VCL for http://stackoverflow.com/questions/23643233/how-do-i-disable-transfer-encoding-chunked-encoding-in-varnish

default.vcl

vcl 4.0;
import directors;

probe health {
	.url = "/ping/";
	.expected_response = 200;
	.timeout = 1s;
	.interval = 1s;
}

backend instance1 {
	.host = "10.100.18.112";
	.port = "80";
	.probe = health;
}
backend instance2 {
	.host = "10.100.19.233";
	.port = "80";
	.probe = health;
}
sub vcl_init {
	new PhotoServe = directors.round_robin();
	PhotoServe.add_backend(instance1);
	PhotoServe.add_backend(instance2);
}

sub vcl_recv {
	if(req.url ~ "\.(jpg|gif|png|mp4)$") {
		set req.backend_hint = PhotoServe.backend();
		return(hash);
	}

	if(req.url ~ ".smil/") {
		set req.backend_hint = PhotoServe.backend();
		return(hash);
	}
}

sub vcl_backend_response {
	if(beresp.http.Content-Type ~ "video") {
		set beresp.do_stream = true;
		set beresp.do_gzip = false;
		//set resp.http.Content-Length = beresp.http.Content-Length;
	}
	if(beresp.http.Edge-Control == "no-store") {
		set beresp.uncacheable = true;
		set beresp.ttl = 60s;
		set beresp.http.Smug-Cacheable = "No";
		return(deliver);
	}
}