git.squeep.com Git - akkoma/blob - installation/pleroma.vcl

   1 vcl 4.1;
   2 import std;
   3
   4 backend default {
   5     .host = "127.0.0.1";
   6     .port = "4000";
   7 }
   8
   9 # ACL for IPs that are allowed to PURGE data from the cache
  10 acl purge {
  11     "127.0.0.1";
  12 }
  13
  14 sub vcl_recv {
  15     # Redirect HTTP to HTTPS
  16     if (std.port(server.ip) != 443) {
  17       set req.http.x-redir = "https://" + req.http.host + req.url;
  18       return (synth(750, ""));
  19     }
  20
  21     # CHUNKED SUPPORT
  22     if (req.http.Range ~ "bytes=") {
  23       set req.http.x-range = req.http.Range;
  24     }
  25
  26     # Pipe if WebSockets request is coming through
  27     if (req.http.upgrade ~ "(?i)websocket") {
  28       return (pipe);
  29     }
  30
  31     # Allow purging of the cache
  32     if (req.method == "PURGE") {
  33       if (!client.ip ~ purge) {
  34         return(synth(405,"Not allowed."));
  35       }
  36       return(purge);
  37     }
  38 }
  39
  40 sub vcl_backend_response {
  41     # gzip text content
  42     if (beresp.http.content-type ~ "(text|text/css|application/x-javascript|application/javascript)") {
  43       set beresp.do_gzip = true;
  44     }
  45
  46     # Retry broken backend responses.
  47     if (beresp.status == 503) {
  48       set bereq.http.X-Varnish-Backend-503 = "1";
  49       return (retry);
  50     }
  51
  52     # CHUNKED SUPPORT
  53     if (bereq.http.x-range ~ "bytes=" && beresp.status == 206) {
  54       set beresp.ttl = 10m;
  55       set beresp.http.CR = beresp.http.content-range;
  56     }
  57
  58     # Don't cache objects that require authentication
  59     if (beresp.http.Authorization && !beresp.http.Cache-Control ~ "public") {
  60       set beresp.uncacheable = true;
  61       return (deliver);
  62     }
  63
  64     # Allow serving cached content for 6h in case backend goes down
  65     set beresp.grace = 6h;
  66
  67     # Do not cache 5xx responses
  68     if (beresp.status == 500 || beresp.status == 502 || beresp.status == 503 || beresp.status == 504) {
  69       set beresp.uncacheable = true;
  70       return (abandon);
  71     }
  72
  73     # Do not cache redirects and errors
  74     if ((beresp.status >= 300) && (beresp.status < 500)) {
  75       set beresp.uncacheable = true;
  76       set beresp.ttl = 30s;
  77       return (deliver);
  78     }
  79 }
  80
  81 # The synthetic response for 301 redirects
  82 sub vcl_synth {
  83     if (resp.status == 750) {
  84       set resp.status = 301;
  85       set resp.http.Location = req.http.x-redir;
  86       return(deliver);
  87     }
  88 }
  89
  90 # Ensure WebSockets through the pipe do not close prematurely
  91 sub vcl_pipe {
  92     if (req.http.upgrade) {
  93       set bereq.http.upgrade = req.http.upgrade;
  94       set bereq.http.connection = req.http.connection;
  95     }
  96 }
  97
  98 sub vcl_hash {
  99     # CHUNKED SUPPORT
 100     if (req.http.x-range ~ "bytes=") {
 101       hash_data(req.http.x-range);
 102       unset req.http.Range;
 103     }
 104 }
 105
 106 sub vcl_backend_fetch {
 107     # Be more lenient for slow servers on the fediverse
 108     if bereq.url ~ "^/proxy/" {
 109       set bereq.first_byte_timeout = 300s;
 110     }
 111
 112     # CHUNKED SUPPORT
 113     if (bereq.http.x-range) {
 114       set bereq.http.Range = bereq.http.x-range;
 115     }
 116
 117     if (bereq.retries == 0) {
 118         # Clean up the X-Varnish-Backend-503 flag that is used internally
 119         # to mark broken backend responses that should be retried.
 120         unset bereq.http.X-Varnish-Backend-503;
 121     } else {
 122         if (bereq.http.X-Varnish-Backend-503) {
 123             if (bereq.method != "POST" &&
 124               std.healthy(bereq.backend) &&
 125               bereq.retries <= 4) {
 126               # Flush broken backend response flag & try again.
 127               unset bereq.http.X-Varnish-Backend-503;
 128             } else {
 129               return (abandon);
 130             }
 131         }
 132     }
 133 }
 134
 135 sub vcl_deliver {
 136     # CHUNKED SUPPORT
 137     if (resp.http.CR) {
 138       set resp.http.Content-Range = resp.http.CR;
 139       unset resp.http.CR;
 140     }
 141 }
 142
 143 sub vcl_backend_error {
 144     # Retry broken backend responses.
 145     set bereq.http.X-Varnish-Backend-503 = "1";
 146     return (retry);
 147 }