1 """WWW request handler (also used in the stand-alone server).
2 """
3 __docformat__ = 'restructuredtext'
5 import base64, binascii, cgi, codecs, httplib, mimetypes, os
6 import quopri, random, re, rfc822, stat, sys, time, urllib, urlparse
7 import Cookie, socket, errno
8 from Cookie import CookieError, BaseCookie, SimpleCookie
9 from cStringIO import StringIO
11 from roundup import roundupdb, date, hyperdb, password
12 from roundup.cgi import templating, cgitb, TranslationService
13 from roundup.cgi.actions import *
14 from roundup.exceptions import *
15 from roundup.cgi.exceptions import *
16 from roundup.cgi.form_parser import FormParser
17 from roundup.mailer import Mailer, MessageSendError, encode_quopri
18 from roundup.cgi import accept_language
19 from roundup import xmlrpc
21 def initialiseSecurity(security):
22 '''Create some Permissions and Roles on the security object
24 This function is directly invoked by security.Security.__init__()
25 as a part of the Security object instantiation.
26 '''
27 p = security.addPermission(name="Web Access",
28 description="User may access the web interface")
29 security.addPermissionToRole('Admin', p)
31 # doing Role stuff through the web - make sure Admin can
32 # TODO: deprecate this and use a property-based control
33 p = security.addPermission(name="Web Roles",
34 description="User may manipulate user Roles through the web")
35 security.addPermissionToRole('Admin', p)
37 # used to clean messages passed through CGI variables - HTML-escape any tag
38 # that isn't <a href="">, <i>, <b> and <br> (including XHTML variants) so
39 # that people can't pass through nasties like <script>, <iframe>, ...
40 CLEAN_MESSAGE_RE = r'(<(/?(.*?)(\s*href="[^"]")?\s*/?)>)'
41 def clean_message(message, mc=re.compile(CLEAN_MESSAGE_RE, re.I)):
42 return mc.sub(clean_message_callback, message)
43 def clean_message_callback(match, ok={'a':1,'i':1,'b':1,'br':1}):
44 """ Strip all non <a>,<i>,<b> and <br> tags from a string
45 """
46 if ok.has_key(match.group(3).lower()):
47 return match.group(1)
48 return '<%s>'%match.group(2)
51 error_message = ''"""<html><head><title>An error has occurred</title></head>
52 <body><h1>An error has occurred</h1>
53 <p>A problem was encountered processing your request.
54 The tracker maintainers have been notified of the problem.</p>
55 </body></html>"""
58 class LiberalCookie(SimpleCookie):
59 """ Python's SimpleCookie throws an exception if the cookie uses invalid
60 syntax. Other applications on the same server may have done precisely
61 this, preventing roundup from working through no fault of roundup.
62 Numerous other python apps have run into the same problem:
64 trac: http://trac.edgewall.org/ticket/2256
65 mailman: http://bugs.python.org/issue472646
67 This particular implementation comes from trac's solution to the
68 problem. Unfortunately it requires some hackery in SimpleCookie's
69 internals to provide a more liberal __set method.
70 """
71 def load(self, rawdata, ignore_parse_errors=True):
72 if ignore_parse_errors:
73 self.bad_cookies = []
74 self._BaseCookie__set = self._loose_set
75 SimpleCookie.load(self, rawdata)
76 if ignore_parse_errors:
77 self._BaseCookie__set = self._strict_set
78 for key in self.bad_cookies:
79 del self[key]
81 _strict_set = BaseCookie._BaseCookie__set
83 def _loose_set(self, key, real_value, coded_value):
84 try:
85 self._strict_set(key, real_value, coded_value)
86 except CookieError:
87 self.bad_cookies.append(key)
88 dict.__setitem__(self, key, None)
91 class Session:
92 """
93 Needs DB to be already opened by client
95 Session attributes at instantiation:
97 - "client" - reference to client for add_cookie function
98 - "session_db" - session DB manager
99 - "cookie_name" - name of the cookie with session id
100 - "_sid" - session id for current user
101 - "_data" - session data cache
103 session = Session(client)
104 session.set(name=value)
105 value = session.get(name)
107 session.destroy() # delete current session
108 session.clean_up() # clean up session table
110 session.update(set_cookie=True, expire=3600*24*365)
111 # refresh session expiration time, setting persistent
112 # cookie if needed to last for 'expire' seconds
114 """
116 def __init__(self, client):
117 self._data = {}
118 self._sid = None
120 self.client = client
121 self.session_db = client.db.getSessionManager()
123 # parse cookies for session id
124 self.cookie_name = 'roundup_session_%s' % \
125 re.sub('[^a-zA-Z]', '', client.instance.config.TRACKER_NAME)
126 cookies = LiberalCookie(client.env.get('HTTP_COOKIE', ''))
127 if self.cookie_name in cookies:
128 if not self.session_db.exists(cookies[self.cookie_name].value):
129 self._sid = None
130 # remove old cookie
131 self.client.add_cookie(self.cookie_name, None)
132 else:
133 self._sid = cookies[self.cookie_name].value
134 self._data = self.session_db.getall(self._sid)
136 def _gen_sid(self):
137 """ generate a unique session key """
138 while 1:
139 s = '%s%s'%(time.time(), random.random())
140 s = binascii.b2a_base64(s).strip()
141 if not self.session_db.exists(s):
142 break
144 # clean up the base64
145 if s[-1] == '=':
146 if s[-2] == '=':
147 s = s[:-2]
148 else:
149 s = s[:-1]
150 return s
152 def clean_up(self):
153 """Remove expired sessions"""
154 self.session_db.clean()
156 def destroy(self):
157 self.client.add_cookie(self.cookie_name, None)
158 self._data = {}
159 self.session_db.destroy(self._sid)
160 self.client.db.commit()
162 def get(self, name, default=None):
163 return self._data.get(name, default)
165 def set(self, **kwargs):
166 self._data.update(kwargs)
167 if not self._sid:
168 self._sid = self._gen_sid()
169 self.session_db.set(self._sid, **self._data)
170 # add session cookie
171 self.update(set_cookie=True)
173 # XXX added when patching 1.4.4 for backward compatibility
174 # XXX remove
175 self.client.session = self._sid
176 else:
177 self.session_db.set(self._sid, **self._data)
178 self.client.db.commit()
180 def update(self, set_cookie=False, expire=None):
181 """ update timestamp in db to avoid expiration
183 if 'set_cookie' is True, set cookie with 'expire' seconds lifetime
184 if 'expire' is None - session will be closed with the browser
186 XXX the session can be purged within a week even if a cookie
187 lifetime is longer
188 """
189 self.session_db.updateTimestamp(self._sid)
190 self.client.db.commit()
192 if set_cookie:
193 self.client.add_cookie(self.cookie_name, self._sid, expire=expire)
197 class Client:
198 """Instantiate to handle one CGI request.
