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
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)
390 self.db.commit()
392 self.setHeader("Content-Type", "text/xml")
393 self.setHeader("Content-Length", str(len(output)))
394 self.write(output)
396 def inner_main(self):
397 """Process a request.
399 The most common requests are handled like so:
401 1. look for charset and language preferences, set up user locale
402 see determine_charset, determine_language
403 2. figure out who we are, defaulting to the "anonymous" user
404 see determine_user
405 3. figure out what the request is for - the context
406 see determine_context
407 4. handle any requested action (item edit, search, ...)
408 see handle_action
409 5. render a template, resulting in HTML output
411 In some situations, exceptions occur:
413 - HTTP Redirect (generally raised by an action)
414 - SendFile (generally raised by determine_context)
415 serve up a FileClass "content" property
416 - SendStaticFile (generally raised by determine_context)
417 serve up a file from the tracker "html" directory
418 - Unauthorised (generally raised by an action)
419 the action is cancelled, the request is rendered and an error
420 message is displayed indicating that permission was not
421 granted for the action to take place
422 - templating.Unauthorised (templating action not permitted)
423 raised by an attempted rendering of a template when the user
424 doesn't have permission
425 - NotFound (raised wherever it needs to be)
426 percolates up to the CGI interface that called the client
427 """
428 self.ok_message = []
429 self.error_message = []
430 try:
431 self.determine_charset()
432 self.determine_language()
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 double-load all pages!!
452 # self.additional_headers['Pragma'] = 'no-cache'
454 # pages with messages added expire right now
455 # simple views may be cached for a small amount of time
456 # TODO? make page expire time configurable
457 # <rj> always expire pages, as IE just doesn't seem to do the
458 # right thing here :(
459 date = time.time() - 1
460 #if self.error_message or self.ok_message:
461 # date = time.time() - 1
462 #else:
463 # date = time.time() + 5
464 self.additional_headers['Expires'] = rfc822.formatdate(date)
466 # render the content
467 try:
468 self.write_html(self.renderContext())
469 except IOError:
470 # IOErrors here are due to the client disconnecting before
471 # recieving the reply.
472 pass
474 except SeriousError, message:
475 self.write_html(str(message))
476 except Redirect, url:
477 # let's redirect - if the url isn't None, then we need to do
478 # the headers, otherwise the headers have been set before the
479 # exception was raised
480 if url:
481 self.additional_headers['Location'] = str(url)
482 self.response_code = 302
483 self.write_html('Redirecting to <a href="%s">%s</a>'%(url, url))
484 except SendFile, designator:
485 try:
486 self.serve_file(designator)
487 except NotModified:
488 # send the 304 response
489 self.response_code = 304
490 self.header()
491 except SendStaticFile, file:
492 try:
493 self.serve_static_file(str(file))
494 except NotModified:
495 # send the 304 response
496 self.response_code = 304
497 self.header()
498 except Unauthorised, message:
499 # users may always see the front page
500 self.response_code = 403
501 self.classname = self.nodeid = None
502 self.template = ''
503 self.error_message.append(message)
504 self.write_html(self.renderContext())
505 except NotFound, e:
506 self.response_code = 404
507 self.template = '404'
508 try:
509 cl = self.db.getclass(self.classname)
510 self.write_html(self.renderContext())
511 except KeyError:
512 # we can't map the URL to a class we know about
513 # reraise the NotFound and let roundup_server
514 # handle it
515 raise NotFound, e
516 except FormError, e:
517 self.error_message.append(self._('Form Error: ') + str(e))
518 self.write_html(self.renderContext())
519 except:
520 if self.instance.config.WEB_DEBUG:
521 self.write_html(cgitb.html(i18n=self.translator))
522 else:
523 self.mailer.exception_message()
524 return self.write_html(self._(error_message))
526 def clean_sessions(self):
527 """Deprecated
528 XXX remove
529 """
530 self.clean_up()
532 def clean_up(self):
533 """Remove expired sessions and One Time Keys.
535 Do it only once an hour.
536 """
537 hour = 60*60
538 now = time.time()
540 # XXX: hack - use OTK table to store last_clean time information
541 # 'last_clean' string is used instead of otk key
542 last_clean = self.db.getOTKManager().get('last_clean', 'last_use', 0)
543 if now - last_clean < hour:
544 return
546 self.session_api.clean_up()
547 self.db.getOTKManager().clean()
548 self.db.getOTKManager().set('last_clean', last_use=now)
549 self.db.commit(fail_ok=True)
551 def determine_charset(self):
552 """Look for client charset in the form parameters or browser cookie.
554 If no charset requested by client, use storage charset (utf-8).
556 If the charset is found, and differs from the storage charset,
557 recode all form fields of type 'text/plain'
558 """
559 # look for client charset
560 charset_parameter = 0
561 if self.form.has_key('@charset'):
562 charset = self.form['@charset'].value
563 if charset.lower() == "none":
564 charset = ""
565 charset_parameter = 1
566 elif self.cookie.has_key('roundup_charset'):
567 charset = self.cookie['roundup_charset'].value
568 else:
569 charset = None
570 if charset:
571 # make sure the charset is recognized
572 try:
573 codecs.lookup(charset)
574 except LookupError:
575 self.error_message.append(self._('Unrecognized charset: %r')
576 % charset)
577 charset_parameter = 0
578 else:
579 self.charset = charset.lower()
580 # If we've got a character set in request parameters,
581 # set the browser cookie to keep the preference.
582 # This is done after codecs.lookup to make sure
583 # that we aren't keeping a wrong value.
584 if charset_parameter:
585 self.add_cookie('roundup_charset', charset)
587 # if client charset is different from the storage charset,
588 # recode form fields
589 # XXX this requires FieldStorage from Python library.
590 # mod_python FieldStorage is not supported!
591 if self.charset != self.STORAGE_CHARSET:
592 decoder = codecs.getdecoder(self.charset)
593 encoder = codecs.getencoder(self.STORAGE_CHARSET)
594 re_charref = re.compile('&#([0-9]+|x[0-9a-f]+);', re.IGNORECASE)
595 def _decode_charref(matchobj):
596 num = matchobj.group(1)
597 if num[0].lower() == 'x':
598 uc = int(num[1:], 16)
599 else:
600 uc = int(num)
601 return unichr(uc)
603 for field_name in self.form.keys():
604 field = self.form[field_name]
605 if (field.type == 'text/plain') and not field.filename:
606 try:
607 value = decoder(field.value)[0]
608 except UnicodeError:
609 continue
610 value = re_charref.sub(_decode_charref, value)
611 field.value = encoder(value)[0]
613 def determine_language(self):
614 """Determine the language"""
615 # look for language parameter
616 # then for language cookie
617 # last for the Accept-Language header
618 if self.form.has_key("@language"):
619 language = self.form["@language"].value
620 if language.lower() == "none":
621 language = ""
622 self.add_cookie("roundup_language", language)
623 elif self.cookie.has_key("roundup_language"):
624 language = self.cookie["roundup_language"].value
625 elif self.instance.config["WEB_USE_BROWSER_LANGUAGE"]:
626 hal = self.env.get('HTTP_ACCEPT_LANGUAGE')
627 language = accept_language.parse(hal)
628 else:
629 language = ""
631 self.language = language
632 if language:
633 self.setTranslator(TranslationService.get_translation(
634 language,
635 tracker_home=self.instance.config["TRACKER_HOME"]))
637 def determine_user(self):
638 """Determine who the user is"""
639 self.opendb('admin')
641 # get session data from db
642 # XXX: rename
643 self.session_api = Session(self)
645 # take the opportunity to cleanup expired sessions and otks
646 self.clean_up()
648 user = None
649 # first up, try http authorization if enabled
650 if self.instance.config['WEB_HTTP_AUTH']:
651 if self.env.has_key('REMOTE_USER'):
652 # we have external auth (e.g. by Apache)
653 user = self.env['REMOTE_USER']
654 elif self.env.get('HTTP_AUTHORIZATION', ''):
655 # try handling Basic Auth ourselves
656 auth = self.env['HTTP_AUTHORIZATION']
657 scheme, challenge = auth.split(' ', 1)
658 if scheme.lower() == 'basic':
659 try:
660 decoded = base64.decodestring(challenge)
661 except TypeError:
662 # invalid challenge
663 pass
664 username, password = decoded.split(':')
665 try:
666 login = self.get_action_class('login')(self)
667 login.verifyLogin(username, password)
668 except LoginError, err:
669 self.make_user_anonymous()
670 raise Unauthorised, err
671 user = username
673 # if user was not set by http authorization, try session lookup
674 if not user:
675 user = self.session_api.get('user')
676 if user:
677 # update session lifetime datestamp
678 self.session_api.update()
680 # if no user name set by http authorization or session lookup
681 # the user is anonymous
682 if not user:
683 user = 'anonymous'
685 # sanity check on the user still being valid,
686 # getting the userid at the same time
687 try:
688 self.userid = self.db.user.lookup(user)
689 except (KeyError, TypeError):
690 user = 'anonymous'
692 # make sure the anonymous user is valid if we're using it
693 if user == 'anonymous':
694 self.make_user_anonymous()
695 if not self.db.security.hasPermission('Web Access', self.userid):
696 raise Unauthorised, self._("Anonymous users are not "
697 "allowed to use the web interface")
698 else:
699 self.user = user
701 # reopen the database as the correct user
702 self.opendb(self.user)
704 def opendb(self, username):
705 """Open the database and set the current user.
