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Add namespace delegation and priviledged entity example
This commit is contained in:
Mickael Remond
Mickaël Rémond
parent
715bf6976f
commit
9219bf5aa9
5
_examples/delegation/README.md
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5
_examples/delegation/README.md
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# Advanced component: delegation
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`delegation` is an example of advanced component supporting Namespace Delegation
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([XEP-0355](https://xmpp.org/extensions/xep-0355.html)) and privileged entity
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([XEP-356](https://xmpp.org/extensions/xep-0356.html)).
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227
_examples/delegation/delegation.go
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227
_examples/delegation/delegation.go
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package main
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import (
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"encoding/xml"
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"fmt"
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"log"
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"gosrc.io/xmpp"
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)
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func main() {
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opts := xmpp.ComponentOptions{
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Domain: "service.localhost",
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Secret: "mypass",
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Address: "localhost:9999",
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// TODO: Move that part to a component discovery handler
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Name: "Test Component",
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Category: "gateway",
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Type: "service",
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}
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router := xmpp.NewRouter()
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router.HandleFunc("message", HandleMessage)
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router.NewRoute().
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IQNamespaces(xmpp.NSDiscoInfo).
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HandlerFunc(func(s xmpp.Sender, p xmpp.Packet) {
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DiscoInfo(s, p, opts)
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})
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router.NewRoute().
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IQNamespaces("urn:xmpp:delegation:1").
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HandlerFunc(HandleDelegation)
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component, err := xmpp.NewComponent(opts, router)
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if err != nil {
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log.Fatalf("%+v", err)
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}
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// If you pass the component to a stream manager, it will handle the reconnect policy
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// for you automatically.
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// TODO: Post Connect could be a feature of the router or the client. Move it somewhere else.
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cm := xmpp.NewStreamManager(component, nil)
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log.Fatal(cm.Run())
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}
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func HandleMessage(_ xmpp.Sender, p xmpp.Packet) {
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msg, ok := p.(xmpp.Message)
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if !ok {
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return
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}
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var msgProcessed bool
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for _, ext := range msg.Extensions {
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delegation, ok := ext.(*xmpp.Delegation)
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if ok {
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msgProcessed = true
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fmt.Printf("Delegation confirmed for namespace %s\n", delegation.Delegated.Namespace)
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}
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}
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// TODO: Decode privilege message
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// <message to='service.localhost' from='localhost'><privilege xmlns='urn:xmpp:privilege:1'><perm type='outgoing' access='message'/><perm type='get' access='roster'/><perm type='managed_entity' access='presence'/></privilege></message>
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if !msgProcessed {
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fmt.Printf("Ignored received message, not related to delegation: %v\n", msg)
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}
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}
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const (
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pubsubNode = "urn:xmpp:delegation:1::http://jabber.org/protocol/pubsub"
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pepNode = "urn:xmpp:delegation:1:bare:http://jabber.org/protocol/pubsub"
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)
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// TODO: replace xmpp.Sender by ctx xmpp.Context ?
