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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,108 @@ | ||
| package swupdater | ||
|
|
||
| import ( | ||
| "encoding/json" | ||
| "errors" | ||
| "fmt" | ||
| "io" | ||
| "net/http" | ||
| "time" | ||
|
|
||
| "github.com/gorilla/websocket" | ||
| ) | ||
|
|
||
| type SWUpdater struct { | ||
| hostName string | ||
| port int | ||
| path string | ||
| urlUpload string | ||
| urlStatus string | ||
| done chan error | ||
| } | ||
|
|
||
| func NewSWUpdater(hostName, path string, port int) *SWUpdater { | ||
| return &SWUpdater{ | ||
| hostName: hostName, | ||
| port: port, | ||
| path: path, | ||
| urlUpload: fmt.Sprintf("http://%s:%d%s/upload", hostName, port, path), | ||
| urlStatus: fmt.Sprintf("ws://%s:%d%s/ws", hostName, port, path), | ||
| done: make(chan error), | ||
| } | ||
| } | ||
|
|
||
| func (s *SWUpdater) upload(image io.Reader, timeout time.Duration) error { | ||
| req, err := http.NewRequest("POST", s.urlUpload, image) | ||
| if err != nil { | ||
| return fmt.Errorf("cannot create request: %w", err) | ||
| } | ||
|
|
||
| client := &http.Client{Timeout: timeout} | ||
| resp, err := client.Do(req) | ||
| if err != nil { | ||
| return fmt.Errorf("cannot upload software image: %w", err) | ||
| } | ||
| defer resp.Body.Close() | ||
|
|
||
| if resp.StatusCode != http.StatusOK { | ||
| return fmt.Errorf("cannot upload software image: status code %d", resp.StatusCode) | ||
| } | ||
|
|
||
| return nil | ||
| } | ||
|
|
||
| func (s *SWUpdater) waitForFinished() { | ||
| c, _, err := websocket.DefaultDialer.Dial(s.urlStatus, nil) | ||
| if err != nil { | ||
| s.done <- fmt.Errorf("cannot connect to websocket: %w", err) | ||
| return | ||
| } | ||
| defer c.Close() | ||
|
|
||
| for { | ||
| _, message, err := c.ReadMessage() | ||
| if err != nil { | ||
| s.done <- fmt.Errorf("cannot read message from websocket: %w", err) | ||
| return | ||
| } | ||
|
|
||
| data := make(map[string]string) | ||
| err = json.Unmarshal(message, &data) | ||
| if err != nil { | ||
| continue | ||
| } | ||
|
|
||
| if data["type"] != "message" { | ||
| continue | ||
| } | ||
|
|
||
| if data["text"] == "SWUPDATE successful" { | ||
| s.done <- nil | ||
| return | ||
| } | ||
| if data["text"] == "Installation failed" { | ||
| s.done <- errors.New("installation failed") | ||
| return | ||
| } | ||
| } | ||
| } | ||
|
|
||
| func (s *SWUpdater) Update(image io.Reader, timeout time.Duration) error { | ||
| go s.waitForFinished() | ||
| go func() { | ||
| err := s.upload(image, timeout) | ||
| if err != nil { | ||
| s.done <- err | ||
| } | ||
| }() | ||
|
|
||
| select { | ||
| case err := <-s.done: | ||
| if err != nil { | ||
| return err | ||
| } | ||
| return nil | ||
| case <-time.After(timeout): | ||
| return errors.New("timeout") | ||
| } | ||
| } |