refactor: package

pkg/base/constants.go

@@ -0,0 +1,29 @@
+package base
+
+import "errors"
+
+type Status int
+
+const (
+	DownloadStatusReady Status = iota
+	DownloadStatusStart
+	DownloadStatusPause
+	DownloadStatusError
+	DownloadStatusDone
+)
+
+const (
+	HttpCodeOK             = 200
+	HttpCodePartialContent = 206
+
+	HttpHeaderRange              = "Range"
+	HttpHeaderContentLength      = "Content-Length"
+	HttpHeaderContentRange       = "Content-Range"
+	HttpHeaderContentDisposition = "Content-Disposition"
+
+	HttpHeaderRangeFormat = "bytes=%d-%d"
+)
+
+var (
+	DeleteErr = errors.New("delete")
+)

pkg/base/model.go

@@ -0,0 +1,36 @@
+package base
+
+// 下载请求
+type Request struct {
+	// 下载链接
+	URL string
+	// 附加信息
+	Extra interface{}
+}
+
+// 资源信息
+type Resource struct {
+	Req *Request
+	// 资源总大小
+	TotalSize int64
+	// 是否支持断点下载
+	Range bool
+	// 资源所包含的文件列表
+	Files []*FileInfo
+}
+
+type FileInfo struct {
+	Name string
+	Path string
+	Size int64
+}
+
+// 下载选项
+type Options struct {
+	// 保存文件名
+	Name string
+	// 保存目录
+	Path string
+	// 并发连接数
+	Connections int
+}