Crawler Inspector

1. Shard Calculation

Query:

Response:

Calculated Shard: 5 (from laksa186)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa005.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 = 75 AND (src_root_hash, src_unparsed) IN ((getAhrefsRootHashFromUnparsed(getAhrefsUnparsedNoserviceFromURL(\'https://xie.infoq.cn/article/bf3c1215455491a1c741f34ac\')), getAhrefsUnparsedNoserviceFromURL(\'https://xie.infoq.cn/article/bf3c1215455491a1c741f34ac\'))) FORMAT JSONEachRow'

Filter	Status	Condition	Details
HTTP status	PASS	`download_http_code = 200`	HTTP 200
Age cutoff	PASS	`download_stamp > now() - 6 MONTH`	0.7 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://xie.infoq.cn/article/bf3c1215455491a1c741f34ac
Last Crawled	2026-05-12 18:43:13 (21 days ago)
First Indexed	2025-10-02 23:35:41 (8 months ago)
HTTP Status Code	200
Content
Meta Title	大型广告系统架构与设计_Java_加勒比海带_InfoQ写作社区
Meta Description	业务背景：在数字化平台发展过程中，随着用户规模持续扩大与行为数据的不断积累，流量与数据逐渐成为平台最具价值的资产之一。为了进一步提升用户生命周期价值、加强平台的运营能力，同时打造自主可控的商业化基础
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	null
Author	null
Publish Time	not set
Original Publish Time	2025-10-02 23:35:41 (8 months ago)
Republished	No
Word Count (Total)	1
Word Count (Content)	0
Links
External Links	0
Internal Links	0
Technical SEO
Meta Nofollow	No
Meta Noarchive	No
JS Rendered	No
Redirect Target	null
Performance
Download Time (ms)	1,625
TTFB (ms)	1,610
Download Size (bytes)	3,022
Location
Host ID	5 (laksa005)
Partition ID	75
Root Hash	3265164560527275005
Unparsed URL	cn,infoq!xie,/article/bf3c1215455491a1c741f34ac s443

🕷️ Crawler Inspector

URL Lookup

Direct Parameter Lookup

1. Shard Calculation

Query:

Response:

2. Crawled Status Check

Query:

Response:

3. Robots.txt Check

Query:

Response:

4. Spam/Ban Check

Query:

Response:

5. Seen Status Check

Page Info Filters

Page Details