2024-03-15 20:55:33 -06:00
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.\" generated by cd2nroff 0.1 from CURLINFO_XFER_ID.md
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2024-07-29 18:00:04 -06:00
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.TH CURLINFO_XFER_ID 3 "2024-07-29" libcurl
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.SH NAME
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CURLINFO_XFER_ID \- get the ID of a transfer
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.SH SYNOPSIS
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.nf
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#include <curl/curl.h>
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CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_XFER_ID,
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curl_off_t *xfer_id);
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.fi
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.SH DESCRIPTION
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Pass a pointer to a \fIcurl_off_t\fP to receive the identifier of the
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current/last transfer done with the handle. Stores \-1 if no transfer
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has been started yet for the handle.
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The transfer id is unique among all transfers performed using the same
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connection cache. This is implicitly the case for all transfers in the
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same multi handle.
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.SH PROTOCOLS
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This functionality affects all supported protocols
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.SH EXAMPLE
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.nf
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int main(void)
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{
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CURL *curl = curl_easy_init();
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if(curl) {
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CURLcode res;
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curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
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/* Perform the request */
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res = curl_easy_perform(curl);
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if(!res) {
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curl_off_t xfer_id;
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res = curl_easy_getinfo(curl, CURLINFO_XFER_ID, &xfer_id);
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if(!res) {
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printf("Transfer ID: %" CURL_FORMAT_CURL_OFF_T "\\n", xfer_id);
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}
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}
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}
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}
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.fi
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.SH AVAILABILITY
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Added in curl 8.2.0
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.SH RETURN VALUE
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Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
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.SH SEE ALSO
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.BR CURLINFO_CONN_ID (3),
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.BR curl_easy_getinfo (3),
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.BR curl_easy_setopt (3)
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