Chunked uploads (#2)

* Switch database to begin using CBOR, and begin work on chunked uploads

* Chunked uploads work, no feedback to client yet

* Added poorly implemented progress for chunked uploads

* I think these methods are cursed

* Improved performance by properly limiting the number of uploads

* Properly show errors in file bars again

* Improved setup for chunk downloading, added chunk size to config

* Ran clippy, added chunk cleaner

* Ran `cargo fmt`

Cargo.toml

@@ -4,9 +4,9 @@ version = "0.1.2"
 edition = "2021"
 
 [dependencies]
-bincode = { version = "2.0.0-rc.3", features = ["serde"] }
 blake3 = { version = "1.5.4", features = ["mmap", "rayon", "serde"] }
 chrono = { version = "0.4.38", features = ["serde"] }
+ciborium = "0.2.2"
 file-format = { version = "0.25.0", features = ["reader"] }
 log = "0.4"
 lz4_flex = "0.11.3"
@@ -16,7 +16,7 @@ rocket = { version = "0.5", features = ["json"] }
 serde = { version = "1.0.213", features = ["derive"] }
 serde_with = { version = "3.11.0", features = ["chrono_0_4"] }
 toml = "0.8.19"
-uuid = { version = "1.11.0", features = ["v4"] }
+uuid = { version = "1.11.0", features = ["serde", "v4"] }
 
 [profile.production]
 inherits = "release"

src/database.rs

@@ -7,33 +7,32 @@ use std::{
     sync::{Arc, RwLock},
 };
 
-use bincode::{config::Configuration, decode_from_std_read, encode_into_std_write, Decode, Encode};
 use blake3::Hash;
 use chrono::{DateTime, TimeDelta, Utc};
+use ciborium::{from_reader, into_writer};
 use log::{error, info, warn};
 use rand::distributions::{Alphanumeric, DistString};
 use rocket::{
+    form::{self, FromFormField, ValueField},
     serde::{Deserialize, Serialize},
-    tokio::{select, sync::mpsc::Receiver, time},
 };
 use serde_with::{serde_as, DisplayFromStr};
+use uuid::Uuid;
 
-const BINCODE_CFG: Configuration = bincode::config::standard();
-
-#[derive(Debug, Clone, Decode, Encode)]
+#[derive(Debug, Clone, Deserialize, Serialize)]
 pub struct Mochibase {
     path: PathBuf,
 
     /// Every hash in the database along with the [`Mmid`]s associated with them
-    #[bincode(with_serde)]
     hashes: HashMap<Hash, HashSet<Mmid>>,
 
     /// All entries in the database
-    #[bincode(with_serde)]
     entries: HashMap<Mmid, MochiFile>,
 }
 
 impl Mochibase {
+    /// Create a new database initialized with no data, and save it to the
+    /// provided path
     pub fn new<P: AsRef<Path>>(path: &P) -> Result<Self, io::Error> {
         let output = Self {
             path: path.as_ref().to_path_buf(),
@@ -52,7 +51,7 @@ impl Mochibase {
         let file = File::open(path)?;
         let mut lz4_file = lz4_flex::frame::FrameDecoder::new(file);
 
-        decode_from_std_read(&mut lz4_file, BINCODE_CFG)
+        from_reader(&mut lz4_file)
             .map_err(|e| io::Error::other(format!("failed to open database: {e}")))
     }
 
@@ -70,7 +69,7 @@ impl Mochibase {
         // Create a file and write the LZ4 compressed stream into it
         let file = File::create(self.path.with_extension("bkp"))?;
         let mut lz4_file = lz4_flex::frame::FrameEncoder::new(file);
-        encode_into_std_write(self, &mut lz4_file, BINCODE_CFG)
+        into_writer(self, &mut lz4_file)
             .map_err(|e| io::Error::other(format!("failed to save database: {e}")))?;
         lz4_file.try_finish()?;
 
@@ -154,7 +153,7 @@ impl Mochibase {
 
 /// An entry in the database storing metadata about a file
 #[serde_as]
-#[derive(Debug, Clone, Decode, Encode, Deserialize, Serialize)]
+#[derive(Debug, Clone, Deserialize, Serialize)]
 pub struct MochiFile {
     /// A unique identifier describing this file
     mmid: Mmid,
@@ -166,16 +165,13 @@ pub struct MochiFile {
     mime_type: String,
 
     /// The Blake3 hash of the file
-    #[bincode(with_serde)]
     #[serde_as(as = "DisplayFromStr")]
     hash: Hash,
 
     /// The datetime when the file was uploaded
-    #[bincode(with_serde)]
     upload_datetime: DateTime<Utc>,
 
     /// The datetime when the file is set to expire
-    #[bincode(with_serde)]
     expiry_datetime: DateTime<Utc>,
 }
 
@@ -227,7 +223,7 @@ impl MochiFile {
 
 /// 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<Mochibase>>, file_path: &Path) {
+pub fn clean_database(db: &Arc<RwLock<Mochibase>>, file_path: &Path) {
     let mut database = db.write().unwrap();
 
     // Add expired entries to the removal list
@@ -266,26 +262,9 @@ fn clean_database(db: &Arc<RwLock<Mochibase>>, file_path: &Path) {
     drop(database); // Just to be sure
 }
 
-/// A loop to clean the database periodically.
-pub async fn clean_loop(
-    db: Arc<RwLock<Mochibase>>,
-    file_path: PathBuf,
-    mut shutdown_signal: Receiver<()>,
-    interval: TimeDelta,
-) {
-    let mut interval = time::interval(interval.to_std().unwrap());
-
-    loop {
-        select! {
-            _ = interval.tick() => clean_database(&db, &file_path),
-            _ = shutdown_signal.recv() => break,
-        };
-    }
-}
-
 /// A unique identifier for an entry in the database, 8 characters long,
 /// consists of ASCII alphanumeric characters (`a-z`, `A-Z`, and `0-9`).
-#[derive(Debug, PartialEq, Eq, Clone, Hash, Decode, Encode, Deserialize, Serialize)]
+#[derive(Debug, PartialEq, Eq, Clone, Hash, Deserialize, Serialize)]
 pub struct Mmid(String);
 
 impl Mmid {
@@ -347,3 +326,66 @@ impl std::fmt::Display for Mmid {
         write!(f, "{}", self.0)
     }
 }
+
+#[rocket::async_trait]
+impl<'r> FromFormField<'r> for Mmid {
+    fn from_value(field: ValueField<'r>) -> form::Result<'r, Self> {
+        Ok(Self::try_from(field.value).map_err(|_| form::Error::validation("Invalid MMID"))?)
+    }
+}
+
+/// An in-memory database for partially uploaded chunks of files
+#[derive(Default, Debug)]
+pub struct Chunkbase {
+    chunks: HashMap<Uuid, (DateTime<Utc>, ChunkedInfo)>,
+}
+
+impl Chunkbase {
+    pub fn chunks(&self) -> &HashMap<Uuid, (DateTime<Utc>, ChunkedInfo)> {
+        &self.chunks
+    }
+
+    pub fn mut_chunks(&mut self) -> &mut HashMap<Uuid, (DateTime<Utc>, ChunkedInfo)> {
+        &mut self.chunks
+    }
+
+    /// Delete all temporary chunk files
+    pub fn delete_all(&mut self) -> Result<(), io::Error> {
+        for (_timeout, chunk) in self.chunks.values() {
+            fs::remove_file(&chunk.path)?;
+        }
+
+        self.chunks.clear();
+
+        Ok(())
+    }
+
+    pub fn delete_timed_out(&mut self) -> Result<(), io::Error> {
+        let now = Utc::now();
+        self.mut_chunks().retain(|_u, (t, c)| {
+            if *t <= now {
+                let _ = fs::remove_file(&c.path);
+                false
+            } else {
+                true
+            }
+        });
+
+        Ok(())
+    }
+}
+
+/// Information about how to manage partially uploaded chunks of files
+#[serde_as]
+#[derive(Default, Debug, Clone, Deserialize, Serialize)]
+pub struct ChunkedInfo {
+    pub name: String,
+    pub size: u64,
+    #[serde_as(as = "serde_with::DurationSeconds<i64>")]
+    pub expire_duration: TimeDelta,
+
+    #[serde(skip)]
+    pub path: PathBuf,
+    #[serde(skip)]
+    pub offset: u64,
+}

src/lib.rs

@@ -6,22 +6,28 @@ pub mod settings;
 pub mod strings;
 pub mod utils;
 
-use std::sync::{Arc, RwLock};
+use std::{
+    io::{self, ErrorKind},
+    sync::{Arc, RwLock},
+};
 
-use crate::database::{Mmid, MochiFile, Mochibase};
-use crate::pages::{footer, head};
-use crate::settings::Settings;
-use crate::strings::{parse_time_string, to_pretty_time};
-use crate::utils::hash_file;
-use chrono::{DateTime, Utc};
+use crate::{
+    pages::{footer, head},
+    settings::Settings,
+    strings::to_pretty_time,
+};
+use chrono::{TimeDelta, Utc};
+use database::{Chunkbase, ChunkedInfo, Mmid, MochiFile, Mochibase};
 use maud::{html, Markup, PreEscaped};
 use rocket::{
     data::ToByteUnit,
-    form::Form,
-    fs::TempFile,
     get, post,
     serde::{json::Json, Serialize},
-    FromForm, State,
+    tokio::{
+        fs,
+        io::{AsyncSeekExt, AsyncWriteExt},
+    },
+    Data, State,
 };
 use uuid::Uuid;
 
@@ -52,7 +58,7 @@ pub fn home(settings: &State<Settings>) -> Markup {
             form #uploadForm {
                 // It's stupid how these can't be styled so they're just hidden here...
                 input #fileDuration type="text" name="duration" minlength="2"
-                maxlength="7" value=(settings.duration.default.num_seconds().to_string() + "s") style="display:none;";
+                maxlength="7" value=(settings.duration.default.num_seconds().to_string()) style="display:none;";
                 input #fileInput type="file" name="fileUpload" multiple
                 onchange="formSubmit(this.parentNode)" data-max-filesize=(settings.max_filesize) style="display:none;";
             }
@@ -69,113 +75,172 @@ pub fn home(settings: &State<Settings>) -> Markup {
     }
 }
 
-#[derive(Debug, FromForm)]
-pub struct Upload<'r> {
-    #[field(name = "duration")]
-    expire_time: String,
+#[derive(Serialize, Default)]
+pub struct ChunkedResponse {
+    status: bool,
+    message: String,
 
-    #[field(name = "fileUpload")]
-    file: TempFile<'r>,
-}
-
-/// Handle a file upload and store it
-#[post("/upload", data = "<file_data>")]
-pub async fn handle_upload(
-    mut file_data: Form<Upload<'_>>,
-    db: &State<Arc<RwLock<Mochibase>>>,
-    settings: &State<Settings>,
-) -> Result<Json<ClientResponse>, std::io::Error> {
-    let current = Utc::now();
-    // Ensure the expiry time is valid, if not return an error
-    let expire_time = if let Ok(t) = parse_time_string(&file_data.expire_time) {
-        if settings.duration.restrict_to_allowed && !settings.duration.allowed.contains(&t) {
-            return Ok(Json(ClientResponse::failure("Duration not allowed")));
-        }
-
-        if t > settings.duration.maximum {
-            return Ok(Json(ClientResponse::failure("Duration larger than max")));
-        }
-
-        t
-    } else {
-        return Ok(Json(ClientResponse::failure("Duration invalid")));
-    };
-
-    let raw_name = file_data
-        .file
-        .raw_name()
-        .unwrap()
-        .dangerous_unsafe_unsanitized_raw()
-        .as_str()
-        .to_string();
-
-    // Get temp path for the file
-    let temp_filename = settings.temp_dir.join(Uuid::new_v4().to_string());
-    file_data.file.persist_to(&temp_filename).await?;
-
-    // Get hash and random identifier and expiry
-    let file_mmid = Mmid::new_random();
-    let file_hash = hash_file(&temp_filename).await?;
-    let expiry = current + expire_time;
-
-    // Process filetype
-    let file_type = file_format::FileFormat::from_file(&temp_filename)?;
-
-    let constructed_file = MochiFile::new(
-        file_mmid.clone(),
-        raw_name,
-        file_type.media_type().to_string(),
-        file_hash,
-        current,
-        expiry,
-    );
-
-    // If the hash does not exist in the database,
-    // move the file to the backend, else, delete it
-    if db.read().unwrap().get_hash(&file_hash).is_none() {
-        std::fs::rename(temp_filename, settings.file_dir.join(file_hash.to_string()))?;
-    } else {
-        std::fs::remove_file(temp_filename)?;
-    }
-
-    db.write()
-        .unwrap()
-        .insert(&file_mmid, constructed_file.clone());
-
-    Ok(Json(ClientResponse {
-        status: true,
-        name: constructed_file.name().clone(),
-        mmid: Some(constructed_file.mmid().clone()),
-        hash: constructed_file.hash().to_string(),
-        expires: Some(constructed_file.expiry()),
-        ..Default::default()
-    }))
-}
-
-/// A response to the client from the server
-#[derive(Serialize, Default, Debug)]
-pub struct ClientResponse {
-    /// Success or failure
-    pub status: bool,
-
-    pub response: &'static str,
-
-    #[serde(skip_serializing_if = "str::is_empty")]
-    pub name: String,
+    /// UUID used for associating the chunk with the final file
     #[serde(skip_serializing_if = "Option::is_none")]
-    pub mmid: Option<Mmid>,
-    #[serde(skip_serializing_if = "str::is_empty")]
-    pub hash: String,
+    uuid: Option<Uuid>,
+
+    /// Valid max chunk size in bytes
     #[serde(skip_serializing_if = "Option::is_none")]
-    pub expires: Option<DateTime<Utc>>,
+    chunk_size: Option<u64>,
 }
 
-impl ClientResponse {
-    fn failure(response: &'static str) -> Self {
+impl ChunkedResponse {
+    fn failure(message: &str) -> Self {
         Self {
             status: false,
-            response,
+            message: message.to_string(),
             ..Default::default()
         }
     }
 }
+
+/// Start a chunked upload. Response contains all the info you need to continue
+/// uploading chunks.
+#[post("/upload/chunked", data = "<file_info>")]
+pub async fn chunked_upload_start(
+    db: &State<Arc<RwLock<Chunkbase>>>,
+    settings: &State<Settings>,
+    mut file_info: Json<ChunkedInfo>,
+) -> Result<Json<ChunkedResponse>, std::io::Error> {
+    let uuid = Uuid::new_v4();
+    file_info.path = settings.temp_dir.join(uuid.to_string());
+
+    // Perform some sanity checks
+    if file_info.size > settings.max_filesize {
+        return Ok(Json(ChunkedResponse::failure("File too large")));
+    }
+    if settings.duration.restrict_to_allowed
+        && !settings
+            .duration
+            .allowed
+            .contains(&file_info.expire_duration)
+    {
+        return Ok(Json(ChunkedResponse::failure("Duration not allowed")));
+    }
+    if file_info.expire_duration > settings.duration.maximum {
+        return Ok(Json(ChunkedResponse::failure("Duration too large")));
+    }
+
+    fs::File::create_new(&file_info.path).await?;
+
+    db.write().unwrap().mut_chunks().insert(
+        uuid,
+        (Utc::now() + TimeDelta::seconds(30), file_info.into_inner()),
+    );
+
+    Ok(Json(ChunkedResponse {
+        status: true,
+        message: "".into(),
+        uuid: Some(uuid),
+        chunk_size: Some(settings.chunk_size),
+    }))
+}
+
+#[post("/upload/chunked/<uuid>?<offset>", data = "<data>")]
+pub async fn chunked_upload_continue(
+    chunk_db: &State<Arc<RwLock<Chunkbase>>>,
+    settings: &State<Settings>,
+    data: Data<'_>,
+    uuid: &str,
+    offset: u64,
+) -> Result<(), io::Error> {
+    let uuid = Uuid::parse_str(uuid).map_err(io::Error::other)?;
+    let data_stream = data.open((settings.chunk_size + 100).bytes());
+
+    let chunked_info = match chunk_db.read().unwrap().chunks().get(&uuid) {
+        Some(s) => s.clone(),
+        None => return Err(io::Error::other("Invalid UUID")),
+    };
+
+    let mut file = fs::File::options()
+        .read(true)
+        .write(true)
+        .truncate(false)
+        .open(&chunked_info.1.path)
+        .await?;
+
+    if offset > chunked_info.1.size {
+        return Err(io::Error::new(
+            ErrorKind::InvalidInput,
+            "The seek position is larger than the file size",
+        ));
+    }
+
+    file.seek(io::SeekFrom::Start(offset)).await?;
+    data_stream.stream_to(&mut file).await?;
+    file.flush().await?;
+    let position = file.stream_position().await?;
+
+    if position > chunked_info.1.size {
+        chunk_db.write().unwrap().mut_chunks().remove(&uuid);
+        return Err(io::Error::other("File larger than expected"));
+    }
+
+    Ok(())
+}
+
+/// Finalize a chunked upload
+#[get("/upload/chunked/<uuid>?finish")]
+pub async fn chunked_upload_finish(
+    main_db: &State<Arc<RwLock<Mochibase>>>,
+    chunk_db: &State<Arc<RwLock<Chunkbase>>>,
+    settings: &State<Settings>,
+    uuid: &str,
+) -> Result<Json<MochiFile>, io::Error> {
+    let now = Utc::now();
+    let uuid = Uuid::parse_str(uuid).map_err(io::Error::other)?;
+    let chunked_info = match chunk_db.read().unwrap().chunks().get(&uuid) {
+        Some(s) => s.clone(),
+        None => return Err(io::Error::other("Invalid UUID")),
+    };
+
+    // Remove the finished chunk from the db
+    chunk_db
+        .write()
+        .unwrap()
+        .mut_chunks()
+        .remove(&uuid)
+        .unwrap();
+
+    if !chunked_info.1.path.try_exists().is_ok_and(|e| e) {
+        return Err(io::Error::other("File does not exist"));
+    }
+
+    // Get file hash
+    let mut hasher = blake3::Hasher::new();
+    hasher.update_mmap_rayon(&chunked_info.1.path).unwrap();
+    let hash = hasher.finalize();
+    let new_filename = settings.file_dir.join(hash.to_string());
+
+    // If the hash does not exist in the database,
+    // move the file to the backend, else, delete it
+    if main_db.read().unwrap().get_hash(&hash).is_none() {
+        std::fs::rename(&chunked_info.1.path, &new_filename).unwrap();
+    } else {
+        std::fs::remove_file(&chunked_info.1.path).unwrap();
+    }
+
+    let mmid = Mmid::new_random();
+    let file_type = file_format::FileFormat::from_file(&new_filename).unwrap();
+
+    let constructed_file = MochiFile::new(
+        mmid.clone(),
+        chunked_info.1.name,
+        file_type.media_type().to_string(),
+        hash,
+        now,
+        now + chunked_info.1.expire_duration,
+    );
+
+    main_db
+        .write()
+        .unwrap()
+        .insert(&mmid, constructed_file.clone());
+
+    Ok(Json(constructed_file))
+}

src/main.rs

@@ -1,16 +1,21 @@
 use std::{
     fs,
+    path::PathBuf,
     sync::{Arc, RwLock},
 };
 
 use chrono::TimeDelta;
 use confetti_box::{
-    database::{clean_loop, Mochibase},
+    database::{clean_database, Chunkbase, Mochibase},
     endpoints, pages, resources,
     settings::Settings,
 };
 use log::info;
-use rocket::{data::ToByteUnit as _, routes, tokio};
+use rocket::{
+    data::ToByteUnit as _,
+    routes,
+    tokio::{self, select, sync::broadcast::Receiver, time},
+};
 
 #[rocket::main]
 async fn main() {
@@ -39,14 +44,22 @@ async fn main() {
     let database = Arc::new(RwLock::new(
         Mochibase::open_or_new(&config.database_path).expect("Failed to open or create database"),
     ));
+    let chunkbase = Arc::new(RwLock::new(Chunkbase::default()));
     let local_db = database.clone();
+    let local_chunk = chunkbase.clone();
 
-    // Start monitoring thread, cleaning the database every 2 minutes
-    let (shutdown, rx) = tokio::sync::mpsc::channel(1);
+    let (shutdown, rx) = tokio::sync::broadcast::channel(1);
+    // Clean the database every 2 minutes
     tokio::spawn({
         let cleaner_db = database.clone();
         let file_path = config.file_dir.clone();
-        async move { clean_loop(cleaner_db, file_path, rx, TimeDelta::minutes(2)).await }
+        async move { clean_loop(cleaner_db, file_path, rx).await }
+    });
+    tokio::spawn({
+        let cleaner_db = database.clone();
+        let file_path = config.file_dir.clone();
+        let rx2 = shutdown.subscribe();
+        async move { clean_loop(cleaner_db, file_path, rx2).await }
     });
 
     let rocket = rocket::build()
@@ -65,7 +78,9 @@ async fn main() {
         .mount(
             config.server.root_path.clone() + "/",
             routes![
-                confetti_box::handle_upload,
+                confetti_box::chunked_upload_start,
+                confetti_box::chunked_upload_continue,
+                confetti_box::chunked_upload_finish,
                 endpoints::server_info,
                 endpoints::file_info,
                 endpoints::lookup_mmid,
@@ -74,6 +89,7 @@ async fn main() {
             ],
         )
         .manage(database)
+        .manage(chunkbase)
         .manage(config)
         .configure(rocket_config)
         .launch()
@@ -83,10 +99,7 @@ async fn main() {
     rocket.expect("Server failed to shutdown gracefully");
 
     info!("Stopping database cleaning thread...");
-    shutdown
-        .send(())
-        .await
-        .expect("Failed to stop cleaner thread.");
+    shutdown.send(()).expect("Failed to stop cleaner thread.");
     info!("Stopping database cleaning thread completed successfully.");
 
     info!("Saving database on shutdown...");
@@ -96,4 +109,38 @@ async fn main() {
         .save()
         .expect("Failed to save database");
     info!("Saving database completed successfully.");
+
+    info!("Deleting chunk data on shutdown...");
+    local_chunk
+        .write()
+        .unwrap()
+        .delete_all()
+        .expect("Failed to delete chunks");
+    info!("Deleting chunk data completed successfully.");
+}
+
+/// A loop to clean the database periodically.
+pub async fn clean_loop(
+    main_db: Arc<RwLock<Mochibase>>,
+    file_path: PathBuf,
+    mut shutdown_signal: Receiver<()>,
+) {
+    let mut interval = time::interval(TimeDelta::minutes(2).to_std().unwrap());
+    loop {
+        select! {
+            _ = interval.tick() => clean_database(&main_db, &file_path),
+            _ = shutdown_signal.recv() => break,
+        };
+    }
+}
+
+pub async fn clean_chunks(chunk_db: Arc<RwLock<Chunkbase>>, mut shutdown_signal: Receiver<()>) {
+    let mut interval = time::interval(TimeDelta::seconds(30).to_std().unwrap());
+
+    loop {
+        select! {
+            _ = interval.tick() => {let _ = chunk_db.write().unwrap().delete_timed_out();},
+            _ = shutdown_signal.recv() => break,
+        };
+    }
 }

src/pages.rs

@@ -11,6 +11,8 @@ pub fn head(page_title: &str) -> Markup {
         title { (page_title) }
         link rel="icon" type="image/svg+xml" href="/resources/favicon.svg";
         link rel="stylesheet" href="/resources/main.css";
+        link rel="preload" href="/resources/fonts/Roboto.woff2" as="font" type="font/woff2" crossorigin;
+        link rel="preload" href="/resources/fonts/FiraCode.woff2" as="font" type="font/woff2" crossorigin;
     }
 }
 

src/settings.rs

@@ -17,6 +17,10 @@ pub struct Settings {
     #[serde(default)]
     pub max_filesize: u64,
 
+    /// Maximum filesize in bytes
+    #[serde(default)]
+    pub chunk_size: u64,
+
     /// Is overwiting already uploaded files with the same hash allowed, or is
     /// this a no-op?
     #[serde(default)]
@@ -48,7 +52,8 @@ pub struct Settings {
 impl Default for Settings {
     fn default() -> Self {
         Self {
-            max_filesize: 1.megabytes().into(), // 128 MB
+            max_filesize: 25.megabytes().into(), // 1 MB
+            chunk_size: 1.megabytes().into(),
             overwrite: true,
             duration: DurationSettings::default(),
             server: ServerSettings::default(),
@@ -81,11 +86,11 @@ impl 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!");
+        let out_path = &self.path.with_extension("new");
+        let mut file = File::create(out_path)?;
         file.write_all(&toml::to_string_pretty(self).unwrap().into_bytes())?;
 
+        // Overwrite the original DB with
         fs::rename(out_path, &self.path).unwrap();
 
         Ok(())

src/utils.rs

@@ -1,7 +1,7 @@
 use blake3::Hash;
 use std::path::Path;
 
-/// Get the Blake3 hash of a file, without reading it all into memory, and also get the size
+/// Get the Blake3 hash of a file, without reading it all into memory
 pub async fn hash_file<P: AsRef<Path>>(input: &P) -> Result<Hash, std::io::Error> {
     let mut hasher = blake3::Hasher::new();
     hasher.update_mmap_rayon(input)?;

web/request.js

@@ -10,7 +10,7 @@ async function formSubmit() {
     const duration = form.elements.duration.value;
     const maxSize = form.elements.fileUpload.dataset.maxFilesize;
 
-    await sendFile(files, duration, maxSize);
+    await sendFiles(files, duration, maxSize);
 
     // Reset the form file data since we've successfully submitted it
     form.elements.fileUpload.value = "";
@@ -19,6 +19,7 @@ async function formSubmit() {
 async function dragDropSubmit(evt) {
     const form = document.getElementById("uploadForm");
     const duration = form.elements.duration.value;
+    const maxSize = form.elements.fileUpload.dataset.maxFilesize;
 
     evt.preventDefault();
 
@@ -38,12 +39,13 @@ async function dragDropSubmit(evt) {
         });
     }
 
-    await sendFile(files, duration);
+    await sendFiles(files, duration, maxSize);
 }
 
 async function pasteSubmit(evt) {
     const form = document.getElementById("uploadForm");
     const duration = form.elements.duration.value;
+    const maxSize = form.elements.fileUpload.dataset.maxFilesize;
 
     const files = [];
     const len = evt.clipboardData.files.length;
@@ -52,45 +54,145 @@ async function pasteSubmit(evt) {
         files.push(file);
     }
 
-    await sendFile(files, duration);
+    await sendFiles(files, duration, maxSize);
 }
 
-async function sendFile(files, duration, maxSize) {
+async function sendFiles(files, duration, maxSize) {
+    const inProgressUploads = new Set();
+    const concurrencyLimit = 10;
+
     for (const file of files) {
-        const [linkRow, progressBar, progressText] = addNewToList(file.name);
-        if (file.size > maxSize) {
-            makeErrored(progressBar, progressText, linkRow, TOO_LARGE_TEXT);
-            console.error("Provided file is too large", file.size, "bytes; max", maxSize, "bytes");
-            continue;
-        } else if (file.size == 0) {
-            makeErrored(progressBar, progressText, linkRow, ZERO_TEXT);
-            console.error("Provided file has 0 bytes");
-            continue;
+        // Start the upload and add it to the set of in-progress uploads
+        const uploadPromise = uploadFile(file, duration, maxSize);
+        inProgressUploads.add(uploadPromise);
+
+        // Once an upload finishes, remove it from the set
+        uploadPromise.finally(() => inProgressUploads.delete(uploadPromise));
+
+        // If we reached the concurrency limit, wait for one of the uploads to complete
+        if (inProgressUploads.size >= concurrencyLimit) {
+            await Promise.race(inProgressUploads);
         }
+    }
 
-        const request = new XMLHttpRequest();
-        request.open('POST', "./upload", true);
+    // Wait for any remaining uploads to complete
+    await Promise.allSettled(inProgressUploads);
+}
 
-        // Set up event listeners
-        request.upload.addEventListener('progress',
-            (p) => {uploadProgress(p, progressBar, progressText, linkRow);}, false);
-        request.addEventListener('load',
-            (c) => {uploadComplete(c, progressBar, progressText, linkRow);}, false);
-        request.addEventListener('error',
-            (e) => {networkErrorHandler(e, progressBar, progressText, linkRow);}, false);
+async function uploadFile(file, duration, maxSize) {
+    const [linkRow, progressBar, progressText] = await addNewToList(file.name);
+    if (file.size > maxSize) {
+        console.error("Provided file is too large", file.size, "bytes; max", maxSize, "bytes");
+        makeErrored(progressBar, progressText, linkRow, TOO_LARGE_TEXT);
+        return;
+    } else if (file.size == 0) {
+        console.error("Provided file has 0 bytes");
+        makeErrored(progressBar, progressText, linkRow, ZERO_TEXT);
+        return;
+    }
 
-        linkRow.classList.add("upload_inprogress");
-
-        // Create and send FormData
-        try {
-            const formData = new FormData();
-            formData.append("duration", duration);
-            formData.append("fileUpload", file);
-            request.send(formData);
-        } catch (e) {
-            makeErrored(progressBar, progressText, linkRow, ERROR_TEXT);
-            console.error("An error occured while uploading", e);
+    // Get preliminary upload information
+    let chunkedResponse;
+    try {
+        const response = await fetch("/upload/chunked", {
+            method: "POST",
+            body: JSON.stringify({
+                "name": file.name,
+                "size": file.size,
+                "expire_duration": parseInt(duration),
+            }),
+        });
+        if (!response.ok) {
+            throw new Error(`Response status: ${response.status}`);
         }
+        chunkedResponse = await response.json();
+    } catch (error) {
+        console.error(error);
+        makeErrored(progressBar, progressText, linkRow, ERROR_TEXT);
+    }
+
+    // Upload the file in `chunk_size` chunks
+    const chunkUploads = new Set();
+    const progressValues = [];
+    const concurrencyLimit = 4;
+    for (let start = 0; start < file.size; start += chunkedResponse.chunk_size) {
+        const chunk = file.slice(start, start + chunkedResponse.chunk_size)
+        const url = "/upload/chunked/" + chunkedResponse.uuid + "?offset=" + start;
+        const ID = progressValues.push(0);
+
+        let upload = new Promise(function (resolve, reject) {
+            let request = new XMLHttpRequest();
+            request.open("POST", url, true);
+            request.upload.addEventListener('progress',
+                (p) => {uploadProgress(p, progressBar, progressText, progressValues, file.size, ID);}, true
+            );
+
+            request.onload = (e) => {
+                if (e.target.status >= 200 && e.target.status < 300) {
+                    resolve(request.response);
+                } else {
+                    reject({status: e.target.status, statusText: request.statusText});
+                }
+            };
+            request.onerror = (e) => {
+                reject({status: e.target.status, statusText: request.statusText})
+            };
+            request.send(chunk);
+        });
+
+        chunkUploads.add(upload);
+        upload.finally(() => chunkUploads.delete(upload));
+        if (chunkUploads.size >= concurrencyLimit) {
+            await Promise.race(chunkUploads);
+        }
+    }
+    await Promise.allSettled(chunkUploads);
+
+    // Finish the request and update the progress box
+    const result = await fetch("/upload/chunked/" + chunkedResponse.uuid + "?finish");
+    uploadComplete(result, progressBar, progressText, linkRow);
+}
+
+async function addNewToList(origFileName) {
+    const uploadedFilesDisplay = document.getElementById("uploadedFilesDisplay");
+    const linkRow = uploadedFilesDisplay.appendChild(document.createElement("div"));
+    const fileName = linkRow.appendChild(document.createElement("p"));
+    const progressBar = linkRow.appendChild(document.createElement("progress"));
+    const progressTxt = linkRow.appendChild(document.createElement("p"));
+
+    fileName.textContent = origFileName;
+    fileName.classList.add("file_name");
+    progressTxt.classList.add("status");
+    progressBar.max="100";
+    progressBar.value="0";
+
+    return [linkRow, progressBar, progressTxt];
+}
+
+function uploadProgress(progress, progressBar, progressText, progressValues, fileSize, ID) {
+    if (progress.lengthComputable) {
+        progressValues[ID] = progress.loaded;
+
+        const progressPercent = Math.floor((progressValues.reduce((a, b) => a + b, 0) / fileSize) * 100);
+        if (progressPercent == 100) {
+            progressBar.removeAttribute("value");
+            progressText.textContent = "⏳";
+        } else {
+            progressBar.value = progressPercent;
+            progressText.textContent = progressPercent + "%";
+        }
+    }
+}
+
+async function uploadComplete(response, progressBar, progressText, linkRow) {
+    if (response.status === 200) {
+        const responseJson = await response.json();
+        console.log("Successfully uploaded file", responseJson);
+        makeFinished(progressBar, progressText, linkRow, responseJson);
+    } else if (response.status === 413) {
+        makeErrored(progressBar, progressText, linkRow, TOO_LARGE_TEXT);
+    } else {
+        makeErrored(progressBar, progressText, linkRow, ERROR_TEXT);
     }
 }
 
@@ -128,60 +230,6 @@ function makeFinished(progressBar, progressText, linkRow, response) {
     linkRow.classList.add("upload_done");
 }
 
-function networkErrorHandler(err, progressBar, progressText, linkRow) {
-    makeErrored(progressBar, progressText, linkRow, "A network error occured");
-    console.error("A network error occured while uploading", err);
-}
-
-function uploadProgress(progress, progressBar, progressText, _linkRow) {
-    if (progress.lengthComputable) {
-        const progressPercent = Math.floor((progress.loaded / progress.total) * 100);
-        if (progressPercent == 100) {
-            progressBar.removeAttribute("value");
-            progressText.textContent = "⏳";
-        } else {
-            progressBar.value = progressPercent;
-            progressText.textContent = progressPercent + "%";
-        }
-    }
-}
-
-function uploadComplete(response, progressBar, progressText, linkRow) {
-    let target = response.target;
-
-    if (target.status === 200) {
-        const response = JSON.parse(target.responseText);
-
-        if (response.status) {
-            console.log("Successfully uploaded file", response);
-            makeFinished(progressBar, progressText, linkRow, response);
-        } else {
-            console.error("Error uploading", response);
-            makeErrored(progressBar, progressText, linkRow, response.response);
-        }
-    } else if (target.status === 413) {
-        makeErrored(progressBar, progressText, linkRow, TOO_LARGE_TEXT);
-    } else {
-        makeErrored(progressBar, progressText, linkRow, ERROR_TEXT);
-    }
-}
-
-function addNewToList(origFileName) {
-    const uploadedFilesDisplay = document.getElementById("uploadedFilesDisplay");
-    const linkRow = uploadedFilesDisplay.appendChild(document.createElement("div"));
-    const fileName = linkRow.appendChild(document.createElement("p"));
-    const progressBar = linkRow.appendChild(document.createElement("progress"));
-    const progressTxt = linkRow.appendChild(document.createElement("p"));
-
-    fileName.textContent = origFileName;
-    fileName.classList.add("file_name");
-    progressTxt.classList.add("status");
-    progressBar.max="100";
-    progressBar.value="0";
-
-    return [linkRow, progressBar, progressTxt];
-}
-
 async function initEverything() {
     const durationBox = document.getElementById("durationBox");
     const durationButtons = durationBox.getElementsByTagName("button");
@@ -190,7 +238,7 @@ async function initEverything() {
             if (this.classList.contains("selected")) {
                 return;
             }
-            document.getElementById("uploadForm").elements.duration.value = this.dataset.durationSeconds + "s";
+            document.getElementById("uploadForm").elements.duration.value = this.dataset.durationSeconds;
             let selected = this.parentNode.getElementsByClassName("selected");
             selected[0].classList.remove("selected");
             this.classList.add("selected");