1/1/2023 0 Comments Preflight definition![]() ![]() Use the * wildcard with care in policy settings. This element contains header elements specifying names of the headers that will be accessible by the client.Īt least one header element is required in allowed-headers or in expose-headers if that section is present. This element contains header elements specifying names of the headers that can be included in the request. If this section isn't present, GET and POST are supported.Īt least one method element is required if the allowed-methods section is present. Contains method elements that specify the supported HTTP verbs. This element is required if methods other than GET or POST are allowed. If the port is omitted in a URI, port 80 is used for HTTP and port 443 is used for HTTPS. The URI must include a scheme, host, and port. The value can be either * to allow all origins, or a URI that specifies a single origin. allowed-origins can contain either a single origin element that specifies * to allow any origin, or one or more origin elements that contain a URI. Ĭontains origin elements that describe the allowed origins for cross-domain requests. To support custom headers and other HTTP verbs, use the allowed-methods and allowed-headers sections as shown in the following example. #Preflight definition how toThis example demonstrates how to support preflight requests, such as those with custom headers or methods other than GET and POST. This response is expected when terminate-unmatched-request is set to its default value of true and an incoming request has an Origin header that doesn’t match an allowed origin configured in the cors policy.
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