Crawler Inspector

1. Shard Calculation

Query:

Response:

Calculated Shard: 13 (from laksa171)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa013.int.ahrefs:8124/' \
  -H 'Content-Type: text/plain' \
  -H 'X-ClickHouse-Database: crawler3' \
  -H 'Authorization: Basic YXBpOg==' \
  -d 'SELECT getAhrefsURLFromUnparsed(src_unparsed) AS found_url, ifNull(toUnixTimestamp(download_stamp), 0) AS crawl_time, ifNull(toUnixTimestamp(props_url_first_seen), 0) AS first_indexed_time, download_http_code AS http_code, src_unparsed AS src_unparsed, src_root_hash AS src_root_hash, history_drop_reason AS history_drop_reason, meta_title AS meta_title, meta_descriptions AS meta_descriptions, attrs_boilerpipe_text AS attrs_boilerpipe_text, attrs_markdown AS attrs_markdown, attrs_readable_markdown AS attrs_readable_markdown, meta_canonical AS meta_canonical FROM crawler3.page_info_local FINAL PREWHERE (src_root_hash, src_unparsed) IN ((getAhrefsRootHashFromUnparsed(getAhrefsUnparsedNoserviceFromURL(\'https://www.cs.umd.edu/~shankar/417-F01/Slides/chapter2a-aus/sld019.htm\')), getAhrefsUnparsedNoserviceFromURL(\'https://www.cs.umd.edu/~shankar/417-F01/Slides/chapter2a-aus/sld019.htm\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/www.cs.umd.edu\/~shankar\/417-F01\/Slides\/chapter2a-aus\/sld019.htm","crawl_time":1760832208,"first_indexed_time":1754506176,"http_code":200,"src_unparsed":"edu,umd!cs,www,\/~shankar\/417-F01\/Slides\/chapter2a-aus\/sld019.htm s443","src_root_hash":"2127368015142676813","history_drop_reason":null,"meta_title":"http response status codes","meta_descriptions":[],"attrs_boilerpipe_text":"http response status codes Slide 19 of 40","attrs_markdown":"|   |\n|---|\n| [![First](https:\/\/www.cs.umd.edu\/~shankar\/417-F01\/Slides\/chapter2a-aus\/first.gif)](https:\/\/www.cs.umd.edu\/~shankar\/417-F01\/Slides\/chapter2a-aus\/sld001.htm) [![Previous](https:\/\/www.cs.umd.edu\/~shankar\/417-F01\/Slides\/chapter2a-aus\/prev.gif)](https:\/\/www.cs.umd.edu\/~shankar\/417-F01\/Slides\/chapter2a-aus\/sld018.htm) [![Next](https:\/\/www.cs.umd.edu\/~shankar\/417-F01\/Slides\/chapter2a-aus\/next.gif)](https:\/\/www.cs.umd.edu\/~shankar\/417-F01\/Slides\/chapter2a-aus\/sld020.htm) [![Last](https:\/\/www.cs.umd.edu\/~shankar\/417-F01\/Slides\/chapter2a-aus\/last.gif)](https:\/\/www.cs.umd.edu\/~shankar\/417-F01\/Slides\/chapter2a-aus\/sld040.htm) ![](https:\/\/www.cs.umd.edu\/~shankar\/417-F01\/Slides\/chapter2a-aus\/space.gif) [![Index](https:\/\/www.cs.umd.edu\/~shankar\/417-F01\/Slides\/chapter2a-aus\/info.gif)](https:\/\/www.cs.umd.edu\/~shankar\/417-F01\/Slides\/chapter2a-aus\/index.htm) [![Text](https:\/\/www.cs.umd.edu\/~shankar\/417-F01\/Slides\/chapter2a-aus\/text.gif)](https:\/\/www.cs.umd.edu\/~shankar\/417-F01\/Slides\/chapter2a-aus\/tsld019.htm) |\n| ![](https:\/\/www.cs.umd.edu\/~shankar\/417-F01\/Slides\/chapter2a-aus\/img019.gif) |\n\nSlide 19 of 40","attrs_readable_markdown":null,"meta_canonical":null}

Filter	Status	Condition	Details
HTTP status	PASS	`download_http_code = 200`	HTTP 200
Age cutoff	PASS	`download_stamp > now() - 6 MONTH`	5.9 months ago
History drop	PASS	`isNull(history_drop_reason)`	No drop reason
Spam/ban	PASS	`fh_dont_index != 1 AND ml_spam_score = 0`	ml_spam_score=0
Canonical	PASS	`meta_canonical IS NULL OR = '' OR = src_unparsed`	Not set

Property	Value
URL	https://www.cs.umd.edu/~shankar/417-F01/Slides/chapter2a-aus/sld019.htm
Last Crawled	2025-10-19 00:03:28 (5 months ago)
First Indexed	2025-08-06 18:49:36 (8 months ago)
HTTP Status Code	200
Meta Title	http response status codes
Meta Description	null
Meta Canonical	null
Boilerpipe Text	http response status codes Slide 19 of 40
Markdown	\| \| \|---\| \| [![First](https://www.cs.umd.edu/~shankar/417-F01/Slides/chapter2a-aus/first.gif)](https://www.cs.umd.edu/~shankar/417-F01/Slides/chapter2a-aus/sld001.htm) [![Previous](https://www.cs.umd.edu/~shankar/417-F01/Slides/chapter2a-aus/prev.gif)](https://www.cs.umd.edu/~shankar/417-F01/Slides/chapter2a-aus/sld018.htm) [![Next](https://www.cs.umd.edu/~shankar/417-F01/Slides/chapter2a-aus/next.gif)](https://www.cs.umd.edu/~shankar/417-F01/Slides/chapter2a-aus/sld020.htm) [![Last](https://www.cs.umd.edu/~shankar/417-F01/Slides/chapter2a-aus/last.gif)](https://www.cs.umd.edu/~shankar/417-F01/Slides/chapter2a-aus/sld040.htm) ![](https://www.cs.umd.edu/~shankar/417-F01/Slides/chapter2a-aus/space.gif) [![Index](https://www.cs.umd.edu/~shankar/417-F01/Slides/chapter2a-aus/info.gif)](https://www.cs.umd.edu/~shankar/417-F01/Slides/chapter2a-aus/index.htm) [![Text](https://www.cs.umd.edu/~shankar/417-F01/Slides/chapter2a-aus/text.gif)](https://www.cs.umd.edu/~shankar/417-F01/Slides/chapter2a-aus/tsld019.htm) \| \| ![](https://www.cs.umd.edu/~shankar/417-F01/Slides/chapter2a-aus/img019.gif) \| Slide 19 of 40
Readable Markdown	null
Shard	13 (laksa)
Root Hash	2127368015142676813
Unparsed URL	edu,umd!cs,www,/~shankar/417-F01/Slides/chapter2a-aus/sld019.htm s443

🕷️ Crawler Inspector

URL Lookup

Direct Parameter Lookup

1. Shard Calculation

Query:

Response:

2. Crawled Status Check

Query:

Response:

3. Robots.txt Check

Query:

Response:

4. Spam/Ban Check

Query:

Response:

5. Seen Status Check

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Page Details