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Renaming repository to new name: luminotes

master
Dan Helfman 12 years ago
commit
02cfca5322
76 changed files with 13890 additions and 0 deletions
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      INSTALL
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      README
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      limitedmedium.py
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      model/Entry.py
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      model/Notebook.py
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      model/Persistent.py
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      model/Read_only_notebook.py
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      model/test/Test_entry.py
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      model/test/Test_read_only_notebook.py
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      tools/initdb.py
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      tools/updatedb.py
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      view/Entry_page.py
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      view/Error_page.py
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      view/Html_file.py
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      view/Json.py
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      view/Link_area.py
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      view/Main_page.py
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      view/Node.py
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      view/Page.py
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13. Use with the GNU Affero General Public License.

Notwithstanding any other provision of this License, you have
permission to link or combine any covered work with a work licensed
under version 3 of the GNU Affero General Public License into a single
combined work, and to convey the resulting work. The terms of this
License will continue to apply to the part which is the covered work,
but the special requirements of the GNU Affero General Public License,
section 13, concerning interaction through a network will apply to the
combination as such.

14. Revised Versions of this License.

The Free Software Foundation may publish revised and/or new versions of
the GNU General Public License from time to time. Such new versions will
be similar in spirit to the present version, but may differ in detail to
address new problems or concerns.

Each version is given a distinguishing version number. If the
Program specifies that a certain numbered version of the GNU General
Public License "or any later version" applies to it, you have the
option of following the terms and conditions either of that numbered
version or of any later version published by the Free Software
Foundation. If the Program does not specify a version number of the
GNU General Public License, you may choose any version ever published
by the Free Software Foundation.

If the Program specifies that a proxy can decide which future
versions of the GNU General Public License can be used, that proxy's
public statement of acceptance of a version permanently authorizes you
to choose that version for the Program.

Later license versions may give you additional or different
permissions. However, no additional obligations are imposed on any
author or copyright holder as a result of your choosing to follow a
later version.

15. Disclaimer of Warranty.

THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
ALL NECESSARY SERVICING, REPAIR OR CORRECTION.

16. Limitation of Liability.

IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
SUCH DAMAGES.

17. Interpretation of Sections 15 and 16.

If the disclaimer of warranty and limitation of liability provided
above cannot be given local legal effect according to their terms,
reviewing courts shall apply local law that most closely approximates
an absolute waiver of all civil liability in connection with the
Program, unless a warranty or assumption of liability accompanies a
copy of the Program in return for a fee.

END OF TERMS AND CONDITIONS

How to Apply These Terms to Your New Programs

If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.

To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.

<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.

Also add information on how to contact you by electronic and paper mail.

If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:

<program> Copyright (C) <year> <name of author>
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.

The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".

You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<http://www.gnu.org/licenses/>.

The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<http://www.gnu.org/philosophy/why-not-lgpl.html>.

+ 26
- 0
INSTALL View File

@@ -0,0 +1,26 @@
To use the Limited Medium wiki, please see the included README file instead of
this INSTALL file. This file contains details about installing the Limited
Medium server, which you shouldn't need if you only want to make a wiki.

First, install the prerequisites:

* Python 2.5
* CherryPy 2.2
* simplejson 1.3

If you're interested in running unit tests, also install:

* nose 0.9.0

Run the server in development mode:

python2.5 limitedmedium.py -d

Connect to the following URL in a web browser running on the same machine:

http://localhost:8080/

You can run unit tests by running:

nosetests


+ 71
- 0
README View File

@@ -0,0 +1,71 @@
Limited Medium

http://somewhere

Limited Medium is a lightweight personal wiki notebook for organizing your
notes and ideas. It's designed for:

* Writers. Keep track of your characters, plots, and scenes.
* Students. Take notes and make links between related concepts.
* Game designers. Build up your world one detail at a time.
* Creative types. If you've outgrown a Word doc or text file full of
disorganized notes, Limited Medium can help.

Here's how Limited Medium differs from other personal wikis:

* What you see is what you mean. You can forget about markup or markdown.
* Integrated viewing and editing. Update any wiki entry without switching
back and forth.
* View multiple wiki entries at once. Perfect for notes and brainstorming.
* Access your wiki from anywhere. All your work is automatically saved to the
server.
* Use any sort of link titles you want. Wiki links aren't expected to
LookLikeThis.

Limited Medium also has the following features:

* Built-in searching. A single search looks through every word in the entire
wiki.

Limited Medium makes use of some advanced browser features, so not all
browsers will work for editing your wiki. Supported browsers include:

* Internet Explorer 6+
* Firefox 1.5+
* SeaMonkey 1.0+
* Iceweasel 1.5+
* Iceape 1.0+

The following web browsers are known not to work with Limited Medium:

* Safari
* Opera
* Konqueror
* Lynx

If you're looking for a personal wiki with more minimal browser requirements,
you might want to try TiddlyWiki. If you're looking for a more general-purpose
wiki for multiple users, check out MoinMoin.

