Content-Length

The HTTP Content-Length header indicates the length of the message body, in bytes.

Usage

The Content-Length header is sent as part of a HTTP response to indicate the number of bytes long the message body is. It can be used by the client to verify that the entire message has been received. Also, for lengthy messages, it can be used to estimate transmission time.

Response

Content-Length: <bytes>

Takeaway

The Content-Length header informs the client of how many bytes compose the message body of an HTTP response.

See also

• HTTP headers