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// Copyright 2019 Aporeto Inc.
// 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 maniphttp
import (
"crypto/tls"
"fmt"
"net/http"
"strings"
"go.aporeto.io/manipulate"
"go.aporeto.io/manipulate/internal/push"
)
type subscribeConfig struct {
namespace string
endpoint string
recursive bool
tlsConfig *tls.Config
}
func newSubscribeConfig(m *httpManipulator) subscribeConfig {
return subscribeConfig{
endpoint: "events",
namespace: m.namespace,
tlsConfig: m.tlsConfig,
}
}
// SubscriberOption represents option to NewSubscriber.
type SubscriberOption func(*subscribeConfig)
// SubscriberOptionRecursive makes the subscriber to listen
// to events in current namespace and all children.
func SubscriberOptionRecursive(recursive bool) SubscriberOption {
return func(cfg *subscribeConfig) {
cfg.recursive = recursive
}
}
// SubscriberOptionNamespace sets the namespace from where the subscription
// should start.
// By default it is the same as the manipulator.
func SubscriberOptionNamespace(namespace string) SubscriberOption {
return func(cfg *subscribeConfig) {
cfg.namespace = namespace
}
}
// SubscriberOptionEndpoint sets the endpint to connect to.
// By default it is /events.
func SubscriberOptionEndpoint(endpoint string) SubscriberOption {
return func(cfg *subscribeConfig) {
cfg.endpoint = strings.TrimRight(strings.TrimLeft(endpoint, "/"), "/")
}
}
// NewSubscriber returns a new subscription.
func NewSubscriber(manipulator manipulate.Manipulator, options ...SubscriberOption) manipulate.Subscriber {
m, ok := manipulator.(*httpManipulator)
if !ok {
panic("You must pass a HTTP manipulator to maniphttp.NewSubscriber or maniphttp.NewSubscriberWithEndpoint")
}
cfg := newSubscribeConfig(m)
for _, opt := range options {
if opt == nil {
panic("nil passed as subscriber option")
}
opt(&cfg)
}
return push.NewSubscriber(
fmt.Sprintf("%s/%s", m.url, cfg.endpoint),
cfg.namespace,
m.currentPassword(),
m.registerRenewNotifier,
m.unregisterRenewNotifier,
cfg.tlsConfig,
http.Header{
"Content-Type": []string{string(m.encoding)},
"Accept": []string{string(m.encoding)},
},
cfg.recursive,
)
}
// NewSubscriberWithEndpoint returns a new subscription connecting to specific endpoint.
func NewSubscriberWithEndpoint(manipulator manipulate.Manipulator, endpoint string, recursive bool) manipulate.Subscriber {
return NewSubscriber(manipulator, SubscriberOptionRecursive(recursive), SubscriberOptionEndpoint(endpoint))
}
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