707 Opens a database once. On subsequent calls only the user is set on
708 the database object the instance.optimize is set. If we are in
709 "Development Mode" (cf. roundup_server) then the database is always
710 re-opened.
711 """
712 # don't do anything if the db is open and the user has not changed
713 if hasattr(self, 'db') and self.db.isCurrentUser(username):
714 return
716 # open the database or only set the user
717 if not hasattr(self, 'db'):
718 self.db = self.instance.open(username)
719 else:
720 if self.instance.optimize:
721 self.db.setCurrentUser(username)
722 else:
723 self.db.close()
724 self.db = self.instance.open(username)
726 def determine_context(self, dre=re.compile(r'([^\d]+)0*(\d+)')):
727 """Determine the context of this page from the URL:
729 The URL path after the instance identifier is examined. The path
730 is generally only one entry long.
732 - if there is no path, then we are in the "home" context.
733 - if the path is "_file", then the additional path entry
734 specifies the filename of a static file we're to serve up
735 from the instance "html" directory. Raises a SendStaticFile
736 exception.(*)
737 - if there is something in the path (eg "issue"), it identifies
738 the tracker class we're to display.
739 - if the path is an item designator (eg "issue123"), then we're
740 to display a specific item.
741 - if the path starts with an item designator and is longer than
742 one entry, then we're assumed to be handling an item of a
743 FileClass, and the extra path information gives the filename
744 that the client is going to label the download with (ie
745 "file123/image.png" is nicer to download than "file123"). This
746 raises a SendFile exception.(*)
748 Both of the "*" types of contexts stop before we bother to
749 determine the template we're going to use. That's because they
750 don't actually use templates.
752 The template used is specified by the :template CGI variable,
753 which defaults to:
755 - only classname suplied: "index"
756 - full item designator supplied: "item"
758 We set:
760 self.classname - the class to display, can be None
762 self.template - the template to render the current context with
764 self.nodeid - the nodeid of the class we're displaying
765 """
766 # default the optional variables
767 self.classname = None
768 self.nodeid = None
770 # see if a template or messages are specified
771 template_override = ok_message = error_message = None
772 for key in self.form.keys():
773 if self.FV_TEMPLATE.match(key):
774 template_override = self.form[key].value
775 elif self.FV_OK_MESSAGE.match(key):
776 ok_message = self.form[key].value
777 ok_message = clean_message(ok_message)
778 elif self.FV_ERROR_MESSAGE.match(key):
779 error_message = self.form[key].value
780 error_message = clean_message(error_message)
782 # see if we were passed in a message
783 if ok_message:
784 self.ok_message.append(ok_message)
785 if error_message:
786 self.error_message.append(error_message)
788 # determine the classname and possibly nodeid
789 path = self.path.split('/')
790 if not path or path[0] in ('', 'home', 'index'):
791 if template_override is not None:
792 self.template = template_override
793 else:
794 self.template = ''
795 return
796 elif path[0] in ('_file', '@@file'):
797 raise SendStaticFile, os.path.join(*path[1:])
798 else:
799 self.classname = path[0]
800 if len(path) > 1:
801 # send the file identified by the designator in path[0]
802 raise SendFile, path[0]
804 # see if we got a designator
805 m = dre.match(self.classname)
806 if m:
807 self.classname = m.group(1)
808 self.nodeid = m.group(2)
809 try:
810 klass = self.db.getclass(self.classname)
811 except KeyError:
812 raise NotFound, '%s/%s'%(self.classname, self.nodeid)
813 if not klass.hasnode(self.nodeid):
814 raise NotFound, '%s/%s'%(self.classname, self.nodeid)
815 # with a designator, we default to item view
816 self.template = 'item'
817 else:
818 # with only a class, we default to index view
819 self.template = 'index'
821 # make sure the classname is valid
822 try:
823 self.db.getclass(self.classname)
824 except KeyError:
825 raise NotFound, self.classname
827 # see if we have a template override
828 if template_override is not None:
829 self.template = template_override
831 def serve_file(self, designator, dre=re.compile(r'([^\d]+)(\d+)')):
832 """ Serve the file from the content property of the designated item.
