Refactor some code

Cargo.lock

@@ -1961,6 +1961,7 @@ dependencies = [
  "sequoia-openpgp",
  "serde",
  "serde_json",
+ "thiserror",
  "tokio",
 ]
 

Cargo.toml

@@ -13,4 +13,5 @@ sequoia-net = "0.27.0"
 sequoia-openpgp = "1.14.0"
 serde = { version = "1.0.160", features = ["derive"] }
 serde_json = "1.0.96"
+thiserror = "1.0.40"
 tokio = { version = "1.27.0", features = ["time"] }

src/confirmation.rs

@@ -1,3 +1,4 @@
+use crate::errors::Error;
 use crate::management::{delete_key, Action, Pending};
 use crate::utils::{get_email_from_cert, parse_pem};
 use crate::PENDING;
@@ -6,26 +7,42 @@ use crate::{pending_path, PATH, VARIANT};
 use std::fs;
 use std::path::Path;
 
-pub fn confirm_action(token: &str) {
+pub fn confirm_action(token: &str) -> Result<(), Error> {
     let pending_path = pending_path!().join(token);
-    let key: Pending = serde_json::from_str(&fs::read_to_string(&pending_path).unwrap()).unwrap();
+    let data = if pending_path.exists() {
+        match fs::read_to_string(&pending_path) {
+            Ok(data) => data,
+            Err(_) => return Err(Error::Inaccessible),
+        }
+    } else {
+        return Err(Error::MissingPath);
+    };
+    let key = match serde_json::from_str::<Pending>(&data) {
+        Ok(key) => key,
+        Err(_) => return Err(Error::ParseStored),
+    };
     match key.action() {
         Action::Add => {
-            let cert = parse_pem(key.data());
-            let domain = get_email_from_cert(&cert)
-                .split('@')
-                .last()
-                .unwrap()
-                .to_owned();
-            sequoia_net::wkd::insert(PATH, domain, VARIANT, &cert).unwrap();
+            let cert = parse_pem(key.data())?;
+            let domain = match get_email_from_cert(&cert)?.split('@').last() {
+                Some(domain) => domain.to_string(),
+                None => return Err(Error::MalformedMail),
+            };
+            match sequoia_net::wkd::insert(PATH, domain, VARIANT, &cert) {
+                Ok(_) => (),
+                Err(_) => return Err(Error::AddingKey),
+            }
         }
-        Action::Delete => delete_key(key.data()),
+        Action::Delete => delete_key(key.data())?,
+    }
+    match fs::remove_file(&pending_path) {
+        Ok(_) => Ok(()),
+        Err(_) => Err(Error::Inaccessible),
     }
-    fs::remove_file(&pending_path).unwrap();
 }
 
-pub fn send_confirmation_email(email: &str, action: Action, token: &str) {
-    println!("Email sent to {}", email);
-    println!("Action: {:?}", action);
-    println!("Token: {}", token);
+pub fn send_confirmation_email(email: &str, action: &Action, token: &str) {
+    println!("Email sent to {email}");
+    println!("Action: {action:?}");
+    println!("Token: {token}");
 }

src/errors.rs

@@ -0,0 +1,35 @@
+use actix_web::http::StatusCode;
+use thiserror::Error;
+
+#[derive(Error, Debug)]
+pub enum Error {
+    #[error("Error while parsing cert")]
+    ParseCert,
+    #[error("Error while parsing E-Mail")]
+    ParseMail,
+    #[error("Error while parsing stored data")]
+    ParseStored,
+    #[error("No E-Mail found in the certificate")]
+    MissingMail,
+    #[error("The E-Mail is malformed")]
+    MalformedMail,
+    #[error("Error while serializing data")]
+    SerializeData,
+    #[error("Error while deserializing data")]
+    DeserializeData,
+    #[error("File or directory does not exist")]
+    MissingPath,
+    #[error("The file is inaccessible")]
+    Inaccessible,
+    #[error("Error while adding a key to the wkd")]
+    AddingKey,
+}
+
+impl actix_web::ResponseError for Error {
+    fn status_code(&self) -> actix_web::http::StatusCode {
+        match self {
+            Self::MissingPath => StatusCode::from_u16(404).unwrap(),
+            _ => StatusCode::from_u16(500).unwrap(),
+        }
+    }
+}

src/main.rs

@@ -1,4 +1,5 @@
 mod confirmation;
+mod errors;
 mod management;
 mod utils;
 
