WEBVTT

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We have already seen on how we can add a Http expire header for different file formats.

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As far as nginx is concerned.

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So let's go back to the configuration file just to revise.

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So if we look over here, the any file which ends with Dot PNG, it is set to expire for one hour.

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So if we do a curl.

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I example.com.

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Logo dot PNG.

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You see it is actually expiring for 3600 seconds, which is one hour.

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So this is just a header fields So how can we be like 100% sure that browser is actually storing this

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particular file in its cache for maximum of one hour?

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So let's see on how we can be very sure that the browser is doing as instructed in the Http header fields.

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So this is a Mozilla firefox browser.

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So.

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Let's go to about cash.

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And this basically gives caching related information as far as browser is concerned.

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So if we see over here, the number of entries in the disk is 1696 and the number of entries in the

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memory is zero.

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So let's open a.

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Image file from the server.

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Example.com.

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Image one dot PNG.

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Now, before we open this, just make sure this is one six, nine, six.

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And if I see the image has been loaded and if I refresh the page, you see the number of entry has been

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increased by one.

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So if I go to list cache entries and if I search for image one dot PNG, this is the URL that we had

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opened.

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This is the size of that particular URL.

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And here it is also saying the time of response and when the response will be.

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Expired.

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So this is the time where the cash was stored, which is 75.

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And at eight five, this cash will be expired.

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So if we look into the.

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Header field.

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You can see the cache is expiring exactly after one hour.

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So now we can be 100% sure that the browser is actually storing this file into its cache memory for

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one hour.

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So this becomes very useful when debugging issues comes into picture.

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So this is short video.

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This is what I wanted to show to you.

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This is something which will be very useful in the production environment when you have caching related

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issues.

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So this is it.

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About this small module.

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I hope this has been informative for you, and I'd like to thank you for viewing.