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 klass = self.db.getclass(classname)
843 # make sure we have the appropriate properties
844 props = klass.getprops()
845 if not props.has_key('type'):
846 raise NotFound, designator
847 if not props.has_key('content'):
848 raise NotFound, designator
850 # make sure we have permission
851 if not self.db.security.hasPermission('View', self.userid,
852 classname, 'content', nodeid):
853 raise Unauthorised, self._("You are not allowed to view "
854 "this file.")
856 mime_type = klass.get(nodeid, 'type')
858 # if the mime_type is HTML-ish then make sure we're allowed to serve up
859 # HTML-ish content
860 if mime_type in ('text/html', 'text/x-html'):
861 if not self.instance.config['WEB_ALLOW_HTML_FILE']:
862 # do NOT serve the content up as HTML
863 mime_type = 'application/octet-stream'
865 # If this object is a file (i.e., an instance of FileClass),
866 # see if we can find it in the filesystem. If so, we may be
867 # able to use the more-efficient request.sendfile method of
868 # sending the file. If not, just get the "content" property
869 # in the usual way, and use that.
870 content = None
871 filename = None
872 if isinstance(klass, hyperdb.FileClass):
873 try:
874 filename = self.db.filename(classname, nodeid)
875 except AttributeError:
876 # The database doesn't store files in the filesystem
877 # and therefore doesn't provide the "filename" method.
878 pass
879 except IOError:
880 # The file does not exist.
881 pass
882 if not filename:
883 content = klass.get(nodeid, 'content')
885 lmt = klass.get(nodeid, 'activity').timestamp()
887 self._serve_file(lmt, mime_type, content, filename)
889 def serve_static_file(self, file):
890 """ Serve up the file named from the templates dir
891 """
892 # figure the filename - try STATIC_FILES, then TEMPLATES dir
893 for dir_option in ('STATIC_FILES', 'TEMPLATES'):
894 prefix = self.instance.config[dir_option]
895 if not prefix:
896 continue
897 # ensure the load doesn't try to poke outside
898 # of the static files directory
899 prefix = os.path.normpath(prefix)
900 filename = os.path.normpath(os.path.join(prefix, file))
901 if os.path.isfile(filename) and filename.startswith(prefix):
902 break
903 else:
904 raise NotFound, file
906 # last-modified time
907 lmt = os.stat(filename)[stat.ST_MTIME]
909 # detemine meta-type
910 file = str(file)
911 mime_type = mimetypes.guess_type(file)[0]
912 if not mime_type:
913 if file.endswith('.css'):
914 mime_type = 'text/css'
915 else:
916 mime_type = 'text/plain'
918 self._serve_file(lmt, mime_type, '', filename)
920 def _serve_file(self, lmt, mime_type, content=None, filename=None):
921 """ guts of serve_file() and serve_static_file()
922 """
924 # spit out headers
925 self.additional_headers['Content-Type'] = mime_type
926 self.additional_headers['Last-Modified'] = rfc822.formatdate(lmt)
928 ims = None
929 # see if there's an if-modified-since...
930 # XXX see which interfaces set this
931 #if hasattr(self.request, 'headers'):
932 #ims = self.request.headers.getheader('if-modified-since')
933 if self.env.has_key('HTTP_IF_MODIFIED_SINCE'):
934 # cgi will put the header in the env var
935 ims = self.env['HTTP_IF_MODIFIED_SINCE']
936 if ims:
937 ims = rfc822.parsedate(ims)[:6]
938 lmtt = time.gmtime(lmt)[:6]
939 if lmtt <= ims:
940 raise NotModified
942 if filename:
943 self.write_file(filename)
944 else:
945 self.additional_headers['Content-Length'] = str(len(content))
946 self.write(content)
948 def renderContext(self):
949 """ Return a PageTemplate for the named page
950 """
951 name = self.classname
952 extension = self.template
954 # catch errors so we can handle PT rendering errors more nicely
955 args = {
956 'ok_message': self.ok_message,
957 'error_message': self.error_message
958 }
959 try:
960 pt = self.instance.templates.get(name, extension)
961 # let the template render figure stuff out
962 result = pt.render(self, None, None, **args)
963 self.additional_headers['Content-Type'] = pt.content_type
964 if self.env.get('CGI_SHOW_TIMING', ''):
965 if self.env['CGI_SHOW_TIMING'].upper() == 'COMMENT':
966 timings = {'starttag': '<!-- ', 'endtag': ' -->'}
967 else:
968 timings = {'starttag': '<p>', 'endtag': '</p>'}
969 timings['seconds'] = time.time()-self.start
970 s = self._('%(starttag)sTime elapsed: %(seconds)fs%(endtag)s\n'
971 ) % timings
972 if hasattr(self.db, 'stats'):
973 timings.update(self.db.stats)
974 s += self._("%(starttag)sCache hits: %(cache_hits)d,"
975 " misses %(cache_misses)d."
