Connection general header controls whether the
network connection stays open after the current transaction finishes. If the value sent
keep-alive, the connection is persistent and not closed, allowing for
subsequent requests to the same server to be done.
Warning: Connection-specific header fields such as
Keep-Alive are prohibited
in HTTP/2 and
HTTP/3. Chrome and
Firefox ignore them in HTTP/2 responses, but Safari conforms to the HTTP/2
spec requirements and does not load any response that contains them.
All hop-by-hop headers used by the message - including standard hop-by-hop headers (
Proxy-Authenticate) - must be listed in the
header, so that the first proxy knows it has to consume them and not forward them
|Header type||Request header, Response header|
|Forbidden header name||yes|
Connection: keep-alive Connection: close
Indicates that either the client or the server would like to close the connection. This is the default on HTTP/1.0 requests.
- any comma-separated list of HTTP headers [Usually
Indicates that the client would like to keep the connection open. Keeping a connection open is the default on HTTP/1.1 requests. The list of headers are the name of the header to be removed by the first non-transparent proxy or cache in-between: these headers define the connection between the emitter and the first entity, not the destination node.
|HTTP Semantics |
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