├── .travis.yml
├── README.md
├── runtests.sh
├── v4
    ├── stale-if-error.vcl
    └── xff.vcl
└── v5
    ├── stale-if-error.vcl
    └── xff.vcl


/.travis.yml:
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 1 | dist: trusty
 2 | sudo: required
 3 | language: generic
 4 | env:
 5 |   - VER=4.1
 6 |   - VER=5.0
 7 |   - VER=5.1
 8 | before_install:
 9 |   - curl -s https://packagecloud.io/install/repositories/varnishcache/varnish${VER/./}/script.deb.sh | sudo bash
10 |   - sudo apt-get install varnish=${VER}.*
11 | script:
12 |   - ./runtests.sh $VER
13 | 


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/README.md:
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 1 | vcl-snippets
 2 | ============
 3 | 
 4 | [![Build Status](https://travis-ci.org/fgsch/vcl-snippets.svg?branch=master)](https://travis-ci.org/fgsch/vcl-snippets)
 5 | 
 6 | A series of snippets for Varnish Cache divided by major version.
 7 | 
 8 | How to use
 9 | ----------
10 | 
11 | Download the file with the required functionality and include it in the configuration using:
12 | 
13 | ```
14 | include "<path/to/file>";
15 | ```
16 | 
17 | Alternatively copy and paste the code into the configuration.
18 | 
19 | Please note that Varnish will concatenate the subroutines as they appear in the file so the order *does* matter.
20 | 


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/runtests.sh:
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 1 | #!/bin/sh
 2 | #
 3 | # Run every snippet through varnishd
 4 | 
 5 | t=$(mktemp)
 6 | trap 'rm -f $t' 0
 7 | for f in $(echo v${1%%.?}/*.vcl); do
 8 | 	cat >$t <<_EOF
 9 | vcl 4.0;
10 | backend default { .host = "127.0.0.1"; }
11 | include "$(pwd)/$f";
12 | _EOF
13 | 	echo -n "Snippet $f "
14 | 	varnishd -n $(pwd) -C -f $t 2>/dev/null
15 | 	if [ $? -eq 0 ]; then
16 | 		echo "passed"
17 | 	else
18 | 		echo "FAILED"
19 | 		status=2
20 | 	fi
21 | done
22 | exit $status
23 | 


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/v4/stale-if-error.vcl:
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 1 | sub try_stale_if_error {
 2 | 	if (obj.ttl < 0s && obj.ttl + obj.grace > 0s) {
 3 | 		if (req.restarts == 0) {
 4 | 			set req.http.sie-enabled = true;
 5 | 			return (fetch);
 6 | 		} else {
 7 | 			set req.http.sie-abandon = true;
 8 | 			return (deliver);
 9 | 		}
10 | 	}
11 | }
12 | 
13 | sub vcl_backend_fetch {
14 | 	if (bereq.http.sie-abandon) {
15 | 		return (abandon);
16 | 	}
17 | }
18 | 
19 | sub vcl_backend_response {
20 | 	if (beresp.status > 400 && bereq.http.sie-enabled) {
21 | 		return (abandon);
22 | 	}
23 | }
24 | 
25 | sub vcl_backend_error {
26 | 	if (bereq.http.sie-enabled) {
27 | 		return (abandon);
28 | 	}
29 | }
30 | 
31 | sub vcl_synth {
32 | 	if (resp.status == 503 && req.http.sie-enabled) {
33 | 		unset req.http.sie-enabled;
34 | 		return (restart);
35 | 	}
36 | }
37 | 
38 | sub vcl_hit {
39 | 	call try_stale_if_error;
40 | }
41 | 


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/v4/xff.vcl:
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1 | # Remove everything but the first ip address from X-Forwarded-For.
2 | # This normally means removing the Varnish ip address.
3 | sub vcl_recv {
4 | 	set req.http.X-Forwarded-For =
5 | 	    regsub(req.http.X-Forwarded-For, ",.*", "");
6 | }
7 | 


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/v5/stale-if-error.vcl:
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 1 | sub try_stale_if_error {
 2 | 	if (obj.ttl < 0s && obj.ttl + obj.grace > 0s) {
 3 | 		if (req.restarts == 0) {
 4 | 			set req.http.sie-enabled = true;
 5 | 			return (miss);
 6 | 		} else {
 7 | 			set req.http.sie-abandon = true;
 8 | 			return (deliver);
 9 | 		}
10 | 	}
11 | }
12 | 
13 | sub vcl_backend_fetch {
14 | 	if (bereq.http.sie-abandon) {
15 | 		return (abandon);
16 | 	}
17 | }
18 | 
19 | sub vcl_backend_response {
20 | 	if (beresp.status > 400 && bereq.http.sie-enabled) {
21 | 		return (abandon);
22 | 	}
23 | }
24 | 
25 | sub vcl_backend_error {
26 | 	if (bereq.http.sie-enabled) {
27 | 		return (abandon);
28 | 	}
29 | }
30 | 
31 | sub vcl_synth {
32 | 	if (resp.status == 503 && req.http.sie-enabled) {
33 | 		unset req.http.sie-enabled;
34 | 		return (restart);
35 | 	}
36 | }
37 | 
38 | sub vcl_hit {
39 | 	call try_stale_if_error;
40 | }
41 | 


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/v5/xff.vcl:
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1 | ../v4/xff.vcl


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