Crawler Inspector

1. Shard Calculation

Query:

Response:

Calculated Shard: 7 (from laksa161)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa007.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://core.ac.uk/download/pdf/216741092.pdf\')), getAhrefsUnparsedNoserviceFromURL(\'https://core.ac.uk/download/pdf/216741092.pdf\'))) FORMAT JSONEachRow'

Filter	Status	Condition	Details
HTTP status	FAIL	`download_http_code = 200`	HTTP 404
Age cutoff	FAIL	`download_stamp > now() - 6 MONTH`	8.3 months ago
History drop	FAIL	`isNull(history_drop_reason)`	oldunavailable
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://core.ac.uk/download/pdf/216741092.pdf
Last Crawled	2025-08-07 20:08:10 (8 months ago)
First Indexed	not set
HTTP Status Code	404
Meta Title	null
Meta Description	null
Meta Canonical	null
Boilerpipe Text	null
Markdown	null
Readable Markdown	null
Shard	7 (laksa)
Root Hash	16721678438021681007
Unparsed URL	uk,ac,core!/download/pdf/216741092.pdf s443

🕷️ Crawler Inspector

URL Lookup

Direct Parameter Lookup

1. Shard Calculation

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Response:

2. Crawled Status Check

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Response:

3. Robots.txt Check

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Response:

4. Spam/Ban Check

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Response:

5. Seen Status Check

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