ETag
| ETag |
The ETag header provides the entity tag for the entity contained in the message. An entity tag is basically a way of identifying a resource.
Entity tags and their relationship to resources are discussed in detail in Chapter 15.
Type
Entity header
Basic Syntax
ETag: entity-tag
Examples
ETag: "11e92a-457b-31345aa"
ETag: W/"11e92a-457b-3134b5aa"