make favicon brighter

Cargo.lock

@@ -150,12 +150,6 @@ version = "0.22.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "72b3254f16251a8381aa12e40e3c4d2f0199f8c6508fbecb9d91f575e0fbb8c6"
 
-[[package]]
-name = "bitflags"
-version = "1.3.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
-
 [[package]]
 name = "bitflags"
 version = "2.5.0"
@@ -187,6 +181,18 @@ version = "3.16.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "79296716171880943b8470b5f8d03aa55eb2e645a4874bdbb28adb49162e012c"
 
+[[package]]
+name = "bytemuck"
+version = "1.16.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b236fc92302c97ed75b38da1f4917b5cdda4984745740f153a5d3059e48d725e"
+
+[[package]]
+name = "byteorder"
+version = "1.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1fd0f2584146f6f2ef48085050886acf353beff7305ebd1ae69500e27c67f64b"
+
 [[package]]
 name = "bytes"
 version = "1.6.0"
@@ -239,9 +245,9 @@ dependencies = [
 
 [[package]]
 name = "chrono-tz"
-version = "0.8.6"
+version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d59ae0466b83e838b81a54256c39d5d7c20b9d7daa10510a242d9b75abd5936e"
+checksum = "93698b29de5e97ad0ae26447b344c482a7284c737d9ddc5f9e52b74a336671bb"
 dependencies = [
  "chrono",
  "chrono-tz-build",
@@ -250,9 +256,9 @@ dependencies = [
 
 [[package]]
 name = "chrono-tz-build"
-version = "0.2.1"
+version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "433e39f13c9a060046954e0592a8d0a4bcb1040125cbf91cb8ee58964cfb350f"
+checksum = "0c088aee841df9c3041febbb73934cfc39708749bf96dc827e3359cd39ef11b1"
 dependencies = [
  "parse-zoneinfo",
  "phf",
@@ -261,9 +267,9 @@ dependencies = [
 
 [[package]]
 name = "clap"
-version = "4.5.4"
+version = "4.5.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "90bc066a67923782aa8515dbaea16946c5bcc5addbd668bb80af688e53e548a0"
+checksum = "5db83dced34638ad474f39f250d7fea9598bdd239eaced1bdf45d597da0f433f"
 dependencies = [
  "clap_builder",
  "clap_derive",
@@ -271,9 +277,9 @@ dependencies = [
 
 [[package]]
 name = "clap_builder"
-version = "4.5.2"
+version = "4.5.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ae129e2e766ae0ec03484e609954119f123cc1fe650337e155d03b022f24f7b4"
+checksum = "f7e204572485eb3fbf28f871612191521df159bc3e15a9f5064c66dba3a8c05f"
 dependencies = [
  "anstream",
  "anstyle",
@@ -283,9 +289,9 @@ dependencies = [
 
 [[package]]
 name = "clap_derive"
-version = "4.5.4"
+version = "4.5.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "528131438037fd55894f62d6e9f068b8f45ac57ffa77517819645d10aed04f64"
+checksum = "c780290ccf4fb26629baa7a1081e68ced113f1d3ec302fa5948f1c381ebf06c6"
 dependencies = [
  "heck",
  "proc-macro2",
@@ -447,6 +453,12 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "either"
+version = "1.13.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "60b1af1c220855b6ceac025d3f6ecdd2b7c4894bfe9cd9bda4fbb4bc7c0d4cf0"
+
 [[package]]
 name = "equivalent"
 version = "1.0.1"
@@ -601,11 +613,11 @@ dependencies = [
 
 [[package]]
 name = "globwalk"
-version = "0.8.1"
+version = "0.9.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "93e3af942408868f6934a7b85134a3230832b9977cf66125df2f9edcfce4ddcc"
+checksum = "0bf760ebf69878d9fd8f110c89703d90ce35095324d1f1edcb595c63945ee757"
 dependencies = [
- "bitflags 1.3.2",
+ "bitflags",
  "ignore",
  "walkdir",
 ]
@@ -832,6 +844,20 @@ dependencies = [
  "winapi-util",
 ]
 
