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.TH CURLINFO_HEADER_SIZE 3 "January 02, 2023" "libcurl 7.88.1" "curl_easy_getinfo options"

.SH NAME
CURLINFO_HEADER_SIZE \- get size of retrieved headers
.SH SYNOPSIS
.nf
#include <curl/curl.h>

CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_HEADER_SIZE, long *sizep);
.fi
.SH DESCRIPTION
Pass a pointer to a long to receive the total size of all the headers
received. Measured in number of bytes.

The total includes the size of any received headers suppressed by
\fICURLOPT_SUPPRESS_CONNECT_HEADERS(3)\fP.
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
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) {
    long size;
    res = curl_easy_getinfo(curl, CURLINFO_HEADER_SIZE, &size);
    if(!res)
      printf("Header size: %ld bytes\\n", size);
  }
  curl_easy_cleanup(curl);
}
.fi
.SH AVAILABILITY
Added in 7.4.1
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo "(3), " curl_easy_setopt "(3), "
.BR CURLINFO_REQUEST_SIZE "(3), "
.BR CURLINFO_SIZE_DOWNLOAD "(3), "