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_SUPPRESS_CONNECT_HEADERS(3) curl_easy_setopt options CURLOPT_SUPPRESS_CONNECT_HEADERS(3) NAME
CURLOPT_SUPPRESS_CONNECT_HEADERS - Suppress proxy CONNECT response headers from user callbacks SYNOPSIS
#include <curl/curl.h> CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SUPPRESS_CONNECT_HEADERS, long onoff); DESCRIPTION
When CURLOPT_HTTPPROXYTUNNEL(3) is used and a CONNECT request is made, suppress proxy CONNECT response headers from the user callback func- tions CURLOPT_HEADERFUNCTION(3) and CURLOPT_WRITEFUNCTION(3). Proxy CONNECT response headers can complicate header processing since it's essentially a separate set of headers. You can enable this option to suppress those headers. For example let's assume an HTTPS URL is to be retrieved via CONNECT. On success there would normally be two sets of headers, and each header line sent to the header function and/or the write function. The data given to the callbacks would look like this: HTTP/1.1 200 Connection established {headers}... HTTP/1.1 200 OK Content-Type: application/json {headers}... {body}... However by enabling this option the CONNECT response headers are suppressed, so the data given to the callbacks would look like this: HTTP/1.1 200 OK Content-Type: application/json {headers}... {body}... DEFAULT
0 PROTOCOLS
All EXAMPLE
CURL *curl = curl_easy_init(); if(curl) { curl_easy_setopt(curl, CURLOPT_URL, "https://example.com"); curl_easy_setopt(curl, CURLOPT_HEADER, 1L); curl_easy_setopt(curl, CURLOPT_PROXY, "http://foo:3128"); curl_easy_setopt(curl, CURLOPT_HTTPPROXYTUNNEL, 1L); curl_easy_setopt(curl, CURLOPT_SUPPRESS_CONNECT_HEADERS, 1L); curl_easy_perform(curl); /* always cleanup */ curl_easy_cleanup(curl); } AVAILABILITY
Added in 7.54.0 RETURN VALUE
CURLE_OK or an error such as CURLE_UNKNOWN_OPTION. SEE ALSO
CURLOPT_HEADER(3), CURLOPT_PROXY(3), CURLOPT_HTTPPROXYTUNNEL(3), libcurl 7.54.0 April 28, 2016 CURLOPT_SUPPRESS_CONNECT_HEADERS(3)