+[[package]]
+name = "image"
+version = "0.25.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fd54d660e773627692c524beaad361aca785a4f9f5730ce91f42aabe5bce3d11"
+dependencies = [
+ "bytemuck",
+ "byteorder",
+ "num-traits",
+ "rayon",
+ "zune-core",
+ "zune-jpeg",
+]
+
 [[package]]
 name = "indexmap"
 version = "1.9.3"
@@ -912,11 +938,12 @@ checksum = "78b3ae25bc7c8c38cec158d1f2757ee79e9b3740fbc7ccf0e59e4b08d793fa89"
 
 [[package]]
 name = "little-hesinde"
-version = "0.2.3"
+version = "0.3.1"
 dependencies = [
  "calibre-db",
  "clap",
  "ignore",
+ "image",
  "once_cell",
  "poem",
  "quick-xml",
@@ -924,6 +951,7 @@ dependencies = [
  "serde",
  "serde_json",
  "serde_with",
+ "sha2",
  "tera",
  "thiserror",
  "time",
@@ -1005,7 +1033,7 @@ version = "0.28.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ab2156c4fce2f8df6c499cc1c763e4394b7482525bf2a9701c9d79d215f519e4"
 dependencies = [
- "bitflags 2.5.0",
+ "bitflags",
  "cfg-if",
  "cfg_aliases",
  "libc",
@@ -1208,9 +1236,9 @@ checksum = "d231b230927b5e4ad203db57bbcbee2802f6bce620b1e4a9024a07d94e2907ec"
 
 [[package]]
 name = "poem"
-version = "3.0.0"
+version = "3.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8b735eaaaa6bc7ed2dcbcab1d5373afe1f6d03a37d8695ba3c42101f733a8455"
+checksum = "e88b6912ed1e8833d7c22c9c986c517f4518d7d37e3c04566d917c789aaea591"
 dependencies = [
  "bytes",
  "futures-util",
@@ -1356,13 +1384,33 @@ dependencies = [
  "getrandom",
 ]
 
+[[package]]
+name = "rayon"
+version = "1.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b418a60154510ca1a002a752ca9714984e21e4241e804d32555251faf8b78ffa"
+dependencies = [
+ "either",
+ "rayon-core",
+]
+
+[[package]]
+name = "rayon-core"
+version = "1.12.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1465873a3dfdaa8ae7cb14b4383657caab0b3e8a0aa9ae8e04b044854c8dfce2"
+dependencies = [
+ "crossbeam-deque",
+ "crossbeam-utils",
+]
+
 [[package]]
 name = "redox_syscall"
 version = "0.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "469052894dcb553421e483e4209ee581a45100d31b4018de03e5a7ad86374a7e"
 dependencies = [
- "bitflags 2.5.0",
+ "bitflags",
 ]
 
 [[package]]
@@ -1409,7 +1457,7 @@ version = "0.31.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b838eba278d213a8beaf485bd313fd580ca4505a00d5871caeb1457c55322cae"
 dependencies = [
- "bitflags 2.5.0",
+ "bitflags",
  "fallible-iterator",
  "fallible-streaming-iterator",
  "hashlink",
@@ -1420,9 +1468,9 @@ dependencies = [
 
 [[package]]
 name = "rust-embed"
-version = "8.3.0"
+version = "8.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fb78f46d0066053d16d4ca7b898e9343bc3530f71c61d5ad84cd404ada068745"
+checksum = "19549741604902eb99a7ed0ee177a0663ee1eda51a29f71401f166e47e77806a"
 dependencies = [
  "rust-embed-impl",
  "rust-embed-utils",
@@ -1431,9 +1479,9 @@ dependencies = [
 
 [[package]]
 name = "rust-embed-impl"
-version = "8.3.0"
+version = "8.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b91ac2a3c6c0520a3fb3dd89321177c3c692937c4eb21893378219da10c44fc8"
+checksum = "cb9f96e283ec64401f30d3df8ee2aaeb2561f34c824381efa24a35f79bf40ee4"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1444,9 +1492,9 @@ dependencies = [
 
