filters/email-gravatar.lua

   1 -- This script may be used with the email-filter or repo.email-filter settings in cgitrc.
   2 -- It adds gravatar icons to author names. It is designed to be used with the lua:
   3 -- prefix in filters. It is much faster than the corresponding python script.
   4 --
   5 -- Requirements:
   6 --      luaossl
   7 --      <http://25thandclement.com/~william/projects/luaossl.html>
   8 --
   9
  10 local digest = require("openssl.digest")
  11
  12 function md5_hex(input)
  13         local b = digest.new("md5"):final(input)
  14         local x = ""
  15         for i = 1, #b do
  16                 x = x .. string.format("%.2x", string.byte(b, i))
  17         end
  18         return x
  19 end
  20
  21 function filter_open(email, page)
  22         buffer = ""
  23         md5 = md5_hex(email:sub(2, -2):lower())
  24 end
  25
  26 function filter_close()
  27         html("<img src='//www.gravatar.com/avatar/" .. md5 .. "?s=13&amp;d=retro' width='13' height='13' alt='Gravatar' /> " .. buffer)
  28         return 0
  29 end
  30
  31 function filter_write(str)
  32         buffer = buffer .. str
  33 end
  34
  35