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Python Source  |  2000-06-02  |  15.0 KB  |  415 lines
  1. ##############################################################################
  2. # 
  3. # Zope Public License (ZPL) Version 1.0
  4. # -------------------------------------
  5. # 
  6. # Copyright (c) Digital Creations.  All rights reserved.
  7. # 
  8. # This license has been certified as Open Source(tm).
  9. # 
  10. # Redistribution and use in source and binary forms, with or without
  11. # modification, are permitted provided that the following conditions are
  12. # met:
  13. # 
  14. # 1. Redistributions in source code must retain the above copyright
  15. #    notice, this list of conditions, and the following disclaimer.
  16. # 
  17. # 2. Redistributions in binary form must reproduce the above copyright
  18. #    notice, this list of conditions, and the following disclaimer in
  19. #    the documentation and/or other materials provided with the
  20. #    distribution.
  21. # 
  22. # 3. Digital Creations requests that attribution be given to Zope
  23. #    in any manner possible. Zope includes a "Powered by Zope"
  24. #    button that is installed by default. While it is not a license
  25. #    violation to remove this button, it is requested that the
  26. #    attribution remain. A significant investment has been put
  27. #    into Zope, and this effort will continue if the Zope community
  28. #    continues to grow. This is one way to assure that growth.
  29. # 
  30. # 4. All advertising materials and documentation mentioning
  31. #    features derived from or use of this software must display
  32. #    the following acknowledgement:
  33. # 
  34. #      "This product includes software developed by Digital Creations
  35. #      for use in the Z Object Publishing Environment
  36. #      (http://www.zope.org/)."
  37. # 
  38. #    In the event that the product being advertised includes an
  39. #    intact Zope distribution (with copyright and license included)
  40. #    then this clause is waived.
  41. # 
  42. # 5. Names associated with Zope or Digital Creations must not be used to
  43. #    endorse or promote products derived from this software without
  44. #    prior written permission from Digital Creations.
  45. # 
  46. # 6. Modified redistributions of any form whatsoever must retain
  47. #    the following acknowledgment:
  48. # 
  49. #      "This product includes software developed by Digital Creations
  50. #      for use in the Z Object Publishing Environment
  51. #      (http://www.zope.org/)."
  52. # 
  53. #    Intact (re-)distributions of any official Zope release do not
  54. #    require an external acknowledgement.
  55. # 
  56. # 7. Modifications are encouraged but must be packaged separately as
  57. #    patches to official Zope releases.  Distributions that do not
  58. #    clearly separate the patches from the original work must be clearly
  59. #    labeled as unofficial distributions.  Modifications which do not
  60. #    carry the name Zope may be packaged in any form, as long as they
  61. #    conform to all of the clauses above.
  62. # 
  63. # 
  64. # Disclaimer
  65. # 
  66. #   THIS SOFTWARE IS PROVIDED BY DIGITAL CREATIONS ``AS IS'' AND ANY
  67. #   EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  68. #   IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  69. #   PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL DIGITAL CREATIONS OR ITS
  70. #   CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  71. #   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  72. #   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
  73. #   USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  74. #   ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  75. #   OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  76. #   OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  77. #   SUCH DAMAGE.
  78. # 
  79. # 
  80. # This software consists of contributions made by Digital Creations and
  81. # many individuals on behalf of Digital Creations.  Specific
  82. # attributions are listed in the accompanying credits file.
  83. # 
  84. ##############################################################################
  85. __doc__="""Python Object Publisher -- Publish Python objects on web servers
  86.  
  87. $Id: Publish.py,v 1.147 2000/06/02 20:03:25 jim Exp $"""
  88. __version__='$Revision: 1.147 $'[11:-2]
  89.  
  90. import sys, os
  91. from string import lower, atoi, rfind, strip
  92. from Response import Response
  93. from Request import Request
  94. from maybe_lock import allocate_lock
  95. from mapply import mapply
  96.  
  97. class Retry(Exception):
  98.     """Raise this to retry a request
  99.     """
  100.  
