HTTP Headers Reference

Specifies the media types that the client can understand in the response.

Indicates which content encodings the client can decode.

Indicates the languages preferred by the client.

Carries credentials used to authenticate the client with a server.

Defines caching rules for requests and responses.

Controls whether the network connection remains open after the current exchange.

Indicates whether content should be displayed inline or downloaded as an attachment.

Specifies the encoding applied to the response body.

Reports the size of the message body in bytes.

Restricts which resources a browser may load and execute for a page.

Describes the media type and optional character encoding of the message body.

Sends cookies previously stored by the browser to the server.

Provides an identifier for a specific version of a resource.

Identifies the domain and optional port of the target server.

Requests the resource only when it has changed after the supplied date.

Requests the resource only when its current ETag differs from the supplied value.

Provides the target URL for a redirect or the location of a newly created resource.

Identifies the origin that initiated a cross-origin request.

Contains the address of the page that initiated the current request.

Creates or updates one cookie in the client.

Instructs browsers to access the domain only through HTTPS for a defined period.

Identifies the client software making the request.

Lists request headers that affect how a cached response was selected.

Describes the authentication method required to access a protected resource.

Prevents browsers from guessing a response media type different from Content-Type.

Identifies the originating client IP address when requests pass through proxies.

Controls whether a browser may display the page inside a frame.