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Robots META标签的写法

Robots META标签中没有大小写之分，name=”Robots”表示所有的搜索引擎，可以针对某个具体搜索引擎写为name=”BaiduSpider”。 content部分有四个指令选项：index、noindex、follow、nofollow，指令间以“,”分隔。

INDEX 指令告诉搜索机器人抓取该页面；

FOLLOW 指令表示搜索机器人可以沿着该页面上的链接继续抓取下去；

Robots Meta标签的缺省值是INDEX和FOLLOW，只有inktomi除外，对于它，缺省值是INDEX,NOFOLLOW。

这样，一共有四种组合：

<META NAME=”ROBOTS” CONTENT=”INDEX,FOLLOW”>

<META NAME=”ROBOTS” CONTENT=”NOINDEX,FOLLOW”>

<META NAME=”ROBOTS” CONTENT=”INDEX,NOFOLLOW”>

<META NAME=”ROBOTS” CONTENT=”NOINDEX,NOFOLLOW”>

其中

<META NAME=”ROBOTS” CONTENT=”INDEX,FOLLOW”>可以写成<META NAME=”ROBOTS” CONTENT=”ALL”>；

<META NAME=”ROBOTS” CONTENT=”NOINDEX,NOFOLLOW”>可以写成<META NAME=”ROBOTS” CONTENT=”NONE”>

绝大多数的搜索引擎机器人都遵守robots.txt的规则，而对于Robots META标签，目前支持的并不多，但是正在逐渐增加，如著名搜索引擎GOOGLE就完全支持，而且GOOGLE还增加了一个指令“archive”，可以限制GOOGLE是否保留网页快照。例如：

<META NAME=”googlebot” CONTENT=”index,follow,noarchive”>

表示抓取该站点中页面并沿着页面中链接抓取，但是不在GOOLGE上保留该页面的网页快照。

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

robots.txt文件放在哪里?

robots.txt文件应该放在网站根目录下。举例来说，当robots访问一个网站时，首先会检查该网站中是否存在这个文件，如果机器人找到这个文件，它就会根据这个文件的内容，来确定它访问权限的范围。

Public @ 2019-06-21 16:09:32

虚拟主机怎么设置404页面？

什么是404页面？当我们地址栏输入一个网址，由于服务器找不到这些页面，页面上会出现提示文字，这就是404页面。当页面不存在时。一定要返回404代码。有的站长认为既然页面不存在，将用户301转向到首页，这种设置方式对搜索引擎不友好的，会让搜索引擎认为网站上有大量与首页相同的页面。现在基本的虚拟主机都有提供设置404页面跳转功能，站长应该充分利用。虚拟主机怎么设置404页面？操作流程如下：1、在本地电

Public @ 2013-11-13 16:09:58

robots.txt语法教程

用几个最常见的情况，直接举例说明:1. 允许所有SE收录本站:robots.txt为空就可以，什么都不要写。2. 禁止所有SE收录网站的某些目录:User-agent: *Disallow: /目录名1/Disallow: /目录名2/Disallow: /目录名3/3. 禁止某个SE收录本站，例如禁止百度:User-agent: BaiduspiderDisallow: /4. 禁止所有SE收录

Public @ 2017-12-16 16:09:16

robots.txt使用教程

robots.txt 是一个文本文件，用于指示搜索引擎爬虫哪些页面可以被抓取，哪些页面不应该被抓取。在建立一个网站时，可以通过 robots.txt 控制搜索引擎爬虫对网站的访问，以达到更好的SEO效果。以下是robots.txt的使用教程。步骤1：新建 robots.txt 文件在网站的根目录下，新建一个名为 robots.txt 的文本文件。步骤2：编辑 robots.txt 文件

Public @ 2023-04-18 01:00:34

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[ DB ] CONNECT:[ UseTime:0.020653s ] mysql:dbname=briline.net;host=106.14.77.182;port=3306;charset=utf8
[ SQL ] SHOW COLUMNS FROM `ob_config` [ RunTime:0.014802s ]
[ SQL ] SELECT * FROM `ob_config` [ RunTime:0.013923s ]
[ 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:0.014669s ]
[ SQL ] SELECT `id`,`name`,`addon_list` FROM `ob_hook` [ RunTime:0.013829s ]
[ 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:0.014905s ]
[ SQL ] SELECT * FROM `ob_article` WHERE `id` = 4448 LIMIT 1 [ RunTime:0.013965s ]
[ 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:0.014232s ]
[ 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:0.014471s ]
[ 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:0.014488s ]
[ 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:0.013983s ]
[ 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+1 where id=4448 [ RunTime:0.014963s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `ob_article` WHERE `category_id` = 12 AND `cate` = '威海网站结构优化' AND `status` <> -1 LIMIT 1 [ RunTime:0.021390s ]
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[ SQL ] SELECT * FROM `ob_article` WHERE `category_id` = 12 AND `cate` = '威海网站结构优化' AND `status` <> -1 ORDER BY rand() LIMIT 0,2 [ RunTime:0.037176s ]
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[ SQL ] SELECT COUNT(*) AS tp_count FROM `ob_article` WHERE `category_id` = 12 AND `tags` = '威海Robots' AND `status` <> -1 LIMIT 1 [ RunTime:0.021281s ]
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[ SQL ] SELECT * FROM `ob_article` WHERE `category_id` = 12 AND `tags` = '威海Robots' AND `status` <> -1 ORDER BY rand() LIMIT 0,2 [ RunTime:0.030953s ]
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