🕷️ Crawler Inspector

URL Lookup

Direct Parameter Lookup

Raw Queries and Responses

1. Shard Calculation

Query:

Response:

Calculated Shard: 40 (from laksa183)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa040.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 = 57 AND (src_root_hash, src_unparsed) IN ((getAhrefsRootHashFromUnparsed(getAhrefsUnparsedNoserviceFromURL(\'https://www.w3schools.com/howto/howto_js_add_class.asp\')), getAhrefsUnparsedNoserviceFromURL(\'https://www.w3schools.com/howto/howto_js_add_class.asp\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/www.w3schools.com\/howto\/howto_js_add_class.asp","crawl_time":1776284325,"first_indexed_time":1505229407,"http_code":200,"src_unparsed":"com,w3schools!www,\/howto\/howto_js_add_class.asp s443","src_root_hash":"10756103332767711440","history_drop_reason":null,"meta_title":"How To Add a Class Name","meta_descriptions":["Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML and more."],"meta_canonical":null,"ml_categories_json":"{\"\/Computers_and_Electronics\":816,\"\/Computers_and_Electronics\/Programming\":714,\"\/Computers_and_Electronics\/Programming\/Scripting_Languages\":363,\"\/Internet_and_Telecom\":267,\"\/Internet_and_Telecom\/Web_Services\":260,\"\/Internet_and_Telecom\/Web_Services\/Web_Design_and_Development\":257,\"\/Jobs_and_Education\":169,\"\/Jobs_and_Education\/Education\":168,\"\/Jobs_and_Education\/Education\/Computer_Education\":139}","ml_types_json":"{\"\/Article\":963,\"\/Article\/How_to\":727}","ml_intent_types_json":"{\"Informational\":998}","meta_language":"en-us","attrs_author":null,"attrs_publish_time":0,"attrs_original_publish_time":1505229407,"attrs_is_republished":0,"attrs_nr_words":"2645","attrs_boilerpipe_nr_words":"192","body_ext_links_number":8,"body_int_links_number":673,"meta_nofollow":0,"meta_noarchive":0,"props_was_rendered":1,"src_redirect":"","download_time_msec":146,"download_ttfb_msec":132,"download_size":44955}

3. Robots.txt Check

Query:

Response:

4. Spam/Ban Check

Query:

Response:

5. Seen Status Check

ℹ️ Skipped - page is already crawled

📍

LOCATION

Host 40 · Partition 57

laksa040

10756103332767711440

📄

INDEXABLE

✅

CRAWLED

1 month 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`	1.6 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://www.w3schools.com/howto/howto_js_add_class.asp

Last Crawled

2026-04-15 20:18:45 (1 month ago)

First Indexed

2017-09-12 15:16:47 (8 years ago)

HTTP Status Code

200

Content

Meta Title

How To Add a Class Name

Meta Description

Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML and more.

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

/Computers_and_Electronics		81.6%
/Computers_and_Electronics/Programming		71.4%
/Computers_and_Electronics/Programming/Scripting_Languages		36.3%
/Internet_and_Telecom		26.7%
/Internet_and_Telecom/Web_Services		26.0%
/Internet_and_Telecom/Web_Services/Web_Design_and_Development		25.7%
/Jobs_and_Education		16.9%
/Jobs_and_Education/Education		16.8%
/Jobs_and_Education/Education/Computer_Education		13.9%

Raw JSON

{
    "/Computers_and_Electronics": 816,
    "/Computers_and_Electronics/Programming": 714,
    "/Computers_and_Electronics/Programming/Scripting_Languages": 363,
    "/Internet_and_Telecom": 267,
    "/Internet_and_Telecom/Web_Services": 260,
    "/Internet_and_Telecom/Web_Services/Web_Design_and_Development": 257,
    "/Jobs_and_Education": 169,
    "/Jobs_and_Education/Education": 168,
    "/Jobs_and_Education/Education/Computer_Education": 139
}

ML Page Types

/Article		96.3%
/Article/How_to		72.7%

Raw JSON

{
    "/Article": 963,
    "/Article/How_to": 727
}

ML Intent Types

Informational

99.8%

Raw JSON

{
    "Informational": 998
}

Content Metadata

Language

en-us

Author

null

Publish Time

not set

Original Publish Time

2017-09-12 15:16:47 (8 years ago)

Republished

Word Count (Total)

2,645

Word Count (Content)

192

Links

External Links

Internal Links

673

Technical SEO

Meta Nofollow

Meta Noarchive

JS Rendered

Yes

Redirect Target

null

Performance

Download Time (ms)

146

TTFB (ms)

132

Download Size (bytes)

44,955

Location

Host ID

40 (laksa040)

Partition ID

Root Hash

10756103332767711440

Unparsed URL

com,w3schools!www,/howto/howto_js_add_class.asp s443