examples/varnish-4.vcl

   1 # Example VCL for Varnish 4.0 with public-inbox WWW code
   2 # This is based on what shipped for 3.x a long time ago (I think)
   3 # and I'm hardly an expert in VCL (nor should we expect anybody
   4 # who maintains a public-inbox HTTP interface to be).
   5 #
   6 # It seems to work for providing some protection from traffic
   7 # bursts; but perhaps the public-inbox WWW interface can someday
   8 # provide enough out-of-the-box performance that configuration
   9 # of an extra component is pointless.
  10
  11 vcl 4.0;
  12 backend default {
  13         .host = "127.0.0.1";
  14         .port = "280";
  15 }
  16
  17 sub vcl_recv {
  18         if (req.restarts == 0) {
  19                 if (req.http.x-forwarded-for) {
  20                         set req.http.X-Forwarded-For =
  21                         req.http.X-Forwarded-For + ", " + client.ip;
  22                 } else {
  23                         set req.http.X-Forwarded-For = client.ip;
  24                 }
  25         }
  26         if (req.method != "GET" &&
  27                         req.method != "HEAD" &&
  28                         req.method != "PUT" &&
  29                         req.method != "POST" &&
  30                         req.method != "TRACE" &&
  31                         req.method != "OPTIONS" &&
  32                         req.method != "DELETE") {
  33                 /* Non-RFC2616 or CONNECT which is weird. */
  34                 return (pipe);
  35         }
  36         if (req.method != "GET" && req.method != "HEAD") {
  37                 /* We only deal with GET and HEAD by default */
  38                 return (pass);
  39         }
  40         if (req.http.Authorization || req.http.Cookie) {
  41                 /* Not cacheable by default */
  42                 return (pass);
  43         }
  44         return (hash);
  45 }
  46
  47 sub vcl_hash {
  48         hash_data(req.url);
  49         if (req.http.host) {
  50                 hash_data(req.http.host);
  51         } else {
  52                 hash_data(server.ip);
  53         }
  54         if (req.http.X-Forwarded-Proto) {
  55                 hash_data(req.http.X-Forwarded-Proto);
  56         }
  57         return (lookup);
  58 }
  59
  60 sub vcl_backend_response {
  61         set beresp.grace = 60s;
  62         set beresp.do_stream = true;
  63         if (beresp.ttl <= 0s ||
  64                 beresp.http.Set-Cookie ||
  65                 beresp.http.Vary == "*") {
  66                 /* Mark as "Hit-For-Pass" for the next 2 minutes */
  67                 set beresp.ttl = 120 s;
  68                 set beresp.uncacheable = true;
  69                 return (deliver);
  70         } else {
  71                 set beresp.ttl = 10s;
  72         }
  73         return (deliver);
  74 }