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Robots META標簽的寫法

Robots META標簽中沒有大小寫之分，name=”Robots”表示所有的搜索引擎，可以針對某個具體搜索引擎寫為name=”BaiduSpider”。 content部分有四個指令選項：index、noindex、follow、nofollow，指令間以“,”分隔。

INDEX 指令告訴搜索機器人抓取該頁面；

FOLLOW 指令表示搜索機器人可以沿著該頁面上的鏈接繼續(xù)抓取下去；

Robots Meta標簽的缺省值是INDEX和FOLLOW，只有inktomi除外，對于它，缺省值是INDEX,NOFOLLOW。

這樣，一共有四種組合：

其中

<META NAME=”ROBOTS” CONTENT=”INDEX,FOLLOW”>可以寫成<META NAME=”ROBOTS” CONTENT=”ALL”>；

絕大多數(shù)的搜索引擎機器人都遵守robots.txt的規(guī)則，而對于Robots META標簽，目前支持的并不多，但是正在逐漸增加，如著名搜索引擎GOOGLE就完全支持，而且GOOGLE還增加了一個指令“archive”，可以限制GOOGLE是否保留網(wǎng)頁快照。例如：

表示抓取該站點中頁面并沿著頁面中鏈接抓取，但是不在GOOLGE上保留該頁面的網(wǎng)頁快照。

Public @ 2019-08-04 16:09:30

nofollow的定義及如何正確使用nofollow?

什么是nofollow：　　在html標簽中，< a > 標簽的rel 屬性被用于說明當前文檔與被鏈接文檔的關(guān)系。而nofollow則是其中的一種屬性值，其用法示例為：　　< a href="..." rel="nofollow" >...< /a >　　其另一種使用方法，也是最原始的使用方法，是用于網(wǎng)頁的元標簽中，告訴搜

Public @ 2019-06-24 16:08:52

GZIP是網(wǎng)站壓縮加速的一種技術(shù)，對于開啟后可以加快我們網(wǎng)站的打開速度，原理是經(jīng)過服務(wù)器壓縮，客戶端瀏覽器快速解壓的原理，可以大大減少了網(wǎng)站的流量。什么是GZIP答：GZIP最早由Jean-loup Gailly和Mark Adler創(chuàng)建，用于UNIX系統(tǒng)的文件壓縮。我們在Linux中經(jīng)常會用到后綴為.gz的文件，它們就是GZIP格式的?，F(xiàn)今已經(jīng)成為Internet 上使用非常普遍的一種數(shù)據(jù)壓縮格

Public @ 2012-04-28 16:09:42

robots.txt文件的格式

robots.txt文件的格式為： User-agent: [user-agent-name] Disallow: [URL path] 其中，[user-agent-name]指代搜索引擎爬蟲的名稱，[URL path]指代禁止訪問的URL路徑。在文件中可以定義多條User-agent和Disallow規(guī)則，每一條規(guī)則占一行，每一對規(guī)則之間要有一個空行。示例： User-agent: *

Public @ 2023-05-28 01:50:08

禁止搜索引擎收錄的方法

1. 什么是robots.txt文件?搜索引擎使用spider程序自動訪問互聯(lián)網(wǎng)上的網(wǎng)頁并獲取網(wǎng)頁信息。spider在訪問一個網(wǎng)站時，會首先會檢查該網(wǎng)站的根域下是否有一個叫做 robots.txt的純文本文件，這個文件用于指定spider在您網(wǎng)站上的抓取范圍。您可以在您的網(wǎng)站中創(chuàng)建一個robots.txt，在文件中聲明該網(wǎng)站中不想被搜索引擎收錄的部分或者指定搜索引擎只收錄特定的部分。請注意，僅當

Public @ 2015-10-28 16:08:55

更多您感興趣的搜索

基本文件流程錯誤 SQL 調(diào)試

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[ DB ] CONNECT:[ UseTime:0.023092s ] mysql:dbname=briline.net;host=106.14.77.182;port=3306;charset=utf8
[ SQL ] SHOW COLUMNS FROM `ob_article` [ RunTime:0.016447s ]
[ SQL ] SELECT * FROM `ob_article` WHERE `id` = 4448 LIMIT 1 [ RunTime:0.015468s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'const', 'possible_keys' => 'PRIMARY', 'key' => 'PRIMARY', 'key_len' => '4', 'ref' => 'const', 'rows' => 1, 'extra' => NULL, ) ]
[ SQL ] select * from `ob_article_tongji` where category_id=12 and mark_type='cate' order by times desc limit 15 [ RunTime:0.015625s ]
[ 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:0.016276s ]
[ 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:0.016309s ]
[ 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', ) ]
[ SQL ] SELECT * FROM `ob_article` WHERE `id` = 4448 LIMIT 1 [ RunTime:0.015336s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'const', 'possible_keys' => 'PRIMARY', 'key' => 'PRIMARY', 'key_len' => '4', 'ref' => 'const', 'rows' => 1, 'extra' => NULL, ) ]
[ SQL ] update `ob_article` set views=views+2 where id=4448 [ RunTime:0.018982s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `ob_article` WHERE `category_id` = 12 AND `cate` = '威海網(wǎng)站結(jié)構(gòu)優(yōu)化' AND `status` <> -1 LIMIT 1 [ RunTime:0.027604s ]
[ 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 `cate` = '威海網(wǎng)站結(jié)構(gòu)優(yōu)化' AND `status` <> -1 ORDER BY rand() LIMIT 0,2 [ RunTime:0.050575s ]
[ 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 temporary; Using filesort', ) ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `ob_article` WHERE `category_id` = 12 AND `tags` = '威海Robots' AND `status` <> -1 LIMIT 1 [ RunTime:0.026147s ]
[ 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Robots' AND `status` <> -1 ORDER BY rand() LIMIT 0,2 [ RunTime:0.046536s ]
[ 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 temporary; Using filesort', ) ]

0.471898s

Categories

Tags

Robots META標簽的寫法

nofollow的定義及如何正確使用nofollow?

什么是GZIP，開啟GZIP有什么好處

robots.txt文件的格式

禁止搜索引擎收錄的方法

更多您感興趣的搜索

Categories

Tags

Robots META標簽的寫法

nofollow的定義及如何正確使用nofollow?

什么是GZIP，開啟GZIP有什么好處

robots.txt文件的格式

禁止搜索引擎收錄的方法

更多您感興趣的搜索

什么是GZIP，開啟GZIP有什么好處