curlopt_pre_proxy(3) [mojave man page]
CURLOPT_PRE_PROXY(3) curl_easy_setopt options CURLOPT_PRE_PROXY(3) NAME
CURLOPT_PRE_PROXY - set pre-proxy to use SYNOPSIS
#include <curl/curl.h> CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PRE_PROXY, char *preproxy); DESCRIPTION
Set the preproxy to use for the upcoming request. The parameter should be a char * to a zero terminated string holding the host name or dotted numerical IP address. A numerical IPv6 address must be written within [brackets]. To specify port number in this string, append :[port] to the end of the host name. The proxy's port number may optionally be specified with the separate option CURLOPT_PROXYPORT(3). If not specified, libcurl will default to using port 1080 for proxies. A pre proxy is a SOCKS proxy that curl connects to before it connects to the HTTP(S) proxy specified in the CURLOPT_PROXY option. The pre proxy can only be a SOCKS proxy. The pre proxy string should be prefixed with [scheme]:// to specify which kind of socks is used. Use socks4://, socks4a://, socks5:// or socks5h:// (the last one to enable socks5 and asking the proxy to do the resolving, also known as CURLPROXY_SOCKS5_HOSTNAME type) to request the specific SOCKS version to be used. Otherwise SOCKS4 is used as default. Setting the pre proxy string to "" (an empty string) will explicitly disable the use of a pre proxy. The application does not have to keep the string around after setting this option. DEFAULT
Default is NULL, meaning no pre proxy is used. When you set a host name to use, do not assume that there's any particular single port number used widely for proxies. Specify it! PROTOCOLS
All except file://. Note that some protocols don't do very well over proxy. EXAMPLE
TODO AVAILABILITY
Added in 7.52.0 RETURN VALUE
Returns CURLE_OK if proxies are supported, CURLE_UNKNOWN_OPTION if not, or CURLE_OUT_OF_MEMORY if there was insufficient heap space. SEE ALSO
CURLOPT_PROXY(3), CURLOPT_HTTPPROXYTUNNEL(3), libcurl 7.54.0 December 21, 2016 CURLOPT_PRE_PROXY(3)
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CURLOPT_PROXY_CAINFO(3) curl_easy_setopt options CURLOPT_PROXY_CAINFO(3) NAME
CURLOPT_PROXY_CAINFO - path to proxy Certificate Authority (CA) bundle SYNOPSIS
#include <curl/curl.h> CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXY_CAINFO, char *path); DESCRIPTION
This option is for connecting to a HTTPS proxy, not a HTTPS server. Pass a char * to a zero terminated string naming a file holding one or more certificates to verify the HTTPS proxy with. If CURLOPT_PROXY_SSL_VERIFYPEER(3) is zero and you avoid verifying the server's certificate, CURLOPT_PROXY_CAINFO(3) need not even indicate an accessible file. This option is by default set to the system path where libcurl's cacert bundle is assumed to be stored, as established at build time. If curl is built against the NSS SSL library, the NSS PEM PKCS#11 module (libnsspem.so) needs to be available for this option to work prop- erly. (iOS and macOS only) If curl is built against Secure Transport, then this option is supported for backward compatibility with other SSL engines, but it should not be set. If the option is not set, then curl will use the certificates in the system and user Keychain to verify the peer, which is the preferred method of verifying the peer's certificate chain. The application does not have to keep the string around after setting this option. DEFAULT
Built-in system specific PROTOCOLS
Used with HTTPS proxy EXAMPLE
TODO AVAILABILITY
Added in 7.52.0 For TLS backends that don't support certificate files, the CURLOPT_PROXY_CAINFO(3) option is ignored. Refer to https://curl.haxx.se/docs/ssl-compared.html RETURN VALUE
Returns CURLE_OK if the option is supported, CURLE_UNKNOWN_OPTION if not, or CURLE_OUT_OF_MEMORY if there was insufficient heap space. SEE ALSO
CURLOPT_PROXY_CAPATH(3), CURLOPT_PROXY_SSL_VERIFYPEER(3), CURLOPT_PROXY_SSL_VERIFYHOST(3), CURLOPT_CAPATH(3), CURLOPT_SSL_VERIFYPEER(3), CURLOPT_SSL_VERIFYHOST(3), libcurl 7.54.0 December 21, 2016 CURLOPT_PROXY_CAINFO(3)