833 """
834 m = dre.match(str(designator))
835 if not m:
836 raise NotFound, str(designator)
837 classname, nodeid = m.group(1), m.group(2)
839 klass = self.db.getclass(classname)
841 # make sure we have the appropriate properties
842 props = klass.getprops()
843 if not props.has_key('type'):
844 raise NotFound, designator
845 if not props.has_key('content'):
846 raise NotFound, designator
848 # make sure we have permission
849 if not self.db.security.hasPermission('View', self.userid,
850 classname, 'content', nodeid):
851 raise Unauthorised, self._("You are not allowed to view "
852 "this file.")
854 mime_type = klass.get(nodeid, 'type')
856 # If this object is a file (i.e., an instance of FileClass),
857 # see if we can find it in the filesystem. If so, we may be
858 # able to use the more-efficient request.sendfile method of
859 # sending the file. If not, just get the "content" property
860 # in the usual way, and use that.
861 content = None
862 filename = None
863 if isinstance(klass, hyperdb.FileClass):
864 try:
865 filename = self.db.filename(classname, nodeid)
866 except AttributeError:
867 # The database doesn't store files in the filesystem
868 # and therefore doesn't provide the "filename" method.
869 pass
870 except IOError:
871 # The file does not exist.
872 pass
873 if not filename:
874 content = klass.get(nodeid, 'content')
876 lmt = klass.get(nodeid, 'activity').timestamp()
878 self._serve_file(lmt, mime_type, content, filename)
880 def serve_static_file(self, file):
881 """ Serve up the file named from the templates dir
882 """
883 # figure the filename - try STATIC_FILES, then TEMPLATES dir
884 for dir_option in ('STATIC_FILES', 'TEMPLATES'):
885 prefix = self.instance.config[dir_option]
886 if not prefix:
887 continue
888 # ensure the load doesn't try to poke outside
889 # of the static files directory
890 prefix = os.path.normpath(prefix)
891 filename = os.path.normpath(os.path.join(prefix, file))
892 if os.path.isfile(filename) and filename.startswith(prefix):
893 break
894 else:
895 raise NotFound, file
897 # last-modified time
898 lmt = os.stat(filename)[stat.ST_MTIME]
900 # detemine meta-type
901 file = str(file)
902 mime_type = mimetypes.guess_type(file)[0]
903 if not mime_type:
904 if file.endswith('.css'):
905 mime_type = 'text/css'
906 else:
907 mime_type = 'text/plain'
909 self._serve_file(lmt, mime_type, '', filename)
911 def _serve_file(self, lmt, mime_type, content=None, filename=None):
912 """ guts of serve_file() and serve_static_file()
913 """
915 # spit out headers
916 self.additional_headers['Content-Type'] = mime_type
917 self.additional_headers['Last-Modified'] = rfc822.formatdate(lmt)
919 ims = None
920 # see if there's an if-modified-since...
921 # XXX see which interfaces set this
922 #if hasattr(self.request, 'headers'):
923 #ims = self.request.headers.getheader('if-modified-since')
924 if self.env.has_key('HTTP_IF_MODIFIED_SINCE'):
925 # cgi will put the header in the env var
926 ims = self.env['HTTP_IF_MODIFIED_SINCE']
927 if ims:
928 ims = rfc822.parsedate(ims)[:6]
929 lmtt = time.gmtime(lmt)[:6]
930 if lmtt <= ims:
931 raise NotModified
933 if filename:
934 self.write_file(filename)
935 else:
936 self.additional_headers['Content-Length'] = str(len(content))
937 self.write(content)
939 def renderContext(self):
940 """ Return a PageTemplate for the named page
941 """
942 name = self.classname
943 extension = self.template
945 # catch errors so we can handle PT rendering errors more nicely
946 args = {
947 'ok_message': self.ok_message,
948 'error_message': self.error_message
949 }
950 try:
951 pt = self.instance.templates.get(name, extension)
952 # let the template render figure stuff out
953 result = pt.render(self, None, None, **args)
954 self.additional_headers['Content-Type'] = pt.content_type
955 if self.env.get('CGI_SHOW_TIMING', ''):
956 if self.env['CGI_SHOW_TIMING'].upper() == 'COMMENT':
957 timings = {'starttag': '<!-- ', 'endtag': ' -->'}
958 else:
959 timings = {'starttag': '<p>', 'endtag': '</p>'}
960 timings['seconds'] = time.time()-self.start
961 s = self._('%(starttag)sTime elapsed: %(seconds)fs%(endtag)s\n'
962 ) % timings
963 if hasattr(self.db, 'stats'):
964 timings.update(self.db.stats)
965 s += self._("%(starttag)sCache hits: %(cache_hits)d,"
966 " misses %(cache_misses)d."
