CURLOPT_PROXYUSERNAME - user name to use for proxy authentication
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXYUSERNAME,
Pass a char * as parameter, which should be pointing to the zero terminated user
name to use for the transfer.
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
CURL *curl = curl_easy_init();
curl_easy_setopt(curl, CURLOPT_URL, "http://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);
Added in 7.19.1
Returns CURLE_OK if the option is supported, CURLE_UNKNOWN_OPTION if not, or
CURLE_OUT_OF_MEMORY if there was insufficient heap space.