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- _ _ ____ _
- ___| | | | _ \| |
- / __| | | | |_) | |
- | (__| |_| | _ <| |___
- \___|\___/|_| \_\_____|
-
- Things that could be nice to do in the future
-
- Things to do in project cURL. Please tell us what you think, contribute and
- send us patches that improve things!
-
- All bugs documented in the KNOWN_BUGS document are subject for fixing!
-
- 1. libcurl
- 1.1 Zero-copy interface
- 1.2 More data sharing
- 1.3 struct lifreq
- 1.4 Get IP address
- 1.5 c-ares ipv6
- 1.6 configure-based info in public headers
-
- 2. libcurl - multi interface
- 2.1 More non-blocking
- 2.2 Pause transfers
- 2.3 Remove easy interface internally
- 2.4 Avoid having to remove/readd handles
-
- 3. Documentation
- 3.1 More and better
-
- 4. FTP
- 4.1 PRET
- 4.2 Alter passive/active on failure and retry
- 4.3 Earlier bad letter detection
- 4.4 REST for large files
- 4.5 FTP proxy support
- 4.6 PORT port range
- 4.7 ASCII support
-
- 5. HTTP
- 5.1 Other HTTP versions with CONNECT
- 5.2 Better persistency for HTTP 1.0
- 5.3 support FF3 sqlite cookie files
-
- 6. TELNET
- 6.1 ditch stdin
- 6.2 ditch telnet-specific select
- 6.3 feature negotiation debug data
- 6.4 send data in chunks
-
- 7. SSL
- 7.1 Disable specific versions
- 7.2 Provide mytex locking API
- 7.3 dumpcert
- 7.4 Evaluate SSL patches
- 7.5 Cache OpenSSL contexts
- 7.6 Export session ids
- 7.7 Provide callback for cert verification
- 7.8 Support other SSL libraries
- 7.9 Support SRP on the TLS layer
- 7.10 improve configure --with-ssl
-
- 8. GnuTLS
- 8.1 Make NTLM work without OpenSSL functions
- 8.2 SSL engine stuff
- 8.3 SRP
- 8.4 non-blocking
- 8.5 check connection
-
- 9. Other protocols
- 9.1 ditch ldap-specific select
-
- 10. New protocols
- 10.1 RTSP
- 10.2 RSYNC
- 10.3 RTMP
-
- 11. Client
- 11.1 Content-Disposition
- 11.2 sync
- 11.3 glob posts
- 11.4 prevent file overwriting
- 11.5 ftp wildcard download
- 11.6 simultaneous parallel transfers
- 11.7 provide formpost headers
- 11.8 url-specific options
- 11.9 metalink support
- 11.10 warning when setting an option
-
- 12. Build
- 12.1 roffit
-
- 13. Test suite
- 13.1 SSL tunnel
- 13.2 nicer lacking perl message
- 13.3 more protocols supported
- 13.4 more platforms supported
-
- 14. Next SONAME bump
- 14.1 http-style HEAD output for ftp
- 14.2 combine error codes
- 14.3 extend CURLOPT_SOCKOPTFUNCTION prototype
-
- 15. Next major release
- 15.1 cleanup return codes
- 15.2 remove obsolete defines
- 15.3 size_t
- 15.4 remove several functions
- 15.5 remove CURLOPT_FAILONERROR
- 15.6 remove CURLOPT_DNS_USE_GLOBAL_CACHE
-
-==============================================================================
-
-1. libcurl
-
-1.1 Zero-copy interface
-
- Introduce another callback interface for upload/download that makes one less
- copy of data and thus a faster operation.
- [http://curl.haxx.se/dev/no_copy_callbacks.txt]
-
-1.2 More data sharing
-
- curl_share_* functions already exist and work, and they can be extended to
- share more. For example, enable sharing of the ares channel and the
- connection cache.
-
-1.3 struct lifreq
-
- Use 'struct lifreq' and SIOCGLIFADDR instead of 'struct ifreq' and
- SIOCGIFADDR on newer Solaris versions as they claim the latter is obsolete.
- To support ipv6 interface addresses for network interfaces properly.
