Improved handling, added more routes

.gitignore

@@ -1,4 +1,6 @@
 /target
 /tmp
 /src/files
+temp_files
 *.mochi
+settings.toml

Cargo.lock

@@ -740,6 +740,7 @@ dependencies = [
  "log",
  "maud",
  "rocket",
+ "toml",
  "uuid",
 ]
 

Cargo.toml

@@ -10,6 +10,7 @@ chrono = { version = "0.4.38", features = ["serde"] }
 log = "0.4"
 maud = { version = "0.26", features = ["rocket"] }
 rocket = { version = "0.5", features = ["json"] }
+toml = "0.8.19"
 uuid = { version = "1.11.0", features = ["v4"] }
 
 [profile.production]

src/database.rs

@@ -1,9 +1,10 @@
-use std::{collections::HashMap, fs::{self, File}, path::{Path, PathBuf}};
+use std::{collections::HashMap, fs::{self, File}, path::{Path, PathBuf}, sync::{Arc, RwLock}, time::Duration};
 
 use bincode::{config::Configuration, decode_from_std_read, encode_into_std_write, Decode, Encode};
 use chrono::{DateTime, TimeDelta, Utc};
 use blake3::Hash;
-use rocket::serde::{Deserialize, Serialize};
+use log::{info, warn};
+use rocket::{serde::{Deserialize, Serialize}, tokio::{select, sync::mpsc::Receiver, time}};
 
 const BINCODE_CFG: Configuration = bincode::config::standard();
 
@@ -131,3 +132,57 @@ pub struct MochiKey {
     #[bincode(with_serde)]
     hash: Hash,
 }
+
+/// Clean the database. Removes files which are past their expiry
+/// [`chrono::DateTime`]. Also removes files which no longer exist on the disk.
+fn clean_database(db: &Arc<RwLock<Database>>) {
+    let mut database = db.write().unwrap();
+    let files_to_remove: Vec<_> = database.files.iter().filter_map(|e| {
+        if e.1.expired() {
+            // Check if the entry has expired
+            Some((e.0.clone(), e.1.clone()))
+        } else if !e.1.path().try_exists().is_ok_and(|r| r) {
+            // Check if the entry exists
+            Some((e.0.clone(), e.1.clone()))
+        } else {
+            None
+        }
+    }).collect();
+
+    let mut expired = 0;
+    let mut missing = 0;
+    for file in &files_to_remove {
+        let path = file.1.path();
+        // If the path does not exist, there's no reason to try to remove it.
+        if path.try_exists().is_ok_and(|r| r) {
+            match fs::remove_file(path) {
+                Ok(_) => (),
+                Err(e) => warn!("Failed to delete path at {:?}: {e}", path),
+            }
+            expired += 1;
+        } else {
+            missing += 1
+        }
+
+        database.files.remove(&file.0);
+    }
+
+    info!("{} expired and {} missing items cleared from database", expired, missing);
+    database.save();
+}
+
+/// A loop to clean the database periodically.
+pub async fn clean_loop(
+    db: Arc<RwLock<Database>>,
+    mut shutdown_signal: Receiver<()>,
+    interval: Duration,
+) {
+    let mut interval = time::interval(interval);
+
+    loop {
+        select! {
+            _ = interval.tick() => clean_database(&db),
+            _ = shutdown_signal.recv() => break,
+        };
+    }
+}

src/main.rs

@@ -1,15 +1,19 @@
 mod database;
+mod time_string;
+mod settings;
 
-use std::{fs, path::{Path, PathBuf}, sync::{Arc, RwLock}, time::Duration};
+use std::{path::{Path, PathBuf}, sync::{Arc, RwLock}, time::Duration};
 use blake3::Hash;
 use chrono::{DateTime, TimeDelta, Utc};
-use database::{Database, MochiFile};
-use log::{debug, info, warn};
-use maud::{html, Markup, DOCTYPE, PreEscaped};
+use database::{clean_loop, Database, MochiFile};
+use log::info;
 use rocket::{
-    form::Form, fs::{FileServer, Options, TempFile}, get, post, routes, serde::{json::Json, Serialize}, tokio::{self, fs::File, io::AsyncReadExt, select, spawn, time}, FromForm, State
+    data::{Limits, ToByteUnit}, form::Form, fs::{FileServer, Options, TempFile}, get, post, response::content::{RawCss, RawJavaScript}, routes, serde::{json::Json, Serialize}, tokio::{self, fs::File, io::AsyncReadExt}, Config, FromForm, State
 };
+use settings::Settings;
+use time_string::parse_time_string;
 use uuid::Uuid;
+use maud::{html, Markup, DOCTYPE};
 
