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https://github.com/moparisthebest/curl
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cb4e2be7c6
* HTTPS proxies:
An HTTPS proxy receives all transactions over an SSL/TLS connection.
Once a secure connection with the proxy is established, the user agent
uses the proxy as usual, including sending CONNECT requests to instruct
the proxy to establish a [usually secure] TCP tunnel with an origin
server. HTTPS proxies protect nearly all aspects of user-proxy
communications as opposed to HTTP proxies that receive all requests
(including CONNECT requests) in vulnerable clear text.
With HTTPS proxies, it is possible to have two concurrent _nested_
SSL/TLS sessions: the "outer" one between the user agent and the proxy
and the "inner" one between the user agent and the origin server
(through the proxy). This change adds supports for such nested sessions
as well.
A secure connection with a proxy requires its own set of the usual SSL
options (their actual descriptions differ and need polishing, see TODO):
--proxy-cacert FILE CA certificate to verify peer against
--proxy-capath DIR CA directory to verify peer against
--proxy-cert CERT[:PASSWD] Client certificate file and password
--proxy-cert-type TYPE Certificate file type (DER/PEM/ENG)
--proxy-ciphers LIST SSL ciphers to use
--proxy-crlfile FILE Get a CRL list in PEM format from the file
--proxy-insecure Allow connections to proxies with bad certs
--proxy-key KEY Private key file name
--proxy-key-type TYPE Private key file type (DER/PEM/ENG)
--proxy-pass PASS Pass phrase for the private key
--proxy-ssl-allow-beast Allow security flaw to improve interop
--proxy-sslv2 Use SSLv2
--proxy-sslv3 Use SSLv3
--proxy-tlsv1 Use TLSv1
--proxy-tlsuser USER TLS username
--proxy-tlspassword STRING TLS password
--proxy-tlsauthtype STRING TLS authentication type (default SRP)
All --proxy-foo options are independent from their --foo counterparts,
except --proxy-crlfile which defaults to --crlfile and --proxy-capath
which defaults to --capath.
Curl now also supports %{proxy_ssl_verify_result} --write-out variable,
similar to the existing %{ssl_verify_result} variable.
Supported backends: OpenSSL, GnuTLS, and NSS.
* A SOCKS proxy + HTTP/HTTPS proxy combination:
If both --socks* and --proxy options are given, Curl first connects to
the SOCKS proxy and then connects (through SOCKS) to the HTTP or HTTPS
proxy.
TODO: Update documentation for the new APIs and --proxy-* options.
Look for "Added in 7.XXX" marks.
227 lines
8.2 KiB
Groff
227 lines
8.2 KiB
Groff
.\" **************************************************************************
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.\" * _ _ ____ _
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.\" * Project ___| | | | _ \| |
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.\" * / __| | | | |_) | |
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.\" * | (__| |_| | _ <| |___
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.\" * \___|\___/|_| \_\_____|
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.\" *
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.\" * Copyright (C) 1998 - 2016, Daniel Stenberg, <daniel@haxx.se>, et al.
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.\" *
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.\" * This software is licensed as described in the file COPYING, which
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.\" * you should have received as part of this distribution. The terms
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.\" * are also available at https://curl.haxx.se/docs/copyright.html.
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.\" *
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.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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.\" * copies of the Software, and permit persons to whom the Software is
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.\" * furnished to do so, under the terms of the COPYING file.
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.\" *
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.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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.\" * KIND, either express or implied.
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.\" *
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.\" **************************************************************************
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.\"
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.TH curl_easy_getinfo 3 "11 Feb 2009" "libcurl 7.19.4" "libcurl Manual"
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.SH NAME
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curl_easy_getinfo - extract information from a curl handle
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.SH SYNOPSIS
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.B #include <curl/curl.h>
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.B "CURLcode curl_easy_getinfo(CURL *curl, CURLINFO info, ... );"
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.SH DESCRIPTION
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Request internal information from the curl session with this function. The
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third argument \fBMUST\fP be a pointer to a long, a pointer to a char *, a
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pointer to a struct curl_slist * or a pointer to a double (as this
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documentation describes further down). The data pointed-to will be filled in
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accordingly and can be relied upon only if the function returns CURLE_OK. Use
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this function AFTER a performed transfer if you want to get transfer related
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data.
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You should not free the memory returned by this function unless it is
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explicitly mentioned below.
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.SH AVAILABLE INFORMATION
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The following information can be extracted:
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.IP CURLINFO_EFFECTIVE_URL
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Last used URL.
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See \fICURLINFO_EFFECTIVE_URL(3)\fP
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.IP CURLINFO_RESPONSE_CODE
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Last received response code.
