method

connect_nonblock

v1_8_7_330 - Show latest stable - 0 notes - Class: Socket

connect_nonblock(p1) public

Requests a connection to be made on the given server_sockaddr after O_NONBLOCK is set for the underlying file descriptor. Returns 0 if successful, otherwise an exception is raised.

Parameter

server_sockaddr - the struct sockaddr contained in a string

Example:

# Pull down Google's web page
require 'socket'
include Socket::Constants
socket = Socket.new(AF_INET, SOCK_STREAM, 0)
sockaddr = Socket.sockaddr_in(80, 'www.google.com')
begin
  socket.connect_nonblock(sockaddr)
rescue Errno::EINPROGRESS
  IO.select(nil, [socket])
  begin
    socket.connect_nonblock(sockaddr)
  rescue Errno::EISCONN
  end
end
socket.write("GET / HTTP/1.0\r\n\r\n")
results = socket.read

Refer to Socket#connect for the exceptions that may be thrown if the call to connect_nonblock fails.

Socket#connect_nonblock may raise any error corresponding to connect(2) failure, including Errno::EINPROGRESS.

See

Socket#connect

Show source

/*
 * call-seq:
 *      socket.connect_nonblock(server_sockaddr) => 0
 * 
 * Requests a connection to be made on the given +server_sockaddr+ after
 * O_NONBLOCK is set for the underlying file descriptor.
 * Returns 0 if successful, otherwise an exception is raised.
 *  
 * === Parameter
 * * +server_sockaddr+ - the +struct+ sockaddr contained in a string
 * 
 * === Example:
 *      # Pull down Google's web page
 *      require 'socket'
 *      include Socket::Constants
 *      socket = Socket.new(AF_INET, SOCK_STREAM, 0)
 *      sockaddr = Socket.sockaddr_in(80, 'www.google.com')
 *      begin
 *        socket.connect_nonblock(sockaddr)
 *      rescue Errno::EINPROGRESS
 *        IO.select(nil, [socket])
 *        begin
 *          socket.connect_nonblock(sockaddr)
 *        rescue Errno::EISCONN
 *        end
 *      end
 *      socket.write("GET / HTTP/1.0\r\n\r\n")
 *      results = socket.read 
 * 
 * Refer to Socket#connect for the exceptions that may be thrown if the call
 * to _connect_nonblock_ fails. 
 *
 * Socket#connect_nonblock may raise any error corresponding to connect(2) failure,
 * including Errno::EINPROGRESS.
 *
 * === See
 * * Socket#connect
 */
static VALUE
sock_connect_nonblock(sock, addr)
    VALUE sock, addr;
{
    rb_io_t *fptr;
    int n;

    StringValue(addr);
    addr = rb_str_new4(addr);
    GetOpenFile(sock, fptr);
    rb_io_set_nonblock(fptr);
    n = connect(fileno(fptr->f), (struct sockaddr*)RSTRING(addr)->ptr, RSTRING(addr)->len);
    if (n < 0) {
        rb_sys_fail("connect(2)");
    }

    return INT2FIX(n);
}

connect_nonblock

Related methods

Parameter

Example:

See