If you'd like to actually install the Limited Medium server, see the INSTALL
file.

Enjoy!

Limited Medium Copyright (C) 2007 Dan Helfman

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.

See the COPYING file for more information. Also note that MochiKit has its
own separate license. See static/js/MochiKit_LICENSE.

+ 18
- 0
config/Common.py View File

@@ -0,0 +1,18 @@
import cherrypy


settings = {
"global": {
"server.socket_port": 8080,
"server.environment": "production",
"session_filter.on": True,
"session_filter.storage_type": "file",
"session_filter.storage_path": "session",
"session_filter.timeout": 60 * 72, # 72 hours
"session_filter.clean_up_delay": 5,
"encoding_filter.on": True,
"encoding_filter.encoding": "utf-8",
"decoding_filter.on": True,
"decoding_filter.encoding": "utf-8",
},
}

+ 19
- 0
config/Development.py View File

@@ -0,0 +1,19 @@
import os
import cherrypy


settings = {
"global": {
"server.thread_pool": 10,
"autoreload.on": True,
"static_filter.root": os.path.abspath( "." ),
},
"/static": {
"static_filter.on": True,
"static_filter.dir": "static",
},
"/favicon.ico": {
"static_filter.on": True,
"static_filter.file": "static/images/favicon.ico",
},
}

+ 14
- 0
config/Production.py View File

@@ -0,0 +1,14 @@
import cherrypy


settings = {
"global": {
"server.socket_queue_size": 15,
"server.thread_pool": 40,
"base_url_filter.on": True,
"base_url_filter.use_x_forwarded_host": True,
"server.log_to_screen": False,
"server.log_file": "limitedmedium.log",
"server.log_access_file": "limitedmedium.log",
},
}

+ 0
- 0
config/__init__.py View File


+ 16
- 0
controller/Async.py View File

@@ -0,0 +1,16 @@
import cherrypy


def async( method ):
"""
A decorator for a generator method that causes it to be invoked asynchronously. In other words,
whenever a generator method decorated by this decorator is called, its generator is added to
the scheduler for later execution.

This decorator expects a self.scheduler member containing the scheduler to use.
"""
def schedule( self, *args, **kwargs ):
thread = method( self, *args, **kwargs )
self.scheduler.add( thread )
return schedule

+ 214
- 0
controller/Database.py View File

@@ -0,0 +1,214 @@
import re
import bsddb
import random
import cPickle
from cStringIO import StringIO
from copy import copy
from model.Persistent import Persistent
from Async import async


class Database( object ):
ID_BITS = 128 # number of bits within an id
ID_DIGITS = "0123456789abcdefghijklmnopqrstuvwxyz"

def __init__( self, scheduler, database_path = None ):
"""
Create a new database and return it.

@type scheduler: Scheduler
@param scheduler: scheduler to use
@type database_path: unicode
@param database_path: path to the database file
@rtype: Database
@return: database at the given path
"""
self.__scheduler = scheduler
self.__env = bsddb.db.DBEnv()
self.__env.open( None, bsddb.db.DB_CREATE | bsddb.db.DB_PRIVATE | bsddb.db.DB_INIT_MPOOL )
self.__db = bsddb.db.DB( self.__env )
self.__db.open( database_path, "database", bsddb.db.DB_HASH, bsddb.db.DB_CREATE )
self.__cache = {}

def __persistent_id( self, obj, skip = None ):
# save the object and return its persistent id
if obj != skip and isinstance( obj, Persistent ):
self.__save( obj )
return obj.object_id

# returning None indicates that the object should be pickled normally without using a persistent id
return None

@async
def save( self, obj, callback = None ):
"""
Save the given object to the database, including any objects that it references.

@type obj: Persistent
@param obj: object to save
@type callback: generator or NoneType
@param callback: generator to wakeup when the save is complete (optional)
"""
self.__save( obj )
yield callback

def __save( self, obj ):
# if this object's current revision is already saved, bail
revision_id = obj.revision_id()
if revision_id in self.__cache:
return

object_id = unicode( obj.object_id ).encode( "utf8" )
revision_id = unicode( obj.revision_id() ).encode( "utf8" )
secondary_id = obj.secondary_id and unicode( obj.secondary_id ).encode( "utf8" ) or None

# update the cache with this saved object
self.__cache[ object_id ] = obj
self.__cache[ revision_id ] = copy( obj )
if obj.secondary_id:
self.__cache[ secondary_id ] = obj

# set the pickler up to save persistent ids for every object except for the obj passed in, which
# will be pickled normally
buffer = StringIO()
pickler = cPickle.Pickler( buffer, protocol = -1 )
pickler.persistent_id = lambda o: self.__persistent_id( o, skip = obj )

# pickle the object and write it to the database under both its id key and its revision id key
pickler.dump( obj )
pickled = buffer.getvalue()
self.__db.put( object_id, pickled )
self.__db.put( revision_id, pickled )

# write the pickled object id (only) to the database under its secondary id
if obj.secondary_id:
buffer = StringIO()
pickler = cPickle.Pickler( buffer, protocol = -1 )
pickler.persistent_id = lambda o: self.__persistent_id( o )
pickler.dump( obj )
self.__db.put( secondary_id, buffer.getvalue() )

self.__db.sync()

@async
def load( self, object_id, callback, revision = None ):
"""
Load the object corresponding to the given object id from the database, and yield the provided
callback generator with the loaded object as its argument, or None if the object_id is unknown.
If a revision is provided, a specific revision of the object will be loaded.

