215 lines
7.1 KiB
Python
215 lines
7.1 KiB
Python
# Python modules can't start with a number...
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import json
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import random
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import string
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from datetime import datetime
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from typing import Any, Dict
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import treq
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from bs4 import BeautifulSoup
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from siphashc import siphash
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import db
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import util
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from schemas.ch4_s import ATTRMAP
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class Chan4(object):
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"""
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4chan indexer, crawler and ingester.
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"""
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def __init__(self):
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name = self.__class__.__name__
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self.log = util.get_logger(name)
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self.api_endpoint = "https://a.4cdn.org"
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self.boards = ["out"]
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self.thread_list = {}
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#self.thread_deferreds = []
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#self.content_deferreds = []
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self.log.info(f"Starting crawler bot to {self.api_endpoint}")
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self.hash_key = db.r.get("hashing_key")
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if not self.hash_key:
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letters = string.ascii_lowercase
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self.hash_key = "".join(random.choice(letters) for i in range(16))
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self.log.debug(f"Created new hash key: {self.hash_key}")
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db.r.set("hashing_key", self.hash_key)
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else:
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self.hash_key = self.hash_key.decode("ascii")
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self.log.debug(f"Decoded hash key: {self.hash_key}")
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@inlineCallbacks
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def run(self):
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yield self.get_board_list()
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def got_thread_lists(self, thread_lists):
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print("GOT THREAD LIST", thread_lists)
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# Instead of while True, do it again!
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d = self.get_thread_lists()
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d.addCallback(self.got_thread_lists)
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# @inlineCallbacks
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# def mainloop(self):
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# while True:
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# yield self.get_thread_lists()
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# yield self.get_thread_contents()
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@inlineCallbacks
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def get_board_list(self):
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self.log.debug("Getting board list")
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response = self.api_call("boards.json")
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response.addCallback(self.got_board_list)
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yield response
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@inlineCallbacks
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def got_board_list(self, board_list):
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if board_list["success"]:
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for board in board_list["response"]["boards"]:
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self.boards.append(board["board"])
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self.log.debug(f"Got boards: {self.boards}")
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d = self.get_thread_lists()
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d.addCallback(self.got_thread_lists)
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yield d
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@inlineCallbacks
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def get_thread_lists(self):
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thread_deferreds = []
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for board in self.boards:
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d = self.get_thread_list(board)
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d.addCallback(self.got_thread_list, board)
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thread_deferreds.append(d)
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yield defer.gatherResults(thread_deferreds)
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def get_thread_list(self, board):
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self.log.debug(f"Getting thread list for {board}")
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response = self.api_call(f"{board}/catalog.json")
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return response
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def got_thread_list(self, thread_list, board):
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if not thread_list:
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self.log.error(f"Thread list invalid: {thread_list} {board}")
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return
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if thread_list["success"]:
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#self.thread_list[board] = thread_list["response"]
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for page in thread_list["response"]:
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for threads in page["threads"]:
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no = threads["no"]
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d = self.get_thread_content(board, no)
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d.addCallback(self.got_thread_content, board, no)
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self.log.info(f"Got thread list for {board}: {len(thread_list)}")
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def get_thread_content(self, board, thread):
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self.log.debug(f"Getting information for thread {thread} on board {board}")
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response = self.api_call(f"{board}/thread/{thread}.json")
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return response
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def got_thread_content(self, thread_content, board, thread):
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if not thread_content:
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self.log.error(f"Thread content invalid: {thread_content} {board} {thread}")
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return
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if thread_content["success"]:
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self.log.debug(f"Got thread content for thread {thread} on board {board}")
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for post in thread_content["response"]["posts"]:
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# print(post)
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self.handle_post(board, thread, post)
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else:
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self.log.error(
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(
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f"Error fetching thread {thread} on board {board}: "
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f"{thread_content['message']}"
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)
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)
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def handle_post(self, board, thread, post):
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post["type"] = "msg"
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# Calculate hash for post
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post_normalised = json.dumps(post, sort_keys=True)
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hash = siphash(self.hash_key, post_normalised)
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hash = str(hash)
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redis_key = f"cache.{board}.{thread}.{post['no']}"
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key_content = db.r.get(redis_key)
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if key_content:
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key_content = key_content.decode("ascii")
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if key_content == hash:
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return
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else:
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post["type"] = "update"
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db.r.set(redis_key, hash)
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# Check if hash exists
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# Store the hash
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for key, value in list(post.items()):
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if key in ATTRMAP:
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post[ATTRMAP[key]] = post[key]
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del post[key]
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if "ts" in post:
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old_time = post["ts"]
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# '08/30/22(Tue)02:25:37'
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time_spl = old_time.split(":")
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if len(time_spl) == 3:
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old_ts = datetime.strptime(old_time, "%m/%d/%y(%a)%H:%M:%S")
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else:
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old_ts = datetime.strptime(old_time, "%m/%d/%y(%a)%H:%M")
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new_ts = old_ts.isoformat()
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post["ts"] = new_ts
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if "msg" in post:
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soup = BeautifulSoup(post["msg"], "html.parser")
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msg = soup.get_text(separator="\n")
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post["msg"] = msg
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post["src"] = "4ch"
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# print({name_map[name]: val for name, val in post.items()})
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db.store_message(post)
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def dump(self, *args, **kwargs):
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self.log.error(f"Error: {args} {kwargs}")
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@inlineCallbacks
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def callback_api_call(self, response, result):
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result["status"] = response.code
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try:
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text = yield response.content()
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except: # noqa
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self.log.error("Error with API call")
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return False
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#print("RESP TEXT", text)
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try:
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result["response"] = json.loads(text)
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except json.decoder.JSONDecodeError:
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result["success"] = "ERROR"
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result["message"] = "Error parsing JSON."
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return result
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#print("RESP AFTER JSON", result)
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result["status"] = response.code
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if response.code == 200:
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result["success"] = True
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result["message"] = "OK"
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else:
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result["message"] = "API ERROR"
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return result
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def api_call(self, method: str):
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headers = {
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"User-Agent": (
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"Mozilla/5.0 (Windows NT 10.0; rv:68.0) Gecko/20100101 Firefox/68.0"
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)
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}
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url = f"{self.api_endpoint}/{method}"
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self.log.debug(f"GET {url}")
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response = treq.get(url, headers=headers)
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result: Dict[str, Any] = {
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"success": False,
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"message": "Call not successful",
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"response": None,
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"status": None,
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}
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response.addCallback(self.callback_api_call, result)
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response.addErrback(self.dump, url=url)
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return response
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