Invalid chunk encoding in HTTP response

Invalid chunk encoding

$ python -c "import requests; requests.get('http://badchunk.example.com', stream=True).raw.read()"
Traceback (most recent call last):
  ...
urllib3.exceptions.ProtocolError: ('Connection aborted.', InvalidChunkLength(got_length=b'ZZ', expected=hex))

Why this happens

The server violates HTTP/1.1 chunked transfer-encoding format. Clients cannot parse non-hex chunk sizes or malformed trailers.

Fix

• Fix server to emit valid chunk sizes and trailers.
• Avoid stream=True if server is known broken; let Requests buffer and possibly recover.

Wrong code

import requests
resp = requests.get("http://badchunk.example.com", stream=True)
print(resp.raw.read())  # triggers decode error

Fixed code

import requests
# Prefer non-streamed reads when server is flaky
resp = requests.get("http://good.example.com")
print(len(resp.content))