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User-Agent

Summary

Contains information about the user agent originating the request.

Overview table

Direction
Request

Features
:

Syntax

User-Agent = product *( RWS ( product / comment ) )
product = token ["/" product-version]
product-version = token

Examples

User-Agent: CERN-LineMode/2.15 libwww/2.17b3

Chromium 38 on Linux, showing a proliferation of other user agents it is "also compatible with", a practice common among modern Web browsers

User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/38.0.2125.101 Safari/537.36

Related specifications

HTTP/1.1 Semantics and Content
: