🕷️ Crawler Inspector

URL Lookup

Direct Parameter Lookup

Raw Queries and Responses

1. Shard Calculation

Query:

Response:

Calculated Shard: 97 (from laksa040)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa097.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 = 26 AND (src_root_hash, src_unparsed) IN ((getAhrefsRootHashFromUnparsed(getAhrefsUnparsedNoserviceFromURL(\'https://www.opit.com/magazine/computer-science-course/\')), getAhrefsUnparsedNoserviceFromURL(\'https://www.opit.com/magazine/computer-science-course/\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/www.opit.com\/magazine\/computer-science-course\/","crawl_time":1779173350,"first_indexed_time":1689457842,"http_code":200,"src_unparsed":"com,opit!www,\/magazine\/computer-science-course\/ s443","src_root_hash":"866177476802685297","history_drop_reason":null,"meta_title":"Computer Science Courses: Top Free & Paid Picks for Students - OPIT","meta_descriptions":["Explore the best computer science courses, course list, related courses, and top free online options for students seeking top-notch education in the field."],"meta_canonical":null,"ml_categories_json":"{\"\/Jobs_and_Education\":936,\"\/Jobs_and_Education\/Education\":936,\"\/Jobs_and_Education\/Education\/Computer_Education\":853,\"\/Computers_and_Electronics\":438,\"\/Computers_and_Electronics\/Programming\":260,\"\/Computers_and_Electronics\/Programming\/Development_Tools\":162}","ml_types_json":"{\"\/Article\":875,\"\/Article\/Roundup\":368}","ml_intent_types_json":"{\"Informational\":938,\"Commercial\":439}","meta_language":"en","attrs_author":null,"attrs_publish_time":1688233728,"attrs_original_publish_time":1688233728,"attrs_is_republished":0,"attrs_nr_words":"2106","attrs_boilerpipe_nr_words":"1684","body_ext_links_number":25,"body_int_links_number":28,"meta_nofollow":0,"meta_noarchive":0,"props_was_rendered":0,"src_redirect":"","download_time_msec":57,"download_ttfb_msec":56,"download_size":42090}

3. Robots.txt Check

Query:

Response:

4. Spam/Ban Check

Query:

Response:

5. Seen Status Check

ℹ️ Skipped - page is already crawled

📍

LOCATION

Host 97 · Partition 26

laksa097

866177476802685297

📄

INDEXABLE

✅

CRAWLED

15 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://www.opit.com/magazine/computer-science-course/

Last Crawled

2026-05-19 06:49:10 (15 days ago)

First Indexed

2023-07-15 21:50:42 (2 years ago)

HTTP Status Code

200

Content

Meta Title

Computer Science Courses: Top Free & Paid Picks for Students - OPIT

Meta Description

Explore the best computer science courses, course list, related courses, and top free online options for students seeking top-notch education in the field.

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

/Jobs_and_Education		93.6%
/Jobs_and_Education/Education		93.6%
/Jobs_and_Education/Education/Computer_Education		85.3%
/Computers_and_Electronics		43.8%
/Computers_and_Electronics/Programming		26.0%
/Computers_and_Electronics/Programming/Development_Tools		16.2%

Raw JSON

{
    "/Jobs_and_Education": 936,
    "/Jobs_and_Education/Education": 936,
    "/Jobs_and_Education/Education/Computer_Education": 853,
    "/Computers_and_Electronics": 438,
    "/Computers_and_Electronics/Programming": 260,
    "/Computers_and_Electronics/Programming/Development_Tools": 162
}

ML Page Types

/Article		87.5%
/Article/Roundup		36.8%

Raw JSON

{
    "/Article": 875,
    "/Article/Roundup": 368
}

ML Intent Types

Informational		93.8%
Commercial		43.9%

Raw JSON

{
    "Informational": 938,
    "Commercial": 439
}

Content Metadata

Language

Author

null

Publish Time

2023-07-01 17:48:48 (2 years ago)

Original Publish Time

2023-07-01 17:48:48 (2 years ago)

Republished

Word Count (Total)

2,106

Word Count (Content)

1,684

Links

External Links

Internal Links

Technical SEO

Meta Nofollow

Meta Noarchive

JS Rendered

Redirect Target

null

Performance

Download Time (ms)

TTFB (ms)

Download Size (bytes)

42,090

Location

Host ID

97 (laksa097)

Partition ID

Root Hash

866177476802685297

Unparsed URL

com,opit!www,/magazine/computer-science-course/ s443