/
region_uc_v4.go
208 lines (174 loc) · 4.8 KB
/
region_uc_v4.go
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package storage
import (
"context"
"encoding/json"
"fmt"
"math"
"os"
"path/filepath"
"sync"
"time"
"golang.org/x/sync/singleflight"
"github.com/qiniu/go-sdk/v7/internal/clientv2"
)
type ucQueryV4Ret struct {
Hosts []ucQueryV4Region `json:"hosts"`
}
type ucQueryV4Region struct {
RegionId string `json:"region"`
TTL int `json:"ttl"`
Io ucQueryV4Server `json:"io"`
IoSrc ucQueryV4Server `json:"io_src"`
Up ucQueryV4Server `json:"up"`
Rs ucQueryV4Server `json:"rs"`
Rsf ucQueryV4Server `json:"rsf"`
Api ucQueryV4Server `json:"api"`
}
type ucQueryV4Server struct {
Domains []string `json:"domains"`
Old []string `json:"old"`
}
func (s *ucQueryV4Server) getOneServer() string {
if len(s.Domains) > 0 {
return s.Domains[0]
}
if len(s.Old) > 0 {
return s.Old[0]
}
return ""
}
var ucQueryV4Group singleflight.Group
type regionV4CacheValue struct {
Regions []*Region `json:"regions"`
Deadline time.Time `json:"deadline"`
}
func (r *regionV4CacheValue) getRegions() []*Region {
if r == nil {
return nil
}
return r.Regions
}
type regionV4CacheMap map[string]regionV4CacheValue
const regionV4CacheFileName = "query_v4_00.cache.json"
var (
regionV4CachePath = filepath.Join(os.TempDir(), "qiniu-golang-sdk", regionV4CacheFileName)
regionV4Cache sync.Map
regionV4CacheLock sync.RWMutex
regionV4CacheSyncLock sync.Mutex
regionV4CacheLoaded bool = false
)
func setRegionV4CachePath(newPath string) {
cacheDir := filepath.Dir(newPath)
if len(cacheDir) == 0 {
return
}
regionV4CacheLock.Lock()
defer regionV4CacheLock.Unlock()
regionV4CachePath = filepath.Join(cacheDir, regionV4CacheFileName)
regionV4CacheLoaded = false
}
func loadRegionV4Cache() {
cacheFile, err := os.Open(regionV4CachePath)
if err != nil {
return
}
defer cacheFile.Close()
var cacheMap regionV4CacheMap
if err = json.NewDecoder(cacheFile).Decode(&cacheMap); err != nil {
return
}
for cacheKey, cacheValue := range cacheMap {
regionV4Cache.Store(cacheKey, cacheValue)
}
}
func storeRegionV4Cache() {
err := os.MkdirAll(filepath.Dir(regionV4CachePath), 0700)
if err != nil {
return
}
cacheFile, err := os.OpenFile(regionV4CachePath, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, 0600)
if err != nil {
return
}
defer cacheFile.Close()
cacheMap := make(regionV4CacheMap)
regionV4Cache.Range(func(cacheKey, cacheValue interface{}) bool {
cacheMap[cacheKey.(string)] = cacheValue.(regionV4CacheValue)
return true
})
if err = json.NewEncoder(cacheFile).Encode(cacheMap); err != nil {
return
}
}
func getRegionByV4(ak, bucket string, options UCApiOptions) (*RegionGroup, error) {
options.init()
regionV4CacheLock.RLock()
if regionV4CacheLoaded {
regionV4CacheLock.RUnlock()
} else {
regionV4CacheLock.RUnlock()
func() {
regionV4CacheLock.Lock()
defer regionV4CacheLock.Unlock()
if !regionV4CacheLoaded {
loadRegionV4Cache()
regionV4CacheLoaded = true
}
}()
}
regionCacheKey := makeRegionCacheKey(ak, bucket, options.Hosts)
//check from cache
if v, ok := regionV4Cache.Load(regionCacheKey); ok && time.Now().Before(v.(regionV4CacheValue).Deadline) {
cacheValue, _ := v.(regionV4CacheValue)
return NewRegionGroup(cacheValue.getRegions()...), nil
}
newRegion, err, _ := ucQueryV4Group.Do(regionCacheKey, func() (interface{}, error) {
reqURL := fmt.Sprintf("%s/v4/query?ak=%s&bucket=%s", endpoint(options.UseHttps, options.firstHost()), ak, bucket)
var ret ucQueryV4Ret
c := getUCClient(ucClientConfig{
IsUcQueryApi: true,
RetryMax: options.RetryMax,
Hosts: options.Hosts,
HostFreezeDuration: options.HostFreezeDuration,
Client: options.Client,
}, nil)
err := clientv2.DoAndDecodeJsonResponse(c, clientv2.RequestParams{
Context: context.Background(),
Method: clientv2.RequestMethodGet,
Url: reqURL,
Header: nil,
GetBody: nil,
}, &ret)
if err != nil {
return nil, fmt.Errorf("query region error, %s", err.Error())
}
ttl := math.MaxInt32
regions := make([]*Region, 0)
for _, host := range ret.Hosts {
if ttl > host.TTL {
ttl = host.TTL
}
regions = append(regions, &Region{
SrcUpHosts: host.Up.Domains,
CdnUpHosts: host.Up.Domains,
RsHost: host.Rs.getOneServer(),
RsfHost: host.Rsf.getOneServer(),
ApiHost: host.Api.getOneServer(),
IovipHost: host.Io.getOneServer(),
IoSrcHost: host.IoSrc.getOneServer(),
})
}
regionV4Cache.Store(regionCacheKey, regionV4CacheValue{
Regions: regions,
Deadline: time.Now().Add(time.Duration(ttl) * time.Second),
})
regionV4CacheSyncLock.Lock()
defer regionV4CacheSyncLock.Unlock()
storeRegionV4Cache()
return NewRegionGroup(regions...), nil
})
if newRegion == nil {
return nil, err
}
return newRegion.(*RegionGroup), err
}