Libcurl Proxies

Libcurl Proxies Proxies are settings within the libcurl library that allow users to specify certain network proxies to be used for web communication requests. These proxy settings help control and reroute web traffic through specified servers for security, anonymity, or bypassing regional restrictions. It supports various types of proxies such as HTTP, HTTPS, and SOCKS.

How to use a proxy with Libcurl?

To use a proxy with Libcurl, you need to set the proxy details using the CURL option CURLOPT_PROXY with the curl_easy_setopt() function. You need to pass the proxy address as a C string to this function. For example, if your proxy is at ‘http://proxy.example.com:8080’, you would use the following line of code: curl_easy_setopt(curl_handle, CURLOPT_PROXY, ‘http://proxy.example.com:8080’);

How to use SOCKS proxy with Libcurl?

To use a SOCKS proxy with Libcurl, you need to specify the proxy type with the CURL option CURLOPT_PROXYTYPE with the curl_easy_setopt() function. The values can be CURLPROXY_SOCKS4, CURLPROXY_SOCKS5, CURLPROXY_SOCKS4A or CURLPROXY_SOCKS5_HOSTNAME. To use a SOCKS5 proxy located at ‘socks5h://proxy.example.com:1080’, you would use the following lines of code: curl_easy_setopt(curl_handle, CURLOPT_PROXY, ‘socks5h://proxy.example.com:1080’); curl_easy_setopt(curl_handle, CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5);

How to authenticate a proxy with Libcurl?

To authenticate a proxy with Libcurl, you need to specify the username and password using the CURL option CURLOPT_PROXYUSERPWD with the curl_easy_setopt() function. The username and password need to be in the format ‘username:password’. For example, if your username is ‘user’ and password is ‘password’, you would use the following line of code: curl_easy_setopt(curl_handle, CURLOPT_PROXYUSERPWD, ‘user:password’);