func (n *node) expirationAndTTL(clock clockwork.Clock) (*time.Time, int64) { if !n.IsPermanent() { /* compute ttl as: ceiling( (expireTime - timeNow) / nanosecondsPerSecond ) which ranges from 1..n rather than as: ( (expireTime - timeNow) / nanosecondsPerSecond ) + 1 which ranges 1..n+1 */ ttlN := n.ExpireTime.Sub(clock.Now()) ttl := ttlN / time.Second if (ttlN % time.Second) > 0 { ttl++ } return &n.ExpireTime, int64(ttl) } return nil, 0 }
// parseKeyRequest converts a received http.Request on keysPrefix to // a server Request, performing validation of supplied fields as appropriate. // If any validation fails, an empty Request and non-nil error is returned. func parseKeyRequest(r *http.Request, clock clockwork.Clock) (etcdserverpb.Request, error) { emptyReq := etcdserverpb.Request{} err := r.ParseForm() if err != nil { return emptyReq, etcdErr.NewRequestError( etcdErr.EcodeInvalidForm, err.Error(), ) } if !strings.HasPrefix(r.URL.Path, keysPrefix) { return emptyReq, etcdErr.NewRequestError( etcdErr.EcodeInvalidForm, "incorrect key prefix", ) } p := path.Join(etcdserver.StoreKeysPrefix, r.URL.Path[len(keysPrefix):]) var pIdx, wIdx uint64 if pIdx, err = getUint64(r.Form, "prevIndex"); err != nil { return emptyReq, etcdErr.NewRequestError( etcdErr.EcodeIndexNaN, `invalid value for "prevIndex"`, ) } if wIdx, err = getUint64(r.Form, "waitIndex"); err != nil { return emptyReq, etcdErr.NewRequestError( etcdErr.EcodeIndexNaN, `invalid value for "waitIndex"`, ) } var rec, sort, wait, dir, quorum, stream, blocking bool if rec, err = getBool(r.Form, "recursive"); err != nil { return emptyReq, etcdErr.NewRequestError( etcdErr.EcodeInvalidField, `invalid value for "recursive"`, ) } if sort, err = getBool(r.Form, "sorted"); err != nil { return emptyReq, etcdErr.NewRequestError( etcdErr.EcodeInvalidField, `invalid value for "sorted"`, ) } if wait, err = getBool(r.Form, "wait"); err != nil { return emptyReq, etcdErr.NewRequestError( etcdErr.EcodeInvalidField, `invalid value for "wait"`, ) } // TODO(jonboulle): define what parameters dir is/isn't compatible with? if dir, err = getBool(r.Form, "dir"); err != nil { return emptyReq, etcdErr.NewRequestError( etcdErr.EcodeInvalidField, `invalid value for "dir"`, ) } //if not specified, quorum should be true if quorum, err = getBool(r.Form, "quorum"); err != nil { return emptyReq, etcdErr.NewRequestError( etcdErr.EcodeInvalidField, `invalid value for "quorum"`, ) } else if _, exists := r.Form["quorum"]; !exists { quorum = true } if stream, err = getBool(r.Form, "stream"); err != nil { return emptyReq, etcdErr.NewRequestError( etcdErr.EcodeInvalidField, `invalid value for "stream"`, ) } if blocking, err = getBool(r.Form, "blocking"); err != nil { return emptyReq, etcdErr.NewRequestError( etcdErr.EcodeInvalidField, `invalid value for "blocking"`, ) } if wait && r.Method != "GET" { return emptyReq, etcdErr.NewRequestError( etcdErr.EcodeInvalidField, `"wait" can only be used with GET requests`, ) } pV := r.FormValue("prevValue") if _, ok := r.Form["prevValue"]; ok && pV == "" { return emptyReq, etcdErr.NewRequestError( etcdErr.EcodePrevValueRequired, `"prevValue" cannot be empty`, ) } // TTL is nullable, so leave it null if not specified // or an empty string var ttl *uint64 if len(r.FormValue("ttl")) > 0 { i, err := getUint64(r.Form, "ttl") if err != nil { return emptyReq, etcdErr.NewRequestError( etcdErr.EcodeTTLNaN, `invalid value for "ttl"`, ) } ttl = &i } // prevExist is nullable, so leave it null if not specified var pe *bool if _, ok := r.Form["prevExist"]; ok { bv, err := getBool(r.Form, "prevExist") if err != nil { return emptyReq, etcdErr.NewRequestError( etcdErr.EcodeInvalidField, "invalid value for prevExist", ) } pe = &bv } rr := etcdserverpb.Request{ Method: r.Method, Path: p, Val: r.FormValue("value"), Dir: dir, PrevValue: pV, PrevIndex: pIdx, PrevExist: pe, Wait: wait, Since: wIdx, Recursive: rec, Sorted: sort, Quorum: quorum, Stream: stream, Blocking: blocking, } if pe != nil { rr.PrevExist = pe } // Null TTL is equivalent to unset Expiration if ttl != nil { expr := time.Duration(*ttl) * time.Second rr.Expiration = clock.Now().Add(expr).UnixNano() } return rr, nil }