fix: torrent redundant directory (#649)

internal/protocol/http/fetcher.go

@@ -99,7 +99,7 @@ func (f *Fetcher) Resolve(req *base.Request) error {
 	}
 
 	if base.HttpCodePartialContent == httpResp.StatusCode || (base.HttpCodeOK == httpResp.StatusCode && httpResp.Header.Get(base.HttpHeaderAcceptRanges) == base.HttpHeaderBytes && strings.HasPrefix(httpResp.Header.Get(base.HttpHeaderContentRange), base.HttpHeaderBytes)) {
-		// 1.返回206响应码表示支持断点下载 2.不返回206但是Accept-Ranges首部并且等于bytes也表示支持断点下载
+		// response 206 status code, support breakpoint continuation
 		res.Range = true
 		// 解析资源大小: bytes 0-1000/1001 => 1001
 		contentTotal := path.Base(httpResp.Header.Get(base.HttpHeaderContentRange))
@@ -111,7 +111,8 @@ func (f *Fetcher) Resolve(req *base.Request) error {
 			res.Size = parse
 		}
 	} else if base.HttpCodeOK == httpResp.StatusCode {
-		// 返回200响应码，不支持断点下载，通过Content-Length头获取文件大小，获取不到的话可能是chunked编码
+		// response 200 status code, not support breakpoint continuation, get file size by Content-Length header
+		// if not found, maybe chunked encoding
 		contentLength := httpResp.Header.Get(base.HttpHeaderContentLength)
 		if contentLength != "" {
 			parse, err := strconv.ParseInt(contentLength, 10, 64)
@@ -481,6 +482,25 @@ func (fm *FetcherManager) Build() fetcher.Fetcher {
 	return &Fetcher{}
 }
 
+func (fm *FetcherManager) ParseName(u string) string {
+	var name string
+	url, err := url.Parse(u)
+	if err != nil {
+		return ""
+	}
+	// Get filePath by URL
+	name = path.Base(url.Path)
+	// If file name is empty, use host name
+	if name == "" || name == "/" || name == "." {
+		name = url.Hostname()
+	}
+	return name
+}
+
+func (fm *FetcherManager) AutoRename() bool {
+	return true
+}
+
 func (fm *FetcherManager) DefaultConfig() any {
 	return &config{
 		UserAgent:   "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Safari/537.36",

internal/protocol/http/fetcher_test.go

@@ -192,6 +192,54 @@ func TestFetcher_ConfigUseServerCtime(t *testing.T) {
 	}
 }
 
+func TestFetcherManager_ParseName(t *testing.T) {
+	type args struct {
+		u string
+	}
+	tests := []struct {
+		name string
+		args args
+		want string
+	}{
+		{
+			name: "broken url",
+			args: args{
+				u: "https://!@#%github.com",
+			},
+			want: "",
+		},
+		{
+			name: "file path",
+			args: args{
+				u: "https://github.com/index.html",
+			},
+			want: "index.html",
+		},
+		{
+			name: "file path with query and hash",
+			args: args{
+				u: "https://github.com/a/b/index.html/#list?name=1",
+			},
+			want: "index.html",
+		},
+		{
+			name: "no file path",
+			args: args{
+				u: "https://github.com",
+			},
+			want: "github.com",
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			fm := &FetcherManager{}
+			if got := fm.ParseName(tt.args.u); got != tt.want {
+				t.Errorf("ParseName() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
 func downloadReady(listener net.Listener, connections int, t *testing.T) fetcher.Fetcher {
 	return doDownloadReady(buildFetcher(), listener, connections, t)
 }
@@ -359,11 +407,11 @@ func downloadWithProxy(httpListener net.Listener, proxyListener net.Listener, t
 }
 
 func buildFetcher() *Fetcher {
-	fb := new(FetcherManager)
-	fetcher := fb.Build()
+	fm := new(FetcherManager)
+	fetcher := fm.Build()
 	newController := controller.NewController()
 	newController.GetConfig = func(v any) {
-		json.Unmarshal([]byte(test.ToJson(fb.DefaultConfig())), v)
+		json.Unmarshal([]byte(test.ToJson(fm.DefaultConfig())), v)
 	}
 	fetcher.Setup(newController)
 	return fetcher.(*Fetcher)