mirror of
https://github.com/siyuan-note/siyuan.git
synced 2026-06-28 06:46:12 +00:00
257 lines
7.4 KiB
Go
257 lines
7.4 KiB
Go
// SiYuan - Refactor your thinking
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// Copyright (c) 2020-present, b3log.org
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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package bazaar
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import (
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"context"
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"errors"
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"maps"
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"sync"
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"github.com/siyuan-note/httpclient"
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"github.com/siyuan-note/logging"
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"github.com/siyuan-note/siyuan/kernel/util"
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"golang.org/x/sync/singleflight"
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)
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var (
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bazaarMemMu sync.RWMutex
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bazaarCacheRhyHash string // bazaar hash，发生变更时清空以下缓存
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stageIndexCache = make(map[string]*StageIndex) // pkgType -> 集市包索引
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bazaarStatsCache = make(map[string]*bazaarStats) // 集市统计数据
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installSizeCache = make(map[string]int64) // repoURL -> 安装大小
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)
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func applyRhyBazaarHash(ctx context.Context) {
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bazaarHash := util.GetRhyBazaarHash(ctx)
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if "" == bazaarHash {
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return
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}
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bazaarMemMu.Lock()
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defer bazaarMemMu.Unlock()
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if bazaarCacheRhyHash != "" && bazaarHash != bazaarCacheRhyHash {
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clear(stageIndexCache)
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clear(bazaarStatsCache)
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clear(installSizeCache)
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logging.LogInfof("rhy bazaar hash changed, clearing bazaar caches")
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}
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bazaarCacheRhyHash = bazaarHash
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}
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type StageBazaarResult struct {
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StageIndex *StageIndex // stage 索引
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BazaarStats map[string]*bazaarStats // 统计信息
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Online bool // online 状态
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StageErr error // stage 错误
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}
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var stageBazaarFlight singleflight.Group
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var onlineCheckFlight singleflight.Group
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var bazaarStatsFlight singleflight.Group
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// getStageAndBazaar 获取 stage 索引和 bazaar 索引，相同 pkgType 的并发调用会合并为一次实际请求 (single-flight)
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func getStageAndBazaar(pkgType string) (result StageBazaarResult) {
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key := "stageBazaar:" + pkgType
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v, err, _ := stageBazaarFlight.Do(key, func() (any, error) {
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return getStageAndBazaar0(pkgType), nil
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})
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if err != nil {
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return
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}
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result = v.(StageBazaarResult)
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return
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}
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// getStageAndBazaar0 执行一次 stage 和 bazaar 索引拉取
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func getStageAndBazaar0(pkgType string) (result StageBazaarResult) {
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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stageIndex := getStageIndexFromCache(ctx, pkgType)
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statsMap := getBazaarStatsFromCache(ctx)
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if nil != stageIndex && nil != statsMap {
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// 两者都从缓存返回，不需要 online 检查
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return StageBazaarResult{
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StageIndex: stageIndex,
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BazaarStats: statsMap,
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Online: true,
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StageErr: nil,
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}
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}
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var onlineResult bool
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onlineDone := make(chan bool, 1)
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var stageErr error
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wg := &sync.WaitGroup{}
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wg.Go(func() {
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onlineResult = isBazaarOnline()
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onlineDone <- true
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})
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wg.Go(func() {
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stageIndex, stageErr = getStageIndex(ctx, pkgType)
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})
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wg.Go(func() {
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statsMap = getBazaarStats(ctx)
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})
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<-onlineDone
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if !onlineResult {
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// 不在线时立即取消其他请求并返回结果，避免等待 HTTP 请求超时
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cancel()
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return StageBazaarResult{
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StageIndex: stageIndex,
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BazaarStats: statsMap,
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Online: false,
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StageErr: stageErr,
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}
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}
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// 在线时等待所有请求完成
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wg.Wait()
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return StageBazaarResult{
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StageIndex: stageIndex,
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BazaarStats: statsMap,
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Online: onlineResult,
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StageErr: stageErr,
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}
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}
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func isBazaarOnline() bool {
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v, err, _ := onlineCheckFlight.Do("bazaarOnline", func() (any, error) {
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return isBazaarOnline0(), nil
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})
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if err != nil {
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return false
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}
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return v.(bool)
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}
