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This commit is contained in:
Piotr Mitros
2011-12-29 09:51:32 -05:00
parent a30f1a1e99
commit fccfbb7d2f
4 changed files with 27 additions and 1 deletions
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2
courseware/capa_module.py
View File

@@ -115,7 +115,7 @@ class LoncapaModule(XModule):
dom2 = etree.fromstring(xml) dom2 = etree.fromstring(xml)
self.explanation=content_parser.item(dom2.xpath('/problem/@explain')) self.explanation=content_parser.item(dom2.xpath('/problem/@explain'), default="closed")
self.explain_available=content_parser.item(dom2.xpath('/problem/@explain_available')) self.explain_available=content_parser.item(dom2.xpath('/problem/@explain_available'))
self.due_date=content_parser.item(dom2.xpath('/problem/@due')) self.due_date=content_parser.item(dom2.xpath('/problem/@due'))

24
courseware/content_parser.py
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@@ -11,6 +11,30 @@ course XML file and the rest of the system.
TODO: Shift everything from xml.dom.minidom to XPath (or XQuery) TODO: Shift everything from xml.dom.minidom to XPath (or XQuery)
''' '''
def xpath(xml, query_string, **args):
''' Safe xpath query into an xml tree:
* xml is the tree.
* query_string is the query
* args are the parameters. Substitute for {params}. '''
doc = etree.fromstring(xml)
print type(doc)
def escape(x):
# TODO: This should escape the string. For now, we just assume it's made of valid characters.
# Couldn't figure out how to escape for lxml in a few quick Googles
valid_chars="".join(map(chr, range(ord('a'),ord('z')+1)+range(ord('A'),ord('Z')+1)+range(ord('0'), ord('9')+1)))+"_ "
for e in x:
if e not in valid_chars:
raise Exception("Invalid char in xpath expression. TODO: Escape")
return x
args=dict( ((k, escape(args[k])) for k in args) )
print args
results = doc.xpath(query_string.format(**args))
return results
if __name__=='__main__':
print xpath('<html><problem name="Bob"></problem></html>', '/{search}/problem[@name="{name}"]', search='html', name="Bob")
def item(l, default="", process=lambda x:x): def item(l, default="", process=lambda x:x):
if len(l)==0: if len(l)==0:
return default return default

1
settings.py
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@@ -103,6 +103,7 @@ INSTALLED_APPS = (
'django.contrib.humanize', 'django.contrib.humanize',
'static_template_view', 'static_template_view',
'textbook', 'textbook',
'staticbook',
# Uncomment the next line to enable the admin: # Uncomment the next line to enable the admin:
# 'django.contrib.admin', # 'django.contrib.admin',
# Uncomment the next line to enable admin documentation: # Uncomment the next line to enable admin documentation:

1
urls.py
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@@ -19,6 +19,7 @@ urlpatterns = patterns('',
# url(r'^accounts/', include('registration.urls')), # url(r'^accounts/', include('registration.urls')),
url(r'^t/(?P<template>[^/]*)$', 'static_template_view.views.index'), url(r'^t/(?P<template>[^/]*)$', 'static_template_view.views.index'),
url(r'^textbook/(?P<filename>[^/]*)$', 'textbook.views.index'), url(r'^textbook/(?P<filename>[^/]*)$', 'textbook.views.index'),
url(r'^book/(?P<page>[^/]*)$', 'staticbook.views.index'),
url(r'^logout$', 'auth.views.logout_user'), url(r'^logout$', 'auth.views.logout_user'),
url(r'^login$', 'auth.views.login_user'), url(r'^login$', 'auth.views.login_user'),
url(r'^login/(?P<error>[^/]*)$', 'auth.views.login_user'), url(r'^login/(?P<error>[^/]*)$', 'auth.views.login_user'),