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 try:
435 # make sure we're identified (even anonymously)
436 self.determine_user()
438 # figure out the context and desired content template
439 self.determine_context()
441 # possibly handle a form submit action (may change self.classname
442 # and self.template, and may also append error/ok_messages)
443 html = self.handle_action()
445 if html:
446 self.write_html(html)
447 return
449 # now render the page
450 # we don't want clients caching our dynamic pages
451 self.additional_headers['Cache-Control'] = 'no-cache'
452 # Pragma: no-cache makes Mozilla and its ilk
453 # double-load all pages!!
454 # self.additional_headers['Pragma'] = 'no-cache'
456 # pages with messages added expire right now
457 # simple views may be cached for a small amount of time
458 # TODO? make page expire time configurable
459 # <rj> always expire pages, as IE just doesn't seem to do the
460 # right thing here :(
461 date = time.time() - 1
462 #if self.error_message or self.ok_message:
463 # date = time.time() - 1
464 #else:
465 # date = time.time() + 5
466 self.additional_headers['Expires'] = rfc822.formatdate(date)
468 # render the content
469 self.write_html(self.renderContext())
470 except SendFile, designator:
471 # The call to serve_file may result in an Unauthorised
472 # exception or a NotModified exception. Those
473 # exceptions will be handled by the outermost set of
474 # exception handlers.
475 self.serve_file(designator)
476 except SendStaticFile, file:
477 self.serve_static_file(str(file))
478 except IOError:
479 # IOErrors here are due to the client disconnecting before
480 # recieving the reply.
481 pass
483 except SeriousError, message:
484 self.write_html(str(message))
485 except Redirect, url:
486 # let's redirect - if the url isn't None, then we need to do
487 # the headers, otherwise the headers have been set before the
488 # exception was raised
489 if url:
490 self.additional_headers['Location'] = str(url)
491 self.response_code = 302
492 self.write_html('Redirecting to <a href="%s">%s</a>'%(url, url))
493 except Unauthorised, message:
494 # users may always see the front page
495 self.response_code = 403
496 self.classname = self.nodeid = None
497 self.template = ''
498 self.error_message.append(message)
499 self.write_html(self.renderContext())
500 except NotModified:
501 # send the 304 response
502 self.response_code = 304
503 self.header()
504 except NotFound, e:
505 self.response_code = 404
506 self.template = '404'
507 try:
508 cl = self.db.getclass(self.classname)
509 self.write_html(self.renderContext())
510 except KeyError:
511 # we can't map the URL to a class we know about
512 # reraise the NotFound and let roundup_server
513 # handle it
514 raise NotFound, e
515 except FormError, e:
516 self.error_message.append(self._('Form Error: ') + str(e))
517 self.write_html(self.renderContext())
518 except:
519 if self.instance.config.WEB_DEBUG:
520 self.write_html(cgitb.html(i18n=self.translator))
521 else:
522 self.mailer.exception_message()
523 return self.write_html(self._(error_message))
525 def clean_sessions(self):
526 """Deprecated
527 XXX remove
528 """
529 self.clean_up()
531 def clean_up(self):
532 """Remove expired sessions and One Time Keys.
534 Do it only once an hour.
535 """
536 hour = 60*60
537 now = time.time()
539 # XXX: hack - use OTK table to store last_clean time information
540 # 'last_clean' string is used instead of otk key
541 last_clean = self.db.getOTKManager().get('last_clean', 'last_use', 0)
542 if now - last_clean < hour:
543 return
545 self.session_api.clean_up()
546 self.db.getOTKManager().clean()
547 self.db.getOTKManager().set('last_clean', last_use=now)
548 self.db.commit(fail_ok=True)
550 def determine_charset(self):
551 """Look for client charset in the form parameters or browser cookie.
553 If no charset requested by client, use storage charset (utf-8).
555 If the charset is found, and differs from the storage charset,
556 recode all form fields of type 'text/plain'
557 """
558 # look for client charset
559 charset_parameter = 0
560 if self.form.has_key('@charset'):
561 charset = self.form['@charset'].value
562 if charset.lower() == "none":
563 charset = ""
564 charset_parameter = 1
565 elif self.cookie.has_key('roundup_charset'):
566 charset = self.cookie['roundup_charset'].value
567 else:
568 charset = None
569 if charset:
570 # make sure the charset is recognized
571 try:
572 codecs.lookup(charset)
573 except LookupError:
574 self.error_message.append(self._('Unrecognized charset: %r')
575 % charset)
576 charset_parameter = 0
577 else:
578 self.charset = charset.lower()
579 # If we've got a character set in request parameters,
580 # set the browser cookie to keep the preference.
