mirror of
https://github.com/go-gitea/gitea.git
synced 2024-08-25 21:57:29 +02:00
* Dropped unused codekit config * Integrated dynamic and static bindata for public * Ignore public bindata * Add a general generate make task * Integrated flexible public assets into web command * Updated vendoring, added all missiong govendor deps * Made the linter happy with the bindata and dynamic code * Moved public bindata definition to modules directory * Ignoring the new bindata path now * Updated to the new public modules import path * Updated public bindata command and drop the new prefix
789 lines
19 KiB
Go
789 lines
19 KiB
Go
package zk
|
|
|
|
/*
|
|
TODO:
|
|
* make sure a ping response comes back in a reasonable time
|
|
|
|
Possible watcher events:
|
|
* Event{Type: EventNotWatching, State: StateDisconnected, Path: path, Err: err}
|
|
*/
|
|
|
|
import (
|
|
"crypto/rand"
|
|
"encoding/binary"
|
|
"errors"
|
|
"fmt"
|
|
"io"
|
|
"log"
|
|
"net"
|
|
"strconv"
|
|
"strings"
|
|
"sync"
|
|
"sync/atomic"
|
|
"time"
|
|
)
|
|
|
|
var ErrNoServer = errors.New("zk: could not connect to a server")
|
|
|
|
const (
|
|
bufferSize = 10 * 1024 * 1024
|
|
eventChanSize = 6
|
|
sendChanSize = 16
|
|
protectedPrefix = "_c_"
|
|
)
|
|
|
|
type watchType int
|
|
|
|
const (
|
|
watchTypeData = iota
|
|
watchTypeExist = iota
|
|
watchTypeChild = iota
|
|
)
|
|
|
|
type watchPathType struct {
|
|
path string
|
|
wType watchType
|
|
}
|
|
|
|
type Dialer func(network, address string, timeout time.Duration) (net.Conn, error)
|
|
|
|
type Conn struct {
|
|
lastZxid int64
|
|
sessionID int64
|
|
state State // must be 32-bit aligned
|
|
xid int32
|
|
timeout int32 // session timeout in seconds
|
|
passwd []byte
|
|
|
|
dialer Dialer
|
|
servers []string
|
|
serverIndex int
|
|
conn net.Conn
|
|
eventChan chan Event
|
|
shouldQuit chan bool
|
|
pingInterval time.Duration
|
|
recvTimeout time.Duration
|
|
connectTimeout time.Duration
|
|
|
|
sendChan chan *request
|
|
requests map[int32]*request // Xid -> pending request
|
|
requestsLock sync.Mutex
|
|
watchers map[watchPathType][]chan Event
|
|
watchersLock sync.Mutex
|
|
|
|
// Debug (used by unit tests)
|
|
reconnectDelay time.Duration
|
|
}
|
|
|
|
type request struct {
|
|
xid int32
|
|
opcode int32
|
|
pkt interface{}
|
|
recvStruct interface{}
|
|
recvChan chan response
|
|
|
|
// Because sending and receiving happen in separate go routines, there's
|
|
// a possible race condition when creating watches from outside the read
|
|
// loop. We must ensure that a watcher gets added to the list synchronously
|
|
// with the response from the server on any request that creates a watch.
|
|
// In order to not hard code the watch logic for each opcode in the recv
|
|
// loop the caller can use recvFunc to insert some synchronously code
|
|
// after a response.
|
|
recvFunc func(*request, *responseHeader, error)
|
|
}
|
|
|
|
type response struct {
|
|
zxid int64
|
|
err error
|
|
}
|
|
|
|
type Event struct {
|
|
Type EventType
|
|
State State
|
|
Path string // For non-session events, the path of the watched node.
