- extended API Endpoints

- restructured API paths
- added JWT authorization
- added login function (without authentication)

Cargo.toml

@@ -11,7 +11,10 @@ serde = "1.0"
 diesel = { version = "1.4", features = ["postgres", "serde_json"] }
 reqwest = "0.11"
 quickxml_to_serde = "0.4"
-serde_json = "1.0.64"
+serde_json = "1.0"
+jsonwebtoken = "7.2"
+time = "0.2"
+
 
 [dependencies.serde_derive]
 version = "1.0"

Rocket.toml

@@ -3,3 +3,10 @@ port = 3000
 
 [debug.databases]
 timetable = { url = "postgres://meincantor:meincantor_password@localhost/meincantor_db" }
+
+[release]
+address = "192.168.0.12"
+port = 3000
+
+[release.databases]
+timetable = { url = "postgres://meincantor:meincantor_password@localhost/meincantor_db" }

src/main.rs

@@ -6,6 +6,7 @@ mod schema;
 
 extern crate serde;
 
+
 use rocket::serde::json::{Json, json};
 use crate::schema::timetable;
 use diesel::{Queryable, Insertable};
@@ -15,6 +16,13 @@ use reqwest;
 use quickxml_to_serde::{xml_string_to_json, Config};
 extern crate serde_json;
 mod config;
+use jsonwebtoken::{encode, decode, Header, Validation, EncodingKey, DecodingKey};
+use std::time::{SystemTime, Duration, UNIX_EPOCH};
+use time::OffsetDateTime;
+use rocket::http::Status;
+use rocket::request::{self, Outcome, Request, FromRequest};
+use rocket::fs::{FileServer, relative};
+
 
 #[database("timetable")]
 struct DbConn(PgConnection);
@@ -34,6 +42,102 @@ struct TimetableData {
     courses: Vec<rocket::serde::json::Value>
 }
 
+#[derive(Debug, Serialize, Deserialize)]
+struct Credentials {
+    user: String,
+    password: String,
+    devid: String
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+enum Roles {
+    Student,
+    Teacher,
+    Admin
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+struct Claims {
+    iss: String,
+    user: String,
+    roles: Vec<Roles>,
+    // permissions: Vec<String>,
+    blacklist: Vec<String>,
+    whitelist: Vec<String>,
+    jid: String,
+    exp: u64
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+struct Token {
+    token: String
+}
+
+struct ApiKey<'r>(&'r str);
+
+#[derive(Debug)]
+enum ApiKeyError {
+    Missing,
+    Invalid,
+}
+
+#[rocket::async_trait]
+impl<'r> FromRequest<'r> for ApiKey<'r> {
+    type Error = ApiKeyError;
+
+    async fn from_request(req: &'r Request<'_>) -> Outcome<Self, Self::Error> {
+        /// Returns true if `key` is a valid API key string.
+        fn is_valid(key: &str) -> bool {
+            let token = decode::<Claims>(&key, &DecodingKey::from_secret(config::JWT_SECRET.as_ref()), &Validation::default());
+            token.is_ok()
+        }
+
+        fn has_permissions(key: &str, uri: &str) -> bool {
+            let student_permissions = vec![String::from("/classes"), String::from("/timetable")];
+            let teacher_permissions = vec![String::from("/classes"), String::from("/timetable"), String::from("/t_timetable")];
+            let token = decode::<Claims>(&key, &DecodingKey::from_secret(config::JWT_SECRET.as_ref()), &Validation::default());
+            println!("{:?}", token);
+            let mut token = token.unwrap();
+            let mut permissions = Vec::new();
+            for role in token.claims.roles.iter() {
+                match role {
+                    Roles::Admin => permissions.push(String::from("all")),
+                    Roles::Student => permissions.extend(student_permissions.iter().cloned()),
+                    Roles::Teacher => permissions.extend(teacher_permissions.iter().cloned()),
+                    _ => permissions.push(String::from("none"))
+                }
+            }
+            permissions.contains(&String::from(uri)) | permissions.contains(&String::from("all")) | &token.claims.whitelist.contains(&String::from(uri)) && !token.claims.blacklist.contains(&String::from(uri))
+        }
+
+        match req.headers().get_one("x-api-key") {
+            None => Outcome::Failure((Status::Unauthorized, ApiKeyError::Missing)),
+            Some(key) if is_valid(key) && has_permissions(key, req.uri().path().as_str()) => Outcome::Success(ApiKey(key)),
+            Some(_) => Outcome::Failure((Status::BadRequest, ApiKeyError::Invalid)),
+        }
+    }
+}
+
+#[post("/", data="<credentials>")]
+fn login(credentials: Json<Credentials>) -> Json<Token> {
+    let credentials = credentials.into_inner();
+    let system_time = OffsetDateTime::now_utc();
+    let datetime = system_time.format("%d/%m/%Y %T");
+    let my_claims = Claims {
+        iss: String::from("Georg-Cantor-Gymnasium Halle(Saale)"),
+        user: credentials.user,
+        roles: vec![Roles::Student, Roles::Admin],
+        // permissions: vec![""]
+        blacklist: vec![String::from("/classes")],
+        whitelist: vec![String::from("/hello/sensitive")],
+        jid: String::from(credentials.devid + "@" + &datetime),
+        exp: SystemTime::now().duration_since(UNIX_EPOCH).expect("Time went backwards").as_secs() + Duration::from_secs(31536000).as_secs()
+    };
+    println!("{:?}", SystemTime::now());
+    let token = encode(&Header::default(), &my_claims, &EncodingKey::from_secret(config::JWT_SECRET.as_ref()));
+    Json(Token { token: token.unwrap() })
+}
+
 async fn get_timetable_xml() -> serde_json::value::Value {
     let client = reqwest::Client::new();
     let resp = client
@@ -57,7 +161,7 @@ async fn get_timetable_xml_data() -> Vec<serde_json::value::Value> {
 }
 
 #[get("/")]
-async fn get_timetable(_conn: DbConn) -> Json<Vec<Timetable>> {
+async fn get_timetable(_conn: DbConn, _key: ApiKey<'_>) -> Json<Vec<Timetable>> {
     let xml = get_timetable_xml().await;
     let classes = get_timetable_xml_data().await;
     let mut timetable: Vec<Timetable> = Vec::new();
@@ -106,7 +210,7 @@ async fn get_timetable(_conn: DbConn) -> Json<Vec<Timetable>> {
 }
 
 #[get("/<class>")]
-async fn get_class_timetable(_conn: DbConn, class: String) -> Json<TimetableData> {
+async fn get_class_timetable(_conn: DbConn, class: String, _key: ApiKey<'_>) -> Json<TimetableData> {
     let classes = get_timetable_xml_data().await;
     let courses: Vec<rocket::serde::json::Value> = Vec::new();
     let mut response = TimetableData {
@@ -140,8 +244,8 @@ async fn get_class_timetable(_conn: DbConn, class: String) -> Json<TimetableData
     Json::from(response)
 }
 
-#[get("/classes")]
+#[get("/")]
-async fn get_classes() -> Json<Vec<String>> {
+async fn get_classes(_key: ApiKey<'_>) -> Json<Vec<String>> {
     let classes = get_timetable_xml_data().await;
     let mut class_list: Vec<String> = Vec::new();
     for i in classes.iter() {
@@ -163,10 +267,18 @@ fn hello_name(name: String) -> String {
     format!("Hello, {}!", name)
 }
 
+#[get("/sensitive")]
+fn sensitive(key: ApiKey<'_>) -> &'static str {
+    "Sensitive data."
+}
+
 #[launch]
 fn rocket() -> _ {
     rocket::build()
         .attach(DbConn::fairing())
-        .mount("/hello", routes![hello, hello_name])
+        .mount("/", FileServer::from(relative!("static")))
-        .mount("/timetable", routes![get_timetable, get_class_timetable, get_classes])
+        .mount("/login", routes![login])
+        .mount("/hello", routes![hello, hello_name, sensitive])
+        .mount("/api/timetable", routes![get_timetable, get_class_timetable])
+        .mount("/api/classes", routes![get_classes])
 }

static/index.html

@@ -0,0 +1,5 @@
+<html>
+  <body>
+    <h1>H1</h1>
+  </body>
+</html>

tutor

@@ -1 +0,0 @@
-

xml/Cargo.toml

@@ -1,8 +0,0 @@
-[package]
-name = "xml"
-version = "0.1.0"
-edition = "2018"
-
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
-
-[dependencies]

xml/src/main.rs

@@ -1,39 +0,0 @@
-
-
-use quick_xml::Reader;
-use quick_xml::events::Event;
-
-let xml = r#"<tag1 att1 = "test">
-                <tag2><!--Test comment-->Test</tag2>
-                <tag2>
-                    Test 2
-                </tag2>
-            </tag1>"#;
-
-let mut reader = Reader::from_str(xml);
-reader.trim_text(true);
-
-let mut count = 0;
-let mut txt = Vec::new();
-let mut buf = Vec::new();
-
-// The `Reader` does not implement `Iterator` because it outputs borrowed data (`Cow`s)
-loop {
-    match reader.read_event(&mut buf) {
-        Ok(Event::Start(ref e)) => {
-            match e.name() {
-                b"tag1" => println!("attributes values: {:?}",
-                                    e.attributes().map(|a| a.unwrap().value).collect::<Vec<_>>()),
-                b"tag2" => count += 1,
-                _ => (),
-            }
-        },
-        Ok(Event::Text(e)) => txt.push(e.unescape_and_decode(&reader).unwrap()),
-        Ok(Event::Eof) => break, // exits the loop when reaching end of file
-        Err(e) => panic!("Error at position {}: {:?}", reader.buffer_position(), e),
-        _ => (), // There are several other `Event`s we do not consider here
-    }
-
-    // if we don't keep a borrow elsewhere, we can clear the buffer to keep memory usage low
-    buf.clear();
-}

xml/target/.rustc_info.json

@@ -1 +0,0 @@
-{"rustc_fingerprint":6590233451751340509,"outputs":{"17598535894874457435":{"success":true,"status":"","code":0,"stdout":"rustc 1.53.0 (53cb7b09b 2021-06-17)\nbinary: rustc\ncommit-hash: 53cb7b09b00cbea8754ffb78e7e3cb521cb8af4b\ncommit-date: 2021-06-17\nhost: x86_64-unknown-linux-gnu\nrelease: 1.53.0\nLLVM version: 12.0.1\n","stderr":""},"931469667778813386":{"success":true,"status":"","code":0,"stdout":"___\nlib___.rlib\nlib___.so\nlib___.so\nlib___.a\nlib___.so\n/home/denyskon/.rustup/toolchains/stable-x86_64-unknown-linux-gnu\ndebug_assertions\nproc_macro\ntarget_arch=\"x86_64\"\ntarget_endian=\"little\"\ntarget_env=\"gnu\"\ntarget_family=\"unix\"\ntarget_feature=\"fxsr\"\ntarget_feature=\"sse\"\ntarget_feature=\"sse2\"\ntarget_os=\"linux\"\ntarget_pointer_width=\"64\"\ntarget_vendor=\"unknown\"\nunix\n","stderr":""},"2797684049618456168":{"success":false,"status":"exit status: 1","code":1,"stdout":"","stderr":"error: `-Csplit-debuginfo` is unstable on this platform\n\n"}},"successes":{}}

xml/target/CACHEDIR.TAG

@@ -1,3 +0,0 @@
-Signature: 8a477f597d28d172789f06886806bc55
-# This file is a cache directory tag created by cargo.
-# For information about cache directory tags see https://bford.info/cachedir/

xml/target/debug/.fingerprint/xml-af563bb74dd611b8/invoked.timestamp

@@ -1 +0,0 @@
-This file has an mtime of when this was started.

xml/target/debug/.fingerprint/xml-af563bb74dd611b8/output-bin-xml

@@ -1,2 +0,0 @@
-{"message":"expected item, found keyword `let`","code":null,"level":"error","spans":[{"file_name":"src/main.rs","byte_start":56,"byte_end":59,"line_start":6,"line_end":6,"column_start":1,"column_end":4,"is_primary":true,"text":[{"text":"let xml = r#\"<tag1 att1 = \"test\">","highlight_start":1,"highlight_end":4}],"label":"expected item","suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[],"rendered":"\u001b[0m\u001b[1m\u001b[38;5;9merror\u001b[0m\u001b[0m\u001b[1m: expected item, found keyword `let`\u001b[0m\n\u001b[0m \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;12m--> \u001b[0m\u001b[0msrc/main.rs:6:1\u001b[0m\n\u001b[0m  \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;12m|\u001b[0m\n\u001b[0m\u001b[1m\u001b[38;5;12m6\u001b[0m\u001b[0m \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;12m| \u001b[0m\u001b[0mlet xml = r#\"<tag1 att1 = \"test\">\u001b[0m\n\u001b[0m  \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;12m| \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;9m^^^\u001b[0m\u001b[0m \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;9mexpected item\u001b[0m\n\n"}
-{"message":"aborting due to previous error","code":null,"level":"error","spans":[],"children":[],"rendered":"\u001b[0m\u001b[1m\u001b[38;5;9merror\u001b[0m\u001b[0m\u001b[1m: aborting due to previous error\u001b[0m\n\n"}