-
-1.4 Get IP address
-
- Add the following to curl_easy_getinfo(): GET_HTTP_IP, GET_FTP_IP and
- GET_FTP_DATA_IP. Return a string with the used IP.
-
-1.5 c-ares ipv6
-
- Make libcurl built with c-ares use c-ares' IPv6 abilities. They weren't
- present when we first added c-ares support but they have been added since!
- When this is done and works, we can actually start considering making c-ares
- powered libcurl the default build (which of course would require that we'd
- bundle the c-ares source code in the libcurl source code releases).
-
-1.6 configure-based info in public headers
-
- Make the public headers include the proper system includes based on what was
- present at the time when configure was run. Currently, the sys/select.h
- header is for example included by curl/multi.h only on specific platforms we
- know MUST have it. This is error-prone. We therefore want the header files to
- adapt to configure results. Those results must be stored in a new header and
- they must use a curl name space, i.e not be HAVE_* prefix (as that would risk
- collide with other apps that use libcurl and that runs configure).
-
- Work on this has been started but hasn't been finished, and the initial patch
- and some details are found here:
- http://curl.haxx.se/mail/lib-2006-12/0084.html
-
- The remaining problems to solve involve the platforms that can't run
- configure.
-
-2. libcurl - multi interface
-
-2.1 More non-blocking
-
- Make sure we don't ever loop because of non-blocking sockets return
- EWOULDBLOCK or similar. The GnuTLS connection etc.
-
-2.2 Pause transfers
-
- Make transfers treated more carefully. We need a way to tell libcurl we have
- data to write, as the current system expects us to upload data each time the
- socket is writable and there is no way to say that we want to upload data
- soon just not right now, without that aborting the upload. The opposite
- situation should be possible as well, that we tell libcurl we're ready to
- accept read data. Today libcurl feeds the data as soon as it is available for
- reading, no matter what.
-
-2.3 Remove easy interface internally
-
- Make curl_easy_perform() a wrapper-function that simply creates a multi
- handle, adds the easy handle to it, runs curl_multi_perform() until the
- transfer is done, then detach the easy handle, destroy the multi handle and
- return the easy handle's return code. This will thus make everything
- internally use and assume the multi interface. The select()-loop should use
- curl_multi_socket().
-
-2.4 Avoid having to remove/readd handles
-
- curl_multi_handle_control() - this can control the easy handle (while) added
- to a multi handle in various ways:
-
- o RESTART, unconditionally restart this easy handle's transfer from the
- start, re-init the state
-
- o RESTART_COMPLETED, restart this easy handle's transfer but only if the
- existing transfer has already completed and it is in a "finished state".
-
- o STOP, just stop this transfer and consider it completed
-
- o PAUSE?
-
- o RESUME?
-
-3. Documentation
-
-3.1 More and better
-
- Exactly
-
-4. FTP
-
-4.1 PRET
-
- PRET is a command that primarily "drftpd" supports, which could be useful
- when using libcurl against such a server. It is a non-standard and a rather
- oddly designed command, but...
- http://curl.haxx.se/bug/feature.cgi?id=1729967
-
-4.2 Alter passive/active on failure and retry
-
- When trying to connect passively to a server which only supports active
- connections, libcurl returns CURLE_FTP_WEIRD_PASV_REPLY and closes the
- connection. There could be a way to fallback to an active connection (and
- vice versa). http://curl.haxx.se/bug/feature.cgi?id=1754793
-
-4.3 Earlier bad letter detection
-
- Make the detection of (bad) %0d and %0a codes in FTP url parts earlier in the
- process to avoid doing a resolve and connect in vain.
-
-4.4 REST for large files
-
- REST fix for servers not behaving well on >2GB requests. This should fail if
- the server doesn't set the pointer to the requested index. The tricky
- (impossible?) part is to figure out if the server did the right thing or not.
-
-4.5 FTP proxy support
-
- Support the most common FTP proxies, Philip Newton provided a list allegedly
- from ncftp. This is not a subject without debate, and is probably not really
- suitable for libcurl. http://curl.haxx.se/mail/archive-2003-04/0126.html
-
-4.6 PORT port range
-
- Make CURLOPT_FTPPORT support an additional port number on the IP/if/name,
- like "blabla:[port]" or possibly even "blabla:[portfirst]-[portsecond]".
