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docs: Add more HTTPS proxy documentation
- Document HTTPS proxy type.
- Document --write-out %{proxy_ssl_verify_result}.
- Document SOCKS proxy + HTTP/HTTPS proxy combination.
HTTPS proxy support was added in 7.52.0 for OpenSSL, GnuTLS and NSS.
Ref: https://github.com/curl/curl/commit/cb4e2be
This commit is contained in:
Jay Satiro
parent
a49d2d0e25
commit
423a93ce32
@ -5,11 +5,16 @@ Help: Use this proxy
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---
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Use the specified proxy.
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The proxy string can be specified with a protocol:// prefix to specify
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alternative proxy protocols. Use socks4://, socks4a://, socks5:// or
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socks5h:// to request the specific SOCKS version to be used. No protocol
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specified, http:// and all others will be treated as HTTP proxies. (The
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protocol support was added in curl 7.21.7)
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The proxy string can be specified with a protocol:// prefix. No protocol
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specified or http:// will be treated as HTTP proxy. Use socks4://, socks4a://,
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socks5:// or socks5h:// to request a specific SOCKS version to be used.
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(The protocol support was added in curl 7.21.7)
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HTTPS proxy support via https:// protocol prefix was added in 7.52.0 for
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OpenSSL, GnuTLS and NSS.
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Unrecognized and unsupported proxy protocols cause an error since 7.52.0.
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Prior versions may ignore the protocol and use http:// instead.
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If the port number is not specified in the proxy string, it is assumed to be
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1080.
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@ -6,10 +6,12 @@ Added: 7.15.2
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Use the specified SOCKS4 proxy. If the port number is not specified, it is
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assumed at port 1080.
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This option overrides any previous use of --proxy, as they are mutually
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exclusive.
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Since 7.21.7, this option is superfluous since you can specify a socks4 proxy
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with --proxy using a socks4:// protocol prefix.
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This option typically overrides any previous use of --proxy; however since
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7.52.0 if --proxy is used to specify an HTTP or HTTPS proxy then curl will
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attempt to use it with the SOCKS proxy. In such a case curl first connects to
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the SOCKS proxy and then connects (through SOCKS) to the HTTP or HTTPS proxy.
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If this option is used several times, the last one will be used.
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@ -6,10 +6,12 @@ Added: 7.18.0
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Use the specified SOCKS4a proxy. If the port number is not specified, it is
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assumed at port 1080.
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This option overrides any previous use of --proxy, as they are mutually
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exclusive.
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Since 7.21.7, this option is superfluous since you can specify a socks4a proxy
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with --proxy using a socks4a:// protocol prefix.
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This option typically overrides any previous use of --proxy; however since
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7.52.0 if --proxy is used to specify an HTTP or HTTPS proxy then curl will
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attempt to use it with the SOCKS proxy. In such a case curl first connects to
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the SOCKS proxy and then connects (through SOCKS) to the HTTP or HTTPS proxy.
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If this option is used several times, the last one will be used.
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@ -6,10 +6,12 @@ Added: 7.18.0
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Use the specified SOCKS5 proxy (and let the proxy resolve the host name). If
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the port number is not specified, it is assumed at port 1080.
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This option overrides any previous use of --proxy, as they are mutually
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exclusive.
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Since 7.21.7, this option is superfluous since you can specify a socks5
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hostname proxy with --proxy using a socks5h:// protocol prefix.
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This option typically overrides any previous use of --proxy; however since
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7.52.0 if --proxy is used to specify an HTTP or HTTPS proxy then curl will
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attempt to use it with the SOCKS proxy. In such a case curl first connects to
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the SOCKS proxy and then connects (through SOCKS) to the HTTP or HTTPS proxy.
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If this option is used several times, the last one will be used.
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@ -6,12 +6,14 @@ Added: 7.18.0
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Use the specified SOCKS5 proxy - but resolve the host name locally. If the
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port number is not specified, it is assumed at port 1080.
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This option overrides any previous use of --proxy, as they are mutually
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exclusive.
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Since 7.21.7, this option is superfluous since you can specify a socks5 proxy
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with --proxy using a socks5:// protocol prefix.
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This option typically overrides any previous use of --proxy; however since
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7.52.0 if --proxy is used to specify an HTTP or HTTPS proxy then curl will
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attempt to use it with the SOCKS proxy. In such a case curl first connects to
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the SOCKS proxy and then connects (through SOCKS) to the HTTP or HTTPS proxy.
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If this option is used several times, the last one will be used.
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This option (as well as --socks4) does not work with IPV6, FTPS or LDAP.
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@ -60,6 +60,10 @@ Number of new connects made in the recent transfer. (Added in 7.12.3)
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.B num_redirects
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Number of redirects that were followed in the request. (Added in 7.12.3)
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.TP
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.B proxy_ssl_verify_result
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The result of the HTTPS proxy's SSL peer certificate verification that was
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requested. 0 means the verification was successful. (Added in 7.52.0)
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.TP
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.B redirect_url
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When an HTTP request was made without -L to follow redirects, this variable
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will show the actual URL a redirect \fIwould\fP take you to. (Added in 7.18.2)
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@ -38,10 +38,22 @@ option \fICURLOPT_PROXYPORT(3)\fP. If not specified, libcurl will default to
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using port 1080 for proxies.
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The proxy string may be prefixed with [scheme]:// to specify which kind of
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proxy is used. Use socks4://, socks4a://, socks5:// or socks5h:// (the last
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one to enable socks5 and asking the proxy to do the resolving, also known as
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\fICURLPROXY_SOCKS5_HOSTNAME\fP type) to request the specific SOCKS version to
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be used. No scheme specified or http://, will be treated as HTTP proxies.
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proxy is used.
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.RS
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.IP http://
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HTTP Proxy. Default when no scheme or proxy type is specified.
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.IP https://
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HTTPS Proxy. (Added in 7.52.0 for OpenSSL, GnuTLS and NSS)
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.IP socks4://
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SOCKS4 Proxy.
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.IP socks4a://
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SOCKS4a Proxy. Proxy resolves URL hostname.
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.IP socks5://
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SOCKS5 Proxy.
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.IP socks5h://
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SOCKS5 Proxy. Proxy resolves URL hostname.
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.RE
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Without a scheme prefix, \fICURLOPT_PROXYTYPE(3)\fP can be used to specify
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which kind of proxy the string identifies.
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@ -28,15 +28,26 @@ CURLOPT_PROXYTYPE \- proxy protocol type
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CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXYTYPE, long type);
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.SH DESCRIPTION
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Pass a long with this option to set type of the proxy. Available options for
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this are \fICURLPROXY_HTTP\fP, \fICURLPROXY_HTTP_1_0\fP
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\fICURLPROXY_SOCKS4\fP, \fICURLPROXY_SOCKS5\fP, \fICURLPROXY_SOCKS4A\fP and
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\fICURLPROXY_SOCKS5_HOSTNAME\fP. The HTTP type is default.
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Pass one of the values below to set the type of the proxy.
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If you set \fICURLOPT_PROXYTYPE(3)\fP to \fICURLPROXY_HTTP_1_0\fP, it will
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only affect how libcurl speaks to a proxy when CONNECT is used. The HTTP
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version used for "regular" HTTP requests is instead controlled with
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\fICURLOPT_HTTP_VERSION(3)\fP.
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.RS
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.IP CURLPROXY_HTTP
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HTTP Proxy. Default.
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.IP CURLPROXY_HTTPS
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HTTPS Proxy. (Added in 7.52.0 for OpenSSL, GnuTLS and NSS)
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.IP CURLPROXY_HTTP_1_0
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HTTP 1.0 Proxy. This is very similar to CURLPROXY_HTTP except it uses HTTP/1.0
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for any CONNECT tunnelling. It does not change the HTTP version of the actual
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HTTP requests, controlled by \fICURLOPT_HTTP_VERSION(3)\fP.
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.IP CURLPROXY_SOCKS4
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SOCKS4 Proxy.
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.IP CURLPROXY_SOCKS4A
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SOCKS4a Proxy. Proxy resolves URL hostname.
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.IP CURLPROXY_SOCKS5
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SOCKS5 Proxy.
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.IP CURLPROXY_SOCKS5_HOSTNAME
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SOCKS5 Proxy. Proxy resolves URL hostname.
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.RE
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Often it is more convenient to specify the proxy type with the scheme part of
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the \fICURLOPT_PROXY(3)\fP string.
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