symfony/symfony — comment on commit f7c5bf1db2d18dfb480ac4dc1e6b1be160952edf
File:  line 0
By innocead:

1. This code work when esi tags convert into html without Varnish and esi is on in config. No problems should be.
2. Content-Length header is also adding before that code. In Store->write metod. And that is why symfony send wrong Content-Length header when using ESI tags without Varnish.