rickmorty

rickmorty.rs

// Import the crates
use clap::{App, Arg, SubCommand};
use reqwest::Client;
use std::error::Error;
use hyper::service::{make_service_fn, service_fn};
use hyper::{Body, Request, Response, Server};
use std::net::SocketAddr;
use std::convert::Infallible;


#[tokio::main]
async fn main() {
    // Create a CLI app with clap
    let mut app = App::new("Rick and Morty CLI")
        .version("0.1.0")
        .author("Your Name <your.email@example.com>")
        .about("A CLI application to consume the Rick and Morty API")
        .subcommand(
            SubCommand::with_name("character")
                .about("Get information about a character by ID")
                .arg(
                    Arg::with_name("id")
                        .help("The ID of the character")
                        .required(true)
                        .index(1),
                ),
        )
        .subcommand(
            SubCommand::with_name("episode")
                .about("Get information about an episode by ID")
                .arg(
                    Arg::with_name("id")
                        .help("The ID of the episode")
                        .required(true)
                        .index(1),
                ),
        )
        .subcommand(
            SubCommand::with_name("location")
                .about("Get information about a location by ID")
                .arg(
                    Arg::with_name("id")
                        .help("The ID of the location")
                        .required(true)
                        .index(1),
                ),
        )
        .subcommand(
            SubCommand::with_name("proxy")
                .about("Spin up a proxy server to cache the API results")
                .arg(
                    Arg::with_name("port")
                        .help("The port to listen on")
                        .default_value("8000")
                        .index(1),
                ),
        )
        .subcommand(SubCommand::with_name("help").about("Prints help information"));

    // Parse the command-line arguments
    let matches = app.clone().get_matches();

    // Create a HTTP client with reqwest
    let client = Client::new();

    match matches.subcommand() {
        Some(("character", sub_matches)) => {
            // Get the character ID from the argument
            let id = sub_matches.value_of("id").unwrap();

            // Build the URL for the API request
            let url = format!("https://rickandmortyapi.com/api/character/{}", id);

            // Make a GET request to the API and get the response
            let response = client.get(&url).send().await.unwrap();

            // Check if the response is successful
            if response.status().is_success() {
                // Parse the response body as a JSON value
                let json_str = response.text().await.unwrap();
                let json: serde_json::Value = serde_json::from_str(&json_str).unwrap();

                // Print the JSON value
                println!("{:?}", json);
            } else {
                // Print the status code and the error message
                println!(
                    "Error: {} {}",
                    response.status(),
                    response
                        .text()
                        .await
                        .unwrap_or_else(|_| "Fetching error".to_string())
                );
            }
        }

        Some(("episode", sub_matches)) => {
            // Get the episode ID from the argument
            let id = sub_matches.value_of("id").unwrap();

            // Build the URL for the API request
            let url = format!("https://rickandmortyapi.com/api/episode/{}", id);

            // Make a GET request to the API and get the response
            let response = client.get(&url).send().await.unwrap();

            // Check if the response is successful
            if response.status().is_success() {
                let json_str = response.text().await.unwrap();
                let json: serde_json::Value = serde_json::from_str(&json_str).unwrap();

                // Print the JSON value
                println!("{:?}", json);
            } else {
                // Print the status code and the error message
                println!(
                    "Error: {} {}",
                    response.status(),
                    response
                        .text()
                        .await
                        .unwrap_or_else(|_| "Fetching error".to_string())
                );
            }
        }

        Some(("location", sub_matches)) => {
            // Get the episode ID from the argument
            let id = sub_matches.value_of("id").unwrap();

            // Build the URL for the API request
            let url = format!("https://rickandmortyapi.com/api/location/{}", id);

            // Make a GET request to the API and get the response
            let response = client.get(&url).send().await.unwrap();

            // Check if the response is successful
            if response.status().is_success() {
                // Parse the response body as a JSON value
                let json_str = response.text().await.unwrap();
                let json: serde_json::Value = serde_json::from_str(&json_str).unwrap();

                // Print the JSON value
                println!("{:?}", json);
            } else {
                // Print the status code and the error message
                println!(
                    "Error: {} {}",
                    response.status(),
                    response
                        .text()
                        .await
                        .unwrap_or_else(|_| "Fetching error".to_string())
                );
            }
        }

        Some(("proxy", sub_matches)) => {
            let port = sub_matches.value_of("port").unwrap_or("8000");
            let addr = format!("127.0.0.1:{}", port).parse().unwrap();
            println!("Starting proxy server on port {}", port);
            run_proxy(addr).await.unwrap();
        }

        Some(("help", _)) => {
            println!("{}", app.render_usage());
        }

        _ => {
            // Handle the case where no subcommand was provided or an unknown subcommand was used
            eprintln!("No subcommand provided or an unknown subcommand was used.");
        }
    }
}

async fn run_proxy(addr: SocketAddr) -> Result<(), Box<dyn Error>> {
    let make_svc = make_service_fn(|_conn| async {
        Ok::<_, Infallible>(service_fn(|req: Request<Body>| async move {
            handle_request(req).await
        }))
    });
 
    let server = Server::bind(&addr).serve(make_svc);
    println!("Proxy server listening on http://{}", addr);
 
    if let Err(e) = server.await {
        eprintln!("server error: {}", e);
    }
 
    Ok(())
}

async fn handle_request(req: Request<Body>) -> Result<Response<Body>, hyper::Error> {
    // Forward request to target server
    let client = reqwest::Client::new();
    let target_url = format!("https://rickandmortyapi.com{}", req.uri());
    let mut request_builder = client.request(req.method().clone(), &target_url);
    
    // Set request headers
    for (header_name, header_value) in req.headers() {
        request_builder = request_builder.header(header_name.clone(), header_value.to_str().unwrap());
    }

    let request = request_builder.body(Body::from(req.into_body())).build().expect("can't build request");
    let response = client.execute(request).await.expect("");
    
    // Build response to be returned to client
    let mut builder = Response::builder().status(response.status());
    // Set response headers
    for (header_name, header_value) in response.headers() {
        builder = builder.header(header_name.clone(), header_value.to_str().unwrap());
    }
    let bytes = response.bytes().await.expect("");
    let body = Body::from(bytes);
    let  res = builder.body(body).expect("");
    Ok(res)
}



#[cfg(test)]
mod tests {
    use super::*;

    #[tokio::test]
    async fn test_character_command() {
        let id = "1";
        let client = Client::new();
        let url = format!("https://rickandmortyapi.com/api/character/{}", id);
        let response = client.get(&url).send().await.unwrap();
        assert!(response.status().is_success());
    }

    #[tokio::test]
    async fn test_episode_command() {
        let id = "1";
        let client = Client::new();
        let url = format!("https://rickandmortyapi.com/api/episode/{}", id);
        let response = client.get(&url).send().await.unwrap();
        assert!(response.status().is_success());
    }

    #[tokio::test]
    async fn test_location_command() {
        let id = "1";
        let client = Client::new();
        let url = format!("https://rickandmortyapi.com/api/location/{}", id);
        let response = client.get(&url).send().await.unwrap();
        assert!(response.status().is_success());
    }
}