581 # This is done after codecs.lookup to make sure
582 # that we aren't keeping a wrong value.
583 if charset_parameter:
584 self.add_cookie('roundup_charset', charset)
586 # if client charset is different from the storage charset,
587 # recode form fields
588 # XXX this requires FieldStorage from Python library.
589 # mod_python FieldStorage is not supported!
590 if self.charset != self.STORAGE_CHARSET:
591 decoder = codecs.getdecoder(self.charset)
592 encoder = codecs.getencoder(self.STORAGE_CHARSET)
593 re_charref = re.compile('&#([0-9]+|x[0-9a-f]+);', re.IGNORECASE)
594 def _decode_charref(matchobj):
595 num = matchobj.group(1)
596 if num[0].lower() == 'x':
597 uc = int(num[1:], 16)
598 else:
599 uc = int(num)
600 return unichr(uc)
602 for field_name in self.form.keys():
603 field = self.form[field_name]
604 if (field.type == 'text/plain') and not field.filename:
605 try:
606 value = decoder(field.value)[0]
607 except UnicodeError:
608 continue
609 value = re_charref.sub(_decode_charref, value)
610 field.value = encoder(value)[0]
612 def determine_language(self):
613 """Determine the language"""
614 # look for language parameter
615 # then for language cookie
616 # last for the Accept-Language header
617 if self.form.has_key("@language"):
618 language = self.form["@language"].value
619 if language.lower() == "none":
620 language = ""
621 self.add_cookie("roundup_language", language)
622 elif self.cookie.has_key("roundup_language"):
623 language = self.cookie["roundup_language"].value
624 elif self.instance.config["WEB_USE_BROWSER_LANGUAGE"]:
625 hal = self.env.get('HTTP_ACCEPT_LANGUAGE')
626 language = accept_language.parse(hal)
627 else:
628 language = ""
630 self.language = language
631 if language:
632 self.setTranslator(TranslationService.get_translation(
633 language,
634 tracker_home=self.instance.config["TRACKER_HOME"]))
636 def determine_user(self):
637 """Determine who the user is"""
638 self.opendb('admin')
640 # get session data from db
641 # XXX: rename
642 self.session_api = Session(self)
644 # take the opportunity to cleanup expired sessions and otks
645 self.clean_up()
647 user = None
648 # first up, try http authorization if enabled
649 if self.instance.config['WEB_HTTP_AUTH']:
650 if self.env.has_key('REMOTE_USER'):
651 # we have external auth (e.g. by Apache)
652 user = self.env['REMOTE_USER']
653 elif self.env.get('HTTP_AUTHORIZATION', ''):
654 # try handling Basic Auth ourselves
655 auth = self.env['HTTP_AUTHORIZATION']
656 scheme, challenge = auth.split(' ', 1)
657 if scheme.lower() == 'basic':
658 try:
659 decoded = base64.decodestring(challenge)
660 except TypeError:
661 # invalid challenge
662 pass
663 username, password = decoded.split(':')
664 try:
665 login = self.get_action_class('login')(self)
666 login.verifyLogin(username, password)
667 except LoginError, err:
668 self.make_user_anonymous()
669 raise Unauthorised, err
670 user = username
672 # if user was not set by http authorization, try session lookup
673 if not user:
674 user = self.session_api.get('user')
675 if user:
676 # update session lifetime datestamp
677 self.session_api.update()
679 # if no user name set by http authorization or session lookup
680 # the user is anonymous
681 if not user:
682 user = 'anonymous'
684 # sanity check on the user still being valid,
685 # getting the userid at the same time
686 try:
687 self.userid = self.db.user.lookup(user)
688 except (KeyError, TypeError):
689 user = 'anonymous'
691 # make sure the anonymous user is valid if we're using it
692 if user == 'anonymous':
693 self.make_user_anonymous()
694 if not self.db.security.hasPermission('Web Access', self.userid):
695 raise Unauthorised, self._("Anonymous users are not "
696 "allowed to use the web interface")
697 else:
698 self.user = user
700 # reopen the database as the correct user
701 self.opendb(self.user)
703 def opendb(self, username):
704 """Open the database and set the current user.
