1 import os
   2 from subprocess import Popen, PIPE
   3 from hashlib import sha1
   4 from MoinMoin.Page import Page
   5 
   6 qr_options = ["-s", "4"]
   7 
   8 def png_path(request, pagename, text):
   9         return "/PATH/TO/wiki-data/qr", png_filename(text)
  10 def png_url(request, pagename, text):
  11         return "/wiki-data/qr/" + png_filename(text)
  12 def png_filename(text):
  13         return sha1(text).hexdigest()[:16] + ".png"
  14 
  15 def macro_QR(macro, text=None):
  16         if text is None:
  17                 text = macro.request.getQualifiedURL(macro.request.page.url(macro.request))
  18 
  19         prefix, suffix = png_path(macro.request, macro.request.page.page_name, text)
  20         if not os.path.exists(prefix):
  21                 os.mkdir(prefix)
  22 
  23         filename = os.path.join(prefix, suffix)
  24         if not os.path.exists(filename):
  25                 p = Popen(["qrencode", "-o", filename] + qr_options, stdin=PIPE)
  26                 p.stdin.write(text)
  27                 p.stdin.close()
  28                 p.wait()
  29 
  30         img_url = png_url(macro.request, macro.request.page.page_name, text)
  31         return macro.formatter.image(img_url, alt=text, title=text)