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什么是ETag？ETag作用有哪些

ETag（Entity Tag）是HTTP協(xié)議中頭部字段之一，它是服務(wù)器用來標(biāo)識(shí)特定資源版本的字符串。 ETag的作用主要有以下幾個(gè)： 1. 緩存控制：通過比較客戶端請(qǐng)求中的If-Match或If-None-Match字段和服務(wù)器中資源的ETag值來判斷資源是否可以使用緩存，從而控制瀏覽器是否需要重新請(qǐng)求資源。 2. 實(shí)現(xiàn)樂觀鎖定：ETag可以用來實(shí)現(xiàn)樂觀鎖定，即在多用戶并發(fā)修改同一實(shí)體的情況下，可以通過比較各用戶提交的If-Match和If-None-Match的值來判斷是否可以進(jìn)行更新操作，從而避免數(shù)據(jù)沖突。 3. 資源變更檢測(cè)：當(dāng)資源發(fā)生變化時(shí)，服務(wù)器會(huì)更新ETag的值，客戶端可以通過比較新的ETag值和舊的ETag值來檢測(cè)資源是否發(fā)生變化，從而判斷是否需要重新加載資源。

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

什么是小程序自然搜索

小程序自然搜索是指通過搜索引擎對(duì)小程序進(jìn)行搜索，用戶無需安裝小程序，直接在搜索引擎內(nèi)即可訪問小程序。在小程序自然搜索結(jié)果中，搜索引擎會(huì)展示小程序名稱、圖標(biāo)、描述和排名等信息，用戶可以通過點(diǎn)擊訪問小程序頁面。小程序自然搜索可以提高小程序的曝光度，增加用戶訪問和使用量。

Public @ 2023-06-27 20:50:27

【官方說明】站點(diǎn)屬性（LOGO）審核原則

本平臺(tái)旨在提供一個(gè)健康、積極、向上的信息溝通平臺(tái)，擁有一條清晰的內(nèi)容審核政策，為用戶提供優(yōu)質(zhì)、專業(yè)、可靠的信息交流服務(wù)。在此過程中，我們認(rèn)真審核每個(gè)站點(diǎn)的屬性（LOGO），以確保它們不包含任何違反我們政策的內(nèi)容。以下是我們審核站點(diǎn)屬性時(shí)遵循的原則： 1. 沒有任何形式的歧視、仇恨和暴力的語言和表現(xiàn)。 2. 不包含色情和性暗示的內(nèi)容。 3. 不鼓勵(lì)或宣揚(yáng)危險(xiǎn)性行為，如販賣毒品、酒精飲品、人身傷害等

Public @ 2023-04-08 18:01:15

Google網(wǎng)站地圖Sitemap與搜索引擎優(yōu)化

Google網(wǎng)站地圖(sitemap)是Google提供給網(wǎng)站管理員的一個(gè)工具，來提高網(wǎng)站被收錄的網(wǎng)頁數(shù)目。一般來說，搜索引擎蜘蛛會(huì)跟著鏈接爬行到你網(wǎng)站的所有網(wǎng)頁。但很多時(shí)候，由于種種原因，并不是所有網(wǎng)頁都能被收錄進(jìn)搜索引擎數(shù)據(jù)庫。比如說，你的網(wǎng)站是數(shù)據(jù)庫動(dòng)態(tài)生成的，URL中帶有參數(shù)，一些網(wǎng)頁離主頁太遠(yuǎn)，你的網(wǎng)站PR值太低，新的網(wǎng)頁可能過很長時(shí)間才有機(jī)會(huì)被抓取等等。Google Sitemap就允

Public @ 2016-07-17 16:09:49

關(guān)于Sitemap

百度一直致力于將優(yōu)質(zhì)內(nèi)容索引并呈現(xiàn)給搜索用戶，因此百度站長平臺(tái)推出了Sitemap工具，網(wǎng)站可通過該工具將優(yōu)質(zhì)資源主動(dòng)反饋提交給百度站長平臺(tái)，加強(qiáng)百度對(duì)優(yōu)質(zhì)資源的收錄，優(yōu)化收錄效果。Sitemap（即站點(diǎn)地圖）就是您網(wǎng)站上各網(wǎng)頁的列表。創(chuàng)建并提交Sitemap有助于百度發(fā)現(xiàn)并了解您網(wǎng)站上的所有網(wǎng)頁，包括百度通過傳統(tǒng)抓取方式可能找不到的網(wǎng)頁。您還可以使用Sitemap提供有關(guān)您網(wǎng)站的其他信息，如上次

Public @ 2011-06-13 16:11:59

更多您感興趣的搜索

基本文件流程錯(cuò)誤 SQL 調(diào)試

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/www/wwwroot/briline.net/thinkphp/library/think/Request.php ( 50.94 KB )
/www/wwwroot/briline.net/app/config.php ( 11.25 KB )
/www/wwwroot/briline.net/app/database.php ( 1.41 KB )
/www/wwwroot/briline.net/thinkphp/library/think/Hook.php ( 4.76 KB )
/www/wwwroot/briline.net/app/tags.php ( 1.16 KB )
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/www/wwwroot/briline.net/thinkphp/library/think/db/builder/Mysql.php ( 2.16 KB )
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[ DB ] CONNECT:[ UseTime:0.026066s ] mysql:dbname=briline.net;host=106.14.77.182;port=3306;charset=utf8
[ SQL ] SHOW COLUMNS FROM `ob_article` [ RunTime:0.018606s ]
[ SQL ] SELECT * FROM `ob_article` WHERE `id` = 8620 LIMIT 1 [ RunTime:0.017610s ]
[ 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:0.017863s ]
[ 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:0.018073s ]
[ 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:0.018119s ]
[ 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:0.017420s ]
[ 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=8620 [ RunTime:0.018998s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `ob_article` WHERE `category_id` = 12 AND `cate` = '威海百度搜索資源平臺(tái)' AND `status` <> -1 LIMIT 1 [ RunTime:0.026905s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 9562, 'extra' => 'Using where', ) ]
[ SQL ] SELECT * FROM `ob_article` WHERE `category_id` = 12 AND `cate` = '威海百度搜索資源平臺(tái)' AND `status` <> -1 ORDER BY rand() LIMIT 0,2 [ RunTime:0.050034s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 9562, '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:0.026954s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 9562, '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:0.034667s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 9562, 'extra' => 'Using where; Using temporary; Using filesort', ) ]

0.482764s

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Categories

Tags

什么是ETag？ETag作用有哪些

什么是小程序自然搜索

【官方說明】站點(diǎn)屬性（LOGO）審核原則

Google網(wǎng)站地圖Sitemap與搜索引擎優(yōu)化

關(guān)于Sitemap

更多您感興趣的搜索

国产成人精品999视频&日本一区二区亚洲人妻精品&久久久精品国产99久久精&99热这里只有成人精品国产&精品国产剧情av一区二区&成人亚洲精品久久久久app&国产精品美女高潮抽搐A片

Categories

Tags

什么是ETag？ETag作用有哪些

什么是小程序自然搜索

【官方說明】站點(diǎn)屬性（LOGO）審核原則

Google網(wǎng)站地圖Sitemap與搜索引擎優(yōu)化

關(guān)于Sitemap

更多您感興趣的搜索

什么是ETag？ETag作用有哪些