967 " Loading items: %(get_items)f secs."
968 " Filtering: %(filtering)f secs."
969 "%(endtag)s\n") % timings
970 s += '</body>'
971 result = result.replace('</body>', s)
972 return result
973 except templating.NoTemplate, message:
974 return '<strong>%s</strong>'%message
975 except templating.Unauthorised, message:
976 raise Unauthorised, str(message)
977 except:
978 # everything else
979 if self.instance.config.WEB_DEBUG:
980 return cgitb.pt_html(i18n=self.translator)
981 exc_info = sys.exc_info()
982 try:
983 # If possible, send the HTML page template traceback
984 # to the administrator.
985 to = [self.mailer.config.ADMIN_EMAIL]
986 subject = "Templating Error: %s" % exc_info[1]
987 content = cgitb.pt_html()
988 message, writer = self.mailer.get_standard_message(
989 to, subject)
990 writer.addheader('Content-Transfer-Encoding', 'quoted-printable')
991 body = writer.startbody('text/html; charset=utf-8')
992 content = StringIO(content)
993 quopri.encode(content, body, 0)
994 self.mailer.smtp_send(to, message)
995 # Now report the error to the user.
996 return self._(error_message)
997 except:
998 # Reraise the original exception. The user will
999 # receive an error message, and the adminstrator will
1000 # receive a traceback, albeit with less information
1001 # than the one we tried to generate above.
1002 raise exc_info[0], exc_info[1], exc_info[2]
1004 # these are the actions that are available
1005 actions = (
1006 ('edit', EditItemAction),
1007 ('editcsv', EditCSVAction),
1008 ('new', NewItemAction),
1009 ('register', RegisterAction),
1010 ('confrego', ConfRegoAction),
1011 ('passrst', PassResetAction),
1012 ('login', LoginAction),
1013 ('logout', LogoutAction),
1014 ('search', SearchAction),
1015 ('retire', RetireAction),
1016 ('show', ShowAction),
1017 ('export_csv', ExportCSVAction),
1018 )
1019 def handle_action(self):
1020 """ Determine whether there should be an Action called.
1022 The action is defined by the form variable :action which
1023 identifies the method on this object to call. The actions
1024 are defined in the "actions" sequence on this class.
1026 Actions may return a page (by default HTML) to return to the
1027 user, bypassing the usual template rendering.
1029 We explicitly catch Reject and ValueError exceptions and
1030 present their messages to the user.
1031 """
1032 if self.form.has_key(':action'):
1033 action = self.form[':action'].value.lower()
1034 elif self.form.has_key('@action'):
1035 action = self.form['@action'].value.lower()
1036 else:
1037 return None
1039 try:
1040 action_klass = self.get_action_class(action)
1042 # call the mapped action
1043 if isinstance(action_klass, type('')):
1044 # old way of specifying actions
1045 return getattr(self, action_klass)()
1046 else:
1047 return action_klass(self).execute()
1049 except (ValueError, Reject), err:
1050 self.error_message.append(str(err))
1052 def get_action_class(self, action_name):
1053 if (hasattr(self.instance, 'cgi_actions') and
1054 self.instance.cgi_actions.has_key(action_name)):
1055 # tracker-defined action
1056 action_klass = self.instance.cgi_actions[action_name]
1057 else:
1058 # go with a default
1059 for name, action_klass in self.actions:
1060 if name == action_name:
1061 break
1062 else:
1063 raise ValueError, 'No such action "%s"'%action_name
1064 return action_klass
1066 def _socket_op(self, call, *args, **kwargs):
1067 """Execute socket-related operation, catch common network errors
1069 Parameters:
1070 call: a callable to execute
1071 args, kwargs: call arguments
1073 """
1074 try:
1075 call(*args, **kwargs)
1076 except socket.error, err:
1077 err_errno = getattr (err, 'errno', None)
1078 if err_errno is None:
1079 try:
1080 err_errno = err[0]
1081 except TypeError:
1082 pass
1083 if err_errno not in self.IGNORE_NET_ERRORS:
1084 raise
1085 except IOError:
1086 # Apache's mod_python will raise IOError -- without an
1087 # accompanying errno -- when a write to the client fails.
