[Varnish] #1766: Provide an access to the request stack for ESI subrequests
Varnish
varnish-bugs at varnish-cache.org
Mon Jul 20 12:49:37 CEST 2015
#1766: Provide an access to the request stack for ESI subrequests
---------------------------------+-------------------------
Reporter: lisachenko.it@… | Type: enhancement
Status: new | Priority: normal
Milestone: | Component: varnishd
Version: 4.0.3 | Severity: normal
Keywords: ESI, request, stack |
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In some cases, this feature can be very useful with combination of
req.esi_level variable.
For example, to detect Last-Modified date for a page with ESI blocks (we
just update the main response header within sub-responses).
Here is an example:
{{{
req.stack <== Stack of requests and subrequests
req.stack[0] <== Always first, main request
req.stack[req.esi_level-1] <== Parent request for the current ESI sub-
request.
resp.stack <== Stack of responses
resp.stack[0] <== Main response
if (req.esi_level > 0 && (!resp.stack[0].http.Last-Modified ||
resp.stack[0].http.Last-Modified < resp.http.Last-Modified)) {
// Update our main response headers with information about current
response
set resp.stack[0].http.Last-Modified = resp.http.Last-Modified;
}
}}}
--
Ticket URL: <https://www.varnish-cache.org/trac/ticket/1766>
Varnish <https://varnish-cache.org/>
The Varnish HTTP Accelerator
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