 fn head(page_title: &str) -> Markup {
     html! {
@@ -18,12 +22,22 @@ fn head(page_title: &str) -> Markup {
         meta name="viewport" content="width=device-width, initial-scale=1";
         title { (page_title) }
         // Javascript stuff for client side handling
-        script { (PreEscaped(include_str!("static/request.js"))) }
-        // CSS for styling the sheets
-        style { (PreEscaped(include_str!("static/main.css"))) }
+        script src="request.js" { }
     }
 }
 
+/// Stylesheet
+#[get("/main.css")]
+fn stylesheet() -> RawCss<&'static str> {
+    RawCss(include_str!("static/main.css"))
+}
+
+/// Upload handler javascript
+#[get("/request.js")]
+fn form_handler_js() -> RawJavaScript<&'static str> {
+    RawJavaScript(include_str!("static/request.js"))
+}
+
 #[get("/")]
 fn home() -> Markup {
     html! {
@@ -36,6 +50,8 @@ fn home() -> Markup {
                             "Upload File"
                         }
                         input id="fileInput" type="file" name="fileUpload" onchange="formSubmit(this.parentNode)" style="display:none;";
+                        br;
+                        input type="text" name="duration" minlength="2" maxlength="4";
                     }
                     div class="progress-box" {
                         progress id="uploadProgress" value="0" max="100" {}
@@ -55,6 +71,9 @@ fn home() -> Markup {
 struct Upload<'r> {
     #[field(name = "fileUpload")]
     file: TempFile<'r>,
+
+    #[field(name = "duration")]
+    expire_time: String,
 }
 
 /// Handle a file upload and store it
@@ -62,27 +81,42 @@ struct Upload<'r> {
 async fn handle_upload(
     mut file_data: Form<Upload<'_>>,
     db: &State<Arc<RwLock<Database>>>
-) -> Result<Json<FileLocation>, std::io::Error> {
+) -> Result<Json<ClientResponse>, std::io::Error> {
     let mut out_path = PathBuf::from("files/");
 
+    let expire_time = if let Ok(t) = parse_time_string(&file_data.expire_time) {
+        if t < TimeDelta::days(365) {
+            t
+        } else {
+            TimeDelta::days(365)
+        }
+    } else {
+        return Ok(Json(ClientResponse {
+            status: false,
+            response: "Invalid duration",
+            ..Default::default()
+        }))
+    };
+
     // Get temp path and hash it
     let temp_filename = "temp_files/".to_owned() + &Uuid::new_v4().to_string();
     file_data.file.persist_to(&temp_filename).await?;
     let hash = hash_file(&temp_filename).await?;
 
-    let filename = get_filename(
-        // TODO: Properly sanitize this...
-        file_data.file.raw_name().unwrap().dangerous_unsafe_unsanitized_raw().as_str(),
+    // TODO: Properly sanitize this...
+    let raw_name = file_data.file.raw_name().unwrap().dangerous_unsafe_unsanitized_raw().as_str();
+    let filename = get_id(
+        raw_name,
         hash.0
     );
     out_path.push(filename.clone());
 
     let constructed_file = MochiFile::new_with_expiry(
-        file_data.file.raw_name().unwrap().dangerous_unsafe_unsanitized_raw().as_str(),
+        raw_name,
         hash.1,
         hash.0,
         out_path.clone(),
-        TimeDelta::hours(24)
+        expire_time
     );
 
     // Move it to the new proper place
@@ -91,23 +125,35 @@ async fn handle_upload(
     db.write().unwrap().files.insert(constructed_file.get_key(), constructed_file.clone());
     db.write().unwrap().save();
 
