问题
Is there any way to have one OPTIONS request for all the subsequent POST requests.
The application communicates with the server by means of POST requests whenever required.There are many unrelated POST requests happening and for each POST request one OPTIONS is triggered to ensure CORS.Can we have one OPTIONS for all these POST requests.
回答1:
Looking here, I believe you can accomplish this by setting the "Access-Control-Max-Age" header for an arbitrarily long duration of time. This field determines how long the results from the pre-flight OPTIONS request are cached for before an additional OPTIONS request needs to be sent, so by extending it you can limit how often OPTIONS requests are sent.
来源：https://stackoverflow.com/questions/31517737/one-options-for-all-post-requests