Divide download module

pytchat/tool/asyncdl.py

@@ -0,0 +1,100 @@
+
+import aiohttp
+import asyncio
+import json
+from . import parser
+from . block import Block
+from . dlworker import DownloadWorker
+from .. paramgen import arcparam
+from .. import config 
+from urllib.parse import quote
+
+headers = config.headers
+REPLAY_URL = "https://www.youtube.com/live_chat_replay/" \
+             "get_live_chat_replay?continuation="
+
+def ready_blocks(video_id, duration, div, callback):
+    if div <= 0: raise ValueError
+
+    def _divide(start, end, count):
+        min_interval = 120
+        if (not isinstance(start,int) or 
+            not isinstance(end,int) or 
+            not isinstance(count,int)):
+            raise ValueError("start/end/count must be int")
+        if start>end:
+            raise ValueError("end must be equal to or greater than start.")
+        if count<1:
+            raise ValueError("count must be equal to or greater than 1.")
+        if (end-start)/count < min_interval:
+            count = int((end-start)/min_interval) 
+            if count == 0 : count = 1
+        interval= (end-start)/count 
+        
+        if count == 1:
+            return [start]
+        return sorted(list(set([int(start+interval*j)
+            for j in range(count) ])))
+
+    async def _get_blocks( video_id, duration, div, callback):
+        async with aiohttp.ClientSession() as session:
+            futures = [_create_block(session, video_id, pos, seektime, callback)
+                for pos, seektime in enumerate(_divide(-1, duration, div))]
+            return await asyncio.gather(*futures,return_exceptions=True)
+
+    async def _create_block(session, video_id, pos, seektime, callback):
+        continuation = arcparam.getparam(
+            video_id, seektime = seektime)
+        
+        url = f"{REPLAY_URL}{quote(continuation)}&pbj=1"
+        async with session.get(url, headers = headers) as resp:
+            text = await resp.text()
+        next_continuation, actions = parser.parse(json.loads(text))
+        if actions:
+            first = parser.get_offset(actions[0])
+            last = parser.get_offset(actions[-1])
+            if callback:
+                callback(actions,last-first)
+            return Block(
+                pos = pos,
+                continuation = next_continuation,
+                chat_data = actions,
+                first = first,
+                last = last
+            )
+
+    loop = asyncio.get_event_loop()
+    result = loop.run_until_complete(
+        _get_blocks(video_id, duration, div, callback))
+    return result
+
+def download_chunk(callback, blocks):
+
+    async def _dl_distribute():
+        workers = [
+            DownloadWorker(
+                fetch = _fetch,
+                block = block
+            )
+            for block in blocks
+        ]
+        async with aiohttp.ClientSession() as session:
+            tasks = [worker.run(session) for worker in workers]
+            return await asyncio.gather(*tasks,return_exceptions=True)    
+
+    async def _fetch(continuation,session):
+        url = f"{REPLAY_URL}{quote(continuation)}&pbj=1"
+        async with session.get(url,headers = config.headers) as resp:
+            text = await resp.text()
+        continuation, actions = parser.parse(json.loads(text))
+        if actions:
+            last = parser.get_offset(actions[-1])
+            first = parser.get_offset(actions[0])
+            if callback:
+                callback(actions,last-first)
+            return actions,continuation,last
+        return continuation, [], None
+    
+    loop = asyncio.get_event_loop()
+    loop.run_until_complete(
+        _dl_distribute())

pytchat/tool/block.py

@@ -0,0 +1,9 @@
+class Block:
+    def __init__(self, pos=0, first=0, last=0,
+                continuation='', chat_data=[]):
+        self.pos = pos
+        self.first = first
+        self.last = last
+        self.temp_last = 0
+        self.continuation = continuation
+        self.chat_data = chat_data

pytchat/tool/dlworker.py

@@ -1,11 +1,10 @@
 from . import parser
 
 class DownloadWorker:
-    def __init__(self, dl, block, blocklist):
-        self.block  = block
-        self.blocklist = blocklist
-        self.dl = dl
-
+    def __init__(self, fetch, block):
+        self.block = block
+        self.fetch = fetch
+        
     async def run(self,session):
         temp_last = self.block.temp_last
         self.block.chat_data, continuation = self.cut(
@@ -14,7 +13,7 @@ class DownloadWorker:
             self.block.last,
             temp_last )
         while continuation:
-            data, cont, fetched_last = await self.dl(continuation, session)
+            data, cont, fetched_last = await self.fetch(continuation, session)
             data, continuation = self.cut(data, cont, fetched_last, temp_last)
             self.block.chat_data.extend(data)
         

