diff options
author | Daniel Stenberg <daniel@haxx.se> | 2018-09-07 10:28:57 +0200 |
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committer | Daniel Stenberg <daniel@haxx.se> | 2018-09-07 13:43:26 +0200 |
commit | 17ca0ccff4aeacc63bf7fa90314ea58d23464617 (patch) | |
tree | abcf11fd55789ba4fe8b720b362a231d2b4be437 /docs/libcurl/curl_easy_upkeep.3 | |
parent | 7b655fcbadffc3a0297466f1527e05d4a8efe6b2 (diff) |
curl_easy_upkeep: removed 'conn' from the name
... including the associated option.
Fixes #2951
Closes #2952
Diffstat (limited to 'docs/libcurl/curl_easy_upkeep.3')
-rw-r--r-- | docs/libcurl/curl_easy_upkeep.3 | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/docs/libcurl/curl_easy_upkeep.3 b/docs/libcurl/curl_easy_upkeep.3 new file mode 100644 index 000000000..f705b61fb --- /dev/null +++ b/docs/libcurl/curl_easy_upkeep.3 @@ -0,0 +1,77 @@ +.\" ************************************************************************** +.\" * _ _ ____ _ +.\" * Project ___| | | | _ \| | +.\" * / __| | | | |_) | | +.\" * | (__| |_| | _ <| |___ +.\" * \___|\___/|_| \_\_____| +.\" * +.\" * Copyright (C) 1998 - 2018, Daniel Stenberg, <daniel@haxx.se>, et al. +.\" * +.\" * This software is licensed as described in the file COPYING, which +.\" * you should have received as part of this distribution. The terms +.\" * are also available at https://curl.haxx.se/docs/copyright.html. +.\" * +.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell +.\" * copies of the Software, and permit persons to whom the Software is +.\" * furnished to do so, under the terms of the COPYING file. +.\" * +.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY +.\" * KIND, either express or implied. +.\" * +.\" ************************************************************************** +.\" +.TH curl_easy_upkeep 3 "31 Oct 2018" "libcurl 7.62.0" "libcurl Manual" +.SH NAME +curl_easy_upkeep - Perform any connection upkeep checks. +.SH SYNOPSIS +.B #include <curl/curl.h> + +.BI "CURLcode curl_easy_upkeep(CURL *" handle ");" +.SH DESCRIPTION + +Some protocols have "connection upkeep" mechanisms. These mechanisms usually +send some traffic on existing connections in order to keep them alive; this +can prevent connections from being closed due to overzealous firewalls, for +example. + +Currently the only protocol with a connection upkeep mechanism is HTTP/2: when +the connection upkeep interval is exceeded and \fIcurl_easy_upkeep(3)\fP +is called, an HTTP/2 PING frame is sent on the connection. + +This function must be explicitly called in order to perform the upkeep work. +The connection upkeep interval is set with +\fICURLOPT_UPKEEP_INTERVAL_MS(3)\fP. + +.SH AVAILABILITY +Added in 7.62.0. +.SH RETURN VALUE +On success, returns \fBCURLE_OK\fP. + +On failure, returns the appropriate error code. + +.SH EXAMPLE +.nf +CURL *curl = curl_easy_init(); +if(curl) { + /* Make a connection to an HTTP/2 server. */ + curl_easy_setopt(curl, CURLOPT_URL, "https://example.com"); + + /* Set the interval to 30000ms / 30s */ + curl_easy_setopt(curl, CURLOPT_UPKEEP_INTERVAL_MS, 30000L); + + curl_easy_perform(curl); + + /* Perform more work here. */ + + /* While the connection is being held open, curl_easy_upkeep() can be + called. If curl_easy_upkeep() is called and the time since the last + upkeep exceeds the interval, then an HTTP/2 PING is sent. */ + curl_easy_upkeep(curl); + + /* Perform more work here. */ + + /* always cleanup */ + curl_easy_cleanup(curl); +} + +.fi |