mirror of
https://github.com/curl/curl.git
synced 2024-12-21 06:50:10 +08:00
0238a9b0d7
Since #13754 Pointed-out-by: Slaven Rezić Bug: https://github.com/curl/curl/issues/13754#issuecomment-2268374427 Closes #14392
698 lines
23 KiB
Plaintext
698 lines
23 KiB
Plaintext
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/ __| | | | |_) | |
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| (__| |_| | _ <| |___
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\___|\___/|_| \_\_____|
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Known Bugs
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These are problems and bugs known to exist at the time of this release. Feel
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free to join in and help us correct one or more of these. Also be sure to
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check the changelog of the current development status, as one or more of these
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problems may have been fixed or changed somewhat since this was written.
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1. HTTP
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1.2 hyper is slow
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1.5 Expect-100 meets 417
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2. TLS
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2.1 IMAPS connection fails with rustls error
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2.3 Unable to use PKCS12 certificate with Secure Transport
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2.4 Secure Transport does not import PKCS#12 client certificates without a password
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2.5 Client cert handling with Issuer DN differs between backends
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2.7 Client cert (MTLS) issues with Schannel
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2.11 Schannel TLS 1.2 handshake bug in old Windows versions
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2.13 CURLOPT_CERTINFO results in CURLE_OUT_OF_MEMORY with Schannel
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3. Email protocols
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3.1 IMAP SEARCH ALL truncated response
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3.2 No disconnect command
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3.3 POP3 expects "CRLF.CRLF" eob for some single-line responses
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3.4 AUTH PLAIN for SMTP is not working on all servers
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3.5 APOP authentication fails on POP3
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3.6 POP3 issue when reading small chunks
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4. Command line
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4.1 -T /dev/stdin may upload with an incorrect content length
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4.2 -T - always uploads chunked
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5. Build and portability issues
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5.1 OS400 port requires deprecated IBM library
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5.2 curl-config --libs contains private details
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5.3 building for old macOS fails with gcc
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5.5 cannot handle Unicode arguments in non-Unicode builds on Windows
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5.6 Cygwin: make install installs curl-config.1 twice
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5.11 configure --with-gssapi with Heimdal is ignored on macOS
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5.12 flaky CI builds
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5.13 long paths are not fully supported on Windows
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5.14 Windows Unicode builds use homedir in current locale
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5.15 Unicode on Windows
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6. Authentication
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6.1 NTLM authentication and Unicode
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6.2 MIT Kerberos for Windows build
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6.3 NTLM in system context uses wrong name
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6.5 NTLM does not support password with § character
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6.6 libcurl can fail to try alternatives with --proxy-any
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6.7 Do not clear digest for single realm
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6.9 SHA-256 digest not supported in Windows SSPI builds
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6.10 curl never completes Negotiate over HTTP
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6.11 Negotiate on Windows fails
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6.12 cannot use Secure Transport with Crypto Token Kit
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6.13 Negotiate against Hadoop HDFS
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7. FTP
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7.1 FTP upload fails if remembered directory is deleted
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7.2 Implicit FTPS upload timeout
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7.3 FTP with NOBODY and FAILONERROR
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7.4 FTP with ACCT
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7.12 FTPS directory listing hangs on Windows with Schannel
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9. SFTP and SCP
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9.1 SFTP does not do CURLOPT_POSTQUOTE correct
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9.2 wolfssh: publickey auth does not work
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9.3 Remote recursive folder creation with SFTP
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9.4 libssh blocking and infinite loop problem
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9.5 Cygwin: "WARNING: UNPROTECTED PRIVATE KEY FILE!"
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10. SOCKS
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10.3 FTPS over SOCKS
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11. Internals
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11.1 gssapi library name + version is missing in curl_version_info()
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11.2 error buffer not set if connection to multiple addresses fails
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11.3 TFTP tests fail on OpenBSD
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11.4 HTTP test server 'connection-monitor' problems
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11.5 Connection information when using TCP Fast Open
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11.6 test cases sometimes timeout
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11.7 AppleIDN test failures
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11.8 WinIDN test failures
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12. LDAP
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12.1 OpenLDAP hangs after returning results
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12.2 LDAP on Windows does authentication wrong?
