Procedure
With Linkchecker installed at Linux the following sites are tested:
Findings
The average speed of this broken link checker is 3 links per second.
The maximum number of links being tested is unlimited.
Slow websites are tolerated when they respond within 20 seconds.
Unknown status codes (888) are considered an error. LinkedIn isn't tested because it is blocked by the robots.txt directive of LinkedIn.
There were a few unhandeld exceptions while testing httpstat.us. Testing with Dead Link City learned that redirected links are correctly shown. Hence this requirement is marked as .
Although it is possible to start with a specific page, that page isn't used as base for crawling all links. Only the links at that page are tested. Hence the requirement "Allows you to take a subdirectory as base for the test" is marked as .
Results
- Testing with A Different End Of The Internet give these results:
- PASSED: Examines links to other resources (the src attribute) - Should
- PASSED: Examines structural links (the link tag) - Should
- PASSED: Respects robots.txt of the-linked-to-website - Could
- FAILED: Presents unchecked links due to the robots.txt directive at the-linked-to-website - Must
- Testing with httpstat.us give these results:
- PASSED: Detects link error 404 - Must
- PASSED: Detects all link errors in the 400 and 500 range - Should
- FAILED: Detects redirected links - Should
- Testing with Dead Link City give these results:
- PASSED: Examines links in stylesheets - Could
- Testing with Rusty Links give these results:
- PASSED: Examines internal links - Must
- PASSED: Examines relative links in combination with the base tag - Should
- FAILED: Examines inline (anchor) links - Could
- PASSED: Examines external links - Must
- PASSED: Examines standard hyperlinks (the a tag) - Must
- PASSED: Ignores structural links with the dns-prefetch attribute - Could
- PASSED: Examines links with other schemes (at least FTP://) - Could
- PASSED: Examines Unicode links - Should
- FAILED: Detects blacklisted links (at least blacklisted by Google Safe Browsing) - Could
- PASSED: Respects robots.txt - Should
- PASSED: Allows you to test websites with up to 500 links - Must
- PASSED: Allows you to test websites with up to 2000 links - Should
- PASSED: Allows you to test websites with up to 5000 links - Should
- PASSED: Allows you to test websites without a restriction on the number of links - Should
The tests done by hand give these results:
- PASSED: Allows you to take a subdirectory as base for the test - Should
- PASSED: Allows you to start the test with a single click (after entering the to be tested URL) - Could
- Not applicable: Allows you to use your mobile device - Could (only for online link checkers)
- FAILED: Allows you to use a graphical user interface - Could (only for offline link checkers)
- PASSED: Allows you to test an unlimited number of websites - Should
- PASSED: Allows you to retest a website unlimited - Must
- PASSED: Allows you to save the results (internal or by an CSV export) - Could
- PASSED: Presents the results in one overview - Should
- FAILED: Presents 200 Ok and broken links - Could
- PASSED: Presents the webpage where an issue is found - Should
- PASSED: Presents in detail (e.g. linenumber, source viewer) where an issue is found - Could
- PASSED: Presents in a clear way the results when there are no issues found - Could
- FAILED: Test at least 5 links per second - Could
- FAILED: Test at least 10 links per second - Could
- FAILED: Test at least 15 links per second - Could
- FAILED: Test at least 20 links per second - Could
- FAILED: Test at least 25 links per second - Could
Score
Based on the results above 73 points (out of 87) were earned. That gives a score of 84%. However unchecked links due to the robots.txt directive at the-linked-to-website are not presented. This requirement is a Must, hence this broken link checker is not advised.
The Dead Link City score is 71/75.
