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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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@@ -20,7 +20,6 @@ linters: | |
| - gocritic | ||
| - gocyclo | ||
| - godot | ||
| - godox | ||
| - gofmt | ||
| - gofumpt | ||
| - goheader | ||
|
|
||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,149 @@ | ||
| package version | ||
|
|
||
| import ( | ||
| "context" | ||
| "encoding/json" | ||
| "errors" | ||
| "fmt" | ||
| "io/ioutil" | ||
| "net/http" | ||
| "os" | ||
| "path/filepath" | ||
| "time" | ||
|
|
||
| "github.com/hbagdi/hit/pkg/cache" | ||
| ) | ||
|
|
||
| const ( | ||
| versionEndpoint = "https://hit-server.yolo42.com/api/v1/latest-version" | ||
| requestTimeout = 3 * time.Second | ||
| ) | ||
|
|
||
| func checkForUpdate() (string, error) { | ||
| ctx, cancel := context.WithTimeout(context.Background(), requestTimeout) | ||
| defer cancel() | ||
| req, err := http.NewRequestWithContext(ctx, http.MethodGet, | ||
| versionEndpoint, nil) | ||
| req.Header.Add("user-agent", "hit/"+Version) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
| res, err := http.DefaultClient.Do(req) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
| defer func() { | ||
| // TODO(hbagdi): handle err | ||
| _ = res.Body.Close() | ||
| }() | ||
| if res.StatusCode != http.StatusOK { | ||
| return "", fmt.Errorf("unexpected status code: %v", res.StatusCode) | ||
| } | ||
| js, err := ioutil.ReadAll(res.Body) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
| return parseVersionFromResponseOrFile(js) | ||
| } | ||
|
|
||
| func parseVersionFromResponseOrFile(js []byte) (string, error) { | ||
| var m map[string]interface{} | ||
| if err := json.Unmarshal(js, &m); err != nil { | ||
| return "", err | ||
| } | ||
| v, ok := m["version"] | ||
| if !ok { | ||
| return "", fmt.Errorf("no 'version' field in the response") | ||
| } | ||
| version, ok := v.(string) | ||
| if !ok { | ||
| return "", fmt.Errorf("expected 'version' field to be a string, "+ | ||
| "but got %T", v) | ||
| } | ||
| return version, nil | ||
| } | ||
|
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| var versionCacheFullPath string | ||
|
|
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| func versionCacheFileName() (string, error) { | ||
| if versionCacheFullPath != "" { | ||
| return versionCacheFullPath, nil | ||
| } | ||
| const versionCacheFilename = "latest_version.json" | ||
| hitCacheDir, err := cache.HitCacheDir() | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
| return filepath.Join(hitCacheDir, versionCacheFilename), nil | ||
| } | ||
|
|
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| var errCacheMiss = fmt.Errorf("cache miss") | ||
|
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| func loadVersionFromCache() (string, error) { | ||
| filename, err := versionCacheFileName() | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
| js, err := ioutil.ReadFile(filename) | ||
| if err != nil { | ||
| if errors.Is(err, os.ErrNotExist) { | ||
| return "", errCacheMiss | ||
| } | ||
| return "", err | ||
| } | ||
| cacheInfo, err := os.Stat(filename) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
| lastUpdated := cacheInfo.ModTime() | ||
| cutoff := time.Now().Add(-24 * time.Hour) | ||
| if lastUpdated.Before(cutoff) { | ||
| return "", errCacheMiss | ||
| } | ||
| return parseVersionFromResponseOrFile(js) | ||
| } | ||
|
|
||
| func refreshVersionCache() (string, error) { | ||
| version, err := checkForUpdate() | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
| // TODO(hbagdi): log this error | ||
| _ = updateCache(version) | ||
|
|
||
| return version, nil | ||
| } | ||
|
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||
| func updateCache(version string) error { | ||
| const fileMode = 0o0600 | ||
| js, err := json.Marshal(map[string]string{ | ||
| "version": version, | ||
| }) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| filename, err := versionCacheFileName() | ||
| if err != nil { | ||
| return err | ||
| } | ||
| err = ioutil.WriteFile(filename, js, fileMode) | ||
| if err != nil { | ||
| return fmt.Errorf("update version cache: %w", err) | ||
| } | ||
| return nil | ||
| } | ||
|
|
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| func LoadLatestVersion() (string, error) { | ||
| version, err := loadVersionFromCache() | ||
| if err != nil { | ||
| if err == errCacheMiss { | ||
| updatedVersion, err := refreshVersionCache() | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
| return updatedVersion, nil | ||
| } | ||
| return "", err | ||
| } | ||
| return version, nil | ||
| } |