200 See inner_main for request processing.
202 Client attributes at instantiation:
204 - "path" is the PATH_INFO inside the instance (with no leading '/')
205 - "base" is the base URL for the instance
206 - "form" is the cgi form, an instance of FieldStorage from the standard
207 cgi module
208 - "additional_headers" is a dictionary of additional HTTP headers that
209 should be sent to the client
210 - "response_code" is the HTTP response code to send to the client
211 - "translator" is TranslationService instance
213 During the processing of a request, the following attributes are used:
215 - "db"
216 - "error_message" holds a list of error messages
217 - "ok_message" holds a list of OK messages
218 - "session" is deprecated in favor of session_api (XXX remove)
219 - "session_api" is the interface to store data in session
220 - "user" is the current user's name
221 - "userid" is the current user's id
222 - "template" is the current :template context
223 - "classname" is the current class context name
224 - "nodeid" is the current context item id
226 User Identification:
227 Users that are absent in session data are anonymous and are logged
228 in as that user. This typically gives them all Permissions assigned to the
229 Anonymous Role.
231 Every user is assigned a session. "session_api" is the interface to work
232 with session data.
234 Special form variables:
235 Note that in various places throughout this code, special form
236 variables of the form :<name> are used. The colon (":") part may
237 actually be one of either ":" or "@".
238 """
240 # charset used for data storage and form templates
241 # Note: must be in lower case for comparisons!
242 # XXX take this from instance.config?
243 STORAGE_CHARSET = 'utf-8'
245 #
246 # special form variables
247 #
248 FV_TEMPLATE = re.compile(r'[@:]template')
249 FV_OK_MESSAGE = re.compile(r'[@:]ok_message')
250 FV_ERROR_MESSAGE = re.compile(r'[@:]error_message')
252 # Note: index page stuff doesn't appear here:
253 # columns, sort, sortdir, filter, group, groupdir, search_text,
254 # pagesize, startwith
256 # list of network error codes that shouldn't be reported to tracker admin
257 # (error descriptions from FreeBSD intro(2))
258 IGNORE_NET_ERRORS = (
259 # A write on a pipe, socket or FIFO for which there is
260 # no process to read the data.
261 errno.EPIPE,
262 # A connection was forcibly closed by a peer.
263 # This normally results from a loss of the connection
264 # on the remote socket due to a timeout or a reboot.
265 errno.ECONNRESET,
266 # Software caused connection abort. A connection abort
267 # was caused internal to your host machine.
268 errno.ECONNABORTED,
269 # A connect or send request failed because the connected party
270 # did not properly respond after a period of time.
271 errno.ETIMEDOUT,
272 )
274 def __init__(self, instance, request, env, form=None, translator=None):
275 # re-seed the random number generator
276 random.seed()
277 self.start = time.time()
278 self.instance = instance
279 self.request = request
280 self.env = env
281 self.setTranslator(translator)
282 self.mailer = Mailer(instance.config)
284 # save off the path
285 self.path = env['PATH_INFO']
287 # this is the base URL for this tracker
288 self.base = self.instance.config.TRACKER_WEB
290 # check the tracker_we setting
291 if not self.base.endswith('/'):
292 self.base = self.base + '/'
294 # this is the "cookie path" for this tracker (ie. the path part of
295 # the "base" url)
296 self.cookie_path = urlparse.urlparse(self.base)[2]
297 # cookies to set in http responce
298 # {(path, name): (value, expire)}
299 self._cookies = {}
301 # see if we need to re-parse the environment for the form (eg Zope)
302 if form is None:
303 self.form = cgi.FieldStorage(environ=env)
304 else:
305 self.form = form
307 # turn debugging on/off
308 try:
309 self.debug = int(env.get("ROUNDUP_DEBUG", 0))
310 except ValueError:
311 # someone gave us a non-int debug level, turn it off
312 self.debug = 0
314 # flag to indicate that the HTTP headers have been sent
315 self.headers_done = 0
317 # additional headers to send with the request - must be registered
318 # before the first write
319 self.additional_headers = {}
320 self.response_code = 200
322 # default character set
323 self.charset = self.STORAGE_CHARSET
325 # parse cookies (used for charset lookups)
326 # use our own LiberalCookie to handle bad apps on the same
327 # server that have set cookies that are out of spec
328 self.cookie = LiberalCookie(self.env.get('HTTP_COOKIE', ''))
330 self.user = None
331 self.userid = None
332 self.nodeid = None
333 self.classname = None
334 self.template = None
336 def setTranslator(self, translator=None):
337 """Replace the translation engine
339 'translator'
340 is TranslationService instance.
341 It must define methods 'translate' (TAL-compatible i18n),
342 'gettext' and 'ngettext' (gettext-compatible i18n).
344 If omitted, create default TranslationService.
345 """
346 if translator is None:
347 translator = TranslationService.get_translation(
348 language=self.instance.config["TRACKER_LANGUAGE"],
349 tracker_home=self.instance.config["TRACKER_HOME"])
350 self.translator = translator
351 self._ = self.gettext = translator.gettext
352 self.ngettext = translator.ngettext
354 def main(self):
355 """ Wrap the real main in a try/finally so we always close off the db.
356 """
357 try:
358 if self.env.get('CONTENT_TYPE') == 'text/xml':
359 self.handle_xmlrpc()
360 else:
361 self.inner_main()
362 finally:
363 if hasattr(self, 'db'):
364 self.db.close()
367 def handle_xmlrpc(self):
369 # Pull the raw XML out of the form. The "value" attribute
370 # will be the raw content of the POST request.