  101.     def __init__(self, t=None, v=None, tb=None):
  102.         self._args=t, v, tb
  103.  
  104.     def reraise(self):
  105.         t, v, tb = self._args
  106.         if t is None: t=Retry
  107.         if tb is None: raise t, v
  108.         try: raise t, v, tb
  109.         finally: tb=None
  110.  
  111. def call_object(object, args, request):
  112.     result=apply(object,args) # Type s<cr> to step into published object.
  113.     return result
  114.  
  115. def missing_name(name, request):
  116.     if name=='self': return request['PARENTS'][0]
  117.     request.response.badRequestError(name)
  118.  
  119. def dont_publish_class(klass, request):
  120.     request.response.forbiddenError("class %s" % klass.__name__)
  121.  
  122. def publish(request, module_name, after_list, debug=0,
  123.             # Optimize:
  124.             call_object=call_object,
  125.             missing_name=missing_name,
  126.             dont_publish_class=dont_publish_class,
  127.             mapply=mapply,
  128.             ):
  129.  
  130.     (bobo_before, bobo_after, object, realm, debug_mode, err_hook,
  131.      validated_hook, transactions_manager)= get_module_info(module_name)
  132.  
  133.     parents=None
  134.  
  135.     try:
  136.         request.processInputs()
  137.  
  138.         request_get=request.get
  139.         response=request.response
  140.     
  141.         # First check for "cancel" redirect:
  142.         cancel=''
  143.         if lower(strip(request_get('SUBMIT','')))=='cancel':
  144.             cancel=request_get('CANCEL_ACTION','')
  145.             if cancel: raise 'Redirect', cancel
  146.     
  147.         after_list[0]=bobo_after
  148.         if debug_mode: response.debug_mode=debug_mode
  149.         if realm and not request.get('REMOTE_USER',None):
  150.             response.realm=realm
  151.     
  152.         if bobo_before is not None:
  153.             bobo_before()
  154.     
  155.         # Get a nice clean path list:
  156.         path=strip(request_get('PATH_INFO'))
  157.     
  158.         request['PARENTS']=parents=[object]
  159.         
  160.         if transactions_manager: transactions_manager.begin()
  161.     
  162.         object=request.traverse(path, validated_hook=validated_hook)
  163.     
  164.         if transactions_manager:
  165.             transactions_manager.recordMetaData(object, request)
  166.     
  167.         result=mapply(object, request.args, request,
  168.                       call_object,1,
  169.                       missing_name, 
  170.                       dont_publish_class,
  171.                       request, bind=1)
  172.     
  173.         if result is not response: response.setBody(result)
  174.     
  175.         if transactions_manager: transactions_manager.commit()
  176.  
  177.         return response
  178.     except:
  179.         if transactions_manager: transactions_manager.abort()
  180.         
  181.         if err_hook is not None:
  182.             if parents: parents=parents[0]
  183.             try:
  184.                 return err_hook(parents, request,
  185.                                 sys.exc_info()[0],
  186.                                 sys.exc_info()[1],
  187.                                 sys.exc_info()[2],
  188.                                 )
  189.             except Retry:
  190.                 # We need to try again....
  191.                 if not request.supports_retry():
  192.                     return err_hook(parents, request,
  193.                                     sys.exc_info()[0],
  194.                                     sys.exc_info()[1],
  195.                                     sys.exc_info()[2],
  196.                                     )
  197.                 newrequest=request.retry()
  198.                 try:
  199.                     return publish(newrequest, module_name, after_list, debug)
  200.                 finally:
  201.                     newrequest.close()
  202.                     
  203.         else: raise
  204.             
  205.  
  206. def publish_module(module_name,
  207.                    stdin=sys.stdin, stdout=sys.stdout, stderr=sys.stderr,
  208.                    environ=os.environ, debug=0, request=None, response=None):
  209.     must_die=0
  210.     status=200
  211.     after_list=[None]
  212.     try:
  213.         try:
  214.             if response is None:
  215.                 response=Response(stdout=stdout, stderr=stderr)
  216.             else:
  217.                 stdout=response.stdout
  218.  
