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Add expires headers in iis is very Easy,but this cache all the static files. now i want only add expires headers to images,how can i do that? even i want cached specific file?
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When you set an expires header for a resource, such as all jpeg images, the browser will store those resources in its cache. The next time the visitor comes back to the page it will load faster, as the browser will already have those images available.
Why is it important? Adding Expires Headers is important to reduce HTTP requests which reduces the time it take for the server to communicate with the browser. It also allows your users to reuse the cache files that have been stored in the browser to reduce the amount of files they need to download.
To configure an Expires header in IIS, right-click the Default Web Site in the Computer Management Console, select Properties, then click the HTTP Headers tab, which Figure 4 shows. Select the Enable Content Expiration check box and choose your expiration preferences.
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