CURLOPT_IGNORE_CONTENT_LENGTH (3) - Linux Manuals
CURLOPT_IGNORE_CONTENT_LENGTH: ignore Content-Length in HTTP response
NAME
CURLOPT_IGNORE_CONTENT_LENGTH - ignore Content-Length in HTTP responseSYNOPSIS
#include <curl/curl.h> CURLcode curl_easy_setopt(CURL *handle, CURLOPT_IGNORE_CONTENT_LENGTH, long ignore);
DESCRIPTION
If ignore is set to 1, ignore the Content-Length header in the HTTP response. This is useful for Apache 1.x (and similar servers) which will report incorrect content length for files over 2 gigabytes. If this option is used, curl will not be able to accurately report progress, and will simply stop the download when the server ends the connection.Only use this option if strictly necessary.