CURLINFO_HEADER_SIZE - get size of retrieved headers
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_HEADER_SIZE, long *sizep);
Pass a pointer to a long to receive the total size of all the headers received. Measured in number of bytes.
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
curl_easy_getinfo (3), curl_easy_setopt (3), CURLINFO_REQUEST_SIZE, CURLINFO_SIZE_DOWNLOAD
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