|
|
Err error
|
|
}
|
|
|
|
func Connect(servers []string, recvTimeout time.Duration) (*Conn, <-chan Event, error) {
|
|
return ConnectWithDialer(servers, recvTimeout, nil)
|
|
}
|
|
|
|
func ConnectWithDialer(servers []string, recvTimeout time.Duration, dialer Dialer) (*Conn, <-chan Event, error) {
|
|
// Randomize the order of the servers to avoid creating hotspots
|
|
stringShuffle(servers)
|
|
|
|
for i, addr := range servers {
|
|
if !strings.Contains(addr, ":") {
|
|
servers[i] = addr + ":" + strconv.Itoa(DefaultPort)
|
|
}
|
|
}
|
|
ec := make(chan Event, eventChanSize)
|
|
if dialer == nil {
|
|
dialer = net.DialTimeout
|
|
}
|
|
conn := Conn{
|
|
dialer: dialer,
|
|
servers: servers,
|
|
serverIndex: 0,
|
|
conn: nil,
|
|
state: StateDisconnected,
|
|
eventChan: ec,
|
|
shouldQuit: make(chan bool),
|
|
recvTimeout: recvTimeout,
|
|
pingInterval: time.Duration((int64(recvTimeout) / 2)),
|
|
connectTimeout: 1 * time.Second,
|
|
sendChan: make(chan *request, sendChanSize),
|
|
requests: make(map[int32]*request),
|
|
watchers: make(map[watchPathType][]chan Event),
|
|
passwd: emptyPassword,
|
|
timeout: 30000,
|
|
|
|
// Debug
|
|
reconnectDelay: time.Second,
|
|
}
|
|
go func() {
|
|
conn.loop()
|
|
conn.flushRequests(ErrClosing)
|
|
conn.invalidateWatches(ErrClosing)
|
|
close(conn.eventChan)
|
|
}()
|
|
return &conn, ec, nil
|
|
}
|
|
|
|
func (c *Conn) Close() {
|
|
close(c.shouldQuit)
|
|
|
|
select {
|
|
case <-c.queueRequest(opClose, &closeRequest{}, &closeResponse{}, nil):
|
|
case <-time.After(time.Second):
|
|
}
|
|
}
|
|
|
|
func (c *Conn) State() State {
|
|
return State(atomic.LoadInt32((*int32)(&c.state)))
|
|
}
|
|
|
|
func (c *Conn) setState(state State) {
|
|
atomic.StoreInt32((*int32)(&c.state), int32(state))
|
|
select {
|
|
case c.eventChan <- Event{Type: EventSession, State: state}:
|
|
default:
|
|
// panic("zk: event channel full - it must be monitored and never allowed to be full")
|
|
}
|
|
}
|
|
|
|
func (c *Conn) connect() {
|
|
c.serverIndex = (c.serverIndex + 1) % len(c.servers)
|
|
startIndex := c.serverIndex
|
|
c.setState(StateConnecting)
|
|
for {
|
|
zkConn, err := c.dialer("tcp", c.servers[c.serverIndex], c.connectTimeout)
|
|
if err == nil {
|
|
c.conn = zkConn
|
|
c.setState(StateConnected)
|
|
return
|
|
}
|
|
|
|
log.Printf("Failed to connect to %s: %+v", c.servers[c.serverIndex], err)
|
|
|
|
c.serverIndex = (c.serverIndex + 1) % len(c.servers)
|
|
if c.serverIndex == startIndex {
|
|
c.flushUnsentRequests(ErrNoServer)
|
|
time.Sleep(time.Second)
|
|
}
|
|
}
|
|
}
|
|
|
|
func (c *Conn) loop() {
|
|
for {
|
|
c.connect()
|
|
err := c.authenticate()
|
|
switch {
|
|
case err == ErrSessionExpired:
|
|
c.invalidateWatches(err)
|
|
case err != nil && c.conn != nil:
|
|
c.conn.Close()
|
|
case err == nil:
|
|
closeChan := make(chan bool) // channel to tell send loop stop
|
|
var wg sync.WaitGroup
|
|
|
|
wg.Add(1)
|
|
go func() {
|
|
c.sendLoop(c.conn, closeChan)
|
|
c.conn.Close() // causes recv loop to EOF/exit
|
|
wg.Done()
|
|
}()
|
|
|
|
wg.Add(1)
|
|
go func() {
|
|
err = c.recvLoop(c.conn)
|
|
if err == nil {
|
|
panic("zk: recvLoop should never return nil error")
|
|
}
|
|
close(closeChan) // tell send loop to exit
|
|
wg.Done()
|
|
}()
|
|
|
|
wg.Wait()
|
|
}
|
|
|
|
c.setState(StateDisconnected)
|
|
|
|
// Yeesh
|
|
if err != io.EOF && err != ErrSessionExpired && !strings.Contains(err.Error(), "use of closed network connection") {
|
|
log.Println(err)
|
|
}
|
|
|
|
select {
|
|
case <-c.shouldQuit:
|
|
c.flushRequests(ErrClosing)
|
|
return
|
|
default:
|
|
}
|
|
|
|
if err != ErrSessionExpired {
|
|
err = ErrConnectionClosed
|
|
}
|
|
c.flushRequests(err)
|
|
|
|
if c.reconnectDelay > 0 {
|
|
select {
|
|
case <-c.shouldQuit:
|
|
return
|
|
case <-time.After(c.reconnectDelay):
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func (c *Conn) flushUnsentRequests(err error) {
|
|
for {
|
|
select {
|
|
default:
|
|
return
|
|
case req := <-c.sendChan:
|
|
req.recvChan <- response{-1, err}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Send error to all pending requests and clear request map
|
|
func (c *Conn) flushRequests(err error) {
|
|
c.requestsLock.Lock()
|
|
for _, req := range c.requests {
|
|
req.recvChan <- response{-1, err}
|
|
}
|
|
c.requests = make(map[int32]*request)
|
|
c.requestsLock.Unlock()
|
|
}
|
|
|
|
// Send error to all watchers and clear watchers map
|
|
func (c *Conn) invalidateWatches(err error) {
|
|
c.watchersLock.Lock()
|
|
defer c.watchersLock.Unlock()
|
|
|
|
if len(c.watchers) >= 0 {
|
|
for pathType, watchers := range c.watchers {
|
|
ev := Event{Type: EventNotWatching, State: StateDisconnected, Path: pathType.path, Err: err}
|
|
for _, ch := range watchers {
|
|
ch <- ev
|
|
close(ch)
|
|
}
|
|
}
|
|
c.watchers = make(map[watchPathType][]chan Event)
|
|
}
|
|
}
|
|
|
|
func (c *Conn) sendSetWatches() {
|
|
c.watchersLock.Lock()
|
|
defer c.watchersLock.Unlock()
|
|
|
|
if len(c.watchers) == 0 {
|
|
return
|
|
}
|
|
|
|
req := &setWatchesRequest{
|
|
RelativeZxid: c.lastZxid,
|
|
DataWatches: make([]string, 0),
|
|
ExistWatches: make([]string, 0),
|
|
ChildWatches: make([]string, 0),
|
|
}
|
|
n := 0
|
|
for pathType, watchers := range c.watchers {
|
|
if len(watchers) == 0 {
|
|
continue
|
|
}
|
|
switch pathType.wType {
|
|
case watchTypeData:
|
|
req.DataWatches = append(req.DataWatches, pathType.path)
|
|
case watchTypeExist:
|
|
req.ExistWatches = append(req.ExistWatches, pathType.path)
|
|
case watchTypeChild:
|
|
req.ChildWatches = append(req.ChildWatches, pathType.path)
|
|
}
|
|
n++
|
|
}
|
|
if n == 0 {
|
|
return
|
|
}
|
|
|
|
go func() {
|
|
res := &setWatchesResponse{}
|
|
_, err := c.request(opSetWatches, req, res, nil)
|
|
if err != nil {
|
|
log.Printf("Failed to set previous watches: %s", err.Error())
|
|
}
|
|
}()
|
|
}
|
|
|
|
func (c *Conn) authenticate() error {
|
|
buf := make([]byte, 256)
|
|
|
|
// connect request
|
|
|
|
n, err := encodePacket(buf[4:], &connectRequest{
|
|
ProtocolVersion: protocolVersion,
|
|
LastZxidSeen: c.lastZxid,
|
|
TimeOut: c.timeout,
|
|
SessionID: c.sessionID,
|
|
Passwd: c.passwd,
|
|
})
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
binary.BigEndian.PutUint32(buf[:4], uint32(n))
|
|
|
|
_, err = c.conn.Write(buf[:n+4])
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
c.sendSetWatches()
|
|
|
|
// connect response
|
|
|
|
// package length
|
|
_, err = io.ReadFull(c.conn, buf[:4])
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
blen := int(binary.BigEndian.Uint32(buf[:4]))
|
|
if cap(buf) < blen {
|
|
buf = make([]byte, blen)
|
|
}
|
|
|
|
_, err = io.ReadFull(c.conn, buf[:blen])
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
r := connectResponse{}
|
|
_, err = decodePacket(buf[:blen], &r)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if r.SessionID == 0 {
|
|
c.sessionID = 0
|
|
c.passwd = emptyPassword
|
|
c.lastZxid = 0
|
|
c.setState(StateExpired)
|
|
return ErrSessionExpired
|
|
}
|
|
|
|
if c.sessionID != r.SessionID {
|
|
atomic.StoreInt32(&c.xid, 0)
|
|
}
|
|
c.timeout = r.TimeOut
|
|
c.sessionID = r.SessionID
|
|
c.passwd = r.Passwd
|
|
c.setState(StateHasSession)
|
|
|
|
return nil
|
|
}
|
|
|
|
func (c *Conn) sendLoop(conn net.Conn, closeChan <-chan bool) error {
|
|
pingTicker := time.NewTicker(c.pingInterval)
|
|
defer pingTicker.Stop()
|
|
|
|
buf := make([]byte, bufferSize)
|
|
for {
|
|
select {
|
|
case req := <-c.sendChan:
|
|
header := &requestHeader{req.xid, req.opcode}
|
|
n, err := encodePacket(buf[4:], header)
|
|
if err != nil {
|
|
req.recvChan <- response{-1, err}
|
|
continue
|
|
}
|
|
|
|
n2, err := encodePacket(buf[4+n:], req.pkt)
|
|
if err != nil {
|
|
req.recvChan <- response{-1, err}
|
|
continue
|
|
}
|
|
|
|
n += n2
|
|
|
|
binary.BigEndian.PutUint32(buf[:4], uint32(n))
|
|
|
|
c.requestsLock.Lock()
|
|
select {
|
|
case <-closeChan:
|
|
req.recvChan <- response{-1, ErrConnectionClosed}
|
|
c.requestsLock.Unlock()
|
|
return ErrConnectionClosed
|
|
default:
|
|
}
|
|
c.requests[req.xid] = req
|
|
c.requestsLock.Unlock()
|
|
|
|
conn.SetWriteDeadline(time.Now().Add(c.recvTimeout))
|
|
_, err = conn.Write(buf[:n+4])
|
|
conn.SetWriteDeadline(time.Time{})
|
|
if err != nil {
|
|
req.recvChan <- response{-1, err}
|
|
conn.Close()
|
|
return err
|
|
}
|
|
case <-pingTicker.C:
|
|
n, err := encodePacket(buf[4:], &requestHeader{Xid: -2, Opcode: opPing})
|
|
if err != nil {
|
|
panic("zk: opPing should never fail to serialize")
|
|
}
|
|
|
|
binary.BigEndian.PutUint32(buf[:4], uint32(n))
|
|
|
|
conn.SetWriteDeadline(time.Now().Add(c.recvTimeout))
|
|
_, err = conn.Write(buf[:n+4])
|
|
conn.SetWriteDeadline(time.Time{})
|
|
if err != nil {
|
|
conn.Close()
|
|
return err
|
|
}
|
|
case <-closeChan:
|
|
return nil
|
|
}
|
|
}
|
|
}
|
|
|
|
func (c *Conn) recvLoop(conn net.Conn) error {
|
|
buf := make([]byte, bufferSize)
|
|
for {
|
|
// package length
|
|
conn.SetReadDeadline(time.Now().Add(c.recvTimeout))
|
|
_, err := io.ReadFull(conn, buf[:4])
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
blen := int(binary.BigEndian.Uint32(buf[:4]))
|
|
if cap(buf) < blen {
|
|
buf = make([]byte, blen)
|
|
}
|
|
|
|
_, err = io.ReadFull(conn, buf[:blen])
|
|
conn.SetReadDeadline(time.Time{})
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
res := responseHeader{}
|
|
_, err = decodePacket(buf[:16], &res)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if res.Xid == -1 {
|
|
res := &watcherEvent{}
|
|
_, err := decodePacket(buf[16:16+blen], res)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
ev := Event{
|
|
Type: res.Type,
|
|
State: res.State,
|
|
Path: res.Path,
|
|
Err: nil,
|
|
}
|
|
select {
|
|
case c.eventChan <- ev:
|
|
default:
|
|
}
|
|
wTypes := make([]watchType, 0, 2)
|
|
switch res.Type {
|
|
case EventNodeCreated:
|
|
wTypes = append(wTypes, watchTypeExist)
|
|
case EventNodeDeleted, EventNodeDataChanged:
|
|
wTypes = append(wTypes, watchTypeExist, watchTypeData, watchTypeChild)
|
|
case EventNodeChildrenChanged:
|
|
wTypes = append(wTypes, watchTypeChild)
|
|
}
|
|
c.watchersLock.Lock()
|
|
for _, t := range wTypes {
|
|
wpt := watchPathType{res.Path, t}
|
|
if watchers := c.watchers[wpt]; watchers != nil && len(watchers) > 0 {
|
|
for _, ch := range watchers {
|
|
ch <- ev
|
|
close(ch)
|
|
}
|
|
delete(c.watchers, wpt)
|
|
}
|
|
}
|
|
c.watchersLock.Unlock()
|
|
} else if res.Xid == -2 {
|
|
// Ping response. Ignore.
|
|
} else if res.Xid < 0 {
|
|
log.Printf("Xid < 0 (%d) but not ping or watcher event", res.Xid)
|
|
} else {
|
|
if res.Zxid > 0 {
|
|
c.lastZxid = res.Zxid
|
|
}
|
|
|
|
c.requestsLock.Lock()
|
|
req, ok := c.requests[res.Xid]
|
|
if ok {
|
|
delete(c.requests, res.Xid)
|
|
}
|
|
c.requestsLock.Unlock()
|
|
|
|
if !ok {
|
|
log.Printf("Response for unknown request with xid %d", res.Xid)
|
|
} else {
|
|
if res.Err != 0 {
|
|
err = res.Err.toError()
|
|
} else {
|
|
_, err = decodePacket(buf[16:16+blen], req.recvStruct)
|
|
}
|
|
if req.recvFunc != nil {
|
|
req.recvFunc(req, &res, err)
|
|
}
|
|
req.recvChan <- response{res.Zxid, err}
|
|
if req.opcode == opClose {
|
|
return io.EOF
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func (c *Conn) nextXid() int32 {
|
|
return atomic.AddInt32(&c.xid, 1)
|
|
}
|
|
|
|
func (c *Conn) addWatcher(path string, watchType watchType) <-chan Event {
|
|
c.watchersLock.Lock()
|
|
defer c.watchersLock.Unlock()
|
|
|
|
ch := make(chan Event, 1)
|
|
wpt := watchPathType{path, watchType}
|
|
c.watchers[wpt] = append(c.watchers[wpt], ch)
|
|
return ch
|
|
}
|
|
|
|
func (c *Conn) queueRequest(opcode int32, req interface{}, res interface{}, recvFunc func(*request, *responseHeader, error)) <-chan response {
|
|
rq := &request{
|
|
xid: c.nextXid(),
|
|
opcode: opcode,
|
|
pkt: req,
|
|
recvStruct: res,
|
|
recvChan: make(chan response, 1),
|
|
recvFunc: recvFunc,
|
|
}
|
|
c.sendChan <- rq
|
|
return rq.recvChan
|
|
}
|
|
|
|
func (c *Conn) request(opcode int32, req interface{}, res interface{}, recvFunc func(*request, *responseHeader, error)) (int64, error) {
|
|
r := <-c.queueRequest(opcode, req, res, recvFunc)
|
|
return r.zxid, r.err
|
|
}
|
|
|
|
func (c *Conn) AddAuth(scheme string, auth []byte) error {
|
|
_, err := c.request(opSetAuth, &setAuthRequest{Type: 0, Scheme: scheme, Auth: auth}, &setAuthResponse{}, nil)
