note about the need for extra functions set to OpenSSL if you use OpenSSL
multi-threaded
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@ -222,7 +222,14 @@ Multi-threading issues
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handlers. Signals are needed for a SIGPIPE handler, and the alarm() syscall
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is used to catch timeouts (mostly during DNS lookup).
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So when using multiple threads you should first ignore SIGPIPE in your main
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If you are accessing HTTPS or FTPS URLs in a multi-threaded manner, you are
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then of course using OpenSSL multi-threaded and it has itself a few
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requirements on this. Basicly, you need to provide one or two functions to
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allow it to function properly. For all details, see this:
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http://www.openssl.org/docs/crypto/threads.html#DESCRIPTION
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When using multiple threads you should first ignore SIGPIPE in your main
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thread and set the CURLOPT_NOSIGNAL option to TRUE for all handles.
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Everything will work fine except that timeouts are not honored during the DNS
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