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See \fICURLINFO_RESPONSE_CODE(3)\fP
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.IP CURLINFO_HTTP_CONNECTCODE
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Last proxy CONNECT response code.
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See \fICURLINFO_HTTP_CONNECTCODE(3)\fP
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.IP CURLINFO_HTTP_VERSION
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The http version used in the connection.
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See \fICURLINFO_HTTP_VERSION(3)\fP
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.IP CURLINFO_FILETIME
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Remote time of the retrieved document.
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See \fICURLINFO_FILETIME(3)\fP
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.IP CURLINFO_TOTAL_TIME
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Total time of previous transfer.
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See \fICURLINFO_TOTAL_TIME(3)\fP
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.IP CURLINFO_NAMELOOKUP_TIME
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Time from start until name resolving completed.
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See \fICURLINFO_NAMELOOKUP_TIME(3)\fP
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.IP CURLINFO_CONNECT_TIME
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Time from start until remote host or proxy completed.
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See \fICURLINFO_CONNECT_TIME(3)\fP
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.IP CURLINFO_APPCONNECT_TIME
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Time from start until SSL/SSH handshake completed.
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See \fICURLINFO_APPCONNECT_TIME(3)\fP
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.IP CURLINFO_PRETRANSFER_TIME
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Time from start until just before the transfer begins.
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See \fICURLINFO_PRETRANSFER_TIME(3)\fP
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.IP CURLINFO_STARTTRANSFER_TIME
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Time from start until just when the first byte is received.
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See \fICURLINFO_STARTTRANSFER_TIME(3)\fP
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.IP CURLINFO_REDIRECT_TIME
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Time taken for all redirect steps before the final transfer.
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See \fICURLINFO_REDIRECT_TIME(3)\fP
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.IP CURLINFO_REDIRECT_COUNT
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Total number of redirects that were followed.
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See \fICURLINFO_REDIRECT_COUNT(3)\fP
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.IP CURLINFO_REDIRECT_URL
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URL a redirect would take you to, had you enabled redirects.
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See \fICURLINFO_REDIRECT_URL(3)\fP
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.IP CURLINFO_SIZE_UPLOAD
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Number of bytes uploaded.
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See \fICURLINFO_SIZE_UPLOAD(3)\fP
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.IP CURLINFO_SIZE_DOWNLOAD
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Number of bytes downloaded.
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See \fICURLINFO_SIZE_DOWNLOAD(3)\fP
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.IP CURLINFO_SPEED_DOWNLOAD
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Average download speed.
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See \fICURLINFO_SPEED_DOWNLOAD(3)\fP
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.IP CURLINFO_SPEED_UPLOAD
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Average upload speed.
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See \fICURLINFO_SPEED_UPLOAD(3)\fP
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.IP CURLINFO_HEADER_SIZE
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Number of bytes of all headers received.
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See \fICURLINFO_HEADER_SIZE(3)\fP
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.IP CURLINFO_REQUEST_SIZE
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Number of bytes sent in the issued HTTP requests.
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See \fICURLINFO_REQUEST_SIZE(3)\fP
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.IP CURLINFO_SSL_VERIFYRESULT
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Certificate verification result.
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See \fICURLINFO_SSL_VERIFYRESULT(3)\fP
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.IP CURLINFO_PROXY_SSL_VERIFYRESULT
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Proxy certificate verification result.
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See \fICURLINFO_PROXY_SSL_VERIFYRESULT(3)\fP
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.IP CURLINFO_SSL_ENGINES
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A list of OpenSSL crypto engines.
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See \fICURLINFO_SSL_ENGINES(3)\fP
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.IP CURLINFO_CONTENT_LENGTH_DOWNLOAD
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Content length from the Content-Length header.
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See \fICURLINFO_CONTENT_LENGTH_DOWNLOAD(3)\fP
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.IP CURLINFO_CONTENT_LENGTH_UPLOAD
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Upload size.
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See \fICURLINFO_CONTENT_LENGTH_UPLOAD(3)\fP
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.IP CURLINFO_CONTENT_TYPE
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Content type from the Content-Type header.
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See \fICURLINFO_CONTENT_TYPE(3)\fP
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.IP CURLINFO_PRIVATE
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User's private data pointer.
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See \fICURLINFO_PRIVATE(3)\fP
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.IP CURLINFO_HTTPAUTH_AVAIL
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Available HTTP authentication methods.
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See \fICURLINFO_HTTPAUTH_AVAIL(3)\fP
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.IP CURLINFO_PROXYAUTH_AVAIL
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Available HTTP proxy authentication methods.
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See \fICURLINFO_PROXYAUTH_AVAIL(3)\fP
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.IP CURLINFO_OS_ERRNO
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The errno from the last failure to connect.
