Image courtesy of centrifugal.dev

Rucent

Rucent is a Rust library designed to facilitate communication with Centrifugo's HTTP API. It provides seamless interaction with Centrifugo's server for managing real-time messaging and client interactions. With Rucent, you can issue API commands such as publishing messages, managing subscriptions, and retrieving history data.

Features

• Publish messages to specific channels.
• Manage subscriptions and disconnections.
• Retrieve historical data from Centrifugo.
• Batch multiple commands in a single request for efficiency.

Requirements

Before using Rucent, ensure you have:

• Rust installed on your system (version 1.65 or later).
• A running instance of Centrifugo.

Installation

Add the Rucent library to your Cargo.toml dependencies:

[dependencies]
rucent = "0.1.4"

Enable optional features as needed:

[features]
with_local_server = []

Usage

Example: Sending a Publish Command

use rucent::client::{Client, Config};

#[tokio::main]
async fn main() {
    let config = Config {
        addr: Some("http://127.0.0.1:8000/api".to_string()),
        key: Some("your_api_key".to_string()),
        http_client: None,
    };

    let client = Client::new(config);

    let channel = "test_channel";
    let payload = serde_json::json!({ "input": "Hello, Rucent!" });

    match client.publish(channel.to_string(), payload, &[]).await {
        Ok(response) => println!("Publish successful: {:?}", response),
        Err(err) => eprintln!("Error: {:?}", err),
    }
}

Example: Broadcast to Multiple Channels

--snip--
    let mut channels = Vec::new();

    for i in 0..10 {
        channels.push(format!("test_channel_{}", i));
    }


    let broadcast_result = client
        .broadcast(channels, r#"{"date": "2024-12-28"}"#, &[])
        .await;

    log::info!("Broadcasted to {} channels successfully", broadcast_result.unwrap().responses.len());

Example: Batching Multiple Commands

#[tokio::main]
async fn main() {
    let config = Config {
        addr: Some("http://127.0.0.1:8000/api".to_string()),
        key: Some("your_api_key".to_string()),
        http_client: None,
    };

    let client = Client::new(config);
    let pipe = client.pipe();

    let channel = Rc::new("chan3".to_string());

    let count = 10;

    for _ in 0..count {
        let _ = pipe.add_publish(channel.to_string(), r#"{"input": "test1"}"#, &[]);
    }

    let replies = match client.send_pipe(&pipe).await {
        Ok(reply) => reply,
        Err(err) => {
            println!("an error occurred while sending pipe {err}");
            Vec::new()
        }
    };

    let reply_len = replies.len();

    for reply in replies {
        if let Some(err) = reply.error {
            println!("An error occured with {err}");
        }
    }

    println!("Sent {reply_len} commands in one http request");
}

Running Tests

With Local Environment

To run tests using a local Centrifugo instance, provide the required environment variables:

API_URL=http://127.0.0.1:8000/api API_KEY=fa7ce149-b279-4870-af59-ad7ce78ef11a cargo test --test client --features with_local_server -- --nocapture

Without Local Environment

To run tests without a local Centrifugo instance:

cargo test --test client -- --nocapture

References

• The code was developed following the specification in this proto file: api.proto
• Learn more about Centrifugo at centrifugal.dev

Contributing

We welcome contributions! Feel free to open issues, submit pull requests, or suggest new features.

Steps to Contribute

1. Fork the repository.
2. Create a feature branch: git checkout -b feature-branch-name.
3. Make your changes and commit them: git commit -m "Description of changes".
4. Push to your fork: git push origin feature-branch-name.
5. Open a pull request against the main repository.

License

Rucent is licensed under either of the following licenses, at your option:

• MIT License
• Apache License 2.0

See LICENSE-MIT or LICENSE-APACHE for details.