curl / libcurl / API / curl_easy_getinfo / CURLINFO_RETRY_AFTER

CURLINFO_RETRY_AFTER explained

Name

CURLINFO_RETRY_AFTER - returns the Retry-After retry delay

Synopsis

#include <curl/curl.h>
 
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_RETRY_AFTER,
                           curl_off_t *retry);

Description

Pass a pointer to a curl_off_t variable to receive the number of seconds the HTTP server suggests 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 CURLINFO_RETRY_AFTER always returns the number of seconds to wait - or zero if there was no header or the header could not be parsed.

Default

Returns zero delay if there was no header.

Protocols

HTTP(S)

Example

int main(void)
{
  CURL *curl = curl_easy_init();
  if(curl) {
    CURLcode res;
    curl_easy_setopt(curl, CURLOPT_URL, "https://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);
  }
}

Availability

Added in 7.66.0

Return value

Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.