253 lines
11 KiB
Plaintext
253 lines
11 KiB
Plaintext
_ _ ____ _
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/ __| | | | |_) | |
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| (__| |_| | _ <| |___
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\___|\___/|_| \_\_____|
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TODO
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Things to do in project cURL. Please tell us what you think, contribute and
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send us patches that improve things! Also check the http://curl.haxx.se/dev
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web section for various technical development notes.
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All bugs documented in the KNOWN_BUGS document are subject for fixing!
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LIBCURL
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* Introduce an interface to libcurl that allows applications to easier get to
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know what cookies that are received. Pushing interface that calls a
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callback on each received cookie? Querying interface that asks about
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existing cookies? We probably need both. Enable applications to modify
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existing cookies as well. http://curl.haxx.se/dev/COOKIES
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* Introduce another callback interface for upload/download that makes one
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less copy of data and thus a faster operation.
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[http://curl.haxx.se/dev/no_copy_callbacks.txt]
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* More data sharing. curl_share_* functions already exist and work, and they
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can be extended to share more. For example, enable sharing of the ares
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channel.
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* Introduce a new error code indicating authentication problems (for proxy
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CONNECT error 407 for example). This cannot be an error code, we must not
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return informational stuff as errors, consider a new info returned by
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curl_easy_getinfo() #845941
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* Use 'struct lifreq' and SIOCGLIFADDR instead of 'struct ifreq' and
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SIOCGIFADDR on newer Solaris versions as they claim the latter is obsolete.
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LIBCURL - multi interface
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* Add curl_multi_timeout() to make libcurl's ares-functionality better.
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* Make sure we don't ever loop because of non-blocking sockets return
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EWOULDBLOCK or similar. This FTP command sending, the SSL connection etc.
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* Make transfers treated more carefully. We need a way to tell libcurl we
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have data to write, as the current system expects us to upload data each
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time the socket is writable and there is no way to say that we want to
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upload data soon just not right now, without that aborting the upload. The
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opposite situation should be possible as well, that we tell libcurl we're
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ready to accept read data. Today libcurl feeds the data as soon as it is
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available for reading, no matter what.
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DOCUMENTATION
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* More and better
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FTP
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* "PASV IP override" - When an FTPS host is behind a NAT firewall, passive
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mode fails. The PASV response from the host ["227 PASV Entering passive
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mode (_ip_address_, _port_)."] contains the private network IP address of
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the host, which since it is encrypted, cannot be modified by the firewall
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to the public IP address. What is needed is a cURL option to override the
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IP address passed by the host "227 PASV" response. Requested by Ed
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Hingsbergen
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* Support GSS/Kerberos 5 for ftp file transfer. This will allow user
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authentication and file encryption. Possible libraries and example clients
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are available from MIT or Heimdal. Requsted by Markus Moeller.
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* Optimize the way libcurl uses CWD on each new request over a persistent
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connection (on FTP) even if it doesn't have to.
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* REST fix for servers not behaving well on >2GB requests. This should fail
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if the server doesn't set the pointer to the requested index. The tricky
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part is to figure out if the server did the right thing or not.
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* Support the most common FTP proxies, Philip Newton provided a list
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allegedly from ncftp:
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http://curl.haxx.se/mail/archive-2003-04/0126.html
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* Make CURLOPT_FTPPORT support an additional port number on the IP/if/name,
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like "blabla:[port]" or possibly even "blabla:[portfirst]-[portsecond]".
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* FTP ASCII transfers do not follow RFC959. They don't convert the data
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accordingly.
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* Since USERPWD always override the user and password specified in URLs, we
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might need another way to specify user+password for anonymous ftp logins.
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* The FTP code should get a way of returning errors that is known to still
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have the control connection alive and sound. Currently, a returned error
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from within ftp-functions does not tell if the control connection is still
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OK to use or not. This causes libcurl to fail to re-use connections
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slightly too often.
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HTTP
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* Pipelining. Sending multiple requests before the previous one(s) are done.
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This could possibly be implemented using the multi interface to queue
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requests and the response data.
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TELNET
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* Reading input (to send to the remote server) on stdin is a crappy solution
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for library purposes. We need to invent a good way for the application to
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be able to provide the data to send.
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* Move the telnet support's network select() loop go away and merge the code
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into the main transfer loop. Until this is done, the multi interface won't
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work for telnet.
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SSL
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* Anton Fedorov's "dumpcert" patch:
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http://curl.haxx.se/mail/lib-2004-03/0088.html
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* Evaluate/apply Gertjan van Wingerde's SSL patches:
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http://curl.haxx.se/mail/lib-2004-03/0087.html
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* "Look at SSL cafile - quick traces look to me like these are done on every
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request as well, when they should only be necessary once per ssl context
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(or once per handle)". The major improvement we can rather easily do is to
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make sure we don't create and kill a new SSL "context" for every request,
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but instead make one for every connection and re-use that SSL context in
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the same style connections are re-used. It will make us use slightly more
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memory but it will libcurl do less creations and deletions of SSL contexts.
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* Add an interface to libcurl that enables "session IDs" to get
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exported/imported. Cris Bailiff said: "OpenSSL has functions which can
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serialise the current SSL state to a buffer of your choice, and
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recover/reset the state from such a buffer at a later date - this is used
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by mod_ssl for apache to implement and SSL session ID cache".
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* OpenSSL supports a callback for customised verification of the peer
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certificate, but this doesn't seem to be exposed in the libcurl APIs. Could
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it be? There's so much that could be done if it were! (brought by Chris
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Clark)
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* Make curl's SSL layer option capable of using other free SSL libraries.
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Such as the Mozilla Security Services
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(http://www.mozilla.org/projects/security/pki/nss/) and GnuTLS
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(http://www.gnu.org/software/gnutls/) This subject has been brought up
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again recently since GPL-licensed applications that link with libcurl MAY
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NOT distribute binaries that use OpenSSL without adding an exception clause
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to the GPL license. See the LICENSE-MIXING document and this:
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http://www.gnome.org/~markmc/openssl-and-the-gpl.html
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LDAP
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* Look over the implementation. The looping will have to "go away" from the
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lib/ldap.c source file and get moved to the main network code so that the
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multi interface and friends will work for LDAP as well.
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CLIENT
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* "curl --sync http://example.com/feed[1-100].rss" or
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"curl --sync http://example.net/{index,calendar,history}.html"
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Downloads a range or set of URLs using the remote name, but only if the
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remote file is newer than the local file. A Last-Modified HTTP date header
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should also be used to set the mod date on the downloaded file.
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(idea from "Brianiac")
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* Globbing support for -d and -F, as in 'curl -d "name=foo[0-9]" URL'.
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Requested by Dane Jensen and others. This is easily scripted though.
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* Add an option that prevents cURL from overwiting existing local files. When
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used, and there already is an existing file with the target file name
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(either -O or -o), a number should be appended (and increased if already
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existing). So that index.html becomes first index.html.1 and then
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index.html.2 etc. Jeff Pohlmeyer suggested.
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* "curl ftp://site.com/*.txt"
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* The client could be told to use maximum N simultaneous transfers and then
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just make sure that happens. It should of course not make more than one
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connection to the same remote host. This would require the client to use
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the multi interface.
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* Extending the capabilities of the multipart formposting. How about leaving
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the ';type=foo' syntax as it is and adding an extra tag (headers) which
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works like this: curl -F "coolfiles=@fil1.txt;headers=@fil1.hdr" where
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fil1.hdr contains extra headers like
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Content-Type: text/plain; charset=KOI8-R"
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Content-Transfer-Encoding: base64
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X-User-Comment: Please don't use browser specific HTML code
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which should overwrite the program reasonable defaults (plain/text,
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8bit...) (Idea brough to us by kromJx)
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* ability to specify the classic computing suffixes on the range
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specifications. For example, to download the first 500 Kilobytes of a file,
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be able to specify the following for the -r option: "-r 0-500K" or for the
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first 2 Megabytes of a file: "-r 0-2M". (Mark Smith suggested)
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* --data-encode that URL encodes the data before posting
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http://curl.haxx.se/mail/archive-2003-11/0091.html (Kevin Roth suggested)
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* Provide a way to make options bound to a specific URL among several on the
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command line. Possibly by letting ':' separate options between URLs,
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similar to this:
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curl --data foo --url url.com : \
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--url url2.com : \
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--url url3.com --data foo3
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(More details: http://curl.haxx.se/mail/archive-2004-07/0133.html)
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The example would do a POST-GET-POST combination on a single command line.
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BUILD
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* Consider extending 'roffit' to produce decent ASCII output, and use that
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instead of (g)nroff when building src/hugehelp.c
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TEST SUITE
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* Make the test servers able to serve multiple running test suites. Like if
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two users run 'make test' at once.
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* Make runtests.pl capable of changing port numbers for the servers. This was
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the intention from the start, but in practise it is now hard.
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* If perl wasn't found by the configure script, don't attempt to run the
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tests but explain something nice why it doesn't.
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* Extend the test suite to include more protocols. The telnet could just do
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ftp or http operations (for which we have test servers).
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* Make the test suite work on more platforms. OpenBSD and Mac OS. Remove
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fork()s and it should become even more portable.
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NEXT MAJOR RELEASE
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* curl_easy_cleanup() returns void, but curl_multi_cleanup() returns a
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CURLMcode. These should be changed to be the same.
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* remove obsolete defines from curl/curl.h
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* make several functions use size_t instead of int in their APIs
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* remove the following functions from the public API:
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curl_getenv
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curl_mprintf (and variations)
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curl_strequal
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curl_strnequal
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They will instead become curlx_ - alternatives. That makes the curl app
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still capable of building with them from source.
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