What is the difference between ETag and Last-Modified headers?
An example of an AI chatbot conversation about ETag and Last-Modified headers in HTTP.
What is the difference between ETag and Last-Modified headers?
ETag and Last-Modified are both HTTP headers used for caching and conditional requests. ETag is a unique identifier for a specific version of a resource, while Last-Modified indicates the last time the resource was changed.
How does the server generate an ETag?
The server generates an ETag by creating a hash of the resource's content or using a version number. This identifier changes whenever the resource is modified.
When should I use ETag over Last-Modified?
Use ETag when you need precise control over resource versions, especially for dynamic content. Last-Modified is simpler but less precise.
Can I use both headers together?
Yes, you can use both ETag and Last-Modified headers together. This can provide more flexibility in caching strategies.
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