DHTServer

Struct DHTServer 

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pub struct DHTServer { /* private fields */ }

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impl DHTServer

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pub async fn new(options: DHTOptions) -> Result<Self>

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pub fn local_addr(&self) -> Result<SocketAddr>

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pub fn on_metadata_fetch<F, Fut>(&self, callback: F)
where F: Fn(String) -> Fut + Send + Sync + 'static, Fut: Future<Output = bool> + Send + 'static,

设置元数据获取前的检查回调

此回调在发现新的 info_hash 后,但在实际连接对等端获取元数据之前执行。 你可以在这里进行去重检查(如查询数据库),返回 true 表示继续获取,false 表示跳过。

§注意事项
  • 回调是在 MetadataScheduler 的 Worker 线程中异步执行的(通过 .await)。
  • 支持耗时操作(如数据库查询),但请注意 Worker 数量限制(默认 500)。
  • 如果回调执行过慢,可能会导致任务队列堆积。
§示例
server.on_metadata_fetch(|hash| async move {
    // 检查数据库是否存在
    // let exists = db.has(hash).await;
    // !exists
    true
});
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pub fn on_torrent<F>(&self, callback: F)
where F: Fn(TorrentInfo) + Send + Sync + 'static,

设置成功获取到种子信息的回调

当成功从对等端下载并解析出种子元数据(Metadata)后调用。

§注意事项
  • 此回调是在 Worker 线程中同步执行的。
  • 如果包含耗时操作(如写入大量数据或复杂计算),必须在回调内部手动使用 tokio::spawn
  • 否则会阻塞当前的元数据获取 Worker,降低系统吞吐量。
§示例
server.on_torrent(|info| {
    // 简单操作可以直接做
    println!("Got torrent: {}", info.name);
     
    // 耗时操作建议 spawn
    tokio::spawn(async move {
        save_to_db(info).await;
    });
});
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pub fn set_filter<F>(&self, filter: F)
where F: Fn(&str) -> bool + Send + Sync + 'static,

设置 Hash 过滤器

在处理 announce_peer 消息时,用于快速判断是否应该处理该 Hash。 这通常用于布隆过滤器之前的黑名单或白名单机制。

§注意事项
  • 此回调是在 UDP 处理线程中同步执行的。
  • 绝对禁止执行任何耗时操作(如 IO、数据库查询、锁等待)。
  • 任何延迟都会直接阻塞网络包的接收,导致丢包。
  • 应仅进行纯内存的快速判断。
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pub fn get_node_pool_size(&self) -> usize

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pub async fn start(&self) -> Result<()>

Trait Implementations§

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impl Clone for DHTServer

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fn clone(&self) -> DHTServer

Returns a duplicate of the value. Read more
1.0.0 · Source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more

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🔬This is a nightly-only experimental API. (clone_to_uninit)
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