Fastly VCL example

defaul.vcl

pragma optional_param geoip_opt_in true;
pragma optional_param max_object_size 20971520;
pragma optional_param smiss_max_object_size 20971520;
pragma optional_param fetchless_purge_all 1;
pragma optional_param default_ssl_check_cert 1;
pragma optional_param max_backends 5;
pragma optional_param customer_id "69tE1aWeLLcC9NVLbklz7g";
C!
W!
# Backends
backend F_Host_1 {
    .between_bytes_timeout = 10s;
    .connect_timeout = 1s;
    .first_byte_timeout = 15s;
    .host = "192.241.187.7";
    .max_connections = 200;
    .port = "80";
    .share_key = "3bJZGwsg1uCus7rtRkriyC";
}
sub vcl_recv {
#--FASTLY RECV BEGIN
  if (req.restarts == 0) {
    if (!req.http.X-Timer) {
      set req.http.X-Timer = "S" time.start.sec "." time.start.usec_frac;
    }
    set req.http.X-Timer = req.http.X-Timer ",VS0";
  }
  declare local var.fastly_req_do_shield BOOL;
  set var.fastly_req_do_shield = (req.restarts == 0);
  # default conditions
  set req.backend = F_Host_1;
# Header rewrite New query string name : 10
      set req.url = req.url.path;
    # end default conditions
#--FASTLY RECV END
    if (req.request != "HEAD" && req.request != "GET" && req.request != "FASTLYPURGE") {
      return(pass);
    }
    return(lookup);
}
sub vcl_fetch {
#--FASTLY FETCH BEGIN
  if (beresp.status >= 500 && beresp.status < 600) {
    if (stale.exists) {
      return(deliver_stale);
    }
    if (req.restarts < 1 && (req.request == "GET" || req.request == "HEAD")) {
      restart;
    }
  }
  set beresp.stale_if_error = 43200s;
# record which cache ran vcl_fetch for this object and when
  set beresp.http.Fastly-Debug-Path = "(F " server.identity " " now.sec ") " if(beresp.http.Fastly-Debug-Path, beresp.http.Fastly-Debug-Path, "");
# generic mechanism to vary on something
  if (req.http.Fastly-Vary-String) {
    if (beresp.http.Vary) {
      set beresp.http.Vary = "Fastly-Vary-String, "  beresp.http.Vary;
    } else {
      set beresp.http.Vary = "Fastly-Vary-String, ";
    }
  }
 # priority: 0
    # cache settings
    set beresp.ttl = 31622400s;
    set beresp.grace = 31622400s;
    return(deliver);
  # Gzip Generated by default gzip policy
  if ((beresp.status == 200 || beresp.status == 404) && (beresp.http.content-type ~ "^(text/html|application/x-javascript|text/css|application/javascript|text/javascript|application/json|application/vnd\.ms-fontobject|application/x-font-opentype|application/x-font-truetype|application/x-font-ttf|application/xml|font/eot|font/opentype|font/otf|image/svg\+xml|image/vnd\.microsoft\.icon|text/plain|text/xml)\s*($|;)" || req.url ~ "\.(css|js|html|eot|ico|otf|ttf|json|svg)($|\?)" ) ) {
    # always set vary to make sure uncompressed versions dont always win
    if (!beresp.http.Vary ~ "Accept-Encoding") {
      if (beresp.http.Vary) {
        set beresp.http.Vary = beresp.http.Vary ", Accept-Encoding";
      } else {
         set beresp.http.Vary = "Accept-Encoding";
      }
    }
    if (req.http.Accept-Encoding == "gzip") {
      set beresp.gzip = true;
    }
  }
  # Gzip gzip
  if ((beresp.status == 200 || beresp.status == 404) && (beresp.http.content-type ~ "^(text/html|application/x-javascript|text/css|application/javascript|text/javascript|application/json|application/vnd\.ms-fontobject|application/x-font-opentype|application/x-font-truetype|application/x-font-ttf|application/xml|font/eot|font/opentype|font/otf|image/svg\+xml|image/vnd\.microsoft\.icon|text/plain|text/xml)\s*($|;)" || req.url ~ "\.(css|js|html|eot|ico|otf|ttf|json|svg)($|\?)" ) ) {
    # always set vary to make sure uncompressed versions dont always win
    if (!beresp.http.Vary ~ "Accept-Encoding") {
      if (beresp.http.Vary) {
        set beresp.http.Vary = beresp.http.Vary ", Accept-Encoding";
      } else {
         set beresp.http.Vary = "Accept-Encoding";
      }
    }
    if (req.http.Accept-Encoding == "gzip") {
      set beresp.gzip = true;
    }
  }
 # priority: 0
 if ( beresp.status == 404 ) {
      # ResponseObject: Generated by synthetic response for 404 page
      error 900 "Fastly Internal";
  }
 # priority: 0
 if ( beresp.status == 503 ) {
      # ResponseObject: Generated by synthetic response for 503 page
      error 901 "Fastly Internal";
  }
#--FASTLY FETCH END
  if ((beresp.status == 500 || beresp.status == 503) && req.restarts < 1 && (req.request == "GET" || req.request == "HEAD")) {
    restart;
  }
  if(req.restarts > 0 ) {
    set beresp.http.Fastly-Restarts = req.restarts;
  }
  if (beresp.http.Set-Cookie) {
    set req.http.Fastly-Cachetype = "SETCOOKIE";
    return (pass);
  }
  if (beresp.http.Cache-Control ~ "private") {
    set req.http.Fastly-Cachetype = "PRIVATE";
    return (pass);
  }
  if (beresp.status == 500 || beresp.status == 503) {
    set req.http.Fastly-Cachetype = "ERROR";
    set beresp.ttl = 1s;
    set beresp.grace = 5s;
    return (deliver);
  }
  if (beresp.http.Expires || beresp.http.Surrogate-Control ~ "max-age" || beresp.http.Cache-Control ~"(s-maxage|max-age)") {
    # keep the ttl here
  } else {
        # apply the default ttl
    set beresp.ttl = 3600s;
  }
  return(deliver);
}
sub vcl_hit {
#--FASTLY HIT BEGIN
# we cannot reach obj.ttl and obj.grace in deliver, save them when we can in vcl_hit
  set req.http.Fastly-Tmp-Obj-TTL = obj.ttl;
  set req.http.Fastly-Tmp-Obj-Grace = obj.grace;
  {
    set req.http.Fastly-Cachetype = "HIT";
  }
#--FASTLY HIT END
  if (!obj.cacheable) {
    return(pass);
  }
  return(deliver);
}
sub vcl_miss {
#--FASTLY MISS BEGIN
# this is not a hit after all, clean up these set in vcl_hit
  unset req.http.Fastly-Tmp-Obj-TTL;
  unset req.http.Fastly-Tmp-Obj-Grace;
  {
    if (req.http.Fastly-Check-SHA1) {
       error 550 "Doesnt exist";
    }
#--FASTLY BEREQ BEGIN
    {
      {
        if (req.http.Fastly-FF) {
          set bereq.http.Fastly-Client = "1";
        }
      }
      {
        # do not send this to the backend
        unset bereq.http.Fastly-Original-Cookie;
        unset bereq.http.Fastly-Original-URL;
        unset bereq.http.Fastly-Vary-String;
        unset bereq.http.X-Varnish-Client;
      }
      if (req.http.Fastly-Temp-XFF) {
         if (req.http.Fastly-Temp-XFF == "") {
           unset bereq.http.X-Forwarded-For;
         } else {
           set bereq.http.X-Forwarded-For = req.http.Fastly-Temp-XFF;
         }
         # unset bereq.http.Fastly-Temp-XFF;
      }
    }
#--FASTLY BEREQ END
 #;
    set req.http.Fastly-Cachetype = "MISS";
  }
#--FASTLY MISS END
  return(fetch);
}
sub vcl_deliver {
#--FASTLY DELIVER BEGIN
# record the journey of the object, expose it only if req.http.Fastly-Debug.
  if (req.http.Fastly-Debug || req.http.Fastly-FF) {
    set resp.http.Fastly-Debug-Path = "(D " server.identity " " now.sec ") "
       if(resp.http.Fastly-Debug-Path, resp.http.Fastly-Debug-Path, "");
    set resp.http.Fastly-Debug-TTL = if(obj.hits > 0, "(H ", "(M ")
       server.identity
       if(req.http.Fastly-Tmp-Obj-TTL && req.http.Fastly-Tmp-Obj-Grace, " " req.http.Fastly-Tmp-Obj-TTL " " req.http.Fastly-Tmp-Obj-Grace " ", " - - ")
       if(resp.http.Age, resp.http.Age, "-")
       ") "
       if(resp.http.Fastly-Debug-TTL, resp.http.Fastly-Debug-TTL, "");
    set resp.http.Fastly-Debug-Digest = digest.hash_sha256(req.digest);
  } else {
    unset resp.http.Fastly-Debug-Path;
    unset resp.http.Fastly-Debug-TTL;
    unset resp.http.Fastly-Debug-Digest;
  }
  # add or append X-Served-By/X-Cache(-Hits)
  {
    if(!resp.http.X-Served-By) {
      set resp.http.X-Served-By  = server.identity;
    } else {
      set resp.http.X-Served-By = resp.http.X-Served-By ", " server.identity;
    }
    set resp.http.X-Cache = if(resp.http.X-Cache, resp.http.X-Cache ", ","") if(fastly_info.state ~ "HIT($|-)", "HIT", "MISS");
    if(!resp.http.X-Cache-Hits) {
      set resp.http.X-Cache-Hits = obj.hits;
    } else {
      set resp.http.X-Cache-Hits = resp.http.X-Cache-Hits ", " obj.hits;
    }
  }
  if (req.http.X-Timer) {
    set resp.http.X-Timer = req.http.X-Timer ",VE" time.elapsed.msec;
  }
  # VARY FIXUP
  {
    # remove before sending to client
    set resp.http.Vary = regsub(resp.http.Vary, "Fastly-Vary-String, ", "");
    if (resp.http.Vary ~ "^\s*$") {
      unset resp.http.Vary;
    }
