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什么是ETag？ETag作用有哪些

ETag是HTTP頭的一部分，它是一個(gè)字符串標(biāo)識(shí)一個(gè)web資源的特定版本。它由web服務(wù)器生成，用于標(biāo)識(shí)文件的實(shí)體標(biāo)簽。ETag可以用來(lái)確定同一資源是否已被修改，這在緩存和驗(yàn)證客戶端緩存文件是否過(guò)期時(shí)很有用。ETag的作用如下： 1.緩存控制：在HTTP響應(yīng)頭部中包含ETag可以幫助瀏覽器緩存和驗(yàn)證資源。如果資源沒(méi)有發(fā)生任何改變，瀏覽器可以直接從本地緩存中獲取資源，而不需要重新從服務(wù)器獲取。 2.資源驗(yàn)證：如果瀏覽器的緩存過(guò)期或需要更新，它可以使用請(qǐng)求頭中的ETag來(lái)驗(yàn)證資源是否已被修改。如果資源沒(méi)有被修改，服務(wù)器可以發(fā)送一個(gè)響應(yīng)代碼為304的響應(yīng)，告訴瀏覽器它可以繼續(xù)使用緩存中的資源。 3.負(fù)載均衡：在使用多個(gè)Web服務(wù)器負(fù)載均衡時(shí)，ETag可以確?？蛻舳说恼?qǐng)求被重定向到與其之前請(qǐng)求相同的服務(wù)器。如果不使用ETag，則可能會(huì)發(fā)生客戶端請(qǐng)求一個(gè)資源，但它需要從新的服務(wù)器獲取，即使其他服務(wù)器已經(jīng)有緩存。

Public @ 2023-06-10 23:50:20

百度搜索資源平臺(tái)-鏈接提交自動(dòng)推送JS代碼升級(jí)支持HTTPS公告

親愛(ài)的網(wǎng)站管理員：為了給廣大用戶提供一個(gè)安全可靠的網(wǎng)絡(luò)環(huán)境，鏈接提交工具又進(jìn)行技術(shù)升級(jí)。此次技術(shù)升級(jí)之后，自動(dòng)推送功能全面支持HTTPS頁(yè)面，即新版本的鏈接提交自動(dòng)推送JS代碼將同時(shí)支持HTTP和HTTPS兩類頁(yè)面的提交。HTTP頁(yè)面的站點(diǎn)若無(wú)HTTPS升級(jí)計(jì)劃，可以保留原有代碼無(wú)需調(diào)整。自動(dòng)推送JS代碼是百度站長(zhǎng)平臺(tái)推出的輕量級(jí)鏈接提交組件，站長(zhǎng)只需將自動(dòng)推送JS代碼放置在站點(diǎn)每一個(gè)頁(yè)面源代碼中

Public @ 2019-10-26 16:06:34

百度發(fā)布移動(dòng)搜索建站優(yōu)化白皮書(shū)

2017年11月，百度發(fā)布《百度移動(dòng)搜索建站優(yōu)化白皮書(shū)》（后續(xù)簡(jiǎn)稱移動(dòng)建站白皮書(shū)），移動(dòng)建站白皮書(shū)目的在于讓廣大站長(zhǎng)充分了解百度搜索引擎規(guī)則，并根據(jù)規(guī)則合理安全建設(shè)網(wǎng)站、優(yōu)化網(wǎng)站，從而更好的獲取搜索流量，共建良性搜索生態(tài)。《百度移動(dòng)搜索建站優(yōu)化白皮書(shū)》詳情請(qǐng)點(diǎn)擊：http://ziyuan.baidu.com/college/courseinfo?id=1689&page=1來(lái)源：百度搜索