371 assert self.form.file
372 input = self.form.value
373 # So that the rest of Roundup can query the form in the
374 # usual way, we create an empty list of fields.
375 self.form.list = []
377 # Set the charset and language, since other parts of
378 # Roundup may depend upon that.
379 self.determine_charset()
380 self.determine_language()
381 # Open the database as the correct user.
382 self.determine_user()
384 # Call the appropriate XML-RPC method.
385 handler = xmlrpc.RoundupDispatcher(self.db,
386 self.instance.actions,
387 self.translator,
388 allow_none=True)
389 output = handler.dispatch(input)
391 self.setHeader("Content-Type", "text/xml")
392 self.setHeader("Content-Length", str(len(output)))
393 self.write(output)
395 def inner_main(self):
396 """Process a request.
398 The most common requests are handled like so:
400 1. look for charset and language preferences, set up user locale
401 see determine_charset, determine_language
402 2. figure out who we are, defaulting to the "anonymous" user
403 see determine_user
404 3. figure out what the request is for - the context
405 see determine_context
406 4. handle any requested action (item edit, search, ...)
407 see handle_action
408 5. render a template, resulting in HTML output
410 In some situations, exceptions occur:
412 - HTTP Redirect (generally raised by an action)
413 - SendFile (generally raised by determine_context)
414 serve up a FileClass "content" property
415 - SendStaticFile (generally raised by determine_context)
416 serve up a file from the tracker "html" directory
417 - Unauthorised (generally raised by an action)
418 the action is cancelled, the request is rendered and an error
419 message is displayed indicating that permission was not
420 granted for the action to take place
421 - templating.Unauthorised (templating action not permitted)
422 raised by an attempted rendering of a template when the user
423 doesn't have permission
424 - NotFound (raised wherever it needs to be)
425 percolates up to the CGI interface that called the client
426 """
427 self.ok_message = []
428 self.error_message = []
429 try:
430 self.determine_charset()
431 self.determine_language()
433 try:
434 # make sure we're identified (even anonymously)
435 self.determine_user()
437 # figure out the context and desired content template
438 self.determine_context()
440 # possibly handle a form submit action (may change self.classname
441 # and self.template, and may also append error/ok_messages)
442 html = self.handle_action()
444 if html:
445 self.write_html(html)
446 return
448 # now render the page
449 # we don't want clients caching our dynamic pages
450 self.additional_headers['Cache-Control'] = 'no-cache'
451 # Pragma: no-cache makes Mozilla and its ilk
452 # double-load all pages!!
453 # self.additional_headers['Pragma'] = 'no-cache'
455 # pages with messages added expire right now
456 # simple views may be cached for a small amount of time
457 # TODO? make page expire time configurable
458 # <rj> always expire pages, as IE just doesn't seem to do the
459 # right thing here :(
460 date = time.time() - 1
461 #if self.error_message or self.ok_message:
462 # date = time.time() - 1
463 #else:
464 # date = time.time() + 5
465 self.additional_headers['Expires'] = rfc822.formatdate(date)
467 # render the content
468 self.write_html(self.renderContext())
469 except SendFile, designator:
470 # The call to serve_file may result in an Unauthorised
471 # exception or a NotModified exception. Those
472 # exceptions will be handled by the outermost set of
473 # exception handlers.
474 self.serve_file(designator)
475 except SendStaticFile, file:
476 self.serve_static_file(str(file))
477 except IOError:
478 # IOErrors here are due to the client disconnecting before
479 # recieving the reply.
480 pass
482 except SeriousError, message:
483 self.write_html(str(message))
484 except Redirect, url:
485 # let's redirect - if the url isn't None, then we need to do
486 # the headers, otherwise the headers have been set before the
487 # exception was raised
488 if url:
489 self.additional_headers['Location'] = str(url)
490 self.response_code = 302
491 self.write_html('Redirecting to <a href="%s">%s</a>'%(url, url))
492 except Unauthorised, message:
493 # users may always see the front page
494 self.response_code = 403
495 self.classname = self.nodeid = None
496 self.template = ''
497 self.error_message.append(message)
498 self.write_html(self.renderContext())
499 except NotModified:
500 # send the 304 response
501 self.response_code = 304
502 self.header()
503 except NotFound, e:
504 self.response_code = 404
505 self.template = '404'
506 try:
507 cl = self.db.getclass(self.classname)
508 self.write_html(self.renderContext())
509 except KeyError:
510 # we can't map the URL to a class we know about
511 # reraise the NotFound and let roundup_server
512 # handle it
513 raise NotFound, e
514 except FormError, e:
515 self.error_message.append(self._('Form Error: ') + str(e))
516 self.write_html(self.renderContext())
517 except:
518 if self.instance.config.WEB_DEBUG:
519 self.write_html(cgitb.html(i18n=self.translator))
520 else:
521 self.mailer.exception_message()
522 return self.write_html(self._(error_message))
524 def clean_sessions(self):
525 """Deprecated
526 XXX remove
527 """
528 self.clean_up()
530 def clean_up(self):
531 """Remove expired sessions and One Time Keys.
533 Do it only once an hour.
534 """
535 hour = 60*60
536 now = time.time()
538 # XXX: hack - use OTK table to store last_clean time information
539 # 'last_clean' string is used instead of otk key
540 last_clean = self.db.getOTKManager().get('last_clean', 'last_use', 0)
541 if now - last_clean < hour:
542 return
544 self.session_api.clean_up()
545 self.db.getOTKManager().clean()
546 self.db.getOTKManager().set('last_clean', last_use=now)
547 self.db.commit(fail_ok=True)
549 def determine_charset(self):
550 """Look for client charset in the form parameters or browser cookie.
