Learn about the many benefits of combining ETags and gzip compression in Nginx. Our Nginx Support team is here to help you with your questions and concerns.

Combining ETag & Gzip in Nginx

Did you know that combining ETags and gzip compression in NGINX helps optimize web performance?

ETags help out with efficient resource validation. In other words, when a client requests a resource, the server checks if the cached copy is still valid by comparing ETags. This reduces unnecessary data transfer when the cached resource is up to date.

Gzip Compression reduces the size of web resources before they are sent to clients. This leads to faster loading times. Furthermore, it reduces bandwidth consumption.

It is no surprise that enabling both ETags and gzip compression helps us strike a balance between resource validation and bandwidth optimization. In other words, clients receive up-to-date resources efficiently and quickly.

At the end of the day, this boosts the overall performance and responsiveness of our web server and website.

Here are some of the benefits of combining ETags and gzip:

• ETags makes sure that clients receive updated resources only when needed. This reduces the amount of data transferred and reduces server load.
• Additionally, Gzip compression reduces the size of resources. This leads to faster page loading times for our website visitors.
• Furthermore, smaller file sizes due to gzip compression reduce your website’s bandwidth consumption. This can be cost-effective.
• Combining these techniques boosts the user experience by providing fast and up-to-date content.

How to enable ETAG and Gzip with Nginx reverse proxy

Here is an example that uses the iris framework:

app.Get("/Cache/{key:string}", func(ctx iris.Context) {
key := ctx.Params().Get("key")
cached, err := readFrontCache(client, key)
eTag :=generateEtag(cached);
eTag = "W/\"" + eTag + "\""
none := ctx.GetHeader("If-None-Match")
if none == eTag {
ctx.WriteNotModified()
} else {
ctx.StatusCode(iris.StatusOK)
}
ctx.Header(context.ETagHeaderKey, eTag)
ctx.JSON(raw)
})


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Conclusion

In brief, our Support Experts demonstrated the many benefits of combining ETags and gzip compression in Nginx