🕷️ Crawler Inspector

URL Lookup

Direct Parameter Lookup

Raw Queries and Responses

1. Shard Calculation

Query:

Response:

Calculated Shard: 2 (from laksa150)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa002.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 = 71 AND (src_root_hash, src_unparsed) IN ((getAhrefsRootHashFromUnparsed(getAhrefsUnparsedNoserviceFromURL(\'https://nccid.ca/publications/understanding-rt-pcr-tests-and-results/\')), getAhrefsUnparsedNoserviceFromURL(\'https://nccid.ca/publications/understanding-rt-pcr-tests-and-results/\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/nccid.ca\/publications\/understanding-rt-pcr-tests-and-results\/","crawl_time":1779234185,"first_indexed_time":1613174749,"http_code":200,"src_unparsed":"ca,nccid!\/publications\/understanding-rt-pcr-tests-and-results\/ s443","src_root_hash":"1563581879600574202","history_drop_reason":null,"meta_title":"Understanding RT-PCR Tests and Results – National Collaborating Centre for Infectious Diseases","meta_descriptions":["This document provides a brief description of the Real Time Reverse Transcriptase Polymerase Chain Reaction (RT-PCR) test. It provides basic information on how this molecular biology test is used in laboratories to detect genetic material of a pathogen such as SARS-CO-2 virus, the cause of COVID-19 disease."],"meta_canonical":null,"ml_categories_json":"{\"\/Health\":874,\"\/Science\":417,\"\/Science\/Biological_Sciences\":416,\"\/Science\/Biological_Sciences\/Genetics\":401,\"\/Health\/Medical_Literature_and_Resources\":386,\"\/Health\/Medical_Literature_and_Resources\/Other\":366}","ml_types_json":"{\"\/Article\":898,\"\/Article\/Tutorial_or_Guide\":648}","ml_intent_types_json":"{\"Informational\":999}","meta_language":"en-ca","attrs_author":null,"attrs_publish_time":1613169828,"attrs_original_publish_time":1613169828,"attrs_is_republished":0,"attrs_nr_words":"1543","attrs_boilerpipe_nr_words":"1143","body_ext_links_number":9,"body_int_links_number":11,"meta_nofollow":0,"meta_noarchive":0,"props_was_rendered":1,"src_redirect":"","download_time_msec":118,"download_ttfb_msec":30,"download_size":190363}

3. Robots.txt Check

Query:

Response:

4. Spam/Ban Check

Query:

Response:

5. Seen Status Check

ℹ️ Skipped - page is already crawled

📍

LOCATION

Host 2 · Partition 71

laksa002

1563581879600574202

📄

INDEXABLE

✅

CRAWLED

14 days ago

🤖

ROBOTS ALLOWED

Page Info Filters

Filter	Status	Condition	Details
HTTP status	PASS	`download_http_code = 200`	HTTP 200
Age cutoff	PASS	`download_stamp > now() - 6 MONTH`	0.5 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

Page Details

Property

Value

URL

https://nccid.ca/publications/understanding-rt-pcr-tests-and-results/

Last Crawled

2026-05-19 23:43:05 (14 days ago)

First Indexed

2021-02-13 00:05:49 (5 years ago)

HTTP Status Code

200

Content

Meta Title

Understanding RT-PCR Tests and Results – National Collaborating Centre for Infectious Diseases

Meta Description

This document provides a brief description of the Real Time Reverse Transcriptase Polymerase Chain Reaction (RT-PCR) test. It provides basic information on how this molecular biology test is used in laboratories to detect genetic material of a pathogen such as SARS-CO-2 virus, the cause of COVID-19 disease.

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

/Health		87.4%
/Science		41.7%
/Science/Biological_Sciences		41.6%
/Science/Biological_Sciences/Genetics		40.1%
/Health/Medical_Literature_and_Resources		38.6%
/Health/Medical_Literature_and_Resources/Other		36.6%

Raw JSON

{
    "/Health": 874,
    "/Science": 417,
    "/Science/Biological_Sciences": 416,
    "/Science/Biological_Sciences/Genetics": 401,
    "/Health/Medical_Literature_and_Resources": 386,
    "/Health/Medical_Literature_and_Resources/Other": 366
}

ML Page Types

/Article		89.8%
/Article/Tutorial_or_Guide		64.8%

Raw JSON

{
    "/Article": 898,
    "/Article/Tutorial_or_Guide": 648
}

ML Intent Types

Informational

99.9%

Raw JSON

{
    "Informational": 999
}

Content Metadata

Language

en-ca

Author

null

Publish Time

2021-02-12 22:43:48 (5 years ago)

Original Publish Time

2021-02-12 22:43:48 (5 years ago)

Republished

Word Count (Total)

1,543

Word Count (Content)

1,143

Links

External Links

Internal Links

Technical SEO

Meta Nofollow

Meta Noarchive

JS Rendered

Yes

Redirect Target

null

Performance

Download Time (ms)

118

TTFB (ms)

Download Size (bytes)

190,363

Location

Host ID

2 (laksa002)

Partition ID

Root Hash

1563581879600574202

Unparsed URL

ca,nccid!/publications/understanding-rt-pcr-tests-and-results/ s443