  }
  unset resp.http.X-Varnish;
  # Pop the surrogate headers into the request object so we can reference them later
  set req.http.Surrogate-Key = resp.http.Surrogate-Key;
  set req.http.Surrogate-Control = resp.http.Surrogate-Control;
  # If we are not forwarding or debugging unset the surrogate headers so they are not present in the response
  if (!req.http.Fastly-FF && !req.http.Fastly-Debug) {
    unset resp.http.Surrogate-Key;
    unset resp.http.Surrogate-Control;
  }
  if(resp.status == 550) {
    return(deliver);
  }
  #default response conditions
        # Cache Condition: Generated by synthetic response for 404 page Prio: 0    
  if (resp.status == 900 ) {
     set resp.status = 404;
     set resp.response = "Not Found";
  }      # Cache Condition: Generated by synthetic response for 503 page Prio: 0    
  if (resp.status == 901 ) {
     set resp.status = 503;
     set resp.response = "Service Unavailable";
  }
#--FASTLY DELIVER END
  return(deliver);
}
sub vcl_error {
#--FASTLY ERROR BEGIN
  if (obj.status >= 500 && obj.status < 600) {
    if (stale.exists) {
      return(deliver_stale);
    }
  }
  if (obj.status == 801) {
     set obj.status = 301;
     set obj.response = "Moved Permanently";
     set obj.http.Location = "https://" req.http.host req.url;
     synthetic {""};
     return (deliver);
  }
        # Cache Condition: Generated by synthetic response for 404 page Prio: 0  
if (obj.status == 900 ) {
   set obj.http.Content-Type = "text/html";
   synthetic {"<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8">
    <title>404</title>
  </head>
  <body>
    404
  </body>
</html>"};
   return(deliver);
}
      # Cache Condition: Generated by synthetic response for 503 page Prio: 0  
if (obj.status == 901 ) {
   set obj.http.Content-Type = "text/html";
   synthetic {"<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8">
    <title>503</title>
  </head>
  <body>
    503
  </body>
</html>"};
   return(deliver);
}
  if (req.http.Fastly-Restart-On-Error) {
    if (obj.status == 503 && req.restarts == 0) {
      restart;
    }
  }
  {
    if (obj.status == 550) {
      return(deliver);
    }
  }
#--FASTLY ERROR END
}
sub vcl_pipe {
#--FASTLY PIPE BEGIN
  {
#--FASTLY BEREQ BEGIN
    {
      {
        if (req.http.Fastly-FF) {
          set bereq.http.Fastly-Client = "1";
        }
      }
      {
        # do not send this to the backend
        unset bereq.http.Fastly-Original-Cookie;
        unset bereq.http.Fastly-Original-URL;
        unset bereq.http.Fastly-Vary-String;
        unset bereq.http.X-Varnish-Client;
      }
      if (req.http.Fastly-Temp-XFF) {
         if (req.http.Fastly-Temp-XFF == "") {
           unset bereq.http.X-Forwarded-For;
         } else {
           set bereq.http.X-Forwarded-For = req.http.Fastly-Temp-XFF;
         }
         # unset bereq.http.Fastly-Temp-XFF;
      }
    }
#--FASTLY BEREQ END
    #;
    set req.http.Fastly-Cachetype = "PIPE";
    set bereq.http.connection = "close";
  }
#--FASTLY PIPE END
}
sub vcl_pass {
#--FASTLY PASS BEGIN
  {
#--FASTLY BEREQ BEGIN
    {
      {
        if (req.http.Fastly-FF) {
          set bereq.http.Fastly-Client = "1";
        }
      }
      {
        # do not send this to the backend
        unset bereq.http.Fastly-Original-Cookie;
        unset bereq.http.Fastly-Original-URL;
        unset bereq.http.Fastly-Vary-String;
        unset bereq.http.X-Varnish-Client;
      }
      if (req.http.Fastly-Temp-XFF) {
         if (req.http.Fastly-Temp-XFF == "") {
           unset bereq.http.X-Forwarded-For;
         } else {
           set bereq.http.X-Forwarded-For = req.http.Fastly-Temp-XFF;
         }
         # unset bereq.http.Fastly-Temp-XFF;
      }
    }
#--FASTLY BEREQ END
 #;
    set req.http.Fastly-Cachetype = "PASS";
  }
#--FASTLY PASS END
}
sub vcl_log {
#--FASTLY LOG BEGIN
  # default response conditions
#--FASTLY LOG END
}
sub vcl_hash {
#--FASTLY HASH BEGIN
  #if unspecified fall back to normal
  {
    set req.hash += req.url;
    set req.hash += req.http.host;
    set req.hash += req.vcl.generation;
    return (hash);
  }
#--FASTLY HASH END
}