+def recv_chunk_old(sock): # -> bytearray:
+ """
+ Compatible with Python 2.6, but less efficient.
+ """
+ buf = sock.recv(8) # Scan for an up to 16MiB chunk size (0xffffff).
+ crlf = buf.find(b'\r\n') # Find the HTTP chunk size.
+
+ if crlf > 0: # If there is a length, then process it
+
+ remaining = int(buf[:crlf], 16) # Decode the chunk size.
+
+ start = crlf + 2 # Add in the length of the header's CRLF pair.
+ end = len(buf) - start
+
+ chunk = bytearray(remaining)
+
+ if remaining <= 2: # E.g. an HTTP chunk with just a keep-alive delimiter or end of stream (0).
+ chunk[:remaining] = buf[start:start + remaining]
+ # There are several edge cases (remaining == [3-6]) as the chunk size exceeds the length
+ # of the initial read of 8 bytes. With Twitter, these do not, in practice, occur. The
+ # shortest JSON message starts with '{"limit":{'. Hence, it exceeds in size the edge cases
+ # and eliminates the need to address them.
+ else: # There is more to read in the chunk.
+ chunk[:end] = buf[start:]
+ chunk[end:] = sock.recv(max(0, remaining - end))
+ sock.recv(2) # Read the trailing CRLF pair. Throw it away.
+
+ return chunk
+
+ return bytearray()
+
+## recv_chunk_old()
+
+def recv_chunk_new(sock): # -> bytearray:
+ """
+ Compatible with Python 2.7+.
+ """
+ header = sock.recv(8) # Scan for an up to 16MiB chunk size (0xffffff).
+ crlf = header.find(b'\r\n') # Find the HTTP chunk size.
+
+ if crlf > 0: # If there is a length, then process it
+
+ size = int(header[:crlf], 16) # Decode the chunk size. Rarely exceeds 8KiB.
+ chunk = bytearray(size)
+ start = crlf + 2 # Add in the length of the header's CRLF pair.
+
+ if size <= 3: # E.g. an HTTP chunk with just a keep-alive delimiter or end of stream (0).
+ chunk[:size] = header[start:start + size]
+ # There are several edge cases (size == [4-6]) as the chunk size exceeds the length
+ # of the initial read of 8 bytes. With Twitter, these do not, in practice, occur. The
+ # shortest JSON message starts with '{"limit":{'. Hence, it exceeds in size the edge cases
+ # and eliminates the need to address them.
+ else: # There is more to read in the chunk.
+ end = len(header) - start
+ chunk[:end] = header[start:]
+ buffer = memoryview(chunk)[end:] # Create a view into the bytearray to hold the rest of the chunk.
+ sock.recv_into(buffer)
+ sock.recv(2) # Read the trailing CRLF pair. Throw it away.
+
+ return chunk
+
+ return bytearray()
+
+## recv_chunk_new()
+
+if (sys.version_info.major, sys.version_info.minor) >= (2, 7):
+ recv_chunk = recv_chunk_new
+else:
+ recv_chunk = recv_chunk_old
+