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Merge pull request #3049 from que-nguyen/dev

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Refactor URL validation function
This commit is contained in:
Timothy Jaeryang Baek 2024-06-12 01:36:34 -07:00 committed by GitHub
commit 5d3db15eca
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1 changed files with 7 additions and 23 deletions
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30
backend/apps/rag/main.py
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@ -8,6 +8,7 @@ from fastapi import (
Form,
)
from fastapi.middleware.cors import CORSMiddleware
import requests
import os, shutil, logging, re
from datetime import datetime
@ -716,36 +717,19 @@ def validate_url(url: Union[str, Sequence[str]]):
if isinstance(validators.url(url), validators.ValidationError):
raise ValueError(ERROR_MESSAGES.INVALID_URL)
if not ENABLE_RAG_LOCAL_WEB_FETCH:
# Local web fetch is disabled, filter out any URLs that resolve to private IP addresses
parsed_url = urllib.parse.urlparse(url)
# Get IPv4 and IPv6 addresses
ipv4_addresses, ipv6_addresses = resolve_hostname(parsed_url.hostname)
# Check if any of the resolved addresses are private
# This is technically still vulnerable to DNS rebinding attacks, as we don't control WebBaseLoader
for ip in ipv4_addresses:
if validators.ipv4(ip, private=True):
raise ValueError(ERROR_MESSAGES.INVALID_URL)
for ip in ipv6_addresses:
if validators.ipv6(ip, private=True):
# Check if the URL exists by making a HEAD request
try:
response = requests.head(url, allow_redirects=True)
if response.status_code != 200:
raise ValueError(ERROR_MESSAGES.INVALID_URL)
except requests.exceptions.RequestException:
raise ValueError(ERROR_MESSAGES.INVALID_URL)
return True
elif isinstance(url, Sequence):
return all(validate_url(u) for u in url)
else:
return False
def resolve_hostname(hostname):
# Get address information
addr_info = socket.getaddrinfo(hostname, None)
# Extract IP addresses from address information
ipv4_addresses = [info[4][0] for info in addr_info if info[0] == socket.AF_INET]
ipv6_addresses = [info[4][0] for info in addr_info if info[0] == socket.AF_INET6]
return ipv4_addresses, ipv6_addresses
def search_web(engine: str, query: str) -> list[SearchResult]:
"""Search the web using a search engine and return the results as a list of SearchResult objects.
Will look for a search engine API key in environment variables in the following order: