Files
galaxy-integrations-python-api/src/galaxy/reader.py
Romuald Juchnowicz-Bierbasz 4e1ea8056d Add StreamLineReader with unit tests
2019-06-28 14:00:44 +02:00

29 lines
943 B
Python

from asyncio import StreamReader
class StreamLineReader:
"""Handles StreamReader readline without buffer limit"""
def __init__(self, reader: StreamReader):
self._reader = reader
self._buffer = bytes()
self._processed_buffer_it = 0
async def readline(self):
while True:
# check if there is no unprocessed data in the buffer
if not self._buffer or self._processed_buffer_it != 0:
chunk = await self._reader.read(1024)
if not chunk:
return bytes() # EOF
self._buffer += chunk
it = self._buffer.find(b"\n", self._processed_buffer_it)
if it < 0:
self._processed_buffer_it = len(self._buffer)
continue
line = self._buffer[:it]
self._buffer = self._buffer[it+1:]
self._processed_buffer_it = 0
return line