Generate an ETag with xbody

xbody_etag.vtc

varnishtest "Use xbody to generate an Etag"

server s1 {
	rxreq
	txresp -body "This is a test"
} -start

varnish v1 -vcl+backend {
	import crypto;
	import xbody;

	sub vcl_backend_response {
		xbody.regsub("test", "cat");
		xbody.hash_body(sha1);
	}

	sub vcl_deliver {
		set resp.http.ETag = {"""} + crypto.hex_encode(xbody.get_hash()) + {"""};
	}
} -start

client c1 {
	txreq
	rxresp
	expect resp.status == 200
	expect resp.http.ETag == {"2630a8082bcee40c4a9b341ac30c325378428c21"}
	expect resp.body == "This is a cat"

	txreq -hdr {If-None-Match: "2630a8082bcee40c4a9b341ac30c325378428c21"}
	rxresp
	expect resp.status == 304
	expect resp.bodylen == 0
} -run