552 If no charset requested by client, use storage charset (utf-8).
554 If the charset is found, and differs from the storage charset,
555 recode all form fields of type 'text/plain'
556 """
557 # look for client charset
558 charset_parameter = 0
559 if self.form.has_key('@charset'):
560 charset = self.form['@charset'].value
561 if charset.lower() == "none":
562 charset = ""
563 charset_parameter = 1
564 elif self.cookie.has_key('roundup_charset'):
565 charset = self.cookie['roundup_charset'].value
566 else:
567 charset = None
568 if charset:
569 # make sure the charset is recognized
570 try:
571 codecs.lookup(charset)
572 except LookupError:
573 self.error_message.append(self._('Unrecognized charset: %r')
574 % charset)
575 charset_parameter = 0
576 else:
577 self.charset = charset.lower()
578 # If we've got a character set in request parameters,
579 # set the browser cookie to keep the preference.
580 # This is done after codecs.lookup to make sure
581 # that we aren't keeping a wrong value.
582 if charset_parameter:
583 self.add_cookie('roundup_charset', charset)
585 # if client charset is different from the storage charset,
586 # recode form fields
587 # XXX this requires FieldStorage from Python library.
588 # mod_python FieldStorage is not supported!
589 if self.charset != self.STORAGE_CHARSET:
590 decoder = codecs.getdecoder(self.charset)
591 encoder = codecs.getencoder(self.STORAGE_CHARSET)
592 re_charref = re.compile('&#([0-9]+|x[0-9a-f]+);', re.IGNORECASE)
593 def _decode_charref(matchobj):
594 num = matchobj.group(1)
595 if num[0].lower() == 'x':
596 uc = int(num[1:], 16)
597 else:
598 uc = int(num)
599 return unichr(uc)
601 for field_name in self.form.keys():
602 field = self.form[field_name]
603 if (field.type == 'text/plain') and not field.filename:
604 try:
605 value = decoder(field.value)[0]
606 except UnicodeError:
607 continue
608 value = re_charref.sub(_decode_charref, value)
609 field.value = encoder(value)[0]
611 def determine_language(self):
612 """Determine the language"""
613 # look for language parameter
614 # then for language cookie
615 # last for the Accept-Language header
616 if self.form.has_key("@language"):
617 language = self.form["@language"].value
618 if language.lower() == "none":
619 language = ""
620 self.add_cookie("roundup_language", language)
621 elif self.cookie.has_key("roundup_language"):
622 language = self.cookie["roundup_language"].value
623 elif self.instance.config["WEB_USE_BROWSER_LANGUAGE"]:
624 hal = self.env.get('HTTP_ACCEPT_LANGUAGE')
625 language = accept_language.parse(hal)
626 else:
627 language = ""
629 self.language = language
630 if language:
631 self.setTranslator(TranslationService.get_translation(
632 language,
633 tracker_home=self.instance.config["TRACKER_HOME"]))
635 def determine_user(self):
636 """Determine who the user is"""
637 self.opendb('admin')
639 # get session data from db
640 # XXX: rename
641 self.session_api = Session(self)
643 # take the opportunity to cleanup expired sessions and otks
644 self.clean_up()
646 user = None
647 # first up, try http authorization if enabled
648 if self.instance.config['WEB_HTTP_AUTH']:
649 if self.env.has_key('REMOTE_USER'):
650 # we have external auth (e.g. by Apache)
651 user = self.env['REMOTE_USER']
652 elif self.env.get('HTTP_AUTHORIZATION', ''):
653 # try handling Basic Auth ourselves
654 auth = self.env['HTTP_AUTHORIZATION']
655 scheme, challenge = auth.split(' ', 1)
656 if scheme.lower() == 'basic':
657 try:
658 decoded = base64.decodestring(challenge)
659 except TypeError:
660 # invalid challenge
661 pass
662 username, password = decoded.split(':')
663 try:
664 login = self.get_action_class('login')(self)
665 login.verifyLogin(username, password)
666 except LoginError, err:
667 self.make_user_anonymous()
668 raise Unauthorised, err
669 user = username
671 # if user was not set by http authorization, try session lookup
672 if not user:
673 user = self.session_api.get('user')
674 if user:
675 # update session lifetime datestamp
676 self.session_api.update()
678 # if no user name set by http authorization or session lookup
679 # the user is anonymous
680 if not user:
681 user = 'anonymous'
683 # sanity check on the user still being valid,
684 # getting the userid at the same time
685 try:
686 self.userid = self.db.user.lookup(user)
687 except (KeyError, TypeError):
688 user = 'anonymous'
690 # make sure the anonymous user is valid if we're using it
691 if user == 'anonymous':
692 self.make_user_anonymous()
693 if not self.db.security.hasPermission('Web Access', self.userid):
694 raise Unauthorised, self._("Anonymous users are not "
695 "allowed to use the web interface")
696 else:
697 self.user = user
699 # reopen the database as the correct user
700 self.opendb(self.user)
702 def opendb(self, username):
703 """Open the database and set the current user.
705 Opens a database once. On subsequent calls only the user is set on
706 the database object the instance.optimize is set. If we are in
707 "Development Mode" (cf. roundup_server) then the database is always
708 re-opened.
709 """
710 # don't do anything if the db is open and the user has not changed
711 if hasattr(self, 'db') and self.db.isCurrentUser(username):
712 return
714 # open the database or only set the user
715 if not hasattr(self, 'db'):
716 self.db = self.instance.open(username)
717 else:
718 if self.instance.optimize:
719 self.db.setCurrentUser(username)
720 else:
721 self.db.close()
722 self.db = self.instance.open(username)
723 # The old session API refers to the closed database;
724 # we can no longer use it.
725 self.session_api = Session(self)
728 def determine_context(self, dre=re.compile(r'([^\d]+)0*(\d+)')):
729 """Determine the context of this page from the URL:
731 The URL path after the instance identifier is examined. The path
732 is generally only one entry long.
734 - if there is no path, then we are in the "home" context.
735 - if the path is "_file", then the additional path entry
736 specifies the filename of a static file we're to serve up
737 from the instance "html" directory. Raises a SendStaticFile
738 exception.(*)
739 - if there is something in the path (eg "issue"), it identifies
740 the tracker class we're to display.
741 - if the path is an item designator (eg "issue123"), then we're
742 to display a specific item.