 [[package]]
 name = "rust-embed-utils"
-version = "8.3.0"
+version = "8.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "86f69089032567ffff4eada41c573fc43ff466c7db7c5688b2e7969584345581"
+checksum = "38c74a686185620830701348de757fd36bef4aa9680fd23c49fc539ddcc1af32"
 dependencies = [
  "sha2",
  "walkdir",
@@ -1464,7 +1512,7 @@ version = "0.38.34"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "70dc5ec042f7a43c4a73241207cecc9873a06d45debb38b329f8541d85c2730f"
 dependencies = [
- "bitflags 2.5.0",
+ "bitflags",
  "errno",
  "libc",
  "linux-raw-sys",
@@ -1503,18 +1551,18 @@ checksum = "94143f37725109f92c262ed2cf5e59bce7498c01bcc1502d7b9afe439a4e9f49"
 
 [[package]]
 name = "serde"
-version = "1.0.200"
+version = "1.0.203"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ddc6f9cc94d67c0e21aaf7eda3a010fd3af78ebf6e096aa6e2e13c79749cce4f"
+checksum = "7253ab4de971e72fb7be983802300c30b5a7f0c2e56fab8abfc6a214307c0094"
 dependencies = [
  "serde_derive",
 ]
 
 [[package]]
 name = "serde_derive"
-version = "1.0.200"
+version = "1.0.203"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "856f046b9400cee3c8c94ed572ecdb752444c24528c035cd35882aad6f492bcb"
+checksum = "500cbc0ebeb6f46627f50f3f5811ccf6bf00643be300b4c3eabc0ef55dc5b5ba"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1523,9 +1571,9 @@ dependencies = [
 
 [[package]]
 name = "serde_json"
-version = "1.0.116"
+version = "1.0.118"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3e17db7126d17feb94eb3fad46bf1a96b034e8aacbc2e775fe81505f8b0b2813"
+checksum = "d947f6b3163d8857ea16c4fa0dd4840d52f3041039a85decd46867eb1abef2e4"
 dependencies = [
  "itoa",
  "ryu",
@@ -1707,9 +1755,9 @@ dependencies = [
 
 [[package]]
 name = "tera"
-version = "1.19.1"
+version = "1.20.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "970dff17c11e884a4a09bc76e3a17ef71e01bb13447a11e85226e254fe6d10b8"
+checksum = "ab9d851b45e865f178319da0abdbfe6acbc4328759ff18dafc3a41c16b4cd2ee"
 dependencies = [
  "chrono",
  "chrono-tz",
@@ -1790,9 +1838,9 @@ dependencies = [
 
 [[package]]
 name = "tokio"
-version = "1.37.0"
+version = "1.38.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1adbebffeca75fcfd058afa480fb6c0b81e165a0323f9c9d39c9697e37c46787"
+checksum = "ba4f4a02a7a80d6f274636f0aa95c7e383b912d41fe721a31f29e29698585a4a"
 dependencies = [
  "backtrace",
  "bytes",
@@ -1808,9 +1856,9 @@ dependencies = [
 
 [[package]]
 name = "tokio-macros"
-version = "2.2.0"
+version = "2.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5b8a1e28f2deaa14e508979454cb3a223b10b938b45af148bc0986de36f1923b"
+checksum = "5f5ae998a069d4b5aba8ee9dad856af7d520c3699e6159b185c2acd48155d39a"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1998,9 +2046,9 @@ checksum = "711b9620af191e0cdc7468a8d14e709c3dcdb115b36f838e601583af800a370a"
 
 [[package]]
 name = "uuid"
-version = "1.8.0"
+version = "1.9.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a183cf7feeba97b4dd1c0d46788634f6221d87fa961b305bed08c851829efcc0"
+checksum = "5de17fd2f7da591098415cff336e12965a28061ddace43b59cb3c430179c9439"
 dependencies = [
  "getrandom",
  "rand",
@@ -2338,3 +2386,18 @@ dependencies = [
  "once_cell",
  "simd-adler32",
 ]
+
+[[package]]
+name = "zune-core"
+version = "0.4.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3f423a2c17029964870cfaabb1f13dfab7d092a62a29a89264f4d36990ca414a"
+
+[[package]]
+name = "zune-jpeg"
+version = "0.4.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ec866b44a2a1fd6133d363f073ca1b179f438f99e7e5bfb1e33f7181facfe448"
+dependencies = [
+ "zune-core",
+]

Cargo.toml

@@ -5,8 +5,8 @@ members = [
 ]
 