976 " Loading items: %(get_items)f secs."
977 " Filtering: %(filtering)f secs."
978 "%(endtag)s\n") % timings
979 s += '</body>'
980 result = result.replace('</body>', s)
981 return result
982 except templating.NoTemplate, message:
983 return '<strong>%s</strong>'%message
984 except templating.Unauthorised, message:
985 raise Unauthorised, str(message)
986 except:
987 # everything else
988 if self.instance.config.WEB_DEBUG:
989 return cgitb.pt_html(i18n=self.translator)
990 exc_info = sys.exc_info()
991 try:
992 # If possible, send the HTML page template traceback
993 # to the administrator.
994 to = [self.mailer.config.ADMIN_EMAIL]
995 subject = "Templating Error: %s" % exc_info[1]
996 content = cgitb.pt_html()
997 message = self.mailer.get_standard_message(to, subject)
998 # delete existing content-type headers
999 del message['Content-type']
1000 message['Content-type'] = 'text/html; charset=utf-8'
1001 message.set_payload(content)
1002 encode_quopri(message)
1003 self.mailer.smtp_send(to, str(message))
1004 # Now report the error to the user.
1005 return self._(error_message)
1006 except:
1007 # Reraise the original exception. The user will
1008 # receive an error message, and the adminstrator will
1009 # receive a traceback, albeit with less information
1010 # than the one we tried to generate above.
1011 raise exc_info[0], exc_info[1], exc_info[2]
1013 # these are the actions that are available
1014 actions = (
1015 ('edit', EditItemAction),
1016 ('editcsv', EditCSVAction),
1017 ('new', NewItemAction),
1018 ('register', RegisterAction),
1019 ('confrego', ConfRegoAction),
1020 ('passrst', PassResetAction),
1021 ('login', LoginAction),
1022 ('logout', LogoutAction),
1023 ('search', SearchAction),
1024 ('retire', RetireAction),
1025 ('show', ShowAction),
1026 ('export_csv', ExportCSVAction),
1027 )
1028 def handle_action(self):
1029 """ Determine whether there should be an Action called.
1031 The action is defined by the form variable :action which
1032 identifies the method on this object to call. The actions
1033 are defined in the "actions" sequence on this class.
1035 Actions may return a page (by default HTML) to return to the
1036 user, bypassing the usual template rendering.
1038 We explicitly catch Reject and ValueError exceptions and
1039 present their messages to the user.
1040 """
1041 if self.form.has_key(':action'):
1042 action = self.form[':action'].value.lower()
1043 elif self.form.has_key('@action'):
1044 action = self.form['@action'].value.lower()
1045 else:
1046 return None
1048 try:
1049 action_klass = self.get_action_class(action)
1051 # call the mapped action
1052 if isinstance(action_klass, type('')):
1053 # old way of specifying actions
1054 return getattr(self, action_klass)()
1055 else:
1056 return action_klass(self).execute()
1058 except (ValueError, Reject), err:
1059 self.error_message.append(str(err))
1061 def get_action_class(self, action_name):
1062 if (hasattr(self.instance, 'cgi_actions') and
1063 self.instance.cgi_actions.has_key(action_name)):
1064 # tracker-defined action
1065 action_klass = self.instance.cgi_actions[action_name]
1066 else:
1067 # go with a default
1068 for name, action_klass in self.actions:
1069 if name == action_name:
1070 break
1071 else:
1072 raise ValueError, 'No such action "%s"'%action_name
1073 return action_klass
1075 def _socket_op(self, call, *args, **kwargs):
1076 """Execute socket-related operation, catch common network errors
1078 Parameters:
1079 call: a callable to execute
1080 args, kwargs: call arguments
1082 """
1083 try:
1084 call(*args, **kwargs)
1085 except socket.error, err:
1086 err_errno = getattr (err, 'errno', None)
1087 if err_errno is None:
1088 try:
1089 err_errno = err[0]
1090 except TypeError:
1091 pass
1092 if err_errno not in self.IGNORE_NET_ERRORS:
1093 raise
1094 except IOError:
1095 # Apache's mod_python will raise IOError -- without an
1096 # accompanying errno -- when a write to the client fails.