743 - if the path starts with an item designator and is longer than
744 one entry, then we're assumed to be handling an item of a
745 FileClass, and the extra path information gives the filename
746 that the client is going to label the download with (ie
747 "file123/image.png" is nicer to download than "file123"). This
748 raises a SendFile exception.(*)
750 Both of the "*" types of contexts stop before we bother to
751 determine the template we're going to use. That's because they
752 don't actually use templates.
754 The template used is specified by the :template CGI variable,
755 which defaults to:
757 - only classname suplied: "index"
758 - full item designator supplied: "item"
760 We set:
762 self.classname - the class to display, can be None
764 self.template - the template to render the current context with
766 self.nodeid - the nodeid of the class we're displaying
767 """
768 # default the optional variables
769 self.classname = None
770 self.nodeid = None
772 # see if a template or messages are specified
773 template_override = ok_message = error_message = None
774 for key in self.form.keys():
775 if self.FV_TEMPLATE.match(key):
776 template_override = self.form[key].value
777 elif self.FV_OK_MESSAGE.match(key):
778 ok_message = self.form[key].value
779 ok_message = clean_message(ok_message)
780 elif self.FV_ERROR_MESSAGE.match(key):
781 error_message = self.form[key].value
782 error_message = clean_message(error_message)
784 # see if we were passed in a message
785 if ok_message:
786 self.ok_message.append(ok_message)
787 if error_message:
788 self.error_message.append(error_message)
790 # determine the classname and possibly nodeid
791 path = self.path.split('/')
792 if not path or path[0] in ('', 'home', 'index'):
793 if template_override is not None:
794 self.template = template_override
795 else:
796 self.template = ''
797 return
798 elif path[0] in ('_file', '@@file'):
799 raise SendStaticFile, os.path.join(*path[1:])
800 else:
801 self.classname = path[0]
802 if len(path) > 1:
803 # send the file identified by the designator in path[0]
804 raise SendFile, path[0]
806 # see if we got a designator
807 m = dre.match(self.classname)
808 if m:
809 self.classname = m.group(1)
810 self.nodeid = m.group(2)
811 try:
812 klass = self.db.getclass(self.classname)
813 except KeyError:
814 raise NotFound, '%s/%s'%(self.classname, self.nodeid)
815 if not klass.hasnode(self.nodeid):
816 raise NotFound, '%s/%s'%(self.classname, self.nodeid)
817 # with a designator, we default to item view
818 self.template = 'item'
819 else:
820 # with only a class, we default to index view
821 self.template = 'index'
823 # make sure the classname is valid
824 try:
825 self.db.getclass(self.classname)
826 except KeyError:
827 raise NotFound, self.classname
829 # see if we have a template override
830 if template_override is not None:
831 self.template = template_override
833 def serve_file(self, designator, dre=re.compile(r'([^\d]+)(\d+)')):
834 """ Serve the file from the content property of the designated item.
835 """
836 m = dre.match(str(designator))
837 if not m:
838 raise NotFound, str(designator)
839 classname, nodeid = m.group(1), m.group(2)
841 try:
842 klass = self.db.getclass(classname)
843 except KeyError:
844 # The classname was not valid.
845 raise NotFound, str(designator)
848 # make sure we have the appropriate properties
849 props = klass.getprops()
850 if not props.has_key('type'):
851 raise NotFound, designator
852 if not props.has_key('content'):
853 raise NotFound, designator
855 # make sure we have permission
856 if not self.db.security.hasPermission('View', self.userid,
857 classname, 'content', nodeid):
858 raise Unauthorised, self._("You are not allowed to view "
859 "this file.")
861 mime_type = klass.get(nodeid, 'type')
863 # if the mime_type is HTML-ish then make sure we're allowed to serve up
864 # HTML-ish content
865 if mime_type in ('text/html', 'text/x-html'):
866 if not self.instance.config['WEB_ALLOW_HTML_FILE']:
867 # do NOT serve the content up as HTML
868 mime_type = 'application/octet-stream'
870 # If this object is a file (i.e., an instance of FileClass),
871 # see if we can find it in the filesystem. If so, we may be
872 # able to use the more-efficient request.sendfile method of
873 # sending the file. If not, just get the "content" property
874 # in the usual way, and use that.
875 content = None
876 filename = None
877 if isinstance(klass, hyperdb.FileClass):
878 try:
879 filename = self.db.filename(classname, nodeid)
880 except AttributeError:
881 # The database doesn't store files in the filesystem
882 # and therefore doesn't provide the "filename" method.
883 pass
884 except IOError:
885 # The file does not exist.
886 pass
887 if not filename:
888 content = klass.get(nodeid, 'content')
890 lmt = klass.get(nodeid, 'activity').timestamp()
892 self._serve_file(lmt, mime_type, content, filename)
894 def serve_static_file(self, file):
895 """ Serve up the file named from the templates dir
896 """
897 # figure the filename - try STATIC_FILES, then TEMPLATES dir
898 for dir_option in ('STATIC_FILES', 'TEMPLATES'):
899 prefix = self.instance.config[dir_option]
900 if not prefix:
901 continue
902 # ensure the load doesn't try to poke outside
903 # of the static files directory
904 prefix = os.path.normpath(prefix)
905 filename = os.path.normpath(os.path.join(prefix, file))
906 if os.path.isfile(filename) and filename.startswith(prefix):
907 break
908 else:
909 raise NotFound, file
911 # last-modified time
912 lmt = os.stat(filename)[stat.ST_MTIME]
914 # detemine meta-type
915 file = str(file)
916 mime_type = mimetypes.guess_type(file)[0]
917 if not mime_type:
918 if file.endswith('.css'):
919 mime_type = 'text/css'
920 else:
921 mime_type = 'text/plain'
923 self._serve_file(lmt, mime_type, '', filename)
925 def _serve_file(self, lmt, mime_type, content=None, filename=None):
926 """ guts of serve_file() and serve_static_file()
927 """
929 # spit out headers
930 self.additional_headers['Content-Type'] = mime_type
931 self.additional_headers['Last-Modified'] = rfc822.formatdate(lmt)
933 ims = None
934 # see if there's an if-modified-since...
