允许选项...