mirror of
https://github.com/nats-io/nats.go.git
synced 2025-10-28 02:42:14 +08:00
143 lines
4.1 KiB
Go
143 lines
4.1 KiB
Go
// Copyright 2020-2023 The NATS Authors
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package jetstream
|
|
|
|
import (
|
|
"context"
|
|
"encoding/json"
|
|
"strings"
|
|
)
|
|
|
|
type (
|
|
apiResponse struct {
|
|
Type string `json:"type"`
|
|
Error *APIError `json:"error,omitempty"`
|
|
}
|
|
|
|
// apiPaged includes variables used to create paged responses from the JSON API
|
|
apiPaged struct {
|
|
Total int `json:"total"`
|
|
Offset int `json:"offset"`
|
|
Limit int `json:"limit"`
|
|
}
|
|
)
|
|
|
|
// Request API subjects for JetStream.
|
|
const (
|
|
// DefaultAPIPrefix is the default prefix for the JetStream API.
|
|
DefaultAPIPrefix = "$JS.API."
|
|
|
|
// jsDomainT is used to create JetStream API prefix by specifying only Domain
|
|
jsDomainT = "$JS.%s.API."
|
|
|
|
// apiAccountInfo is for obtaining general information about JetStream.
|
|
apiAccountInfo = "INFO"
|
|
|
|
// apiConsumerCreateT is used to create consumers.
|
|
apiConsumerCreateT = "CONSUMER.CREATE.%s.%s"
|
|
|
|
// apiConsumerCreateT is used to create consumers.
|
|
// it accepts stream name, consumer name and filter subject
|
|
apiConsumerCreateWithFilterSubjectT = "CONSUMER.CREATE.%s.%s.%s"
|
|
|
|
// apiConsumerInfoT is used to create consumers.
|
|
apiConsumerInfoT = "CONSUMER.INFO.%s.%s"
|
|
|
|
// apiRequestNextT is the prefix for the request next message(s) for a consumer in worker/pull mode.
|
|
apiRequestNextT = "CONSUMER.MSG.NEXT.%s.%s"
|
|
|
|
// apiConsumerDeleteT is used to delete consumers.
|
|
apiConsumerDeleteT = "CONSUMER.DELETE.%s.%s"
|
|
|
|
// apiConsumerListT is used to return all detailed consumer information
|
|
apiConsumerListT = "CONSUMER.LIST.%s"
|
|
|
|
// apiConsumerNamesT is used to return a list with all consumer names for the stream.
|
|
apiConsumerNamesT = "CONSUMER.NAMES.%s"
|
|
|
|
// apiStreams can lookup a stream by subject.
|
|
apiStreams = "STREAM.NAMES"
|
|
|
|
// apiStreamCreateT is the endpoint to create new streams.
|
|
apiStreamCreateT = "STREAM.CREATE.%s"
|
|
|
|
// apiStreamInfoT is the endpoint to get information on a stream.
|
|
apiStreamInfoT = "STREAM.INFO.%s"
|
|
|
|
// apiStreamUpdateT is the endpoint to update existing streams.
|
|
apiStreamUpdateT = "STREAM.UPDATE.%s"
|
|
|
|
// apiStreamDeleteT is the endpoint to delete streams.
|
|
apiStreamDeleteT = "STREAM.DELETE.%s"
|
|
|
|
// apiStreamPurgeT is the endpoint to purge streams.
|
|
apiStreamPurgeT = "STREAM.PURGE.%s"
|
|
|
|
// apiStreamListT is the endpoint that will return all detailed stream information
|
|
apiStreamListT = "STREAM.LIST"
|
|
|
|
// apiMsgGetT is the endpoint to get a message.
|
|
apiMsgGetT = "STREAM.MSG.GET.%s"
|
|
|
|
// apiMsgDeleteT is the endpoint to remove a message.
|
|
apiMsgDeleteT = "STREAM.MSG.DELETE.%s"
|
|
)
|
|
|
|
func (js *jetStream) apiRequestJSON(ctx context.Context, subject string, resp interface{}, data ...[]byte) (*jetStreamMsg, error) {
|
|
jsMsg, err := js.apiRequest(ctx, subject, data...)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if err := json.Unmarshal(jsMsg.Data(), resp); err != nil {
|
|
return nil, err
|
|
}
|
|
return jsMsg, err
|
|
}
|
|
|
|
// a RequestWithContext with tracing via TraceCB
|
|
func (js *jetStream) apiRequest(ctx context.Context, subj string, data ...[]byte) (*jetStreamMsg, error) {
|
|
var req []byte
|
|
if len(data) > 0 {
|
|
req = data[0]
|
|
}
|
|
if js.clientTrace != nil {
|
|
ctrace := js.clientTrace
|
|
if ctrace.RequestSent != nil {
|
|
ctrace.RequestSent(subj, req)
|
|
}
|
|
}
|
|
resp, err := js.conn.RequestWithContext(ctx, subj, req)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if js.clientTrace != nil {
|
|
ctrace := js.clientTrace
|
|
if ctrace.ResponseReceived != nil {
|
|
ctrace.ResponseReceived(subj, resp.Data, resp.Header)
|
|
}
|
|
}
|
|
|
|
return js.toJSMsg(resp), nil
|
|
}
|
|
|
|
func apiSubj(prefix, subject string) string {
|
|
if prefix == "" {
|
|
return subject
|
|
}
|
|
var b strings.Builder
|
|
b.WriteString(prefix)
|
|
b.WriteString(subject)
|
|
return b.String()
|
|
}
|