remove more unwraps

src/cache/disk_cache.rs

@@ -8,7 +8,7 @@ use std::sync::Arc;
 use async_trait::async_trait;
 use bytes::Bytes;
 use futures::StreamExt;
-use log::{warn, LevelFilter};
+use log::{error, warn, LevelFilter};
 use sqlx::sqlite::SqliteConnectOptions;
 use sqlx::{ConnectOptions, SqlitePool};
 use tokio::fs::remove_file;
@@ -36,7 +36,7 @@ impl DiskCache {
     pub async fn new(disk_max_size: u64, disk_path: PathBuf) -> Arc<Box<dyn Cache>> {
         let (db_tx, db_rx) = channel(128);
         let db_pool = {
-            let db_url = format!("sqlite:{}/metadata.sqlite", disk_path.to_str().unwrap());
+            let db_url = format!("sqlite:{}/metadata.sqlite", disk_path.to_string_lossy());
             let mut options = SqliteConnectOptions::from_str(&db_url)
                 .unwrap()
                 .create_if_missing(true);
@@ -80,7 +80,13 @@ async fn db_listener(
     let mut recv_stream = ReceiverStream::new(db_rx).ready_chunks(128);
     while let Some(messages) = recv_stream.next().await {
         let now = chrono::Utc::now();
-        let mut transaction = db_pool.begin().await.unwrap();
+        let mut transaction = match db_pool.begin().await {
+            Ok(transaction) => transaction,
+            Err(e) => {
+                error!("Failed to start a transaction to DB, cannot update DB. Disk cache may be losing track of files! {}", e);
+                continue;
+            }
+        };
         for message in messages {
             match message {
                 DbMessage::Get(entry) => {
@@ -111,15 +117,42 @@ async fn db_listener(
                 }
             }
         }
-        transaction.commit().await.unwrap();
+
+        if let Err(e) = transaction.commit().await {
+            error!(
+                "Failed to commit transaction to DB. Disk cache may be losing track of files! {}",
+                e
+            );
+        }
 
         if cache.on_disk_size() >= max_on_disk_size {
-            let mut conn = db_pool.acquire().await.unwrap();
-            let items =
+            let mut conn = match db_pool.acquire().await {
+                Ok(conn) => conn,
+                Err(e) => {
+                    error!(
+                        "Failed to get a DB connection and cannot prune disk cache: {}",
+                        e
+                    );
+                    continue;
+                }
+            };
+
+            let items = {
+                let request =
                     sqlx::query!("select id, size from Images order by accessed asc limit 1000")
                         .fetch_all(&mut conn)
-                    .await
-                    .unwrap();
+                        .await;
+                match request {
+                    Ok(items) => items,
+                    Err(e) => {
+                        error!(
+                            "Failed to fetch oldest images and cannot prune disk cache: {}",
+                            e
+                        );
+                        continue;
+                    }
+                }
+            };
 
             let mut size_freed = 0;
             for item in items {

src/cache/fs.rs

@@ -84,14 +84,14 @@ pub async fn write_file<
 
     let mut file = {
         let mut write_lock = WRITING_STATUS.write().await;
-        let parent = path.parent().unwrap();
+        let parent = path.parent().expect("The path to have a parent");
         create_dir_all(parent).await?;
         let file = File::create(path).await?; // we need to make sure the file exists and is truncated.
         write_lock.insert(path.to_path_buf(), rx.clone());
         file
     };
 
-    let metadata_string = serde_json::to_string(&metadata).unwrap();
+    let metadata_string = serde_json::to_string(&metadata).expect("serialization to work");
     let metadata_size = metadata_string.len();
     // need owned variant because async lifetime
     let path_buf = path.to_path_buf();
@@ -151,9 +151,8 @@ pub async fn write_file<
         }
 
         tokio::spawn(db_callback(bytes_written));
-        if accumulate {
+        if let Some(sender) = on_complete {
             tokio::spawn(async move {
-                let sender = on_complete.unwrap();
                 sender
                     .send((
                         cache_key,
@@ -244,7 +243,7 @@ impl Stream for ConcurrentFsStream {
             if let Poll::Ready(Some(WritingStatus::Done(n))) =
                 self.receiver.as_mut().poll_next_unpin(cx)
             {
-                self.bytes_total = Some(NonZeroU32::new(n).unwrap())
+                self.bytes_total = Some(NonZeroU32::new(n).expect("Stored a 0 byte image?"))
             }
 
             // Okay, now we know if we've read enough bytes or not. If the

src/ping.rs

@@ -39,7 +39,9 @@ impl<'a> Request<'a> {
             port: config.port,
             disk_space: config.disk_quota,
             network_speed: config.network_speed,
-            build_version: client_api_version!().parse().unwrap(),
+            build_version: client_api_version!()
+                .parse()
+                .expect("to parse the build version"),
             tls_created_at: Some(state.0.read().tls_config.created_at.clone()),
         }
     }
@@ -53,7 +55,9 @@ impl<'a> From<(&'a str, &CliArgs)> for Request<'a> {
             port: config.port,
             disk_space: config.disk_quota,
             network_speed: config.network_speed,
-            build_version: client_api_version!().parse().unwrap(),
+            build_version: client_api_version!()
+                .parse()
+                .expect("to parse the build version"),
             tls_created_at: None,
         }
     }