forked from coleifer/micawber
/
providers.py
273 lines (211 loc) · 9.3 KB
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providers.py
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import hashlib
import pickle
import re
import socket
import ssl
from .compat import get_charset
from .compat import HTTPError
from .compat import OrderedDict
from .compat import Request
from .compat import urlencode
from .compat import URLError
from .compat import urlopen
try:
import simplejson as json
try:
InvalidJson = json.JSONDecodeError
except AttributeError:
InvalidJson = ValueError
except ImportError:
import json
InvalidJson = ValueError
from micawber.exceptions import InvalidResponseException
from micawber.exceptions import ProviderException
from micawber.exceptions import ProviderNotFoundException
class Provider(object):
socket_timeout = 3.0
user_agent = 'python-micawber'
def __init__(self, endpoint, **kwargs):
self.endpoint = endpoint
self.base_params = {'format': 'json'}
self.base_params.update(kwargs)
def fetch(self, url):
socket.setdefaulttimeout(self.socket_timeout)
req = Request(url, headers={'User-Agent': self.user_agent})
try:
resp = fetch(req)
except URLError:
return False
except HTTPError:
return False
except socket.timeout:
return False
except ssl.SSLError:
return False
return resp
def encode_params(self, url, **extra_params):
params = dict(self.base_params)
params.update(extra_params)
params['url'] = url
return urlencode(sorted(params.items()))
def request(self, url, **extra_params):
encoded_params = self.encode_params(url, **extra_params)
endpoint_url = self.endpoint
if '?' in endpoint_url:
endpoint_url = '%s&%s' % (endpoint_url.rstrip('&'), encoded_params)
else:
endpoint_url = '%s?%s' % (endpoint_url, encoded_params)
response = self.fetch(endpoint_url)
if response:
return self.handle_response(response, url)
else:
raise ProviderException('Error fetching "%s"' % endpoint_url)
def handle_response(self, response, url):
try:
json_data = json.loads(response)
except InvalidJson as exc:
try:
msg = exc.message
except AttributeError:
msg = exc.args[0]
raise InvalidResponseException(msg)
if 'url' not in json_data:
json_data['url'] = url
if 'title' not in json_data:
json_data['title'] = json_data['url']
return json_data
def make_key(*args, **kwargs):
return hashlib.md5(pickle.dumps((args, kwargs))).hexdigest()
def url_cache(fn):
def inner(self, url, **params):
if self.cache:
key = make_key(url, params)
data = self.cache.get(key)
if not data:
data = fn(self, url, **params)
self.cache.set(key, data)
return data
return fn(self, url, **params)
return inner
def fetch(request):
resp = urlopen(request)
if resp.code < 200 or resp.code >= 300:
return False
# by RFC, default HTTP charset is ISO-8859-1
charset = get_charset(resp) or 'iso-8859-1'
content = resp.read().decode(charset)
resp.close()
return content
class ProviderRegistry(object):
def __init__(self, cache=None):
self._registry = OrderedDict()
self.cache = cache
def register(self, regex, provider):
self._registry[regex] = provider
def unregister(self, regex):
del self._registry[regex]
def __iter__(self):
return iter(reversed(list(self._registry.items())))
def provider_for_url(self, url):
for regex, provider in self:
if re.match(regex, url):
return provider
@url_cache
def request(self, url, **params):
provider = self.provider_for_url(url)
if provider:
return provider.request(url, **params)
raise ProviderNotFoundException('Provider not found for "%s"' % url)
def bootstrap_basic(cache=None, registry=None):
# complements of oembed.com#section7
pr = registry or ProviderRegistry(cache)
# b
pr.register('http://blip.tv/\S+', Provider('http://blip.tv/oembed'))
# c
pr.register('http://chirb.it/\S+', Provider('http://chirb.it/oembed.json'))
pr.register('https://www.circuitlab.com/circuit/\S+', Provider('https://www.circuitlab.com/circuit/oembed'))
pr.register('http://www.collegehumor.com/video/\S+', Provider('http://www.collegehumor.com/oembed.json'))
# d
pr.register('https?://(www\.)?dailymotion\.com/\S+', Provider('http://www.dailymotion.com/services/oembed'))
# f
pr.register('https?://\S*?flickr.com/\S+', Provider('https://www.flickr.com/services/oembed/'))
pr.register('https?://flic\.kr/\S*', Provider('https://www.flickr.com/services/oembed/'))