|
|
return err
|
|
}
|
|
|
|
func (c *Conn) Children(path string) ([]string, Stat, error) {
|
|
res := &getChildren2Response{}
|
|
_, err := c.request(opGetChildren2, &getChildren2Request{Path: path, Watch: false}, res, nil)
|
|
return res.Children, &res.Stat, err
|
|
}
|
|
|
|
func (c *Conn) ChildrenW(path string) ([]string, Stat, <-chan Event, error) {
|
|
var ech <-chan Event
|
|
res := &getChildren2Response{}
|
|
_, err := c.request(opGetChildren2, &getChildren2Request{Path: path, Watch: true}, res, func(req *request, res *responseHeader, err error) {
|
|
if err == nil {
|
|
ech = c.addWatcher(path, watchTypeChild)
|
|
}
|
|
})
|
|
if err != nil {
|
|
return nil, nil, nil, err
|
|
}
|
|
return res.Children, &res.Stat, ech, err
|
|
}
|
|
|
|
func (c *Conn) Get(path string) ([]byte, Stat, error) {
|
|
res := &getDataResponse{}
|
|
_, err := c.request(opGetData, &getDataRequest{Path: path, Watch: false}, res, nil)
|
|
return res.Data, &res.Stat, err
|
|
}
|
|
|
|
// GetW returns the contents of a znode and sets a watch
|
|
func (c *Conn) GetW(path string) ([]byte, Stat, <-chan Event, error) {
|
|
var ech <-chan Event
|
|
res := &getDataResponse{}
|
|
_, err := c.request(opGetData, &getDataRequest{Path: path, Watch: true}, res, func(req *request, res *responseHeader, err error) {
|
|
if err == nil {
|
|
ech = c.addWatcher(path, watchTypeData)
|
|
}
|
|
})
|
|
if err != nil {
|
|
return nil, nil, nil, err
|
|
}
|
|
return res.Data, &res.Stat, ech, err
|
|
}
|
|
|
|
func (c *Conn) Set(path string, data []byte, version int32) (Stat, error) {
|
|
res := &setDataResponse{}
|
|
_, err := c.request(opSetData, &SetDataRequest{path, data, version}, res, nil)
|
|
return &res.Stat, err
|
|
}
|
|
|
|
func (c *Conn) Create(path string, data []byte, flags int32, acl []ACL) (string, error) {
|
|
res := &createResponse{}
|
|
_, err := c.request(opCreate, &CreateRequest{path, data, acl, flags}, res, nil)
|
|
return res.Path, err
|
|
}
|
|
|
|
// CreateProtectedEphemeralSequential fixes a race condition if the server crashes
|
|
// after it creates the node. On reconnect the session may still be valid so the
|
|
// ephemeral node still exists. Therefore, on reconnect we need to check if a node
|
|
// with a GUID generated on create exists.
|
|
func (c *Conn) CreateProtectedEphemeralSequential(path string, data []byte, acl []ACL) (string, error) {
|
|
var guid [16]byte
|
|
_, err := io.ReadFull(rand.Reader, guid[:16])
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
guidStr := fmt.Sprintf("%x", guid)
|
|
|
|
parts := strings.Split(path, "/")
|
|
parts[len(parts)-1] = fmt.Sprintf("%s%s-%s", protectedPrefix, guidStr, parts[len(parts)-1])
|
|
rootPath := strings.Join(parts[:len(parts)-1], "/")
|
|
protectedPath := strings.Join(parts, "/")
|
|
|
|
var newPath string
|
|
for i := 0; i < 3; i++ {
|
|
newPath, err = c.Create(protectedPath, data, FlagEphemeral|FlagSequence, acl)
|
|
switch err {
|
|
case ErrSessionExpired:
|
|
// No need to search for the node since it can't exist. Just try again.
