Mozilla PSL helper #19
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WalkthroughThe changes introduce a new implementation for managing the Mozilla Public Suffix List (PSL) using a Trie data structure in the Changes
Poem
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Actionable comments posted: 4
🧹 Outside diff range and nitpick comments (5)
tests/test_dns_mozpsl.py (2)
12-19: Enhance test coverage with additional edge casesWhile the current test cases cover various domain patterns, consider adding tests for:
- International Domain Names (IDN) with punycode
- Edge cases (empty string, None, malformed domains)
- Maximum length domain names
Example additional test cases:
# IDN test assert psl.coredomain("www.münchen.de.") == ("münchen.de", "") # Edge cases with pytest.raises(ValueError): psl.coredomain("") with pytest.raises(TypeError): psl.coredomain(None) with pytest.raises(ValueError): psl.coredomain("invalid..domain.") # Max length domain (255 chars) long_domain = "a" * 63 + "." + "b" * 63 + "." + "c" * 63 + "." + "d" * 61 + "." assert psl.coredomain(long_domain) is not None
8-8: Add documentation to improve test maintainabilityConsider adding:
- Docstring explaining the test's purpose and methodology
- Type hints for better code maintainability
- Comments explaining complex test cases
Example improvement:
def test_mozpsl() -> None: """Test Mozilla Public Suffix List functionality. Tests the following scenarios: 1. Basic domain extraction (www.ck) 2. Government domains (gov.ck) 3. Complex subdomains (microsoft.com) 4. AWS service domains 5. Error handling for invalid domains """pyproject.toml (1)
25-25: Consider more actively maintained alternativesFor handling internationalized domain names (IDNs), consider these alternatives:
idnapackage - More actively maintained and widely used- Python's built-in
encodings.idna- Part of the standard libraryThe choice depends on your specific needs:
- If you need pure punycode encoding/decoding, the current dependency is fine
- If you need full IDNA 2008 support, consider switching to
idna- If you only need basic IDNA support, the standard library might suffice
dnstapir/dns/mozpsl.py (2)
9-9: Correct the docstring format by removing the extra quotation markThe docstring has an extra double quote at the beginning, which may lead to formatting issues.
Apply this diff to fix the docstring:
-class TrieNode: - """ "Storage class for Trie""" +class TrieNode: + """Storage class for Trie"""
70-79: Include a timeout in the HTTP request to prevent hangingAdding a timeout to the
httpx.getrequest ensures that the application doesn't hang indefinitely if the request takes too long to respond.Apply this diff to add a timeout parameter:
def load_psl_url(self, url: str) -> None: """Load PSL from URL""" response = httpx.get( url, headers={ "Accept-Encoding": "gzip", }, + timeout=10.0, # Timeout in seconds ) response.raise_for_status() self.load_psl(io.StringIO(response.text))
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dnstapir/dns/mozpsl.py(1 hunks)pyproject.toml(1 hunks)tests/test_dns_mozpsl.py(1 hunks)
🔇 Additional comments (3)
dnstapir/dns/mozpsl.py (3)
108-108: Clarify the adjustment of labels for exclusions
The line labels -= 2 decreases the label count by 2 for exclusions. This adjustment could be unintuitive to future readers.
Consider adding a comment to explain why labels is decremented by 2 in the case of exclusions. This aids in maintainability and understanding of the code.
if line[0] == "!":
line = line[1:]
labels -= 2 # Exclusions have two fewer labels in the core domain2-2:
Ensure typing.Self is compatible with the project's Python version
The use of Self from the typing module is only available in Python 3.11 and above. If the project aims to support earlier versions of Python, consider replacing Self with a type variable or a forward reference.
Please confirm the minimum Python version supported by the project. If compatibility with earlier versions (pre-3.11) is required, you can adjust the code as follows:
-import io
-from typing import Self
...
-class TrieNode:
- # ...
- self.children: dict[str, Self] = {}
+import io
+from typing import TypeVar
+T = TypeVar('T', bound='TrieNode')
...
class TrieNode:
# ...
- self.children: dict[str, Self] = {}
+ self.children: dict[str, T] = {}Also applies to: 14-14
5-5:
Verify the availability and correct usage of the punycode library
The punycode module is not a standard Python library and may not be available. Instead, consider using the built-in idna encoding for handling Internationalized Domain Names (IDNs).
Please ensure that the punycode library is installed and correctly implements the required functionality. You might prefer to use the built-in idna codec as shown below:
-import punycode
+import idna
...
# Convert from Unicode
-lbls = punycode.convert(line).split(".")
+lbls = idna.encode(line).decode('ascii').split(".")Run the following script to check for the availability of the punycode package:
✅ Verification successful
The punycode library is correctly specified as a project dependency
The codebase correctly includes punycode version 0.2.1 as a direct dependency in pyproject.toml. While using the built-in idna codec is an alternative approach, the current implementation is valid and the dependency is properly managed through Poetry.
🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash
# Description: Verify if 'punycode' is available in the environment.
# Check if 'punycode' is installed
pip show punycode
# Search for 'punycode' in PyPI
pip search punycode
Length of output: 183
Script:
#!/bin/bash
# Let's check if punycode is used in the codebase and how it's implemented
rg -l "punycode" --type py
# Check the content of the file that imports punycode
rg "punycode" -A 5 -B 5 --type py
# Look for any requirements or setup files that might list dependencies
fd "requirements.txt|setup.py|pyproject.toml"
# If found, check their content
fd "requirements.txt|setup.py|pyproject.toml" -x cat {}
Length of output: 3254
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Much better than the original. Good job @jschlyter and coderabbit.
Code from @morkrost
Summary by CodeRabbit
New Features
Bug Fixes
Tests
PublicSuffixListclass, validating core functionality and error handling for various domain inputs.