-    let location = FileLocation {
-        name: constructed_file.name().clone(),
+    Ok(Json(ClientResponse {
         status: true,
+        name: Some(constructed_file.name().clone()),
         url: Some("files/".to_string() + &filename),
-        expires: constructed_file.get_expiry(),
-    };
-
-    Ok(Json(location))
+        expires: Some(constructed_file.get_expiry()),
+        ..Default::default()
+    }))
 }
 
-#[derive(Serialize)]
+/// A response to the client from the server
+#[derive(Serialize, Default, Debug)]
 #[serde(crate = "rocket::serde")]
-struct FileLocation {
-    pub name: String,
+struct ClientResponse {
+    /// Success or failure
     pub status: bool,
+
+    pub response: &'static str,
+
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub name: Option<String>,
+    #[serde(skip_serializing_if = "Option::is_none")]
     pub url: Option<String>,
-    pub expires: DateTime<Utc>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub expires: Option<DateTime<Utc>>,
+}
+
+/// Get a filename based on the file's hashed name
+fn get_id(name: &str, hash: Hash) -> String {
+    hash.to_hex()[0..10].to_string() + "_" + name
 }
 
 /// Get the Blake3 hash of a file, without reading it all into memory, and also get the size
@@ -127,63 +173,65 @@ async fn hash_file<P: AsRef<Path>>(input: &P) -> Result<(Hash, usize), std::io::
     Ok((hasher.finalize(), total))
 }
 
-/// Get a random filename for use as the uploaded file's name
-fn get_filename(name: &str, hash: Hash) -> String {
-    hash.to_hex()[0..10].to_string() + "_" + name
+/// An endpoint to obtain information about the server's capabilities
+#[get("/info")]
+fn server_info(settings: &State<Settings>) -> Json<ServerInfo> {
+    Json(ServerInfo {
+        max_filesize: settings.max_filesize,
+        max_duration: settings.max_duration,
+    })
 }
 
-fn clean_database(db: &Arc<RwLock<Database>>) {
-    info!("Cleaning database");
-    let mut expired_list = Vec::new();
-
-    let mut database = db.write().unwrap();
-    for file in &database.files {
-        if file.1.expired() {
-            expired_list.push((file.0.clone(), file.1.clone()));
-        }
-    }
-
-    for file in expired_list {
-        let path = file.1.path();
-        if path.exists() {
-            match fs::remove_file(path) {
-                Ok(_) => (),
-                Err(_) => warn!("Failed to delete path at {:?}", path),
-            }
-        }
-        debug!("Deleted file: {}", file.1.name());
-        database.files.remove(&file.0);
-    }
-
-    database.save();
+#[derive(Serialize, Debug)]
+#[serde(crate = "rocket::serde")]
+struct ServerInfo {
+    max_filesize: u64,
+    max_duration: u32,
 }
 
 #[rocket::main]
 async fn main() {
+    // Get or create config file
+    let config = Settings::open(&"./settings.toml")
+        .expect("Could not open settings file");
+
+    // Set rocket configuration settings
+    let rocket_config = Config {
+        address: config.server.address.parse().expect("IP address invalid"),
+        port: config.server.port,
+        temp_dir: config.temp_dir.clone().into(),
+        limits: Limits::default()
+            .limit("data-form", config.max_filesize.bytes())
+            .limit("file", config.max_filesize.bytes()),
+        ..Default::default()
+    };
+
     let database = Arc::new(RwLock::new(Database::open(&"database.mochi")));
     let local_db = database.clone();
 
     // Start monitoring thread
-    let (shutdown, mut rx) = tokio::sync::mpsc::channel(1);
-    let cleaner_db = database.clone();
-    spawn(async move {
-        let mut interval = time::interval(Duration::from_secs(120));
-
-        loop {
-            select! {
-                _ = interval.tick() => clean_database(&cleaner_db),
-                _ = rx.recv() => break,
-            };
-        }
+    let (shutdown, rx) = tokio::sync::mpsc::channel(1);
+    tokio::spawn({
+        let cleaner_db = database.clone();
+        async move { clean_loop(cleaner_db, rx, Duration::from_secs(120)).await }
     });
 
     let rocket = rocket::build()
+        .mount(
+            config.root_path.clone() + "/",
+            routes![home, handle_upload, form_handler_js, stylesheet, server_info]
+        )
+        .mount(
+            config.root_path.clone() + "/files",
+            FileServer::new("files/", Options::Missing | Options::NormalizeDirs)
+        )
         .manage(database)
-        .mount("/", routes![home, handle_upload])
-        .mount("/files", FileServer::new("files/", Options::Missing | Options::NormalizeDirs))
+        .manage(config)
+        .configure(rocket_config)
         .launch()
         .await;
 
+    // Ensure the server gracefully shuts down
     rocket.expect("Server failed to shutdown gracefully");
 
     info!("Stopping database cleaning thread");

src/settings.rs

@@ -0,0 +1,90 @@
+use std::{fs::{self, File}, io::{self, Read, Write}, path::{Path, PathBuf}};
+
+use rocket::serde::{Deserialize, Serialize};
+
+/// A response to the client from the server
+#[derive(Deserialize, Serialize, Debug)]
+#[serde(crate = "rocket::serde")]
+pub struct Settings {
+    /// Maximum filesize in bytes
+    pub max_filesize: u64,
+
+    /// Maximum file lifetime, seconds
+    pub max_duration: u32,
+
+    /// The path to the root directory of the program, ex `/filehost/`
+    pub root_path: String,
+
+    /// The path to the database file
+    pub database_path: PathBuf,
+
+    /// Temporary directory for stuff
+    pub temp_dir: PathBuf,
+
+    pub server: ServerSettings,
+
+    #[serde(skip)]
+    path: PathBuf,
+}
+
+impl Default for Settings {
+    fn default() -> Self {
+        Self {
+            max_filesize: 128_000_000, // 128MB
+            max_duration: 86_400, // 1 day
+            root_path: "/".into(),
+            server: ServerSettings::default(),
+            path: "./settings.toml".into(),
+            database_path: "./database.mochi".into(),
+            temp_dir: std::env::temp_dir()
+        }
+    }
+}
+
+impl Settings {
+    pub fn open<P: AsRef<Path>>(path: &P) -> Result<Self, io::Error> {
+        let mut input_str = String::new();
+        if !path.as_ref().exists() {
+            let new_self = Self {
+                path: path.as_ref().to_path_buf(),
+                ..Default::default()
+            };
+            new_self.save()?;
+            return Ok(new_self);
+        } else {
+            File::open(path).unwrap().read_to_string(&mut input_str)?;
+        }
+
+        let mut parsed_settings: Self = toml::from_str(&input_str).unwrap();
+        parsed_settings.path = path.as_ref().to_path_buf();
+
+        Ok(parsed_settings)
+    }
+
+    pub fn save(&self) -> Result<(), io::Error> {
+        let mut out_path = self.path.clone();
+        out_path.set_extension(".bkp");
+        let mut file = File::create(&out_path).expect("Could not save!");
+        file.write_all(&toml::to_string_pretty(self).unwrap().into_bytes())?;
+
+        fs::rename(out_path, &self.path).unwrap();
+
+        Ok(())
+    }
+}
+
+#[derive(Deserialize, Serialize, Debug)]
+#[serde(crate = "rocket::serde")]
+pub struct ServerSettings {
+    pub address: String,
+    pub port: u16,
+}
+
+impl Default for ServerSettings {
+    fn default() -> Self {
+        Self {
+            address: "127.0.0.1".into(),
+            port: 8955
+        }
+    }
+}

src/static/main.css

@@ -1,5 +1,4 @@
 @import url('https://g2games.dev/assets/fonts/fonts.css');
-@import url('https://g2games.dev/assets/main-style.css');
 
 .main-wrapper {
     margin: auto;

src/static/request.js

@@ -1,11 +1,30 @@
-let progressBar = null;
-let progressValue = null;
-let statusNotifier = null;
+let progressBar;
+let progressValue;
+let statusNotifier;
+let uploadedFilesDisplay;
 
 let uploadInProgress = false;
-let uploadedFilesDisplay = null;
+
+const TOO_LARGE_TEXT = "File is too large!";
+const ERROR_TEXT = "An error occured!";
+
+let MAX_FILESIZE;
+let MAX_DURATION;
 
 async function formSubmit(form) {
+    if (uploadInProgress) {
+        return;
+    }
+
+    // Get file size and don't upload if it's too large
+    let file_upload = document.getElementById("fileInput");
+    let file = file_upload.files[0];
+    if (file.size > MAX_FILESIZE) {
+        progressValue.textContent = TOO_LARGE_TEXT;
+        console.error("Provided file is too large", file.size, "bytes; max", MAX_FILESIZE, "bytes");
+        return;
+    }
+
     let url = "/upload";
     let request = new XMLHttpRequest();
     request.open('POST', url, true);
@@ -19,7 +38,7 @@ async function formSubmit(form) {
     try {
         request.send(new FormData(form));
     } catch (e) {
-        console.log(e);
+        console.error("An error occured while uploading", e);
     }
 
     // Reset the form data since we've successfully submitted it
@@ -28,24 +47,27 @@ async function formSubmit(form) {
 
 function networkErrorHandler(_err) {
     uploadInProgress = false;
-    console.log("An error occured while uploading");
+    console.error("A network error occured while uploading");
     progressValue.textContent = "A network error occured!";
 }
 
 function uploadComplete(response) {
     let target = response.target;
 
-    console.log(target);
     if (target.status === 200) {
         const response = JSON.parse(target.responseText);
 
-        console.log(response);
         if (response.status) {
             progressValue.textContent = "Success";
             addToList(response.name, response.url);
+        } else {
+            console.error("Error uploading", response)
+            progressValue.textContent = response.response;
         }
     } else if (target.status === 413) {
-        progressValue.textContent = "File too large!";
+        progressValue.textContent = TOO_LARGE_TEXT;
+    } else {
+        progressValue.textContent = ERROR_TEXT;
     }
 
     uploadInProgress = false;
@@ -67,18 +89,18 @@ function uploadProgress(progress) {
     }
 }
 
-function attachFormSubmitEvent(formId) {
-    if (uploadInProgress) {
-        return;
-    }
-
-    document.getElementById(formId).addEventListener("submit", formSubmit);
+async function getServerCapabilities() {
+    let capabilities = await fetch("info").then((response) => response.json());
+    MAX_FILESIZE = capabilities.max_filesize;
+    MAX_DURATION = capabilities.max_duration;
 }
 
 document.addEventListener("DOMContentLoaded", function(_event){
-    attachFormSubmitEvent("uploadForm");
+    document.getElementById("uploadForm").addEventListener("submit", formSubmit);
     progressBar = document.getElementById("uploadProgress");
     progressValue = document.getElementById("uploadProgressValue");
     statusNotifier = document.getElementById("uploadStatus");
     uploadedFilesDisplay = document.getElementById("uploadedFilesDisplay");
-})
+});
+
+getServerCapabilities();

src/time_string.rs

@@ -0,0 +1,36 @@
+use std::error::Error;
+
+use chrono::TimeDelta;
+
+pub fn parse_time_string(string: &str) -> Result<TimeDelta, Box<dyn Error>> {
+    if string.len() > 5 {
+        return Err("Not valid time string".into())
+    }
+
+    let unit = string.chars().last();
+    let multiplier = if let Some(u) = unit {
+        if !u.is_ascii_alphabetic() {
+            return Err("Not valid time string".into())
+        }
+
+        match u {
+            'D' | 'd' => TimeDelta::days(1),
+            'H' | 'h' => TimeDelta::hours(1),
+            'M' | 'm' => TimeDelta::minutes(1),
+            'S' | 's' => TimeDelta::seconds(1),
+            _ => return Err("Not valid time string".into()),
+        }
+    } else {
+        return Err("Not valid time string".into())
+    };
+
+    let time = if let Ok(n) = string[..string.len() - 1].parse::<i32>() {
+        n
+    } else {
+        return Err("Not valid time string".into())
+    };
+
+    let final_time = multiplier * time;
+
+    Ok(final_time)
+}