Crawler Inspector

1. Shard Calculation

Query:

Response:

Calculated Shard: 145 (from laksa044)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa145.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, meta_canonical AS meta_canonical, ml_categories_json AS ml_categories_json, ml_types_json AS ml_types_json, ml_intent_types_json AS ml_intent_types_json, meta_language AS meta_language, attrs_author AS attrs_author, ifNull(toUnixTimestamp(attrs_publish_time), 0) AS attrs_publish_time, ifNull(toUnixTimestamp(attrs_original_publish_time), 0) AS attrs_original_publish_time, ifNull(attrs_is_republished, 0) AS attrs_is_republished, ifNull(attrs_nr_words, 0) AS attrs_nr_words, ifNull(attrs_boilerpipe_nr_words, 0) AS attrs_boilerpipe_nr_words, ifNull(body_ext_links_number, 0) AS body_ext_links_number, ifNull(body_int_links_number, 0) AS body_int_links_number, ifNull(meta_nofollow, 0) AS meta_nofollow, ifNull(meta_noarchive, 0) AS meta_noarchive, ifNull(props_was_rendered, 0) AS props_was_rendered, ifNull(src_redirect, \'\') AS src_redirect, ifNull(download_time_msec, 0) AS download_time_msec, ifNull(download_ttfb_msec, 0) AS download_ttfb_msec, ifNull(download_size, 0) AS download_size FROM crawler3.page_info_local FINAL PREWHERE int_partition_id = 19 AND (src_root_hash, src_unparsed) IN ((getAhrefsRootHashFromUnparsed(getAhrefsUnparsedNoserviceFromURL(\'https://www.studyplan.dev/pro-cpp/queue\')), getAhrefsUnparsedNoserviceFromURL(\'https://www.studyplan.dev/pro-cpp/queue\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/www.studyplan.dev\/pro-cpp\/queue","crawl_time":1779884539,"first_indexed_time":1693133999,"http_code":200,"src_unparsed":"dev,studyplan!www,\/pro-cpp\/queue s443","src_root_hash":"16591698488056343945","history_drop_reason":null,"meta_title":"Introduction to Queues and std::queue in C++ | A Practical Guide","meta_descriptions":["UPDATED FOR C++23 | Learn the fundamentals of queues and their applications in C++ with the std::queue class template | Clear explanations and simple code examples"],"meta_canonical":null,"ml_categories_json":"","ml_types_json":"","ml_intent_types_json":"","meta_language":"en","attrs_author":"Ryan McCombe","attrs_publish_time":1712102400,"attrs_original_publish_time":1693133999,"attrs_is_republished":1,"attrs_nr_words":"3487","attrs_boilerpipe_nr_words":"2759","body_ext_links_number":0,"body_int_links_number":29,"meta_nofollow":0,"meta_noarchive":0,"props_was_rendered":0,"src_redirect":"","download_time_msec":424,"download_ttfb_msec":423,"download_size":50686}

Filter	Status	Condition	Details
HTTP status	PASS	`download_http_code = 200`	HTTP 200
Age cutoff	PASS	`download_stamp > now() - 6 MONTH`	0.2 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.studyplan.dev/pro-cpp/queue
Last Crawled	2026-05-27 12:22:19 (7 days ago)
First Indexed	2023-08-27 10:59:59 (2 years ago)
HTTP Status Code	200
Content
Meta Title	Introduction to Queues and std::queue in C++ \| A Practical Guide
Meta Description	UPDATED FOR C++23 \| Learn the fundamentals of queues and their applications in C++ with the std::queue class template \| Clear explanations and simple code examples
Meta Canonical	null
Boilerpipe Text	heavy column, fetched on demand
Markdown	heavy column, fetched on demand
Readable Markdown	heavy column, fetched on demand
ML Classification
ML Categories	null
ML Page Types	null
ML Intent Types	null
Content Metadata
Language	en
Author	Ryan McCombe
Publish Time	2024-04-03 00:00:00 (2 years ago)
Original Publish Time	2023-08-27 10:59:59 (2 years ago)
Republished	Yes
Word Count (Total)	3,487
Word Count (Content)	2,759
Links
External Links	0
Internal Links	29
Technical SEO
Meta Nofollow	No
Meta Noarchive	No
JS Rendered	No
Redirect Target	null
Performance
Download Time (ms)	424
TTFB (ms)	423
Download Size (bytes)	50,686
Location
Host ID	145 (laksa145)
Partition ID	19
Root Hash	16591698488056343945
Unparsed URL	dev,studyplan!www,/pro-cpp/queue s443

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