HTTP Request Headers

by Jeff Hunter, Sr. Database Administrator

Introduction

The following table lists the standard request-header fields defined by HTTP/1.1; these are headers that may be included in a client request.

HTTP Request Headers

HTTP Request Headers
Header	Function
Accept	Specifies the acceptable MIME types
Accept-Charset	Specifies the acceptable character sets
Accept-Encoding	Specifies the acceptable data encodings
Accept-Language	Specifies the acceptable language
Authorization	Specifies client authentication credentials
Expect	Specifies server behaviour required by the client
From	Specifies the client's email address
Host	Specifies the server address being accessed
If-Match	Performs the request if certain criteria are met
If-Modified-Since	Performs the request if the object has been modified after given date
If-None-Match	Performs the request if certain criteria are met
If-Range	Returns range of object if conditionals match
If-Unmodified-Since	Performs the request if the object has not been modified
Max-Forwards	Specifies a proxy forwarding limit
Proxy-Authorization	Specifies authentication credentials for the proxy
Range	Specifies the part of an object that is required
Referer	Specifies the document that led to this request
TE	Specifies the accetable transfer encodings
User-Agent	Identifies the client software