使用BeautifulSoup爬取Challonge赛事对阵表时遭遇ConnectionError问题及网页爬取法律限制咨询

Hey there! Let's tackle your two key issues—getting past that connection error when scraping the Challonge bracket, and understanding whether your scraping is allowed under their terms.

That error happens because Challonge's servers are detecting your request as coming from an automated script (not a real web browser) and closing the connection early to block scrapers. Here's how to fix it:

Quick Fix: Add a User-Agent Header #

Websites use the User-Agent header to identify what kind of client is making the request. By mimicking a browser's User-Agent, you can make your request look more legitimate. Update your code like this:

import requests
from bs4 import BeautifulSoup as bs
import pandas as pd

# Add headers to mimic a browser request
headers = {
    'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36'
}

r = requests.get('https://smashchile.challonge.com/ss1', headers=headers)
webpage = bs(r.content)

Additional Tips: #

• If the error persists, try adding more headers (like Accept-Language) to match a real browser's request even closer.
• Use requests.Session() to persist cookies across requests, which might help build trust with the site's servers.
• Add small delays between requests if you're making multiple calls, to avoid triggering rate limits.

For reference, here's the error stack you encountered:

RemoteDisconnected
Traceback (most recent call last)
~/Desktop/Programming/JupNbEnv/lib/python3.7/site-packages/urllib3/connectionpool.py in urlopen(self, method, url, body, headers, retries, redirect, assert_same_host, timeout, pool_timeout, release_conn, chunked, body_pos, **response_kw)
 705 headers=headers,
--> 706 chunked=chunked,
 707 )
~/Desktop/Programming/JupNbEnv/lib/python3.7/site-packages/urllib3/connectionpool.py in _make_request(self, conn, method, url, timeout, chunked, **httplib_request_kw)
 444 # Otherwise it looks like a bug in the code.
--> 445 six.raise_from(e, None)
 446 except (SocketTimeout, BaseSSLError, SocketError) as e:
~/Desktop/Programming/JupNbEnv/lib/python3.7/site-packages/urllib3/packages/six.py in raise_from(value, from_value)
~/Desktop/Programming/JupNbEnv/lib/python3.7/site-packages/urllib3/connectionpool.py in _make_request(self, conn, method, url, timeout, chunked, **httplib_request_kw)
 439 try:
--> 440 httplib_response = conn.getresponse()
 441 except BaseException as e:
/usr/lib/python3.7/http/client.py in getresponse(self)
 1335 try:
-> 1336 response.begin()
 1337 except ConnectionError:
/usr/lib/python3.7/http/client.py in begin(self)
 305 while True:
--> 306 version, status, reason = self._read_status()
 307 if status != CONTINUE:
/usr/lib/python3.7/http/client.py in _read_status(self)
 274 # sending a valid response.
--> 275 raise RemoteDisconnected("Remote end closed connection without"
 276 " response")
RemoteDisconnected: 远程端未响应即关闭连接

