[Moin-devel] CVS: MoinMoin/webapi cgiMoin.py,1.13,1.14

[J?rgen Hermann]

Update of /cvsroot/moin/MoinMoin/webapi
In directory usw-pr-cvs1:/tmp/cvs-serv13134/MoinMoin/webapi

Modified Files:
	cgiMoin.py 
Log Message:
StdoutGuard to detect premature CGI output


Index: cgiMoin.py
===================================================================
RCS file: /cvsroot/moin/MoinMoin/webapi/cgiMoin.py,v
retrieving revision 1.13
retrieving revision 1.14
diff -C2 -r1.13 -r1.14
*** cgiMoin.py	17 Apr 2002 21:58:17 -0000	1.13
--- cgiMoin.py	22 May 2002 19:08:19 -0000	1.14
***************
*** 13,17 ****
  
  # Imports
! import os, string
  
  #############################################################################
--- 13,17 ----
  
  # Imports
! import os, string, sys
  
  #############################################################################
***************
*** 76,79 ****
--- 76,94 ----
  #############################################################################
  
+ class StdoutGuard:
+     """ Throw an exception when someone tries to write prematurely to
+         sys.stdout.
+     """
+ 
+     def __init__(self, request):
+         self.request = request
+ 
+     def __getattr__(self, attr):
+         # send headers, then raise an exception to create a stack trace
+         sys.stdout = sys.__stdout__
+         http_headers(self.request)
+         raise RuntimeError("Premature access to sys.stdout.%s" % attr)
+ 
+ 
  def setHttpHeader(request, header):
      request.user_headers.append(header)
***************
*** 88,91 ****
--- 103,109 ----
      request.sent_headers = 1
      have_ct = 0
+ 
+     # deactivate guard
+     sys.stdout = sys.__stdout__
  
      # send http headers