@type object_id: unicode
@param object_id: id of the object to load
@type callback: generator
@param callback: generator to send the loaded object to
@type revision: int or NoneType
@param revision: revision of the object to load (optional)
"""
obj = self.__load( object_id, revision )
yield callback, obj

def __load( self, object_id, revision = None ):
if revision is not None:
object_id = Persistent.make_revision_id( object_id, revision )

object_id = unicode( object_id ).encode( "utf8" )

# if the object corresponding to the given id has already been loaded, simply return it without
# loading it again
obj = self.__cache.get( object_id )
if obj is not None:
return obj

# grab the object for the given id from the database
buffer = StringIO()
unpickler = cPickle.Unpickler( buffer )
unpickler.persistent_load = self.__load

pickled = self.__db.get( object_id )
if pickled is None or pickled == "":
return None

buffer.write( pickled )
buffer.flush()
buffer.seek( 0 )

# unpickle the object and update the cache with this saved object
obj = unpickler.load()
if obj is None:
print "error unpickling %s: %s" % ( object_id, pickled )
return None
self.__cache[ unicode( obj.object_id ).encode( "utf8" ) ] = obj
self.__cache[ unicode( obj.revision_id() ).encode( "utf8" ) ] = obj

return obj

@staticmethod
def generate_id():
int_id = random.getrandbits( Database.ID_BITS )

base = len( Database.ID_DIGITS )
digits = []

while True:
index = int_id % base
digits.insert( 0, Database.ID_DIGITS[ index ] )
int_id = int_id / base
if int_id == 0:
break

return "".join( digits )

@async
def next_id( self, callback ):
"""
Generate the next available object id, and yielded the provided callback generator with the
object id as its argument.

@type callback: generator
@param callback: generator to send the next available object id to
"""
# generate a random id, but on the off-chance that it collides with something else already in
# the database, try again
next_id = Database.generate_id()
while self.__db.get( next_id, default = None ) is not None:
next_id = Database.generate_id()

# save the next_id as a key in the database so that it's not handed out again to another client
self.__db[ next_id ] = ""

yield callback, next_id

@async
def close( self ):
"""
Shutdown the database.
"""
self.__db.close()
self.__env.close()
yield None

@async
def clear_cache( self ):
"""
Clear the memory object cache.
"""
self.__cache.clear()
yield None

scheduler = property( lambda self: self.__scheduler )


class Valid_id( object ):
"""
Validator for an object id.
"""
ID_PATTERN = re.compile( "^[%s]+$" % Database.ID_DIGITS )

def __init__( self, none_okay = False ):
self.__none_okay = none_okay

def __call__( self, value ):
if self.__none_okay and value is None: return None
if self.ID_PATTERN.search( value ): return str( value )

raise ValueError()

+ 15
- 0
controller/Expire.py View File

@@ -0,0 +1,15 @@
import cherrypy


def strongly_expire( function ):
"""
Decorator that sends headers that instruct browsers and proxies not to cache.
"""
def expire( *args, **kwargs ):
cherrypy.response.headers[ "Expires" ] = "Sun, 19 Nov 1978 05:00:00 GMT"
cherrypy.response.headers[ "Cache-Control" ] = "no-store, no-cache, must-revalidate, post-check=0, pre-check=0"
cherrypy.response.headers[ "Pragma" ] = "no-cache"

return function( *args, **kwargs )

return expire

+ 87
- 0
controller/Expose.py View File

@@ -0,0 +1,87 @@
import cherrypy

from Validate import Validation_error

# module-level variable that, when set to a view, overrides the view for all exposed methods. used
# by unit tests
view_override = None


def expose( view = None, rss = None ):
"""
expose() can be used to tag a method as available for publishing to the web via CherryPy. In
other words, methods that are not exposed cannot be accessed from the web.

The expose() method itself is evaluated where it is used as a decorator, which just puts the view
variable into the enclosing scope of the decorate() function and returns decorate() to be used as
the actual decorator.

Example usage:

@expose( view = Json )
def method(): pass
"""
def decorate( function ):
"""
When the method being decorated is invoked, its decorator gets invoked instead and is supposed
to return a new function to use in place of the method being decorated (or a modified version
of that function). In this case, the decorator is our decorate() function, and the function it
returns is the render() function. decorate()'s first argument is the method being decorated.
"""
def render( *args, **kwargs ):
"""
render() pretends that it's the method being decorated. It takes the same arguments and then
invokes the actual method being decorated, passing in those arguments.