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func isBazaarOnline0() (ret bool) {
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// Improve marketplace loading when offline https://github.com/siyuan-note/siyuan/issues/12050
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ret = util.IsOnline(util.BazaarOSSServer+"/204", true, 3000)
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if !ret {
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util.PushErrMsg(util.Langs[util.Lang][24], 5000)
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}
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return
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}
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// getStageIndexFromCache 仅从缓存获取 stage 索引，无缓存时返回 nil（读前根据 util 已同步的 bazaar hash 视情况清理缓存）
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func getStageIndexFromCache(ctx context.Context, pkgType string) *StageIndex {
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applyRhyBazaarHash(ctx)
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bazaarMemMu.RLock()
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defer bazaarMemMu.RUnlock()
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return stageIndexCache[pkgType]
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}
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// getStageIndex 获取 stage 索引
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func getStageIndex(ctx context.Context, pkgType string) (ret *StageIndex, err error) {
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if cached := getStageIndexFromCache(ctx, pkgType); nil != cached {
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ret = cached
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return
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}
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bazaarHash := util.GetRhyBazaarHash(ctx)
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if "" == bazaarHash {
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logging.LogErrorf("bazaar hash unavailable (rhy missing or invalid bazaar field)")
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err = errors.New("bazaar hash not available")
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return
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}
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ret = &StageIndex{}
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request := httpclient.NewBrowserRequest()
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u := util.BazaarOSSServer + "/bazaar@" + bazaarHash + "/stage/" + pkgType + ".json" // pkgType 单词为复数形式
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resp, reqErr := request.SetContext(ctx).SetSuccessResult(ret).Get(u)
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if nil != reqErr {
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logging.LogErrorf("get community stage index [%s] failed: %s", u, reqErr)
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err = reqErr
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return
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}
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if 200 != resp.StatusCode {
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logging.LogErrorf("get community stage index [%s] failed: %d", u, resp.StatusCode)
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err = errors.New("get stage index failed")
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return
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}
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bazaarMemMu.Lock()
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stageIndexCache[pkgType] = ret
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bazaarMemMu.Unlock()
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return
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}
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// getStageRepoByURL 根据 pkgType 与 url（owner/repo@hash）获取 StageRepo
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func getStageRepoByURL(ctx context.Context, pkgType, url string) *StageRepo {
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stageIndex, _ := getStageIndex(ctx, pkgType)
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if nil == stageIndex {
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return nil
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}
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stageIndex.reposOnce.Do(func() {
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stageIndex.reposByURL = make(map[string]*StageRepo, len(stageIndex.Repos))
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for _, r := range stageIndex.Repos {
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stageIndex.reposByURL[r.URL] = r
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}
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})
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return stageIndex.reposByURL[url]
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}
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// bazaarStats 集市包统计信息
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type bazaarStats struct {
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Downloads int `json:"downloads"` // 下载次数
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}
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// getBazaarStatsFromCache 仅从缓存获取集市包统计信息，无缓存时返回 nil
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func getBazaarStatsFromCache(ctx context.Context) (ret map[string]*bazaarStats) {
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applyRhyBazaarHash(ctx)
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bazaarMemMu.RLock()
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defer bazaarMemMu.RUnlock()
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if 0 == len(bazaarStatsCache) {
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return nil
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}
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return bazaarStatsCache
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}
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// getBazaarStats 获取集市包统计信息
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func getBazaarStats(ctx context.Context) map[string]*bazaarStats {
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if cached := getBazaarStatsFromCache(ctx); nil != cached {
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return cached
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}
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v, _, _ := bazaarStatsFlight.Do("bazaarStats", func() (any, error) {
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return getBazaarStats0(ctx), nil
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})
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return v.(map[string]*bazaarStats)
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}
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func getBazaarStats0(ctx context.Context) (result map[string]*bazaarStats) {
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request := httpclient.NewBrowserRequest()
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u := util.BazaarStatServer + "/bazaar/index.json"
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resp, reqErr := request.SetContext(ctx).SetSuccessResult(&result).Get(u)
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if nil != reqErr {
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logging.LogErrorf("get bazaar stats [%s] failed: %s", u, reqErr)
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return
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}
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if 200 != resp.StatusCode {
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logging.LogErrorf("get bazaar stats [%s] failed: %d", u, resp.StatusCode)
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return
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}
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if nil == result {
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result = make(map[string]*bazaarStats)
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}
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bazaarMemMu.Lock()
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clear(bazaarStatsCache)
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maps.Copy(bazaarStatsCache, result)
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bazaarMemMu.Unlock()
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return
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}
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