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Editing File: /home/maglabs/it/dev/tests/varnish/compression.vtc

varnishtest "Compression handling"

server s1 {
    # first request will be the probe, handle it and be on our way
    rxreq
    expect req.url == "/health_check.php"
    txresp

# the probe expects the connection to close
    close
    accept

# reply with a 200
    loop 4 {
        rxreq
        txresp -hdr "answer-to: POST"
    }

rxreq
    txresp -hdr "answer-to: GET"
} -start

# generate usable VCL pointing towards s1
# mostly, we replace the place-holders, but we also jack up the probe
# interval to avoid further interference
shell {
    # testdir is automatically set to the directory containing the present vtc
    sed \
        -e 's@\.interval = 5s;@.interval = 5m; .initial = 10;@' \
        -e 's@/\* {{ host }} \*/@${s1_addr}@' \
        -e 's@/\* {{ port }} \*/@${s1_port}@' \
        -e 's@/\* {{ ssl_offloaded_header }} \*/@unused@' \
        -e 's@/\* {{ grace_period }} \*/@0@' \
        ${testdir}/../../../app/code/Magento/PageCache/etc/varnish6.vcl > ${tmpdir}/output.vcl
}

# little trick here: we leverage the fact that subroutines with the same name
# are concatenated in the order they are seen. This allows us to tweak the
# backend response before the official VCL processes it, so we can tell
# client c1 which AE header was sent to the backend
varnish v1 -vcl {
    sub vcl_backend_response {
        set beresp.http.sent-accept-encoding = bereq.http.accept-encoding;
    }
    include "${tmpdir}/output.vcl";
}-start

# make sur ethe probe request fired
delay 1

client c1 {
    # Uncacheable (it's a POST), Varnish should send it verbatim to s1
    txreq -method "POST" -hdr "accept-encoding: something completely random"
    rxresp
    expect resp.http.sent-accept-encoding == "something completely random"

# cacheable GET
    txreq -hdr "accept-encoding: will be overridden"
    rxresp
    expect resp.http.sent-accept-encoding == "gzip"

# same thing, but the extension suggest an already compressed response
    txreq -url "/foo.tgz" -hdr "accept-encoding: will be overridden"
    rxresp
    expect resp.http.sent-accept-encoding == "gzip"
} -run

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