1097 # A common case is that the client has closed the
1098 # connection. There's no way to be certain that this is
1099 # the situation that has occurred here, but that is the
1100 # most likely case.
1101 pass
1103 def write(self, content):
1104 if not self.headers_done:
1105 self.header()
1106 if self.env['REQUEST_METHOD'] != 'HEAD':
1107 self._socket_op(self.request.wfile.write, content)
1109 def write_html(self, content):
1110 if not self.headers_done:
1111 # at this point, we are sure about Content-Type
1112 if not self.additional_headers.has_key('Content-Type'):
1113 self.additional_headers['Content-Type'] = \
1114 'text/html; charset=%s' % self.charset
1115 self.header()
1117 if self.env['REQUEST_METHOD'] == 'HEAD':
1118 # client doesn't care about content
1119 return
1121 if self.charset != self.STORAGE_CHARSET:
1122 # recode output
1123 content = content.decode(self.STORAGE_CHARSET, 'replace')
1124 content = content.encode(self.charset, 'xmlcharrefreplace')
1126 # and write
1127 self._socket_op(self.request.wfile.write, content)
1129 def http_strip(self, content):
1130 """Remove HTTP Linear White Space from 'content'.
1132 'content' -- A string.
1134 returns -- 'content', with all leading and trailing LWS
1135 removed."""
1137 # RFC 2616 2.2: Basic Rules
1138 #
1139 # LWS = [CRLF] 1*( SP | HT )
1140 return content.strip(" \r\n\t")
1142 def http_split(self, content):
1143 """Split an HTTP list.
1145 'content' -- A string, giving a list of items.
1147 returns -- A sequence of strings, containing the elements of
1148 the list."""
1150 # RFC 2616 2.1: Augmented BNF
1151 #
1152 # Grammar productions of the form "#rule" indicate a
1153 # comma-separated list of elements matching "rule". LWS
1154 # is then removed from each element, and empty elements
1155 # removed.
1157 # Split at commas.
1158 elements = content.split(",")
1159 # Remove linear whitespace at either end of the string.
1160 elements = [self.http_strip(e) for e in elements]
1161 # Remove any now-empty elements.
1162 return [e for e in elements if e]
1164 def handle_range_header(self, length, etag):
1165 """Handle the 'Range' and 'If-Range' headers.
1167 'length' -- the length of the content available for the
1168 resource.
1170 'etag' -- the entity tag for this resources.
1172 returns -- If the request headers (including 'Range' and
1173 'If-Range') indicate that only a portion of the entity should
1174 be returned, then the return value is a pair '(offfset,
1175 length)' indicating the first byte and number of bytes of the
1176 content that should be returned to the client. In addition,
1177 this method will set 'self.response_code' to indicate Partial
1178 Content. In all other cases, the return value is 'None'. If
1179 appropriate, 'self.response_code' will be
1180 set to indicate 'REQUESTED_RANGE_NOT_SATISFIABLE'. In that
1181 case, the caller should not send any data to the client."""
1183 # RFC 2616 14.35: Range
1184 #
1185 # See if the Range header is present.
1186 ranges_specifier = self.env.get("HTTP_RANGE")
1187 if ranges_specifier is None:
1188 return None
1189 # RFC 2616 14.27: If-Range
1190 #
1191 # Check to see if there is an If-Range header.
1192 # Because the specification says:
1193 #
1194 # The If-Range header ... MUST be ignored if the request
1195 # does not include a Range header, we check for If-Range
1196 # after checking for Range.
1197 if_range = self.env.get("HTTP_IF_RANGE")
1198 if if_range:
1199 # The grammar for the If-Range header is:
1200 #
1201 # If-Range = "If-Range" ":" ( entity-tag | HTTP-date )
1202 # entity-tag = [ weak ] opaque-tag
1203 # weak = "W/"
1204 # opaque-tag = quoted-string
1205 #
1206 # We only support strong entity tags.
