244 lines
8.2 KiB
Python
244 lines
8.2 KiB
Python
import asyncio
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import aiohttp
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import json
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import traceback
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from urllib.parse import quote
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from . import parser
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from .. import config
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from .. import util
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from .. paramgen import arcparam
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logger = config.logger(__name__)
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headers=config.headers
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REPLAY_URL = "https://www.youtube.com/live_chat_replay/" \
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"get_live_chat_replay?continuation="
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class Block:
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def __init__(self, pos=0, first=0, last=0,
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continuation='', chat_data=[]):
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self.pos = pos
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self.first = first
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self.last = last
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self.temp_last = 0
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self.continuation = continuation
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self.chat_data = chat_data
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class Downloader:
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def __init__(self, video_id,duration,div):
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self.video_id = video_id
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self.duration = duration
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self.div = div
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self.blocks = []
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def ready_blocks(self):
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if self.div <= 0: raise ValueError
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def _divide(start, end, count):
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min_interval = 120
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if (not isinstance(start,int) or
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not isinstance(end,int) or
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not isinstance(count,int)):
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raise ValueError("start/end/count must be int")
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if start>end:
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raise ValueError("end must be equal to or greater than start.")
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if count<1:
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raise ValueError("count must be equal to or greater than 1.")
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if (end-start)/count < min_interval:
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count = int((end-start)/min_interval)
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if count == 0 : count = 1
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interval= (end-start)/count
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if count == 1:
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return [start]
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return sorted(list(set([int(start+interval*j)
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for j in range(count) ])))
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async def _get_blocks(duration,div):
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async with aiohttp.ClientSession() as session:
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futures = [_create_block(session, pos, seektime)
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for pos, seektime in enumerate(_divide(-1, duration , div))]
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return await asyncio.gather(*futures,return_exceptions=True)
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async def _create_block(session, pos, seektime):
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continuation = arcparam.getparam(self.video_id, seektime = seektime)
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url = f"{REPLAY_URL}{quote(continuation)}&pbj=1"
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async with session.get(url, headers = headers) as resp:
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text = await resp.text()
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next_continuation, actions = parser.parse(json.loads(text))
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return Block(
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pos = pos,
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continuation = next_continuation,
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chat_data = actions,
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first = parser.get_offset(actions[0]),
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last = parser.get_offset(actions[-1])
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)
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loop = asyncio.get_event_loop()
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self.blocks = loop.run_until_complete(_get_blocks(self.duration, self.div))
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return self
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def remove_duplicate_head(self):
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blocks = self.blocks
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def is_same_offset(index):
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return (blocks[index].first == blocks[index+1].first)
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def is_same_id(index):
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id_0 = parser.get_id(blocks[index].chat_data[0])
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id_1 = parser.get_id(blocks[index+1].chat_data[0])
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return (id_0 == id_1)
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def is_same_type(index):
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type_0 = parser.get_type(blocks[index].chat_data[0])
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type_1 = parser.get_type(blocks[index+1].chat_data[0])
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return (type_0 == type_1)
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ret = []
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[ret.append(blocks[i]) for i in range(len(blocks)-1)
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if (len(blocks[i].chat_data)>0 and
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not ( is_same_offset(i) and is_same_id(i) and is_same_type(i)))]
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ret.append(blocks[-1])
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self.blocks = ret
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return self
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def set_temporary_last(self):
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for i in range(len(self.blocks)-1):
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self.blocks[i].temp_last = self.blocks[i+1].first
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self.blocks[-1].temp_last = -1
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return self
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def remove_overwrap(self):
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blocks = self.blocks
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if len(blocks) == 1 : return self
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def is_overwrap(a, b):
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return (blocks[a].last > blocks[b].first)
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ret = []
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a = 0
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b = 1
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jmp = False
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ret.append(blocks[0])
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while a < len(blocks)-2:
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while is_overwrap(a,b):
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b+=1
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if b == len(blocks)-1:
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jmp=True
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break
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if jmp: break
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if b-a == 1:
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ret.append(blocks[b])
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a = b
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b+=1
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continue
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else:
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ret.append(blocks[b-1])
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a=b-1
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b=a+1
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ret.append(blocks[-1])
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self.blocks = ret
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return self
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def download_each_block(self):
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loop = asyncio.get_event_loop()
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loop.run_until_complete(self._dl_block())
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return self
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async def _dl_block(self):
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futures = []
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async with aiohttp.ClientSession() as session:
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futures = [self._dl_chunk(session, block) for block in self.blocks]
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return await asyncio.gather(*futures,return_exceptions=True)
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async def _dl_chunk(self, session, block:Block):
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if (block.temp_last != -1 and
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block.last > block.temp_last):
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return
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def get_last_offset(actions):
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return parser.get_offset(actions[-1])
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continuation = block.continuation
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while continuation:
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url = f"{REPLAY_URL}{quote(continuation)}&pbj=1"
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async with session.get(url,headers = config.headers) as resp:
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text = await resp.text()
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continuation, actions = parser.parse(json.loads(text))
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if actions:
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block.chat_data.extend(actions)
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last = get_last_offset(actions)
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if block.temp_last != -1:
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if last > block.temp_last:
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block.last = last
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break
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else:
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block.last = last
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def remove_duplicate_tail(self):
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blocks = self.blocks
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if len(blocks) == 1 : return self
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def is_same_offset(index):
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return (blocks[index-1].last == blocks[index].last)
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def is_same_id(index):
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id_0 = parser.get_id(blocks[index-1].chat_data[-1])
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id_1 = parser.get_id(blocks[index].chat_data[-1])
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return (id_0 == id_1)
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def is_same_type(index):
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type_0 = parser.get_type(blocks[index-1].chat_data[-1])
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type_1 = parser.get_type(blocks[index].chat_data[-1])
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return (type_0 == type_1)
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ret = []
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ret.append(blocks[0])
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[ret.append(blocks[i]) for i in range(1,len(blocks)-1)
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if not ( is_same_offset(i) and is_same_id(i) and is_same_type(i) )]
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ret.append(self.blocks[-1])
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self.blocks = ret
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return self
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def combine(self):
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line = ''
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try:
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if len(self.blocks[0].chat_data)>0:
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lastline=self.blocks[0].chat_data[-1]
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lastline_offset = parser.get_offset(lastline)
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else: return None
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for i in range(1,len(self.blocks)):
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f=self.blocks[i].chat_data
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if len(f)==0:
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logger.error(f'zero size piece.:{str(i)}')
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continue
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for row in range(len(f)):
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line = f[row]
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if parser.get_offset(line) > lastline_offset:
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self.blocks[0].chat_data.extend(f[row:])
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break
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else:
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logger.error(
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f'Missing connection.: pos:{str(i-1)}->{str(i)}'
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f' lastline_offset= {lastline_offset}')
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lastline_offset = parser.get_offset( f[-1])
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return self.blocks[0].chat_data
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except Exception as e:
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logger.error(f"{type(e)} {str(e)} {line}")
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traceback.print_exc()
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def download(self):
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return (
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self.ready_blocks()
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.remove_duplicate_head()
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.set_temporary_last()
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.remove_overwrap()
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.download_each_block()
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.remove_duplicate_tail()
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.combine()
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) |