pytchat/tool/downloader.py

@@ -3,92 +3,29 @@ import aiohttp
 import json
 import traceback
 from urllib.parse import quote
+from . import asyncdl
 from . import parser
 from . import videoinfo
-from . dlworker import DownloadWorker
+from . block import Block
 from . duplcheck import duplicate_head, duplicate_tail, overwrap
 from .. import config
-from .. import util
+from .. exceptions import InvalidVideoIdException
 from .. paramgen import arcparam
-from ..exceptions import InvalidVideoIdException
 
 logger = config.logger(__name__)
 headers=config.headers
 
-REPLAY_URL = "https://www.youtube.com/live_chat_replay/" \
-             "get_live_chat_replay?continuation="
-class Block:
-    def __init__(self, pos=0, first=0, last=0,
-                continuation='', chat_data=[]):
-        self.pos = pos
-        self.first = first
-        self.last = last
-        self.temp_last = 0
-        self.continuation = continuation
-        self.chat_data = chat_data
-
 class Downloader:
-    def __init__(self, video_id, duration, div, callback=None):
+    def __init__(self, video_id, duration, div, callback):
         self.video_id = video_id
         self.duration = duration
         self.div = div
         self.blocks = []
         self.callback = callback
 
-
     def ready_blocks(self):
-        if self.div <= 0: raise ValueError
-
-        def _divide(start, end, count):
-            min_interval = 120
-            if (not isinstance(start,int) or 
-                not isinstance(end,int) or 
-                not isinstance(count,int)):
-                raise ValueError("start/end/count must be int")
-            if start>end:
-                raise ValueError("end must be equal to or greater than start.")
-            if count<1:
-                raise ValueError("count must be equal to or greater than 1.")
-            if (end-start)/count < min_interval:
-                count = int((end-start)/min_interval) 
-                if count == 0 : count = 1
-            interval= (end-start)/count 
-            
-            if count == 1:
-                return [start]
-            return sorted(list(set([int(start+interval*j)
-                for j in range(count) ])))
-
-        async def _get_blocks(duration,div):
-            async with aiohttp.ClientSession() as session:
-                futures = [_create_block(session, pos, seektime)
-                    for pos, seektime in enumerate(_divide(-1, duration, div))]
-                return await asyncio.gather(*futures,return_exceptions=True)
-
-        async def _create_block(session, pos, seektime):
-            continuation = arcparam.getparam(
-                self.video_id, seektime = seektime)
-            
-            url = f"{REPLAY_URL}{quote(continuation)}&pbj=1"
-            async with session.get(url, headers = headers) as resp:
-                text = await resp.text()
-            next_continuation, actions = parser.parse(json.loads(text))
-            if actions:
-                first = parser.get_offset(actions[0])
-                last = parser.get_offset(actions[-1])
-                if self.callback:
-                    self.callback(actions,last-first)
-                return Block(
-                    pos = pos,
-                    continuation = next_continuation,
-                    chat_data = actions,
-                    first = first,
-                    last = last
-                )
-
-        loop = asyncio.get_event_loop()
-        result = loop.run_until_complete(
-            _get_blocks(self.duration, self.div))
+        result = asyncdl.ready_blocks(
+            self.video_id, self.duration, self.div, self.callback)
         self.blocks = [block for block in result if block]
         return self  
 
@@ -107,36 +44,9 @@ class Downloader:
         return self
 
     def download_blocks(self):
-        loop = asyncio.get_event_loop()
-        loop.run_until_complete(self._dl_distribute())
+        asyncdl.download_chunk(self.callback, self.blocks)
         return self
 
-    async def _dl_distribute(self):
-        workers = [
-            DownloadWorker(
-                dl=self.dl_func,
-                block = block,
-                blocklist= self.blocks
-            )
-            for pos,block in enumerate(self.blocks)
-        ]
-        async with aiohttp.ClientSession() as session:
-            tasks = [worker.run(session) for worker in workers]
-            return await asyncio.gather(*tasks,return_exceptions=True)    
-
-    async def dl_func(self,continuation,session):
-        url = f"{REPLAY_URL}{quote(continuation)}&pbj=1"
-        async with session.get(url,headers = config.headers) as resp:
-            text = await resp.text()
-        continuation, actions = parser.parse(json.loads(text))
-        if actions:
-            last = parser.get_offset(actions[-1])
-            first = parser.get_offset(actions[0])
-            if self.callback:
-                self.callback(actions,last-first)
-            return actions,continuation,last
-        return continuation, [], None
-    
     def remove_duplicate_tail(self):
         self.blocks = duplicate_tail(self.blocks)
         return self
@@ -157,7 +67,6 @@ class Downloader:
                 .remove_duplicate_tail()
                 .combine()
         )
-    
 
 def download(video_id, div = 20, callback=None, processor = None):
     duration = 0
@@ -168,4 +77,4 @@ def download(video_id, div = 20, callback=None, processor = None):
     if duration == 0:
         print("video is live.")
         return 
-    return Downloader(video_id, duration, div, callback).download()
+    return Downloader(video_id, duration, div, callback).download()