/
__init__.py
229 lines (181 loc) · 6.93 KB
/
__init__.py
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__author__ = 'martinjr'
__all__ = ["Kosapy"]
import xml.sax
import requests
import requests_cache
import re
from datetime import datetime, date
HEADERS={"content-type": "applicaion/xml;encoding=utf-8",
"accept-language": "cs"}
requests_cache.install_cache('kosapy_cache', expire_after=24*60*60)
class Kosapy:
def __init__(self, url, auth, verbose=False):
self._kosapi=url
self._auth=auth
self._verbose=verbose
self._resources={}
def __getattr__(self, item):
if item not in self._resources:
self._resources[item]=Resource(item, self)
return self._resources[item]
def get_feed(self, location, params={}):
if self._verbose:
print("Fetching "+self._kosapi+location)
r=requests.get(self._kosapi+location, auth=self._auth, params=params, headers=HEADERS)
r.encoding='utf-8'
if r.status_code!=200:
if r.status_code==403:
raise Exception('Wrong authentication')
elif r.status_code==404:
raise Exception('Resource %s not found'%location)
elif r.status_code>=500:
raise Exception('Internal error')
else:
raise Exception('Error %d requesting %s'%(r.status_code, location))
return ObjectiveKosapiDoc(bytes(r.text, 'utf-8'), self)
def get_contents(self, feed):
feed=(feed.get("atom:feed") if feed.get("atom:feed") else feed).get("atom:entry")
if not feed:
return ()
for e in feed:
c=e.get("atom:content")
selff=e.get("atom:link", rel="self")
if selff:
href=selff("href")
if href[-1]=="/":
href=href[:-1]
c.resource=Resource(href, self)
return (e.get("atom:content") for e in feed) if feed else ()
def use_cache(self, use):
if use:
requests_cache.install_cache('kosapy_cache', expire_after=24*60*60)
else:
requests_cache.uninstall_cache()
class Resource:
def __init__(self, location, api):
self._location=location
self._params={}
self._children={}
self._api=api
self._content=None
def __call__(self, **kwargs):
if kwargs:
self._params=kwargs
return self
else:
if not self._content:
self._content=self._api.get_contents(self._api.get_feed(self._location, self._params)).__next__()
return self._content
def __iter__(self):
feed=self._api.get_feed(self._location, self._params)
while True:
for entry in self._api.get_contents(feed):
yield entry
if feed.get("atom:feed") and feed.get("atom:feed").get("atom:link", rel="next"):
feed=self._api.get_feed(feed.get("atom:feed").get("atom:link", rel="next")("href"))
else:
break
def get(self, item):
return self.__getattr__(item)
def __getattr__(self, item):
if item not in self._children:
self._children[item]=Resource(self._location+"/"+item, self._api)
return self._children[item]
def __repr__(self):
return "<KosAPI resource "+self._location+">"
class ObjectiveKosapiDoc:
def __init__(self, doc, api):
self._api=api
self._root=KosapiElement("root", (), api)
if doc:
self._parse_doc(doc)
def __getattr__(self, item):
return self._root.__getattr__(item)
def __call__(self, *args, **kwargs):
return self._root.__call__(*args, **kwargs)
def get(self, item):
return self.__getattr__(item)
def _parse_doc(self, doc):
xml.sax.parseString(doc, KosapiSaxHandler(self._root, self._api))
class KosapiElement:
_redatetime=re.compile("^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}$")
_redate=re.compile("^\d{4}-\d{2}-\d{2}$")
_rebool=re.compile("^true$|^false$")
_redigit=re.compile("^\d+$")
def __init__(self, name, attrs, api):
self._content=""
self._content_parsed=""
self._name=name
self._attrs=attrs
self._children={}
self._ref=None
self._api=api
def __getattr__(self, item):
if "xlink:href" in self._attrs:
if not self._ref:
self._ref=Resource(self._attrs.getValue("xlink:href"), self._api)
return self._ref().get(item)
if item in self._children:
return self._children[item]
else:
return ()
def __call__(self, attr="", raw=False):
if not attr:
if not self._content_parsed:
self._parse_content()
return self._content if raw else self._content_parsed
elif attr in self._attrs:
return self._attrs.getValue(attr)
else:
return False
def __iter__(self):
yield self
def get(self, item, **kwargs):
if kwargs and item in self._children:
for el in self._children[item]:
for attr, value in kwargs.items():
if el(attr)==value:
return el
else:
return self.__getattr__(item)
def __repr__(self):
return "<KosAPI entry "+self._name+">"
def _parse_content(self):
if self._redigit.match(self._content):
self._content_parsed=int(self._content)
elif self._redatetime.match(self._content):
self._content_parsed=datetime.strptime(self._content, "%Y-%m-%dT%H:%M:%S")
elif self._redate.match(self._content):
self._content_parsed=datetime.strptime(self._content, "%Y-%m-%d").date()
elif self._rebool.match(self._content):
self._content_parsed=self._content.lower()=="true"
else:
self._content_parsed=self._content
def add_element(self, element):
if element._name in self._children:
if isinstance(self._children[element._name], list):
self._children[element._name].append(element)
else:
self._children[element._name]=[self._children[element._name], element]
else:
self._children[element._name]=element
def traverse(self):
if self._children:
print(self._name)
for name, child in self._children.items():
for sub in child:
sub.traverse()
else:
print("%s: %s (%s)"%(self._name, self._content, str(self._attrs.getNames())))
class KosapiSaxHandler(xml.sax.ContentHandler):
def __init__(self, root, api):
self.path=[root]
self._api=api
def startElement(self, name, attrs):
element=KosapiElement(name, attrs, self._api)
self.path[-1].add_element(element)
self.path.append(element)
def endElement(self, name):
self.path.pop()
def characters(self, content):
self.path[-1]._content+=content.strip()