  219.             if request is None:
  220.                 request=Request(stdin, environ, response)
  221.  
  222.             response = publish(request, module_name, after_list, debug=debug)
  223.         except SystemExit, v:
  224.             must_die=sys.exc_info()
  225.             request.response.exception(must_die)
  226.         except ImportError, v:
  227.             if type(v) is type(()) and len(v)==3: must_die=v
  228.             elif hasattr(sys, 'exc_info'): must_die=sys.exc_info()
  229.             else: must_die = SystemExit, v, sys.exc_info()[2]
  230.             request.response.exception(1, v)
  231.         except:
  232.             request.response.exception()
  233.             status=response.getStatus()
  234.  
  235.         if response:
  236.             outputBody=getattr(response, 'outputBody', None)
  237.             if outputBody is not None:
  238.                 outputBody()
  239.             else:
  240.                 response=str(response)
  241.                 if response: stdout.write(response)
  242.  
  243.         # The module defined a post-access function, call it
  244.         if after_list[0] is not None: after_list[0]()
  245.  
  246.     finally:
  247.         if request is not None: request.close()
  248.  
  249.     if must_die:
  250.         try: raise must_die[0], must_die[1], must_die[2]
  251.         finally: must_die=None
  252.  
  253.     return status
  254.  
  255.  
  256. _l=allocate_lock()
  257. def get_module_info(module_name, modules={},
  258.                     acquire=_l.acquire,
  259.                     release=_l.release,
  260.                     ):
  261.  
  262.     if modules.has_key(module_name): return modules[module_name]
  263.  
  264.     if module_name[-4:]=='.cgi': module_name=module_name[:-4]
  265.  
  266.     acquire()
  267.     tb=None
  268.     try:
  269.         try:
  270.             module=__import__(module_name, globals(), globals(), ('__doc__',))
  271.  
  272.             realm=module_name
  273.  
  274.             # Let the app specify a realm
  275.             if hasattr(module,'__bobo_realm__'):
  276.                 realm=module.__bobo_realm__
  277.             elif os.environ.has_key('Z_REALM'):
  278.                 realm=os.environ['Z_REALM']
  279.             elif os.environ.has_key('BOBO_REALM'):
  280.                 realm=os.environ['BOBO_REALM']
  281.             else: realm=module_name
  282.  
  283.             # Check for debug mode
  284.             if hasattr(module,'__bobo_debug_mode__'):
  285.                 debug_mode=not not module.__bobo_debug_mode__
  286.             elif (os.environ.has_key('Z_DEBUG_MODE') or
  287.                   os.environ.has_key('BOBO_DEBUG_MODE')):
  288.                 if os.environ.has_key('Z_DEBUG_MODE'):
  289.                     debug_mode=lower(os.environ['Z_DEBUG_MODE'])
  290.                 else:
  291.                     debug_mode=lower(os.environ['BOBO_DEBUG_MODE'])
  292.                 if debug_mode=='y' or debug_mode=='yes':
  293.                     debug_mode=1
  294.                 else:
  295.                     try: debug_mode=atoi(debug_mode)
  296.                     except: debug_mode=None
  297.             else: debug_mode=None
  298.  
  299.             if hasattr(module,'__bobo_before__'):
  300.                 bobo_before=module.__bobo_before__
  301.             else: bobo_before=None
  302.  
  303.             if hasattr(module,'__bobo_after__'): bobo_after=module.__bobo_after__
  304.             else: bobo_after=None
  305.  
  306.             if hasattr(module,'bobo_application'):
  307.                 object=module.bobo_application
  308.             elif hasattr(module,'web_objects'):
  309.                 object=module.web_objects
  310.             else: object=module
  311.  
  312.             error_hook=getattr(module,'zpublisher_exception_hook', None)
  313.             validated_hook=getattr(module,'zpublisher_validated_hook', None)
  314.  
