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什么是抓取異常？網(wǎng)站抓取異常的原因

抓取異常是指在進(jìn)行網(wǎng)站爬取或數(shù)據(jù)抽取時(shí)，出現(xiàn)的各種不能正常處理的異常情況。常見(jiàn)的抓取異常包括但不限于：網(wǎng)站被封禁、網(wǎng)站不允許爬取、請(qǐng)求超時(shí)、頁(yè)面格式錯(cuò)誤、網(wǎng)絡(luò)故障等。網(wǎng)站抓取異常的原因主要有以下幾種： 1. 服務(wù)器響應(yīng)速度過(guò)慢或者網(wǎng)絡(luò)故障，導(dǎo)致請(qǐng)求超時(shí)或者失敗。 2. 服務(wù)器為了防止爬蟲(chóng)惡意掃描把IP封禁。 3. 爬蟲(chóng)的請(qǐng)求頻率過(guò)高，被網(wǎng)站發(fā)現(xiàn)并且拒絕響應(yīng)請(qǐng)求，導(dǎo)致爬蟲(chóng)無(wú)法正常工作。

Public @ 2023-04-23 23:50:12

如何解決Google網(wǎng)站管理員工具的抓取錯(cuò)誤

“抓取錯(cuò)誤”是 Google網(wǎng)站管理員工具(Webmaster Tools)中最受歡迎的工具之一。它可以幫助你檢查錯(cuò)誤的鏈接，不僅僅是URL鏈接，還包行DNS解析失敗、服務(wù)器鏈接、robots.txt 文件等問(wèn)題，幾乎所有網(wǎng)站都會(huì)出現(xiàn)抓取錯(cuò)誤。網(wǎng)站站長(zhǎng)工具將錯(cuò)誤分為兩類：網(wǎng)站錯(cuò)誤(site errors)和鏈接地址錯(cuò)誤(URL errors)。如果在一個(gè)網(wǎng)站上出現(xiàn)多個(gè)抓取錯(cuò)誤，那么你的網(wǎng)站信任度會(huì)

Public @ 2019-11-01 16:05:11

什么是抓取異常？網(wǎng)站抓取異常的原因

什么是抓取異常？指的是蜘蛛無(wú)法正常抓取頁(yè)面，網(wǎng)站出現(xiàn)抓取異常。網(wǎng)站抓取異常的原因：1、服務(wù)器異常服務(wù)器連接異常最大的可能是網(wǎng)站服務(wù)器過(guò)大，超負(fù)荷運(yùn)轉(zhuǎn)，通過(guò)檢查瀏覽器是否正常訪問(wèn)。服務(wù)器異常會(huì)導(dǎo)致蜘蛛無(wú)法連接網(wǎng)站服務(wù)器，導(dǎo)致出現(xiàn)抓取失敗。2、域名到期域名過(guò)期網(wǎng)站肯定不能訪問(wèn)，域名解析會(huì)失效，如果存在這類情況請(qǐng)與域名注冊(cè)商聯(lián)系。3、網(wǎng)絡(luò)運(yùn)營(yíng)商異常電信和聯(lián)通這兩種都是屬于網(wǎng)絡(luò)運(yùn)營(yíng)商，蜘蛛無(wú)法訪問(wèn)的網(wǎng)站。

Public @ 2014-01-23 16:03:52

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基本文件流程錯(cuò)誤 SQL 調(diào)試

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[ DB ] CONNECT:[ UseTime:0.022735s ] mysql:dbname=briline.net;host=106.14.77.182;port=3306;charset=utf8
[ SQL ] SHOW COLUMNS FROM `ob_config` [ RunTime:0.016385s ]
[ SQL ] SELECT * FROM `ob_config` [ RunTime:0.015394s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_config', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 25, 'extra' => NULL, ) ]
[ SQL ] SHOW COLUMNS FROM `ob_hook` [ RunTime:0.016221s ]
[ SQL ] SELECT `id`,`name`,`addon_list` FROM `ob_hook` [ RunTime:0.015157s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_hook', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 3, 'extra' => NULL, ) ]
[ SQL ] SHOW COLUMNS FROM `ob_article` [ RunTime:0.016453s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `ob_article` WHERE `category_id` = 12 AND `tags` = '威海抓取異常' AND `status` <> -1 LIMIT 1 [ RunTime:0.024481s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 8035, 'extra' => 'Using where', ) ]
[ SQL ] SELECT * FROM `ob_article` WHERE `category_id` = 12 AND `tags` = '威海抓取異常' AND `status` <> -1 ORDER BY create_time desc LIMIT 0,10 [ RunTime:0.022551s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 8035, 'extra' => 'Using where; Using filesort', ) ]
[ SQL ] select * from `ob_article_tongji` where category_id=12 and mark_type='cate' order by times desc limit 15 [ RunTime:0.015851s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article_tongji', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 608, 'extra' => 'Using where; Using filesort', ) ]
[ SQL ] select * from `ob_article_tongji` where category_id=12 and mark_type='tags' order by times desc limit 100 [ RunTime:0.015535s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article_tongji', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 608, 'extra' => 'Using where; Using filesort', ) ]
[ SQL ] select * from `ob_article_tongji` where category_id=12 and mark_type='tags' order by rand() limit 30 [ RunTime:0.015986s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article_tongji', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 608, 'extra' => 'Using where; Using temporary; Using filesort', ) ]

0.379484s

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什么是抓取異常？網(wǎng)站抓取異常的原因

如何解決Google網(wǎng)站管理員工具的抓取錯(cuò)誤

什么是抓取異常？網(wǎng)站抓取異常的原因

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Categories

Tags

什么是抓取異常？網(wǎng)站抓取異常的原因

如何解決Google網(wǎng)站管理員工具的抓取錯(cuò)誤

什么是抓取異常？網(wǎng)站抓取異常的原因

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什么是抓取異常？網(wǎng)站抓取異常的原因