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[WEB-4452] fix: enhance URL detection logic in contains_url function (#7352)

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* fix: enhance URL detection logic in contains_url function

* fix: improve error handling in URL detection logic

* fix: enhance URL detection logic with length limits and edge case handling

* fix: adjust URL line length limit for improved detection accuracy
This commit is contained in:
Nikhil
2025-07-08 18:28:47 +05:30
committed by GitHub
parent a4ec80ceca
commit fd9da3164e
2 changed files with 301 additions and 2 deletions
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262
apps/api/plane/tests/unit/utils/test_url.py Normal file
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@@ -0,0 +1,262 @@
import pytest
from plane.utils.url import (
contains_url,
is_valid_url,
get_url_components,
normalize_url_path,
)
@pytest.mark.unit
class TestContainsURL:
"""Test the contains_url function"""
def test_contains_url_with_http_protocol(self):
"""Test contains_url with HTTP protocol URLs"""
assert contains_url("Check out http://example.com") is True
assert contains_url("Visit http://google.com/search") is True
assert contains_url("http://localhost:8000") is True
def test_contains_url_with_https_protocol(self):
"""Test contains_url with HTTPS protocol URLs"""
assert contains_url("Check out https://example.com") is True
assert contains_url("Visit https://google.com/search") is True
assert contains_url("https://secure.example.com") is True
def test_contains_url_with_www_prefix(self):
"""Test contains_url with www prefix"""
assert contains_url("Visit www.example.com") is True
assert contains_url("Check www.google.com") is True
assert contains_url("Go to www.test-site.org") is True
def test_contains_url_with_domain_patterns(self):
"""Test contains_url with domain patterns"""
assert contains_url("Visit example.com") is True
assert contains_url("Check google.org") is True
assert contains_url("Go to test-site.co.uk") is True
assert contains_url("Visit sub.domain.com") is True
def test_contains_url_with_ip_addresses(self):
"""Test contains_url with IP addresses"""
assert contains_url("Connect to 192.168.1.1") is True
assert contains_url("Visit 10.0.0.1") is True
assert contains_url("Check 127.0.0.1") is True
assert contains_url("Go to 8.8.8.8") is True
def test_contains_url_case_insensitive(self):
"""Test contains_url is case insensitive"""
assert contains_url("Check HTTP://EXAMPLE.COM") is True
assert contains_url("Visit WWW.GOOGLE.COM") is True
assert contains_url("Go to Https://Test.Com") is True
def test_contains_url_with_no_urls(self):
"""Test contains_url with text that doesn't contain URLs"""
assert contains_url("This is just plain text") is False
assert contains_url("No URLs here!") is False
assert contains_url("com org net") is False # Just TLD words
assert contains_url("192.168") is False # Incomplete IP
assert contains_url("") is False # Empty string
def test_contains_url_edge_cases(self):
"""Test contains_url with edge cases"""
assert contains_url("example.c") is False # TLD too short
assert contains_url("999.999.999.999") is False # Invalid IP (octets > 255)
assert contains_url("just-a-hyphen") is False # No domain
assert (
contains_url("www.") is False
) # Incomplete www - needs at least one char after dot
def test_contains_url_length_limit_under_1000(self):
"""Test contains_url with input under 1000 characters containing URLs"""
# Create a string under 1000 characters with a URL
text_with_url = "a" * 970 + " https://example.com" # 970 + 1 + 19 = 990 chars
assert len(text_with_url) < 1000
assert contains_url(text_with_url) is True
# Test with exactly 1000 characters
text_exact_1000 = "a" * 981 + "https://example.com" # 981 + 19 = 1000 chars
assert len(text_exact_1000) == 1000
assert contains_url(text_exact_1000) is True
def test_contains_url_length_limit_over_1000(self):
"""Test contains_url with input over 1000 characters returns False"""
# Create a string over 1000 characters with a URL
text_with_url = "a" * 982 + "https://example.com" # 982 + 19 = 1001 chars
assert len(text_with_url) > 1000
assert contains_url(text_with_url) is False
# Test with much longer input
long_text_with_url = "a" * 5000 + " https://example.com"
assert contains_url(long_text_with_url) is False
def test_contains_url_length_limit_exactly_1000(self):
"""Test contains_url with input exactly 1000 characters"""
# Test with exactly 1000 characters without URL
text_no_url = "a" * 1000
assert len(text_no_url) == 1000
assert contains_url(text_no_url) is False
# Test with exactly 1000 characters with URL at the end
text_with_url = "a" * 981 + "https://example.com" # 981 + 19 = 1000 chars
assert len(text_with_url) == 1000
assert contains_url(text_with_url) is True
def test_contains_url_line_length_scenarios(self):
"""Test contains_url with realistic line length scenarios"""
# Test with multiline input where total is under 1000 but we test line processing
# Short lines with URL
multiline_short = "Line 1\nLine 2 with https://example.com\nLine 3"
assert contains_url(multiline_short) is True
# Multiple lines under total limit
multiline_text = (
"a" * 200 + "\n" + "b" * 200 + "https://example.com\n" + "c" * 200
)
assert len(multiline_text) < 1000
assert contains_url(multiline_text) is True
def test_contains_url_total_length_vs_line_length(self):
