🕷️ Crawler Inspector

URL Lookup

Direct Parameter Lookup

Raw Queries and Responses

1. Shard Calculation

Query:

Response:

Calculated Shard: 129 (from laksa139)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa129.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 = 21 AND (src_root_hash, src_unparsed) IN ((getAhrefsRootHashFromUnparsed(getAhrefsUnparsedNoserviceFromURL(\'https://link.springer.com/book/10.1007/978-3-319-51103-0\')), getAhrefsUnparsedNoserviceFromURL(\'https://link.springer.com/book/10.1007/978-3-319-51103-0\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/link.springer.com\/book\/10.1007\/978-3-319-51103-0","crawl_time":1776583868,"first_indexed_time":1491875920,"http_code":200,"src_unparsed":"com,springer!link,\/book\/10.1007\/978-3-319-51103-0 s443","src_root_hash":"17645177711233004329","history_drop_reason":null,"meta_title":"Error-Correction Coding and Decoding: Bounds, Codes, Decoders, Analysis and Applications | Springer Nature Link","meta_descriptions":["This book discusses both the theory and practical applications of self-correcting data, commonly known as error-correcting codes. The applications included demonstrate the importance of these codes in a wide range of everyday technologies, from smartphones to secure communications and transactions. Written in a readily understandable style, the book presents the authors’ twenty-five years of research organized into five parts:Part I is concerned with the theoretical performance attainable by using error correcting codes to achieve communications efficiency in digital communications systems.Part II explores the construction of error-correcting codes and explains the different families of codes and how they are designed. Techniques are described for producing the very best codes.Part III addresses the analysis of low-density parity-check (LDPC) codes, primarily to calculate their stopping sets and low-weight codeword spectrum which determines the performance of these codes.Part IV deals with decoders designed to realize optimum performance.Part V describes applications which include combined error correction and detection, public key cryptography using Goppa codes, correcting errors in passwords and watermarking.This book is a valuable resource for anyone interested in error-correcting codes and their applications, ranging from non-experts to professionals at the forefront of research in their field.This book is open access under a CC BY 4.0 license."],"meta_canonical":null,"ml_categories_json":"{\"\/Computers_and_Electronics\":968,\"\/Computers_and_Electronics\/Computer_Security\":458,\"\/Computers_and_Electronics\/Computer_Security\/Network_Security\":340,\"\/Books_and_Literature\":193,\"\/Books_and_Literature\/E-Books\":103}","ml_types_json":"{\"\/Document\":821,\"\/Document\/Ebook\":720}","ml_intent_types_json":"{\"Informational\":974}","meta_language":"en","attrs_author":null,"attrs_publish_time":0,"attrs_original_publish_time":1491875920,"attrs_is_republished":0,"attrs_nr_words":"2012","attrs_boilerpipe_nr_words":"1091","body_ext_links_number":38,"body_int_links_number":206,"meta_nofollow":0,"meta_noarchive":0,"props_was_rendered":0,"src_redirect":"","download_time_msec":306,"download_ttfb_msec":262,"download_size":78049}

3. Robots.txt Check

Query:

Response:

4. Spam/Ban Check

Query:

Response:

5. Seen Status Check

ℹ️ Skipped - page is already crawled

📍

LOCATION

Host 129 · Partition 21

laksa129

17645177711233004329

📄

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`	1.5 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://link.springer.com/book/10.1007/978-3-319-51103-0

Last Crawled

2026-04-19 07:31:08 (1 month ago)

First Indexed

2017-04-11 01:58:40 (9 years ago)

HTTP Status Code

200

Content

Meta Title

Error-Correction Coding and Decoding: Bounds, Codes, Decoders, Analysis and Applications | Springer Nature Link

Meta Description

This book discusses both the theory and practical applications of self-correcting data, commonly known as error-correcting codes. The applications included demonstrate the importance of these codes in a wide range of everyday technologies, from smartphones to secure communications and transactions. Written in a readily understandable style, the book presents the authors’ twenty-five years of research organized into five parts:Part I is concerned with the theoretical performance attainable by using error correcting codes to achieve communications efficiency in digital communications systems.Part II explores the construction of error-correcting codes and explains the different families of codes and how they are designed. Techniques are described for producing the very best codes.Part III addresses the analysis of low-density parity-check (LDPC) codes, primarily to calculate their stopping sets and low-weight codeword spectrum which determines the performance of these codes.Part IV deals with decoders designed to realize optimum performance.Part V describes applications which include combined error correction and detection, public key cryptography using Goppa codes, correcting errors in passwords and watermarking.This book is a valuable resource for anyone interested in error-correcting codes and their applications, ranging from non-experts to professionals at the forefront of research in their field.This book is open access under a CC BY 4.0 license.

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		96.8%
/Computers_and_Electronics/Computer_Security		45.8%
/Computers_and_Electronics/Computer_Security/Network_Security		34.0%
/Books_and_Literature		19.3%
/Books_and_Literature/E-Books		10.3%

Raw JSON

{
    "/Computers_and_Electronics": 968,
    "/Computers_and_Electronics/Computer_Security": 458,
    "/Computers_and_Electronics/Computer_Security/Network_Security": 340,
    "/Books_and_Literature": 193,
    "/Books_and_Literature/E-Books": 103
}

ML Page Types

/Document		82.1%
/Document/Ebook		72.0%

Raw JSON

{
    "/Document": 821,
    "/Document/Ebook": 720
}

ML Intent Types

Informational

97.4%

Raw JSON

{
    "Informational": 974
}

Content Metadata

Language

Author

null

Publish Time

not set

Original Publish Time

2017-04-11 01:58:40 (9 years ago)

Republished

Word Count (Total)

2,012

Word Count (Content)

1,091

Links

External Links

Internal Links

206

Technical SEO

Meta Nofollow

Meta Noarchive

JS Rendered

Redirect Target

null

Performance

Download Time (ms)

306

TTFB (ms)

262

Download Size (bytes)

78,049

Location

Host ID

129 (laksa129)

Partition ID

Root Hash

17645177711233004329

Unparsed URL

com,springer!link,/book/10.1007/978-3-319-51103-0 s443