Pete FreitagIf-Modified-Since and CFML Part III
Updated on December 06, 2023
By Pete Freitag
By Pete Freitag
Roger Benningfield pointed out to me that most clients use a value from a Last-Modified header as the value sent in the If-Modified-Since. So you will want to ensure that you are setting that header as well, if your planning on checking for If-Modified-Since. To add it simply use the cfheader tag:
<cfheader name="Last-Modified" value="#lastModifiedDate#">
Again make sure the date uses the correct format, use the GetHttpTimeString() function.
Roger also has a post on supporting conditional GETs with ColdFusion. I will post some info on ETags soon.
If-Modified-Since and CFML Part III was first published on February 22, 2005.
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