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Support base64-encoded nested messages #10

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Support base64-encoded nested messages #10

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11 changes: 11 additions & 0 deletions protobuf_inspector/types.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,8 @@
from .parser import Parser, fg0, fg1, fg2, fg3, fg4, fg5, fg6, fg7, fg8, fg9, dim, bold
from struct import unpack
from io import BytesIO
from base64 import urlsafe_b64decode
from urllib.parse import unquote

# Code that implements and registers the usual native types (high
# level parsing and formatting) into the barebones Parser.
Expand Down Expand Up @@ -122,6 +124,15 @@ def parse_chunk(self, file, type):
except Exception:
pass

# Attempt to decode as urlencoded, possibly unpadded, (urlsafe-)base64 encoded message
try:
return "%s => base64 encoded %s" % (
fg2('"%s"' % chunk.decode('ascii')),
self.parse_message(BytesIO(urlsafe_b64decode(unquote(chunk) + "==")), "message")
)
except Exception as e:
pass

# Attempt to decode packed repeated chunks
try:
if len(chunk) >= 5:
Expand Down