cURL — это служебная программа командной строки для передачи файлов с синтаксом URL, поддерживающая FTP, FTPS, HTTP, HTTPS, TFTP, SCP, SFTP, Telnet, DICT, FILE и LDAP. cURL поддерживает сертификаты HTTPS, методы HTTP POST, HTTP PUT, загрузку на FTP, Kerberos, загрузку через формы HTTP, прокси, файлы cookie, проверку подлинности "имя пользователя + пароль" (базовую, дайджест, NTLM и Negotiate для HTTP, а также kerberos4 для FTP), возобновление передачи файла, туннелирование через прокси HTTP и много других функций. cURL — это свободное программное обеспечение, распространяемое под лицензией MIT.

Главная цель использования cURL состоит в том, чтобы автоматизировать передачу файлов или последовательность таких операций. Например, это хорошее средство для моделирования действий пользователя в веб-обозревателе.

Libcurl — это библиотека интерфейса API для передачи, которую пользователи могут встроить в свои программы; cURL действует как автономная обёртка для библиотеки libcurl. libcurl используется, чтобы обеспечить возможность передачи URL многочисленным приложениям (как открытым, так и коммерческим).

Для libcurl имеется более 30 различных привязок к языкам программирования.

Материал из Википедии — свободной энциклопедии

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Home_http://curl.haxx.se/
Downloads (~2,1 Mb)_http://curl.haxx.se/d...7.19.0.tar.bz2

Changes:

• libcurl now closes all dead connections whenever you attempt to open a new connection
• libssh2's version number can now be figured out run-time instead of using the build-time fixed number
• CURLOPT_SEEKFUNCTION may now return CURL_SEEKFUNC_CANTSEEK
• curl can now upload with resume even when reading from a pipe
• a build-time configured curl_socklen_t is now used instead of socklen_t

Bugfixes:

• NTLM authentication memory leak on SSPI enabled Windows builds
• fixed the GnuTLS-using code to do correct return code checks
• an alloc-related call in the OpenSSL-using code didn't check the return value
• curl_easy_duphandle() failed to duplicate cookies at times
• missing TELNET timeout support in Windows builds
• missing Curl_read() and write callback result checking in TELNET transfers
• more ciphers enabled in libcurl built to use NSS
• properly return an error code in curl_easy_recv
• Sun compilers specific preprocessor block removed from curlbuild.h.dist
• allow creation of four way fat libcurl Mac OS X Framework
• several memory leaks in libcurl+NSS
• improved the CURLOPT_NOBODY set to 0 confusions
• persistent connections when doing FTP over a HTTP proxy
• --libcurl bogus strings where other data was pointed to
• crash related to FTP and "Re-used connection seems dead, get a new one"
• CURLINFO_APPCONNECT_TIME with the multi interface
• Enhanced upload speeds on Windows
• TFTP problems after a failed transfer to the same host
• improved out of the box TPF compatibility
• HTTP PUT protocol line endings portions mangled from CRLF to CRCRLF
• Rejected SSL session ids are killed properly (for OpenSSL and GnuTLS builds)
• Deal with the TFTP OACK packet
• fixed roff mistakes in man pages
• use SOCKS proxy with the multi interface
• fixed the Curl_getoff_all_pipelines SIGSEGV
• POST, NTLM and following a redirect hang
• libcurl+NSS endless loop on incorrect password for private key
• gzip decompression memory leak
• no_proxy flaw with user name in URL

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Downloads (~2,2 Mb)_http://curl.haxx.se/d...7.19.5.tar.bz2

Changes:

• CURLOPT_FTPPORT (and curl's -P/--ftpport) support port ranges
• Added CURLOPT_SSH_KNOWNHOSTS, CURLOPT_SSH_KEYFUNCTION,
• CURLOPT_SSH_KEYDATA
• CURLOPT_QUOTE, CURLOPT_POSTQUOTE and CURLOPT_PREQUOTE can be told to ignore error responses when used with FTP

Bugfixes:

• crash on bad socket close with FTP
• leaking cookie memory when duplicate domains or paths were used
• build fix for Symbian
• CURLOPT_USERPWD set to NULL clears auth credentials
• libcurl-NSS build fixes
• configure script fixed for VMS
• set Content-Length: with POST and PUT failed with NTLM auth
• allow building libcurl for VxWorks
• curl tool exit codes fixed for VMS
• --no-buffer treated correctly
• djgpp build fix
• configure detection of GnuTLS now based on pkg-config as well
• libcurl-NSS client cert handling segfaults
• curl uploading from stdin/pipes now works in non-blocking way so that it continues
• the downloading even when the read stalls
• ftp credentials are added to the url if needed for http proxies
• curl -o - sends data to stdout using binary mode on windows
• fixed the separators for "array" style string that CURLINFO_CERTINFO returns
• auth problem over several hosts with re-used connection
• improved the support for client certificates in libcurl+NSS
• vfix leak in gtls code
• missing algorithms in libcurl+OpenSSL
• with noproxy set you could still get a proxy if a proxy env was set
• rand seeding on libcurl on windows built with OpenSSL was not thread-safe
• fixed the zero byte inserted in cert name flaw in libcurl+OpenSSL
• don't try SNI with SSLv2 or SSLv3 (OpenSSL and GnuTLS builds)
• libcurl+OpenSSL would wrongly acknowledge a cert if CN matched but subjectAltName didn't
• TFTP upload sent illegal TSIZE packets

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Downloads (~2,3 Mb)_http://curl.haxx.se/d...7.19.6.tar.bz2

Changes:

• -T. is now for non-blocking uploading from stdin
• SYST handling on FTP for OS/400 FTP server cases
• libcurl refuses to read a single HTTP header longer than 100K
• added the --crlfile option to curl

Bugfixes:

• The windows makefiles work again
• libcurl-NSS acknowledges verifyhost
• SIGSEGV when pipelined pipe unexpectedly breaks
• data corruption issue with re-connected transfers
• use after free if we're completed but easy_conn not NULL (pipelined)
• missing strdup() return code check
• CURLOPT_PROXY_TRANSFER_MODE could pass along wrong syntax
• configure --with-gnutls=PATH fixed
• ftp response reader bug on failed control connections
• improved NSS error message on failed host name verifications
• ftp NOBODY on re-used connection hang
• configure uses pkg-config for cross-compiles as well
• improved NSS detection in configure
• cookie expiry date at 1970-jan-1 00:00:00
• libcurl-OpenSSL failed to verify some certs with Subject Alternative Name
• libcurl-OpenSSL can load CRL files with more than one certificate inside
• received cookies without explicit path got saved wrong if the URL had a query part
• don't shrink SO_SNDBUF on windows for those who have it set large already
• connect next bug
• invalid file name characters handling on Windows
• double close() on the primary socket with libcurl-NSS
• GSS negotiate infinite loop on bad credentials
• memory leak in SCP/SFTP connections
• use pkg-config to find out libssh2 installation details in configure
• unparsable cookie expire dates make cookies get treated as session coookies
• POST with Digest authentication and "Transfer-Encoding: chunked"
• SCP connection re-use with wrong auth
• CURLINFO_CONTENT_LENGTH_DOWNLOAD for 0 bytes transfers
• CURLINFO_SIZE_DOWNLOAD for ldap transfers (-w size_download)

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Downloads (~2,3 Mb)_http://curl.haxx.se/d...7.19.7.tar.bz2

Changes:

• support SSL_FILETYPE_ENGINE for client certificate
• curl-config can now show the arguments used when building curl
• non-blocking TFTP
• send Expect: 100-continue for POSTs with unknown sizes
• added support for IMAP(S), POP3(S), SMTP(S) and RTSP
• added new curl_easy_setopt() options for SMTP and RTSP
• added --mail-from and --mail-rcpt for SMTP
• VMS build system enhancements
• added support for the PRET ftp command
• curl supports --ssl and --ssl-reqd
• added -J/--remote-header-name for using server-provided filename with -O
• enhanced asynchronous DNS lookups
• symbol CURL_FORMAT_OFF_T is obsoleted

Bugfixes:

• progress meter percentage and transfer time estimates fixes
• portability enhancement for OS's without orthogonal directory tree structure
• progress meter/callback during FTP connection
• DNS cache timeout while transfer in progress
• compilation when configured --with-gssapi having GNU GSS installed
• SSL connection reused with mismatched protection level
• configure --with-nss is set but not "yes"
• don't store LDFLAGS in pkg-config file
• never-pruned DNS cached entries
• HTTP proxy tunnel re-used connection even if tunnel got disabled
• SSL lib post-close write
• curl failed to report write errors for tiny failed downloads
• TFTP BLKSIZE
• Expect: 100-continue handling when set by the application
• multi interface with OpenSSL read already freed memory when closing down
• --retry didn't do right for FTP transient errors
• some *_proxy environment variables didn't function
• libcurl-OpenSSL engine cleanup
• header include fix for FreeBSD versions before v8
• fragment part of URLs are no longer sent to the server
• progress callback called repeatedly with c-ares for resolving
• OpenSSL session id ref count leak
• progress callback called repeatedly during slow connects
• curl_multi_fdset() would return -1 too often during SCP/SFTP transfers
• FTP file size checks with ASCII transfers
• HTTP Cookie: headers sort cookies based on specified path lengths
• CURLM_CALL_MULTI_PERFORM fix for multi socket timeout calls
• libcurl data callback excessive length