706 Opens a database once. On subsequent calls only the user is set on
707 the database object the instance.optimize is set. If we are in
708 "Development Mode" (cf. roundup_server) then the database is always
709 re-opened.
710 """
711 # don't do anything if the db is open and the user has not changed
712 if hasattr(self, 'db') and self.db.isCurrentUser(username):
713 return
715 # open the database or only set the user
716 if not hasattr(self, 'db'):
717 self.db = self.instance.open(username)
718 else:
719 if self.instance.optimize:
720 self.db.setCurrentUser(username)
721 else:
722 self.db.close()
723 self.db = self.instance.open(username)
725 def determine_context(self, dre=re.compile(r'([^\d]+)0*(\d+)')):
726 """Determine the context of this page from the URL:
728 The URL path after the instance identifier is examined. The path
729 is generally only one entry long.
731 - if there is no path, then we are in the "home" context.
732 - if the path is "_file", then the additional path entry
733 specifies the filename of a static file we're to serve up
734 from the instance "html" directory. Raises a SendStaticFile
735 exception.(*)
736 - if there is something in the path (eg "issue"), it identifies
737 the tracker class we're to display.
738 - if the path is an item designator (eg "issue123"), then we're
739 to display a specific item.
740 - if the path starts with an item designator and is longer than
741 one entry, then we're assumed to be handling an item of a
742 FileClass, and the extra path information gives the filename
743 that the client is going to label the download with (ie
744 "file123/image.png" is nicer to download than "file123"). This
745 raises a SendFile exception.(*)
747 Both of the "*" types of contexts stop before we bother to
748 determine the template we're going to use. That's because they
749 don't actually use templates.
751 The template used is specified by the :template CGI variable,
752 which defaults to:
754 - only classname suplied: "index"
755 - full item designator supplied: "item"
757 We set:
759 self.classname - the class to display, can be None
761 self.template - the template to render the current context with
763 self.nodeid - the nodeid of the class we're displaying
764 """
765 # default the optional variables
766 self.classname = None
767 self.nodeid = None
769 # see if a template or messages are specified
770 template_override = ok_message = error_message = None
771 for key in self.form.keys():
772 if self.FV_TEMPLATE.match(key):
773 template_override = self.form[key].value
774 elif self.FV_OK_MESSAGE.match(key):
775 ok_message = self.form[key].value
776 ok_message = clean_message(ok_message)
777 elif self.FV_ERROR_MESSAGE.match(key):
778 error_message = self.form[key].value
779 error_message = clean_message(error_message)
781 # see if we were passed in a message
782 if ok_message:
783 self.ok_message.append(ok_message)
784 if error_message:
785 self.error_message.append(error_message)
787 # determine the classname and possibly nodeid
788 path = self.path.split('/')
789 if not path or path[0] in ('', 'home', 'index'):
790 if template_override is not None:
791 self.template = template_override
792 else:
793 self.template = ''
794 return
795 elif path[0] in ('_file', '@@file'):
796 raise SendStaticFile, os.path.join(*path[1:])
797 else:
798 self.classname = path[0]
799 if len(path) > 1:
800 # send the file identified by the designator in path[0]
801 raise SendFile, path[0]
803 # see if we got a designator
804 m = dre.match(self.classname)
805 if m:
806 self.classname = m.group(1)
807 self.nodeid = m.group(2)
808 try:
809 klass = self.db.getclass(self.classname)
810 except KeyError:
811 raise NotFound, '%s/%s'%(self.classname, self.nodeid)
812 if not klass.hasnode(self.nodeid):
813 raise NotFound, '%s/%s'%(self.classname, self.nodeid)
814 # with a designator, we default to item view
815 self.template = 'item'
816 else:
817 # with only a class, we default to index view
818 self.template = 'index'
820 # make sure the classname is valid
821 try:
822 self.db.getclass(self.classname)
823 except KeyError:
824 raise NotFound, self.classname
826 # see if we have a template override
827 if template_override is not None:
828 self.template = template_override
830 def serve_file(self, designator, dre=re.compile(r'([^\d]+)(\d+)')):
831 """ Serve the file from the content property of the designated item.
