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authorJesús <heckyel@hyperbola.info>2020-12-15 21:52:04 -0500
committerJesús <heckyel@hyperbola.info>2020-12-15 21:52:04 -0500
commitb9a3082e7c654d97cecc5410c086e13a7b046909 (patch)
treedc093ccb2246e7df0beaca5deb8b7467620b74a2 /youtube/proto.py
parentf4b36a220d085080a881dbe2f63e51b2fb28a003 (diff)
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Diffstat (limited to 'youtube/proto.py')
-rw-r--r--youtube/proto.py18
1 files changed, 11 insertions, 7 deletions
diff --git a/youtube/proto.py b/youtube/proto.py
index 5fd16d5..ff59eac 100644
--- a/youtube/proto.py
+++ b/youtube/proto.py
@@ -2,6 +2,7 @@ from math import ceil
import base64
import io
+
def byte(n):
return bytes((n,))
@@ -19,7 +20,7 @@ def varint_encode(offset):
for i in range(0, needed_bytes - 1):
encoded_bytes[i] = (offset & 127) | 128 # 7 least significant bits
offset = offset >> 7
- encoded_bytes[-1] = offset & 127 # leave first bit as zero for last byte
+ encoded_bytes[-1] = offset & 127 # leave first bit as zero for last byte
return bytes(encoded_bytes)
@@ -37,18 +38,18 @@ def varint_decode(encoded):
def string(field_number, data):
data = as_bytes(data)
return _proto_field(2, field_number, varint_encode(len(data)) + data)
+
+
nested = string
+
def uint(field_number, value):
return _proto_field(0, field_number, varint_encode(value))
-
-
def _proto_field(wire_type, field_number, data):
''' See https://developers.google.com/protocol-buffers/docs/encoding#structure '''
- return varint_encode( (field_number << 3) | wire_type) + data
-
+ return varint_encode((field_number << 3) | wire_type) + data
def percent_b64encode(data):
@@ -58,6 +59,7 @@ def percent_b64encode(data):
def unpadded_b64encode(data):
return base64.urlsafe_b64encode(data).replace(b'=', b'')
+
def as_bytes(value):
if isinstance(value, str):
return value.encode('utf-8')
@@ -90,6 +92,7 @@ def read_group(data, end_sequence):
data.seek(index + len(end_sequence))
return data.original[start:index]
+
def read_protobuf(data):
data_original = data
data = io.BytesIO(data)
@@ -118,12 +121,13 @@ def read_protobuf(data):
raise Exception("Unknown wire type: " + str(wire_type) + ", Tag: " + bytes_to_hex(succinct_encode(tag)) + ", at position " + str(data.tell()))
yield (wire_type, field_number, value)
+
def parse(data):
return {field_number: value for _, field_number, value in read_protobuf(data)}
+
def b64_to_bytes(data):
if isinstance(data, bytes):
data = data.decode('ascii')
data = data.replace("%3D", "=")
- return base64.urlsafe_b64decode(data + "="*((4 - len(data)%4)%4) )
-
+ return base64.urlsafe_b64decode(data + "="*((4 - len(data)%4)%4))