错误：Access-Control-Allow-Headers 不允许 Content-Type

Question

当尝试发送 ajax 请求时，我在 Chrome 中收到此错误：

Content-Type is not allowed by Access-Control-Allow-Headers

在 Firefox 中一切正常。

谁能帮我解决这个问题？

Answer 1

我解决了向 Apache Web Server 虚拟主机配置添加以下设置的问题

Header set Access-Control-Allow-Origin "*"
Header set Access-Control-Allow-Headers "Origin, X-Requested-With, Content-Type, Accept"

Answer 2

PHP的解决方案：（

header('Access-Control-Allow-Origin: *');
header('Access-Control-Allow-Methods: POST,GET,OPTIONS');
header('Access-Control-Allow-Headers: Origin, X-Requested-With, Content-Type, Accept');

需要在任何其他内容之前发送）

Answer 3

在node.js中设置CORS（跨站点HTTP请求）。对我来说，它看起来像下面这样：

app.use('/api', function(req, res, next) {
  res.header('Access-Control-Allow-Origin', '*');
  res.header('Access-Control-Allow-Headers', 'X-Requested-With, Content-Type');
  next();
});

Answer 4

对于 nginx

location / {
    proxy_pass http://localhost:59100;
    proxy_http_version 1.1;
    # proxy_set_header Upgrade $http_upgrade;
    # proxy_set_header Connection 'upgrade';
    proxy_set_header Host $host;

    # Simple requests
    if ($request_method ~* "(GET|POST)") {
      add_header "Access-Control-Allow-Origin"  *;
    }

    # Preflighted requests
    if ($request_method = OPTIONS ) {
      add_header "Access-Control-Allow-Origin"  *;
      add_header "Access-Control-Allow-Methods" "GET, POST, OPTIONS, HEAD";
      add_header "Access-Control-Allow-Headers" "Authorization, Origin, X-Requested-With, Content-Type, Accept";
    }

    # proxy_cache_bypass $http_upgrade;
    # add_header Access-Control-Allow-Origin *;
    # add_header Access-Control-Allow-Headers Content-Type;
}

参见
https://distinctplace.com/2017/04 /17/nginx-access-control-allow-origin-cors/

Answer 5

我遇到了同样的问题，我通过添加以下标头解决了它：
访问控制允许标头：内容类型

Answer 6

对于使用 PHP 的我来说，即使我仅设置此标头设置，本地也可以工作：

header('Access-Control-Allow-Headers: Origin, X-Requested-With, Content-Type, Accept');