BitTorrent HTTP、UDP tracker impl(50%)

ahbxl · May 17, 2019 · 41ff983 · 41ff983
1 parent 8080350
commit 41ff983
Show file tree

Hide file tree

Showing 16 changed files with 600 additions and 25 deletions.
diff --git a/.gitignore b/.gitignore
@@ -11,4 +11,6 @@
 # Output of the go coverage tool, specifically when used with LiteIDE
 *.out
 
-debug
+debug
+
+.idea/
diff --git a/.vscode/settings.json b/.vscode/settings.json
@@ -1,11 +1,17 @@
 {
-  "go.formatTool": "goimports",
   "go.useLanguageServer": true,
-  "go.alternateTools": {
-    "go-langserver": "gopls"
-  },
   "go.languageServerExperimentalFeatures": {
-    "format": false,
-    "autoComplete": true
+    "diagnostics": true // for diagnostics as you type
+  },
+  "[go]": {
+    "editor.snippetSuggestions": "none",
+    "editor.formatOnSave": true,
+    "editor.codeActionsOnSave": {
+      "source.organizeImports": true
+    }
+  },
+  "gopls": {
+    "usePlaceholders": true, // add parameter placeholders when completing a function
+    "enhancedHover": true // experimental to improve quality of hover (will be on by default soon)
   }
 }
diff --git a/cmd/bt.go b/cmd/bt.go
@@ -0,0 +1,21 @@
+package main
+
+import (
+	"gopeed/down/bt"
+)
+
+func main() {
+	metaInfo, _ := bt.ParseFromFile("e:/Game.of.Thrones.S08E05.720p.WEB.H264-MEMENTO.torrent")
+	// metaInfo, _ := down.ParseFromFile("e:/test.torrent")
+	if len(metaInfo.AnnounceList) > 0 {
+		for _, announceArr := range metaInfo.AnnounceList {
+			if len(announceArr) > 0 {
+				for _, announce := range announceArr {
+					bt.DoTracker(announce, metaInfo)
+				}
+			}
+		}
+	} else {
+		bt.DoTracker(metaInfo.Announce, metaInfo)
+	}
+}
diff --git a/cmd/test.go b/cmd/test.go
@@ -0,0 +1,9 @@
+package main
+
+import "fmt"
+
+func main() {
+	var b = -1
+	var n = uint32(b)
+	fmt.Println(n)
+}
diff --git a/cmd/udpclient.go b/cmd/udpclient.go
@@ -0,0 +1,21 @@
+package main
+
+import (
+	"fmt"
+	"net"
+)
+
+func main() {
+	ip := net.ParseIP("127.0.0.1")
+	srcAddr := &net.UDPAddr{IP: net.IPv4zero, Port: 0}
+	dstAddr := &net.UDPAddr{IP: ip, Port: 9981}
+	conn, err := net.DialUDP("udp", srcAddr, dstAddr)
+	if err != nil {
+		fmt.Println(err)
+	}
+	defer conn.Close()
+	conn.Write([]byte("hello"))
+	conn.Write([]byte("test"))
+	conn.Read([]byte{})
+	fmt.Printf("<%s>\n", conn.RemoteAddr())
+}
diff --git a/cmd/udpserver.go b/cmd/udpserver.go
@@ -0,0 +1,27 @@
+package main
+
+import (
+	"fmt"
+	"net"
+)
+
+func main() {
+	conn, err := net.ListenUDP("udp", &net.UDPAddr{IP: net.ParseIP("127.0.0.1"), Port: 9981})
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+	fmt.Printf("Local: <%s> \n", conn.LocalAddr().String())
+	data := make([]byte, 1024)
+	for {
+		n, remoteAddr, err := conn.ReadFromUDP(data)
+		if err != nil {
+			fmt.Printf("error during read: %s", err)
+		}
+		fmt.Printf("<%s> %s\n", remoteAddr, data[:n])
+		_, err = conn.WriteToUDP([]byte("world"), remoteAddr)
+		if err != nil {
+			fmt.Printf(err.Error())
+		}
+	}
+}
diff --git a/down/bt/bittorrent.go b/down/bt/bittorrent.go
@@ -0,0 +1 @@
+package bt
diff --git a/down/bt/metainfo.go b/down/bt/metainfo.go
@@ -0,0 +1,95 @@
+package bt
+
+import (
+	"crypto/sha1"
+	"encoding/json"
+	"github.com/marksamman/bencode"
+	"os"
+)
+
+type MetaInfo struct {
+	// tracker URL
+	// http://bittorrent.org/beps/bep_0003.html#metainfo-files
+	Announce string `json:"announce"`
+
+	// tracker URL
+	// http://bittorrent.org/beps/bep_0012.html
+	AnnounceList [][]string `json:"announce-list"`
+
+	Comment string `json:"comment"`
+
+	CreatedBy string `json:"created by"`
+
+	CreationDate int64 `json:"creation date"`
+
+	Encoding string `json:"encoding"`
+
+	// http://bittorrent.org/beps/bep_0019.html
+	UrlList []string `json:"url-list"`
+
+	Info     *Info    `json:"info"`
+	InfoHash [20]byte `json:"-"`
+}
+
+type Info struct {
+	Name        string `json:"name"`
+	PieceLength uint64 `json:"piece length"`
+	Pieces      []string
+	Length      uint64 `json:"length"`
+	Files       []File `json:"files"`
+}
+
+type File struct {
+	Length uint64 `json:"length"`
+	Path   string `json:"path"`
+}
+
+func (metaInfo *MetaInfo) GetTotalSize() uint64 {
+	if metaInfo.Info != nil {
+		if len(metaInfo.Info.Files) > 0 {
+			var length uint64
+			for _, f := range metaInfo.Info.Files {
+				length += f.Length
+			}
+			return length
+		} else {
+			return metaInfo.Info.Length
+		}
+	}
+	return 0
+}
+
+func ParseFromFile(path string) (*MetaInfo, error) {
+	file, err := os.Open(path)
+	if err != nil {
+		return nil, err
+	}
+	// http://bittorrent.org/beps/bep_0003.html#bencoding
+	btDecode, err := bencode.Decode(file)
+	if err != nil {
+		return nil, err
+	}
+	bytes, err := json.Marshal(btDecode)
+	if err != nil {
+		return nil, err
+	}
+	var metaInfo MetaInfo
+	json.Unmarshal(bytes, &metaInfo)
+	if metaInfo.Info != nil {
+		// Encode info hash
+		info := btDecode["info"].(map[string]interface{})
+		infoBtEncode := bencode.Encode(info)
+		metaInfo.InfoHash = sha1.Sum(infoBtEncode[:])
+		// Split pieces hash
+		pieces := info["pieces"].(string)
+		if pieces != "" {
+			metaInfo.Info.Pieces = make([]string, len(pieces)/20)
+			// pieces parse
+			for i := range metaInfo.Info.Pieces {
+				begin := i * 20
+				metaInfo.Info.Pieces[i] = pieces[begin : begin+20]
+			}
+		}
+	}
+	return &metaInfo, nil
+}
-Original file line number
+Diff line change
@@ Expand Up / @@ -11,4 +11,6 @@ @@
     # Output of the go coverage tool, specifically when used with LiteIDE
     *.out
-    debug
+    debug
+    .idea/