Make CancelSafeProcessor impl more concise, format code

src/main.rs

@@ -9,11 +9,18 @@ use awc::Client;
 use dashmap::{mapref::entry::Entry, DashMap};
 use futures_core::stream::Stream;
 use once_cell::sync::{Lazy, OnceCell};
-use std::{collections::HashSet, future::{Future, ready}, path::PathBuf, time::SystemTime, task::{Context, Poll}, pin::Pin};
+use std::{
+    collections::HashSet,
+    future::{ready, Future},
+    path::PathBuf,
+    pin::Pin,
+    task::{Context, Poll},
+    time::SystemTime,
+};
 use structopt::StructOpt;
 use tokio::{
     io::{AsyncReadExt, AsyncWriteExt},
-    sync::oneshot::{Sender, Receiver},
+    sync::oneshot::{Receiver, Sender},
 };
 use tracing::{debug, error, info, instrument, Span};
 use tracing_subscriber::EnvFilter;
@@ -97,7 +104,11 @@ where
             }
         };
 
-        CancelSafeProcessor { path, receiver, fut }
+        CancelSafeProcessor {
+            path,
+            receiver,
+            fut,
+        }
     }
 }
 
@@ -109,25 +120,21 @@ where
 
     fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
         if let Some(ref mut rx) = self.receiver {
-            Pin::new(rx).poll(cx).map(|res| res.map_err(|_| UploadError::Canceled))
+            Pin::new(rx)
+                .poll(cx)
+                .map(|res| res.map_err(|_| UploadError::Canceled))
         } else {
-            match Pin::new(&mut self.fut).poll(cx) {
-                Poll::Pending => Poll::Pending,
-                Poll::Ready(res) => {
+            Pin::new(&mut self.fut).poll(cx).map(|res| {
                 let opt = PROCESS_MAP.remove(&self.path);
-                    match res {
-                        Err(e) => Poll::Ready(Err(e)),
-                        Ok(tup) => {
+                res.map(|tup| {
                     if let Some((_, vec)) = opt {
                         for sender in vec {
                             let _ = sender.send(tup.clone());
                         }
                     }
-                            Poll::Ready(Ok(tup))
-                        }
-                    }
-                }
-            }
+                    tup
+                })
+            })
         }
     }
 }
@@ -533,8 +540,8 @@ async fn process(
             Ok((details, bytes)) as Result<(Details, web::Bytes), UploadError>
         };
 
-        let (details, bytes) = CancelSafeProcessor::new(thumbnail_path.clone(), Box::pin(process_fut)).await?;
-
+        let (details, bytes) =
+            CancelSafeProcessor::new(thumbnail_path.clone(), Box::pin(process_fut)).await?;
 
         return Ok(srv_response(
             HttpResponse::Ok(),