With whatever result it gets from calling that method, render() invokes the view from the
outer scope to try to render it. It then results that rendered result.
"""
result = {}

# if rss was requested, and this method was exposed for rss, then use rss as the view
if u"rss" in kwargs:
del kwargs[ u"rss" ]
use_rss = True
else:
use_rss = False

# kwarg names must be of type str, not unicode
kwargs = dict( [ ( str( key ), value ) for ( key, value ) in kwargs.items() ] )

# try executing the exposed function
try:
result = function( *args, **kwargs )
except Validation_error, error:
result = dict( name = error.name, value = error.value, error = error.message )

redirect = result.get( u"redirect", None )

# try using the supplied view to render the result
try:
if view_override is None:
if rss and use_rss:
cherrypy.response.headers[ u"Content-Type" ] = u"application/xml"
return unicode( rss( **result ) )
else:
return unicode( view( **result ) )
else:
return unicode( view_override( **result ) )
except:
if redirect is None:
print "error: %s" % result
raise

# if that doesn't work, and there's a redirect, then redirect
del( result[ u"redirect" ] )
from urllib import urlencode

if result == {}:
raise cherrypy.HTTPRedirect( u"%s" % redirect )
else:
url_args = urlencode( result )
raise cherrypy.HTTPRedirect( u"%s?%s" % ( redirect, url_args ) )

render.exposed = True
return render

return decorate

+ 146
- 0
controller/Html_cleaner.py View File

@@ -0,0 +1,146 @@
# originally from http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/496942

from htmllib import HTMLParser
from cgi import escape
from urlparse import urlparse
from formatter import AbstractFormatter, NullWriter
from htmlentitydefs import entitydefs
from xml.sax.saxutils import quoteattr

def xssescape(text):
"""Gets rid of < and > and & and, for good measure, :"""
return escape(text, quote=True).replace(':','&#58;')

class Html_cleaner(HTMLParser):
"""
Cleans HTML of any tags not matching a whitelist.
"""
def __init__( self ):
HTMLParser.__init__( self, AbstractFormatter( NullWriter() ) )
self.result = []
self.open_tags = []
# A list of the only tags allowed. Be careful adding to this. Adding
# "script," for example, would not be smart. 'img' is out by default
# because of the danger of IMG embedded commands, and/or web bugs.
self.permitted_tags = [
'a',
'b',
'br',
'em',
'h3',
'i',
'li',
'ol',
'ul',
'p',
'strong',
]

# A list of tags that are forcibly removed from the input. Tags that
# are not in permitted_tags and not in stripped_tags are simply
# escaped.
self.stripped_tags = [
'span',
]

# A list of tags that require no closing tag.
self.requires_no_close = [ 'img', 'br' ]

# A dictionary showing the only attributes allowed for particular tags.
# If a tag is not listed here, it is allowed no attributes. Adding
# "on" tags, like "onhover," would not be smart. Also be very careful
# of "background" and "style."
self.allowed_attributes = {
'a': [ 'href' ],
}

# The only schemes allowed in URLs (for href and src attributes).
# Adding "javascript" or "vbscript" to this list would not be smart.
self.allowed_schemes = ['http','https','ftp', '']

def handle_data(self, data):
if data:
self.result.append( xssescape(data) )

def handle_charref(self, ref):
if len(ref) < 7 and ref.isdigit():
self.result.append( '&#%s;' % ref )
else:
self.result.append( xssescape('&#%s' % ref) )

def handle_entityref(self, ref):
if ref in entitydefs:
self.result.append( '&%s;' % ref )
else:
self.result.append( xssescape('&%s' % ref) )

def handle_comment(self, comment):
if comment:
self.result.append( xssescape("<!--%s-->" % comment) )

def handle_starttag(self, tag, method, attrs):
if tag not in self.permitted_tags:
if tag not in self.stripped_tags:
self.result.append( xssescape("<%s>" % tag) )
else:
bt = "<" + tag
if tag in self.allowed_attributes:
attrs = dict(attrs)
self.allowed_attributes_here = \
[x for x in self.allowed_attributes[tag] if x in attrs \
and len(attrs[x]) > 0]
for attribute in self.allowed_attributes_here:
if attribute in ['href', 'src', 'background']:
if self.url_is_acceptable(attrs[attribute]):
bt += ' %s="%s"' % (attribute, attrs[attribute])
else:
bt += ' %s=%s' % \
(xssescape(attribute), quoteattr(attrs[attribute]))
if bt == "<a" or bt == "<img":
return
if tag in self.requires_no_close:
bt += "/"
bt += ">"
self.result.append( bt )
self.open_tags.insert(0, tag)
def handle_endtag(self, tag, attrs):
bracketed = "</%s>" % tag
if tag not in self.permitted_tags:
if tag not in self.stripped_tags:
self.result.append( xssescape(bracketed) )
elif tag in self.open_tags:
self.result.append( bracketed )
self.open_tags.remove(tag)
def unknown_starttag(self, tag, attributes):
self.handle_starttag(tag, None, attributes)

