Hi,
being rather new to using varnish, I don't want to file this as a bug
right away.
First of all, my .vcl in use:
===
backend www {
.host = "127.0.0.1";
.port = "4567";
}
sub vcl_fetch {
esi;
}
===
I have two problems. I have an include-element of the following form:
===
<!-- head and everything -->
<body>
<esi:include src="/include" alt="/alt" onerror="continue" />
</body>
</html>
===
First, I (accidentally) forged "/include" to return 404 and no body,
which leads to the following output:
===
<!-- head and everything -->
<body>
===
So, the ESI processing stops in the moment that the include is empty
string.
The scenario second problem is as follows:
1. "/include" returns 404 and the string "some text" as body.
2. "/alt" returns 500 and the string "some other text" as body.
Reading the (rather unspecific) ESI Language Specification, I expect
that the include-element is deleted silently, because:
1. "src" "is not found".
2. "ESI can fetch neither the src nor the alt"
So, I would expect:
===
<!-- head and everything -->
<body>
</body>
</html>
===
But, much to my surprise, the return is:
===
<!-- head and everything -->
<body>
some text
</body>
</html>
===
It also happens if "/include" returns 500. I checked the headers, they
are okay. It happens both with 2.0.2 and trunk, OS is Gentoo Linux and
OS X.
So, I am beginning to wonder on how esi:include is implemented in
varnish or what I am doing wrong. Because - granted - the ESI
specification could be interpreted to include the element without
giving much thought on what the returned entity actually represents.
Then this would be the correct behaviour, as the backend is obviously
responding.
To potentially save you some work, i'll include my demo script (in
ruby/sinatra) and the vcl below.
Thank you for your time,
Florian Gilcher
--
esi.rb:
===
#!/usr/bin/env ruby
# to use this, you need ruby, configured with zlib and rubygems
installed
# to install sinatra, run "gem install sinatra"
require 'rubygems'
require 'sinatra'
get '/include' do
response.status = 500
"some text"
end
get '/alt' do
response.status = 500
"some other text"
end
get '/' do
'<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd";>
<html>
<head>
<meta http-equiv="Content-type" content="text/html;
charset=utf-8">
<title>Page Title</title>
</head>
<body>
<esi:include src="/include" alt="/alt" onerror="continue" />
</body>
</html>'
end
===
esi.vcl
===
backend www {
.host = "127.0.0.1";
.port = "4567";
}
sub vcl_fetch {
esi;
}
===
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