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CURLOPT_ALTSVC_CTRL.3: mention conn reuse is preferred

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Ref: https://github.com/curl/curl/discussions/7954

Closes #7957
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Daniel Stenberg 2021-11-04 11:26:46 +01:00
parent 57370855d0
commit c6a66ccb5f
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1 changed files with 6 additions and 2 deletions
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8
docs/libcurl/opts/CURLOPT_ALTSVC_CTRL.3
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@ -5,7 +5,7 @@
.\" * | (__| |_| | _ <| |___ .\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____| .\" * \___|\___/|_| \_\_____|
.\" * .\" *
.\" * Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al. .\" * Copyright (C) 1998 - 2021, Daniel Stenberg, <daniel@haxx.se>, et al.
.\" * .\" *
.\" * This software is licensed as described in the file COPYING, which .\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms .\" * you should have received as part of this distribution. The terms
@ -38,11 +38,15 @@ CURLcode curl_easy_setopt(CURL *handle, CURLOPT_ALTSVC_CTRL, long bitmask);
Populate the long \fIbitmask\fP with the correct set of features to instruct Populate the long \fIbitmask\fP with the correct set of features to instruct
libcurl how to handle Alt-Svc for the transfers using this handle. libcurl how to handle Alt-Svc for the transfers using this handle.
libcurl will only accept Alt-Svc headers over a secure transport, meaning libcurl only accepts Alt-Svc headers over a secure transport, meaning
HTTPS. It will also only complete a request to an alternative origin if that HTTPS. It will also only complete a request to an alternative origin if that
origin is properly hosted over HTTPS. These requirements are there to make origin is properly hosted over HTTPS. These requirements are there to make
sure both the source and the destination are legitimate. sure both the source and the destination are legitimate.
Alternative services are only used when setting up new connections. If there
exists an existing connection to the host in the connection pool, then that
will be preferred.
Setting any bit will enable the alt-svc engine. Setting any bit will enable the alt-svc engine.
.IP "CURLALTSVC_READONLYFILE" .IP "CURLALTSVC_READONLYFILE"
Do not write the alt-svc cache back to the file specified with Do not write the alt-svc cache back to the file specified with