June 1999
Intermediate to advanced
540 pages
21h 39m
English
If-Range
If-Range:
entity_tag
|
date
A conditional requesting only the portion of the entity that
is missing if it has not been changed, and the entire entity if
it has. Must be used in conjunction with a Range header.
Either an entity tag or a date can identify the
partial entity already received; see the Date
header for information on the format for dates.
Read now
Unlock full access