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See \fICURLINFO_OS_ERRNO(3)\fP
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.IP CURLINFO_NUM_CONNECTS
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Number of new successful connections used for previous transfer.
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See \fICURLINFO_NUM_CONNECTS(3)\fP
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.IP CURLINFO_PRIMARY_IP
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IP address of the last connection.
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See \fICURLINFO_PRIMARY_IP(3)\fP
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.IP CURLINFO_PRIMARY_PORT
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Port of the last connection.
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See \fICURLINFO_PRIMARY_PORT(3)\fP
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.IP CURLINFO_LOCAL_IP
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Local-end IP address of last connection.
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See \fICURLINFO_LOCAL_IP(3)\fP
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.IP CURLINFO_LOCAL_PORT
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Local-end port of last connection.
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See \fICURLINFO_LOCAL_PORT(3)\fP
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.IP CURLINFO_COOKIELIST
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List of all known cookies.
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See \fICURLINFO_COOKIELIST(3)\fP
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.IP CURLINFO_LASTSOCKET
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Last socket used.
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See \fICURLINFO_LASTSOCKET(3)\fP
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.IP CURLINFO_ACTIVESOCKET
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The session's active socket.
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See \fICURLINFO_ACTIVESOCKET(3)\fP
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.IP CURLINFO_FTP_ENTRY_PATH
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The entry path after logging in to an FTP server.
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See \fICURLINFO_FTP_ENTRY_PATH(3)\fP
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.IP CURLINFO_CERTINFO
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Certificate chain.
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See \fICURLINFO_CERTINFO(3)\fP
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.IP CURLINFO_TLS_SSL_PTR
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TLS session info that can be used for further processing.
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See \fICURLINFO_TLS_SSL_PTR(3)\fP
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.IP CURLINFO_TLS_SESSION
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TLS session info that can be used for further processing. See
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\fICURLINFO_TLS_SESSION(3)\fP. Deprecated option, use
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\fICURLINFO_TLS_SSL_PTR(3)\fP instead!
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.IP CURLINFO_CONDITION_UNMET
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Whether or not a time conditional was met.
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See \fICURLINFO_CONDITION_UNMET(3)\fP
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.IP CURLINFO_RTSP_SESSION_ID
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RTSP session ID.
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See \fICURLINFO_RTSP_SESSION_ID(3)\fP
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.IP CURLINFO_RTSP_CLIENT_CSEQ
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RTSP CSeq that will next be used.
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See \fICURLINFO_RTSP_CLIENT_CSEQ(3)\fP
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.IP CURLINFO_RTSP_SERVER_CSEQ
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RTSP CSeq that will next be expected.
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See \fICURLINFO_RTSP_SERVER_CSEQ(3)\fP
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.IP CURLINFO_RTSP_CSEQ_RECV
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RTSP CSeq last received.
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See \fICURLINFO_RTSP_CSEQ_RECV(3)\fP
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.SH TIMES
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.nf
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An overview of the six time values available from curl_easy_getinfo()
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curl_easy_perform()
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|--NAMELOOKUP
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|--|--CONNECT
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|--|--|--APPCONNECT
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|--|--|--|--PRETRANSFER
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|--|--|--|--|--STARTTRANSFER
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|--|--|--|--|--|--TOTAL
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|--|--|--|--|--|--REDIRECT
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.fi
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.IP NAMELOOKUP
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\fICURLINFO_NAMELOOKUP_TIME\fP. The time it took from the start until the name
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resolving was completed.
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.IP CONNECT
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\fICURLINFO_CONNECT_TIME\fP. The time it took from the start until the connect
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to the remote host (or proxy) was completed.
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.IP APPCONNECT
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\fICURLINFO_APPCONNECT_TIME\fP. The time it took from the start until the SSL
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connect/handshake with the remote host was completed. (Added in in 7.19.0)
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.IP PRETRANSFER
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\fICURLINFO_PRETRANSFER_TIME\fP. The time it took from the start until the
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file transfer is just about to begin. This includes all pre-transfer commands
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and negotiations that are specific to the particular protocol(s) involved.
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.IP STARTTRANSFER
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\fICURLINFO_STARTTRANSFER_TIME\fP. The time it took from the start until the
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first byte is received by libcurl.
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.IP TOTAL
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\fICURLINFO_TOTAL_TIME\fP. Total time of the previous request.
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.IP REDIRECT
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\fICURLINFO_REDIRECT_TIME\fP. The time it took for all redirection steps
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include name lookup, connect, pretransfer and transfer before final
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transaction was started. So, this is zero if no redirection took place.
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.SH RETURN VALUE
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If the operation was successful, CURLE_OK is returned. Otherwise an
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appropriate error code will be returned.
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.SH "SEE ALSO"
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.BR curl_easy_setopt "(3)"
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