You cannot select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

122 lines
3.4 KiB
Python

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