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Diffstat (limited to 'FAQ')
| -rw-r--r-- | FAQ | 85 |
1 files changed, 0 insertions, 85 deletions
@@ -1,85 +0,0 @@ - _ _ ____ _ - ___| | | | _ \| | - / __| | | | |_) | | - | (__| |_| | _ <| |___ - \___|\___/|_| \_\_____| - -FAQ - -Problems connecting to SSL servers. -=================================== - - It took a very long time before I could sort out why curl had problems - to connect to certain SSL servers when using SSLeay or OpenSSL v0.9+. - The error sometimes showed up similar to: - - 16570:error:1407D071:SSL routines:SSL2_READ:bad mac decode:s2_pkt.c:233: - - It turned out to be because many older SSL servers don't deal with SSLv3 - requests properly. To correct this problem, tell curl to select SSLv2 from - the command line (-2/--sslv2). - - I have also seen examples where the remote server didn't like the SSLv2 - request and instead you had to force curl to use SSLv3 with -3/--sslv3. - -Does curl support resume? -========================= - - Yes. Both ways on FTP, download ways on HTTP. - -Is libcurl thread safe? -======================= - - Yes, as far as curl's own code goes. It does use system calls that often - aren't thread safe in most environments, such as gethostbyname(). - - I am very interested in once and for all getting some kind of report or - README file from those who have used libcurl in a threaded environment, - since I haven't and I get this question more and more frequently! - -Why doesn't my posting using -F work? -===================================== - - You can't simply use -F or -d at your choice. The web server that will - receive your post assumes one of the formats. If the form you're trying to - "fake" sets the type to 'multipart/form-data', than and only then you must - use the -F type. In all the most common cases, you should use -d which then - causes a posting with the type 'application/x-www-form-urlencoded'. - -Does curl support custom FTP commands? -====================================== - - Yes it does, you can tell curl to perform optional commands both before - and/or after a file transfer. Study the -Q/--quote option. - - Since curl is used for file transfers, you don't use curl to just perform - ftp commands without transfering anything. Therefore you must always specify - a URL to transfer to/from even when doing custom FTP commands. - -Does curl work with other SSL libraries? -======================================== - - Curl has been written to use OpenSSL, although I doubt there would be much - problems using a different library. I just don't know any other free one and - that has limited my possibilities to develop against anything else. - - If anyone does "port" curl to use a commercial SSL library, I am of course - very interested in getting the patch! - -configre doesn't find OpenSSL even when it is installed -======================================================= - - Platforms: Solaris (native cc compiler) and HPUX (native cc compiler) - - When configuring curl, I specify --with-ssl. OpenSSL is installed in - /usr/local/ssl Configure reports SSL in /usr/local/ssl, but fails to find - CRYPTO_lock in -lcrypto - - Cause: The cc for this test places the -L/usr/local/ssl/lib AFTER -lcrypto, - so ld can't find the library. This is due to a bug in the GNU autoconf tool. - - Workaround: Specifying "LDFLAGS=-L/usr/local/ssl/lib" in front of ./configure - places the -L/usr/local/ssl/lib early enough in the command line to make - things work - - Submitted by: Bob Allison <allisonb@users.sourceforge.net> |