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Downloads (~2,0 Mb)_http://curl.haxx.se/d...7.20.0.tar.bz2

Changes:

* The 'ares' subtree has been removed from the source repository
* smoother rate limiting
* allow user+password in the URL for all protocols
* POP3: Get message listing if no mailbox in URL

Bugfixes:

* VMS builder bad behavior when used in a batch job
* multiple recepients with SMTP
* fixed the CURL_FORMAT_* defines when building with cmake
* missing quote in libcurl.m4
* SMTP: now waits for 250 after the DATA transfer
* SMTP: use angle brackets in RCPT TO
* curl --trace-time not using local time
* off-by-one in the chunked encoding trailer parser
* superfluous blocking for OpenSSL-based SSL connects and multi interface
* TFTP upload
* FTP timeouts after file transferred completely
* skip poll() on Interix
* CURLOPT_CERTINFO memory leak
* sub-second timeouts improvements
* configure fixes for GSSAPI
* threaded resolver double free when closing curl handle
* configure fixes for building with the clang compiler
* easy interix rate limiting logic
* curl_multi_remove_handle() caused use after free
* TFTP improved error codes
* TFTP fixed TSIZE handling for uploads
* SSL possible double free when reusing curl handle
* alarm()-based DNS timeout bug
* re-used FTP connection multi interface crash
* chunked-encoding with Content-Length: header problem
* multi interface HTTP POST over a proxy using PROXYTUNNEL
* RTSP GET_PARAMETER
* timeout after last data chunk was handled
* SFTP download hang
* FTP quote commands prefixed with '*' now can fail without aborting

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Downloads (~2,0 Mb)_http://curl.haxx.se/d...7.20.1.tar.bz2

Changes:

* added the --proto and -proto-redir options
* new configure option --enable-threaded-resolver
* improve TELNET ability with libcurl
* added support for PolarSSL
* added support for FTP wildcard matching and downloads
* added support for RTMP
* introducing new LDAP code for new enough OpenLDAP
* OpenLDAP support enabled for cygwin builds
* added CURLINFO_PRIMARY_PORT, CURLINFO_LOCAL_IP and CURLINFO_LOCAL_PORT

Bugfixes:

* prevent needless reverse name lookups
* detect GSS on ancient Linux distros
* GnuTLS: EOF caused error when it wasn't
* GnuTLS: SSL handshake phase is non-blocking
* -J/--remote-header-name strips CRLF
* MSVC makefiles now use ws2_32.lib instead of wsock32.lib
* -O crash on windows
* SSL handshake timeout underflow in libcurl-NSS
* multi interface missed storing connection time
* broken CRL support in libcurl-NSS
* ignore response-body on redirect even if compressed
* OpenSSL handshake state-machine for multi interface
* TFTP timeout option sent correctly
* TFTP block id wrap
* curl_multi_socket_action() timeout handles inaccuracy in timers better
* SCP/SFTP failure to respect the timeout
* spurious SSL connection aborts with OpenSSL

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Downloads (~2,0 Mb)_http://curl.haxx.se/d...7.21.0.tar.bz2

Changes:

* maketgz: produce CHANGES automatically
* added support for NTLM authentication when compiled with NSS
* build: Enable configure --enable-werror
* curl-config: --built-shared returns shared info

Bugfixes:

* configure: spell --disable-threaded-resolver correctly
* multi: call the progress callback in all states
* multi: unmark handle as used when no longer head of pipeline
* sendrecv: treat all negative values from send/recv as errors
* ftp-wildcard: avoid tight loop when used without any pattern
* multi_socket: re-use of same socket without notifying app
* ftp wildcard: FTP LIST parser FIX
* urlglobbing backslash escaping bug
* build: add enable IPV6 option for the VC makefiles
* multi: CURLINFO_LASTSOCKET doesn't work after remove_handle
* --libcurl: use *_LARGE options with typecasted constants
* --libcurl: hide setopt() calls setting default options
* curl: avoid setting libcurl options to its default
* --libcurl: list the tricky options instead of using [REMARK]
* http: don't enable chunked during authentication negotiations
* upload: warn users trying to upload from stdin with anyauth
* configure: allow environments variable to override internals
* threaded resolver: fix timeout issue
* multi: fix condition that remove timers before trigger
* examples: add curl_multi_timeout
* --retry: access violation with URL part sets continued
* ssh: Fix compile error on 64-bit systems.
* remote-header-name: chop filename at next semicolon
* ftp: response timeout bug in "quote" sending
* CUSTOMREQUEST: shouldn't be disabled when HTTP is disabled
* Watcom makefiles overhaul.
* NTLM tests: boost coverage by forcing the hostname
* multi: fix FTPS connecting the data connection with OpenSSL
* retry: consider retrying even if -f is used
* fix SOCKS problem when using multi interface
* typecheck-gcc: add checks for recently added options
* SCP: send large files properly with new enough libssh2
* multi_socket: set timeout for 100-continue
* ";type=" URL suffix over HTTP proxy
* acknowledge progress callback error returns during connect
* Watcom makefile fixes
* runtests: clear old setenv remainders before test

