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Etags implementation in the API
vamsyvaraganti edited this page Dec 28, 2017
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An entity tag (ETag) is an HTTP header used for Web cache validation and conditional requests from browsers for resources.
The Open Event API accepts two types of headers:
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If-Match: Ensures the response is returned only if the ETag of the current response matches any of the ETags in the If-Match header. If none of the given ETags match, a 412 Precondition Failed status code will be returned. -
If-None-Match: Ensures the response is returned only if the ETag of the current response does not match any of the ETags in the If-Match header. If the given ETags matches, a 304 Not Modified status code will be returned.
Both of the above headers accept a comma separated list of Etags.