fix: 调整命令行参数解析

src/main.rs

@@ -11,11 +11,7 @@ async fn main() {
     let fetcher = Fetcher::new();
 
     let args: Vec<String> = std::env::args().collect();
-    let operation = &args[1].as_str();
-
-    match operation {
-        &"get" => {
-            let id = args[2].parse::<u32>();
+    let id = args[1].parse::<u32>();
 
     match id {
         Ok(id) => {
@@ -39,9 +35,6 @@ async fn main() {
             eprintln!("Get operation needs a usize param.")
         }
     }
-        }
-        _ => {}
-    }
 }
 
 fn write_file(file_name: &String, file_content: &String) -> std::io::Result<()> {