def unknown_endtag(self, tag):
self.handle_endtag(tag, None)

def url_is_acceptable(self,url):
parsed = urlparse(url)
return parsed[0] in self.allowed_schemes

def strip(self, rawstring):
"""Returns the argument stripped of potentially harmful HTML or Javascript code"""
self.reset()
self.result = []
self.feed(rawstring)
for endtag in self.open_tags:
if endtag not in self.requires_no_close:
self.result.append( "</%s>" % endtag )
return "".join( self.result )

def xtags(self):
"""Returns a printable string informing the user which tags are allowed"""
self.permitted_tags.sort()
tg = ""
for x in self.permitted_tags:
tg += "<" + x
if x in self.allowed_attributes:
for y in self.allowed_attributes[x]:
tg += ' %s=""' % y
tg += "> "
return xssescape(tg.strip())

+ 52
- 0
controller/Html_nuker.py View File

@@ -0,0 +1,52 @@
from htmllib import HTMLParser
from formatter import AbstractFormatter, NullWriter


class Html_nuker( HTMLParser ):
"""
Nukes HTML of all tags.
"""
def __init__( self, allow_refs = False ):
HTMLParser.__init__( self, AbstractFormatter( NullWriter() ) )
self.result = []
self.allow_refs = allow_refs

def handle_data( self, data ):
if data and "<" not in data and ">" not in data:
self.result.append( data )
def handle_charref( self, ref ):
if self.allow_refs:
self.result.append( ref )

def handle_entityref( self, ref ):
if self.allow_refs:
self.result.append( ref )

def handle_comment( self, comment ):
pass

def handle_starttag( self, tag, method, attrs ):
pass
def handle_endtag( self, tag, attrs ):
pass
def unknown_starttag( self, tag, attributes ):
pass

def unknown_endtag( self, tag ):
pass

def nuke( self, rawstring ):
"""
Nukes the given string of all HTML tags.
"""
if rawstring is None:
return u""

self.reset()
self.result = []
self.feed( rawstring )

return u"".join( self.result )

+ 398
- 0
controller/Notebooks.py View File

@@ -0,0 +1,398 @@
import cherrypy
from Scheduler import Scheduler
from Expose import expose
from Validate import validate, Valid_string, Validation_error, Valid_bool
from Database import Valid_id
from Users import grab_user_id
from Updater import wait_for_update, update_client
from Expire import strongly_expire
from Html_nuker import Html_nuker
from Async import async
from model.Notebook import Notebook
from model.Entry import Entry
from view.Main_page import Main_page
from view.Json import Json
from view.Entry_page import Entry_page
from view.Html_file import Html_file


class Access_error( Exception ):
def __init__( self, message = None ):
if message is None:
message = u"You don't have access to that notebook."

Exception.__init__( self, message )
self.__message = message

def to_dict( self ):
return dict(
error = self.__message
)


class Notebooks( object ):
def __init__( self, scheduler, database ):
self.__scheduler = scheduler
self.__database = database

@expose( view = Main_page )
@validate(
notebook_id = Valid_id(),
)
def default( self, notebook_id ):
return dict(
notebook_id = notebook_id,
)

@expose( view = Json )
@strongly_expire
@wait_for_update
@grab_user_id
@async
@update_client
@validate(
notebook_id = Valid_id(),
user_id = Valid_id( none_okay = True ),
)
def contents( self, notebook_id, user_id ):
self.check_access( notebook_id, user_id, self.__scheduler.thread )
if not ( yield Scheduler.SLEEP ):
raise Access_error()

self.__database.load( notebook_id, self.__scheduler.thread )
notebook = ( yield Scheduler.SLEEP )

yield dict(
notebook = notebook,
)

@expose( view = Json )
@strongly_expire
@wait_for_update
@grab_user_id
@async
@update_client
@validate(
notebook_id = Valid_id(),
entry_id = Valid_id(),
user_id = Valid_id( none_okay = True ),
)
def load_entry( self, notebook_id, entry_id, user_id ):
self.check_access( notebook_id, user_id, self.__scheduler.thread )
if not ( yield Scheduler.SLEEP ):
raise Access_error()

self.__database.load( notebook_id, self.__scheduler.thread )
notebook = ( yield Scheduler.SLEEP )

if notebook is None:
entry = None
else:
entry = notebook.lookup_entry( entry_id )

yield dict(
entry = entry,
)

@expose( view = Json )
@strongly_expire
@wait_for_update
@grab_user_id
@async
@update_client
@validate(
notebook_id = Valid_id(),
entry_title = Valid_string( min = 1, max = 500 ),
user_id = Valid_id( none_okay = True ),
)
def load_entry_by_title( self, notebook_id, entry_title, user_id ):
self.check_access( notebook_id, user_id, self.__scheduler.thread )
if not ( yield Scheduler.SLEEP ):
raise Access_error()

self.__database.load( notebook_id, self.__scheduler.thread )
notebook = ( yield Scheduler.SLEEP )

if notebook is None:
entry = None
else:
entry = notebook.lookup_entry_by_title( entry_title )

yield dict(
entry = entry,
)

