67 lines
1.5 KiB
Python
67 lines
1.5 KiB
Python
import json
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import base64
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import struct
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def to_bytes(x, charset='utf-8', errors='strict'):
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if x is None:
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return None
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if isinstance(x, bytes):
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return x
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if isinstance(x, str):
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return x.encode(charset, errors)
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if isinstance(x, (int, float)):
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return str(x).encode(charset, errors)
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return bytes(x)
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def to_unicode(x, charset='utf-8', errors='strict'):
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if x is None or isinstance(x, str):
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return x
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if isinstance(x, bytes):
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return x.decode(charset, errors)
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return str(x)
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def to_native(x, encoding='ascii'):
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if isinstance(x, str):
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return x
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return x.decode(encoding)
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def json_loads(s):
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return json.loads(s)
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def json_dumps(data, ensure_ascii=False):
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return json.dumps(data, ensure_ascii=ensure_ascii, separators=(',', ':'))
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def urlsafe_b64decode(s):
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s += b'=' * (-len(s) % 4)
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return base64.urlsafe_b64decode(s)
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def urlsafe_b64encode(s):
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return base64.urlsafe_b64encode(s).rstrip(b'=')
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def base64_to_int(s):
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data = urlsafe_b64decode(to_bytes(s, charset='ascii'))
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buf = struct.unpack('%sB' % len(data), data)
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return int(''.join(["%02x" % byte for byte in buf]), 16)
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def int_to_base64(num):
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if num < 0:
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raise ValueError('Must be a positive integer')
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s = num.to_bytes((num.bit_length() + 7) // 8, 'big', signed=False)
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return to_unicode(urlsafe_b64encode(s))
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def json_b64encode(text):
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if isinstance(text, dict):
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text = json_dumps(text)
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return urlsafe_b64encode(to_bytes(text))
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