 [workspace.dependencies]
-serde = "1.0.200"
+serde = "1.0.203"
-thiserror = "1.0.59"
+thiserror = "1.0.61"
 time = { version = "0.3.36", features = ["macros", "serde", "formatting", "parsing" ] }
 
 [workspace.package]

Containerfile

@@ -1,5 +1,8 @@
 FROM docker.io/rust:1-alpine3.20 AS builder
 
+RUN mkdir /tmp/tmp
+RUN echo "hesinde:x:2222:2222:Linux User,,,:/:/app" > /passwd
+
 RUN apk --no-cache add \
   musl-dev
 
@@ -13,12 +16,16 @@ COPY . .
 RUN cargo build --release --target=$(arch)-unknown-linux-musl
 RUN cp "./target/$(arch)-unknown-linux-musl/release/little-hesinde" /app
 
-
 FROM scratch
 
+COPY --from=builder /passwd /etc/passwd
 COPY --from=builder /app /app
-CMD ["/app", "--listen-address", "[::]:3000", "--", "/library"]
+COPY --from=builder --chown=2222: /tmp/tmp /tmp
 
-ENV TMPDIR=/
+USER hesinde
-VOLUME ["/library"]
+
+CMD ["/app", "--listen-address", "[::]:3000", "--cache-path", "/tmp/cache", "--", "/library"]
+
+ENV TMPDIR=/tmp
+VOLUME ["/library", "/tmp"]
 EXPOSE 3000

README.md

@@ -37,12 +37,17 @@ From there on `cargo run` and `cargo build` and so on can be used.
 Usage: little-hesinde [OPTIONS] -- <LIBRARY_PATH>
 
 Arguments:
-  <LIBRARY_PATH>  Calibre library path
+  <LIBRARY_PATH>  Calibre library path [env: LIBRARY_PATH=]
 
