Improve logger

src/confirmation.rs

@@ -1,42 +1,67 @@
 use chrono::Utc;
+use log::{debug, error, trace, warn};
 
 use crate::errors::Error;
 use crate::management::{delete_key, Action, Pending};
 use crate::pending_path;
 use crate::settings::{MAILER, SETTINGS};
-use crate::utils::{get_email_from_cert, parse_pem};
+use crate::utils::{get_email_from_cert, get_filename, parse_pem};
 use crate::PENDING_FOLDER;
 
 use lettre::{Message, Transport};
 use std::fs;
 use std::path::Path;
 
-pub fn confirm_action(token: &str) -> Result<(), Error> {
+pub fn confirm_action(token: &str) -> Result<(Action, String), Error> {
+    trace!("Handling token {}", token);
     let pending_path = pending_path!().join(token);
     let content = if pending_path.is_file() {
         match fs::read_to_string(&pending_path) {
             Ok(content) => content,
-            Err(_) => return Err(Error::Inaccessible),
+            Err(_) => {
+                warn!(
+                    "Token {} was requested, but can't be read to string!",
+                    token
+                );
+                return Err(Error::Inaccessible);
+            }
         }
     } else {
+        trace!("Requested token {} isn't a file", token);
         return Err(Error::MissingPending);
     };
     let key = match serde_json::from_str::<Pending>(&content) {
         Ok(key) => key,
-        Err(_) => return Err(Error::DeserializeData),
+        Err(_) => {
+            warn!("Error while deserializing token {}!", token);
+            return Err(Error::DeserializeData);
+        }
     };
     if Utc::now().timestamp() - key.timestamp() > SETTINGS.max_age {
-        match fs::remove_file(pending_path) {
-            Ok(_) => Err(Error::MissingPending),
-            Err(_) => Err(Error::Inaccessible),
+        match fs::remove_file(&pending_path) {
+            Ok(_) => {
+                debug!(
+                    "Deleted stale token {}",
+                    get_filename(&pending_path).unwrap()
+                );
+                Err(Error::MissingPending)
+            }
+            Err(_) => {
+                warn!("Stale token {} can't be deleted!", token);
+                Err(Error::Inaccessible)
+            }
         }
     } else {
-        match key.action() {
+        let address = match key.action() {
             Action::Add => {
                 let cert = parse_pem(key.data())?;
-                let domain = match get_email_from_cert(&cert)?.split('@').last() {
+                let email = get_email_from_cert(&cert)?;
+                let domain = match email.split('@').last() {
                     Some(domain) => domain.to_string(),
-                    None => return Err(Error::ParseEmail),
+                    None => {
+                        warn!("Error while parsing email's domain in token {}", token);
+                        return Err(Error::ParseEmail);
+                    }
                 };
                 match sequoia_net::wkd::insert(
                     &SETTINGS.root_folder,
@@ -44,28 +69,54 @@ pub fn confirm_action(token: &str) -> Result<(), Error> {
                     SETTINGS.variant,
                     &cert,
                 ) {
-                    Ok(_) => (),
-                    Err(_) => return Err(Error::AddingKey),
+                    Ok(_) => email,
+                    Err(_) => {
+                        warn!("Unable to create a wkd entry for token {}", token);
+                        return Err(Error::AddingKey);
                     }
                 }
-            Action::Delete => delete_key(key.data())?,
             }
+            Action::Delete => match delete_key(key.data()) {
+                Ok(_) => key.data().to_owned(),
+                Err(error) => {
+                    warn!("Unable to delete key for user {}", key.data());
+                    return Err(error);
+                }
+            },
+        };
+        debug!("Token {} was confirmed", token);
         match fs::remove_file(&pending_path) {
-            Ok(_) => Ok(()),
-            Err(_) => Err(Error::Inaccessible),
+            Ok(_) => {
+                trace!(
+                    "Deleted confirmed token {}",
+                    pending_path.file_name().unwrap().to_str().unwrap()
+                );
+                Ok((*key.action(), address))
+            }
+            Err(_) => {
+                warn!("Unable to delete confirmed token {}", token);
+                Err(Error::Inaccessible)
+            }
         }
     }
 }
 
