{"id":223734,"date":"2024-01-23T06:36:15","date_gmt":"2024-01-23T06:36:15","guid":{"rendered":"https:\/\/namso-gen.co\/blog\/what-is-etag-value\/"},"modified":"2024-01-23T06:36:15","modified_gmt":"2024-01-23T06:36:15","slug":"what-is-etag-value","status":"publish","type":"post","link":"https:\/\/namso-gen.co\/blog\/what-is-etag-value\/","title":{"rendered":"What is etag value?"},"content":{"rendered":"

Etag value is an essential component of modern web development and is commonly used to handle caching and validation of web resources. The term “etag” stands for entity tag, and it is a unique identifier that web servers assign to a specific version of a resource, such as a web page, image, or stylesheet. This identifier helps web browsers and proxy servers determine whether the version of the resource stored in their cache is still valid or if they need to request a fresh copy from the server.<\/p>\n

When a browser requests a resource, the server responds with the resource itself and an “etag” header containing the unique etag value. The browser stores this header along with the resource in its cache. The next time the browser needs to fetch the same resource, it sends a request to the server, including the etag value in an “If-None-Match” header. If the server determines that the etag value is still the same, it responds with a “304 Not Modified” status code, indicating that the resource has not changed since the previous request. This allows the browser to use the version in its cache, preventing unnecessary data transfers and reducing network latency.<\/p>\n

So, in summary, the etag value is a unique identifier that helps web browsers and proxy servers determine whether a cached version of a resource is still valid or if they should request a fresh copy from the server.<\/strong><\/p>\n

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