我正在尝试建立一个角度温泉,但有问题的cors。我的api在rails上运行。
GET请求没有问题,但POST、PUT、DELETE不起作用。传达的信息是:
XMLHttpRequest cannot load http://localhost:3001/api/resources. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:8888' is therefore not allowed access.
我试着运行这段代码,但它显示了以下错误
'ConnectionError: Failed to connect to LAPTOP-VNS3VHIC:1433 - self signed certificate
at C:\Users\dtvin\OneDrive\Máy tính\mssql\node_modules\mssql\lib\tedious\connection-pool.js:70:17
at Connection.onConnect (C:\Users\dtvin\OneDrive\Máy tính\mssql\node_modules\tedious
我试着破译一条关于等级的错误信息。在Haskell中,我可以以一种简单的方式编写以下流函数twist:
data Stream a = a :> Stream a
twist :: (a -> (b , (Either a c))) -> (c -> (b , (Either a c))) -> (Either a c) -> Stream b
twist lt rt (Left a) = b :> twist lt rt ac
where
(b , ac) = lt a
twist lt rt (Right c) = b :>