935 # XXX see which interfaces set this
936 #if hasattr(self.request, 'headers'):
937 #ims = self.request.headers.getheader('if-modified-since')
938 if self.env.has_key('HTTP_IF_MODIFIED_SINCE'):
939 # cgi will put the header in the env var
940 ims = self.env['HTTP_IF_MODIFIED_SINCE']
941 if ims:
942 ims = rfc822.parsedate(ims)[:6]
943 lmtt = time.gmtime(lmt)[:6]
944 if lmtt <= ims:
945 raise NotModified
947 if filename:
948 self.write_file(filename)
949 else:
950 self.additional_headers['Content-Length'] = str(len(content))
951 self.write(content)
953 def renderContext(self):
954 """ Return a PageTemplate for the named page
955 """
956 name = self.classname
957 extension = self.template
959 # catch errors so we can handle PT rendering errors more nicely
960 args = {
961 'ok_message': self.ok_message,
962 'error_message': self.error_message
963 }
964 try:
965 pt = self.instance.templates.get(name, extension)
966 # let the template render figure stuff out
967 result = pt.render(self, None, None, **args)
968 self.additional_headers['Content-Type'] = pt.content_type
969 if self.env.get('CGI_SHOW_TIMING', ''):
970 if self.env['CGI_SHOW_TIMING'].upper() == 'COMMENT':
971 timings = {'starttag': '<!-- ', 'endtag': ' -->'}
972 else:
973 timings = {'starttag': '<p>', 'endtag': '</p>'}
974 timings['seconds'] = time.time()-self.start
975 s = self._('%(starttag)sTime elapsed: %(seconds)fs%(endtag)s\n'
976 ) % timings
977 if hasattr(self.db, 'stats'):
978 timings.update(self.db.stats)
979 s += self._("%(starttag)sCache hits: %(cache_hits)d,"
980 " misses %(cache_misses)d."
981 " Loading items: %(get_items)f secs."
982 " Filtering: %(filtering)f secs."
983 "%(endtag)s\n") % timings
984 s += '</body>'
985 result = result.replace('</body>', s)
986 return result
987 except templating.NoTemplate, message:
988 return '<strong>%s</strong>'%message
989 except templating.Unauthorised, message:
990 raise Unauthorised, str(message)
991 except:
992 # everything else
993 if self.instance.config.WEB_DEBUG:
994 return cgitb.pt_html(i18n=self.translator)
995 exc_info = sys.exc_info()
996 try:
997 # If possible, send the HTML page template traceback
998 # to the administrator.
999 to = [self.mailer.config.ADMIN_EMAIL]
1000 subject = "Templating Error: %s" % exc_info[1]
1001 content = cgitb.pt_html()
1002 message = self.mailer.get_standard_message(to, subject)
1003 # delete existing content-type headers
1004 del message['Content-type']
1005 message['Content-type'] = 'text/html; charset=utf-8'
1006 message.set_payload(content)
1007 encode_quopri(message)
1008 self.mailer.smtp_send(to, str(message))
1009 # Now report the error to the user.
1010 return self._(error_message)
1011 except:
1012 # Reraise the original exception. The user will
1013 # receive an error message, and the adminstrator will
1014 # receive a traceback, albeit with less information
1015 # than the one we tried to generate above.
1016 raise exc_info[0], exc_info[1], exc_info[2]
1018 # these are the actions that are available
1019 actions = (
1020 ('edit', EditItemAction),
1021 ('editcsv', EditCSVAction),
1022 ('new', NewItemAction),
1023 ('register', RegisterAction),
1024 ('confrego', ConfRegoAction),
1025 ('passrst', PassResetAction),
1026 ('login', LoginAction),
1027 ('logout', LogoutAction),
1028 ('search', SearchAction),
1029 ('retire', RetireAction),
1030 ('show', ShowAction),
1031 ('export_csv', ExportCSVAction),
1032 )
1033 def handle_action(self):
1034 """ Determine whether there should be an Action called.
1036 The action is defined by the form variable :action which
1037 identifies the method on this object to call. The actions
1038 are defined in the "actions" sequence on this class.
1040 Actions may return a page (by default HTML) to return to the
1041 user, bypassing the usual template rendering.
1043 We explicitly catch Reject and ValueError exceptions and
1044 present their messages to the user.
1045 """
1046 if self.form.has_key(':action'):
1047 action = self.form[':action'].value.lower()
1048 elif self.form.has_key('@action'):
1049 action = self.form['@action'].value.lower()
1050 else:
1051 return None
1053 try:
1054 action_klass = self.get_action_class(action)
1056 # call the mapped action
1057 if isinstance(action_klass, type('')):
1058 # old way of specifying actions
1059 return getattr(self, action_klass)()
1060 else:
1061 return action_klass(self).execute()
1063 except (ValueError, Reject), err:
1064 self.error_message.append(str(err))
1066 def get_action_class(self, action_name):
1067 if (hasattr(self.instance, 'cgi_actions') and
1068 self.instance.cgi_actions.has_key(action_name)):
1069 # tracker-defined action
1070 action_klass = self.instance.cgi_actions[action_name]
1071 else:
1072 # go with a default
1073 for name, action_klass in self.actions:
1074 if name == action_name:
1075 break
1076 else:
1077 raise ValueError, 'No such action "%s"'%action_name
1078 return action_klass
1080 def _socket_op(self, call, *args, **kwargs):
1081 """Execute socket-related operation, catch common network errors
1083 Parameters:
1084 call: a callable to execute
1085 args, kwargs: call arguments
1087 """
1088 try:
1089 call(*args, **kwargs)
1090 except socket.error, err:
1091 err_errno = getattr (err, 'errno', None)
1092 if err_errno is None:
1093 try:
1094 err_errno = err[0]
1095 except TypeError:
1096 pass
1097 if err_errno not in self.IGNORE_NET_ERRORS:
1098 raise
1099 except IOError:
1100 # Apache's mod_python will raise IOError -- without an
1101 # accompanying errno -- when a write to the client fails.
1102 # A common case is that the client has closed the
1103 # connection. There's no way to be certain that this is
1104 # the situation that has occurred here, but that is the
1105 # most likely case.