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12.3 LDAP on Windows does not work
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12.4 LDAPS requests to ActiveDirectory server hang
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13. TCP/IP
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13.2 Trying local ports fails on Windows
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15. CMake
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15.1 cmake outputs: no version information available
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15.2 support build with GnuTLS
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15.3 unusable tool_hugehelp.c with MinGW
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15.6 uses -lpthread instead of Threads::Threads
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15.7 generated .pc file contains strange entries
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15.11 ExternalProject_Add does not set CURL_CA_PATH
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15.13 CMake build with MIT Kerberos does not work
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16. aws-sigv4
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16.2 aws-sigv4 does not handle multipart/form-data correctly
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16.3 aws-sigv4 has problems with particular URLs
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16.6 aws-sigv4 does not behave well with AWS VPC Lattice
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17. HTTP/2
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17.1 HTTP/2 prior knowledge over proxy
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17.2 HTTP/2 frames while in the connection pool kill reuse
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17.3 ENHANCE_YOUR_CALM causes infinite retries
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17.4 HTTP/2 + TLS spends a lot of time in recv
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18. HTTP/3
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18.1 connection migration does not work
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18.2 quiche: QUIC connection is draining
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19. RTSP
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19.1 Some methods do not support response bodies
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==============================================================================
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1. HTTP
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1.2 hyper is slow
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When curl is built to use hyper for HTTP, it is unnecessary slow.
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https://github.com/curl/curl/issues/11203
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1.5 Expect-100 meets 417
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If an upload using Expect: 100-continue receives an HTTP 417 response, it
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ought to be automatically resent without the Expect:. A workaround is for
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the client application to redo the transfer after disabling Expect:.
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https://curl.se/mail/archive-2008-02/0043.html
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2. TLS
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2.1 IMAPS connection fails with rustls error
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https://github.com/curl/curl/issues/10457
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2.3 Unable to use PKCS12 certificate with Secure Transport
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See https://github.com/curl/curl/issues/5403
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2.4 Secure Transport does not import PKCS#12 client certificates without a password
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libcurl calls SecPKCS12Import with the PKCS#12 client certificate, but that
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function rejects certificates that do not have a password.
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https://github.com/curl/curl/issues/1308
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2.5 Client cert handling with Issuer DN differs between backends
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When the specified client certificate does not match any of the
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server-specified DNs, the OpenSSL and GnuTLS backends behave differently.
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The github discussion may contain a solution.
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See https://github.com/curl/curl/issues/1411
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2.7 Client cert (MTLS) issues with Schannel
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See https://github.com/curl/curl/issues/3145
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2.11 Schannel TLS 1.2 handshake bug in old Windows versions
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In old versions of Windows such as 7 and 8.1 the Schannel TLS 1.2 handshake
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implementation likely has a bug that can rarely cause the key exchange to
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fail, resulting in error SEC_E_BUFFER_TOO_SMALL or SEC_E_MESSAGE_ALTERED.
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https://github.com/curl/curl/issues/5488
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2.13 CURLOPT_CERTINFO results in CURLE_OUT_OF_MEMORY with Schannel
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https://github.com/curl/curl/issues/8741
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3. Email protocols
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3.1 IMAP SEARCH ALL truncated response
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IMAP "SEARCH ALL" truncates output on large boxes. "A quick search of the
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code reveals that pingpong.c contains some truncation code, at line 408, when
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it deems the server response to be too large truncating it to 40 characters"
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https://curl.se/bug/view.cgi?id=1366
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3.2 No disconnect command
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The disconnect commands (LOGOUT and QUIT) may not be sent by IMAP, POP3 and
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SMTP if a failure occurs during the authentication phase of a connection.
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3.3 POP3 expects "CRLF.CRLF" eob for some single-line responses
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You have to tell libcurl not to expect a body, when dealing with one line
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response commands. Please see the POP3 examples and test cases which show
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this for the NOOP and DELE commands. https://curl.se/bug/?i=740
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3.4 AUTH PLAIN for SMTP is not working on all servers
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Specifying "--login-options AUTH=PLAIN" on the command line does not seem to
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work correctly.
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See https://github.com/curl/curl/issues/4080
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3.5 APOP authentication fails on POP3
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See https://github.com/curl/curl/issues/10073
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3.6 POP3 issue when reading small chunks
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CURL_DBG_SOCK_RMAX=4 ./runtests.pl -v 982
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See https://github.com/curl/curl/issues/12063
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4. Command line
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4.1 -T /dev/stdin may upload with an incorrect content length
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-T stats the path to figure out its size in bytes to use it as Content-Length
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if it is a regular file.
