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package main |
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import ( |
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"encoding/json" |
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"os" |
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"os/user" |
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"path/filepath" |
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) |
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var dataFolder = ".hget/" |
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var stateFileName = "state.json" |
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// State holds information about url Parts |
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type State struct { |
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URL string |
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Parts []Part |
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} |
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// Part represents a chunk of downloaded file |
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type Part struct { |
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Index int64 |
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URL string |
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Path string |
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RangeFrom int64 |
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RangeTo int64 |
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} |
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// Save stores downloaded file into disk |
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func (s *State) Save() error { |
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//make temp folder |
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//only working in unix with env HOME |
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folder := FolderOf(s.URL) |
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Printf("Saving current download data in %s\n", folder) |
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if err := MkdirIfNotExist(folder); err != nil { |
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return err |
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} |
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//move current downloading file to data folder |
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for _, part := range s.Parts { |
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err := os.Rename(part.Path, filepath.Join(folder, filepath.Base(part.Path))) |
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if err != nil { |
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return err |
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} |
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} |
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//save state file |
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j, err := json.Marshal(s) |
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if err != nil { |
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return err |
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} |
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return os.WriteFile(filepath.Join(folder, stateFileName), j, 0644) |
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} |
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// Read loads data about the state of downloaded files |
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func Read(task string) (*State, error) { |
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usr, err := user.Current() |
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FatalCheck(err) |
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homeDir := usr.HomeDir |
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// extract filename from task |
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taskName := TaskFromURL(task) |
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file := filepath.Join(homeDir, dataFolder, taskName, stateFileName) |
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Printf("Getting data from %s\n", file) |
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bytes, err := os.ReadFile(file) |
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if err != nil { |
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return nil, err |
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} |
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s := new(State) |
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err = json.Unmarshal(bytes, s) |
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return s, err |
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} |
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abzcoding /
hget