- http://curl.haxx.se/bug/feature.cgi?id=1505166
-
-4.7 ASCII support
-
- FTP ASCII transfers do not follow RFC959. They don't convert the data
- accordingly.
-
-5. HTTP
-
-5.1 Other HTTP versions with CONNECT
-
- When doing CONNECT to a HTTP proxy, libcurl always uses HTTP/1.0. This has
- never been reported as causing trouble to anyone, but should be considered to
- use the HTTP version the user has chosen.
-
-5.2 Better persistency for HTTP 1.0
-
- "Better" support for persistent connections over HTTP 1.0
- http://curl.haxx.se/bug/feature.cgi?id=1089001
-
-5.3 support FF3 sqlite cookie files
-
- Firefox 3 is changing from its former format to a a sqlite database instead.
- We should consider how (lib)curl can/should support this.
- http://curl.haxx.se/bug/feature.cgi?id=1871388
-
-6. TELNET
-
-6.1 ditch stdin
-
-Reading input (to send to the remote server) on stdin is a crappy solution for
-library purposes. We need to invent a good way for the application to be able
-to provide the data to send.
-
-6.2 ditch telnet-specific select
-
- Move the telnet support's network select() loop go away and merge the code
- into the main transfer loop. Until this is done, the multi interface won't
- work for telnet.
-
-6.3 feature negotiation debug data
-
- Add telnet feature negotiation data to the debug callback as header data.
-
-6.4 send data in chunks
-
- Currently, telnet sends data one byte at a time. This is fine for interactive
- use, but inefficient for any other. Sent data should be sent in larger
- chunks.
-
-7. SSL
-
-7.1 Disable specific versions
-
- Provide an option that allows for disabling specific SSL versions, such as
- SSLv2 http://curl.haxx.se/bug/feature.cgi?id=1767276
-
-7.2 Provide mytex locking API
-
- Provide a libcurl API for setting mutex callbacks in the underlying SSL
- library, so that the same application code can use mutex-locking
- independently of OpenSSL or GnutTLS being used.
-
-7.3 dumpcert
-
- Anton Fedorov's "dumpcert" patch:
- http://curl.haxx.se/mail/lib-2004-03/0088.html
-
-7.4 Evaluate SSL patches
-
- Evaluate/apply Gertjan van Wingerde's SSL patches:
- http://curl.haxx.se/mail/lib-2004-03/0087.html
-
-7.5 Cache OpenSSL contexts
-
- "Look at SSL cafile - quick traces look to me like these are done on every
- request as well, when they should only be necessary once per ssl context (or
- once per handle)". The major improvement we can rather easily do is to make
- sure we don't create and kill a new SSL "context" for every request, but
- instead make one for every connection and re-use that SSL context in the same
- style connections are re-used. It will make us use slightly more memory but
- it will libcurl do less creations and deletions of SSL contexts.
-
-7.6 Export session ids
-
- Add an interface to libcurl that enables "session IDs" to get
- exported/imported. Cris Bailiff said: "OpenSSL has functions which can
- serialise the current SSL state to a buffer of your choice, and recover/reset
- the state from such a buffer at a later date - this is used by mod_ssl for
- apache to implement and SSL session ID cache".
-
-7.7 Provide callback for cert verification
-
- OpenSSL supports a callback for customised verification of the peer
- certificate, but this doesn't seem to be exposed in the libcurl APIs. Could
- it be? There's so much that could be done if it were!
-
-7.8 Support other SSL libraries
-
- Make curl's SSL layer capable of using other free SSL libraries. Such as
- MatrixSSL (http://www.matrixssl.org/).
-
-7.9 Support SRP on the TLS layer
-
- Peter Sylvester's patch for SRP on the TLS layer. Awaits OpenSSL support for
- this, no need to support this in libcurl before there's an OpenSSL release
- that does it.
-
-7.10 improve configure --with-ssl
-
- make the configure --with-ssl option first check for OpenSSL, then GnuTLS,
- then NSS...
-
-8. GnuTLS
-
-8.1 Make NTLM work without OpenSSL functions
-
- Get NTLM working using the functions provided by libgcrypt, since GnuTLS
- already depends on that to function. Not strictly SSL/TLS related, but
- hey... Another option is to get available DES and MD4 source code from the
- cryptopp library. They are fine license-wise, but are C++.
-
-8.2 SSL engine stuff
-
- Is this even possible?
-
-8.3 SRP
-
- Work out a common method with Peter Sylvester's OpenSSL-patch for SRP on the
- TLS to provide name and password. GnuTLS already supports it...
-
-8.4 non-blocking
-
- Fix the connection phase to be non-blocking when multi interface is used
-
-8.5 check connection
-
- Add a way to check if the connection seems to be alive, to correspond to the
- SSL_peak() way we use with OpenSSL.
-
-9. Other protocols
-
-9.1 ditch ldap-specific select
-
- * Look over the implementation. The looping will have to "go away" from the
- lib/ldap.c source file and get moved to the main network code so that the
- multi interface and friends will work for LDAP as well.
-
-9.2 stop TFTP blocking
-
- Stop TFTP from being blocking and doing its own read loop in tftp_do.
-
-10. New protocols
-
-10.1 RTSP
-
- RFC2326 (protocol - very HTTP-like, also contains URL description)
-
-10.2 RSYNC
-
- There's no RFC for protocol nor URI/URL format. An implementation should
- most probably use an existing rsync library, such as librsync.
-
-10.3 RTMP
-
- There exists a patch that claims to introduce this protocol:
- http://osdir.com/ml/gnu.gnash.devel2/2006-11/msg00278.html, further details
- in the feature-request: http://curl.haxx.se/bug/feature.cgi?id=1843469
-
-11. Client
-
-11.1 Content-Disposition
-
- Add option that is similar to -O but that takes the output file name from the
- Content-Disposition: header, and/or uses the local file name used in
- redirections for the cases the server bounces the request further to a
- different file (name): http://curl.haxx.se/bug/feature.cgi?id=1364676
-
-11.2 sync
-
- "curl --sync http://example.com/feed[1-100].rss" or
- "curl --sync http://example.net/{index,calendar,history}.html"
-
- Downloads a range or set of URLs using the remote name, but only if the
- remote file is newer than the local file. A Last-Modified HTTP date header
- should also be used to set the mod date on the downloaded file.
-
-11.3 glob posts
-
- Globbing support for -d and -F, as in 'curl -d "name=foo[0-9]" URL'.
- This is easily scripted though.
-
-11.4 prevent file overwriting
-
- Add an option that prevents cURL from overwriting existing local files. When
- used, and there already is an existing file with the target file name
- (either -O or -o), a number should be appended (and increased if already
- existing). So that index.html becomes first index.html.1 and then
- index.html.2 etc.
-
-11.5 ftp wildcard download
-
- "curl ftp://site.com/*.txt"
-
-11.6 simultaneous parallel transfers
-
- The client could be told to use maximum N simultaneous parallel transfers and
- then just make sure that happens. It should of course not make more than one
- connection to the same remote host. This would require the client to use the
- multi interface. http://curl.haxx.se/bug/feature.cgi?id=1558595
-
-11.7 provide formpost headers
-
- Extending the capabilities of the multipart formposting. How about leaving
- the ';type=foo' syntax as it is and adding an extra tag (headers) which
- works like this: curl -F "coolfiles=@fil1.txt;headers=@fil1.hdr" where
- fil1.hdr contains extra headers like
-
- Content-Type: text/plain; charset=KOI8-R"
- Content-Transfer-Encoding: base64
- X-User-Comment: Please don't use browser specific HTML code
-
- which should overwrite the program reasonable defaults (plain/text,
- 8bit...)
-
-11.8 url-specific options
-
- Provide a way to make options bound to a specific URL among several on the
- command line. Possibly by letting ':' separate options between URLs,
- similar to this:
-
- curl --data foo --url url.com : \
- --url url2.com : \
- --url url3.com --data foo3
-
- (More details: http://curl.haxx.se/mail/archive-2004-07/0133.html)
-
- The example would do a POST-GET-POST combination on a single command line.
