从 ruby​​ on rails 重定向到 angular 给 preflight 的响应是无效错误

Question

我有一个前端在 angular 4 中，后端在 rails 5 中的应用程序。

我已在我的应用程序中集成了一项支付服务，该服务将成功响应发布回给定的 URL。由于响应是 post 格式，所以我无法在 angular 上处理它。所以我将后端的 url 作为重定向 url。

现在我想重定向到提供支付服务响应的前端（角度）。

在使用 rails redirect_to 方法时，它给了我一个错误：

预检响应无效

但有时错误是

预检响应中的 Access-Control-Allow-Headers 不允许请求标头字段授权。

如何解决这个问题？

Answer 1

请参阅以下文档并了解如何避免飞行前请求。如果飞行前请求是必须的，那么它需要在服务器中使用正确的方法、来源和标头进行修复。

何时发送预检请求已在以下文档中明确记录。

https://developer.mozilla.org/en-US/docs/Web/HTTP/Access_control_CORS

In particular, a request is preflighted if any of the following conditions is true:

If the request uses any of the following methods:
PUT
DELETE
CONNECT
OPTIONS
TRACE
PATCH
Or if, apart from the headers set automatically by the user agent (for example, Connection, User-Agent, or any of the other header with a name defined in the Fetch spec as a “forbidden header name”), the request includes any headers other than those which the Fetch spec defines as being a “CORS-safelisted request-header”, which are the following:
Accept
Accept-Language
Content-Language
Content-Type (but note the additional requirements below)
Last-Event-ID
DPR
Downlink
Save-Data
Viewport-Width
Width
Or if the Content-Type header has a value other than the following:
application/x-www-form-urlencoded
multipart/form-data
text/plain
Or if one or more event listeners are registered on an XMLHttpRequestUpload object used in the request.
Or if a ReadableStream object is used in the request.