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The problem with that is that, on BSDs and some other UNIXes (not Linux),
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open(path) may not give you a file descriptor with a 0 offset from the start
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of the file.
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See https://github.com/curl/curl/issues/12177
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4.2 -T - always uploads chunked
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When the `<` shell operator is used. curl should realise that stdin is a
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regular file in this case, and that it can do a non-chunked upload, like it
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would do if you used -T file.
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See https://github.com/curl/curl/issues/12171
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5. Build and portability issues
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5.1 OS400 port requires deprecated IBM library
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curl for OS400 requires QADRT to build, which provides ASCII wrappers for
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libc/POSIX functions in the ILE, but IBM no longer supports or even offers
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this library to download.
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See https://github.com/curl/curl/issues/5176
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5.2 curl-config --libs contains private details
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"curl-config --libs" include details set in LDFLAGS when configure is run
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that might be needed only for building libcurl. Further, curl-config --cflags
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suffers from the same effects with CFLAGS/CPPFLAGS.
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5.3 building for old macOS fails with gcc
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Building curl for certain old macOS versions fails when gcc is used. We
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command using clang in those cases.
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See https://github.com/curl/curl/issues/11441
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5.5 cannot handle Unicode arguments in non-Unicode builds on Windows
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If a URL or filename cannot be encoded using the user's current codepage then
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it can only be encoded properly in the Unicode character set. Windows uses
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UTF-16 encoding for Unicode and stores it in wide characters, however curl
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and libcurl are not equipped for that at the moment except when built with
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_UNICODE and UNICODE defined. Except for Cygwin, Windows cannot use UTF-8 as
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a locale.
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https://curl.se/bug/?i=345
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https://curl.se/bug/?i=731
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https://curl.se/bug/?i=3747
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5.6 Cygwin: make install installs curl-config.1 twice
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https://github.com/curl/curl/issues/8839
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5.11 configure --with-gssapi with Heimdal is ignored on macOS
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... unless you also pass --with-gssapi-libs
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https://github.com/curl/curl/issues/3841
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5.12 flaky CI builds
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We run many CI builds for each commit and PR on github, and especially a
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number of the Windows builds are flaky. This means that we rarely get all CI
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builds go green and complete without errors. This is unfortunate as it makes
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us sometimes miss actual build problems and it is surprising to newcomers to
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the project who (rightfully) do not expect this.
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See https://github.com/curl/curl/issues/6972
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5.13 long paths are not fully supported on Windows
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curl on Windows cannot access long paths (paths longer than 260 characters).
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However, as a workaround, the Windows path prefix \\?\ which disables all path
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interpretation may work to allow curl to access the path. For example:
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\\?\c:\longpath.
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See https://github.com/curl/curl/issues/8361
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5.14 Windows Unicode builds use homedir in current locale
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The Windows Unicode builds of curl use the current locale, but expect Unicode
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UTF-8 encoded paths for internal use such as open, access and stat. The user's
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home directory is retrieved via curl_getenv in the current locale and not as
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UTF-8 encoded Unicode.
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See https://github.com/curl/curl/pull/7252 and
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https://github.com/curl/curl/pull/7281
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5.15 Unicode on Windows
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Passing in a Unicode filename with -o:
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https://github.com/curl/curl/issues/11461
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Passing in Unicode character with -d:
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https://github.com/curl/curl/issues/12231
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6. Authentication
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6.1 NTLM authentication and Unicode
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NTLM authentication involving Unicode username or password only works
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properly if built with UNICODE defined together with the Schannel
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backend. The original problem was mentioned in:
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https://curl.se/mail/lib-2009-10/0024.html
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https://curl.se/bug/view.cgi?id=896
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The Schannel version verified to work as mentioned in
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https://curl.se/mail/lib-2012-07/0073.html
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6.2 MIT Kerberos for Windows build
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libcurl fails to build with MIT Kerberos for Windows (KfW) due to KfW's
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library header files exporting symbols/macros that should be kept private to
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the KfW library. See ticket #5601 at https://krbdev.mit.edu/rt/
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6.3 NTLM in system context uses wrong name
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NTLM authentication using SSPI (on Windows) when (lib)curl is running in
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"system context" makes it use wrong(?) username - at least when compared to
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what winhttp does. See https://curl.se/bug/view.cgi?id=535
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6.5 NTLM does not support password with § character
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https://github.com/curl/curl/issues/2120
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6.6 libcurl can fail to try alternatives with --proxy-any
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When connecting via a proxy using --proxy-any, a failure to establish an
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authentication causes libcurl to abort trying other options if the failed
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method has a higher preference than the alternatives. As an example,
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--proxy-any against a proxy which advertise Negotiate and NTLM, but which
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fails to set up Kerberos authentication does not proceed to try
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authentication using NTLM.
