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https://github.com/moparisthebest/curl
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and allow reuse by multiple protocols. Several unused error codes were removed. In all cases, macros were added to preserve source (and binary) compatibility with the old names. These macros are subject to removal at a future date, but probably not before 2009. An application can be tested to see if it is using any obsolete code by compiling it with the CURL_NO_OLDIES macro defined. Documented some newer error codes in libcurl-error(3)
328 lines
14 KiB
Plaintext
328 lines
14 KiB
Plaintext
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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 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 and the connection cache.
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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() http://curl.haxx.se/bug/view.cgi?id=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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To support ipv6 interface addresses properly.
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* Add the following to curl_easy_getinfo(): GET_HTTP_IP, GET_FTP_IP and
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GET_FTP_DATA_IP. Return a string with the used IP. Suggested by Alan.
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* Add option that changes the interval in which the progress callback is
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called at most.
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* Make libcurl built with c-ares use c-ares' IPv6 abilities. They weren't
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present when we first added c-ares support but they have been added since!
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When this is done and works, we can actually start considering making c-ares
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powered libcurl the default build (which of course would require that we'd
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bundle the c-ares source code in the libcurl source code releases).
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* Make the curl/*.h headers include the proper system includes based on what
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was present at the time when configure was run. Currently, the sys/select.h
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header is for example included by curl/multi.h only on specific platforms
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we know MUST have it. This is error-prone. We therefore want the header
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files to adapt to configure results. Those results must be stored in a new
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header and they must use a curl name space, i.e not be HAVE_* prefix (as
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that would risk collide with other apps that use libcurl and that runs
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configure).
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Work on this has been started but hasn't been finished, and the initial
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patch and some details are found here:
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http://curl.haxx.se/mail/lib-2006-12/0084.html
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LIBCURL - multi interface
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* Make sure we don't ever loop because of non-blocking sockets return
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EWOULDBLOCK or similar. The GnuTLS 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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* Make curl_easy_perform() a wrapper-function that simply creates a multi
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handle, adds the easy handle to it, runs curl_multi_perform() until the
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transfer is done, then detach the easy handle, destroy the multi handle and
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return the easy handle's return code. This will thus make everything
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internally use and assume the multi interface. The select()-loop should use
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curl_multi_socket().
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* curl_multi_handle_control() - this can control the easy handle (while)
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added to a multi handle in various ways:
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o RESTART, unconditionally restart this easy handle's transfer from the
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start, re-init the state
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o RESTART_COMPLETED, restart this easy handle's transfer but only if the
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existing transfer has already completed and it is in a "finished state".
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o STOP, just stop this transfer and consider it completed
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o PAUSE?
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o RESUME?
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DOCUMENTATION
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* More and better
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FTP
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* Make the detection of (bad) %0d and %0a codes in FTP url parts earlier in
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the process to avoid doing a resolve and connect in vain.
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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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(impossible?) part is to figure out if the server did the right thing or
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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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* When doing CONNECT to a HTTP proxy, libcurl always uses HTTP/1.0. This has
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never been reported as causing trouble to anyone, but should be considered
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to use the HTTP version the user has chosen.
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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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* Provide a libcurl API for setting mutex callbacks in the underlying SSL
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library, so that the same application code can use mutex-locking
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independently of OpenSSL or GnutTLS being used.
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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 capable of using other free SSL libraries. Such as
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MatrixSSL (http://www.matrixssl.org/).
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* Peter Sylvester's patch for SRP on the TLS layer.
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Awaits OpenSSL support for this, no need to support this in libcurl before
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there's an OpenSSL release that does it.
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* make the configure --with-ssl option first check for OpenSSL, then GnuTLS,
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then NSS...
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GnuTLS
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* Get NTLM working using the functions provided by libgcrypt, since GnuTLS
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already depends on that to function. Not strictly SSL/TLS related, but
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hey... Another option is to get available DES and MD4 source code from the
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cryptopp library. They are fine license-wise, but are C++.
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* SSL engine stuff?
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* Work out a common method with Peter Sylvester's OpenSSL-patch for SRP
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on the TLS to provide name and password
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* Fix the connection phase to be non-blocking when multi interface is used
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* Add a way to check if the connection seems to be alive, to correspond to
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the SSL_peak() way we use with OpenSSL.
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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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NEW PROTOCOLS
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* RTSP - RFC2326 (protocol - very HTTP-like, also contains URL description)
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* RSYNC (no RFCs for protocol nor URI/URL format). An implementation should
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most probably use an existing rsync library, such as librsync.
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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 overwriting 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 our own version of stunnel for simple port forwarding to enable HTTPS
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and FTP-SSL tests without the stunnel dependency, and it could allow us to
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provide test tools built with either OpenSSL or GnuTLS
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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 soname bump
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* #undef CURL_FTP_HTTPSTYLE_HEAD in lib/ftp.c to remove the HTTP-style headers
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from being output in NOBODY requests over ftp
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* Combine some of the error codes to remove duplicates. The original
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numbering should not be changed, and the old identifiers would be
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macroed to the new ones in an CURL_NO_OLDIES section to help with
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backward compatibility.
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Candidates for removal and their replacements:
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CURLE_FILE_COULDNT_READ_FILE => CURLE_REMOTE_FILE_NOT_FOUND
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CURLE_FTP_COULDNT_RETR_FILE => CURLE_REMOTE_FILE_NOT_FOUND
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CURLE_FTP_COULDNT_USE_REST => CURLE_RANGE_ERROR
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CURLE_FUNCTION_NOT_FOUND => CURLE_FAILED_INIT
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CURLE_LDAP_INVALID_URL => CURLE_URL_MALFORMAT
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CURLE_TFTP_NOSUCHUSER => CURLE_TFTP_ILLEGAL
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CURLE_TFTP_NOTFOUND => CURLE_REMOTE_FILE_NOT_FOUND
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CURLE_TFTP_PERM => CURLE_REMOTE_ACCESS_DENIED
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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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* Remove support for CURLOPT_FAILONERROR, it has gotten too kludgy and weird
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internally. Let the app judge success or not for itself.
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