-
-11.9 metalink support
-
- Add metalink support to curl (http://www.metalinker.org/). This is most useful
- with simultaneous parallel transfers (11.6) but not necessary.
-
-11.10 warning when setting an option
-
- Display a warning when libcurl returns an error when setting an option.
- This can be useful to tell when support for a particular feature hasn't been
- compiled into the library.
-
-12. Build
-
-12.1 roffit
-
- Consider extending 'roffit' to produce decent ASCII output, and use that
- instead of (g)nroff when building src/hugehelp.c
-
-13. Test suite
-
-13.1 SSL tunnel
-
- Make our own version of stunnel for simple port forwarding to enable HTTPS
- and FTP-SSL tests without the stunnel dependency, and it could allow us to
- provide test tools built with either OpenSSL or GnuTLS
-
-13.2 nicer lacking perl message
-
- If perl wasn't found by the configure script, don't attempt to run the tests
- but explain something nice why it doesn't.
-
-13.3 more protocols supported
-
- Extend the test suite to include more protocols. The telnet could just do ftp
- or http operations (for which we have test servers).
-
-13.4 more platforms supported
-
- Make the test suite work on more platforms. OpenBSD and Mac OS. Remove
- fork()s and it should become even more portable.
-
-14. Next SONAME bump
-
-14.1 http-style HEAD output for ftp
-
- #undef CURL_FTP_HTTPSTYLE_HEAD in lib/ftp.c to remove the HTTP-style headers
- from being output in NOBODY requests over ftp
-
-14.2 combine error codes
-
- Combine some of the error codes to remove duplicates. The original
- numbering should not be changed, and the old identifiers would be
- macroed to the new ones in an CURL_NO_OLDIES section to help with
- backward compatibility.
-
- Candidates for removal and their replacements:
-
- CURLE_FILE_COULDNT_READ_FILE => CURLE_REMOTE_FILE_NOT_FOUND
- CURLE_FTP_COULDNT_RETR_FILE => CURLE_REMOTE_FILE_NOT_FOUND
- CURLE_FTP_COULDNT_USE_REST => CURLE_RANGE_ERROR
- CURLE_FUNCTION_NOT_FOUND => CURLE_FAILED_INIT
- CURLE_LDAP_INVALID_URL => CURLE_URL_MALFORMAT
- CURLE_TFTP_NOSUCHUSER => CURLE_TFTP_ILLEGAL
- CURLE_TFTP_NOTFOUND => CURLE_REMOTE_FILE_NOT_FOUND
- CURLE_TFTP_PERM => CURLE_REMOTE_ACCESS_DENIED
-
-14.3 extend CURLOPT_SOCKOPTFUNCTION prototype
-
- The current prototype only provides 'purpose' that tells what the
- connection/socket is for, but not any protocol or similar. It makes it hard
- for applications to differentiate on TCP vs UDP and even HTTP vs FTP and
- similar.
-
-15. Next major release
-
-15.1 cleanup return codes
-
- curl_easy_cleanup() returns void, but curl_multi_cleanup() returns a
- CURLMcode. These should be changed to be the same.
-
-15.2 remove obsolete defines
-
- remove obsolete defines from curl/curl.h
-
-15.3 size_t
-
- make several functions use size_t instead of int in their APIs
-
-15.4 remove several functions
-
- remove the following functions from the public API:
-
- curl_getenv
-
- curl_mprintf (and variations)
-
- curl_strequal
-
- curl_strnequal
-
- They will instead become curlx_ - alternatives. That makes the curl app
- still capable of building with them from source.
-
-15.5 remove CURLOPT_FAILONERROR
-
- Remove support for CURLOPT_FAILONERROR, it has gotten too kludgy and weird
- internally. Let the app judge success or not for itself.
-
-15.6 remove CURLOPT_DNS_USE_GLOBAL_CACHE
-
- Remove support for a global DNS cache. Anything global is silly, and we
- already offer the share interface for the same functionality but done
- "right".