1207 if_range = self.http_strip(if_range)
1208 if (not if_range.startswith('"')
1209 or not if_range.endswith('"')):
1210 return None
1211 # If the condition doesn't match the entity tag, then we
1212 # must send the client the entire file.
1213 if if_range != etag:
1214 return
1215 # The grammar for the Range header value is:
1216 #
1217 # ranges-specifier = byte-ranges-specifier
1218 # byte-ranges-specifier = bytes-unit "=" byte-range-set
1219 # byte-range-set = 1#( byte-range-spec | suffix-byte-range-spec )
1220 # byte-range-spec = first-byte-pos "-" [last-byte-pos]
1221 # first-byte-pos = 1*DIGIT
1222 # last-byte-pos = 1*DIGIT
1223 # suffix-byte-range-spec = "-" suffix-length
1224 # suffix-length = 1*DIGIT
1225 #
1226 # Look for the "=" separating the units from the range set.
1227 specs = ranges_specifier.split("=", 1)
1228 if len(specs) != 2:
1229 return None
1230 # Check that the bytes-unit is in fact "bytes". If it is not,
1231 # we do not know how to process this range.
1232 bytes_unit = self.http_strip(specs[0])
1233 if bytes_unit != "bytes":
1234 return None
1235 # Seperate the range-set into range-specs.
1236 byte_range_set = self.http_strip(specs[1])
1237 byte_range_specs = self.http_split(byte_range_set)
1238 # We only handle exactly one range at this time.
1239 if len(byte_range_specs) != 1:
1240 return None
1241 # Parse the spec.
1242 byte_range_spec = byte_range_specs[0]
1243 pos = byte_range_spec.split("-", 1)
1244 if len(pos) != 2:
1245 return None
1246 # Get the first and last bytes.
1247 first = self.http_strip(pos[0])
1248 last = self.http_strip(pos[1])
1249 # We do not handle suffix ranges.
1250 if not first:
1251 return None
1252 # Convert the first and last positions to integers.
1253 try:
1254 first = int(first)
1255 if last:
1256 last = int(last)
1257 else:
1258 last = length - 1
1259 except:
1260 # The positions could not be parsed as integers.
1261 return None
1262 # Check that the range makes sense.
1263 if (first < 0 or last < 0 or last < first):
1264 return None
1265 if last >= length:
1266 # RFC 2616 10.4.17: 416 Requested Range Not Satisfiable
1267 #
1268 # If there is an If-Range header, RFC 2616 says that we
1269 # should just ignore the invalid Range header.
1270 if if_range:
1271 return None
1272 # Return code 416 with a Content-Range header giving the
1273 # allowable range.
1274 self.response_code = httplib.REQUESTED_RANGE_NOT_SATISFIABLE
1275 self.setHeader("Content-Range", "bytes */%d" % length)
1276 return None
1277 # RFC 2616 10.2.7: 206 Partial Content
1278 #
1279 # Tell the client that we are honoring the Range request by
1280 # indicating that we are providing partial content.
1281 self.response_code = httplib.PARTIAL_CONTENT
1282 # RFC 2616 14.16: Content-Range
1283 #
1284 # Tell the client what data we are providing.
1285 #
1286 # content-range-spec = byte-content-range-spec
1287 # byte-content-range-spec = bytes-unit SP
1288 # byte-range-resp-spec "/"
1289 # ( instance-length | "*" )
1290 # byte-range-resp-spec = (first-byte-pos "-" last-byte-pos)
1291 # | "*"
1292 # instance-length = 1 * DIGIT
1293 self.setHeader("Content-Range",
1294 "bytes %d-%d/%d" % (first, last, length))
1295 return (first, last - first + 1)
1297 def write_file(self, filename):
1298 """Send the contents of 'filename' to the user."""
1300 # Determine the length of the file.
1301 stat_info = os.stat(filename)
1302 length = stat_info[stat.ST_SIZE]
1303 # Assume we will return the entire file.
1304 offset = 0
1305 # If the headers have not already been finalized,
1306 if not self.headers_done:
1307 # RFC 2616 14.19: ETag
1308 #
1309 # Compute the entity tag, in a format similar to that
1310 # used by Apache.
1311 etag = '"%x-%x-%x"' % (stat_info[stat.ST_INO],
1312 length,
1313 stat_info[stat.ST_MTIME])
1314 self.setHeader("ETag", etag)
1315 # RFC 2616 14.5: Accept-Ranges
1316 #
1317 # Let the client know that we will accept range requests.