1088 # A common case is that the client has closed the
1089 # connection. There's no way to be certain that this is
1090 # the situation that has occurred here, but that is the
1091 # most likely case.
1092 pass
1094 def write(self, content):
1095 if not self.headers_done:
1096 self.header()
1097 if self.env['REQUEST_METHOD'] != 'HEAD':
1098 self._socket_op(self.request.wfile.write, content)
1100 def write_html(self, content):
1101 if not self.headers_done:
1102 # at this point, we are sure about Content-Type
1103 if not self.additional_headers.has_key('Content-Type'):
1104 self.additional_headers['Content-Type'] = \
1105 'text/html; charset=%s' % self.charset
1106 self.header()
1108 if self.env['REQUEST_METHOD'] == 'HEAD':
1109 # client doesn't care about content
1110 return
1112 if self.charset != self.STORAGE_CHARSET:
1113 # recode output
1114 content = content.decode(self.STORAGE_CHARSET, 'replace')
1115 content = content.encode(self.charset, 'xmlcharrefreplace')
1117 # and write
1118 self._socket_op(self.request.wfile.write, content)
1120 def http_strip(self, content):
1121 """Remove HTTP Linear White Space from 'content'.
1123 'content' -- A string.
1125 returns -- 'content', with all leading and trailing LWS
1126 removed."""
1128 # RFC 2616 2.2: Basic Rules
1129 #
1130 # LWS = [CRLF] 1*( SP | HT )
1131 return content.strip(" \r\n\t")
1133 def http_split(self, content):
1134 """Split an HTTP list.
1136 'content' -- A string, giving a list of items.
1138 returns -- A sequence of strings, containing the elements of
1139 the list."""
1141 # RFC 2616 2.1: Augmented BNF
1142 #
1143 # Grammar productions of the form "#rule" indicate a
1144 # comma-separated list of elements matching "rule". LWS
1145 # is then removed from each element, and empty elements
1146 # removed.
1148 # Split at commas.
1149 elements = content.split(",")
1150 # Remove linear whitespace at either end of the string.
1151 elements = [self.http_strip(e) for e in elements]
1152 # Remove any now-empty elements.
1153 return [e for e in elements if e]
1155 def handle_range_header(self, length, etag):
1156 """Handle the 'Range' and 'If-Range' headers.
1158 'length' -- the length of the content available for the
1159 resource.
1161 'etag' -- the entity tag for this resources.
1163 returns -- If the request headers (including 'Range' and
1164 'If-Range') indicate that only a portion of the entity should
1165 be returned, then the return value is a pair '(offfset,
1166 length)' indicating the first byte and number of bytes of the
1167 content that should be returned to the client. In addition,
1168 this method will set 'self.response_code' to indicate Partial
1169 Content. In all other cases, the return value is 'None'. If
1170 appropriate, 'self.response_code' will be
1171 set to indicate 'REQUESTED_RANGE_NOT_SATISFIABLE'. In that
1172 case, the caller should not send any data to the client."""
1174 # RFC 2616 14.35: Range
1175 #
1176 # See if the Range header is present.
1177 ranges_specifier = self.env.get("HTTP_RANGE")
1178 if ranges_specifier is None:
1179 return None
1180 # RFC 2616 14.27: If-Range
1181 #
1182 # Check to see if there is an If-Range header.
1183 # Because the specification says:
1184 #
1185 # The If-Range header ... MUST be ignored if the request
1186 # does not include a Range header, we check for If-Range
1187 # after checking for Range.
1188 if_range = self.env.get("HTTP_IF_RANGE")
1189 if if_range:
1190 # The grammar for the If-Range header is:
1191 #
1192 # If-Range = "If-Range" ":" ( entity-tag | HTTP-date )
1193 # entity-tag = [ weak ] opaque-tag
1194 # weak = "W/"
1195 # opaque-tag = quoted-string
1196 #
1197 # We only support strong entity tags.
