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Merge pull request #146 from remicorniere/PubSub_Example

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Pub sub example update
This commit is contained in:
remicorniere 2020-01-14 22:53:11 +00:00 committed by GitHub
commit 84665d8c13
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6 changed files with 187 additions and 36 deletions
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126
_examples/xmpp_pubsub_client/xmpp_ps_client.go
View File

@ -32,10 +32,10 @@ func main() {
router.NewRoute().Packet("message").
HandlerFunc(func(s xmpp.Sender, p stanza.Packet) {
data, _ := xml.Marshal(p)
fmt.Println("Received a publication ! => \n" + string(data))
log.Println("Received a message ! => \n" + string(data))
})
client, err := xmpp.NewClient(config, router, func(err error) { fmt.Println(err) })
client, err := xmpp.NewClient(config, router, func(err error) { log.Println(err) })
if err != nil {
log.Fatalf("%+v", err)
}
@ -49,11 +49,45 @@ func main() {
// ==========================
// Create a node
ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
createNode(ctx, cancel, client)
// =============================
// Configure the node. This can also be done in a single message with the creation
configureNode(ctx, cancel, client)
// ====================================
// Subscribe to this node :
subToNode(ctx, cancel, client)
// ==========================
// Publish to that node
pubToNode(ctx, cancel, client)
// =============================
// Let's purge the node :
purgeRq, _ := stanza.NewPurgeAllItems(serviceName, nodeName)
purgeCh, err := client.SendIQ(ctx, purgeRq)
select {
case purgeResp := <-purgeCh:
if purgeResp.Error != nil {
cancel()
log.Fatalf("error while purging node : %s", purgeResp.Error.Text)
}
log.Println("node successfully purged")
case <-time.After(1000 * time.Millisecond):
cancel()
log.Fatal("No iq response was received in time while purging node")
}
cancel()
}
func createNode(ctx context.Context, cancel context.CancelFunc, client *xmpp.Client) {
rqCreate, err := stanza.NewCreateNode(serviceName, nodeName)
if err != nil {
log.Fatalf("%+v", err)
}
ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
createCh, err := client.SendIQ(ctx, rqCreate)
if err != nil {
log.Fatalf("%+v", err)
@ -67,20 +101,73 @@ func main() {
if respCr.Error.Reason != "conflict" {
log.Fatalf("%+v", respCr.Error.Text)
}
fmt.Println(respCr.Error.Text)
log.Println(respCr.Error.Text)
} else {
fmt.Print("successfully created channel")
}
case <-time.After(100 * time.Millisecond):
cancel()
log.Fatal("No iq response was received in time")
log.Fatal("No iq response was received in time while creating node")
}
}
}
}
// ====================================
// Now let's subscribe to this node :
rqSubscribe, _ := stanza.NewSubRq(serviceName, stanza.SubInfo{
func configureNode(ctx context.Context, cancel context.CancelFunc, client *xmpp.Client) {
// First, ask for a form with the config options
confRq, _ := stanza.NewConfigureNode(serviceName, nodeName)
confReqCh, err := client.SendIQ(ctx, confRq)
if err != nil {
log.Fatalf("could not send iq : %v", err)
}
select {
case confForm := <-confReqCh:
// If the request was successful, we now have a form with configuration options to update
fields, err := confForm.GetFormFields()
if err != nil {
log.Fatal("No config fields found !")
}
// These are some common fields expected to be present. Change processing to your liking
if fields["pubsub#max_payload_size"] != nil {
fields["pubsub#max_payload_size"].ValuesList[0] = "100000"
}
if fields["pubsub#notification_type"] != nil {
fields["pubsub#notification_type"].ValuesList[0] = "headline"
}
// Send the modified fields as a form
submitConf, err := stanza.NewFormSubmissionOwner(serviceName,
nodeName,
[]*stanza.Field{
fields["pubsub#max_payload_size"],
fields["pubsub#notification_type"],
})
c, _ := client.SendIQ(ctx, submitConf)
select {
case confResp := <-c:
if confResp.Error != nil {
cancel()
log.Fatalf("node configuration failed : %s", confResp.Error.Text)
}
log.Println("node configuration was successful")
return
case <-time.After(300 * time.Millisecond):
cancel()
log.Fatal("No iq response was received in time while configuring the node")
}
case <-time.After(300 * time.Millisecond):
cancel()
log.Fatal("No iq response was received in time while asking for the config form")
}
}
func subToNode(ctx context.Context, cancel context.CancelFunc, client *xmpp.Client) {
rqSubscribe, err := stanza.NewSubRq(serviceName, stanza.SubInfo{
Node: nodeName,
Jid: userJID,
})
@ -91,15 +178,15 @@ func main() {
if subRespCh != nil {
select {
case <-subRespCh:
fmt.Println("Subscribed to the service")
case <-time.After(100 * time.Millisecond):
log.Println("Subscribed to the service")
case <-time.After(300 * time.Millisecond):
cancel()
log.Fatal("No iq response was received in time")
log.Fatal("No iq response was received in time while subscribing")
}
}
}
// ==========================
// Publish to that node
func pubToNode(ctx context.Context, cancel context.CancelFunc, client *xmpp.Client) {
pub, err := stanza.NewPublishItemRq(serviceName, nodeName, "", stanza.Item{
Publisher: "testuser2",
Any: &stanza.Node{
@ -166,17 +253,10 @@ func main() {
if pubRespCh != nil {
select {
case <-pubRespCh:
fmt.Println("Published item to the service")
case <-time.After(100 * time.Millisecond):
log.Println("Published item to the service")
case <-time.After(300 * time.Millisecond):
cancel()
log.Fatal("No iq response was received in time")
log.Fatal("No iq response was received in time while publishing")
}
}
// =============================
// Let's purge the node now :
purgeRq, _ := stanza.NewPurgeAllItems(serviceName, nodeName)
client.SendIQ(ctx, purgeRq)
cancel()
}