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https://github.com/curl/curl/issues/876
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6.7 Do not clear digest for single realm
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https://github.com/curl/curl/issues/3267
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6.9 SHA-256 digest not supported in Windows SSPI builds
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Windows builds of curl that have SSPI enabled use the native Windows API calls
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to create authentication strings. The call to InitializeSecurityContext fails
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with SEC_E_QOP_NOT_SUPPORTED which causes curl to fail with CURLE_AUTH_ERROR.
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Microsoft does not document supported digest algorithms and that SEC_E error
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code is not a documented error for InitializeSecurityContext (digest).
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https://github.com/curl/curl/issues/6302
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6.10 curl never completes Negotiate over HTTP
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Apparently it is not working correctly...?
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See https://github.com/curl/curl/issues/5235
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6.11 Negotiate on Windows fails
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When using --negotiate (or NTLM) with curl on Windows, SSL/TLS handshake
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fails despite having a valid kerberos ticket cached. Works without any issue
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in Unix/Linux.
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https://github.com/curl/curl/issues/5881
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6.12 cannot use Secure Transport with Crypto Token Kit
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https://github.com/curl/curl/issues/7048
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6.13 Negotiate authentication against Hadoop HDFS
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https://github.com/curl/curl/issues/8264
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7. FTP
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7.1 FTP upload fails if remembered directory is deleted
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curl's FTP code assumes that the directory it entered in a previous transfer
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still exists when it comes back to do a second transfer, and does not respond
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well if it was indeed deleted in the mean time.
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https://github.com/curl/curl/issues/12181
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7.2 Implicit FTPS upload timeout
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https://github.com/curl/curl/issues/11720
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7.3 FTP with NOBODY and FAILONERROR
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It seems sensible to be able to use CURLOPT_NOBODY and CURLOPT_FAILONERROR
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with FTP to detect if a file exists or not, but it is not working:
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https://curl.se/mail/lib-2008-07/0295.html
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7.4 FTP with ACCT
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When doing an operation over FTP that requires the ACCT command (but not when
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logging in), the operation fails since libcurl does not detect this and thus
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fails to issue the correct command: https://curl.se/bug/view.cgi?id=635
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7.12 FTPS server compatibility on Windows with Schannel
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FTPS is not widely used with the Schannel TLS backend and so there may be
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more bugs compared to other TLS backends such as OpenSSL. In the past users
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have reported hanging and failed connections. It is likely some changes to
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curl since then fixed the issues. None of the reported issues can be
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reproduced any longer.
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If you encounter an issue connecting to your server via FTPS with the latest
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curl and Schannel then please search for open issues or file a new issue.
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9. SFTP and SCP
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9.1 SFTP does not do CURLOPT_POSTQUOTE correct
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When libcurl sends CURLOPT_POSTQUOTE commands when connected to a SFTP server
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using the multi interface, the commands are not being sent correctly and
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instead the connection is "cancelled" (the operation is considered done)
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prematurely. There is a half-baked (busy-looping) patch provided in the bug
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report but it cannot be accepted as-is. See
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https://curl.se/bug/view.cgi?id=748
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9.2 wolfssh: publickey auth does not work
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When building curl to use the wolfSSH backend for SFTP, the publickey
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authentication does not work. This is simply functionality not written for curl
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yet, the necessary API for make this work is provided by wolfSSH.
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See https://github.com/curl/curl/issues/4820
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9.3 Remote recursive folder creation with SFTP
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On this servers, the curl fails to create directories on the remote server
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even when the CURLOPT_FTP_CREATE_MISSING_DIRS option is set.
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See https://github.com/curl/curl/issues/5204
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9.4 libssh blocking and infinite loop problem
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In the SSH_SFTP_INIT state for libssh, the ssh session working mode is set to
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blocking mode. If the network is suddenly disconnected during sftp
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transmission, curl is stuck, even if curl is configured with a timeout.