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// ctx.Stream.Send / SendRaw
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// ctx.Opts
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func DiscoInfo(c xmpp.Sender, p xmpp.Packet, opts xmpp.ComponentOptions) {
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// Type conversion & sanity checks
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iq, ok := p.(xmpp.IQ)
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if !ok {
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return
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}
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info, ok := iq.Payload[0].(*xmpp.DiscoInfo)
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if !ok {
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return
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}
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iqResp := xmpp.NewIQ("result", iq.To, iq.From, iq.Id, "en")
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switch info.Node {
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case "":
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DiscoInfoRoot(&iqResp, opts)
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case pubsubNode:
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DiscoInfoPubSub(&iqResp)
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case pepNode:
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DiscoInfoPEP(&iqResp)
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}
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_ = c.Send(iqResp)
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}
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func DiscoInfoRoot(iqResp *xmpp.IQ, opts xmpp.ComponentOptions) {
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// Higher level discovery
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identity := xmpp.Identity{
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Name: opts.Name,
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Category: opts.Category,
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Type: opts.Type,
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}
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payload := xmpp.DiscoInfo{
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XMLName: xml.Name{
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Space: xmpp.NSDiscoInfo,
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Local: "query",
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},
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Identity: identity,
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Features: []xmpp.Feature{
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{Var: xmpp.NSDiscoInfo},
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{Var: xmpp.NSDiscoItems},
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{Var: "jabber:iq:version"},
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{Var: "urn:xmpp:delegation:1"},
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},
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}
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iqResp.AddPayload(&payload)
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}
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func DiscoInfoPubSub(iqResp *xmpp.IQ) {
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payload := xmpp.DiscoInfo{
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XMLName: xml.Name{
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Space: xmpp.NSDiscoInfo,
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Local: "query",
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},
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Node: pubsubNode,
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Features: []xmpp.Feature{
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{Var: "http://jabber.org/protocol/pubsub"},
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{Var: "http://jabber.org/protocol/pubsub#publish"},
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{Var: "http://jabber.org/protocol/pubsub#subscribe"},
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{Var: "http://jabber.org/protocol/pubsub#publish-options"},
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},
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}
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iqResp.AddPayload(&payload)
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}
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func DiscoInfoPEP(iqResp *xmpp.IQ) {
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identity := xmpp.Identity{
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Category: "pubsub",
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Type: "pep",
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}
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payload := xmpp.DiscoInfo{
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XMLName: xml.Name{
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Space: xmpp.NSDiscoInfo,
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Local: "query",
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},
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Identity: identity,
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Node: pepNode,
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Features: []xmpp.Feature{
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{Var: "http://jabber.org/protocol/pubsub#access-presence"},
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{Var: "http://jabber.org/protocol/pubsub#auto-create"},
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{Var: "http://jabber.org/protocol/pubsub#auto-subscribe"},
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{Var: "http://jabber.org/protocol/pubsub#config-node"},
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{Var: "http://jabber.org/protocol/pubsub#create-and-configure"},
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{Var: "http://jabber.org/protocol/pubsub#create-nodes"},
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{Var: "http://jabber.org/protocol/pubsub#filtered-notifications"},
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{Var: "http://jabber.org/protocol/pubsub#persistent-items"},
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{Var: "http://jabber.org/protocol/pubsub#publish"},
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{Var: "http://jabber.org/protocol/pubsub#retrieve-items"},
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{Var: "http://jabber.org/protocol/pubsub#subscribe"},
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},
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}
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iqResp.AddPayload(&payload)
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}
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func HandleDelegation(s xmpp.Sender, p xmpp.Packet) {
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// Type conversion & sanity checks
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iq, ok := p.(xmpp.IQ)
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if !ok {
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return
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}
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payload1 := iq.Payload[0]
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delegation, ok := payload1.(*xmpp.Delegation)
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if !ok {
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return
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}
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forwardedPacket := delegation.Forwarded.Stanza
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fmt.Println(forwardedPacket)
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forwardedIQ, ok := forwardedPacket.(xmpp.IQ)
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if !ok {
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return
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}
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payload := forwardedIQ.Payload
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if len(payload) == 0 {
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return
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}
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pubsub, ok := payload[0].(*xmpp.PubSub)
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if !ok {
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// We only support pubsub delegation
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return
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}
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if pubsub.Publish.XMLName.Local == "publish" {
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// Prepare pubsub IQ reply
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iqResp := xmpp.NewIQ("result", forwardedIQ.To, forwardedIQ.From, forwardedIQ.Id, "en")
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payload := xmpp.PubSub{
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XMLName: xml.Name{
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Space: "http://jabber.org/protocol/pubsub",
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Local: "pubsub",
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},
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}
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iqResp.AddPayload(&payload)
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// Wrap the reply in delegation 'forward'
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iqForward := xmpp.NewIQ("result", iq.To, iq.From, iq.Id, "en")
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delegPayload := xmpp.Delegation{
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XMLName: xml.Name{
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Space: "urn:xmpp:delegation:1",
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Local: "delegation",
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},
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Forwarded: &xmpp.Forwarded{
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XMLName: xml.Name{
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Space: "urn:xmpp:forward:0",
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Local: "forward",
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},
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Stanza: iqResp,
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},
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}
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iqForward.AddPayload(&delegPayload)
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_ = s.Send(iqForward)
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// TODO: The component should actually broadcast the mood to subscribers
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}
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}
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