first commit

.dockerignore

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+# Generated by Cargo
+# will have compiled files and executables
+debug/
+target/
+
+# Remove Cargo.lock from gitignore if creating an executable, leave it for libraries
+# More information here https://doc.rust-lang.org/cargo/guide/cargo-toml-vs-cargo-lock.html
+Cargo.lock
+
+# These are backup files generated by rustfmt
+**/*.rs.bk
+
+# MSVC Windows builds of rustc generate these, which store debugging information
+*.pdb
+
+.vscode
+
+config.yaml

.gitignore

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+# Generated by Cargo
+# will have compiled files and executables
+debug/
+target/
+
+# Remove Cargo.lock from gitignore if creating an executable, leave it for libraries
+# More information here https://doc.rust-lang.org/cargo/guide/cargo-toml-vs-cargo-lock.html
+Cargo.lock
+
+# These are backup files generated by rustfmt
+**/*.rs.bk
+
+# MSVC Windows builds of rustc generate these, which store debugging information
+*.pdb
+
+.vscode

Cargo.toml

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+[package]
+name = "rust-rocket-counter-api"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+rocket = "0.5.0-rc.2"
+serde_yaml = "0.9.33"
+

LICENSE

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+MIT License
+
+Copyright (c) 2024 Gusti Adli Anshari
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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+simple counter api written in rust used as hands-on docker

config.yaml

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+username: John Mayer

src/main.rs

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+use rocket::{get, launch, routes};
+use rocket::State;
+use std::env;
+use std::fs::File;
+use std::io::Read;
+use std::sync::{Arc, Mutex};
+
+struct Counter {
+    value: i32,
+    username: String,
+}
+
+#[get("/")]
+fn index(counter: &State<Arc<Mutex<Counter>>>) -> String {
+    let counter_lock = counter.lock().unwrap();
+    format!("Hi {}!\nCounter: {}", counter_lock.username, counter_lock.value)
+}
+
+#[get("/add")]
+fn increment(counter: &State<Arc<Mutex<Counter>>>) -> String {
+    let mut counter_lock = counter.lock().unwrap();
+    counter_lock.value += 1;
+    format!("Hi {}!\nIncremented!\nNew value: {}", counter_lock.username, counter_lock.value)
+}
+
+#[get("/reset")]
+fn reset(counter: &State<Arc<Mutex<Counter>>>) -> String {
+    let mut counter_lock = counter.lock().unwrap();
+    counter_lock.value = 0;
+    format!("Hi {}!\nReset Success!\nCounter: {}", counter_lock.username, counter_lock.value)
+}
+
+#[launch]
+fn rocket() -> _ {
+    let config_path: String = match env::var("CONFIG_PATH") {
+        Ok(val) => val,
+        Err(_) => "config.yaml".to_string(),
+    };
+    println!("Using config file: {config_path}");
+
+    let mut f: File = std::fs::File::open(config_path).expect("Can't open config.yaml");
+
+    let mut str: String = String::new();
+    f.read_to_string(&mut str).expect("Can't read config.yaml");
+
+    let data: serde_yaml::Value = serde_yaml::from_str(&str).expect("Can't parse config.yaml");
+    let username: String = data["username"]
+        .as_str()
+        .map(|s| s.to_string())
+        .expect("Can't find username in config.yaml");
+
+    rocket::build()
+        .manage(Arc::new(Mutex::new(Counter { value: 0, username: username })))
+        .mount("/", routes![index, increment, reset])
+}