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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-如何进行资质认证，审核周期为多长？

百度搜索资源平台的资质认证包括企业认证和个人认证。企业认证需要提供企业相关证照资料，个人认证需要提供个人身份证明等资料。提交认证申请后，百度会在7个工作日内进行审核。审核通过后，账号将获得相应的认证标识，并享受相应的权益和优惠。注意，提交材料必须真实有效，否则审核不通过。同时，提交的材料应当与站点内容相符合，否则认证也会受到影响。

Public @ 2023-04-21 11:00:11

【重点干货】搜索资源平台工具解读

搜索资源平台工具是一种以搜索引擎为基础的平台，旨在为用户提供高质量的搜索结果和专业的搜索资源。以下是对搜索资源平台工具的解读： 1. 搜索引擎基础：搜索资源平台工具的核心是搜索引擎技术，它能够根据用户的搜索关键词，从互联网上海量的信息库中提取相关的内容，并按照一定的算法进行排序和展示。 2. 高质量搜索结果：搜索资源平台工具通过不断优化搜索算法和提升搜索引擎的技术，为用户提供更加准确、全面的搜

Public @ 2023-07-25 17:50:28

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

站点地图分类

1、sitemap（sitemap.xml，sitemap.txt）这一类站点地图包含了该网站的所有连接，一般提交给爬虫去爬。让搜索引擎去收录网站内容。2、站点导航，主要是面向访问网站的用户。将网站连接分类，整理后展现在用户面前。

Public @ 2013-10-14 16:11:50

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基本文件流程错误 SQL 调试

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[ DB ] CONNECT:[ UseTime:0.024589s ] mysql:dbname=briline.net;host=106.14.77.182;port=3306;charset=utf8
[ SQL ] SHOW COLUMNS FROM `ob_article` [ RunTime:0.019466s ]
[ SQL ] SELECT * FROM `ob_article` WHERE `id` = 9799 LIMIT 1 [ RunTime:0.016519s ]
[ 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:0.016834s ]
[ 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:0.016891s ]
[ 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:0.017244s ]
[ 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:0.016471s ]
[ 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=9799 [ RunTime:0.021946s ]
[ 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:0.025685s ]
[ 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:0.046263s ]
[ 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:0.023142s ]
[ 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:0.033661s ]
[ 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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