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server.rs
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server.rs
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use std::collections::HashMap;
use std::fs::File;
use std::io::BufReader;
use std::io::prelude::*;
use std::net::Ipv4Addr;
use std::sync::Arc;
use std::sync::RwLock;
use hyper::header::{*};
use nickel::{*, HttpRouter, Middleware, MiddlewareResult, Nickel, Options, Request, Response, StaticFilesHandler};
use nickel::hyper::method::Method;
use nickel::status::StatusCode;
use crate::configuration::Configuration;
use crate::kvstore::KvStore;
use crate::logger::{Logger, LogLevel};
pub struct Server {
endpoint: String,
use_tls: bool
}
#[derive(Serialize, Deserialize, Debug)]
struct ErrorMessage {
message: String,
details: Option<String>
}
// TODO: move into implementation
fn handler_vuejs<'a>(_: &mut Request, res: Response<'a>) -> MiddlewareResult<'a> {
let mut data = HashMap::<&str, &str>::new();
data.insert("name", "Alex");
res.render("webui/dist/index.tpl", &data)
}
fn handler_logger<'a, D>(request: &mut Request<D>, response: Response<'a, D>) -> MiddlewareResult<'a, D> {
crate::logger::print(&LogLevel::Information, format!("{} {}", request.origin.method, request.origin.uri).as_ref());
response.next_middleware()
}
struct KvStoreMiddleware {
method: hyper::method::Method,
store: Arc<RwLock<KvStore>>,
}
impl<D> Middleware<D> for KvStoreMiddleware {
fn invoke<'mw, 'conn>(&self, req: &mut Request<'mw, 'conn, D>, mut res: Response<'mw, D>) -> MiddlewareResult<'mw, D> {
// TODO: validate JWT token
// Get the request body and retrieve the KV store
let store = &*self.store.write().unwrap();
let mut buffer = Vec::new();
let body_size = req.origin.read_to_end(&mut buffer).unwrap();
// Define some response headers
res.set(Server("Lucid 0.1.0".to_string()));
match self.method {
Method::Head => match req.param("key") {
Some(key) => match &store.get(key.to_string()) {
Some(_) => {
res.set(StatusCode::Ok);
res.send("")
},
None => {
res.set(StatusCode::NotFound);
res.send("")
}
},
_ => {
res.set(StatusCode::BadRequest).set(MediaType::Json);
res.send(serde_json::to_string_pretty(&ErrorMessage { message: "Missing key parameter.".to_string(), details: None }).unwrap())
}
},
Method::Put => {
if body_size == 0 {
res.set(StatusCode::BadRequest).set(MediaType::Json);
return res.send(serde_json::to_string_pretty(&ErrorMessage { message: "Missing request body.".to_string(), details: None }).unwrap());
}
match req.param("key") {
Some(key) => if buffer.len() < 7340032 {
store.set(key.to_string(), buffer);
res.set(StatusCode::Ok);
res.send("")
} else {
res.set(StatusCode::BadRequest).set(MediaType::Json);
res.send(serde_json::to_string_pretty(&ErrorMessage { message: "The maximum allowed value size is 7 Mb.".to_string(), details: None }).unwrap())
},
_ => {
res.set(StatusCode::BadRequest).set(MediaType::Json);
res.send(serde_json::to_string_pretty(&ErrorMessage { message: "Missing key parameter.".to_string(), details: None }).unwrap())
}
}
},
Method::Get => match req.param("key") {
Some(key) => match store.get(key.to_string()) {
Some(value) => {
res.set(StatusCode::Ok).set(MediaType::Txt);
res.send(value)
},
None => {
res.set(StatusCode::NotFound).set(MediaType::Json);
res.send(serde_json::to_string_pretty(&ErrorMessage { message: "The specified key does not exists.".to_string(), details: None }).unwrap())
}
},
_ => {
res.set(StatusCode::BadRequest).set(MediaType::Json);
res.send(serde_json::to_string_pretty(&ErrorMessage { message: "Missing key parameter.".to_string(), details: None }).unwrap())
}
},
Method::Delete => match req.param("key") {
Some(key) => {
store.drop(key.to_string());
res.set(StatusCode::Ok);
res.send("")
},
_ => {
res.set(StatusCode::BadRequest).set(MediaType::Json);
res.send(serde_json::to_string_pretty(&ErrorMessage { message: "Missing key parameter.".to_string(), details: None }).unwrap())
}
},
_ => {
res.set(StatusCode::MethodNotAllowed).set(MediaType::Json);
res.send(serde_json::to_string_pretty(&ErrorMessage { message: "Method not allowed, maybe in the future :)".to_string(), details: None }).unwrap())
}
}
}
}
impl Server
{
pub fn new() -> Server
{
Server {
endpoint: format!("{}:7021", Ipv4Addr::LOCALHOST),
use_tls: false,
}
}
pub fn configure(&mut self, configuration: &Configuration) {
self.endpoint = configuration.endpoint.to_owned().replace("\"", "");
self.use_tls = configuration.use_tls;
}
fn router_webui(&self) -> nickel::Router {
let mut router = Nickel::router();
router.get("/", handler_vuejs);
router
}
pub fn run(&self) {
let server_options = Options::default()
.thread_count(None) // TODO: [Optimisation] improve this
.output_on_listen(false);
let mut server = Nickel::with_options(server_options);
let store = Arc::new(RwLock::new(KvStore::default()));
server.utilize(handler_logger);
server.utilize(StaticFilesHandler::new("assets/"));
server.utilize(StaticFilesHandler::new("webui/dist"));
server.utilize(self.router_webui());
// API Endpoints
server.add_route(Method::Head, "/api/kv/:key", KvStoreMiddleware { method: Method::Head, store: store.clone() });
server.put("/api/kv/:key", KvStoreMiddleware { method: Method::Put, store: store.clone() });
server.get("/api/kv/:key", KvStoreMiddleware { method: Method::Get, store: store.clone() });
server.patch("/api/kv/:key", KvStoreMiddleware { method: Method::Patch, store: store.clone() });
server.delete("/api/kv/:key", KvStoreMiddleware { method: Method::Delete, store: store.clone() });
// TODO: Implement HTTPS (https://github.com/nickel-org/nickel.rs/blob/master/examples/https.rs)
match server.listen(&self.endpoint) {
Ok(instance) => {
// TODO: try using server.log and getting owner
&self.log(LogLevel::Information, format!("Running Lucid server on {endpoint} | PID: {pid}", endpoint = instance.socket(), pid = std::process::id()).as_str(), None);
&self.log(LogLevel::Information, format!("Lucid API Endpoint: {scheme}://{endpoint}/api/", scheme = match self.use_tls {
true => "https",
false => "http"
}, endpoint = instance.socket()).as_str(), None);
&self.log(LogLevel::Information, "Use Ctrl+C to stop the server.", None);
}
Err(err) => {
&self.log(LogLevel::Error, "Unable to run Lucid server", Some(Box::leak(err).description()));
}
}
// if self.use_tls {
// server.listen_https()
// }
}
}