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//{
#[cfg(not(windows))]
fn main() {}
#[cfg(windows)]
fn main() -> std::io::Result<()> {
//}
use {
interprocess::os::windows::named_pipe::*,
std::io::{prelude::*, BufReader},
};
// Preemptively allocate a sizeable buffer for receiving. This size should be enough and
// should be easy to find for the allocator.
let mut buffer = String::with_capacity(128);
// Create our connection. This will block until the server accepts our connection, but will
// fail immediately if the server hasn't even started yet; somewhat similar to how happens
// with TCP, where connecting to a port that's not bound to any server will send a "connection
// refused" response, but that will take twice the ping, the roundtrip time, to reach the
// client.
let conn = DuplexPipeStream::<pipe_mode::Bytes>::connect_by_path(r"\\.\pipe\Example")?;
// Wrap it into a buffered reader right away so that we could receive a single line out of it.
let mut conn = BufReader::new(conn);
// Send our message into the stream. This will finish either when the whole message has been
// sent or if a send operation returns an error. (`.get_mut()` is to get the sender,
// `BufReader` doesn't implement a pass-through `Write`.)
conn.get_mut().write_all(b"Hello from client!\n")?;
// We now employ the buffer we allocated prior and receive a single line, interpreting a
// newline character as an end-of-file (because local sockets cannot be portably shut down),
// verifying validity of UTF-8 on the fly.
conn.read_line(&mut buffer)?;
// Print out the result, getting the newline for free!
print!("Server answered: {buffer}");
//{
Ok(())
} //}
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