.htaccess可用於改善緩存,您也可以在PHP中設置標題。我使用.htaccess:如果圖像已加載一次,但沒有更改,它將從緩存中加載。這種行爲可以對其他類型的文件進行設置(見下文):
的.htaccess
# BEGIN Expire headers
<IfModule mod_expires.c>
ExpiresActive On
ExpiresDefault "access plus 1 seconds"
ExpiresByType image/x-icon "access plus 2 months"
ExpiresByType image/jpeg "access plus 2 months"
ExpiresByType image/png "access plus 2 months"
ExpiresByType image/gif "access plus 2 months"
ExpiresByType application/x-shockwave-flash "access plus 2 months"
ExpiresByType text/css A15552000
ExpiresByType text/javascript "access plus 2 months"
ExpiresByType application/x-javascript "access plus 2 months"
ExpiresByType text/html "access plus 600 seconds"
ExpiresByType application/xhtml+xml "access plus 600 seconds"
</IfModule>
# END Expire headers
# BEGIN Cache-Control Headers
<IfModule mod_headers.c>
<FilesMatch "\\.(ico|jpe?g|png|gif|swf)$">
Header set Cache-Control "max-age=15552000, public"
</FilesMatch>
<FilesMatch "\\.(css)$">
Header set Cache-Control "max-age=2678400, public"
</FilesMatch>
<FilesMatch "\\.(js)$">
Header set Cache-Control "max-age=2678400, private"
</FilesMatch>
<FilesMatch "\\.(x?html?|php)$">
Header set Cache-Control "max-age=600, private, must-revalidate"
</FilesMatch>
是的,你可以只用`(新畫面())SRC = 「http://www.example.com/myimage.jpg」 和`它會預載您的圖像。 – 2011-02-12 23:38:17
@Adam這不是我想要做的。如果你讀了另一個問題,你就會明白爲什麼我要加載到一個iframe中了。http://stackoverflow.com/questions/4926215/cancel-single-image-request-in-html5-browsers/4979270 – Amir 2011-02-13 00:20:09
緩存共享...這就是爲什麼CDN網絡(如谷歌和微軟)在一個地方託管像jQuery這樣的東西的原因:http://code.google.com/apis/libraries/devguide.html – Amir 2011-02-13 00:21:54