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// Copyright 2021 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package updatechecker
import (
"context"
"errors"
"io"
"net"
"net/http"
"strings"
"code.gitea.io/gitea/modules/json"
"code.gitea.io/gitea/modules/proxy"
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/modules/system"
"github.com/hashicorp/go-version"
)
// CheckerState stores the remote version from the JSON endpoint
type CheckerState struct {
LatestVersion string
}
// Name returns the name of the state item for update checker
func (r *CheckerState) Name() string {
return "update-checker"
}
// GiteaUpdateChecker returns error when new version of Gitea is available
func GiteaUpdateChecker(httpEndpoint, domainEndpoint string) error {
var version string
var err error
if domainEndpoint != "" {
version, err = getVersionDNS(domainEndpoint)
} else {
version, err = getVersionHTTP(httpEndpoint)
}
if err != nil {
return err
}
return UpdateRemoteVersion(context.Background(), version)
}
// getVersionDNS will request the TXT records for the domain. If a record starts
// with "forgejo_versions=" everything after that will be used as the latest
// version available.
func getVersionDNS(domainEndpoint string) (version string, err error) {
records, err := net.LookupTXT(domainEndpoint)
if err != nil {
return "", err
}
if len(records) == 0 {
return "", errors.New("no TXT records were found")
}
for _, record := range records {
if strings.HasPrefix(record, "forgejo_versions=") {
// Get all supported versions, separated by a comma.
supportedVersions := strings.Split(strings.TrimPrefix(record, "forgejo_versions="), ",")
// For now always return the latest supported version.
return supportedVersions[len(supportedVersions)-1], nil
}
}
return "", errors.New("there is no TXT record with a valid value")
}
// getVersionHTTP will make an HTTP request to the endpoint, and the returned
// content is JSON. The "latest.version" path's value will be used as the latest
// version available.
func getVersionHTTP(httpEndpoint string) (version string, err error) {
httpClient := &http.Client{
Transport: &http.Transport{
Proxy: proxy.Proxy(),
},
}
req, err := http.NewRequest("GET", httpEndpoint, nil)
if err != nil {
return "", err
}
resp, err := httpClient.Do(req)
if err != nil {
return "", err
}
defer resp.Body.Close()
body, err := io.ReadAll(resp.Body)
if err != nil {
return "", err
}
type respType struct {
Latest struct {
Version string `json:"version"`
} `json:"latest"`
}
respData := respType{}
err = json.Unmarshal(body, &respData)
if err != nil {
return "", err
}
return respData.Latest.Version, nil
}
// UpdateRemoteVersion updates the latest available version of Gitea
func UpdateRemoteVersion(ctx context.Context, version string) (err error) {
return system.AppState.Set(ctx, &CheckerState{LatestVersion: version})
}
// GetRemoteVersion returns the current remote version (or currently installed version if fail to fetch from DB)
func GetRemoteVersion(ctx context.Context) string {
item := new(CheckerState)
if err := system.AppState.Get(ctx, item); err != nil {
return ""
}
return item.LatestVersion
}
// GetNeedUpdate returns true whether a newer version of Gitea is available
func GetNeedUpdate(ctx context.Context) bool {
curVer, err := version.NewVersion(setting.AppVer)
if err != nil {
// return false to fail silently
return false
}
remoteVerStr := GetRemoteVersion(ctx)
if remoteVerStr == "" {
// no remote version is known
return false
}
remoteVer, err := version.NewVersion(remoteVerStr)
if err != nil {
// return false to fail silently
return false
}
return curVer.LessThan(remoteVer)
}
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