1198 if_range = self.http_strip(if_range)
1199 if (not if_range.startswith('"')
1200 or not if_range.endswith('"')):
1201 return None
1202 # If the condition doesn't match the entity tag, then we
1203 # must send the client the entire file.
1204 if if_range != etag:
1205 return
1206 # The grammar for the Range header value is:
1207 #
1208 # ranges-specifier = byte-ranges-specifier
1209 # byte-ranges-specifier = bytes-unit "=" byte-range-set
1210 # byte-range-set = 1#( byte-range-spec | suffix-byte-range-spec )
1211 # byte-range-spec = first-byte-pos "-" [last-byte-pos]
1212 # first-byte-pos = 1*DIGIT
1213 # last-byte-pos = 1*DIGIT
1214 # suffix-byte-range-spec = "-" suffix-length
1215 # suffix-length = 1*DIGIT
1216 #
1217 # Look for the "=" separating the units from the range set.
1218 specs = ranges_specifier.split("=", 1)
1219 if len(specs) != 2:
1220 return None
1221 # Check that the bytes-unit is in fact "bytes". If it is not,
1222 # we do not know how to process this range.
1223 bytes_unit = self.http_strip(specs[0])
1224 if bytes_unit != "bytes":
1225 return None
1226 # Seperate the range-set into range-specs.
1227 byte_range_set = self.http_strip(specs[1])
1228 byte_range_specs = self.http_split(byte_range_set)
1229 # We only handle exactly one range at this time.
1230 if len(byte_range_specs) != 1:
1231 return None
1232 # Parse the spec.
1233 byte_range_spec = byte_range_specs[0]
1234 pos = byte_range_spec.split("-", 1)
1235 if len(pos) != 2:
1236 return None
1237 # Get the first and last bytes.
1238 first = self.http_strip(pos[0])
1239 last = self.http_strip(pos[1])
1240 # We do not handle suffix ranges.
1241 if not first:
1242 return None
1243 # Convert the first and last positions to integers.
1244 try:
1245 first = int(first)
1246 if last:
1247 last = int(last)
1248 else:
1249 last = length - 1
1250 except:
1251 # The positions could not be parsed as integers.
1252 return None
1253 # Check that the range makes sense.
1254 if (first < 0 or last < 0 or last < first):
1255 return None
1256 if last >= length:
1257 # RFC 2616 10.4.17: 416 Requested Range Not Satisfiable
1258 #
1259 # If there is an If-Range header, RFC 2616 says that we
1260 # should just ignore the invalid Range header.
1261 if if_range:
1262 return None
1263 # Return code 416 with a Content-Range header giving the
1264 # allowable range.
1265 self.response_code = httplib.REQUESTED_RANGE_NOT_SATISFIABLE
1266 self.setHeader("Content-Range", "bytes */%d" % length)
1267 return None
1268 # RFC 2616 10.2.7: 206 Partial Content
1269 #
1270 # Tell the client that we are honoring the Range request by
1271 # indicating that we are providing partial content.
1272 self.response_code = httplib.PARTIAL_CONTENT
1273 # RFC 2616 14.16: Content-Range
1274 #
1275 # Tell the client what data we are providing.
1276 #
1277 # content-range-spec = byte-content-range-spec
1278 # byte-content-range-spec = bytes-unit SP
1279 # byte-range-resp-spec "/"
1280 # ( instance-length | "*" )
1281 # byte-range-resp-spec = (first-byte-pos "-" last-byte-pos)
1282 # | "*"
1283 # instance-length = 1 * DIGIT
1284 self.setHeader("Content-Range",
1285 "bytes %d-%d/%d" % (first, last, length))
1286 return (first, last - first + 1)
1288 def write_file(self, filename):
1289 """Send the contents of 'filename' to the user."""
1291 # Determine the length of the file.
1292 stat_info = os.stat(filename)
1293 length = stat_info[stat.ST_SIZE]
1294 # Assume we will return the entire file.
1295 offset = 0
1296 # If the headers have not already been finalized,
1297 if not self.headers_done:
1298 # RFC 2616 14.19: ETag
1299 #
1300 # Compute the entity tag, in a format similar to that
1301 # used by Apache.
1302 etag = '"%x-%x-%x"' % (stat_info[stat.ST_INO],
1303 length,
1304 stat_info[stat.ST_MTIME])
1305 self.setHeader("ETag", etag)
1306 # RFC 2616 14.5: Accept-Ranges
1307 #
1308 # Let the client know that we will accept range requests.
