CURLINFO_REQUEST_SIZE - get size of sent request

Added in curl 7.4.1

Pass a pointer to a long to receive the total size of the issued requests. This is so far only for HTTP requests. Note that this may be more than one request if CURLOPT_FOLLOWLOCATION(3) is enabled.

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) { long req; res = curl_easy_getinfo(curl, CURLINFO_REQUEST_SIZE, &req); if(!res) printf("Request size: %ld bytes\n", req); } curl_easy_cleanup(curl); } }

CURLINFO_REQUEST_SIZE - get size of sent request

This functionality affects all supported protocols

curl_easy_getinfo(3) returns a CURLcode indicating success or error. CURLE_OK (0) means everything was OK, non-zero means an error occurred, see libcurl-errors(3).

CURLINFO_HEADER_SIZE(3), CURLINFO_SIZE_DOWNLOAD_T(3), curl_easy_getinfo(3), curl_easy_setopt(3) libcurl 2025-06-16 CURLINFO_REQUEST_SIZE(3)

#include <curl/curl.h> CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_REQUEST_SIZE, long *sizep);