HTTP Response

External

• RFC 2616 Section 6 Response https://www.w3.org/Protocols/rfc2616/rfc2616-sec6.html

Internal

• HTTP
• HTTP Request

Overview

A HTTP response consists of a status line, followed by an optional set of headers, followed by blank line followed by an optional message body.

This is a simple example:

HTTP/1.1 200 OK
Content-Type: text/html
HttpServer: Test Server
Content-Length: 1024

...
...

The Response Status Line

The status line starts with the protocol version followed by a numeric status code and its associated reason phrase, with each element separated by space. No CR or LF is allowed except in the final CRLF sequence.

Example:

HTTP/1.1 200 OK

Status Code

The status code is also called response code.

For more details about the status code, see

HTTP Status Codes

The Headers

http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html

http://en.wikipedia.org/wiki/List_of_HTTP_headers

The headers included with a response are part of one of the following category:

General Headers

General Headers

Response Headers

The response headers allow the server to pass additional information about the response which cannot be placed in the status line.

• Accept-Ranges
• Age
• ETag
• Location
• Proxy-Authenticate
• Retry-After
• Server
• Vary
• WWW-Authenticate

Entity Headers

Entity Headers

The HTTP Response Body

The optional response body is referred to as the HTTP entity:

HTTP Entity