-pub fn send_confirmation_email(email: &str, action: &Action, token: &str) -> Result<(), Error> {
+pub fn send_confirmation_email(address: &str, action: &Action, token: &str) -> Result<(), Error> {
+    debug!("Sending email to {}", address);
     let email = Message::builder()
         .from(match SETTINGS.mail_settings.mail_from.parse() {
             Ok(mailbox) => mailbox,
-            Err(_) => panic!("Unable to parse the email in the settings!"),
+            Err(_) => {
+                error!("Unable to parse the email in the settings!");
+                panic!("Unable to parse the email in the settings!")
+            }
         })
-        .to(match email.parse() {
+        .to(match address.parse() {
             Ok(mailbox) => mailbox,
-            Err(_) => return Err(Error::ParseEmail),
+            Err(_) => {
+                warn!("Error while parsing destination email for token {}", token);
+                return Err(Error::ParseEmail);
+            }
         })
         .subject(
             SETTINGS
@@ -87,11 +138,20 @@ pub fn send_confirmation_email(email: &str, action: &Action, token: &str) -> Res
 
     let message = match email {
         Ok(message) => message,
-        Err(_) => return Err(Error::MailGeneration),
+        Err(_) => {
+            warn!("Unable to build email for token {}", token);
+            return Err(Error::MailGeneration);
+        }
     };
 
     match MAILER.send(&message) {
-        Ok(_) => Ok(()),
-        Err(_) => Err(Error::SendMail),
+        Ok(_) => {
+            debug!("successfully sent email to {}", address);
+            Ok(())
+        }
+        Err(_) => {
+            warn!("Unable to send email to {}", address);
+            Err(Error::SendMail)
+        }
     }
 }

src/main.rs

@@ -12,7 +12,7 @@ use self::management::{clean_stale, store_pending_addition, store_pending_deleti
 use self::utils::{gen_random_token, get_email_from_cert, parse_pem};
 
 use actix_web::{get, post, web, App, HttpServer, Result};
-use log::error;
+use log::{error, info};
 use serde::Deserialize;
 use std::fs;
 use std::path::Path;
@@ -39,6 +39,7 @@ struct Email {
 #[actix_web::main]
 async fn main() -> std::io::Result<()> {
     if init_logger().is_err() {
+        error!("Could not set up logger!");
         panic!("Could not set up logger!")
     };
     fs::create_dir_all(pending_path!())?;
@@ -46,9 +47,9 @@ async fn main() -> std::io::Result<()> {
         let mut metronome = time::interval(time::Duration::from_secs(SETTINGS.cleanup_interval));
         loop {
             metronome.tick().await;
-            if clean_stale(SETTINGS.max_age).is_err() {
-                error!("Error while cleaning stale requests!");
-            }
+            info!("Running cleanup...");
+            clean_stale(SETTINGS.max_age);
+            info!("Cleanup completed!");
         }
     });
     HttpServer::new(|| App::new().service(submit).service(confirm).service(delete))
@@ -62,14 +63,19 @@ async fn submit(pem: web::Form<Pem>) -> Result<String> {
     let cert = parse_pem(&pem.key)?;
     let email = get_email_from_cert(&cert)?;
     let token = gen_random_token();
-    store_pending_addition(pem.key.clone(), &token)?;
+    store_pending_addition(pem.key.clone(), &email, &token)?;
     send_confirmation_email(&email, &Action::Add, &token)?;
+    info!("User {} submitted a key!", &email);
     Ok(String::from("Key submitted successfully!"))
 }
 
 #[get("/api/confirm/{value}")]
 async fn confirm(token: web::Path<Token>) -> Result<String> {
-    confirm_action(&token.value)?;
+    let (action, email) = confirm_action(&token.value)?;
+    match action {
+        Action::Add => info!("Key for user {} was added successfully!", email),
+        Action::Delete => info!("Key for user {} was deleted successfully!", email),
+    }
     Ok(String::from("Confirmation successful!"))
 }
 
@@ -79,5 +85,6 @@ async fn delete(email: web::Path<Email>) -> Result<String> {
     let token = gen_random_token();
     store_pending_deletion(email.address.clone(), &token)?;
     send_confirmation_email(&email.address, &Action::Delete, &token)?;
+    info!("User {} requested the deletion of his key!", email.address);
     Ok(String::from("Deletion request submitted successfully!"))
 }

src/management.rs

@@ -1,14 +1,15 @@
-use crate::errors::Error;
 use crate::pending_path;
 use crate::settings::SETTINGS;
 use crate::utils::get_user_file_path;
 use crate::PENDING_FOLDER;
+use crate::{errors::Error, utils::get_filename};
 
 use chrono::Utc;
+use log::{debug, warn};
 use serde::{Deserialize, Serialize};
 use std::{fmt::Display, fs, path::Path};
 
-#[derive(Serialize, Deserialize, Debug)]
+#[derive(Serialize, Deserialize, Debug, Clone, Copy)]
 pub enum Action {
     Add,
     Delete,
@@ -65,40 +66,62 @@ fn store_pending(pending: &Pending, token: &str) -> Result<(), Error> {
     }
 }
 
-pub fn store_pending_addition(pem: String, token: &str) -> Result<(), Error> {
+pub fn store_pending_addition(pem: String, email: &str, token: &str) -> Result<(), Error> {
     let pending = Pending::build_add(pem);
     store_pending(&pending, token)?;
+    debug!("Stored submission from {} with token {}", email, token);
     Ok(())
 }
 
 pub fn store_pending_deletion(email: String, token: &str) -> Result<(), Error> {
-    let pending = Pending::build_delete(email);
+    let pending = Pending::build_delete(email.clone());
     store_pending(&pending, token)?;
+    debug!(
+        "Stored deletion request from {} with token {}",
+        email, token
+    );
     Ok(())
 }
 
-pub fn clean_stale(max_age: i64) -> Result<(), Error> {
+pub fn clean_stale(max_age: i64) {
     for path in fs::read_dir(pending_path!()).unwrap().flatten() {
         let file_path = path.path();
         if file_path.is_file() {
             let content = match fs::read_to_string(&file_path) {
                 Ok(content) => content,
-                Err(_) => return Err(Error::Inaccessible),
+                Err(_) => {
+                    warn!(
+                        "Could not read contents of token {} to string",
+                        get_filename(&file_path).unwrap()
+                    );
+                    continue;
+                }
             };
             let key = match serde_json::from_str::<Pending>(&content) {
                 Ok(key) => key,
-                Err(_) => return Err(Error::DeserializeData),
+                Err(_) => {
+                    warn!(
+                        "Could not deserialize token {}",
+                        get_filename(&file_path).unwrap()
+                    );
+                    continue;
+                }
             };
             let now = Utc::now().timestamp();
             if now - key.timestamp() > max_age {
-                let err = fs::remove_file(&file_path).is_err();
-                if err {
-                    return Err(Error::Inaccessible);
+                if fs::remove_file(&file_path).is_err() {
+                    {
+                        warn!(
+                            "Could not delete stale token {}",
+                            get_filename(&file_path).unwrap()
+                        );
+                        continue;
+                    };
+                }
+                debug!("Deleted stale token {}", get_filename(&file_path).unwrap())
             }
         }
     }
-    }
-    Ok(())
 }
 
 pub fn delete_key(email: &str) -> Result<(), Error> {

src/settings.rs

@@ -1,4 +1,5 @@
 use lettre::{transport::smtp::authentication::Credentials, SmtpTransport};
+use log::{debug, error, warn};
 use once_cell::sync::Lazy;
 use sequoia_net::wkd::Variant;
 use serde::{Deserialize, Serialize};
@@ -42,18 +43,27 @@ pub enum SMTPEncryption {
 }
 
 fn get_settings() -> Settings {
+    debug!("Reading settings...");
     let content = match fs::read_to_string("wkd.toml") {
         Ok(content) => content,
-        Err(_) => panic!("Unable to access settings file!"),
+        Err(_) => {
+            error!("Unable to access settings file!");
+            panic!("Unable to access settings file!")
+        }
     };
     let settings = match toml::from_str(&content) {
         Ok(settings) => settings,
-        Err(_) => panic!("Unable to parse settings from file!"),
+        Err(_) => {
+            error!("Unable to parse settings from file!");
+            panic!("Unable to parse settings from file!")
+        }
     };
+    debug!("Successfully read setting!");
     settings
 }
 
 fn get_mailer() -> SmtpTransport {
+    debug!("Setting up SMTP...");
     let creds = Credentials::new(
         SETTINGS.mail_settings.smtp_username.to_owned(),
         SETTINGS.mail_settings.smtp_password.to_owned(),
@@ -66,11 +76,18 @@ fn get_mailer() -> SmtpTransport {
     };
     let mailer = match builder {
         Ok(builder) => builder,
-        Err(_) => panic!("Unable to set up smtp"),
+        Err(_) => {
+            error!("Unable to set up smtp");
+            panic!("Unable to set up smtp")
+        }
     }
     .credentials(creds)
     .port(SETTINGS.mail_settings.smtp_port)
     .build();
+    if mailer.test_connection().is_err() {
+        warn!("Connection test to smtp host failed!");
+    }
+    debug!("SMTP setup successful!");
     mailer
 }
 

src/utils.rs

@@ -60,6 +60,10 @@ pub fn key_exists(email: &str) -> Result<bool, Error> {
     Ok(true)
 }
 
+pub fn get_filename(path: &Path) -> Option<&str> {
+    path.file_name()?.to_str()
+}
+
 pub fn custom_format(
     w: &mut dyn std::io::Write,
     now: &mut DeferredNow,