1309 self.setHeader("Accept-Ranges", "bytes")
1310 # RFC 2616 14.35: Range
1311 #
1312 # If there is a Range header, we may be able to avoid
1313 # sending the entire file.
1314 content_range = self.handle_range_header(length, etag)
1315 if content_range:
1316 offset, length = content_range
1317 # RFC 2616 14.13: Content-Length
1318 #
1319 # Tell the client how much data we are providing.
1320 self.setHeader("Content-Length", length)
1321 # Send the HTTP header.
1322 self.header()
1323 # If the client doesn't actually want the body, or if we are
1324 # indicating an invalid range.
1325 if (self.env['REQUEST_METHOD'] == 'HEAD'
1326 or self.response_code == httplib.REQUESTED_RANGE_NOT_SATISFIABLE):
1327 return
1328 # Use the optimized "sendfile" operation, if possible.
1329 if hasattr(self.request, "sendfile"):
1330 self._socket_op(self.request.sendfile, filename, offset, length)
1331 return
1332 # Fallback to the "write" operation.
1333 f = open(filename, 'rb')
1334 try:
1335 if offset:
1336 f.seek(offset)
1337 content = f.read(length)
1338 finally:
1339 f.close()
1340 self.write(content)
1342 def setHeader(self, header, value):
1343 """Override a header to be returned to the user's browser.
1344 """
1345 self.additional_headers[header] = value
1347 def header(self, headers=None, response=None):
1348 """Put up the appropriate header.
1349 """
1350 if headers is None:
1351 headers = {'Content-Type':'text/html; charset=utf-8'}
1352 if response is None:
1353 response = self.response_code
1355 # update with additional info
1356 headers.update(self.additional_headers)
1358 if headers.get('Content-Type', 'text/html') == 'text/html':
1359 headers['Content-Type'] = 'text/html; charset=utf-8'
1361 headers = headers.items()
1363 for ((path, name), (value, expire)) in self._cookies.items():
1364 cookie = "%s=%s; Path=%s;"%(name, value, path)
1365 if expire is not None:
1366 cookie += " expires=%s;"%Cookie._getdate(expire)
1367 headers.append(('Set-Cookie', cookie))
1369 self._socket_op(self.request.start_response, headers, response)
1371 self.headers_done = 1
1372 if self.debug:
1373 self.headers_sent = headers
1375 def add_cookie(self, name, value, expire=86400*365, path=None):
1376 """Set a cookie value to be sent in HTTP headers
1378 Parameters:
1379 name:
1380 cookie name
1381 value:
1382 cookie value
1383 expire:
1384 cookie expiration time (seconds).
1385 If value is empty (meaning "delete cookie"),
1386 expiration time is forced in the past
1387 and this argument is ignored.
1388 If None, the cookie will expire at end-of-session.
1389 If omitted, the cookie will be kept for a year.
1390 path:
1391 cookie path (optional)
1393 """
1394 if path is None:
1395 path = self.cookie_path
1396 if not value:
1397 expire = -1
1398 self._cookies[(path, name)] = (value, expire)
1400 def set_cookie(self, user, expire=None):
1401 """Deprecated. Use session_api calls directly
1403 XXX remove
1404 """
1406 # insert the session in the session db
1407 self.session_api.set(user=user)
1408 # refresh session cookie
1409 self.session_api.update(set_cookie=True, expire=expire)
1411 def make_user_anonymous(self):
1412 """ Make us anonymous
1414 This method used to handle non-existence of the 'anonymous'
1415 user, but that user is mandatory now.
1416 """
1417 self.userid = self.db.user.lookup('anonymous')
1418 self.user = 'anonymous'
1420 def standard_message(self, to, subject, body, author=None):
1421 """Send a standard email message from Roundup.
1423 "to" - recipients list
1424 "subject" - Subject
1425 "body" - Message
1426 "author" - (name, address) tuple or None for admin email
1428 Arguments are passed to the Mailer.standard_message code.
1429 """
1430 try:
1431 self.mailer.standard_message(to, subject, body, author)
1432 except MessageSendError, e:
1433 self.error_message.append(str(e))
1434 return 0
1435 return 1
1437 def parsePropsFromForm(self, create=0):
1438 return FormParser(self).parse(create=create)
1440 # vim: set et sts=4 sw=4 :