1106 pass
1108 def write(self, content):
1109 if not self.headers_done:
1110 self.header()
1111 if self.env['REQUEST_METHOD'] != 'HEAD':
1112 self._socket_op(self.request.wfile.write, content)
1114 def write_html(self, content):
1115 if not self.headers_done:
1116 # at this point, we are sure about Content-Type
1117 if not self.additional_headers.has_key('Content-Type'):
1118 self.additional_headers['Content-Type'] = \
1119 'text/html; charset=%s' % self.charset
1120 self.header()
1122 if self.env['REQUEST_METHOD'] == 'HEAD':
1123 # client doesn't care about content
1124 return
1126 if self.charset != self.STORAGE_CHARSET:
1127 # recode output
1128 content = content.decode(self.STORAGE_CHARSET, 'replace')
1129 content = content.encode(self.charset, 'xmlcharrefreplace')
1131 # and write
1132 self._socket_op(self.request.wfile.write, content)
1134 def http_strip(self, content):
1135 """Remove HTTP Linear White Space from 'content'.
1137 'content' -- A string.
1139 returns -- 'content', with all leading and trailing LWS
1140 removed."""
1142 # RFC 2616 2.2: Basic Rules
1143 #
1144 # LWS = [CRLF] 1*( SP | HT )
1145 return content.strip(" \r\n\t")
1147 def http_split(self, content):
1148 """Split an HTTP list.
1150 'content' -- A string, giving a list of items.
1152 returns -- A sequence of strings, containing the elements of
1153 the list."""
1155 # RFC 2616 2.1: Augmented BNF
1156 #
1157 # Grammar productions of the form "#rule" indicate a
1158 # comma-separated list of elements matching "rule". LWS
1159 # is then removed from each element, and empty elements
1160 # removed.
1162 # Split at commas.
1163 elements = content.split(",")
1164 # Remove linear whitespace at either end of the string.
1165 elements = [self.http_strip(e) for e in elements]
1166 # Remove any now-empty elements.
1167 return [e for e in elements if e]
1169 def handle_range_header(self, length, etag):
1170 """Handle the 'Range' and 'If-Range' headers.
1172 'length' -- the length of the content available for the
1173 resource.
1175 'etag' -- the entity tag for this resources.
1177 returns -- If the request headers (including 'Range' and
1178 'If-Range') indicate that only a portion of the entity should
1179 be returned, then the return value is a pair '(offfset,
1180 length)' indicating the first byte and number of bytes of the
1181 content that should be returned to the client. In addition,
1182 this method will set 'self.response_code' to indicate Partial
1183 Content. In all other cases, the return value is 'None'. If
1184 appropriate, 'self.response_code' will be
1185 set to indicate 'REQUESTED_RANGE_NOT_SATISFIABLE'. In that
1186 case, the caller should not send any data to the client."""
1188 # RFC 2616 14.35: Range
1189 #
1190 # See if the Range header is present.
1191 ranges_specifier = self.env.get("HTTP_RANGE")
1192 if ranges_specifier is None:
1193 return None
1194 # RFC 2616 14.27: If-Range
1195 #
1196 # Check to see if there is an If-Range header.
1197 # Because the specification says:
1198 #
1199 # The If-Range header ... MUST be ignored if the request
1200 # does not include a Range header, we check for If-Range
1201 # after checking for Range.
1202 if_range = self.env.get("HTTP_IF_RANGE")
1203 if if_range:
1204 # The grammar for the If-Range header is:
1205 #
1206 # If-Range = "If-Range" ":" ( entity-tag | HTTP-date )
1207 # entity-tag = [ weak ] opaque-tag
1208 # weak = "W/"
1209 # opaque-tag = quoted-string
1210 #
1211 # We only support strong entity tags.
1212 if_range = self.http_strip(if_range)
1213 if (not if_range.startswith('"')
1214 or not if_range.endswith('"')):
1215 return None
1216 # If the condition doesn't match the entity tag, then we
1217 # must send the client the entire file.
1218 if if_range != etag:
1219 return
1220 # The grammar for the Range header value is:
1221 #
1222 # ranges-specifier = byte-ranges-specifier
1223 # byte-ranges-specifier = bytes-unit "=" byte-range-set
1224 # byte-range-set = 1#( byte-range-spec | suffix-byte-range-spec )
1225 # byte-range-spec = first-byte-pos "-" [last-byte-pos]
1226 # first-byte-pos = 1*DIGIT
1227 # last-byte-pos = 1*DIGIT
1228 # suffix-byte-range-spec = "-" suffix-length
1229 # suffix-length = 1*DIGIT
1230 #
1231 # Look for the "=" separating the units from the range set.
1232 specs = ranges_specifier.split("=", 1)
1233 if len(specs) != 2:
1234 return None
1235 # Check that the bytes-unit is in fact "bytes". If it is not,
1236 # we do not know how to process this range.
1237 bytes_unit = self.http_strip(specs[0])
1238 if bytes_unit != "bytes":
1239 return None
1240 # Seperate the range-set into range-specs.
1241 byte_range_set = self.http_strip(specs[1])
1242 byte_range_specs = self.http_split(byte_range_set)
1243 # We only handle exactly one range at this time.
1244 if len(byte_range_specs) != 1:
1245 return None
1246 # Parse the spec.
1247 byte_range_spec = byte_range_specs[0]
1248 pos = byte_range_spec.split("-", 1)
1249 if len(pos) != 2:
1250 return None
1251 # Get the first and last bytes.
1252 first = self.http_strip(pos[0])
1253 last = self.http_strip(pos[1])
1254 # We do not handle suffix ranges.
1255 if not first:
1256 return None
1257 # Convert the first and last positions to integers.
1258 try:
1259 first = int(first)
1260 if last:
1261 last = int(last)
1262 else:
1263 last = length - 1
1264 except:
1265 # The positions could not be parsed as integers.
1266 return None
1267 # Check that the range makes sense.
1268 if (first < 0 or last < 0 or last < first):
1269 return None
1270 if last >= length:
1271 # RFC 2616 10.4.17: 416 Requested Range Not Satisfiable
1272 #
1273 # If there is an If-Range header, RFC 2616 says that we
1274 # should just ignore the invalid Range header.
1275 if if_range:
1276 return None
1277 # Return code 416 with a Content-Range header giving the
1278 # allowable range.
