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curl: Add --retry-connrefused

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to consider ECONNREFUSED as a transient error.

Closes #1064
This commit is contained in:
Daniel Hwang 2016-10-09 16:00:25 -07:00 committed by Daniel Stenberg
parent ea80a2dcfc
commit cdfda3ee82
5 changed files with 24 additions and 1 deletions
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4
docs/curl.1
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@ -1620,6 +1620,10 @@ also \fI--retry-max-time\fP to limit the total time allowed for
retries. (Added in 7.12.3)
If this option is used several times, the last one will be used.
.IP "--retry-connrefused"
In addition to the other conditions, consider ECONNREFUSED as a transient
error too for \fI--retry\fP. This option is used together with
\fI--retry\fP. (Added in 7.52.0)
.IP "--retry-delay <seconds>"
Make curl sleep this amount of time before each retry when a transfer has
failed with a transient error (it changes the default backoff time algorithm

1
src/tool_cfgable.h
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@ -176,6 +176,7 @@ struct OperationConfig {
bool tcp_nodelay;
bool tcp_fastopen;
long req_retry; /* number of retries */
bool retry_connrefused; /* set connection refused as a transient error */
long retry_delay; /* delay between retries (in seconds) */
long retry_maxtime; /* maximum time to keep retrying */

4
src/tool_getparam.c
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@ -125,6 +125,7 @@ static const struct LongShort aliases[]= {
{"$e", "proxy-digest", FALSE},
{"$f", "proxy-basic", FALSE},
{"$g", "retry", TRUE},
{"$V", "retry-connrefused", FALSE},
{"$h", "retry-delay", TRUE},
{"$i", "retry-max-time", TRUE},
{"$k", "proxy-negotiate", FALSE},
@ -793,6 +794,9 @@ ParameterError getparameter(char *flag, /* f or -long-flag */
if(err)
return err;
break;
case 'V': /* --retry-connrefused */
config->retry_connrefused = toggle;
break;
case 'h': /* --retry-delay */
err = str2unum(&config->retry_delay, nextarg);
if(err)

2
src/tool_help.c
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@ -198,6 +198,8 @@ static const char *const helptext[] = {
" --resolve HOST:PORT:ADDRESS Force resolve of HOST:PORT to ADDRESS",
" --retry NUM "
"Retry request NUM times if transient problems occur",
" --retry-connrefused "
"Consider \"connection refused\" a transient error",
" --retry-delay SECONDS Wait SECONDS between retries",
" --retry-max-time SECONDS Retry only within this period",
" --sasl-ir Enable initial response in SASL authentication",

14
src/tool_operate.c
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@ -1441,6 +1441,7 @@ static CURLcode operate_do(struct GlobalConfig *global,
enum {
RETRY_NO,
RETRY_TIMEOUT,
RETRY_CONNREFUSED,
RETRY_HTTP,
RETRY_FTP,
RETRY_LAST /* not used */
@ -1452,6 +1453,13 @@ static CURLcode operate_do(struct GlobalConfig *global,
(CURLE_FTP_ACCEPT_TIMEOUT == result))
/* retry timeout always */
retry = RETRY_TIMEOUT;
else if(config->retry_connrefused &&
(CURLE_COULDNT_CONNECT == result)) {
long oserrno;
curl_easy_getinfo(curl, CURLINFO_OS_ERRNO, &oserrno);
if(ECONNREFUSED == oserrno)
retry = RETRY_CONNREFUSED;
}
else if((CURLE_OK == result) ||
(config->failonerror &&
(CURLE_HTTP_RETURNED_ERROR == result))) {
@ -1499,7 +1507,11 @@ static CURLcode operate_do(struct GlobalConfig *global,
if(retry) {
static const char * const m[]={
NULL, "timeout", "HTTP error", "FTP error"
NULL,
"timeout",
"connection refused",
"HTTP error",
"FTP error"
};
warnf(config->global, "Transient problem: %s "