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curl/FAQ

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1999-12-29 09:20:26 -05:00
Date: 19 November 1999
Frequently Asked Questions about Curl
1. 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.
2. Does curl support resume?
Yes. Both ways on FTP, download ways on HTTP.
3. 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!