245,258c245,259
<                 if amt is None:
<                     value = value + self._safe_read(chunk_left)
<                 elif amt < chunk_left:
<                     value = value + self._safe_read(amt)
<                     self.chunk_left = chunk_left - amt
<                     return value
<                 elif amt == chunk_left:
<                     value = value + self._safe_read(amt)
<                     self._safe_read(2)  # toss the CRLF at the end of the chunk
<                     self.chunk_left = None
<                     return value
<                 else:
<                     value = value + self._safe_read(chunk_left)
<                     amt = amt - chunk_left
---
>                 if chunk_left is not _UNKNOWN:
>                     if amt is None:
>                         value = value + self._safe_read(chunk_left)
>                     elif amt < chunk_left:
>                         value = value + self._safe_read(amt)
>                         self.chunk_left = chunk_left - amt
>                         return value
>                     elif amt == chunk_left:
>                         value = value + self._safe_read(amt)
>                         self._safe_read(2)  # toss the CRLF at the end of the chunk
>                         self.chunk_left = None
>                         return value
>                     else:
>                         value = value + self._safe_read(chunk_left)
>                         amt = amt - chunk_left