diff --git a/src-tauri/src/error.rs b/src-tauri/src/error.rs
index 8d35297..4571a9f 100644
--- a/src-tauri/src/error.rs
+++ b/src-tauri/src/error.rs
@@ -2,7 +2,7 @@ use std::num::ParseIntError;
 use futures::future::Aborted;
 use thiserror::Error;
 // use anyhow::Result;
-use serde::{Deserialize, Serialize, Serializer};
+use serde::{Serialize, Serializer};
 
 #[derive(Error, Debug)]
 pub enum Error {
@@ -21,6 +21,8 @@ pub enum Error {
     #[error(transparent)]
     IO(#[from] std::io::Error),
     #[error(transparent)]
+    SendError(#[from] tokio::sync::mpsc::error::SendError<u64>),
+    #[error(transparent)]
     Other(#[from] anyhow::Error), // source and Display delegate to anyhow::Error
 }
 
@@ -64,10 +66,11 @@ impl Serialize for Error {
             Error::Other(other) => serializer.serialize_str(&other.to_string()),
             Error::ReqIO(e) => serializer.serialize_str(&e.to_string()),
             Error::YamlIO(e) => serializer.serialize_str(&e.to_string()),
-            Error::Err(e) => serializer.serialize_str(&e.to_string()),
+            Error::Err(e) => serializer.serialize_str(e),
             Error::Aborted(e) => serializer.serialize_str(&e.to_string()),
             Error::JsonIO(e) => serializer.serialize_str(&e.to_string()),
             Error::ParseIntError(e) => serializer.serialize_str(&e.to_string()),
+            Error::SendError(e) => serializer.serialize_str(&e.to_string())
         }
     }
 }
diff --git a/src-tauri/src/lib.rs b/src-tauri/src/lib.rs
index a26f2f8..c55adbe 100644
--- a/src-tauri/src/lib.rs
+++ b/src-tauri/src/lib.rs
@@ -1,20 +1,20 @@
 use std::path::PathBuf;
-use biliup::{Config, User};
-use anyhow::Context;
+
+
 use biliup::client::{Client, LoginInfo};
 use std::fmt::Write;
 use std::pin::Pin;
 use std::task::Poll;
-use futures::{FutureExt, Stream};
-use std::future::Future;
-use std::rc::Rc;
+use futures::{Stream};
+
+
 use reqwest::Body;
 use bytes::{Buf, Bytes};
-use tauri::{App, Window};
+
 use tokio::sync::mpsc::UnboundedSender;
-use tokio::sync::mpsc::Sender;
+
 use std::sync::{Arc, RwLock};
-use tokio::sync::Mutex;
+
 
 pub mod error;
 
@@ -99,10 +99,10 @@ impl Progressbar {
         if n == 0 {
             Ok(None)
         } else if n < pc {
-            pb.send(n as u64);
+            pb.send(n as u64)?;
             Ok(Some(content_bytes.copy_to_bytes(n)))
         } else {
-            pb.send(pc as u64);
+            pb.send(pc as u64)?;
             Ok(Some(content_bytes.copy_to_bytes(pc)))
         }
     }
diff --git a/src-tauri/src/main.rs b/src-tauri/src/main.rs
index 26cf56e..4a2e1d3 100644
--- a/src-tauri/src/main.rs
+++ b/src-tauri/src/main.rs
@@ -4,21 +4,20 @@ windows_subsystem = "windows"
 )]
 
 use std::borrow::Cow;
-use std::cell::Cell;
+
 use std::path::PathBuf;
 use std::str::FromStr;
-use std::sync::Arc;
-use std::sync::atomic::{AtomicBool, Ordering};
-use std::task::Poll;
-use std::time::Instant;
-use anyhow::{anyhow, bail, Context};
+
+
+
+
+use anyhow::{Context};
 use biliup::{Account, Config, line, User, VideoFile};
-use biliup::client::{Client, LoginInfo};
+use biliup::client::{Client};
 use biliup::video::{BiliBili, Studio, Video};
-use bytes::Buf;
 use futures::future::abortable;
-use futures::stream::Abortable;
-use tauri::{Manager, State, Window};
+
+use tauri::Window;
 use app::{config_file, cookie_file, Credential, encode_hex};
 use app::error;
 use app::error::Result;
@@ -135,7 +134,7 @@ async fn upload(mut video: Video, window: Window, credential: tauri::State<'_, C
         })
     });
     let (a_video, abort_handle) = abortable(f_video);
-    let id = window.once(encode_hex(filename.encode_utf16().collect::<Vec<u16>>().as_slice()), move |event| {
+    let _id = window.once(encode_hex(filename.encode_utf16().collect::<Vec<u16>>().as_slice()), move |event| {
         abort_handle.abort();
         println!("got window event-name with payload {:?}", event.payload());
         // is_remove.store(false, Ordering::Relaxed);
@@ -198,7 +197,7 @@ async fn get_myinfo(credential: tauri::State<'_, Credential>) -> Result<serde_js
 
 #[tauri::command]
 fn load_account() -> Result<User> {
-    Ok(load()?.user.ok_or(error::Error::Err("账号信息不存在".into()))?)
+    load()?.user.ok_or(error::Error::Err("账号信息不存在".into()))
 }
 
 #[tauri::command]
@@ -218,7 +217,7 @@ fn load() -> Result<Config> {
 #[tauri::command]
 async fn cover_up(input: Cow<'_, [u8]>, credential: tauri::State<'_, Credential>) -> Result<String> {
     let (login_info, client) = &*credential.get_credential().await?;
-    let bili = BiliBili::new(&login_info, &client);
+    let bili = BiliBili::new(login_info, client);
     let url = bili.cover_up(&input).await?;
     Ok(url)
 }
@@ -230,7 +229,7 @@ fn is_vid(input: &str) -> bool {
 
 #[tauri::command]
 async fn show_video(input: &str, credential: tauri::State<'_, Credential>) -> Result<Studio> {
-    let (login_info, client) = &*credential.get_credential().await?;;
+    let (login_info, client) = &*credential.get_credential().await?;
     let bili = BiliBili::new(login_info, client);
     let mut data = bili.video_data(biliup::video::Vid::from_str(input)?).await?;
     let mut studio: Studio = serde_json::from_value(data["archive"].take())?;