forked from Silverfish/proton-bridge
93 lines
2.0 KiB
Go
93 lines
2.0 KiB
Go
package updater
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import (
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"bytes"
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"context"
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"encoding/json"
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"fmt"
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"io"
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"github.com/Masterminds/semver/v3"
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"github.com/ProtonMail/gopenpgp/v2/crypto"
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"github.com/pkg/errors"
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)
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var (
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ErrDownloadVerify = errors.New("failed to download or verify the update")
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ErrInstall = errors.New("failed to install the update")
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)
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type Downloader interface {
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DownloadAndVerify(ctx context.Context, kr *crypto.KeyRing, url, sig string) ([]byte, error)
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}
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type Installer interface {
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InstallUpdate(*semver.Version, io.Reader) error
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}
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type Updater struct {
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installer Installer
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verifier *crypto.KeyRing
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product string
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platform string
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}
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func NewUpdater(installer Installer, verifier *crypto.KeyRing, product, platform string) *Updater {
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return &Updater{
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installer: installer,
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verifier: verifier,
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product: product,
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platform: platform,
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}
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}
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func (u *Updater) GetVersionInfo(downloader Downloader, channel Channel) (VersionInfo, error) {
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b, err := downloader.DownloadAndVerify(
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context.Background(),
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u.verifier,
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u.getVersionFileURL(),
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u.getVersionFileURL()+".sig",
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)
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if err != nil {
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return VersionInfo{}, err
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}
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var versionMap VersionMap
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if err := json.Unmarshal(b, &versionMap); err != nil {
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return VersionInfo{}, err
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}
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version, ok := versionMap[channel]
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if !ok {
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return VersionInfo{}, errors.New("no updates available for this channel")
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}
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return version, nil
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}
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func (u *Updater) InstallUpdate(downloader Downloader, update VersionInfo) error {
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b, err := downloader.DownloadAndVerify(
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context.Background(),
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u.verifier,
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update.Package,
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update.Package+".sig",
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)
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if err != nil {
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return ErrDownloadVerify
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}
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if err := u.installer.InstallUpdate(update.Version, bytes.NewReader(b)); err != nil {
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return ErrInstall
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}
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return nil
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}
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// getVersionFileURL returns the URL of the version file.
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// For example:
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// - https://protonmail.com/download/bridge/version_linux.json
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func (u *Updater) getVersionFileURL() string {
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return fmt.Sprintf("%v/%v/version_%v.json", Host, u.product, u.platform)
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}
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