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instance method

BasicSocket#send

basicsocket.send(mesg, flags [, dest_sockaddr]) => numbytes_sent

ext/socket/basicsocket.c View on GitHub ↗

VALUE
rsock_bsock_send(int argc, VALUE *argv, VALUE socket)
{
    struct rsock_send_arg arg;
    VALUE flags, to;
    rb_io_t *fptr;
    rb_blocking_function_t *func;
    const char *funcname;

    rb_scan_args(argc, argv, "21", &arg.mesg, &flags, &to);

    StringValue(arg.mesg);
    if (!NIL_P(to)) {
        SockAddrStringValue(to);
        to = rb_str_new4(to);
        arg.to = (struct sockaddr *)RSTRING_PTR(to);
        arg.tolen = RSTRING_SOCKLEN(to);
        func = rsock_sendto_blocking;
        funcname = "sendto(2)";
    }
    else {
        func = rsock_send_blocking;
        funcname = "send(2)";
    }

    RB_IO_POINTER(socket, fptr);

    arg.fd = fptr->fd;
    arg.flags = NUM2INT(flags);

    while (true) {
#ifdef RSOCK_WAIT_BEFORE_BLOCKING
        rb_io_wait(socket, RB_INT2NUM(RUBY_IO_WRITABLE), Qnil);
#endif

        ssize_t n = (ssize_t)BLOCKING_REGION_FD(func, &arg);

        if (n >= 0) return SSIZET2NUM(n);

        if (rb_io_maybe_wait_writable(errno, socket, RUBY_IO_TIMEOUT_DEFAULT)) {
            continue;
        }

        rb_sys_fail(funcname);
    }
}

send mesg via basicsocket.

mesg should be a string.

flags should be a bitwise OR of Socket::MSG_* constants.

dest_sockaddr should be a packed sockaddr string or an addrinfo.

Example

TCPSocket.open("localhost", 80) {|s|
  s.send "GET / HTTP/1.0\r\n\r\n", 0
  p s.read
}

See also #remote_address #sendmsg #recv_nonblock #sendmsg_nonblock also in 4.1 · 4.0 · 3.4 · 3.3 · 3.1 · 3.0

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