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https://github.com/curl/curl/issues/8632
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9.5 Cygwin: "WARNING: UNPROTECTED PRIVATE KEY FILE!"
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Running SCP and SFTP tests on Cygwin makes this warning message appear.
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https://github.com/curl/curl/issues/11244
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10. SOCKS
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10.3 FTPS over SOCKS
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libcurl does not support FTPS over a SOCKS proxy.
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11. Internals
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11.1 gssapi library name + version is missing in curl_version_info()
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The struct needs to be expanded and code added to store this info.
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See https://github.com/curl/curl/issues/13492
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11.2 error buffer not set if connection to multiple addresses fails
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If you ask libcurl to resolve a hostname like example.com to IPv6 addresses
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when you only have IPv4 connectivity. libcurl fails with
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CURLE_COULDNT_CONNECT, but the error buffer set by CURLOPT_ERRORBUFFER
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remains empty. Issue: https://github.com/curl/curl/issues/544
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11.3 TFTP tests fail on OpenBSD
|
|
|
|
When adding an OpenBSD job with tests to GHA, some tests consistently fail
|
|
to run.
|
|
|
|
See https://github.com/curl/curl/issues/13623
|
|
|
|
11.4 HTTP test server 'connection-monitor' problems
|
|
|
|
The 'connection-monitor' feature of the sws HTTP test server does not work
|
|
properly if some tests are run in unexpected order. Like 1509 and then 1525.
|
|
|
|
See https://github.com/curl/curl/issues/868
|
|
|
|
11.5 Connection information when using TCP Fast Open
|
|
|
|
CURLINFO_LOCAL_PORT (and possibly a few other) fails when TCP Fast Open is
|
|
enabled.
|
|
|
|
See https://github.com/curl/curl/issues/1332 and
|
|
https://github.com/curl/curl/issues/4296
|
|
|
|
11.6 test cases sometimes timeout
|
|
|
|
Occasionally, one of the tests timeouts. Inexplicably.
|
|
|
|
See https://github.com/curl/curl/issues/13350
|
|
|
|
11.7 AppleIDN test failures
|
|
|
|
Test 1034 and 1035 fail on macOS when built to use AppleIDN.
|
|
|
|
See https://github.com/curl/curl/issues/14176
|
|
|
|
11.8 WinIDN test failures
|
|
|
|
Test 165 disabled when built with WinIDN.
|
|
|
|
12. LDAP
|
|
|
|
12.1 OpenLDAP hangs after returning results
|
|
|
|
By configuration defaults, OpenLDAP automatically chase referrals on
|
|
secondary socket descriptors. The OpenLDAP backend is asynchronous and thus
|
|
should monitor all socket descriptors involved. Currently, these secondary
|
|
descriptors are not monitored, causing OpenLDAP library to never receive
|
|
data from them.
|
|
|
|
As a temporary workaround, disable referrals chasing by configuration.
|
|
|
|
The fix is not easy: proper automatic referrals chasing requires a
|
|
synchronous bind callback and monitoring an arbitrary number of socket
|
|
descriptors for a single easy handle (currently limited to 5).
|
|
|
|
Generic LDAP is synchronous: OK.
|
|
|
|
See https://github.com/curl/curl/issues/622 and
|
|
https://curl.se/mail/lib-2016-01/0101.html
|
|
|
|
12.2 LDAP on Windows does authentication wrong?
|
|
|
|
https://github.com/curl/curl/issues/3116
|
|
|
|
12.3 LDAP on Windows does not work
|
|
|
|
A simple curl command line getting "ldap://ldap.forumsys.com" returns an
|
|
error that says "no memory" !
|
|
|
|
https://github.com/curl/curl/issues/4261
|
|
|
|
12.4 LDAPS requests to ActiveDirectory server hang
|
|
|
|
https://github.com/curl/curl/issues/9580
|
|
|
|
13. TCP/IP
|
|
|
|
13.2 Trying local ports fails on Windows
|
|
|
|
This makes '--local-port [range]' to not work since curl cannot properly
|
|
detect if a port is already in use, so it tries the first port, uses that and
|
|
then subsequently fails anyway if that was actually in use.
|
|
|
|
https://github.com/curl/curl/issues/8112
|
|
|
|
15. CMake
|
|
|
|
15.1 cmake outputs: no version information available
|
|
|
|
Something in the SONAME generation seems to be wrong in the cmake build.
