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什么是ETag？ETag作用有哪些

ETag（Entity Tag）是HTTP协议中头部字段之一，它是服务器用来标识特定资源版本的字符串。 ETag的作用主要有以下几个： 1. 缓存控制：通过比较客户端请求中的If-Match或If-None-Match字段和服务器中资源的ETag值来判断资源是否可以使用缓存，从而控制浏览器是否需要重新请求资源。 2. 实现乐观锁定：ETag可以用来实现乐观锁定，即在多用户并发修改同一实体的情况下，可以通过比较各用户提交的If-Match和If-None-Match的值来判断是否可以进行更新操作，从而避免数据冲突。 3. 资源变更检测：当资源发生变化时，服务器会更新ETag的值，客户端可以通过比较新的ETag值和旧的ETag值来检测资源是否发生变化，从而判断是否需要重新加载资源。

Public @ 2023-06-08 14:00:12

百度搜索资源平台-添加站点时，提示无权限暂不可添加怎么办？

如果您在百度搜索资源平台添加站点时出现“无权限，暂不可添加”的提示，可能是由于以下原因： 1. 您的百度账号没有通过实名认证，无法使用这个功能。请先完成实名认证，并等待审核通过后再尝试添加站点。 2. 您的网站可能不符合百度搜索资源平台的规定。请确保您的网站内容健康、合法，并符合百度的规范。 3. 您的网站可能被百度搜索引擎认定为存在违规行为，如作弊、恶意营销等，这种情况下您没有权限在百度搜

Public @ 2023-06-15 11:00:11

站点整改反馈功能即将上线

很高兴听到您的站点即将上线整改反馈功能。这将有助于网站管理员更好地了解用户的需求和反馈，进一步改进和优化网站的功能和体验。同时，这也将使用户更加容易发现并报告站点存在的问题，从而使整个网站变得更加健康和安全。我们期待着看到您的反馈功能上线后的效果！

Public @ 2023-04-22 00:00:12

新手如何掌握制作和提交网站地图？

如果你是一个新手，以下是建议： 1. 了解什么是网站地图(Sitemap) 网站地图(Sitemap)是指一份关于网站上页面、内容和其他重要信息的清单。它可以帮助搜索引擎更好地了解并索引您的网站。 2. 确定您的网站地图的结构通过选择您的网站地图结构，您可以确定哪些页面是最重要的，并确定它们的层次结构。一旦你确定了这个结构，你可以依次列出所有这些页面。 3. 制作网站地图一旦你确定

Public @ 2023-04-20 17:50:29

网址在 Sitemap 中的位置是否会影响它的使用？

不会。网址在 Sitemap 中的位置并不会影响百度对它的识别或使用方式。

Public @ 2010-07-19 16:11:54

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基本文件流程错误 SQL 调试

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[ DB ] CONNECT:[ UseTime:0.022134s ] mysql:dbname=briline.net;host=106.14.77.182;port=3306;charset=utf8
[ SQL ] SHOW COLUMNS FROM `ob_config` [ RunTime:0.015901s ]
[ SQL ] SELECT * FROM `ob_config` [ RunTime:0.014952s ]
[ 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:0.015815s ]
[ SQL ] SELECT `id`,`name`,`addon_list` FROM `ob_hook` [ RunTime:0.014829s ]
[ 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:0.016046s ]
[ SQL ] SELECT * FROM `ob_article` WHERE `id` = 8620 LIMIT 1 [ RunTime:0.014928s ]
[ 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:0.015201s ]
[ 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:0.015382s ]
[ 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:0.015578s ]
[ 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` = 8620 LIMIT 1 [ RunTime:0.014836s ]
[ 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=8620 [ RunTime:0.019679s ]
[ 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:0.021866s ]
[ 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:0.048537s ]
[ 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:0.022382s ]
[ 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:0.031483s ]
[ 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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