"""Test the interaction between total length limit and line processing"""
# Test that total length limit takes precedence
# Even if individual lines would be processed, total > 1000 means immediate False
over_limit_text = "a" * 1001 # No URL, but over total limit
assert contains_url(over_limit_text) is False
# Test that under total limit, line processing works normally
under_limit_with_url = "a" * 900 + "https://example.com" # 919 chars total
assert len(under_limit_with_url) < 1000
assert contains_url(under_limit_with_url) is True
def test_contains_url_multiline_mixed_lengths(self):
"""Test contains_url with multiple lines of different lengths"""
# Test realistic multiline scenario under 1000 chars total
multiline_text = (
"Short line\n"
+ "a" * 400
+ "https://example.com\n" # Line with URL
+ "b" * 300 # Another line
)
assert len(multiline_text) < 1000
assert contains_url(multiline_text) is True
# Test multiline without URLs
multiline_no_url = "Short line\n" + "a" * 400 + "\n" + "b" * 300
assert len(multiline_no_url) < 1000
assert contains_url(multiline_no_url) is False
def test_contains_url_edge_cases_with_length_limits(self):
"""Test contains_url edge cases related to length limits"""
# Empty string
assert contains_url("") is False
# Very short string with URL
assert contains_url("http://a.co") is True
# String with newlines and mixed content
mixed_content = "Line 1\nLine 2 with https://example.com\nLine 3"
assert contains_url(mixed_content) is True
# String with many newlines under total limit
many_newlines = "\n" * 500 + "https://example.com"
assert len(many_newlines) < 1000
assert contains_url(many_newlines) is True
@pytest.mark.unit
class TestIsValidURL:
"""Test the is_valid_url function"""
def test_is_valid_url_with_valid_urls(self):
"""Test is_valid_url with valid URLs"""
assert is_valid_url("https://example.com") is True
assert is_valid_url("http://google.com") is True
assert is_valid_url("https://sub.domain.com/path") is True
assert is_valid_url("http://localhost:8000") is True
assert is_valid_url("https://example.com/path?query=1") is True
assert is_valid_url("ftp://files.example.com") is True
def test_is_valid_url_with_invalid_urls(self):
"""Test is_valid_url with invalid URLs"""
assert is_valid_url("not a url") is False
assert is_valid_url("example.com") is False # No scheme
assert is_valid_url("https://") is False # No netloc
assert is_valid_url("") is False # Empty string
assert is_valid_url("://example.com") is False # No scheme
assert is_valid_url("https:/example.com") is False # Malformed
def test_is_valid_url_with_non_string_input(self):
"""Test is_valid_url with non-string input"""
assert is_valid_url(None) is False
assert is_valid_url([]) is False
assert is_valid_url({}) is False
def test_is_valid_url_with_special_schemes(self):
"""Test is_valid_url with special URL schemes"""
assert is_valid_url("ftp://ftp.example.com") is True
assert is_valid_url("mailto:user@example.com") is False
assert is_valid_url("file:///path/to/file") is False
@pytest.mark.unit
class TestNormalizeURLPath:
"""Test the normalize_url_path function"""
def test_normalize_url_path_with_multiple_slashes(self):
"""Test normalize_url_path with multiple consecutive slashes"""
result = normalize_url_path("https://example.com//foo///bar//baz")
assert result == "https://example.com/foo/bar/baz"
def test_normalize_url_path_with_query_and_fragment(self):
"""Test normalize_url_path preserves query and fragment"""
result = normalize_url_path(
"https://example.com//foo///bar//baz?x=1&y=2#fragment"
)
assert result == "https://example.com/foo/bar/baz?x=1&y=2#fragment"
def test_normalize_url_path_with_no_redundant_slashes(self):
"""Test normalize_url_path with already normalized URL"""
url = "https://example.com/foo/bar/baz?x=1#fragment"
result = normalize_url_path(url)
assert result == url
def test_normalize_url_path_with_root_path(self):
"""Test normalize_url_path with root path"""
result = normalize_url_path("https://example.com//")
assert result == "https://example.com/"
def test_normalize_url_path_with_empty_path(self):
"""Test normalize_url_path with empty path"""
result = normalize_url_path("https://example.com")
assert result == "https://example.com"
def test_normalize_url_path_with_complex_path(self):
"""Test normalize_url_path with complex path structure"""
result = normalize_url_path(
"https://example.com///api//v1///users//123//profile"
)
assert result == "https://example.com/api/v1/users/123/profile"
def test_normalize_url_path_with_different_schemes(self):
"""Test normalize_url_path with different URL schemes"""
# HTTP
result = normalize_url_path("http://example.com//path")
assert result == "http://example.com/path"
# FTP
result = normalize_url_path("ftp://ftp.example.com//files//document.txt")
assert result == "ftp://ftp.example.com/files/document.txt"
def test_normalize_url_path_with_port(self):
"""Test normalize_url_path with port number"""
result = normalize_url_path("https://example.com:8080//api//v1")
assert result == "https://example.com:8080/api/v1"
def test_normalize_url_path_edge_cases(self):
"""Test normalize_url_path with edge cases"""
# Many consecutive slashes
result = normalize_url_path("https://example.com///////path")
assert result == "https://example.com/path"
# Mixed single and multiple slashes
result = normalize_url_path("https://example.com/a//b/c///d")
assert result == "https://example.com/a/b/c/d"

