About
An HTTP conditional request is a request that contains an IF headers
Example
If-Modified-Since: Sat, 07 Feb 2015 16:44:03 GMT
If-None-Match: "e026b5aa0e4be8d990f093176b3dcb7f"
Note that you can get one or both from the usger agent (browser)
Usage
Specification
- rfc7232, R. Fielding, J. Reschke. IETF.