@expose( view = Json )
@wait_for_update
@grab_user_id
@async
@update_client
@validate(
notebook_id = Valid_id(),
entry_id = Valid_id(),
contents = Valid_string( min = 1, max = 25000, escape_html = False ),
startup = Valid_bool(),
user_id = Valid_id( none_okay = True ),
)
def save_entry( self, notebook_id, entry_id, contents, startup, user_id ):
self.check_access( notebook_id, user_id, self.__scheduler.thread )
if not ( yield Scheduler.SLEEP ):
raise Access_error()

self.__database.load( notebook_id, self.__scheduler.thread )
notebook = ( yield Scheduler.SLEEP )

if not notebook:
yield dict(
saved = False,
)
return

self.__database.load( entry_id, self.__scheduler.thread )
entry = ( yield Scheduler.SLEEP )

# if the entry is already in the database, load it and update it. otherwise, create it
if entry and entry in notebook.entries:
notebook.update_entry( entry, contents )
else:
entry = Entry( entry_id, contents )
notebook.add_entry( entry )

if startup:
notebook.add_startup_entry( entry )
else:
notebook.remove_startup_entry( entry )

self.__database.save( notebook )

yield dict(
saved = True,
)

@expose( view = Json )
@wait_for_update
@grab_user_id
@async
@update_client
@validate(
notebook_id = Valid_id(),
entry_id = Valid_id(),
user_id = Valid_id( none_okay = True ),
)
def add_startup_entry( self, notebook_id, entry_id, user_id ):
self.check_access( notebook_id, user_id, self.__scheduler.thread )
if not ( yield Scheduler.SLEEP ):
raise Access_error()

self.__database.load( notebook_id, self.__scheduler.thread )
notebook = ( yield Scheduler.SLEEP )

if not notebook:
yield dict()
return # TODO: raising an exception here would be nice

self.__database.load( entry_id, self.__scheduler.thread )
entry = ( yield Scheduler.SLEEP )

if entry:
notebook.add_startup_entry( entry )
self.__database.save( notebook )

yield dict()

@expose( view = Json )
@wait_for_update
@grab_user_id
@async
@update_client
@validate(
notebook_id = Valid_id(),
entry_id = Valid_id(),
user_id = Valid_id( none_okay = True ),
)
def remove_startup_entry( self, notebook_id, entry_id, user_id ):
self.check_access( notebook_id, user_id, self.__scheduler.thread )
if not ( yield Scheduler.SLEEP ):
raise Access_error()

self.__database.load( notebook_id, self.__scheduler.thread )
notebook = ( yield Scheduler.SLEEP )

if not notebook:
yield dict()
return # TODO: raising an exception here would be nice

self.__database.load( entry_id, self.__scheduler.thread )
entry = ( yield Scheduler.SLEEP )

if entry:
notebook.remove_startup_entry( entry )
self.__database.save( notebook )

yield dict()

@expose( view = Json )
@wait_for_update
@grab_user_id
@async
@update_client
@validate(
notebook_id = Valid_id(),
entry_id = Valid_id(),
user_id = Valid_id( none_okay = True ),
)
def delete_entry( self, notebook_id, entry_id, user_id ):
self.check_access( notebook_id, user_id, self.__scheduler.thread )
if not ( yield Scheduler.SLEEP ):
raise Access_error()

self.__database.load( notebook_id, self.__scheduler.thread )
notebook = ( yield Scheduler.SLEEP )

if not notebook:
yield dict()
return # TODO: raising an exception here would be nice

self.__database.load( entry_id, self.__scheduler.thread )
entry = ( yield Scheduler.SLEEP )

if entry:
notebook.remove_entry( entry )
self.__database.save( notebook )

yield dict()

@expose( view = Entry_page )
@validate( id = Valid_id() )
def blank_entry( self, id ):
return dict( id = id )

@expose( view = Json )
@strongly_expire
@wait_for_update
@grab_user_id
@async
@update_client
@validate(
notebook_id = Valid_id(),
search_text = Valid_string( min = 0, max = 100 ),
user_id = Valid_id( none_okay = True ),
)
def search( self, notebook_id, search_text, user_id ):
self.check_access( notebook_id, user_id, self.__scheduler.thread )
if not ( yield Scheduler.SLEEP ):
raise Access_error()

self.__database.load( notebook_id, self.__scheduler.thread )
notebook = ( yield Scheduler.SLEEP )

if not notebook:
yield dict(
entries = [],
)
return

search_text = search_text.lower()
title_matches = []
content_matches = []
nuker = Html_nuker()

if len( search_text ) > 0:
for entry in notebook.entries:
if search_text in nuker.nuke( entry.title ).lower():
title_matches.append( entry )
elif search_text in nuker.nuke( entry.contents ).lower():
content_matches.append( entry )

entries = title_matches + content_matches

yield dict(
entries = entries,
)

