CURLOPT_PROXYUSERNAME - Man Page

#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXYUSERNAME,
                          char *username);

Pass a char pointer as parameter, which should be pointing to the null-terminated username to use for the transfer.

CURLOPT_PROXYUSERNAME(3) sets the username 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.

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This functionality affects all supported protocols

int main(void)
{
  CURL *curl = curl_easy_init();
  if(curl) {
    CURLcode res;
    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");
    res = curl_easy_perform(curl);
    curl_easy_cleanup(curl);
  }
}

Added in curl 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.

CURLOPT_HTTPAUTH(3), CURLOPT_PROXYAUTH(3), CURLOPT_PROXYPASSWORD(3), CURLOPT_USERNAME(3)

curl_easy_setopt(3), CURLOPT_PROXYPASSWORD(3), CURLOPT_PROXYUSERPWD(3), libcurl-symbols(3).