832 """
833 m = dre.match(str(designator))
834 if not m:
835 raise NotFound, str(designator)
836 classname, nodeid = m.group(1), m.group(2)
838 klass = self.db.getclass(classname)
840 # make sure we have the appropriate properties
841 props = klass.getprops()
842 if not props.has_key('type'):
843 raise NotFound, designator
844 if not props.has_key('content'):
845 raise NotFound, designator
847 # make sure we have permission
848 if not self.db.security.hasPermission('View', self.userid,
849 classname, 'content', nodeid):
850 raise Unauthorised, self._("You are not allowed to view "
851 "this file.")
853 mime_type = klass.get(nodeid, 'type')
855 # if the mime_type is HTML-ish then make sure we're allowed to serve up
856 # HTML-ish content
857 if mime_type in ('text/html', 'text/x-html'):
858 if not self.instance.config['WEB_ALLOW_HTML_FILE']:
859 # do NOT serve the content up as HTML
860 mime_type = 'application/octet-stream'
862 # If this object is a file (i.e., an instance of FileClass),
863 # see if we can find it in the filesystem. If so, we may be
864 # able to use the more-efficient request.sendfile method of
865 # sending the file. If not, just get the "content" property
866 # in the usual way, and use that.
867 content = None
868 filename = None
869 if isinstance(klass, hyperdb.FileClass):
870 try:
871 filename = self.db.filename(classname, nodeid)
872 except AttributeError:
873 # The database doesn't store files in the filesystem
874 # and therefore doesn't provide the "filename" method.
875 pass
876 except IOError:
877 # The file does not exist.
878 pass
879 if not filename:
880 content = klass.get(nodeid, 'content')
882 lmt = klass.get(nodeid, 'activity').timestamp()
884 self._serve_file(lmt, mime_type, content, filename)
886 def serve_static_file(self, file):
887 """ Serve up the file named from the templates dir
888 """
889 # figure the filename - try STATIC_FILES, then TEMPLATES dir
890 for dir_option in ('STATIC_FILES', 'TEMPLATES'):
891 prefix = self.instance.config[dir_option]
892 if not prefix:
893 continue
894 # ensure the load doesn't try to poke outside
895 # of the static files directory
896 prefix = os.path.normpath(prefix)
897 filename = os.path.normpath(os.path.join(prefix, file))
898 if os.path.isfile(filename) and filename.startswith(prefix):
899 break
900 else:
901 raise NotFound, file
903 # last-modified time
904 lmt = os.stat(filename)[stat.ST_MTIME]
906 # detemine meta-type
907 file = str(file)
908 mime_type = mimetypes.guess_type(file)[0]
909 if not mime_type:
910 if file.endswith('.css'):
911 mime_type = 'text/css'
912 else:
913 mime_type = 'text/plain'
915 self._serve_file(lmt, mime_type, '', filename)
917 def _serve_file(self, lmt, mime_type, content=None, filename=None):
918 """ guts of serve_file() and serve_static_file()
919 """
921 # spit out headers
922 self.additional_headers['Content-Type'] = mime_type
923 self.additional_headers['Last-Modified'] = rfc822.formatdate(lmt)
925 ims = None
926 # see if there's an if-modified-since...
927 # XXX see which interfaces set this
928 #if hasattr(self.request, 'headers'):
929 #ims = self.request.headers.getheader('if-modified-since')
930 if self.env.has_key('HTTP_IF_MODIFIED_SINCE'):
931 # cgi will put the header in the env var
932 ims = self.env['HTTP_IF_MODIFIED_SINCE']
933 if ims:
934 ims = rfc822.parsedate(ims)[:6]
935 lmtt = time.gmtime(lmt)[:6]
936 if lmtt <= ims:
937 raise NotModified
939 if filename:
940 self.write_file(filename)
941 else:
942 self.additional_headers['Content-Length'] = str(len(content))
943 self.write(content)
945 def renderContext(self):
946 """ Return a PageTemplate for the named page
947 """
948 name = self.classname
949 extension = self.template
951 # catch errors so we can handle PT rendering errors more nicely
952 args = {
953 'ok_message': self.ok_message,
954 'error_message': self.error_message
955 }
956 try:
957 pt = self.instance.templates.get(name, extension)
958 # let the template render figure stuff out
959 result = pt.render(self, None, None, **args)
960 self.additional_headers['Content-Type'] = pt.content_type
961 if self.env.get('CGI_SHOW_TIMING', ''):
962 if self.env['CGI_SHOW_TIMING'].upper() == 'COMMENT':
963 timings = {'starttag': '<!-- ', 'endtag': ' -->'}
964 else:
965 timings = {'starttag': '<p>', 'endtag': '</p>'}
966 timings['seconds'] = time.time()-self.start
967 s = self._('%(starttag)sTime elapsed: %(seconds)fs%(endtag)s\n'
968 ) % timings
969 if hasattr(self.db, 'stats'):
970 timings.update(self.db.stats)
971 s += self._("%(starttag)sCache hits: %(cache_hits)d,"
972 " misses %(cache_misses)d."
973 " Loading items: %(get_items)f secs."
974 " Filtering: %(filtering)f secs."
975 "%(endtag)s\n") % timings
976 s += '</body>'
977 result = result.replace('</body>', s)
978 return result
979 except templating.NoTemplate, message:
980 return '<strong>%s</strong>'%message
981 except templating.Unauthorised, message:
982 raise Unauthorised, str(message)
983 except:
984 # everything else
985 if self.instance.config.WEB_DEBUG:
986 return cgitb.pt_html(i18n=self.translator)
987 exc_info = sys.exc_info()
988 try:
989 # If possible, send the HTML page template traceback
990 # to the administrator.
991 to = [self.mailer.config.ADMIN_EMAIL]
992 subject = "Templating Error: %s" % exc_info[1]
993 content = cgitb.pt_html()
994 message, writer = self.mailer.get_standard_message(
995 to, subject)
996 writer.addheader('Content-Transfer-Encoding', 'quoted-printable')
997 body = writer.startbody('text/html; charset=utf-8')
998 content = StringIO(content)
999 quopri.encode(content, body, 0)
1000 self.mailer.smtp_send(to, message)
1001 # Now report the error to the user.
1002 return self._(error_message)
1003 except:
1004 # Reraise the original exception. The user will
1005 # receive an error message, and the adminstrator will
1006 # receive a traceback, albeit with less information
1007 # than the one we tried to generate above.
1008 raise exc_info[0], exc_info[1], exc_info[2]
1010 # these are the actions that are available
1011 actions = (
1012 ('edit', EditItemAction),
1013 ('editcsv', EditCSVAction),
1014 ('new', NewItemAction),
1015 ('register', RegisterAction),
1016 ('confrego', ConfRegoAction),
1017 ('passrst', PassResetAction),
1018 ('login', LoginAction),
1019 ('logout', LogoutAction),
1020 ('search', SearchAction),
1021 ('retire', RetireAction),
1022 ('show', ShowAction),
1023 ('export_csv', ExportCSVAction),
1024 )
1025 def handle_action(self):
1026 """ Determine whether there should be an Action called.
1028 The action is defined by the form variable :action which
1029 identifies the method on this object to call. The actions
1030 are defined in the "actions" sequence on this class.
1032 Actions may return a page (by default HTML) to return to the
1033 user, bypassing the usual template rendering.
1035 We explicitly catch Reject and ValueError exceptions and
1036 present their messages to the user.
1037 """
1038 if self.form.has_key(':action'):
1039 action = self.form[':action'].value.lower()
1040 elif self.form.has_key('@action'):
1041 action = self.form['@action'].value.lower()
1042 else:
1043 return None
1045 try:
1046 action_klass = self.get_action_class(action)
1048 # call the mapped action
1049 if isinstance(action_klass, type('')):
1050 # old way of specifying actions
1051 return getattr(self, action_klass)()
1052 else:
1053 return action_klass(self).execute()
1055 except (ValueError, Reject), err:
1056 self.error_message.append(str(err))
1058 def get_action_class(self, action_name):
1059 if (hasattr(self.instance, 'cgi_actions') and
1060 self.instance.cgi_actions.has_key(action_name)):
1061 # tracker-defined action
1062 action_klass = self.instance.cgi_actions[action_name]
1063 else:
1064 # go with a default
1065 for name, action_klass in self.actions:
1066 if name == action_name:
1067 break
1068 else:
1069 raise ValueError, 'No such action "%s"'%action_name
1070 return action_klass
1072 def _socket_op(self, call, *args, **kwargs):
1073 """Execute socket-related operation, catch common network errors
1075 Parameters:
1076 call: a callable to execute
1077 args, kwargs: call arguments
1079 """
1080 try:
1081 call(*args, **kwargs)
1082 except socket.error, err:
1083 err_errno = getattr (err, 'errno', None)
1084 if err_errno is None:
1085 try:
1086 err_errno = err[0]
1087 except TypeError:
1088 pass
1089 if err_errno not in self.IGNORE_NET_ERRORS:
1090 raise
1091 except IOError:
1092 # Apache's mod_python will raise IOError -- without an
1093 # accompanying errno -- when a write to the client fails.
1094 # A common case is that the client has closed the
1095 # connection. There's no way to be certain that this is
1096 # the situation that has occurred here, but that is the
1097 # most likely case.
1098 pass
1100 def write(self, content):
1101 if not self.headers_done:
1102 self.header()
1103 if self.env['REQUEST_METHOD'] != 'HEAD':
1104 self._socket_op(self.request.wfile.write, content)
1106 def write_html(self, content):
1107 if not self.headers_done:
1108 # at this point, we are sure about Content-Type
1109 if not self.additional_headers.has_key('Content-Type'):
1110 self.additional_headers['Content-Type'] = \
1111 'text/html; charset=%s' % self.charset
1112 self.header()
1114 if self.env['REQUEST_METHOD'] == 'HEAD':
1115 # client doesn't care about content
1116 return
1118 if self.charset != self.STORAGE_CHARSET:
1119 # recode output
1120 content = content.decode(self.STORAGE_CHARSET, 'replace')
1121 content = content.encode(self.charset, 'xmlcharrefreplace')
1123 # and write
1124 self._socket_op(self.request.wfile.write, content)
1126 def http_strip(self, content):
1127 """Remove HTTP Linear White Space from 'content'.
1129 'content' -- A string.
1131 returns -- 'content', with all leading and trailing LWS
1132 removed."""
1134 # RFC 2616 2.2: Basic Rules
1135 #
1136 # LWS = [CRLF] 1*( SP | HT )
1137 return content.strip(" \r\n\t")
1139 def http_split(self, content):
1140 """Split an HTTP list.
1142 'content' -- A string, giving a list of items.
1144 returns -- A sequence of strings, containing the elements of
1145 the list."""
1147 # RFC 2616 2.1: Augmented BNF
1148 #
1149 # Grammar productions of the form "#rule" indicate a
1150 # comma-separated list of elements matching "rule". LWS
1151 # is then removed from each element, and empty elements
1152 # removed.
1154 # Split at commas.
1155 elements = content.split(",")
1156 # Remove linear whitespace at either end of the string.
1157 elements = [self.http_strip(e) for e in elements]
1158 # Remove any now-empty elements.
1159 return [e for e in elements if e]
1161 def handle_range_header(self, length, etag):
1162 """Handle the 'Range' and 'If-Range' headers.
1164 'length' -- the length of the content available for the
1165 resource.
1167 'etag' -- the entity tag for this resources.
1169 returns -- If the request headers (including 'Range' and
1170 'If-Range') indicate that only a portion of the entity should
1171 be returned, then the return value is a pair '(offfset,
1172 length)' indicating the first byte and number of bytes of the
1173 content that should be returned to the client. In addition,
1174 this method will set 'self.response_code' to indicate Partial
1175 Content. In all other cases, the return value is 'None'. If
1176 appropriate, 'self.response_code' will be
1177 set to indicate 'REQUESTED_RANGE_NOT_SATISFIABLE'. In that
1178 case, the caller should not send any data to the client."""
1180 # RFC 2616 14.35: Range
1181 #
1182 # See if the Range header is present.
1183 ranges_specifier = self.env.get("HTTP_RANGE")
1184 if ranges_specifier is None:
1185 return None
1186 # RFC 2616 14.27: If-Range
1187 #
1188 # Check to see if there is an If-Range header.
1189 # Because the specification says:
1190 #
1191 # The If-Range header ... MUST be ignored if the request
1192 # does not include a Range header, we check for If-Range
1193 # after checking for Range.
1194 if_range = self.env.get("HTTP_IF_RANGE")
1195 if if_range:
1196 # The grammar for the If-Range header is:
1197 #
1198 # If-Range = "If-Range" ":" ( entity-tag | HTTP-date )
1199 # entity-tag = [ weak ] opaque-tag
1200 # weak = "W/"
1201 # opaque-tag = quoted-string
1202 #
1203 # We only support strong entity tags.