  315.             transactions_manager=getattr(
  316.                 module,'zpublisher_transactions_manager', None)
  317.             if not transactions_manager:
  318.                 try: get_transaction()
  319.                 except: pass
  320.                 else:
  321.                     # Create a default transactions manager for use
  322.                     # by software that uses ZPublisher and ZODB but
  323.                     # not the rest of Zope.
  324.                     transactions_manager = DefaultTransactionsManager()
  325.  
  326.             info= (bobo_before, bobo_after, object, realm, debug_mode,
  327.                    error_hook, validated_hook, transactions_manager)
  328.  
  329.             modules[module_name]=modules[module_name+'.cgi']=info
  330.             
  331.             return info
  332.         except:
  333.             t,v,tb=sys.exc_info()
  334.             v=str(v)
  335.             raise ImportError, (t, v), tb
  336.     finally:
  337.         tb=None
  338.         release()
  339.  
  340.  
  341. class DefaultTransactionsManager:
  342.     def begin(self): get_transaction().begin()
  343.     def commit(self): get_transaction().commit()
  344.     def abort(self): get_transaction().abort()
  345.     def recordMetaData(self, object, request):
  346.         # Is this code needed?
  347.         request_get = request.get
  348.         T=get_transaction()
  349.         T.note(request_get('PATH_INFO'))
  350.         auth_user=request_get('AUTHENTICATED_USER',None)
  351.         if auth_user is not None:
  352.             T.setUser(auth_user, request_get('AUTHENTICATION_PATH'))
  353.         
  354.  
  355. # ZPublisher profiler support
  356. # ---------------------------
  357.  
  358. if os.environ.get('PROFILE_PUBLISHER', None):
  359.  
  360.     import profile, pstats
  361.  
  362.     _pfile=os.environ['PROFILE_PUBLISHER']
  363.     _plock=allocate_lock()
  364.     _pfunc=publish_module
  365.     _pstat=None
  366.  
  367.     def pm(module_name, stdin, stdout, stderr, 
  368.            environ, debug, request, response):
  369.         try:
  370.             r=_pfunc(module_name, stdin=stdin, stdout=stdout, 
  371.                      stderr=stderr, environ=environ, debug=debug, 
  372.                      request=request, response=response)
  373.         except: r=None
  374.         sys._pr_=r
  375.  
  376.     def publish_module(module_name, stdin=sys.stdin, stdout=sys.stdout, 
  377.                        stderr=sys.stderr, environ=os.environ, debug=0, 
  378.                        request=None, response=None):
  379.         _plock.acquire()
  380.         try:
  381.             if request is not None:
  382.                 path_info=request.get('PATH_INFO')
  383.             else: path_info=environ.get('PATH_INFO')
  384.             if path_info[-14:]=='manage_profile':
  385.                 return _pfunc(module_name, stdin=stdin, stdout=stdout, 
  386.                               stderr=stderr, environ=environ, debug=debug, 
  387.                               request=request, response=response)
  388.             pobj=profile.Profile()
  389.             pobj.runcall(pm, module_name, stdin, stdout, stderr, 
  390.                          environ, debug, request, response)
  391.             result=sys._pr_
  392.             pobj.create_stats()
  393.             if _pstat is None:
  394.                 global _pstat
  395.                 _pstat=sys._ps_=pstats.Stats(pobj)
  396.             else: _pstat.add(pobj)
  397.         finally:
  398.             _plock.release()
  399.  
  400.         if result is None:
  401.             try:
  402.                 error=sys.exc_info()
  403.                 file=open(_pfile, 'w')
  404.                 sys.stdout=file
  405.                 _pstat.strip_dirs().sort_stats('cumulative').print_stats(250)
  406.                 _pstat.strip_dirs().sort_stats('time').print_stats(250)
  407.                 file.flush()
  408.                 file.close()
  409.             except: pass
  410.             raise error[0], error[1], error[2]
  411.         return result
  412.  
  413.  
  414.  
  415.