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Url regex matching #16

Merged
merged 8 commits into from
Jun 16, 2024
Merged

Url regex matching #16

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613acba
Added `url_regex` argument to `Spider` class
Mews Jun 16, 2024
bbf027f
Added test case for regex matching
Mews Jun 16, 2024
88f484c
Fix merge conflicts
Mews Jun 16, 2024
d6cdbfe
Fix merge conflicts
Mews Jun 16, 2024
1632b99
Merge branch 'master' into url-regex-matching
Mews Jun 16, 2024
6c28726
Change verbose_print message
Mews Jun 16, 2024
640936d
Merge branch 'url-regex-matching' of https://github.com/Mews/tiny-web…
Mews Jun 16, 2024
56c0138
Fix import order
Mews Jun 16, 2024
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23 changes: 23 additions & 0 deletions tests/test_crawler.py
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Original file line number Diff line number Diff line change
Expand Up @@ -66,6 +66,29 @@ def test_save_results() -> None:
mocked_file.assert_called_once_with("out.json", "w", encoding='utf-8')


@responses.activate
def test_url_regex() -> None:
# Mock HTTP response
responses.add(
responses.GET,
"http://example.com",
body="<html><body><a href='http://example.com/123'>link</a><a href='http://example.com/test'>link</a></body></html>",
status=200,
content_type="text/html",
)

# This regex matches strings starting with "http://example.com/"
# And only have numeric characters after it
regex = r"http://example\.com/[0-9]+"

spider = Spider("http://example.com", 0, url_regex=regex)
spider.start()

assert spider.crawl_result["http://example.com"]["urls"] == ["http://example.com/123"]

assert "http://example.com/test" not in spider.crawl_result["http://example.com"]["urls"]


@patch.object(Spider, "crawl")
@patch.object(Spider, "save_results")
def test_start(mock_save_results: MagicMock, mock_crawl: MagicMock) -> None:
Expand Down
8 changes: 8 additions & 0 deletions tiny_web_crawler/crawler.py
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Expand Up @@ -8,6 +8,7 @@
import time
import requests
import validators
import re
from bs4 import BeautifulSoup
from colorama import Fore, Style, init

Expand All @@ -29,6 +30,7 @@ class Spider():
save_to_file (Optional[str]): The file path to save the crawl results.
max_workers (int): Max count of concurrent workers
delay (float): request delay
url_regex (Optional[str]): A regular expression against which urls will be matched before crawling
"""

root_url: str
Expand All @@ -41,6 +43,7 @@ class Spider():
crawl_set: Set[str] = field(default_factory=set)
link_count: int = 0
scheme: str = field(default=DEFAULT_SCHEME, init=False)
url_regex: Optional[str] = None

def fetch_url(self, url: str) -> Optional[BeautifulSoup]:
"""
Expand Down Expand Up @@ -152,6 +155,11 @@ def crawl(self, url: str) -> None:
if pretty_url in self.crawl_result[url]['urls']:
continue

if self.url_regex:
if not re.compile(self.url_regex).match(pretty_url):
self.verbose_print(Fore.RED + f"Url didn't match regex: {pretty_url}")
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continue

self.crawl_result[url]['urls'].append(pretty_url)
self.crawl_set.add(pretty_url)
self.verbose_print(Fore.BLUE + f"Link found: {pretty_url}")
Expand Down