1204 if_range = self.http_strip(if_range)
1205 if (not if_range.startswith('"')
1206 or not if_range.endswith('"')):
1207 return None
1208 # If the condition doesn't match the entity tag, then we
1209 # must send the client the entire file.
1210 if if_range != etag:
1211 return
1212 # The grammar for the Range header value is:
1213 #
1214 # ranges-specifier = byte-ranges-specifier
1215 # byte-ranges-specifier = bytes-unit "=" byte-range-set
1216 # byte-range-set = 1#( byte-range-spec | suffix-byte-range-spec )
1217 # byte-range-spec = first-byte-pos "-" [last-byte-pos]
1218 # first-byte-pos = 1*DIGIT
1219 # last-byte-pos = 1*DIGIT
1220 # suffix-byte-range-spec = "-" suffix-length
1221 # suffix-length = 1*DIGIT
1222 #
1223 # Look for the "=" separating the units from the range set.
1224 specs = ranges_specifier.split("=", 1)
1225 if len(specs) != 2:
1226 return None
1227 # Check that the bytes-unit is in fact "bytes". If it is not,
1228 # we do not know how to process this range.
1229 bytes_unit = self.http_strip(specs[0])
1230 if bytes_unit != "bytes":
1231 return None
1232 # Seperate the range-set into range-specs.
1233 byte_range_set = self.http_strip(specs[1])
1234 byte_range_specs = self.http_split(byte_range_set)
1235 # We only handle exactly one range at this time.
1236 if len(byte_range_specs) != 1:
1237 return None
1238 # Parse the spec.
1239 byte_range_spec = byte_range_specs[0]
1240 pos = byte_range_spec.split("-", 1)
1241 if len(pos) != 2:
1242 return None
1243 # Get the first and last bytes.
1244 first = self.http_strip(pos[0])
1245 last = self.http_strip(pos[1])
1246 # We do not handle suffix ranges.
1247 if not first:
1248 return None
1249 # Convert the first and last positions to integers.
1250 try:
1251 first = int(first)
1252 if last:
1253 last = int(last)
1254 else:
1255 last = length - 1
1256 except:
1257 # The positions could not be parsed as integers.
1258 return None
1259 # Check that the range makes sense.
1260 if (first < 0 or last < 0 or last < first):
1261 return None
1262 if last >= length:
1263 # RFC 2616 10.4.17: 416 Requested Range Not Satisfiable
1264 #
1265 # If there is an If-Range header, RFC 2616 says that we
1266 # should just ignore the invalid Range header.
1267 if if_range:
1268 return None
1269 # Return code 416 with a Content-Range header giving the
1270 # allowable range.
1271 self.response_code = httplib.REQUESTED_RANGE_NOT_SATISFIABLE
1272 self.setHeader("Content-Range", "bytes */%d" % length)
1273 return None
1274 # RFC 2616 10.2.7: 206 Partial Content
1275 #
1276 # Tell the client that we are honoring the Range request by
1277 # indicating that we are providing partial content.
1278 self.response_code = httplib.PARTIAL_CONTENT
1279 # RFC 2616 14.16: Content-Range
1280 #
1281 # Tell the client what data we are providing.
1282 #
1283 # content-range-spec = byte-content-range-spec
1284 # byte-content-range-spec = bytes-unit SP
1285 # byte-range-resp-spec "/"
1286 # ( instance-length | "*" )
1287 # byte-range-resp-spec = (first-byte-pos "-" last-byte-pos)
1288 # | "*"
1289 # instance-length = 1 * DIGIT
1290 self.setHeader("Content-Range",
1291 "bytes %d-%d/%d" % (first, last, length))
1292 return (first, last - first + 1)
1294 def write_file(self, filename):
1295 """Send the contents of 'filename' to the user."""
1297 # Determine the length of the file.
1298 stat_info = os.stat(filename)
1299 length = stat_info[stat.ST_SIZE]
1300 # Assume we will return the entire file.
1301 offset = 0
1302 # If the headers have not already been finalized,
1303 if not self.headers_done:
1304 # RFC 2616 14.19: ETag
1305 #
1306 # Compute the entity tag, in a format similar to that
1307 # used by Apache.
1308 etag = '"%x-%x-%x"' % (stat_info[stat.ST_INO],
1309 length,
1310 stat_info[stat.ST_MTIME])
1311 self.setHeader("ETag", etag)
1312 # RFC 2616 14.5: Accept-Ranges
1313 #
1314 # Let the client know that we will accept range requests.