 Options:
-  -l, --listen-address <LISTEN_ADDRESS>  Address to listen on [default: [::1]:3000]
+  -l, --listen-address <LISTEN_ADDRESS>
-  -h, --help                             Print help
+          Address to listen on [env: LISTEN_ADDRESS=] [default: [::1]:3000]
-  -V, --version                          Print version
+  -c, --cache-path <CACHE_PATH>
+          Cache path ($TMP cascades through $XDG_CACHE_HOME, $TMPDIR and /tmp) [env: CACHE_PATH=] [default: $TMP/little-hesinde]
+  -h, --help
+          Print help
+  -V, --version
+          Print version
 ```
 
 Example: `little-hesinde -l [::]4000 -- ~/Documents/library/`
@@ -61,7 +66,7 @@ Not planned, put a reverse proxy in front of it that handles access.
 
 ## How do I search?
 
-Putting in your search text and you are done. Searching is done on title, tags,
+Enter your search text and you are done. Searching is done on title, tags,
 author, series title, identifiers and comments.
 
 For more sophisticated queries take a look at the

calibre-db/src/calibre.rs

@@ -1,15 +1,16 @@
 //! Bundle all functions together.
 
-use std::path::Path;
+use std::path::{Path, PathBuf};
 
 use r2d2::Pool;
 use r2d2_sqlite::SqliteConnectionManager;
+use tempfile::NamedTempFile;
 
 use crate::{
     data::{
         author::Author, book::Book, error::DataStoreError, pagination::SortOrder, series::Series,
     },
-    search::{self, search},
+    search::search,
 };
 
 /// Top level calibre functions, bundling all sub functions in one place and providing secure access to
@@ -17,6 +18,7 @@ use crate::{
 #[derive(Debug, Clone)]
 pub struct Calibre {
     pool: Pool<SqliteConnectionManager>,
+    search_db_path: PathBuf,
 }
 
 impl Calibre {
@@ -27,16 +29,20 @@ impl Calibre {
         let manager = SqliteConnectionManager::file(path);
         let pool = r2d2::Pool::new(manager)?;
 
-        search::attach(&pool)?;
+        let tmpfile = NamedTempFile::new()?;
+        let (_, search_db_path) = tmpfile.keep()?;
 
-        Ok(Self { pool })
+        Ok(Self {
+            pool,
+            search_db_path,
+        })
     }
 
     /// Full text search with a query.
     ///
     /// See https://www.sqlite.org/fts5.html#full_text_query_syntax for syntax.
     pub fn search(&self, query: &str) -> Result<Vec<Book>, DataStoreError> {
-        search(query, &self.pool)
+        search(query, &self.pool, &self.search_db_path)
     }
 
     /// Fetch book data from calibre, starting at `cursor`, fetching up to an amount of `limit` and

calibre-db/src/search.rs

@@ -5,10 +5,11 @@
 //! virtual table leveraging fts5 (https://www.sqlite.org/fts5.html). Full-text search is run on
 //! that virtual table.
 
+use std::path::Path;
+
 use r2d2::{Pool, PooledConnection};
 use r2d2_sqlite::SqliteConnectionManager;
 use rusqlite::named_params;
-use tempfile::NamedTempFile;
 
 use crate::data::{book::Book, error::DataStoreError};
 
@@ -32,28 +33,53 @@ const SEARCH_INIT_QUERY: &str = "INSERT INTO search.fts(book_id, data)
       LEFT JOIN main.series AS s ON b2s.series = s.id
     GROUP BY b.id";
 
-/// Attach the fts temporary database to the read-only calibre database.
+/// Ensure the search database is attached to the connection and
-pub(crate) fn attach(pool: &Pool<SqliteConnectionManager>) -> Result<(), DataStoreError> {
+/// initializes the data if needed.
-    let conn = pool.get()?;
+fn ensure_search_db(
-    let tmpfile = NamedTempFile::new()?;
+    conn: &PooledConnection<SqliteConnectionManager>,
-    let (_, path) = tmpfile.keep()?;
+    db_path: &Path,
+) -> Result<(), DataStoreError> {
+    let mut stmt =
+        conn.prepare("SELECT COUNT() FROM pragma_database_list WHERE name = 'search'")?;
+    let count: u64 = stmt.query_row([], |x| x.get(0))?;
+    let need_attachment = count == 0;
 
+    if need_attachment {
+        attach(conn, db_path)?;
+        init(conn)?;
+    }
+
+    Ok(())
+}
+
+/// Attach the fts temporary database to the read-only calibre database.
+fn attach(
+    conn: &PooledConnection<SqliteConnectionManager>,
+    db_path: &Path,
+) -> Result<(), DataStoreError> {
     conn.execute(
-        &format!("ATTACH DATABASE '{}' AS search", path.to_string_lossy()),
