105 lines
2.8 KiB
Go
105 lines
2.8 KiB
Go
package update
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import (
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"encoding/json"
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"fmt"
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"io/ioutil"
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"strings"
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"time"
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)
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const versionCheckPeriod = 8 * 60 * 60
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// VersionInfo - VersionInfo
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type VersionInfo struct {
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NewVersion string // New version string
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Announcement string // Announcement text
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AnnouncementURL string // Announcement URL
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SelfUpdateMinVersion string // Min version starting with which we can auto-update
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CanAutoUpdate bool // If true - we can auto-update
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}
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// GetVersionResponse - downloads version.json (if needed) and deserializes it
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func (u *Updater) GetVersionResponse(forceRecheck bool) (VersionInfo, error) {
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if !forceRecheck &&
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u.versionCheckLastTime.Unix()+versionCheckPeriod > time.Now().Unix() {
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return u.parseVersionResponse(u.versionJSON)
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}
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resp, err := u.Client.Get(u.VersionURL)
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if resp != nil && resp.Body != nil {
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defer resp.Body.Close()
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}
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if err != nil {
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return VersionInfo{}, fmt.Errorf("updater: HTTP GET %s: %s", u.VersionURL, err)
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}
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body, err := ioutil.ReadAll(resp.Body)
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if err != nil {
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return VersionInfo{}, fmt.Errorf("updater: HTTP GET %s: %s", u.VersionURL, err)
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}
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u.versionJSON = body
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u.versionCheckLastTime = time.Now()
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return u.parseVersionResponse(body)
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}
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func (u *Updater) parseVersionResponse(data []byte) (VersionInfo, error) {
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info := VersionInfo{}
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versionJSON := make(map[string]interface{})
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err := json.Unmarshal(data, &versionJSON)
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if err != nil {
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return info, fmt.Errorf("version.json: %s", err)
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}
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var ok1, ok2, ok3, ok4 bool
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info.NewVersion, ok1 = versionJSON["version"].(string)
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info.Announcement, ok2 = versionJSON["announcement"].(string)
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info.AnnouncementURL, ok3 = versionJSON["announcement_url"].(string)
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info.SelfUpdateMinVersion, ok4 = versionJSON["selfupdate_min_version"].(string)
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if !ok1 || !ok2 || !ok3 || !ok4 {
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return info, fmt.Errorf("version.json: invalid data")
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}
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packageURL, ok := u.getDownloadURL(versionJSON)
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if ok &&
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info.NewVersion != u.VersionString &&
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strings.TrimPrefix(u.VersionString, "v") >= strings.TrimPrefix(info.SelfUpdateMinVersion, "v") {
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info.CanAutoUpdate = true
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}
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u.NewVersion = info.NewVersion
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u.PackageURL = packageURL
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return info, nil
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}
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// Get download URL for the current GOOS/GOARCH/ARMVersion
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func (u *Updater) getDownloadURL(json map[string]interface{}) (string, bool) {
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var key string
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if u.Arch == "arm" && u.ARMVersion != "" {
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// the key is:
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// download_linux_armv5 for ARMv5
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// download_linux_armv6 for ARMv6
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// download_linux_armv7 for ARMv7
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key = fmt.Sprintf("download_%s_%sv%s", u.OS, u.Arch, u.ARMVersion)
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}
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val, ok := json[key]
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if !ok {
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// the key is download_linux_arm or download_linux_arm64 for regular ARM versions
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key = fmt.Sprintf("download_%s_%s", u.OS, u.Arch)
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val, ok = json[key]
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}
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if !ok {
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return "", false
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}
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return val.(string), true
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}
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