mirror of https://github.com/rwf2/Rocket.git
82 lines
2.0 KiB
Rust
82 lines
2.0 KiB
Rust
#![feature(proc_macro_hygiene)]
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#[macro_use] extern crate rocket;
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#[macro_use] extern crate rocket_contrib;
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#[macro_use] extern crate serde_derive;
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#[cfg(test)] mod tests;
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use std::sync::Mutex;
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use std::collections::HashMap;
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use rocket::State;
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use rocket_contrib::json::{Json, JsonValue};
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// The type to represent the ID of a message.
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type ID = usize;
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// We're going to store all of the messages here. No need for a DB.
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type MessageMap = Mutex<HashMap<ID, String>>;
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#[derive(Serialize, Deserialize)]
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struct Message {
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id: Option<ID>,
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contents: String
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}
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// TODO: This example can be improved by using `route` with multiple HTTP verbs.
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#[post("/<id>", format = "json", data = "<message>")]
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fn new(id: ID, message: Json<Message>, map: State<'_, MessageMap>) -> JsonValue {
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let mut hashmap = map.lock().expect("map lock.");
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if hashmap.contains_key(&id) {
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json!({
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"status": "error",
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"reason": "ID exists. Try put."
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})
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} else {
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hashmap.insert(id, message.0.contents);
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json!({ "status": "ok" })
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}
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}
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#[put("/<id>", format = "json", data = "<message>")]
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fn update(id: ID, message: Json<Message>, map: State<'_, MessageMap>) -> Option<JsonValue> {
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let mut hashmap = map.lock().unwrap();
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if hashmap.contains_key(&id) {
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hashmap.insert(id, message.0.contents);
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Some(json!({ "status": "ok" }))
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} else {
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None
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}
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}
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#[get("/<id>", format = "json")]
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fn get(id: ID, map: State<'_, MessageMap>) -> Option<Json<Message>> {
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let hashmap = map.lock().unwrap();
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hashmap.get(&id).map(|contents| {
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Json(Message {
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id: Some(id),
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contents: contents.clone()
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})
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})
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}
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#[catch(404)]
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fn not_found() -> JsonValue {
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json!({
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"status": "error",
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"reason": "Resource was not found."
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})
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}
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fn rocket() -> rocket::Rocket {
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rocket::ignite()
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.mount("/message", routes![new, update, get])
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.register(catchers![not_found])
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.manage(Mutex::new(HashMap::<ID, String>::new()))
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}
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fn main() {
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rocket().launch();
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}
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