8 releases
0.2.5 | Jul 26, 2023 |
---|---|
0.2.4 | Jul 25, 2023 |
0.1.1 | Jul 11, 2023 |
#101 in WebSocket
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rs-connections
Table of Contents
Introduction
This crate is used to create a connection to a server. It can be used to create a connection to a server using the TCP or WebSocket protocol. The connection is created using the tokio library. (TCP and UDP is not supported yet)
Features
- Support for TCP, UDP, and WebSocket protocols.
- Connection state management (Init, Connecting, Connected, Closed, Closing, Reconnect).
- Event handling for various connection-related events.
Installation
Add the following line to your Cargo.toml
file:
[dependencies]
rs-connections = "0.2.5"
Usage
use rs_connections::{ConnBuilderConfig, Protocol, ConnBuilder, ConnectError, ConnectionInterface};
#[tokio::main]
async fn main() {
let connect_opt = ConnBuilderConfig {
host: "127.0.0.1".to_string(),
port: 9673,
heartbeat_time: Some(10000), // Optional heartbeat time
protocol: Protocol::WEBSOCKET,
};
// Create a connection using the ConnBuilder
let mut conn = ConnBuilder::new(connect_opt).build();
}
Connecting to a Server
To establish a connection to the server:
async fn connect_to_server() {
let mut conn = // ... create and configure the connection
conn.connect().await.unwrap();
}
Handling Connection Events
You can listen for different connection events using the Emitter trait:
Base usage
use rs_connections::{
ConnBuilder, ConnBuilderConfig, ConnectionInterface, Emitter, EventHandler, Protocol,
CONNECTED_EVENT,
};
#[tokio::main]
async fn main() {
let connect_opt = ConnBuilderConfig {
host: "127.0.0.1".to_string(),
port: 9673,
heartbeat_time: Some(10000),
protocol: Protocol::WEBSOCKET,
};
let mut conn = ConnBuilder::new(connect_opt).build();
conn.connect().await.unwrap();
let my_event = EventHandler::new(Box::new(|data: &str| {
println!("event connecting: {}", data);
}));
conn.on("my_event", my_event.clone());
// Emit the event
// The parameter types must match
conn.emit("my_event", "hello world");
// Remove the event
conn.off("my_event", my_event);
// more parameters, use tuple
conn.on("my_event", |data: (&str, &str)| {
println!("event connecting: {}", data.0);
println!("event connecting: {}", data.1);
})
conn.emit("my_event", ("hello", "world"));
}
Provided basic events are:
pub static CONNECTING_EVENT: &str = "connecting";
pub static CONNECTED_EVENT: &str = "connected";
pub static CLOSE_EVENT: &str = "close";
pub static DISCONNECT_EVENT: &str = "disconnect";
pub static ERROR_EVENT: &str = "error";
pub static MESSAGE_EVENT: &str = "message";
pub static RECONNECT_EVENT: &str = "reconnect";
connecting
: Emitted when the connection is being established.- listen parameter:
&str
- emit parameter:
&str
- listen parameter:
connected
: Emitted when the connection is established.- listen parameter:
&str
- emit parameter:
&str
- listen parameter:
disconnect
: Emitted when the connection is disconnect.- listen parameter:
&str
- emit parameter:
&str
- listen parameter:
reconnect
: Emitted when the connection is re-established.- listen parameter:
String
- emit parameter:
String
- listen parameter:
close
: Emitted when the connection is close.- listen parameter:
String
- emit parameter:
String
- listen parameter:
error
: Emitted when an error occurs.- listen parameter:
ConnectError
- emit parameter:
ConnectError
- listen parameter:
message
: Emitted when a message is received.- listen parameter:
String
Text messageVec<u8>
Binary message
- emit parameter:
&str
String
Test messageVec<u8>
Binary message
- listen parameter:
Example
use rs_connections::{ConnBuilderConfig, Protocol, ConnBuilder, ConnectError, ConnectionInterface};
#[tokio::main]
async fn main() {
let connect_opt = ConnBuilderConfig {
host: "127.0.0.1".to_string(),
port: 9673,
heartbeat_time: Some(10000), // Optional heartbeat time
protocol: Protocol::WEBSOCKET,
};
let mut conn = ConnBuilder::new(connect_opt).build();
let handle_connecting = EventHandler::new(Box::new(|data: &str| {
println!("event connecting: {}", data);
}));
let handle_connected = EventHandler::new(Box::new(|data: &str| {
println!("event connected: {}", data);
}));
let handle_disconnect = EventHandler::new(Box::new(|data: &str| {
println!("event disconnect: {}", data);
}));
let handle_reconnect = EventHandler::new(Box::new(|data: String| {
println!("event reconnect: {}", data);
}));
let handle_close = EventHandler::new(Box::new(|data: String| {
println!("event close: {}", data);
}));
let handle_error = EventHandler::new(Box::new(|data: ConnectError| {
println!("event error: {}", data);
}));
let handle_text_message = EventHandler::new(Box::new(|data: String| {
println!("event message: {}", data);
}));
let handle_binary_message = EventHandler::new(Box::new(|data: Vec<u8>| {
println!("event binary message: {:?}", data);
}));
// Add event listener
// add connecting event listener
conn.on(CONNECTING_EVENT, handle_connecting.clone());
// add connected event listener
conn.on(CONNECTED_EVENT, handle_connected.clone());
// add disconnect event listener
conn.on(DISCONNECT_EVENT, handle_disconnect.clone());
// add reconnect event listener
conn.on(RECONNECT_EVENT, handle_reconnect.clone());
// add close event listener
conn.on(CLOSE_EVENT, handle_close.clone());
// add error event listener
conn.on(ERROR_EVENT, handle_error.clone());
// add message event listener
conn.on(MESSAGE_EVENT, handle_text_message.clone());
// add binary message event listener
conn.on(MESSAGE_EVENT, handle_binary_message.clone());
conn.connect().await.unwrap();
}
Sending Messages
You can send messages to the server using the send
method:
async fn send_message() {
let mut conn = // ... create and configure the connection
conn.connect().await.unwrap();
conn.send("Hello World").await.unwrap();
}
Receiving Messages
You can receive messages from the server using the receive
method or use message event:
async fn receive_message() {
let mut conn = // ... create and configure the connection
conn.connect().await.unwrap();
loop {
match conn.receive().await {
Ok(data) => {
// data is String or Vec<u8>
println!("receive");
},
Err(_) => {
println!("receive err");
},
}
}
}
async fn receive_message() {
let mut conn = // ... create and configure the connection
conn.connect().await.unwrap();
conn.on(MESSAGE_EVENT, |data: String| {
println!("Received message: {}", data);
});
conn.on(MESSAGE_EVENT, |data: Vec<u8>| {
println!("Received binary message: {:?}", data);
});
}
Closing the Connection
You can close the connection using the disconnect
method:
async fn close_connection() {
let mut conn = // ... create and configure the connection
conn.connect().await.unwrap();
conn.disconnect().await.unwrap();
}
API Documentation
You can find the API documentation here.
Contributing
Contributions are welcome! Feel free to open an issue or submit a pull request if you have a way to improve this project.
License
This project is licensed under the MIT License. See the LICENSE file for details.
Dependencies
~10–17MB
~243K SLoC