feat(main): Add barebares thread listing
This ties together the first components here (actix, diesel etc.) to provide a _very_ simple thread overview.
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parent
36e520a2b2
commit
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3 changed files with 68 additions and 16 deletions
1
Cargo.lock
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1
Cargo.lock
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@ -250,6 +250,7 @@ dependencies = [
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"chrono 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
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"diesel 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
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"env_logger 0.5.6 (registry+https://github.com/rust-lang/crates.io-index)",
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"futures 0.1.21 (registry+https://github.com/rust-lang/crates.io-index)",
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"log 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
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"r2d2 0.8.2 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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@ -11,3 +11,4 @@ diesel = { version = "1.2", features = ["postgres", "chrono", "r2d2"]}
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chrono = "0.4"
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log = "0.4"
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r2d2 = "*"
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futures = "*"
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82
src/main.rs
82
src/main.rs
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@ -1,33 +1,83 @@
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#[macro_use]
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extern crate diesel;
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#[macro_use]
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extern crate log;
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extern crate chrono;
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extern crate actix;
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extern crate actix_web;
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extern crate env_logger;
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extern crate r2d2;
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extern crate futures;
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pub mod schema;
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pub mod models;
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pub mod db;
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use actix::prelude::*;
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use actix_web::*;
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use diesel::prelude::*;
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use diesel::pg::PgConnection;
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use diesel::r2d2::{ConnectionManager, Pool};
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use std::env;
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use db::*;
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use futures::Future;
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use models::Thread;
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fn connect_db() -> PgConnection {
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let db_url = env::var("DATABASE_URL")
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.expect("DATABASE_URL must be set");
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/// Represents the state carried by the web server actors.
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struct AppState {
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db: Addr<Syn, DbExecutor>,
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}
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PgConnection::establish(&db_url)
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.expect(&format!("Error connecting to {}", db_url))
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/// Really inefficient renderer example!
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fn render_threads(threads: Vec<Thread>) -> String {
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let mut res = String::new();
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for thread in threads {
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res.push_str(&format!("Subject: {}\n", thread.title));
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res.push_str(&format!("Posted at: {}\n\n", thread.posted));
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res.push_str(&format!("{}\n", thread.body));
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res.push_str("-------------------------------");
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}
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res
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}
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fn forum_index(req: HttpRequest<AppState>) -> FutureResponse<HttpResponse> {
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req.state().db.send(ListThreads)
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.from_err()
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.and_then(|res| match res {
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Ok(threads) => Ok(HttpResponse::from(render_threads(threads))),
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Err(err) => {
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error!("Error loading threads: {}", err);
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Ok(HttpResponse::InternalServerError().into())
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}
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})
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.responder()
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}
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fn main() {
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use schema::threads::dsl::*;
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use models::*;
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env_logger::init();
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let conn = connect_db();
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let result: Vec<Thread> = threads
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.load::<Thread>(&conn)
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.expect("Error loading threads");
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info!("Welcome to Converse! Hold on tight while we're getting ready.");
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let sys = actix::System::new("converse");
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for thread in result {
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println!("Subject: {}\nPosted: {}\n", thread.title, thread.posted);
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println!("{}", thread.body);
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}
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info!("Initialising database connection pool ...");
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let db_url = env::var("DATABASE_URL")
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.expect("DATABASE_URL must be set");
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let manager = ConnectionManager::<PgConnection>::new(db_url);
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let pool = Pool::builder().build(manager).expect("Failed to initialise DB pool");
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let db_addr = SyncArbiter::start(2, move || DbExecutor(pool.clone()));
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info!("Initialising HTTP server ...");
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server::new(move || {
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App::with_state(AppState { db: db_addr.clone() })
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.middleware(middleware::Logger::default())
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.route("/", http::Method::GET, &forum_index)
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}).bind("127.0.0.1:4567").unwrap().start();
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let _ = sys.run();
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}
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