def __call__(self, get_resource, app, orig_req):
url = urllib.parse.urljoin(orig_req.url, self.url)
doc_resp = get_resource(url)
if doc_resp.status_int == 304 and self._response is not None:
doc_resp = self._response
elif doc_resp.status_int == 200:
self._response = doc_resp
else:
## FIXME: better error
assert 0, "Bad response: %r" % doc_resp
## FIXME: better content-type detection
if doc_resp.content_type not in (
'application/xml',
'text/xml',
):
## FIXME: better error
assert 0, "Bad response content-type: %s (from response %r)" % (
doc_resp.content_type, doc_resp)
doc_text = doc_resp.body
try:
doc = XML(doc_text, base_url=url)
except XMLSyntaxError as e:
raise Exception('Invalid syntax in %s: %s' % (url, e))
assert doc.tag == 'ruleset', ('Bad rule tag <%s> in document %s' %
(doc.tag, url))
return RuleSet.parse_xml(doc, url)
def parse_xml(cls, el, source_location):
"""Parse an instance from an XML/etree element"""
proxies = []
for child in el:
if child.tag == "proxy":
proxies.append(Proxy.parse_xml(child, source_location))
ruleset = RuleSet.parse_xml(el, source_location)
return cls(proxies, ruleset, source_location)
def parse_xml(cls, el, source_location):
"""Parse an instance from an XML/etree element"""
proxies = []
for child in el:
if child.tag == 'proxy':
proxies.append(Proxy.parse_xml(child, source_location))
ruleset = RuleSet.parse_xml(el, source_location)
return cls(proxies, ruleset, source_location)
def parse_xml(cls, el, source_location,
middleware_factory=None,
middleware_factory_kwargs=None):
"""Parse an instance from an XML/etree element"""
proxies = []
for child in el:
if child.tag == 'proxy':
proxies.append(Proxy.parse_xml(child, source_location))
ruleset = RuleSet.parse_xml(el, source_location)
return cls(proxies, ruleset, source_location,
middleware_factory=middleware_factory,
middleware_factory_kwargs=middleware_factory_kwargs)
def load_rules(self):
filename = self.filename
try:
fp = open(filename)
doc = parse(fp, base_url='file://' +
os.path.abspath(filename)).getroot()
fp.close()
except XMLSyntaxError as e:
raise Exception('Invalid syntax in %s: %s' % (filename, e))
assert doc.tag == 'ruleset', ('Bad rule tag <%s> in document %s' %
(doc.tag, filename))
assert doc.tag == 'ruleset', ('Bad rule tag <%s> in document %s' %
(doc.tag, filename))
self.ruleset = RuleSet.parse_xml(doc, filename)
def parse_xml(cls,
el,
source_location,
middleware_factory=None,
middleware_factory_kwargs=None):
"""Parse an instance from an XML/etree element"""
proxies = []
for child in el:
if child.tag == 'proxy':
proxies.append(Proxy.parse_xml(child, source_location))
ruleset = RuleSet.parse_xml(el, source_location)
return cls(proxies,
ruleset,
source_location,
middleware_factory=middleware_factory,
middleware_factory_kwargs=middleware_factory_kwargs)
class FileRuleGetter(object):
"""
An implementation of `rule_getter` for `DeliveranceMiddleware`.
This reads the rules from a file.
If always_reload=True, the file will be re-read on every request.
"""
def load_rules(self):
filename = self.filename
try:
fp = open(filename)
doc = parse(fp, base_url='file://' +
os.path.abspath(filename)).getroot()
fp.close()
except XMLSyntaxError, e:
raise Exception('Invalid syntax in %s: %s' % (filename, e))
assert doc.tag == 'ruleset', ('Bad rule tag <%s> in document %s' %
(doc.tag, filename))
assert doc.tag == 'ruleset', ('Bad rule tag <%s> in document %s' %
(doc.tag, filename))
self.ruleset = RuleSet.parse_xml(doc, filename)
class SubrequestRuleGetter(object):
"""
An implementation of `rule_getter` for `DeliveranceMiddleware`.
This retrieves and instantiates the rules using a subrequest with
the given url.
"""
_response = None
def __init__(self, url):
self.url = url
def __call__(self, get_resource, app, orig_req):
url = urlparse.urljoin(orig_req.url, self.url)
doc_resp = get_resource(url)
if doc_resp.status_int == 304 and self._response is not None:
doc_resp = self._response
elif doc_resp.status_int == 200:
self._response = doc_resp
else:
## FIXME: better error
assert 0, "Bad response: %r" % doc_resp
## FIXME: better content-type detection
if doc_resp.content_type not in (
'application/xml',
'text/xml',
):
## FIXME: better error
assert 0, "Bad response content-type: %s (from response %r)" % (
doc_resp.content_type, doc_resp)
doc_text = doc_resp.body
try:
doc = XML(doc_text, base_url=url)
except XMLSyntaxError, e:
raise Exception('Invalid syntax in %s: %s' % (url, e))
assert doc.tag == 'ruleset', ('Bad rule tag <%s> in document %s' %
(doc.tag, url))
return RuleSet.parse_xml(doc, url)
def __call__(self, get_resource, app, orig_req):
return RuleSet.parse_xml(fromstring(self.rules), '')