CURLOPT_PROXYTYPE explained

Name

CURLOPT_PROXYTYPE - proxy protocol type

Synopsis

#include <curl/curl.h>
 
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXYTYPE, long type);

Description

Pass one of the values below to set the type of the proxy.

CURLPROXY_HTTP

HTTP Proxy. Default.

CURLPROXY_HTTPS

HTTPS Proxy using HTTP/1. (Added in 7.52.0 for OpenSSL and GnuTLS. Since 7.87.0, it also works for BearSSL, mbedTLS, Rustls, Schannel, Secure Transport and wolfSSL.)

CURLPROXY_HTTPS2

HTTPS Proxy and attempt to speak HTTP/2 over it. (Added in 8.1.0)

CURLPROXY_HTTP_1_0

HTTP 1.0 Proxy. This is similar to CURLPROXY_HTTP except it uses HTTP/1.0 for any CONNECT tunneling. It does not change the HTTP version of the actual HTTP requests, controlled by CURLOPT_HTTP_VERSION.

CURLPROXY_SOCKS4

SOCKS4 Proxy.

CURLPROXY_SOCKS4A

SOCKS4a Proxy. Proxy resolves URL hostname.

CURLPROXY_SOCKS5

SOCKS5 Proxy.

CURLPROXY_SOCKS5_HOSTNAME

SOCKS5 Proxy. Proxy resolves URL hostname.

Often it is more convenient to specify the proxy type with the scheme part of the CURLOPT_PROXY string.

Default

CURLPROXY_HTTP

Protocols

This functionality affects all supported protocols

Example

int main(void)
{
  CURL *curl = curl_easy_init();
  if(curl) {
    CURLcode ret;
    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
    curl_easy_setopt(curl, CURLOPT_PROXY, "local.example.com:1080");
    /* set the proxy type */
    curl_easy_setopt(curl, CURLOPT_PROXYTYPE, (long)CURLPROXY_SOCKS5);
    ret = curl_easy_perform(curl);
    curl_easy_cleanup(curl);
  }
}

Availability

Added in curl 7.10

Return value

curl_easy_setopt returns a CURLcode indicating success or error.

CURLE_OK (0) means everything was OK, non-zero means an error occurred, see libcurl-errors.