166 lines
4.1 KiB
Python
166 lines
4.1 KiB
Python
# -*- coding: utf-8 -*-
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# vi:si:et:sw=4:sts=4:ts=4
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from __future__ import division
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import os
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import Image
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from StringIO import StringIO
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import re
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import stdnum.isbn
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import socket
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import cStringIO
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import gzip
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import time
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from datetime import datetime
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import ox
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import ed25519
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from meta.utils import normalize_isbn, find_isbns
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import logging
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logger = logging.getLogger('oml.utils')
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ENCODING='base64'
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def valid_olid(id):
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return id.startswith('OL') and id.endswith('M')
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def get_positions(ids, pos):
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'''
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>>> get_positions([1,2,3,4], [2,4])
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{2: 1, 4: 3}
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'''
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positions = {}
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for i in pos:
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try:
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positions[i] = ids.index(i)
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except:
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pass
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return positions
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def get_by_key(objects, key, value):
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obj = filter(lambda o: o.get(key) == value, objects)
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return obj and obj[0] or None
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def get_by_id(objects, id):
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return get_by_key(objects, 'id', id)
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def resize_image(data, width=None, size=None):
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source = Image.open(StringIO(data))
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if source.mode == 'P':
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source = source.convert('RGB')
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source_width = source.size[0]
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source_height = source.size[1]
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if size:
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if source_width > source_height:
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width = size
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height = int(width / (float(source_width) / source_height))
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height = height - height % 2
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else:
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height = size
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width = int(height * (float(source_width) / source_height))
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width = width - width % 2
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else:
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height = int(width / (float(source_width) / source_height))
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height = height - height % 2
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width = max(width, 1)
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height = max(height, 1)
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if width < source_width:
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resize_method = Image.ANTIALIAS
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else:
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resize_method = Image.BICUBIC
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output = source.resize((width, height), resize_method)
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o = StringIO()
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output.save(o, format='jpeg')
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data = o.getvalue()
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o.close()
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return data
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def sort_title(title):
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title = title.replace(u'Æ', 'Ae')
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if isinstance(title, str):
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title = unicode(title)
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title = ox.sort_string(title)
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#title
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title = re.sub(u'[\'!¿¡,\.;\-"\:\*\[\]]', '', title)
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return title.strip()
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def get_position_by_id(list, key):
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for i in range(0, len(list)):
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if list[i]['id'] == key:
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return i
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return -1
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def valid(key, value, sig):
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'''
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validate that value was signed by key
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'''
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vk = ed25519.VerifyingKey(str(key), encoding=ENCODING)
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try:
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vk.verify(str(sig), str(value), encoding=ENCODING)
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#except ed25519.BadSignatureError:
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except:
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return False
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return True
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def get_public_ipv6():
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try:
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host = ('2a01:4f8:120:3201::3', 25519)
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s = socket.socket(socket.AF_INET6, socket.SOCK_DGRAM)
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s.settimeout(1)
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s.connect(host)
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ip = s.getsockname()[0]
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s.close()
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except:
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ip = None
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return ip
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def update_dict(root, data):
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for key in data:
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keys = map(lambda part: part.replace('\0', '\\.'), key.replace('\\.', '\0').split('.'))
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value = data[key]
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p = root
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while len(keys)>1:
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key = keys.pop(0)
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if isinstance(p, list):
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p = p[get_position_by_id(p, key)]
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else:
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if key not in p:
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p[key] = {}
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p = p[key]
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if value == None and keys[0] in p:
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del p[keys[0]]
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else:
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p[keys[0]] = value
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def remove_empty_folders(prefix):
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empty = []
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for root, folders, files in os.walk(prefix):
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if not folders and not files:
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empty.append(root)
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for folder in empty:
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remove_empty_tree(folder)
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def remove_empty_tree(leaf):
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while leaf:
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if not os.path.exists(leaf):
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leaf = os.path.dirname(leaf)
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elif os.path.isdir(leaf) and not os.listdir(leaf):
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logger.debug('rmdir %s', leaf)
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os.rmdir(leaf)
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else:
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break
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utc_0 = int(time.mktime(datetime(1970, 01, 01).timetuple()))
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def datetime2ts(dt):
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return int(time.mktime(dt.utctimetuple())) - utc_0
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def ts2datetime(ts):
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return datetime.utcfromtimestamp(float(ts))
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