(feat:background) Fix Rust-based file download & Create the 'bg' directory on app setup

src-tauri/src/http.rs

@@ -1,4 +1,3 @@
-use core::error::Error;
 use std::fs::File;
 use std::io::Write;
 use std::path::Path;
@@ -9,17 +8,20 @@ use std::path::Path;
 /// url: The URL to download from.
 /// to_file: The file to save to.
 #[tauri::command]
-pub async fn download_file(url: String, to_file: String) -> Result<String, Box<dyn Error>> {
-    let mut response = reqwest::get(&url).await?;
+pub async fn download_file(url: String, to_file: String) -> Result<String, String> {
+    let mut response = reqwest::get(&url).await
+        .expect("Failed to send request");
     let mut dest = {
         let fname = Path::new(&to_file);
         match File::create(&fname) {
             Ok(f) => f,
-            Err(e) => return Err(Box::new(e)),
+            Err(_) => return Err("Failed to create file".to_string()),
         }
     };
-    while let Some(chunk) = response.chunk().await? {
-        dest.write_all(&chunk).await?;
+    while let Some(chunk) = response.chunk().await
+        .expect("Unable to read chunk") {
+        dest.write_all(&chunk)
+            .expect("Failed to write chunk to file")
     }
     Ok("Downloaded".to_string())
 }