feat: 添加单曲信息获取和下载功能

- 新增 aria2 模块，实现下载功能- 新增 single 模块，实现单曲信息获取
- 新增 utils 模块，用于创建请求客户端

.gitignore

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+/target
+/.idea

Cargo.toml

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+[package]
+name = "netease-downloader"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+tokio = { version = "1.47.1", default-features = false, features = ["rt-multi-thread", "macros", "time"] }
+reqwest = { version = "0.12.23", default-features = false, features = ["rustls-tls", "json"] }
+serde = { version = "1.0.219", default-features = false, features = ["std", "derive"] }
+serde_json = { version = "1.0.142", default-features = false, features = ["std"] }
+aria2-ws = "0.5.1"

src/aria2.rs

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+use crate::ErrorString;
+use aria2_ws::{Client, TaskOptions};
+
+pub async fn download(url: String, path: String) -> Result<(), ErrorString> {
+    let client = Client::connect("ws://127.0.0.1:16800/jsonrpc", Some("GenshinMinecraft"))
+        .await
+        .map_err(|e| format!("无法创建 Client: {e}"))?;
+    let options = TaskOptions {
+        out: Some(path),
+        ..Default::default()
+    };
+    client
+        .add_uri(vec![url], Some(options.clone()), None, None)
+        .await
+        .map_err(|e| format!("无法添加任务: {e}"))?;
+
+    Ok(())
+}

src/main.rs

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+mod aria2;
+mod single;
+pub mod utils;
+
+type ErrorString = String;
+
+#[tokio::main]
+async fn main() {
+    let single_songs_info = single::single(448317056).await.unwrap();
+    println!("{:?}", single_songs_info);
+    aria2::download(single_songs_info.download_url, format!("{}.flac", single_songs_info.name)).await.unwrap();
+}

src/single.rs

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+use crate::ErrorString;
+use crate::utils::create_reqwest_client;
+use serde::{Deserialize, Serialize};
+use tokio::task::JoinHandle;
+
+#[derive(Debug)]
+pub struct SingleSongsInfo {
+    pub id: u64,
+    pub name: String,
+    pub artist: String,
+    pub album: String,
+    pub pic_url: String,
+    pub download_url: String,
+}
+
+#[derive(Serialize, Deserialize)]
+struct DetailJson {
+    name: String,
+    ar_name: String,
+    al_name: String,
+    pic: String,
+    url: String,
+}
+
+pub async fn single(id: u64) -> Result<SingleSongsInfo, ErrorString> {
+    let client = create_reqwest_client().await?;
+
+    let info_handle: JoinHandle<Result<DetailJson, ErrorString>> = tokio::spawn(async move {
+        let info_request_url =
+            format!("https://api.kxzjoker.cn/api/163_music?url={id}&level=jymaster&type=json");
+        client
+            .post(info_request_url)
+            .send()
+            .await
+            .map_err(|e| format!("无法获取歌曲信息: {e}"))?
+            .json::<DetailJson>()
+            .await
+            .map_err(|e| format!("无法解析歌曲信息: {e}"))
+    });
+
+    let info_result = info_handle
+        .await
+        .map_err(|e| format!("歌曲信息获取失败: {e}"))??;
+
+    Ok(SingleSongsInfo {
+        id,
+        name: info_result.name,
+        artist: info_result.ar_name,
+        album: info_result.al_name,
+        pic_url: info_result.pic,
+        download_url: info_result.url,
+    })
+}

src/utils.rs

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+use crate::ErrorString;
+use reqwest::Client;
+use std::time::Duration;
+use tokio::sync::OnceCell;
+
+static CLIENT: OnceCell<Client> = OnceCell::const_new();
+pub async fn create_reqwest_client() -> Result<&'static Client, ErrorString> {
+    CLIENT
+        .get_or_try_init(|| async {
+            Client::builder()
+                .timeout(Duration::from_secs(5))
+                .user_agent("Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/139.0.0.0 Safari/537.36")
+                .build()
+        })
+        .await.map_err(|e| format!("无法创建 Client: {e}"))
+}