@@ -40,7 +41,7 @@ async fn main() -> std::io::Result<()> {
         let mut metronome = time::interval(time::Duration::from_secs(60 * 60 * 3));
         loop {
             metronome.tick().await;
-            clean_stale(MAX_AGE);
+            clean_stale(MAX_AGE).unwrap();
         }
     });
     HttpServer::new(|| App::new().service(submit).service(confirm).service(delete))
@@ -51,24 +52,24 @@ async fn main() -> std::io::Result<()> {
 
 #[post("/api/submit")]
 async fn submit(pem: web::Form<Pem>) -> Result<String> {
-    let cert = parse_pem(&pem.key);
-    let email = get_email_from_cert(&cert);
+    let cert = parse_pem(&pem.key)?;
+    let email = get_email_from_cert(&cert)?;
     let token = gen_random_token();
-    store_pending_addition(pem.key.to_owned(), &token);
-    send_confirmation_email(&email, Action::Add, &token);
+    store_pending_addition(pem.key.clone(), &token)?;
+    send_confirmation_email(&email, &Action::Add, &token);
     Ok(String::from("OK!"))
 }
 
 #[get("/api/confirm/{data}")]
 async fn confirm(token: web::Path<Token>) -> Result<String> {
-    confirm_action(&token.data);
+    confirm_action(&token.data)?;
     Ok(String::from("OK!"))
 }
 
 #[get("/api/delete/{address}")]
 async fn delete(email: web::Path<Email>) -> Result<String> {
     let token = gen_random_token();
-    store_pending_deletion(email.address.to_owned(), &token);
-    send_confirmation_email(&email.address, Action::Delete, &token);
+    store_pending_deletion(email.address.clone(), &token)?;
+    send_confirmation_email(&email.address, &Action::Delete, &token);
     Ok(String::from("OK!"))
 }

src/management.rs

@@ -1,3 +1,4 @@
+use crate::errors::Error;
 use crate::utils::get_user_file_path;
 use crate::PENDING;
 use crate::{pending_path, PATH};
@@ -19,65 +20,86 @@ pub struct Pending {
     timestamp: i64,
 }
 impl Pending {
-    pub fn build_add(pem: String) -> Pending {
+    pub fn build_add(pem: String) -> Self {
         let timestamp = Utc::now().timestamp();
-        Pending {
+        Self {
             action: Action::Add,
             data: pem,
             timestamp,
         }
     }
-    pub fn build_delete(email: String) -> Pending {
+    pub fn build_delete(email: String) -> Self {
         let timestamp = Utc::now().timestamp();
-        Pending {
+        Self {
             action: Action::Delete,
             data: email,
             timestamp,
         }
     }
-    pub fn action(&self) -> &Action {
+    pub const fn action(&self) -> &Action {
         &self.action
     }
     pub fn data(&self) -> &str {
         &self.data
     }
-    pub fn timestamp(&self) -> i64 {
+    pub const fn timestamp(&self) -> i64 {
         self.timestamp
     }
 }
 
-fn store_pending(pending: Pending, token: &str) {
-    let serialized = serde_json::to_string(&pending).unwrap();
-    fs::create_dir_all(pending_path!()).unwrap();
-    fs::write(pending_path!().join(token), serialized).unwrap();
-}
-
-pub fn store_pending_addition(pem: String, token: &str) {
-    let data = Pending::build_add(pem);
-    store_pending(data, token);
-}
-
-pub fn store_pending_deletion(email: String, token: &str) {
-    let data = Pending::build_delete(email);
-    store_pending(data, token);
-}
-
-pub fn clean_stale(max_age: i64) {
-    for path in fs::read_dir(pending_path!()).unwrap() {
-        let file_path = path.unwrap().path();
-        let key: Pending = serde_json::from_str(&fs::read_to_string(&file_path).unwrap()).unwrap();
-        let now = Utc::now().timestamp();
-        if now - key.timestamp() > max_age {
-            fs::remove_file(&file_path).unwrap();
-            println!(
-                "Deleted {}, since it was stale",
-                &file_path.to_str().unwrap()
-            );
-        }
+fn store_pending(pending: &Pending, token: &str) -> Result<(), Error> {
+    match serde_json::to_string(pending) {
+        Ok(serialized) => match fs::write(pending_path!().join(token), serialized) {
+            Ok(_) => Ok(()),
+            Err(_) => Err(Error::Inaccessible),
+        },
+        Err(_) => Err(Error::SerializeData),
     }
 }
 
-pub fn delete_key(email: &str) {
-    let path = Path::new(PATH).join(get_user_file_path(email));
-    fs::remove_file(path).unwrap();
+pub fn store_pending_addition(pem: String, token: &str) -> Result<(), Error> {
+    let data = Pending::build_add(pem);
+    store_pending(&data, token)?;
+    Ok(())
+}
+
+pub fn store_pending_deletion(email: String, token: &str) -> Result<(), Error> {
+    let data = Pending::build_delete(email);
+    store_pending(&data, token)?;
+    Ok(())
+}
+
+pub fn clean_stale(max_age: i64) -> Result<(), Error> {
+    for path in fs::read_dir(pending_path!()).unwrap().flatten() {
+        let file_path = path.path();
+        if file_path.exists() {
+            match fs::read_to_string(&file_path) {
+                Ok(data) => match serde_json::from_str::<Pending>(&data) {
+                    Ok(key) => {
+                        let now = Utc::now().timestamp();
+                        if now - key.timestamp() > max_age {
+                            if fs::remove_file(&file_path).is_err() {
+                                return Err(Error::Inaccessible);
+                            }
+                            println!(
+                                "Deleted {}, since it was stale",
+                                &file_path.to_str().unwrap()
+                            );
+                        }
+                    }
+                    Err(_) => return Err(Error::DeserializeData),
+                },
+                Err(_) => return Err(Error::Inaccessible),
+            }
+        }
+    }
+    Ok(())
+}
+
+pub fn delete_key(email: &str) -> Result<(), Error> {
+    let path = Path::new(PATH).join(get_user_file_path(email)?);
+    match fs::remove_file(path) {
+        Ok(_) => Ok(()),
+        Err(_) => Err(Error::Inaccessible),
+    }
 }

src/utils.rs

@@ -1,3 +1,4 @@
+use crate::errors::Error;
 use crate::VARIANT;
 
 use rand::{distributions::Alphanumeric, thread_rng, Rng};
@@ -12,8 +13,11 @@ macro_rules! pending_path {
     };
 }
 
-pub fn parse_pem(data: &str) -> Cert {
-    sequoia_openpgp::Cert::from_bytes(data.as_bytes()).unwrap()
+pub fn parse_pem(data: &str) -> Result<Cert, Error> {
+    match sequoia_openpgp::Cert::from_bytes(data.as_bytes()) {
+        Ok(data) => Ok(data),
+        Err(_) => Err(Error::ParseCert),
+    }
 }
 
 pub fn gen_random_token() -> String {
@@ -21,10 +25,25 @@ pub fn gen_random_token() -> String {
     (0..10).map(|_| rng.sample(Alphanumeric) as char).collect()
 }
 
-pub fn get_email_from_cert(cert: &Cert) -> String {
-    cert.userids().next().unwrap().email().unwrap().unwrap()
+pub fn get_email_from_cert(cert: &Cert) -> Result<String, Error> {
+    match cert.userids().next() {
+        Some(data) => match data.email() {
+            Ok(data) => match data {
+                Some(data) => Ok(data),
+                None => Err(Error::MissingMail),
+            },
+            Err(_) => Err(Error::ParseMail),
+        },
+        None => Err(Error::ParseCert),
+    }
 }
 
-pub fn get_user_file_path(email: &str) -> PathBuf {
-    Url::from(email).unwrap().to_file_path(VARIANT).unwrap()
+pub fn get_user_file_path(email: &str) -> Result<PathBuf, Error> {
+    match Url::from(email) {
+        Ok(data) => match data.to_file_path(VARIANT) {
+            Ok(data) => Ok(data),
+            Err(_) => Err(Error::ParseMail),
+        },
+        Err(_) => Err(Error::ParseMail),
+    }
 }