NAME

       vmod_std - Varnish Standard Module

SYNOPSIS

       import std

DESCRIPTION

       The  Varnish standard module contains useful, generic function that don't quite fit in the
       VCL core, but are still considered very useful to a broad audience.

FUNCTIONS

   toupper
       Prototype
              toupper(STRING s)

       Return value
              String

       Description
              Converts the string s to upper case.

       Example
              set beresp.http.x-scream = std.toupper("yes!");

   tolower
       Prototype
              tolower(STRING s)

       Return value
              String

       Description
              Converts the string s to lower case.

       Example
              set beresp.http.x-nice = std.tolower("VerY");

   set_ip_tos
       Prototype
              set_ip_tos(INT i)

       Return value
              Void

       Description
              Sets the Type-of-Service flag for the current session. Please  note  that  the  TOS
              flag  is  not removed by the end of the request so probably want to set it on every
              request should you utilize it.

       Example
              if (req.url ~ ^/slow/) {
                std.set_ip_tos(0x0);
              }

   random
       Prototype
              random(REAL a, REAL b)

       Return value
              Real

       Description
              Returns a random REAL number between a and b.

       Example
              set beresp.http.x-random-number = std.random(1, 100);

   log
       Prototype
              log(STRING string)

       Return value
              Void

       Description
              Logs string to the shared memory log.

       Example
              std.log("Something fishy is going on with the vhost " + req.host);

   syslog
       Prototype
              syslog(INT priority, STRING string)

       Return value
              Void

       Description
              Logs string to syslog marked with priority.

       Example
              std.syslog( LOG_USER|LOG_ALERT, "There is serious troble");

   fileread
       Prototype
              fileread(STRING filename)

       Return value
              String

       Description
              Reads a file and returns a string with the content. Please  note  that  it  is  not
              recommended  to send variables to this function the caching in the function doesn't
              take this into account. Also, files are not re-read.

       Example
              set beresp.http.x-served-by = std.fileread("/etc/hostname");

   duration
       Prototype
              duration(STRING s, DURATION fallback)

       Return value
              Duration

       Description
              Converts the string s to seconds. s can be quantified with the usual s (seconds), m
              (minutes),  h  (hours), d (days) and w (weeks) units. If s fails to parse, fallback
              will be used.

       Example
              set beresp.ttl = std.duration("1w", 3600s);

   integer
       Prototype
              integer(STRING s, INT fallback)

       Return value
              Int

       Description
              Converts the string s to an integer.  If s fails to parse, fallback will be used

       Example
              if (std.integer(beresp.http.x-foo, 0) > 5) { ... }

   collect
       Prototype
              collect(HEADER header)

       Return value
              Void

       Description
              Collapses the header, joining the headers into one.

       Example
              std.collect(req.http.cookie); This will collapse several Cookie: headers into  one,
              long cookie header.

SEE ALSO

       • vcl(7)

       • varnishd(1)

HISTORY

       The  Varnish  standard module was released along with Varnish Cache 3.0.  This manual page
       was written by Per Buer with help from Martin Blix Grydeland.

COPYRIGHT

       This document is licensed under the same  licence  as  Varnish  itself.  See  LICENCE  for
       details.

       • Copyright (c) 2011 Varnish Software

AUTHOR

       Per Buer