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//! # async-proxy
//!
//! The crate `async-proxy` provides a fast and flexible,
//! as well as asyncronous implementation of proxy clients
//! and proxy-related utilities.
//!
//! # Example
//!
//! ```
//! use async_proxy::clients::socks4::no_ident::Socks4NoIdent;
//! use async_proxy::general::ConnectionTimeouts;
//! use async_proxy::proxy::ProxyConstructor;
//! use tokio::net::TcpStream;
//! use std::net::{SocketAddr, SocketAddrV4};
//! use std::time::Duration;
//! use std::process::exit;
//!
//! #[tokio::main]
//! async fn main() {
//! // The address of the proxy server that
//! // will be used to connect through.
//! // (We used a random proxy from `https://hidemy.name/en/proxy-list/`)
//! let proxy_addr: SocketAddr = "104.248.63.15:30588".parse().unwrap();
//!
//! // The address of the destination service
//! // that we will be connecting to through proxy.
//! // (We used a tcp echo server from `http://tcpbin.org/`)
//! let dest_addr: SocketAddrV4 = "52.20.16.20:30000".parse().unwrap();
//!
//! // Setting up timeouts
//! let timeouts = ConnectionTimeouts::new(
//! // Connecting timeout
//! Duration::from_secs(8),
//! // Write timeout
//! Duration::from_secs(8),
//! // Read timeout
//! Duration::from_secs(8)
//! );
//!
//! // Creating the socks4 constructor,
//! // using which we will establish a connection
//! // through proxy
//! let socks4_proxy = Socks4NoIdent::new(dest_addr, timeouts);
//!
//! // Connecting to the stream and getting the readable and
//! // writable stream, or terminating the script if it is
//! // unable to connect
//! let stream = TcpStream::connect(proxy_addr)
//! .await
//! .expect("Unable to connect to the proxy server");
//!
//! // Connecting to the service through proxy
//! let stream = match socks4_proxy.connect(stream).await {
//! Ok(stream) => {
//! // Successfully connected to the service
//! stream
//! },
//! Err(e) => {
//! // -- handling the error -- //
//! exit(1);
//! }
//! };
//! }
//! ```
//!
/// Module responsible for functionality
/// related to proxy clients interfaces
/// (eg. common definitions and traits)
/// Module responsible for client implementations
/// of known and most-used proxifications
/// protocols, such as Socks4/5, HTTP(s)
/// proxies
/// Module contains types and definitions
/// that are widely and generally used
/// over the library