@expose( view = Json )
@strongly_expire
@wait_for_update
@grab_user_id
@async
@update_client
@validate(
notebook_id = Valid_id(),
user_id = Valid_id( none_okay = True ),
)
def recent_entries( self, notebook_id, user_id ):
self.check_access( notebook_id, user_id, self.__scheduler.thread )
if not ( yield Scheduler.SLEEP ):
raise Access_error()

self.__database.load( notebook_id, self.__scheduler.thread )
notebook = ( yield Scheduler.SLEEP )

if not notebook:
yield dict(
entries = [],
)
return

RECENT_COUNT = 10
entries = notebook.entries
entries.sort( lambda a, b: cmp( b.revision, a.revision ) )

yield dict(
entries = entries[ :RECENT_COUNT ],
)

@expose( view = Html_file )
@strongly_expire
@wait_for_update
@grab_user_id
@async
@update_client
@validate(
notebook_id = Valid_id(),
user_id = Valid_id( none_okay = True ),
)
def download_html( self, notebook_id, user_id ):
self.check_access( notebook_id, user_id, self.__scheduler.thread )
if not ( yield Scheduler.SLEEP ):
raise Access_error()

self.__database.load( notebook_id, self.__scheduler.thread )
notebook = ( yield Scheduler.SLEEP )

if not notebook:
yield dict(
notebook_name = None,
entries = [],
)
return

normal_entries = list( set( notebook.entries ) - set( notebook.startup_entries ) )
normal_entries.sort( lambda a, b: -cmp( a.revision, b.revision ) )
yield dict(
notebook_name = notebook.name,
entries = notebook.startup_entries + normal_entries,
)

@async
def check_access( self, notebook_id, user_id, callback ):
# check if the anonymous user has access to this notebook
self.__database.load( u"anonymous", self.__scheduler.thread )
anonymous = ( yield Scheduler.SLEEP )

access = False
if anonymous.has_access( notebook_id ):
access = True

if user_id:
# check if the currently logged in user has access to this notebook
self.__database.load( user_id, self.__scheduler.thread )
user = ( yield Scheduler.SLEEP )

if user.has_access( notebook_id ):
access = True

yield callback, access

scheduler = property( lambda self: self.__scheduler )

+ 60
- 0
controller/Root.py View File

@@ -0,0 +1,60 @@
import cherrypy

from Scheduler import Scheduler
from Expose import expose
from Validate import validate
from Async import async
from Notebooks import Notebooks
from Users import Users
from Updater import update_client, wait_for_update
from view.Main_page import Main_page
from view.Json import Json
from view.Error_page import Error_page
from view.Not_found_page import Not_found_page


class Root( object ):
def __init__( self, scheduler, database ):
self.__scheduler = scheduler
self.__database = database
self.__notebooks = Notebooks( scheduler, database )
self.__users = Users( scheduler, database )

@expose( view = Main_page )
def index( self ):
"""
Provide the information necessary to display the web site's front page.
"""
return dict()

@expose( view = Json )
@wait_for_update
@async
@update_client
def next_id( self ):
self.__database.next_id( self.__scheduler.thread )
next_id = ( yield Scheduler.SLEEP )

yield dict(
next_id = next_id,
)

def _cp_on_http_error( self, status, message ):
"""
CherryPy HTTP error handler, used to display page not found and generic error pages.
"""
if status == 404:
cherrypy.response.headerMap[ u"Status" ] = u"404 Not Found"
cherrypy.response.status = status
cherrypy.response.body = [ unicode( Not_found_page() ) ]
return

import traceback
traceback.print_exc()

cherrypy.response.body = [ unicode( Error_page() ) ]

scheduler = property( lambda self: self.__scheduler )
database = property( lambda self: self.__database )
notebooks = property( lambda self: self.__notebooks )
users = property( lambda self: self.__users )

+ 123
- 0
controller/Scheduler.py View File

@@ -0,0 +1,123 @@
from time import time, sleep
from threading import Thread, Event


class Scheduler( object ):
SLEEP = 0 # yielded by a generator to indicate that it should be put to sleep

def __init__( self ):
"""
A scheduler for generator-based microthreads.
"""
self.__running = [] # list of active microthreads
self.__sleeping = [] # list of sleeping microthreads
self.__messages = {} # map of thread to list of its incoming messages
self.__thread = None # currently executing microthread (if any)
self.__done = False # whether it's time to exit
self.__no_longer_idle = Event()
self.__last_error = None # used for unit tests

self.add( self.__idle_thread() )

self.__scheduler_thread = Thread( target = self.run )
self.__scheduler_thread.setDaemon( True )
self.__scheduler_thread.start()

def run( self ):
"""
Run all threads repeatedly.
"""
while not self.__done:
self.__run_once()

def __run_once( self ):
"""
Run all active threads once.
"""
turn_start = time()

for thread in list( self.__running ):
try:
messages = self.__messages.get( thread )

