I have some static images in a folder on my IIS 6-based website that I want to be downloaded as little as possible (to preserve bandwidth). I've set the Content Expiration to expire after 30 days. Is there anything else I can do in IIS to try to maximize the caching by browsers, proxy, and gateway caches?
Such as adding a Cache-Control header? Anything else?
http://www.galcho.com/Blog/post/2008/02/27/IIS7-How-to-set-cache-control-for-static-content.aspx
This is a blog post covering the following:
- Allow overriding static content setting
- set cache settings using following commands
- Cache it on client
Here's my answer from this question: "Expires" in http header for static content? how-to
@ECHO OFF
REM ---------------------------------------------------------------------------
REM Caching - sets the caching on static files in a web site
REM syntax
REM Caching.CMD 1 d:\sites\MySite\WWWRoot\*.CSS
REM
REM %1 is the WebSite ID
REM %2 is the path & Wildcard - for example, d:\sites\MySite\WWWRoot\*.CSS
REM _adsutil is the path to ADSUtil.VBS
REM ---------------------------------------------------------------------------
SETLOCAL
REM *******
REM SET THIS TO POINT TO adsutil.vbs - TYPICALLY c:\inetpub\adminscripts\adsutil.vbs
REM *******
SET _adsutil=D:\Apps\Scripts\adsutil.vbs
FOR %%i IN (%2) DO (
ECHO Setting Caching on %%~ni%%~xi
CSCRIPT %_adsutil% CREATE W3SVC/%1/root/%%~ni%%~xi "IIsWebFile"
CSCRIPT %_adsutil% SET W3SVC/%1/root/%%~ni%%~xi/HttpExpires "D, 0x69780"
ECHO.
)
Which sets the caching value for each CSS file in a web root to 5 days, then run it like this:
Caching.CMD 1 \site\wwwroot\*.css
Caching.CMD 1 \site\wwwroot\*.js
Caching.CMD 1 \site\wwwroot\*.html
Caching.CMD 1 \site\wwwroot\*.htm
Caching.CMD 1 \site\wwwroot\*.gif
Caching.CMD 1 \site\wwwroot\*.jpg
Kind of painful, but workable.
BTW - to get the value for HttpExpires, set the value in the GUI, then run
AdsUtil.vbs ENUM W3SVC/1/root/File.txt
to get the actual value you need
来源:https://stackoverflow.com/questions/287414/how-do-i-set-the-cachability-of-static-files-in-iis