在处理上述异常期间，又发生了另一个异常：
ProtocolError
Traceback (most recent call last)
~/Desktop/Programming/JupNbEnv/lib/python3.7/site-packages/requests/adapters.py in send(self, request, stream, timeout, verify, cert, proxies)
 448 retries=self.max_retries,
--> 449 timeout=timeout
 450 )
~/Desktop/Programming/JupNbEnv/lib/python3.7/site-packages/urllib3/connectionpool.py in urlopen(self, method, url, body, headers, retries, redirect, assert_same_host, timeout, pool_timeout, release_conn, chunked, body_pos, **response_kw)
 755 retries = retries.increment(
--> 756 method, url, error=e, _pool=self, _stacktrace=sys.exc_info()[2]
 757 )
~/Desktop/Programming/JupNbEnv/lib/python3.7/site-packages/urllib3/util/retry.py in increment(self, method, url, response, error, _pool, _stacktrace)
 530 if read is False or not self._is_method_retryable(method):
--> 531 raise six.reraise(type(error), error, _stacktrace)
 532 elif read is not None:
~/Desktop/Programming/JupNbEnv/lib/python3.7/site-packages/urllib3/packages/six.py in reraise(tp, value, tb)
 733 if value.__traceback__ is not tb:
--> 734 raise value.with_traceback(tb)
 735 raise value
~/Desktop/Programming/JupNbEnv/lib/python3.7/site-packages/urllib3/connectionpool.py in urlopen(self, method, url, body, headers, retries, redirect, assert_same_host, timeout, pool_timeout, release_conn, chunked, body_pos, **response_kw)
 705 headers=headers,
--> 706 chunked=chunked,
 707 )
~/Desktop/Programming/JupNbEnv/lib/python3.7/site-packages/urllib3/connectionpool.py in _make_request(self, conn, method, url, timeout, chunked, **httplib_request_kw)
 444 # Otherwise it looks like a bug in the code.
--> 445 six.raise_from(e, None)
 446 except (SocketTimeout, BaseSSLError, SocketError) as e:
~/Desktop/Programming/JupNbEnv/lib/python3.7/site-packages/urllib3/packages/six.py in raise_from(value, from_value)
~/Desktop/Programming/JupNbEnv/lib/python3.7/site-packages/urllib3/connectionpool.py in _make_request(self, conn, method, url, timeout, chunked, **httplib_request_kw)
 439 try:
--> 440 httplib_response = conn.getresponse()
 441 except BaseException as e:
/usr/lib/python3.7/http/client.py in getresponse(self)
 1335 try:
-> 1336 response.begin()
 1337 except ConnectionError:
/usr/lib/python3.7/http/client.py in begin(self)
 305 while True:
--> 306 version, status, reason = self._read_status()
 307 if status != CONTINUE:
/usr/lib/python3.7/http/client.py in _read_status(self)
 274 # sending a valid response.
--> 275 raise RemoteDisconnected("Remote end closed connection without"
 276 " response")
ProtocolError: ('连接已中止。', RemoteDisconnected('远程端未响应即关闭连接'))

在处理上述异常期间，又发生了另一个异常：
ConnectionError
Traceback (most recent call last)
<ipython-input-1-49ffef2d4435> in <module>
 3 import pandas as pd
 4
----> 5 r=requests.get('https://smashchile.challonge.com/ss1')
 6 webpage= bs(r.content)
~/Desktop/Programming/JupNbEnv/lib/python3.7/site-packages/requests/api.py in get(url, params, **kwargs)
 74
 75 kwargs.setdefault('allow_redirects', True)
---> 76 return request('get', url, params=params, **kwargs)
 77
 78
~/Desktop/Programming/JupNbEnv/lib/python3.7/site-packages/requests/api.py in request(method, url, **kwargs)
 59 # cases, and look like a memory leak in others.
 60 with sessions.Session() as session:
---> 61 return session.request(method=method, url=url, **kwargs)
 62
 63
~/Desktop/Programming/JupNbEnv/lib/python3.7/site-packages/requests/sessions.py in request(self, method, url, params, data, headers, cookies, files, auth, timeout, allow_redirects, proxies, hooks, stream, verify, cert, json)
 540 }
 541 send_kwargs.update(settings)
--> 542 resp = self.send(prep, **send_kwargs)
 543
 544 return resp
~/Desktop/Programming/JupNbEnv/lib/python3.7/site-packages/requests/sessions.py in send(self, request, **kwargs)
 653
 654 # Send the request
--> 655 r = adapter.send(request, **kwargs)
 656
 657 # Total elapsed time of the request (approximately)
~/Desktop/Programming/JupNbEnv/lib/python3.7/site-packages/requests/adapters.py in send(self, request, stream, timeout, verify, cert, proxies)
 496
 497 except (ProtocolError, socket.error) as err:
--> 498 raise ConnectionError(err, request=request)
 499
 500 except MaxRetryError as e:
ConnectionError: ('连接已中止。', RemoteDisconnected('远程端未响应即关闭连接'))

Let's break down the clause you shared:

未经我们的明确书面许可，不得使用任何机器人、蜘蛛、爬虫或其他自动化手段访问本网站或服务；但本规定不适用于搜索引擎的索引或更新操作。

What this means for your practice: #

• Your current scraping script violates their terms: The rule explicitly bans automated tools (like your BeautifulSoup script) unless you have explicit written permission from the site owners. Search engines are the only exception here.
• Better legal alternative: Use Challonge's official API: Challonge provides a documented API designed for programmatic access to tournament data. This is the reliable, compliant way to get bracket info—plus it avoids the hassle of scraping and potential blocks.

If you're just practicing scraping, consider using sites that explicitly allow non-commercial scraping (like public government data portals or sites with permissive robots.txt files) to stay on the right side of the rules.

内容的提问来源于stack exchange，提问作者Román