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conn: check for connection being dead before reuse

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Prevents incorrect reuse of an HTTP connection that has been prematurely
shutdown() by the server.

Partial revert of 755083d00d

Fixes #5884
Closes #5893
This commit is contained in:
Chris Paulson-Ellis 2020-08-29 18:26:50 +01:00 committed by Daniel Stenberg
parent 8b69ac0c10
commit 728f8d3bdc
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1 changed files with 6 additions and 0 deletions
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6
lib/url.c
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@ -1120,6 +1120,12 @@ ConnectionExists(struct Curl_easy *data,
/* connect-only or to-be-closed connections will not be reused */
continue;
if(extract_if_dead(check, data)) {
/* disconnect it */
(void)Curl_disconnect(data, check, /* dead_connection */TRUE);
continue;
}
if(bundle->multiuse == BUNDLE_MULTIPLEX)
multiplexed = CONN_INUSE(check);