pr.register('https?://(www\.)?funnyordie\.com/videos/\S+', Provider('http://www.funnyordie.com/oembed'))
# g
pr.register(r'https?://gist.github.com/\S*', Provider('https://github.com/api/oembed'))
# h
pr.register('http://www.hulu.com/watch/\S+', Provider('http://www.hulu.com/api/oembed.json'))
# i
pr.register('http://www.ifixit.com/Guide/View/\S+', Provider('http://www.ifixit.com/Embed'))
pr.register('http://\S*imgur\.com/\S+', Provider('http://api.imgur.com/oembed')),
pr.register('https?://instagr(\.am|am\.com)/p/\S+', Provider('http://api.instagram.com/oembed'))
# j
pr.register('http://www.jest.com/(video|embed)/\S+', Provider('http://www.jest.com/oembed.json'))
# m
pr.register('http://www.mobypicture.com/user/\S*?/view/\S*', Provider('http://api.mobypicture.com/oEmbed'))
pr.register('http://moby.to/\S*', Provider('http://api.mobypicture.com/oEmbed'))
# p
pr.register('http://i\S*.photobucket.com/albums/\S+', Provider('http://photobucket.com/oembed'))
pr.register('http://gi\S*.photobucket.com/groups/\S+', Provider('http://photobucket.com/oembed'))
pr.register('http://www.polleverywhere.com/(polls|multiple_choice_polls|free_text_polls)/\S+', Provider('http://www.polleverywhere.com/services/oembed/'))
pr.register('https?://(.+\.)?polldaddy\.com/\S*', Provider('http://polldaddy.com/oembed/'))
# q
pr.register('http://qik.com/video/\S+', Provider('http://qik.com/api/oembed.json'))
# r
pr.register('http://\S*.revision3.com/\S+', Provider('http://revision3.com/api/oembed/'))
# s
pr.register('http://www.slideshare.net/[^\/]+/\S+', Provider('http://www.slideshare.net/api/oembed/2'))
pr.register('http://slidesha\.re/\S*', Provider('http://www.slideshare.net/api/oembed/2'))
pr.register('http://\S*.smugmug.com/\S*', Provider('http://api.smugmug.com/services/oembed/'))
pr.register('https://\S*?soundcloud.com/\S+', Provider('http://soundcloud.com/oembed'))
pr.register('https?://speakerdeck\.com/\S*', Provider('https://speakerdeck.com/oembed.json')),
pr.register('https?://(www\.)?scribd\.com/\S*', Provider('http://www.scribd.com/services/oembed'))
# t
pr.register('https?://(www\.)?twitter.com/\S+/status(es)?/\S+', Provider('https://api.twitter.com/1/statuses/oembed.json'))
# v
pr.register('http://\S*.viddler.com/\S*', Provider('http://lab.viddler.com/services/oembed/'))
pr.register('http://vimeo.com/\S+', Provider('http://vimeo.com/api/oembed.json'))
pr.register('https://vimeo.com/\S+', Provider('https://vimeo.com/api/oembed.json'))
# y
pr.register('http://(\S*.)?youtu(\.be/|be\.com/watch)\S+', Provider('http://www.youtube.com/oembed'))
pr.register('https://(\S*.)?youtu(\.be/|be\.com/watch)\S+', Provider('http://www.youtube.com/oembed?scheme=https&'))
pr.register('http://(\S*\.)?yfrog\.com/\S*', Provider('http://www.yfrog.com/api/oembed'))
# w
pr.register('http://\S+.wordpress.com/\S+', Provider('http://public-api.wordpress.com/oembed/'))
pr.register('https?://wordpress.tv/\S+', Provider('http://wordpress.tv/oembed/'))
return pr
def bootstrap_embedly(cache=None, registry=None, **params):
endpoint = 'http://api.embed.ly/1/oembed'
schema_url = 'http://api.embed.ly/1/services/python'
pr = registry or ProviderRegistry(cache)
# fetch the schema
contents = fetch(schema_url)
json_data = json.loads(contents)
for provider_meta in json_data:
for regex in provider_meta['regex']:
pr.register(regex, Provider(endpoint, **params))
return pr
def bootstrap_noembed(cache=None, registry=None, **params):
endpoint = 'http://noembed.com/embed'
schema_url = 'http://noembed.com/providers'
pr = registry or ProviderRegistry(cache)
# fetch the schema
contents = fetch(schema_url)
json_data = json.loads(contents)
for provider_meta in json_data:
for regex in provider_meta['patterns']:
pr.register(regex, Provider(endpoint, **params))
return pr
def bootstrap_oembedio(cache=None, registry=None, **params):
endpoint = 'http://oembed.io/api'
schema_url = 'http://oembed.io/providers'
pr = registry or ProviderRegistry(cache)
# fetch the schema
contents = fetch(schema_url)
json_data = json.loads(contents)
for provider_meta in json_data:
regex = provider_meta['s']
if not regex.startswith('http'):
regex = 'https?://(?:www\.)?' + regex
pr.register(regex, Provider(endpoint, **params))
return pr