|
|
|
|
https://github.com/curl/curl/issues/11158
|
|
|
|
15.2 support build with GnuTLS
|
|
|
|
15.3 unusable tool_hugehelp.c with MinGW
|
|
|
|
see https://github.com/curl/curl/issues/3125
|
|
|
|
15.6 uses -lpthread instead of Threads::Threads
|
|
|
|
See https://github.com/curl/curl/issues/6166
|
|
|
|
15.7 generated .pc file contains strange entries
|
|
|
|
The Libs.private field of the generated .pc file contains -lgcc -lgcc_s -lc
|
|
-lgcc -lgcc_s
|
|
|
|
See https://github.com/curl/curl/issues/6167
|
|
|
|
15.11 ExternalProject_Add does not set CURL_CA_PATH
|
|
|
|
CURL_CA_BUNDLE and CURL_CA_PATH are not set properly when cmake's
|
|
ExternalProject_Add is used to build curl as a dependency.
|
|
|
|
See https://github.com/curl/curl/issues/6313
|
|
|
|
15.13 CMake build with MIT Kerberos does not work
|
|
|
|
Minimum CMake version was bumped in curl 7.71.0 (#5358) Since CMake 3.2
|
|
try_compile started respecting the CMAKE_EXE_FLAGS. The code dealing with
|
|
MIT Kerberos detection sets few variables to potentially weird mix of space,
|
|
and ;-separated flags. It had to blow up at some point. All the CMake checks
|
|
that involve compilation are doomed from that point, the configured tree
|
|
cannot be built.
|
|
|
|
https://github.com/curl/curl/issues/6904
|
|
|
|
16. aws-sigv4
|
|
|
|
16.2 aws-sigv4 does not handle multipart/form-data correctly
|
|
|
|
https://github.com/curl/curl/issues/13351
|
|
|
|
16.3 aws-sigv4 has problems with particular URLs
|
|
|
|
https://github.com/curl/curl/issues/13058
|
|
|
|
16.6 aws-sigv4 does not behave well with AWS VPC Lattice
|
|
|
|
https://github.com/curl/curl/issues/11007
|
|
|
|
17. HTTP/2
|
|
|
|
17.1 HTTP/2 prior knowledge over proxy
|
|
|
|
https://github.com/curl/curl/issues/12641
|
|
|
|
17.2 HTTP/2 frames while in the connection pool kill reuse
|
|
|
|
If the server sends HTTP/2 frames (like for example an HTTP/2 PING frame) to
|
|
curl while the connection is held in curl's connection pool, the socket is
|
|
found readable when considered for reuse and that makes curl think it is dead
|
|
and then it is closed and a new connection gets created instead.
|
|
|
|
This is *best* fixed by adding monitoring to connections while they are kept
|
|
in the pool so that pings can be responded to appropriately.
|
|
|
|
17.3 ENHANCE_YOUR_CALM causes infinite retries
|
|
|
|
Infinite retries with 2 parallel requests on one connection receiving GOAWAY
|
|
with ENHANCE_YOUR_CALM error code.
|
|
|
|
See https://github.com/curl/curl/issues/5119
|
|
|
|
17.4 HTTP/2 + TLS spends a lot of time in recv
|
|
|
|
It has been observered that by making the speed limit less accurate we could
|
|
improve this performance. (by reverting
|
|
https://github.com/curl/curl/commit/db5c9f4f9e0779b49624752b135281a0717b277b)
|
|
Can we find a golden middle ground?
|
|
|
|
See https://curl.se/mail/lib-2024-05/0026.html and
|
|
https://github.com/curl/curl/issues/13416
|
|
|
|
18. HTTP/3
|
|
|
|
18.1 connection migration does not work
|
|
|
|
https://github.com/curl/curl/issues/7695
|
|
|
|
18.2 quiche: QUIC connection is draining
|
|
|
|
The transfer ends with error "QUIC connection is draining".
|
|
|
|
https://github.com/curl/curl/issues/12037
|
|
|
|
19. RTSP
|
|
|
|
19.1 Some methods do not support response bodies
|
|
|
|
The RTSP implementation is written to assume that a number of RTSP methods
|
|
always get responses without bodies, even though there seems to be no
|
|
indication in the RFC that this is always the case.
|
|
|
|
https://github.com/curl/curl/issues/12414
|