1315 self.setHeader("Accept-Ranges", "bytes")
1316 # RFC 2616 14.35: Range
1317 #
1318 # If there is a Range header, we may be able to avoid
1319 # sending the entire file.
1320 content_range = self.handle_range_header(length, etag)
1321 if content_range:
1322 offset, length = content_range
1323 # RFC 2616 14.13: Content-Length
1324 #
1325 # Tell the client how much data we are providing.
1326 self.setHeader("Content-Length", length)
1327 # Send the HTTP header.
1328 self.header()
1329 # If the client doesn't actually want the body, or if we are
1330 # indicating an invalid range.
1331 if (self.env['REQUEST_METHOD'] == 'HEAD'
1332 or self.response_code == httplib.REQUESTED_RANGE_NOT_SATISFIABLE):
1333 return
1334 # Use the optimized "sendfile" operation, if possible.
1335 if hasattr(self.request, "sendfile"):
1336 self._socket_op(self.request.sendfile, filename, offset, length)
1337 return
1338 # Fallback to the "write" operation.
1339 f = open(filename, 'rb')
1340 try:
1341 if offset:
1342 f.seek(offset)
1343 content = f.read(length)
1344 finally:
1345 f.close()
1346 self.write(content)
1348 def setHeader(self, header, value):
1349 """Override a header to be returned to the user's browser.
1350 """
1351 self.additional_headers[header] = value
1353 def header(self, headers=None, response=None):
1354 """Put up the appropriate header.
1355 """
1356 if headers is None:
1357 headers = {'Content-Type':'text/html; charset=utf-8'}
1358 if response is None:
1359 response = self.response_code
1361 # update with additional info
1362 headers.update(self.additional_headers)
1364 if headers.get('Content-Type', 'text/html') == 'text/html':
1365 headers['Content-Type'] = 'text/html; charset=utf-8'
1367 headers = headers.items()
1369 for ((path, name), (value, expire)) in self._cookies.items():
1370 cookie = "%s=%s; Path=%s;"%(name, value, path)
1371 if expire is not None:
1372 cookie += " expires=%s;"%Cookie._getdate(expire)
1373 headers.append(('Set-Cookie', cookie))
1375 self._socket_op(self.request.start_response, headers, response)
1377 self.headers_done = 1
1378 if self.debug:
1379 self.headers_sent = headers
1381 def add_cookie(self, name, value, expire=86400*365, path=None):
1382 """Set a cookie value to be sent in HTTP headers
1384 Parameters:
1385 name:
1386 cookie name
1387 value:
1388 cookie value
1389 expire:
1390 cookie expiration time (seconds).
1391 If value is empty (meaning "delete cookie"),
1392 expiration time is forced in the past
1393 and this argument is ignored.
1394 If None, the cookie will expire at end-of-session.
1395 If omitted, the cookie will be kept for a year.
1396 path:
1397 cookie path (optional)
1399 """
1400 if path is None:
1401 path = self.cookie_path
1402 if not value:
1403 expire = -1
1404 self._cookies[(path, name)] = (value, expire)
1406 def set_cookie(self, user, expire=None):
1407 """Deprecated. Use session_api calls directly
1409 XXX remove
1410 """
1412 # insert the session in the session db
1413 self.session_api.set(user=user)
1414 # refresh session cookie
1415 self.session_api.update(set_cookie=True, expire=expire)
1417 def make_user_anonymous(self):
1418 """ Make us anonymous
1420 This method used to handle non-existence of the 'anonymous'
1421 user, but that user is mandatory now.
1422 """
1423 self.userid = self.db.user.lookup('anonymous')
1424 self.user = 'anonymous'
1426 def standard_message(self, to, subject, body, author=None):
1427 """Send a standard email message from Roundup.
1429 "to" - recipients list
1430 "subject" - Subject
1431 "body" - Message
1432 "author" - (name, address) tuple or None for admin email
1434 Arguments are passed to the Mailer.standard_message code.
1435 """
1436 try:
1437 self.mailer.standard_message(to, subject, body, author)
1438 except MessageSendError, e:
1439 self.error_message.append(str(e))
1440 return 0
1441 return 1
1443 def parsePropsFromForm(self, create=0):
1444 return FormParser(self).parse(create=create)
1446 # vim: set et sts=4 sw=4 :