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122 lines
3.4 KiB
Python
122 lines
3.4 KiB
Python
5 years ago
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#### PATTERN | WEB | OAUTH #########################################################################
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# -*- coding: utf-8 -*-
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# Copyright (c) 2010 University of Antwerp, Belgium
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# Author: Tom De Smedt <tom@organisms.be>
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# License: BSD (see LICENSE.txt for details).
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# http://www.clips.ua.ac.be/pages/pattern
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####################################################################################################
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# Naive OAuth implementation for pattern.web.Yahoo and Yahoo! BOSS v2.
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from __future__ import unicode_literals
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from __future__ import division
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from builtins import str, bytes, dict, int
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from builtins import map, zip, filter
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from builtins import object, range
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try:
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# Python 3
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from urllib.parse import urlencode
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from urllib.parse import quote as urlquote
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except ImportError:
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from urllib import urlencode
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from urllib import quote as urlquote
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import hmac
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import time
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import random
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import base64
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try:
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from hashlib import sha1
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from hashlib import md5
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except:
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import sha as sha1
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import md5
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md5 = md5.new
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_diacritics = {
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"a": ("á", "ä", "â", "à", "å"),
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"e": ("é", "ë", "ê", "è"),
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"i": ("í", "ï", "î", "ì"),
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"o": ("ó", "ö", "ô", "ò", "ō", "ø"),
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"u": ("ú", "ü", "û", "ù", "ů"),
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"y": ("ý", "ÿ", "ý"),
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"s": ("š",),
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"c": ("ç", "č"),
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"n": ("ñ",),
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"z": ("ž",)
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}
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####################################################################################################
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def HMAC_SHA1(key, text):
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return hmac.new(key.encode("utf-8"), text.encode("utf-8"), sha1).digest()
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def nonce():
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return md5(str(time.time()).encode("utf-8") + str(random.random()).encode("utf-8")).hexdigest()
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def timestamp():
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return int(time.time())
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def escape(string):
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return urlquote(string, safe=b"~")
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def utf8(string):
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return isinstance(string, str) and string.encode("utf-8") or str(string)
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def normalize(string):
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# Normalize accents (é => e) for services that have problems with utf-8
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# (used to be the case with Yahoo BOSS but this appears to be fixed now).
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string = utf8(string)
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for k, v in _diacritics.items():
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for v in v:
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string = string.replace(v, k)
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return string
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def base(url, data={}, method="GET"):
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# Signature base string: http://tools.ietf.org/html/rfc5849#section-3.4.1
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base = escape(utf8(method.upper())) + "&"
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base += escape(utf8(url.rstrip("?"))) + "&"
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base += escape(utf8("&".join(["%s=%s" % (
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escape(utf8(k)),
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escape(utf8(v))) for k, v in sorted(data.items())])))
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return base
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def sign(url, data={}, method="GET", secret="", token="", hash=HMAC_SHA1):
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# HMAC-SHA1 signature algorithm: http://tools.ietf.org/html/rfc5849#section-3.4.2
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signature = escape(utf8(secret)) + "&" + escape(utf8(token))
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signature = hash(signature, base(url, data, method))
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signature = base64.b64encode(signature)
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return signature.decode("utf-8")
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#CONSUMER_KEY = ""
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#CONSUMER_SECRET = ""
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#
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#q = "cats"
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#url = "http://yboss.yahooapis.com/ysearch/web"
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#data = {
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# "q": normalize(q),
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# "start": 0,
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# "count": 50,
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# "format": "json",
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# "oauth_version": "1.0",
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# "oauth_nonce": nonce(),
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# "oauth_timestamp": timestamp(),
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# "oauth_consumer_key": CONSUMER_KEY,
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# "oauth_signature_method": "HMAC-SHA1"
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#}
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#data["oauth_signature"] = sign(url, data, secret=CONSUMER_SECRET)
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#data = dict((k, utf8(v)) for k, v in data.items())
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#
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#print(url + "?" + urlencode(data))
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