100 lines
3.2 KiB
Python
100 lines
3.2 KiB
Python
import aiohttp
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import asyncio
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import os
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import os.path
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import random
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from bs4 import BeautifulSoup
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# References to paths we use to save any scraped content.
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DATA_COACH_LINKS = "data/coach_links.txt"
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DATA_COACH_DIR = "data/coach/{}/{}"
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async def scrape_coach_links(page_no):
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"""Scrape a single coach page listing."""
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links = []
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async with aiohttp.ClientSession() as session:
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href = f"https://www.chess.com/coaches?sortBy=alphabetical&page={page_no}"
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async with session.get(href) as response:
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if response.status != 200:
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print(f"Encountered {response.status} when retrieving {href}")
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return
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html = await response.text()
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soup = BeautifulSoup(html, "html.parser")
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members = soup.find_all("a", class_="members-categories-username")
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for member in members:
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links.append(member.get("href"))
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return links
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async def scrape_all_coach_links(max_pages=62):
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"""Scans through chess.com/coaches for all member links."""
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if os.path.isfile(DATA_COACH_LINKS):
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with open(DATA_COACH_LINKS, "r") as f:
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return f.readlines()
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for i in range(1, max_pages + 1):
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# Nest the file context manager here so I can `tail -f` the file.
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with open(DATA_COACH_LINKS, "a") as f:
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links = await scrape_coach_links(i)
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for link in links:
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f.write(f"{link}\n")
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await asyncio.sleep(random.randint(2, 5))
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return links
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async def download_member_info(member_name, filename, href):
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"""Download member-specific content.
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@return: True if we downloaded content. False if the results already
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existed locally.
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"""
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target = DATA_COACH_DIR.format(member_name, filename)
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if os.path.isfile(target):
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return False
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with open(target, "w") as f:
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async with aiohttp.ClientSession() as session:
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async with session.get(href) as response:
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if response.status != 200:
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print(f"Encountered {response.status} when retrieving {href}")
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return
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f.write(await response.text())
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return True
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async def main():
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links = await scrape_all_coach_links()
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for link in links:
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href = link.strip()
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member_name = href[len("https://www.chess.com/member/") :]
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downloaded = await asyncio.gather(
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download_member_info(
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member_name,
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f"{member_name}.html",
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href,
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),
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download_member_info(
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member_name,
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"activity.json",
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f"https://www.chess.com/callback/member/activity/{member_name}?page=1",
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),
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download_member_info(
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member_name,
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"stats.json",
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f"https://www.chess.com/callback/member/stats/{member_name}",
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),
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)
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# Only want to sleep if the files didn't already exist.
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if any(downloaded):
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await asyncio.sleep(random.randint(2, 5))
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print(f"Downloaded {member_name}")
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else:
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print(f"Skipping {member_name}")
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if __name__ == "__main__":
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os.makedirs("data/coach", exist_ok=True)
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asyncio.run(main())
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