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Support custom encoding for StringSession

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This commit is contained in:
Lonami Exo 2018-08-22 16:11:51 +02:00
parent aa9bc9080f
commit 8e62f797bb
1 changed files with 11 additions and 3 deletions
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14
telethon/sessions/string.py
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@ -15,7 +15,15 @@ class StringSession(MemorySession):
It is thought to be used where you don't want to create any on-disk
files but would still like to be able to save and load existing sessions
by other means.
You can use custom `encode` and `decode` functions, if present:
* `encode` definition must be ``def encode(value: bytes) -> str:``.
* `decode` definition must be ``def decode(value: str) -> bytes:``.
"""
encode = lambda x: base64.urlsafe_b64encode(x).decode('ascii')
decode = base64.urlsafe_b64decode
def __init__(self, string=None):
super().__init__()
if string:
@ -25,7 +33,7 @@ class StringSession(MemorySession):
string = string[1:]
ip_len = 4 if len(string) == 352 else 16
self._dc_id, ip, self._port, key = struct.unpack(
'>B{}sH256s'.format(ip_len), base64.urlsafe_b64decode(string))
'>B{}sH256s'.format(ip_len), StringSession.decode(string))
self._server_address = ipaddress.ip_address(ip).compressed
if any(key):
@ -36,10 +44,10 @@ class StringSession(MemorySession):
return ''
ip = ipaddress.ip_address(self._server_address).packed
return CURRENT_VERSION + base64.urlsafe_b64encode(struct.pack(
return CURRENT_VERSION + StringSession.encode(struct.pack(
'>B{}sH256s'.format(len(ip)),
self._dc_id,
ip,
self._port,
self._auth_key.key
)).decode('ascii')
))