|
|
case ErrConnectionClosed:
|
|
children, _, err := c.Children(rootPath)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
for _, p := range children {
|
|
parts := strings.Split(p, "/")
|
|
if pth := parts[len(parts)-1]; strings.HasPrefix(pth, protectedPrefix) {
|
|
if g := pth[len(protectedPrefix) : len(protectedPrefix)+32]; g == guidStr {
|
|
return rootPath + "/" + p, nil
|
|
}
|
|
}
|
|
}
|
|
case nil:
|
|
return newPath, nil
|
|
default:
|
|
return "", err
|
|
}
|
|
}
|
|
return "", err
|
|
}
|
|
|
|
func (c *Conn) Delete(path string, version int32) error {
|
|
_, err := c.request(opDelete, &DeleteRequest{path, version}, &deleteResponse{}, nil)
|
|
return err
|
|
}
|
|
|
|
func (c *Conn) Exists(path string) (bool, Stat, error) {
|
|
res := &existsResponse{}
|
|
_, err := c.request(opExists, &existsRequest{Path: path, Watch: false}, res, nil)
|
|
exists := true
|
|
if err == ErrNoNode {
|
|
exists = false
|
|
err = nil
|
|
}
|
|
return exists, &res.Stat, err
|
|
}
|
|
|
|
func (c *Conn) ExistsW(path string) (bool, Stat, <-chan Event, error) {
|
|
var ech <-chan Event
|
|
res := &existsResponse{}
|
|
_, err := c.request(opExists, &existsRequest{Path: path, Watch: true}, res, func(req *request, res *responseHeader, err error) {
|
|
if err == nil {
|
|
ech = c.addWatcher(path, watchTypeData)
|
|
} else if err == ErrNoNode {
|
|
ech = c.addWatcher(path, watchTypeExist)
|
|
}
|
|
})
|
|
exists := true
|
|
if err == ErrNoNode {
|
|
exists = false
|
|
err = nil
|
|
}
|
|
if err != nil {
|
|
return false, nil, nil, err
|
|
}
|
|
return exists, &res.Stat, ech, err
|
|
}
|
|
|
|
func (c *Conn) GetACL(path string) ([]ACL, Stat, error) {
|
|
res := &getAclResponse{}
|
|
_, err := c.request(opGetAcl, &getAclRequest{Path: path}, res, nil)
|
|
return res.Acl, &res.Stat, err
|
|
}
|
|
|
|
func (c *Conn) SetACL(path string, acl []ACL, version int32) (Stat, error) {
|
|
res := &setAclResponse{}
|
|
_, err := c.request(opSetAcl, &setAclRequest{Path: path, Acl: acl, Version: version}, res, nil)
|
|
return &res.Stat, err
|
|
}
|
|
|
|
func (c *Conn) Sync(path string) (string, error) {
|
|
res := &syncResponse{}
|
|
_, err := c.request(opSync, &syncRequest{Path: path}, res, nil)
|
|
return res.Path, err
|
|
}
|
|
|
|
type MultiOps struct {
|
|
Create []CreateRequest
|
|
Delete []DeleteRequest
|
|
SetData []SetDataRequest
|
|
Check []CheckVersionRequest
|
|
}
|
|
|
|
func (c *Conn) Multi(ops MultiOps) error {
|
|
req := &multiRequest{
|
|
Ops: make([]multiRequestOp, 0, len(ops.Create)+len(ops.Delete)+len(ops.SetData)+len(ops.Check)),
|
|
DoneHeader: multiHeader{Type: -1, Done: true, Err: -1},
|
|
}
|
|
for _, r := range ops.Create {
|
|
req.Ops = append(req.Ops, multiRequestOp{multiHeader{opCreate, false, -1}, r})
|
|
}
|
|
for _, r := range ops.SetData {
|
|
req.Ops = append(req.Ops, multiRequestOp{multiHeader{opSetData, false, -1}, r})
|
|
}
|
|
for _, r := range ops.Delete {
|
|
req.Ops = append(req.Ops, multiRequestOp{multiHeader{opDelete, false, -1}, r})
|
|
}
|
|
for _, r := range ops.Check {
|
|
req.Ops = append(req.Ops, multiRequestOp{multiHeader{opCheck, false, -1}, r})
|
|
}
|
|
res := &multiResponse{}
|
|
_, err := c.request(opMulti, req, res, nil)
|
|
return err
|
|
}
|