1279 self.response_code = httplib.REQUESTED_RANGE_NOT_SATISFIABLE
1280 self.setHeader("Content-Range", "bytes */%d" % length)
1281 return None
1282 # RFC 2616 10.2.7: 206 Partial Content
1283 #
1284 # Tell the client that we are honoring the Range request by
1285 # indicating that we are providing partial content.
1286 self.response_code = httplib.PARTIAL_CONTENT
1287 # RFC 2616 14.16: Content-Range
1288 #
1289 # Tell the client what data we are providing.
1290 #
1291 # content-range-spec = byte-content-range-spec
1292 # byte-content-range-spec = bytes-unit SP
1293 # byte-range-resp-spec "/"
1294 # ( instance-length | "*" )
1295 # byte-range-resp-spec = (first-byte-pos "-" last-byte-pos)
1296 # | "*"
1297 # instance-length = 1 * DIGIT
1298 self.setHeader("Content-Range",
1299 "bytes %d-%d/%d" % (first, last, length))
1300 return (first, last - first + 1)
1302 def write_file(self, filename):
1303 """Send the contents of 'filename' to the user."""
1305 # Determine the length of the file.
1306 stat_info = os.stat(filename)
1307 length = stat_info[stat.ST_SIZE]
1308 # Assume we will return the entire file.
1309 offset = 0
1310 # If the headers have not already been finalized,
1311 if not self.headers_done:
1312 # RFC 2616 14.19: ETag
1313 #
1314 # Compute the entity tag, in a format similar to that
1315 # used by Apache.
1316 etag = '"%x-%x-%x"' % (stat_info[stat.ST_INO],
1317 length,
1318 stat_info[stat.ST_MTIME])
1319 self.setHeader("ETag", etag)
1320 # RFC 2616 14.5: Accept-Ranges
1321 #
1322 # Let the client know that we will accept range requests.
1323 self.setHeader("Accept-Ranges", "bytes")
1324 # RFC 2616 14.35: Range
1325 #
1326 # If there is a Range header, we may be able to avoid
1327 # sending the entire file.
1328 content_range = self.handle_range_header(length, etag)
1329 if content_range:
1330 offset, length = content_range
1331 # RFC 2616 14.13: Content-Length
1332 #
1333 # Tell the client how much data we are providing.
1334 self.setHeader("Content-Length", str(length))
1335 # Send the HTTP header.
1336 self.header()
1337 # If the client doesn't actually want the body, or if we are
1338 # indicating an invalid range.
1339 if (self.env['REQUEST_METHOD'] == 'HEAD'
1340 or self.response_code == httplib.REQUESTED_RANGE_NOT_SATISFIABLE):
1341 return
1342 # Use the optimized "sendfile" operation, if possible.
1343 if hasattr(self.request, "sendfile"):
1344 self._socket_op(self.request.sendfile, filename, offset, length)
1345 return
1346 # Fallback to the "write" operation.
1347 f = open(filename, 'rb')
1348 try:
1349 if offset:
1350 f.seek(offset)
1351 content = f.read(length)
1352 finally:
1353 f.close()
1354 self.write(content)
1356 def setHeader(self, header, value):
1357 """Override a header to be returned to the user's browser.
1358 """
1359 self.additional_headers[header] = value
1361 def header(self, headers=None, response=None):
1362 """Put up the appropriate header.
1363 """
1364 if headers is None:
1365 headers = {'Content-Type':'text/html; charset=utf-8'}
1366 if response is None:
1367 response = self.response_code
1369 # update with additional info
1370 headers.update(self.additional_headers)
1372 if headers.get('Content-Type', 'text/html') == 'text/html':
1373 headers['Content-Type'] = 'text/html; charset=utf-8'
1375 headers = headers.items()
1377 for ((path, name), (value, expire)) in self._cookies.items():
1378 cookie = "%s=%s; Path=%s;"%(name, value, path)
1379 if expire is not None:
1380 cookie += " expires=%s;"%Cookie._getdate(expire)
1381 headers.append(('Set-Cookie', cookie))
1383 self._socket_op(self.request.start_response, headers, response)
1385 self.headers_done = 1
1386 if self.debug:
1387 self.headers_sent = headers
1389 def add_cookie(self, name, value, expire=86400*365, path=None):
1390 """Set a cookie value to be sent in HTTP headers
1392 Parameters:
1393 name:
1394 cookie name
1395 value:
1396 cookie value
1397 expire:
1398 cookie expiration time (seconds).
1399 If value is empty (meaning "delete cookie"),
1400 expiration time is forced in the past
1401 and this argument is ignored.
1402 If None, the cookie will expire at end-of-session.
1403 If omitted, the cookie will be kept for a year.
1404 path:
1405 cookie path (optional)
1407 """
1408 if path is None:
1409 path = self.cookie_path
1410 if not value:
1411 expire = -1
1412 self._cookies[(path, name)] = (value, expire)
1414 def set_cookie(self, user, expire=None):
1415 """Deprecated. Use session_api calls directly
1417 XXX remove
1418 """
1420 # insert the session in the session db
1421 self.session_api.set(user=user)
1422 # refresh session cookie
1423 self.session_api.update(set_cookie=True, expire=expire)
1425 def make_user_anonymous(self):
1426 """ Make us anonymous
1428 This method used to handle non-existence of the 'anonymous'
1429 user, but that user is mandatory now.
1430 """
1431 self.userid = self.db.user.lookup('anonymous')
1432 self.user = 'anonymous'
1434 def standard_message(self, to, subject, body, author=None):
1435 """Send a standard email message from Roundup.
1437 "to" - recipients list
1438 "subject" - Subject
1439 "body" - Message
1440 "author" - (name, address) tuple or None for admin email
1442 Arguments are passed to the Mailer.standard_message code.
1443 """
1444 try:
1445 self.mailer.standard_message(to, subject, body, author)
1446 except MessageSendError, e:
1447 self.error_message.append(str(e))
1448 return 0
1449 return 1
1451 def parsePropsFromForm(self, create=0):
1452 return FormParser(self).parse(create=create)
1454 # vim: set et sts=4 sw=4 :