Public @ 2020-02-08 16:05:33

百度搜索資源平臺(tái)-sitemap全網(wǎng)開(kāi)放及建議啟用Etag的公告

尊敬的用戶：為了更好地優(yōu)化搜索資源平臺(tái)的索引和抓取效率，提高網(wǎng)站頁(yè)面的收錄速度，我們決定將百度搜索資源平臺(tái)的sitemap功能全網(wǎng)開(kāi)放。從即日起，所有網(wǎng)站都可以使用sitemap協(xié)議向百度搜索推送網(wǎng)站的頁(yè)面信息。同時(shí)，我們也建議網(wǎng)站在sitemap中啟用Etag機(jī)制。Etag是一種用于判斷網(wǎng)頁(yè)是否發(fā)生變化的機(jī)制，在網(wǎng)站頁(yè)面發(fā)生變動(dòng)時(shí)可以通過(guò)更新Etag來(lái)通知搜索引擎重新抓取該頁(yè)面，從而保持

Public @ 2023-07-26 21:00:31

XML格式中，“priority”提示會(huì)影響結(jié)果排名嗎？

不一定。在XML格式中，“priority”標(biāo)簽可以用于指定網(wǎng)頁(yè)的權(quán)重或重要性，但具體影響結(jié)果排名的因素還有很多其他因素，如關(guān)鍵詞匹配度、網(wǎng)頁(yè)內(nèi)容質(zhì)量、鏈接質(zhì)量等。因此，“priority”標(biāo)簽只是其中的一個(gè)因素，不一定會(huì)對(duì)結(jié)果排名產(chǎn)生直接影響。

Public @ 2023-06-10 09:50:07

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基本文件流程錯(cuò)誤 SQL 調(diào)試

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[ DB ] CONNECT:[ UseTime:0.024805s ] mysql:dbname=briline.net;host=106.14.77.182;port=3306;charset=utf8
[ SQL ] SHOW COLUMNS FROM `ob_config` [ RunTime:0.017704s ]
[ SQL ] SELECT * FROM `ob_config` [ RunTime:0.016740s ]
[ 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:0.017528s ]
[ SQL ] SELECT `id`,`name`,`addon_list` FROM `ob_hook` [ RunTime:0.016464s ]
[ 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:0.017709s ]
[ SQL ] SELECT * FROM `ob_article` WHERE `id` = 8735 LIMIT 1 [ RunTime:0.016762s ]
[ 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:0.016930s ]
[ 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:0.017151s ]
[ 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:0.017372s ]
[ 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` = 8735 LIMIT 1 [ RunTime:0.016458s ]
[ 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=8735 [ RunTime:0.020815s ]
[ 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:0.023998s ]
[ 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` = '威海百度搜索資源平臺(tái)' AND `status` <> -1 ORDER BY rand() LIMIT 0,2 [ RunTime:0.051089s ]
[ 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:0.023633s ]
[ 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:0.044095s ]
[ 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', ) ]

0.598199s

Categories

Tags

什么是ETag？ETag作用有哪些

百度搜索資源平臺(tái)-鏈接提交自動(dòng)推送JS代碼升級(jí)支持HTTPS公告

百度發(fā)布移動(dòng)搜索建站優(yōu)化白皮書(shū)

百度搜索資源平臺(tái)-sitemap全網(wǎng)開(kāi)放及建議啟用Etag的公告

XML格式中，“priority”提示會(huì)影響結(jié)果排名嗎？

更多您感興趣的搜索

Categories

Tags

什么是ETag？ETag作用有哪些

百度搜索資源平臺(tái)-鏈接提交自動(dòng)推送JS代碼升級(jí)支持HTTPS公告

百度發(fā)布移動(dòng)搜索建站優(yōu)化白皮書(shū)

百度搜索資源平臺(tái)-sitemap全網(wǎng)開(kāi)放及建議啟用Etag的公告

XML格式中，“priority”提示會(huì)影響結(jié)果排名嗎？

更多您感興趣的搜索

什么是ETag？ETag作用有哪些

XML格式中，“priority”提示會(huì)影響結(jié)果排名嗎？