self.__thread = thread
try:
if messages:
result = thread.send( *messages.pop( 0 ) )
else:
result = thread.next()
except StopIteration:
raise
except Exception, e:
self.__last_error = e
import traceback
traceback.print_exc()
raise StopIteration()

self__thread = None

if self.__done:
return True

if result is None:
continue

# a yielded result of SLEEP indicates to put the thread to sleep
if result == Scheduler.SLEEP:
self.sleep( thread )
# any other result indicates to run the yielded thread
elif isinstance( result, ( tuple, list ) ):
self.add( *result )
else:
self.add( result )
except StopIteration:
self.__running.remove( thread )
self.__messages.pop( thread, None )

def __idle_thread( self ):
while not self.__done:
# if the idle thread is the only one running, block until there's another running thread
if len( self.__running ) == 1:
self.__no_longer_idle.wait()
self.__no_longer_idle.clear()

yield None

# used for unit tests
IDLE_SLEEP_SECONDS = 0.01
def wait_for( self, thread ):
while thread in self.__running or thread in self.__sleeping:
sleep( self.IDLE_SLEEP_SECONDS )

if self.__last_error:
raise self.__last_error

def wait_until_idle( self ):
while len( self.__running ) > 1 or len( self.__sleeping ) > 0:
sleep( self.IDLE_SLEEP_SECONDS )

def sleep( self, thread ):
self.__sleeping.append( thread )
self.__running.remove( thread )

def add( self, thread, *args ):
self.__no_longer_idle.set()

if thread in self.__sleeping:
self.__sleeping.remove( thread )
else:
self.__messages[ thread ] = [ ( None, ) ]

self.__running.append( thread )

if len( args ) > 0:
self.__messages[ thread ].append( args )

def shutdown( self ):
self.__done = True
self.__no_longer_idle.set()
self.__scheduler_thread.join()

# currently executing microthread (if any)
thread = property( lambda self: self.__thread )

+ 70
- 0
controller/Updater.py View File

@@ -0,0 +1,70 @@
from Queue import Queue, Empty


TIMEOUT_SECONDS = 10.0


def wait_for_update( function ):
"""
A decorator that passes a "queue" keyword arugment to its decorated function, calls the function,
and then blocks until an asynchronous response comes back via the Queue. When a response is
received, wait_for_update() returns it.

For this decorator to be useful, you should use it to decorate a function that fires off some
asynchronous action and then returns immediately. A typical way to accomplish this is by using
the @async decorator after the @wait_for_update decorator.
"""
def get_message( *args, **kwargs ):
queue = Queue()

kwargs[ "queue" ] = queue
function( *args, **kwargs )

# wait until a response is available in the queue, and then return that response
try:
return queue.get( block = True, timeout = TIMEOUT_SECONDS )
except Empty:
return { "error": u"A timeout occurred when processing your request. Please try again." }

return get_message


def update_client( function ):
"""
A decorator used to wrap a generator function so that its yielded values can be issued as
updates to the client. For this to work, the generator function must be invoked with a keyword
argument "queue" containing a Queue where the result can be put().

Also supports catching Validation_error exceptions and sending appropriate errors to the client.

Note that this decorator itself is a generator function and works by passing along next()/send()
calls to its decorated generator. Only yielded values that are dictionaries are sent to the
client. All other yielded values are in turn yielded by this decorator itself.
"""
def put_message( *args, **kwargs ):
# look in the called function's kwargs for the queue where results should be sent
queue = kwargs.pop( "queue" )

try:
generator = function( *args, **kwargs )
message = None

while True:
result = generator.send( message )

if isinstance( result, dict ):
queue.put( result )
message = ( yield None )
else:
message = ( yield result )
except StopIteration:
return
except Exception, error:
# TODO: might be better to use view.Json instead of calling to_dict() manually
if hasattr( error, "to_dict" ):
result = error.to_dict()
queue.put( result )
else:
raise
return put_message

+ 232
- 0
controller/Users.py View File

@@ -0,0 +1,232 @@
import re
import cherrypy
from model.User import User
from model.Notebook import Notebook
from model.Entry import Entry
from Scheduler import Scheduler
from Expose import expose
from Validate import validate, Valid_string, Validation_error
from Database import Valid_id
from Updater import update_client, wait_for_update
from Expire import strongly_expire
from Async import async
from view.Json import Json


USERNAME_PATTERN = re.compile( "^[a-zA-Z0-9]+$" )
EMAIL_ADDRESS_PATTERN = re.compile( "^[\w.+]+@\w+(\.\w+)+$" )


def valid_username( username ):
if USERNAME_PATTERN.search( username ) is None:
raise ValueError()

return username

valid_username.message = u"can only contain letters and digits"


def valid_email_address( email_address ):
if email_address == "" or EMAIL_ADDRESS_PATTERN.search( email_address ) is None:
raise ValueError()

return email_address


class Signup_error( Exception ):
def __init__( self, message ):
Exception.__init__( self, message )
self.__message = message