+        &format!("ATTACH DATABASE '{}' AS search", db_path.to_string_lossy()),
         [],
     )?;
-    init(&conn)?;
+    init(conn)?;
 
     Ok(())
 }
 
 /// Initialise the fts virtual table.
 fn init(conn: &PooledConnection<SqliteConnectionManager>) -> Result<(), DataStoreError> {
-    conn.execute(
+    let mut stmt = conn
-        "CREATE VIRTUAL TABLE search.fts USING fts5(book_id, data)",
+        .prepare("SELECT COUNT() FROM search.sqlite_master WHERE type='table' AND name = 'fts'")?;
-        [],
+    let count: u64 = stmt.query_row([], |x| x.get(0))?;
-    )?;
+    let need_init = count == 0;
-    conn.execute(SEARCH_INIT_QUERY, [])?;
+
+    if need_init {
+        conn.execute(
+            "CREATE VIRTUAL TABLE search.fts USING fts5(book_id, data)",
+            [],
+        )?;
+        conn.execute(SEARCH_INIT_QUERY, [])?;
+    }
 
     Ok(())
 }
@@ -62,8 +88,10 @@ fn init(conn: &PooledConnection<SqliteConnectionManager>) -> Result<(), DataStor
 pub(crate) fn search(
     query: &str,
     pool: &Pool<SqliteConnectionManager>,
+    search_db_path: &Path,
 ) -> Result<Vec<Book>, DataStoreError> {
     let conn = pool.get()?;
+    ensure_search_db(&conn, search_db_path)?;
 
     let mut stmt =
         conn.prepare("SELECT book_id FROM search.fts WHERE data MATCH (:query) ORDER BY rank")?;

little-hesinde/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "little-hesinde"
-version = "0.2.3"
+version = "0.3.1"
 edition = "2021"
 license =  { workspace = true }
 authors =  { workspace = true }
@@ -9,21 +9,23 @@ description = "A very simple ebook server for a calibre library, providing a htm
 
 [dependencies]
 calibre-db = { path = "../calibre-db/", version = "0.1.0" }
-clap = { version = "4.5.4", features = ["derive"] }
+clap = { version = "4.5.7", features = ["derive", "env"] }
+image = { version = "0.25.1", default-features = false, features = ["jpeg", "rayon"] }
 once_cell = "1.19.0"
-poem = { version = "3.0.0", features = ["embed", "static-files"] }
+poem = { version = "3.0.1", features = ["embed", "static-files"] }
-rust-embed = "8.3.0"
+rust-embed = "8.4.0"
+sha2 = "0.10.8"
 serde = { workspace = true }
-serde_json = "1.0.116"
+serde_json = "1.0.118"
 serde_with = "3.8.1"
-tera = "1.19.1"
+tera = "1.20.0"
 thiserror = { workspace = true }
 time = { workspace = true }
-tokio = { version = "1.37.0", features = ["signal", "rt-multi-thread", "macros"] }
+tokio = { version = "1.38.0", features = ["signal", "rt-multi-thread", "macros"] }
 tokio-util = "0.7.11"
 tracing = "0.1.40"
 tracing-subscriber = "0.3.18"
-uuid = { version = "1.8.0", features = ["v4", "fast-rng"] }
+uuid = { version = "1.9.1", features = ["v4", "fast-rng"] }
 quick-xml = { version = "0.34.0", features = ["serialize"] }
 
 [build-dependencies]

little-hesinde/src/cache.rs

@@ -0,0 +1,87 @@
+//! Handle caching of files, specifically book covers.
+
+use std::{
+    fs::{self, File},
+    path::{Path, PathBuf},
+};
+
+use sha2::{
+    digest::{generic_array::GenericArray, typenum::U32},
+    Digest, Sha256,
+};
+use std::fmt::Write;
+use thiserror::Error;
+use tracing::debug;
+
+/// Errors from dealing with file caching.
+#[derive(Error, Debug)]
+pub enum CacheError {
+    /// Error converting a hash to its string representation.
+    #[error("failed to access thumbnail")]
+    HashError(#[from] std::fmt::Error),
+    /// Error creating a thumbnail for an image..
+    #[error("failed to create thumbnail")]
+    ImageError(#[from] image::ImageError),
+    /// Error accessing a thumbnail.
+    #[error("failed to access thumbnail")]
+    ThumbnailAccessError(#[from] std::io::Error),
+    /// Error accessing thumbnail directories.
+    #[error("failed to access thumbnail directory")]
+    ThumbnailPathError(PathBuf),
+}
+
+/// Convert a hash into its path representation inside the cache directory.
+///
+/// First hash character is the top folder, second character the second level folder and the rest
+/// is the filename.
+fn hash_to_path(hash: GenericArray<u8, U32>, cache_path: &Path) -> Result<PathBuf, CacheError> {
+    let mut hash_string = String::new();
+    for byte in hash {
+        write!(&mut hash_string, "{:02x}", byte)?;
+    }
+    let hash = hash_string;
+