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Downloads (~2,0 Mb)_http://curl.haxx.se/d...7.21.1.tar.bz2

Changes:

* curl -T: ignore file size of special files
* Added GOPHER protocol support
* Added mk-ca-bundle.vbs script
* c-ares build now requires c-ares >= 1.6.0

Bugfixes:

* --remote-header-name security vulnerability fixed
* multi: support the timeouts correctly, fixes known bug #62
* multi: use timeouts properly for MAX_RECV/SEND_SPEED
* negotiation: Wrong proxy authorization
* multi: avoid sending multiple complete messages
* cmdline: make -F type= accept ;charset=
* RESUME_FROM: clarify what ftp uploads do
* http: handle trailer headers in all chunked responses
* Curl_is_connected: use correct errno
* Added SSPI build to Watcom makefile
* progress: callback for POSTs less than MAX_INITIAL_POST_SIZE
* linking problem on Fedora 13
* Link curl and the test apps with -lrt explicitly when necessary
* chunky parser: only rewind stream internally if needed
* remote-header-name: don't output filename when NULL
* Curl_timeleft: avoid returning "no timeout" by mistake
* timeout: use the correct start value as offset
* FTP: fix wrong timeout trigger
* buildconf got better output on failures
* rtsp: avoid SIGSEGV on malformed header
* LDAP: Support for tunnelling queries through HTTP proxy
* configure's --enable-werror had a bashism
* test565: Don't hardcode IP:PORT
* configure: check for gcrypt if using GnuTLS
* configure: don't enable RTMP if the lib detect fails
* curl_easy_duphandle: clone the c-ares handle correctly
* MacOSX-Framework: updates for Snowleopard
* support URL containing colon without trailing port number
* parsedate: allow time specified without seconds
* curl_easy_escape: don't escape "unreserved" characters
* SFTP: avoid downloading negative sizes
* Lots of GSS/KRB FTP fixes
* TFTP: Work around tftpd-hpa upload bug
* libcurl.m4: several fixes
* HTTP: remove special case for 416
* examples: use example.com in example URLs
* globbing: fix crash on unballanced open brace
* cmake: build fixed

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Downloads (~2,0 Mb)_http://curl.haxx.se/d...7.21.2.tar.bz2

Changes:

Added --noconfigure switch to testcurl.pl
Added --xattr option
Added CURLOPT_RESOLVE and --resolve
Added CURLAUTH_ONLY
Added version-check.pl to the examples dir

Bugfixes:

check for libcurl features for some command line options
Curl_setopt: disallow CURLOPT_USE_SSL without SSL support
http_chunks: remove debug output
URL-parsing: consider ? a divider
SSH: avoid using the libssh2_ prefix
SSH: use libssh2_session_handshake() to work on win64
ftp: prevent server from hanging on closed data connection when stopping a transfer before the end of the full transfer (ranges)
LDAP: detect non-binary attributes properly
ftp: treat server's response 421 as CURLE_OPERATION_TIMEDOUT
gnutls->handshake: improved timeout handling
security: Pass the right parameter to init
krb5: Use GSS_ERROR to check for error
TFTP: resend the correct data
configure: fix autoconf 2.68 warning: no AC_LANG_SOURCE call detected
GnuTLS: now detects socket errors on Windows
symbols-in-versions: updated en masse
added a couple examples that were missing from the tar ball
Curl_send/recv_plain: return errno on failure
Curl_wait_for_resolv (for c-ares): correct timeout
ossl_connect_common: detect connection re-use
configure: Prevent link errors with --librtmp
openldap: use remote port in URL passed to ldap_init_fd()
url: provide dead_connection flag in Curl_handler::disconnect
lots of compiler warning fixes
ssh: fix a download resume point calculation
fix getinfo CURLINFO_LOCAL* for reused connections
multi: the returned running handles conuter could turn negative
multi: only ever consider pipelining for connections doing HTTP(S)

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Download (~2,1 Mb)_http://curl.haxx.se/d...7.21.3.tar.bz2