====== Features  -- what can curl do ======
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FEATURES

===== curl tool =====

  - config file support
  - multiple URLs in a single command line
  - range "globbing" support: [0-13], {one,two,three}
  - multiple file upload on a single command line
  - custom maximum transfer rate
  - redirectable stderr

===== libcurl supports =====

  - full URL syntax with no length limit
  - custom maximum download time
  - custom least download speed acceptable
  - custom output result after completion
  - guesses protocol from host name unless specified
  - uses .netrc
  - progress bar/time specs while downloading
  - "standard" proxy environment variables support
  - compiles on win32 (reported builds on 40+ operating systems)
  - selectable network interface for outgoing traffic
  - IPv6 support on unix and Windows
  - persistant connections
  - socks5 support
  - supports user name + password in proxy environment variables
  - operations through proxy "tunnel" (using CONNECT)
  - supports large files (>2GB and >4GB) both upload/download
  - replacable memory functions (malloc, free, realloc, etc)
  - asynchronous name resolving (*6)
  - both a push and a pull style interface

===== HTTP =====

  - HTTP/1.1 compliant (optionally uses 1.0)
  - GET
  - PUT
  - HEAD
  - POST
  - Pipelining
  - multipart formpost (RFC1867-style)
  - authentication: Basic, Digest, NTLM(*9), GSS-Negotiate/Negotiate(*3) and
   SPNEGO (*4) to server and proxy
  - resume (both GET and PUT)
  - follow redirects
  - maximum amount of redirects to follow
  - custom HTTP request
  - cookie get/send fully parsed
  - reads/writes the netscape cookie file format
  - custom headers (replace/remove internally generated headers)
  - custom user-agent string
  - custom referer string
  - range
  - proxy authentication
  - time conditions
  - via http-proxy
  - retrieve file modification date
  - Content-Encoding support for deflate and gzip
  - "Transfer-Encoding: chunked" support for "uploads"

===== HTTPS (*1) =====

  - (all the HTTP features)
  - using client certificates
  - verify server certificate
  - via http-proxy
  - select desired encryption
  - force usage of a specific SSL version (SSLv2(*7), SSLv3 or TLSv1)

===== FTP =====

  - download
  - authentication
  - kerberos4 (*5), kerberos5 (*3)
  - active/passive using PORT, EPRT, PASV or EPSV
  - single file size information (compare to HTTP HEAD)
  - 'type=' URL support
  - dir listing
  - dir listing names-only
  - upload
  - upload append
  - upload via http-proxy as HTTP PUT
  - download resume
  - upload resume
  - custom ftp commands (before and/or after the transfer)
  - simple "range" support
  - via http-proxy
  - all operations can be tunneled through a http-proxy
  - customizable to retrieve file modification date
  - no dir depth limit

===== FTPS (*1) =====

  - implicit ftps:// support that use SSL on both connections
  - explicit "AUTH TSL" and "AUTH SSL" usage to "upgrade" plain ftp://
   connection to use SSL for both or one of the connections

===== SCP (*8) =====

  - both password and public key auth

===== SFTP (*8) =====

  - both password and public key auth
  - with custom commands sent before/after the transfer

===== TFTP =====

  - download / upload

===== TELNET =====

  - connection negotiation
  - custom telnet options
  - stdin/stdout I/O

===== LDAP (*2) =====

  - full LDAP URL support

===== DICT =====

  - extended DICT URL support

===== FILE =====

  - URL support
  - "uploads"
  - resume

===== FOOTNOTES =====

  * 1 = requires OpenSSL, GnuTLS, NSS, yassl or PolarSSL
  * 2 = requires OpenLDAP
  * 3 = requires a GSSAPI-compliant library, such as Heimdal or similar.
  * 4 = requires FBopenssl
  * 5 = requires a krb4 library, such as the MIT one or similar.
  * 6 = requires c-ares
  * 7 = requires OpenSSL or NSS, as GnuTLS only supports SSLv3 and TLSv1
  * 8 = requires libssh2
  * 9 = requires OpenSSL, GnuTLS, NSS or yassl