+    let first_segment = &hash[0..1];
+    let second_segment = &hash[1..2];
+    let remaining_segment = &hash[2..];
+
+    Ok(PathBuf::from(cache_path)
+        .join(first_segment)
+        .join(second_segment)
+        .join(remaining_segment))
+}
+
+/// Create a thumbnail for `cover_path` at `thumbnail_path`.
+fn create_thumbnail(cover_path: &Path, thumbnail_path: &Path) -> Result<(), CacheError> {
+    debug!("creating thumbnail for {}", cover_path.to_string_lossy());
+    let folders = thumbnail_path
+        .parent()
+        .ok_or_else(|| CacheError::ThumbnailPathError(thumbnail_path.to_path_buf()))?;
+    fs::create_dir_all(folders)?;
+
+    const THUMBNAIL_SIZE: u32 = 512;
+    let img = image::open(cover_path)?;
+    let thumbnail = img.thumbnail(THUMBNAIL_SIZE, THUMBNAIL_SIZE);
+    thumbnail.save_with_format(thumbnail_path, image::ImageFormat::Jpeg)?;
+    debug!("saved thumbnail to {}", thumbnail_path.to_string_lossy());
+
+    Ok(())
+}
+
+/// Get the thumbnail for a book cover.
+///
+/// If a thumbnail does not yet exist, create it.
+pub fn get_thumbnail(cover_path: &Path, cache_path: &Path) -> Result<File, CacheError> {
+    let path_str = cover_path.to_string_lossy();
+    let mut hasher = Sha256::new();
+    hasher.update(path_str.as_bytes());
+    let hash = hasher.finalize();
+
+    let thumbnail_path = hash_to_path(hash, cache_path)?;
+
+    if !thumbnail_path.exists() {
+        create_thumbnail(cover_path, &thumbnail_path)?;
+    }
+
+    Ok(File::open(thumbnail_path)?)
+}

little-hesinde/src/cli.rs

@@ -7,9 +7,12 @@ use clap::Parser;
 #[command(version, about, long_about = None)]
 pub struct Cli {
     /// Address to listen on
-    #[arg(short, long, default_value = "[::1]:3000")]
+    #[arg(short, long, env, default_value = "[::1]:3000")]
     pub listen_address: String,
+    /// Cache path ($TMP cascades through $XDG_CACHE_HOME, $TMPDIR and /tmp)
+    #[arg(short, long, env, default_value = "$TMP/little-hesinde")]
+    pub cache_path: String,
     /// Calibre library path
-    #[arg(last = true)]
+    #[arg(env, last = true)]
     pub library_path: String,
 }

little-hesinde/src/config.rs

@@ -1,12 +1,14 @@
 //! Configuration data.
 
 use std::{
+    env, fs, io,
     net::SocketAddr,
     net::ToSocketAddrs,
     path::{Path, PathBuf},
 };
 
 use thiserror::Error;
+use tracing::info;
 
 use crate::cli::Cli;
 
@@ -22,6 +24,9 @@ pub enum ConfigError {
     /// Error converting a string to a listening address.
     #[error("failed to convert into listening address")]
     ListeningAddressError(String),
+    /// Error accessing the configured cache path.
+    #[error("failed to access cache path")]
+    CachePathError(#[from] io::Error),
 }
 
 /// Application configuration.
@@ -33,6 +38,8 @@ pub struct Config {
     pub metadata_path: PathBuf,
     /// Address to listen on.
     pub listen_address: SocketAddr,
+    /// Path to data like thumbnails.
+    pub cache_path: PathBuf,
 }
 
 impl Config {
@@ -69,10 +76,21 @@ impl Config {
                 args.listen_address.clone(),
             ))?;
 
+        let cache_path = if args.cache_path.starts_with("$TMP") {
+            let cache_base = env::var("XDG_CACHE_HOME")
+                .unwrap_or_else(|_| env::var("TMPDIR").unwrap_or("/tmp/".to_string()));
+            PathBuf::from(&cache_base).join("little-hesinde")
+        } else {
+            PathBuf::from(&args.cache_path)
+        };
+        fs::create_dir_all(&cache_path)?;
+        info!("Using {} for cache", cache_path.to_string_lossy());
+
         Ok(Self {
             library_path,
             metadata_path,
             listen_address,
+            cache_path,
         })
     }
 }

little-hesinde/src/handlers/cover.rs

@@ -1,24 +1,74 @@
 //! Handle requests for cover images.
 
-use std::sync::Arc;
+use std::{fs::File, path::Path as FilePath, sync::Arc};
 
-use crate::{app_state::AppState, handlers::error::HandlerError};
+use crate::{
+    app_state::AppState,
+    cache::{self, CacheError},
+    config::Config,
+    handlers::error::HandlerError,
+};
+use calibre_db::calibre::Calibre;
 use poem::{
     error::NotFoundError,
     handler,
     web::{headers::ContentType, Data, Path},
