|
| 1 | +package Updater |
| 2 | + |
| 3 | +import ( |
| 4 | + "fmt" |
| 5 | + "gopkg.in/yaml.v3" |
| 6 | + "io" |
| 7 | + "log" |
| 8 | + "net/http" |
| 9 | + "os" |
| 10 | +) |
| 11 | + |
| 12 | +/* example yaml |
| 13 | +packages: |
| 14 | + app: |
| 15 | + version: 1.0.0.16 |
| 16 | + urls: |
| 17 | + - https://eu2.someurl.com/app1.0.0.16_win.zip |
| 18 | +
|
| 19 | + data: |
| 20 | + version: 1.0.0.3 |
| 21 | + urls: |
| 22 | + - https://eu2.someurl.com/data1.0.0.3_win.zip |
| 23 | + - https://usc1.someurl.com/data1.0.0.3_win.zip |
| 24 | +*/ |
| 25 | + |
| 26 | +type UpdateInfo struct { |
| 27 | + Version string `yaml:"version"` |
| 28 | + Urls []string `yaml:"urls"` |
| 29 | +} |
| 30 | + |
| 31 | +func (i *UpdateInfo) WriteYaml(fileName string) { |
| 32 | + // marshal the struct to yaml and save as file |
| 33 | + yamlFile, err := yaml.Marshal(i) |
| 34 | + if err != nil { |
| 35 | + log.Printf("error: %v", err) |
| 36 | + } |
| 37 | + err = os.WriteFile(fileName, yamlFile, 0644) |
| 38 | + if err != nil { |
| 39 | + log.Printf("error: %v", err) |
| 40 | + } |
| 41 | +} |
| 42 | + |
| 43 | +func (i *UpdateInfo) ReadYaml(data []byte) error { |
| 44 | + // read the yaml file and unmarshal it to the struct |
| 45 | + var err error |
| 46 | + err = yaml.Unmarshal(data, i) |
| 47 | + if err != nil { |
| 48 | + log.Printf("Unmarshal: %v", err) |
| 49 | + } |
| 50 | + return err |
| 51 | +} |
| 52 | + |
| 53 | +type UpdatePackages struct { |
| 54 | + Packages map[string]UpdateInfo `yaml:"packages"` |
| 55 | + //DoNotAskAgain bool `yaml:"doNotAskAgain,omitempty"` |
| 56 | +} |
| 57 | + |
| 58 | +func (u *UpdatePackages) parsePackagesFromYaml(data []byte) error { |
| 59 | + var err error |
| 60 | + err = yaml.Unmarshal(data, u) |
| 61 | + if err != nil { |
| 62 | + log.Printf("Unmarshal: %v", err) |
| 63 | + } |
| 64 | + return err |
| 65 | +} |
| 66 | + |
| 67 | +func (u *UpdatePackages) getYaml(url string) ([]byte, error) { |
| 68 | + resp, err := http.Get(url) |
| 69 | + if err != nil { |
| 70 | + return []byte{}, fmt.Errorf("GET error: %v", err) |
| 71 | + } |
| 72 | + defer resp.Body.Close() |
| 73 | + |
| 74 | + if resp.StatusCode != http.StatusOK { |
| 75 | + return []byte{}, fmt.Errorf("status error: %v", resp.StatusCode) |
| 76 | + } |
| 77 | + |
| 78 | + data, err := io.ReadAll(resp.Body) |
| 79 | + if err != nil { |
| 80 | + return []byte{}, fmt.Errorf("read body: %v", err) |
| 81 | + } |
| 82 | + |
| 83 | + return data, nil |
| 84 | +} |
| 85 | + |
| 86 | +func (u *UpdatePackages) WriteYaml(fileName string) { |
| 87 | + // marshal the struct to yaml and save as file |
| 88 | + yamlFile, err := yaml.Marshal(u) |
| 89 | + if err != nil { |
| 90 | + log.Printf("error: %v", err) |
| 91 | + } |
| 92 | + err = os.WriteFile(fileName, yamlFile, 0644) |
| 93 | + if err != nil { |
| 94 | + log.Printf("error: %v", err) |
| 95 | + } |
| 96 | +} |
| 97 | + |
| 98 | +func (u *UpdatePackages) GetUpdateInfo(url string) error { |
| 99 | + data, err := u.getYaml(url) |
| 100 | + if err != nil { |
| 101 | + return err |
| 102 | + } |
| 103 | + return u.parsePackagesFromYaml(data) |
| 104 | +} |
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