#include <curl/curl.h> CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXYUSERNAME, char *username);
CURLOPT_PROXYUSERNAME(3) sets the user name to be used in protocol authentication with the proxy.
To specify the proxy password use the CURLOPT_PROXYPASSWORD(3).
The application does not have to keep the string around after setting this option.
CURL *curl = curl_easy_init(); if(curl) { curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/foo.bin"); curl_easy_setopt(curl, CURLOPT_PROXY, "http://localhost:8080"); curl_easy_setopt(curl, CURLOPT_PROXYUSERNAME, "mrsmith"); curl_easy_setopt(curl, CURLOPT_PROXYPASSWORD, "qwerty"); ret = curl_easy_perform(curl); curl_easy_cleanup(curl); }