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什么是ETag？ETag作用有哪些

ETag（Entity Tag）是HTTP协议中的一个头部字段，用于标识资源的某个版本。 ETag的作用主要有以下几点： 1. 缓存控制：当客户端请求一个资源时，服务器可以通过ETag来判断资源是否发生了变化。如果ETag与客户端提供的If-None-Match头字段一致，说明资源没有发生变化，服务器可以返回一个304 Not Modified状态码，告诉客户端可以使用本地缓存的副本，从而节省带宽和响应时间。 2. 并发控制：当多个客户端并发请求修改同一个资源时，服务器可以使用ETag来判断客户端提交的数据是否仍然是有效的，从而避免冲突和重复提交。 3. 断点续传：当客户端请求下载一个大文件时，服务器可以在响应中包含ETag，当客户端在下载过程中中断，再次请求时可以通过包含If-Match头字段以及之前获取到的ETag来恢复下载。总的来说，ETag可以帮助服务器和客户端更有效地处理缓存和并发请求，提升系统的性能和用户体验。

Public @ 2023-07-23 06:50:22

百度搜索资源平台-主动推送将全面替代实时推送

亲爱的网站管理员你好：sitemap的实时推送功能过段时间就要下线了，我们推出了更加强大的链接提交主动推送功能作为替代。新的主动推送功能更加强大：提交数据方式更简单，返回码达意更清晰（可立即知晓数据提交是否成功），可以做到实时向百度推送新数据。需要注意的是：1，主动推送功能的入口在：工具——网页抓取——链接提交——主动推送（实时）2，主动推送使用了与原实时推送不同的数据

Public @ 2021-08-03 16:07:00

站长福音：百度site语法划时代改版

百度——作为中国搜索引擎的鼻祖，其为广大站长烂熟于心的site语法，历经14年，终于于2014年5月完成了划时代改版，新上线的版本表现更直观，信息更准确，操作更便捷，最重要的是，不论是否是百度站长平台的用户，皆可以通过site语法查看某网站收录、安全及影响这两项指标的多种因素，及时知晓网站问题。十几年来，站长通过“site”语法查看百度搜索引擎收录了自己网站多少页面，这个数字关乎着所有站点的“幸福

Public @ 2019-04-25 16:07:37

百度Sitemap支持哪些格式

百度Sitemap协议支持文本格式和xml格式,可以根据自己情况来选择任意一种格式组织sitemap。具体格式说明及示例如下：1.第一种格式样例：txt文本格式在一个txt文本列明需要向百度提交的链接地址，将txt文本文件通过搜索资源平台进行提交http://www.example.com/repaste/101562698_5230191316.htmlhttp://www.example.co

Public @ 2009-12-25 16:09:44

Sitemap协议类型及包含范围

Sitemap协议是一种用于向搜索引擎提供网站结构信息的标准协议。其包含的内容包括网站中所有页面的URL、页面最后更新时间、页面更新频率等信息。目前，Sitemap协议一共有以下两种类型： 1. XML Sitemap：用于描述网站的全部网页，包括网页的URL、标识、访问频率、权重等信息。XML Sitemap可以包含多个XML文件，但每个XML文件的大小不能超过50MB。 2. HTML

Public @ 2023-04-18 11:50:23

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[ DB ] CONNECT:[ UseTime:0.020046s ] mysql:dbname=briline.net;host=106.14.77.182;port=3306;charset=utf8
[ SQL ] SHOW COLUMNS FROM `ob_config` [ RunTime:0.014228s ]
[ SQL ] SELECT * FROM `ob_config` [ RunTime:0.013280s ]
[ 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:0.014281s ]
[ SQL ] SELECT `id`,`name`,`addon_list` FROM `ob_hook` [ RunTime:0.013177s ]
[ 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:0.014410s ]
[ SQL ] SELECT * FROM `ob_article` WHERE `id` = 9799 LIMIT 1 [ RunTime:0.013368s ]
[ 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:0.013508s ]
[ 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:0.013894s ]
[ 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:0.014378s ]
[ 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` = 9799 LIMIT 1 [ RunTime:0.013254s ]
[ 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=9799 [ RunTime:0.016004s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `ob_article` WHERE `category_id` = 12 AND `cate` = '威海百度搜索资源平台' AND `status` <> -1 LIMIT 1 [ RunTime:0.020614s ]
[ 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` = '威海百度搜索资源平台' AND `status` <> -1 ORDER BY rand() LIMIT 0,2 [ RunTime:0.041817s ]
[ 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Sitemap' AND `status` <> -1 LIMIT 1 [ RunTime:0.020392s ]
[ 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Sitemap' AND `status` <> -1 ORDER BY rand() LIMIT 0,2 [ RunTime:0.030749s ]
[ 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', ) ]

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