1318 self.setHeader("Accept-Ranges", "bytes")
1319 # RFC 2616 14.35: Range
1320 #
1321 # If there is a Range header, we may be able to avoid
1322 # sending the entire file.
1323 content_range = self.handle_range_header(length, etag)
1324 if content_range:
1325 offset, length = content_range
1326 # RFC 2616 14.13: Content-Length
1327 #
1328 # Tell the client how much data we are providing.
1329 self.setHeader("Content-Length", str(length))
1330 # Send the HTTP header.
1331 self.header()
1332 # If the client doesn't actually want the body, or if we are
1333 # indicating an invalid range.
1334 if (self.env['REQUEST_METHOD'] == 'HEAD'
1335 or self.response_code == httplib.REQUESTED_RANGE_NOT_SATISFIABLE):
1336 return
1337 # Use the optimized "sendfile" operation, if possible.
1338 if hasattr(self.request, "sendfile"):
1339 self._socket_op(self.request.sendfile, filename, offset, length)
1340 return
1341 # Fallback to the "write" operation.
1342 f = open(filename, 'rb')
1343 try:
1344 if offset:
1345 f.seek(offset)
1346 content = f.read(length)
1347 finally:
1348 f.close()
1349 self.write(content)
1351 def setHeader(self, header, value):
1352 """Override a header to be returned to the user's browser.
1353 """
1354 self.additional_headers[header] = value
1356 def header(self, headers=None, response=None):
1357 """Put up the appropriate header.
1358 """
1359 if headers is None:
1360 headers = {'Content-Type':'text/html; charset=utf-8'}
1361 if response is None:
1362 response = self.response_code
1364 # update with additional info
1365 headers.update(self.additional_headers)
1367 if headers.get('Content-Type', 'text/html') == 'text/html':
1368 headers['Content-Type'] = 'text/html; charset=utf-8'
1370 headers = headers.items()
1372 for ((path, name), (value, expire)) in self._cookies.items():
1373 cookie = "%s=%s; Path=%s;"%(name, value, path)
1374 if expire is not None:
1375 cookie += " expires=%s;"%Cookie._getdate(expire)
1376 headers.append(('Set-Cookie', cookie))
1378 self._socket_op(self.request.start_response, headers, response)
1380 self.headers_done = 1
1381 if self.debug:
1382 self.headers_sent = headers
1384 def add_cookie(self, name, value, expire=86400*365, path=None):
1385 """Set a cookie value to be sent in HTTP headers
1387 Parameters:
1388 name:
1389 cookie name
1390 value:
1391 cookie value
1392 expire:
1393 cookie expiration time (seconds).
1394 If value is empty (meaning "delete cookie"),
1395 expiration time is forced in the past
1396 and this argument is ignored.
1397 If None, the cookie will expire at end-of-session.
1398 If omitted, the cookie will be kept for a year.
1399 path:
1400 cookie path (optional)
1402 """
1403 if path is None:
1404 path = self.cookie_path
1405 if not value:
1406 expire = -1
1407 self._cookies[(path, name)] = (value, expire)
1409 def set_cookie(self, user, expire=None):
1410 """Deprecated. Use session_api calls directly
1412 XXX remove
1413 """
1415 # insert the session in the session db
1416 self.session_api.set(user=user)
1417 # refresh session cookie
1418 self.session_api.update(set_cookie=True, expire=expire)
1420 def make_user_anonymous(self):
1421 """ Make us anonymous
1423 This method used to handle non-existence of the 'anonymous'
1424 user, but that user is mandatory now.
1425 """
1426 self.userid = self.db.user.lookup('anonymous')
1427 self.user = 'anonymous'
1429 def standard_message(self, to, subject, body, author=None):
1430 """Send a standard email message from Roundup.
1432 "to" - recipients list
1433 "subject" - Subject
1434 "body" - Message
1435 "author" - (name, address) tuple or None for admin email
1437 Arguments are passed to the Mailer.standard_message code.
1438 """
1439 try:
1440 self.mailer.standard_message(to, subject, body, author)
1441 except MessageSendError, e:
1442 self.error_message.append(str(e))
1443 return 0
1444 return 1
1446 def parsePropsFromForm(self, create=0):
1447 return FormParser(self).parse(create=create)
1449 # vim: set et sts=4 sw=4 :