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robots非标准扩展协议

Crawl-delay 指令:几大抓取工具支持Crawl-delay参数，设置为多少秒，以等待同服务器之间连续请求，如:

User-agent:

*Crawl-delay:10

来源：360站长平台

Public @ 2017-09-15 16:09:04

什么是错误链接？

根本不存在的链接，就是错误链接。错误链接与死链接的区别：错误链接是由于用户的疏忽，请求的链接不存在。死链接是原来访问正常，后来因为网站的变故而不能访问。发生错误链接的情况：用户对域名拼写错误。URL地址书写错误。URL后缀多余了或缺少了斜杆。URL地址中出现的字母大小写不完全匹配。来源：搜外网

Public @ 2018-05-24 16:21:34

网站SEO优化404页面怎么制作？

网站SEO优化并不是一两天就能成功的，需要长时间的积累和耐心。今天分享有关404页面的建立。用户访问网站上不存在的页面时，服务器通常应该返回404错误。如果站长没有在服务器端设置客制化的404页面，用户浏览器显示将会是一个默认错误的页面。示例：百度的404页面：http://www.baidu.com/search/error.html，很多运营比较好的网站，对于404页面的制作都会花心思，而不是

Public @ 2015-08-25 16:09:58

Robots.txt 文件应放在哪里？

Robots.txt文件应放在网站的根目录下。

Public @ 2023-06-23 19:50:03

禁止搜索引擎收录的方法

1. 什么是robots.txt文件?搜索引擎使用spider程序自动访问互联网上的网页并获取网页信息。spider在访问一个网站时，会首先会检查该网站的根域下是否有一个叫做 robots.txt的纯文本文件，这个文件用于指定spider在您网站上的抓取范围。您可以在您的网站中创建一个robots.txt，在文件中声明该网站中不想被搜索引擎收录的部分或者指定搜索引擎只收录特定的部分。请注意，仅当

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

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基本文件流程错误 SQL 调试

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[ DB ] CONNECT:[ UseTime:0.027729s ] mysql:dbname=briline.net;host=106.14.77.182;port=3306;charset=utf8
[ SQL ] SHOW COLUMNS FROM `ob_article` [ RunTime:0.019993s ]
[ SQL ] SELECT * FROM `ob_article` WHERE `id` = 4394 LIMIT 1 [ RunTime:0.018632s ]
[ 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:0.018922s ]
[ 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:0.019481s ]
[ 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:0.019202s ]
[ 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` = 4394 LIMIT 1 [ RunTime:0.018511s ]
[ 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=4394 [ RunTime:0.021997s ]
[ 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:0.025698s ]
[ 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` = '威海网站结构优化' AND `status` <> -1 ORDER BY rand() LIMIT 0,2 [ RunTime:0.042311s ]
[ 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:0.025542s ]
[ 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:0.046998s ]
[ 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', ) ]

0.502388s

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