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Ruby

Wait for a Socket to Become Writable

See more Socket/SSL/TLS Examples

Demonstrates Socket.SelectForWriting, which waits for the socket, or sockets in a socket set, to become writable. It returns 1 if writable, 0 on timeout, or -1 on error.

Background. A timeoutMs of 0 performs a nonblocking poll. This is useful before attempting to send when the peer may be applying flow control.

Chilkat Ruby Downloads

Ruby
require 'chilkat'

success = false

socket = Chilkat::CkSocket.new()

#  Connect to the server using TLS.
bTls = true
maxWaitMs = 5000
success = socket.Connect("example.com",5000,bTls,maxWaitMs)
if (success == false)
    print socket.lastErrorText() + "\n";
    exit
end

#  Wait up to 5 seconds for the socket (or sockets in a socket set) to become writable.  Returns 1 if
#  writable, 0 on timeout, or -1 on error.
ready = socket.SelectForWriting(5000)
if (ready < 0)
    print socket.lastErrorText() + "\n";
    exit
end

if (ready != 1)
    print "The socket did not become writable before the timeout." + "\n";
    exit
end

print "The socket is ready for writing." + "\n";