41
apps/api/plane/utils/url.py
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@@ -3,13 +3,50 @@ import re
from typing import Optional
from urllib.parse import urlparse, urlunparse
# Compiled regex pattern for better performance and ReDoS protection
# Using atomic groups and length limits to prevent excessive backtracking
URL_PATTERN = re.compile(
r"(?i)" # Case insensitive
r"(?:" # Non-capturing group for alternatives
r"https?://[^\s]+" # http:// or https:// followed by non-whitespace
r"|"
r"www\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*" # www.domain with proper length limits
r"|"
r"(?:[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?\.)+[a-zA-Z]{2,6}" # domain.tld with length limits
r"|"
r"(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)" # IP address with proper validation
r")"
)
def contains_url(value: str) -> bool:
"""
Check if the value contains a URL.
This function is protected against ReDoS attacks by:
1. Using a pre-compiled regex pattern
2. Limiting input length to prevent excessive processing
3. Using atomic groups and specific quantifiers to avoid backtracking
Args:
value (str): The input string to check for URLs
Returns:
bool: True if the string contains a URL, False otherwise
"""
url_pattern = re.compile(r"https?://|www\\.")
return bool(url_pattern.search(value))
# Prevent ReDoS by limiting input length
if len(value) > 1000: # Reasonable limit for URL detection
return False
# Additional safety: truncate very long lines that might contain URLs
lines = value.split("\n")
for line in lines:
if len(line) > 500: # Process only reasonable length lines
line = line[:500]
if URL_PATTERN.search(line):
return True
return False
def is_valid_url(url: str) -> bool: