Run clippy

src/cache/fs.rs

@@ -28,7 +28,7 @@ use tokio::time::Sleep;
 /// up to Client A's request, then Client B could receive a broken image, as it
 /// thinks it's done reading the file.
 ///
-/// We effectively use WRITING_STATUS as a status relay to ensure concurrent
+/// We effectively use `WRITING_STATUS` as a status relay to ensure concurrent
 /// reads to the file while it's being written to will wait for writing to be
 /// completed.
 static WRITING_STATUS: Lazy<RwLock<HashMap<PathBuf, Arc<CacheStatus>>>> =
@@ -40,8 +40,7 @@ pub async fn read_file(path: &Path) -> Option<Result<FromFsStream, std::io::Erro
         let status = WRITING_STATUS
             .read()
             .get(path)
-            .map(Arc::clone)
-            .unwrap_or_else(|| Arc::new(CacheStatus::done()));
+            .map_or_else(|| Arc::new(CacheStatus::done()), Arc::clone);
 
         Some(FromFsStream::new(path, status).await)
     } else {
@@ -69,18 +68,17 @@ pub async fn transparent_file_stream(
     let path_buf = path.to_path_buf();
     tokio::spawn(async move {
         let path_buf = path_buf; // moves path buf into async
-        let mut was_errored = false;
+        let mut errored = false;
         while let Some(bytes) = byte_stream.next().await {
-            match bytes {
-                Ok(bytes) => file.write_all(&bytes).await?,
-                Err(_) => {
-                    was_errored = true;
-                    break;
-                }
+            if let Ok(bytes) = bytes {
+                file.write_all(&bytes).await?
+            } else {
+                errored = true;
+                break;
             }
         }
 
-        if was_errored {
+        if errored {
             // It's ok if the deleting the file fails, since we truncate on
             // create anyways, but it should be best effort
             let _ = remove_file(&path_buf).await;
@@ -92,7 +90,7 @@ pub async fn transparent_file_stream(
         let mut write_lock = WRITING_STATUS.write();
         // This needs to be written atomically with the write lock, else
         // it's possible we have an inconsistent state
-        if was_errored {
+        if errored {
             write_flag.store(WritingStatus::Error);
         } else {
             write_flag.store(WritingStatus::Done);

src/cache/generational.rs

@@ -11,17 +11,17 @@ use super::{Cache, CacheKey, CachedImage, ImageMetadata};
 
 pub struct GenerationalCache {
     in_memory: LruCache<CacheKey, (CachedImage, ImageMetadata)>,
-    memory_max_size: usize,
-    memory_cur_size: usize,
+    memory_max_size: u64,
+    memory_cur_size: u64,
 
     on_disk: LruCache<CacheKey, ImageMetadata>,
     disk_path: PathBuf,
-    disk_max_size: usize,
-    disk_cur_size: usize,
+    disk_max_size: u64,
+    disk_cur_size: u64,
 }
 
 impl GenerationalCache {
-    pub fn new(memory_max_size: usize, disk_max_size: usize, disk_path: PathBuf) -> Self {
+    pub fn new(memory_max_size: u64, disk_max_size: u64, disk_path: PathBuf) -> Self {
         Self {
             in_memory: LruCache::unbounded(),
             memory_max_size,
@@ -38,9 +38,9 @@ impl GenerationalCache {
         let new_img_size = image.0.len();
         let mut to_drop = vec![];
 
-        if self.disk_max_size >= new_img_size {
+        if self.disk_max_size >= new_img_size as u64 {
             // Add images to drop from cold cache into a queue
-            while new_img_size + self.disk_cur_size > self.disk_max_size {
+            while new_img_size as u64 + self.disk_cur_size > self.disk_max_size {
                 match self.on_disk.pop_lru() {
                     Some((key, _)) => {
                         let mut path = self.disk_path.clone();
@@ -72,7 +72,7 @@ impl GenerationalCache {
                                 })
                                 .unwrap_or_default();
 
-                            self.disk_cur_size -= file_size as usize;
+                            self.disk_cur_size -= file_size;
                         }
 
                         to_drop.push(path);
@@ -102,7 +102,7 @@ impl GenerationalCache {
 
         let new_key_path = {
             let mut root = self.disk_path.clone();
-            root.push(PathBuf::from(&key));
+            root.push(PathBuf::from(key.clone()));
             root
         };
 
@@ -112,7 +112,7 @@ impl GenerationalCache {
                 match file.write_all(&image.0).await {
                     Ok(_) => {
                         self.on_disk.put(key, metadata);
-                        self.disk_cur_size += new_img_size;
+                        self.disk_cur_size += new_img_size as u64;
                         debug!(
                             "Successfully written data to disk for file {:?}",
                             new_key_path
@@ -140,18 +140,16 @@ impl Cache for GenerationalCache {
         if let Some(metadata) = self.on_disk.pop(key) {
             let new_key_path = {
                 let mut root = self.disk_path.clone();
-                root.push(PathBuf::from(key));
+                root.push(PathBuf::from(key.clone()));
                 root
             };
 
             // extract from disk, if it exists
-            let file = File::open(new_key_path.clone()).await;
+            let file = File::open(&new_key_path).await;
 
-            let mut buffer = if let Some(size) = metadata.content_length {
-                Vec::with_capacity(size)
-            } else {
-                Vec::new()
-            };
+            let mut buffer = metadata
+                .content_length
+                .map_or_else(Vec::new, Vec::with_capacity);
 
             match file {
                 Ok(mut file) => {
@@ -159,7 +157,7 @@ impl Cache for GenerationalCache {
                         Ok(_) => {
                             // We don't particularly care if we fail to delete from disk since
                             // if it's an error it means it's already been dropped.
-                            tokio::spawn(remove_file(new_key_path.clone()));
+                            tokio::spawn(remove_file(new_key_path));
                         }
                         Err(e) => {
                             warn!("Failed to read from {:?}: {}", new_key_path, e);
@@ -174,7 +172,7 @@ impl Cache for GenerationalCache {
 
             buffer.shrink_to_fit();
 
-            self.disk_cur_size -= buffer.len();
+            self.disk_cur_size -= buffer.len() as u64;
             let image = CachedImage(Bytes::from(buffer));
 
             // Since we just put it in the in-memory cache it should be there
@@ -189,14 +187,14 @@ impl Cache for GenerationalCache {
     #[inline]
     async fn put(&mut self, key: CacheKey, image: CachedImage, metadata: ImageMetadata) {
         let mut hot_evicted = vec![];
-        let new_img_size = image.0.len();
+        let new_img_size = image.0.len() as u64;
 
         if self.memory_max_size >= new_img_size {
             // Evict oldest entires to make space for new image.
             while new_img_size + self.memory_cur_size > self.memory_max_size {
                 match self.in_memory.pop_lru() {
                     Some((key, (image, metadata))) => {
-                        self.memory_cur_size -= image.0.len();
+                        self.memory_cur_size -= image.0.len() as u64;
                         hot_evicted.push((key, image, metadata));
                     }
                     None => unreachable!(concat!(

src/cache/low_mem.rs

@@ -31,7 +31,7 @@ impl LowMemCache {
 impl Cache for LowMemCache {
     async fn get_stream(&mut self, key: &CacheKey) -> Option<Result<FromFsStream, std::io::Error>> {
         if self.on_disk.get(key).is_some() {
-            super::fs::read_file(&Path::new(&key.to_string())).await
+            super::fs::read_file(Path::new(&key.to_string())).await
         } else {
             None
         }

src/cache/mod.rs

@@ -1,5 +1,5 @@
-use std::fmt::Display;
 use std::path::PathBuf;
+use std::{fmt::Display, str::FromStr};
 
 use actix_web::http::HeaderValue;
 use async_trait::async_trait;
@@ -36,19 +36,54 @@ impl From<CacheKey> for PathBuf {
     }
 }
 
-impl From<&CacheKey> for PathBuf {
+pub struct CachedImage(pub Bytes);
+
+#[derive(Copy, Clone)]
+pub struct ImageMetadata {
+    pub content_type: Option<ImageContentType>,
+    pub content_length: Option<usize>,
+    pub last_modified: Option<DateTime<FixedOffset>>,
+}
+
+// Note to self: If these are wrong blame Triscuit 9
+#[derive(Copy, Clone)]
+pub enum ImageContentType {
+    Png,
+    Jpeg,
+    Gif,
+    Bmp,
+    Tif,
+}
+
+pub struct InvalidContentType;
+
+impl FromStr for ImageContentType {
+    type Err = InvalidContentType;
+
     #[inline]
-    fn from(key: &CacheKey) -> Self {
-        key.to_string().into()
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        match s {
+            "image/png" => Ok(Self::Png),
+            "image/jpeg" => Ok(Self::Jpeg),
+            "image/gif" => Ok(Self::Gif),
+            "image/bmp" => Ok(Self::Bmp),
+            "image/tif" => Ok(Self::Tif),
+            _ => Err(InvalidContentType),
+        }
     }
 }
 
-pub struct CachedImage(pub Bytes);
-
-pub struct ImageMetadata {
-    pub content_type: Option<String>,
-    pub content_length: Option<usize>,
-    pub last_modified: Option<DateTime<FixedOffset>>,
+impl AsRef<str> for ImageContentType {
+    #[inline]
+    fn as_ref(&self) -> &str {
+        match self {
+            Self::Png => "image/png",
+            Self::Jpeg => "image/jpeg",
+            Self::Gif => "image/gif",
+            Self::Bmp => "image/bmp",
+            Self::Tif => "image/tif",
+        }
+    }
 }
 
 #[derive(Debug)]
@@ -66,7 +101,10 @@ impl ImageMetadata {
     ) -> Result<Self, ImageRequestError> {
         Ok(Self {
             content_type: content_type
-                .map(|v| v.to_str().map(|v| v.to_string()))
+                .map(|v| match v.to_str() {
+                    Ok(v) => ImageContentType::from_str(v),
+                    Err(_) => Err(InvalidContentType),
+                })
                 .transpose()
                 .map_err(|_| ImageRequestError::InvalidContentType)?,
             content_length: content_length

src/config.rs

@@ -1,4 +1,4 @@
-use std::num::{NonZeroU16, NonZeroUsize};
+use std::num::{NonZeroU16, NonZeroU64};
 use std::path::PathBuf;
 use std::sync::atomic::AtomicBool;
 
@@ -18,17 +18,17 @@ pub struct CliArgs {
     /// How large, in bytes, the in-memory cache should be. Note that this does
     /// not include runtime memory usage.
     #[clap(long, env = "MEM_CACHE_QUOTA_BYTES")]
-    pub memory_quota: NonZeroUsize,
+    pub memory_quota: NonZeroU64,
     /// How large, in bytes, the on-disk cache should be. Note that actual
     /// values may be larger for metadata information.
     #[clap(long, env = "DISK_CACHE_QUOTA_BYTES")]
-    pub disk_quota: usize,
+    pub disk_quota: u64,
     /// Sets the location of the disk cache.
     #[clap(long, default_value = "./cache", env = "DISK_CACHE_PATH")]
     pub cache_path: PathBuf,
     /// The network speed to advertise to Mangadex@Home control server.
     #[clap(long, env = "MAX_NETWORK_SPEED")]
-    pub network_speed: NonZeroUsize,
+    pub network_speed: NonZeroU64,
     /// Whether or not to provide the Server HTTP header to clients. This is
     /// useful for debugging, but is generally not recommended for security
     /// reasons.

src/ping.rs

@@ -1,6 +1,6 @@
 use std::{io::BufReader, sync::Arc};
 use std::{
-    num::{NonZeroU16, NonZeroUsize},
+    num::{NonZeroU16, NonZeroU64},
     sync::atomic::Ordering,
 };
 
@@ -27,9 +27,9 @@ pub const CONTROL_CENTER_PING_URL: &str = "https://api.mangadex.network/ping";
 pub struct Request<'a> {
     secret: &'a str,
     port: NonZeroU16,
-    disk_space: usize,
-    network_speed: NonZeroUsize,
-    build_version: usize,
+    disk_space: u64,
+    network_speed: NonZeroU64,
+    build_version: u64,
     tls_created_at: Option<String>,
 }
 

src/routes.rs

@@ -273,7 +273,7 @@ fn construct_response(cached: &CachedImage, metadata: &ImageMetadata) -> ServerR
         .collect();
     let mut resp = HttpResponse::Ok();
     if let Some(content_type) = &metadata.content_type {
-        resp.append_header((CONTENT_TYPE, &**content_type));
+        resp.append_header((CONTENT_TYPE, content_type.as_ref()));
     }
     if let Some(content_length) = &metadata.content_length {
         resp.append_header((CONTENT_LENGTH, content_length.to_string()));