     Response,
 };
-use tokio::fs::File;
+use thiserror::Error;
+use tokio::fs::File as AsyncFile;
+
+/// Errors from fetching cover images.
+#[derive(Error, Debug)]
+pub enum CoverError {
+    /// Error fetching a cover thumbnail.
+    #[error("failed to access thumbnail")]
+    ThumbnailError(#[from] CacheError),
+    /// Error fetching a full cover.
+    #[error("failed access cover")]
+    FullCoverError(#[from] std::io::Error),
+}
+
+/// Handle a request for the cover thumbnail of book with id `id`.
+#[handler]
+pub async fn handler_thumbnail(
+    id: Path<u64>,
+    state: Data<&Arc<AppState>>,
+) -> Result<Response, poem::Error> {
+    cover(
+        &state.calibre,
+        &state.config,
+        *id,
+        |cover_path, cache_path| Ok(cache::get_thumbnail(cover_path, cache_path)?),
+    )
+    .await
+}
 
 /// Handle a request for the cover image of book with id `id`.
 #[handler]
-pub async fn handler(id: Path<u64>, state: Data<&Arc<AppState>>) -> Result<Response, poem::Error> {
+pub async fn handler_full(
-    let book = state
+    id: Path<u64>,
-        .calibre
+    state: Data<&Arc<AppState>>,
-        .scalar_book(*id)
+) -> Result<Response, poem::Error> {
-        .map_err(HandlerError::DataError)?;
+    cover(&state.calibre, &state.config, *id, |cover_path, _| {
-    let cover_path = state.config.library_path.join(book.path).join("cover.jpg");
+        Ok(File::open(cover_path)?)
-    let mut cover = File::open(cover_path).await.map_err(|_| NotFoundError)?;
+    })
+    .await
+}
+
+async fn cover<F>(
+    calibre: &Calibre,
+    config: &Config,
+    id: u64,
+    f: F,
+) -> Result<Response, poem::Error>
+where
+    F: Fn(&FilePath, &FilePath) -> Result<File, CoverError>,
+{
+    let book = calibre.scalar_book(id).map_err(HandlerError::DataError)?;
+    let cover_path = config.library_path.join(book.path).join("cover.jpg");
+
+    let cover = f(&cover_path, &config.cache_path).map_err(|_| NotFoundError)?;
+    let cover = AsyncFile::from_std(cover);
     crate::handlers::download::handler("cover.jpg", cover, &ContentType::jpeg().to_string()).await
 }

little-hesinde/src/lib.rs

@@ -16,6 +16,7 @@ use tokio::signal;
 use tracing::info;
 
 pub mod app_state;
+pub mod cache;
 pub mod cli;
 pub mod config;
 /// Data structs and their functions.
@@ -76,7 +77,7 @@ pub mod opds {
 pub mod templates;
 
 pub const APP_NAME: &str = "little-hesinde";
-pub const VERSION: &str = "0.2.3";
+pub const VERSION: &str = "0.3.1";
 
 /// Internal marker data in lieu of a proper `Accept` header.
 #[derive(Debug, Clone, Copy)]
@@ -116,7 +117,11 @@ pub async fn run(config: Config) -> Result<(), std::io::Error> {
             "/authors/:cursor/:sort_order",
             get(handlers::authors::handler),
         )
-        .at("/cover/:id", get(handlers::cover::handler))
+        .at("/cover/:id", get(handlers::cover::handler_full))
+        .at(
+            "/cover/:id/thumbnail",
+            get(handlers::cover::handler_thumbnail),
+        )
         .at("/book/:id/:format", get(handlers::books::handler_download))
         .at("/archive", get(handlers::source_archive::handler))
         .at("/search", get(handlers::search::handler))
@@ -142,7 +147,7 @@ pub async fn run(config: Config) -> Result<(), std::io::Error> {
         .with(Tracing);
 
     let server = Server::new(TcpListener::bind(config.listen_address))
-        .name("cops-web")
+        .name("little-hesinde")
         .run(app);
 
     tokio::select! {

little-hesinde/templates/base.html

@@ -4,6 +4,7 @@
     <meta charset="utf-8">
     <meta name="viewport" content="width=device-width, initial-scale=1">
     <meta name="color-scheme" content="light dark" />
+    <link rel="icon" href="/static/favicon.ico" />
     <link rel="stylesheet" href="/static/pico.min.css" />
     <link rel="stylesheet" href="/static/style.css" />
     <title>Little Hesinde</title>

little-hesinde/templates/book_card.html

@@ -14,7 +14,7 @@
       {% endif %}
     </hgroup>
   </header>
-  <img class="cover" src="/cover/{{ book.data.id }}" alt="book cover">
+  <img class="cover" src="/cover/{{ book.data.id }}/thumbnail" alt="book cover">
   <footer>
     <form>
       <fieldset role="group">