November 2015
Intermediate to advanced
152 pages
2h 46m
English
Content preview from ASP.NET Web API Security EssentialsBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Setting the allowed request headers
Sometimes, browsers send a prerequest before sending an actual request in order to verify CORS. Such prerequests will use the HTTP OPTIONS method and the request will have the following access control request headers:
- Access-Control-Request-Method
- Access-Control-Request-Headers
The HTTP action method name that is applied on the actual request is supplied to Access-Control-Request-Method and the list of comma separated headers that is applied on the actual request is supplied to Access-Control-Request-Headers. The following sample request is one such prerequest:
OPTIONS http://localhost:53858/api/contacts HTTP/1.1 Host: localhost:53858 Accept: */* Origin: http://localhost:53870 Access-Control-Request-Method: PUT ...
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