From f933449d3b6c24e66d4a0c590bca3e7b2a39140d Mon Sep 17 00:00:00 2001 From: Daniel Stenberg Date: Tue, 6 Aug 2019 11:30:08 +0200 Subject: CURLINFO_RETRY_AFTER: parse the Retry-After header value This is only the libcurl part that provides the information. There's no user of the parsed value. This change includes three new tests for the parser. Ref: #3794 --- docs/libcurl/curl_easy_getinfo.3 | 3 ++ docs/libcurl/opts/CURLINFO_RETRY_AFTER.3 | 63 ++++++++++++++++++++++++++++++++ docs/libcurl/opts/Makefile.inc | 1 + docs/libcurl/symbols-in-versions | 1 + 4 files changed, 68 insertions(+) create mode 100644 docs/libcurl/opts/CURLINFO_RETRY_AFTER.3 (limited to 'docs/libcurl') diff --git a/docs/libcurl/curl_easy_getinfo.3 b/docs/libcurl/curl_easy_getinfo.3 index bd66fd51a..c7b124a24 100644 --- a/docs/libcurl/curl_easy_getinfo.3 +++ b/docs/libcurl/curl_easy_getinfo.3 @@ -157,6 +157,9 @@ Upload size. See \fICURLINFO_CONTENT_LENGTH_UPLOAD_T(3)\fP .IP CURLINFO_CONTENT_TYPE Content type from the Content-Type header. See \fICURLINFO_CONTENT_TYPE(3)\fP +.IP CURLINFO_RETRY_AFTER +The value from the from the Retry-After header. +See \fICURLINFO_RETRY_AFTER(3)\fP .IP CURLINFO_PRIVATE User's private data pointer. See \fICURLINFO_PRIVATE(3)\fP diff --git a/docs/libcurl/opts/CURLINFO_RETRY_AFTER.3 b/docs/libcurl/opts/CURLINFO_RETRY_AFTER.3 new file mode 100644 index 000000000..9e58ca62d --- /dev/null +++ b/docs/libcurl/opts/CURLINFO_RETRY_AFTER.3 @@ -0,0 +1,63 @@ +.\" ************************************************************************** +.\" * _ _ ____ _ +.\" * Project ___| | | | _ \| | +.\" * / __| | | | |_) | | +.\" * | (__| |_| | _ <| |___ +.\" * \___|\___/|_| \_\_____| +.\" * +.\" * Copyright (C) 1998 - 2019, Daniel Stenberg, , 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 CURLINFO_RETRY_AFTER 3 "6 Aug 2019" "libcurl 7.66.0" "curl_easy_getinfo options" +.SH NAME +CURLINFO_RETRY_AFTER \- returns the Retry-After retry delay +.SH SYNOPSIS +#include + +CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_RETRY_AFTER, curl_off_t *retry); +.SH DESCRIPTION +Pass a pointer to a curl_off_t variable to receive the number of seconds the +HTTP server suggesets the client should wait until the next request is +issued. The information from the "Retry-After:" header. + +While the HTTP header might contain a fixed date string, the +\fICURLINFO_RETRY_AFTER(3)\fP will alwaus return number of seconds to wait - +or zero if there was no header or the header couldn't be parsed. +.SH DEFAULT +Returns zero delay if there was no header. +.SH PROTOCOLS +HTTP(S) +.SH EXAMPLE +.nf +CURL *curl = curl_easy_init(); +if(curl) { + CURLcode res; + curl_easy_setopt(curl, CURLOPT_URL, "http://example.com"); + res = curl_easy_perform(curl); + if(res == CURLE_OK) { + curl_off_t wait = 0; + curl_easy_getinfo(curl, CURLINFO_RETRY_AFTER, &wait); + if(wait) + printf("Wait for %" CURL_FORMAT_CURL_OFF_T " seconds\\n", wait); + } + curl_easy_cleanup(curl); +} +.fi +.SH AVAILABILITY +Added in curl 7.66.0 +.SH RETURN VALUE +Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not. +.SH "SEE ALSO" +.BR CURLOPT_STDERR "(3), " CURLOPT_HEADERFUNCTION "(3), " diff --git a/docs/libcurl/opts/Makefile.inc b/docs/libcurl/opts/Makefile.inc index 094c58f42..b7cd7a698 100644 --- a/docs/libcurl/opts/Makefile.inc +++ b/docs/libcurl/opts/Makefile.inc @@ -43,6 +43,7 @@ man_MANS = \ CURLINFO_REDIRECT_URL.3 \ CURLINFO_REQUEST_SIZE.3 \ CURLINFO_RESPONSE_CODE.3 \ + CURLINFO_RETRY_AFTER.3 \ CURLINFO_RTSP_CLIENT_CSEQ.3 \ CURLINFO_RTSP_CSEQ_RECV.3 \ CURLINFO_RTSP_SERVER_CSEQ.3 \ diff --git a/docs/libcurl/symbols-in-versions b/docs/libcurl/symbols-in-versions index 49175e0f5..79243e25b 100644 --- a/docs/libcurl/symbols-in-versions +++ b/docs/libcurl/symbols-in-versions @@ -267,6 +267,7 @@ CURLINFO_REDIRECT_TIME_T 7.61.0 CURLINFO_REDIRECT_URL 7.18.2 CURLINFO_REQUEST_SIZE 7.4.1 CURLINFO_RESPONSE_CODE 7.10.8 +CURLINFO_RETRY_AFTER 7.66.0 CURLINFO_RTSP_CLIENT_CSEQ 7.20.0 CURLINFO_RTSP_CSEQ_RECV 7.20.0 CURLINFO_RTSP_SERVER_CSEQ 7.20.0 -- cgit v1.2.3