tracker: add http tracker support

examples/decode-torrent.rs

@@ -7,6 +7,8 @@ use std::str;
 
 use magnolia::bencode::*;
 use magnolia::metainfo::Metainfo;
+use magnolia::torrent::Torrent;
+use magnolia::tracker::http;
 
 fn load_file(path: &str) -> io::Result<()> {
     let mut buf = Vec::new();
@@ -14,8 +16,18 @@ fn load_file(path: &str) -> io::Result<()> {
     f.read_to_end(&mut buf)?;
 
     let obj = decode(&buf).unwrap();
-    let meta = Metainfo::from_bencode(obj);
-    println!("{:#?}", meta);
+    let meta = Metainfo::from_bencode(obj).unwrap();
+
+    let t = Torrent {
+        metainfo: meta,
+        uploaded: 0,
+        downloaded: 0,
+        left: 0,
+    };
+
+    let resp = http::get_peers([1u8; 20], 55555, &t).unwrap();
+
+    print!("{:?}", resp);
 
     Ok(())
 }