4
stanza/form.go
View File

@ -17,7 +17,7 @@ type Form struct {
XMLName xml.Name `xml:"jabber:x:data x"`
Instructions []string `xml:"instructions"`
Title string `xml:"title,omitempty"`
Fields []Field `xml:"field,omitempty"`
Fields []*Field `xml:"field,omitempty"`
Reported *FormItem `xml:"reported"`
Items []FormItem
Type string `xml:"type,attr"`
@ -38,7 +38,7 @@ type Field struct {
Label string `xml:"label,attr,omitempty"`
}
func NewForm(fields []Field, formType string) *Form {
func NewForm(fields []*Field, formType string) *Form {
return &Form{
Type: formType,
Fields: fields,

2
stanza/form_test.go
View File

@ -57,7 +57,7 @@ func TestMarshalFormSubmit(t *testing.T) {
Node: serviceNode,
Form: &Form{
Type: FormTypeSubmit,
Fields: []Field{
Fields: []*Field{
{Var: "FORM_TYPE", Type: FieldTypeHidden, ValuesList: []string{"http://jabber.org/protocol/pubsub#node_config"}},
{Var: "pubsub#title", ValuesList: []string{"Princely Musings (Atom)"}},
{Var: "pubsub#deliver_notifications", ValuesList: []string{"1"}},

31
stanza/pubsub_owner.go
View File

@ -198,7 +198,7 @@ func NewApprovePendingSubRequest(serviceId, sessionId, nodeId string) (IQ, error
form := &Form{
Type: FormTypeSubmit,
Fields: []Field{{Var: "pubsub#node", ValuesList: []string{nodeId}}},
Fields: []*Field{{Var: "pubsub#node", ValuesList: []string{nodeId}}},
}
data, err := xml.Marshal(form)
if err != nil {
@ -262,25 +262,44 @@ func NewAffiliationListRequest(serviceId, nodeID string) (IQ, error) {
return iq, nil
}
// NewFormSubmission builds a form submission pubsub IQ, in the Owner namespace
// This is typically used to respond to a form issued by the server when configuring a node.
// See 8.2.4 Form Submission
func NewFormSubmissionOwner(serviceId, nodeName string, fields []*Field) (IQ, error) {
if serviceId == "" || nodeName == "" {
return IQ{}, errors.New("serviceId and nodeName must be filled for this request to be valid")
}
submitConf := NewIQ(Attrs{Type: IQTypeSet, To: serviceId})
submitConf.Payload = &PubSubOwner{
OwnerUseCase: &ConfigureOwner{
Node: nodeName,
Form: NewForm(fields,
FormTypeSubmit)},
}
return submitConf, nil
}
// GetFormFields gets the fields from a form in a IQ stanza of type result, as a map.
// Key is the "var" attribute of the field, and field is the value.
// The user can then select and modify the fields they want to alter, and submit a new form to the service using the
// NewFormSubmission function to build the IQ.
// TODO : remove restriction on IQ type ?
func (iq *IQ) GetFormFields() (map[string]Field, error) {
func (iq *IQ) GetFormFields() (map[string]*Field, error) {
if iq.Type != IQTypeResult {
return nil, errors.New("this IQ is not a result type IQ. Cannot extract the form from it")
}
switch payload := iq.Payload.(type) {
// We support IOT Control IQ
case *PubSubGeneric:
fieldMap := make(map[string]Field)
fieldMap := make(map[string]*Field)
for _, elt := range payload.Configure.Form.Fields {
fieldMap[elt.Var] = elt
}
return fieldMap, nil
case *PubSubOwner:
fieldMap := make(map[string]Field)
fieldMap := make(map[string]*Field)
co, ok := payload.OwnerUseCase.(*ConfigureOwner)
if !ok {
return nil, errors.New("this IQ does not contain a PubSub payload with a configure tag for the owner namespace")
@ -291,7 +310,7 @@ func (iq *IQ) GetFormFields() (map[string]Field, error) {
return fieldMap, nil
default:
if iq.Any != nil {
fieldMap := make(map[string]Field)
fieldMap := make(map[string]*Field)
if iq.Any.XMLName.Local != "command" {
return nil, errors.New("this IQ does not contain a form")
}
@ -307,7 +326,7 @@ func (iq *IQ) GetFormFields() (map[string]Field, error) {
}
err = xml.Unmarshal(data, &f)
if err == nil {
fieldMap[f.Var] = f
fieldMap[f.Var] = &f
}
}
}

56
stanza/pubsub_owner_test.go
View File

@ -357,7 +357,7 @@ func TestNewApproveSubRequest(t *testing.T) {
apprForm := &stanza.Form{
Type: stanza.FormTypeSubmit,
Fields: []stanza.Field{
Fields: []*stanza.Field{
{Var: "FORM_TYPE", Type: stanza.FieldTypeHidden, ValuesList: []string{"http://jabber.org/protocol/pubsub#subscribe_authorization"}},
{Var: "pubsub#subid", ValuesList: []string{"123-abc"}},
{Var: "pubsub#node", ValuesList: []string{"princely_musings"}},
@ -381,7 +381,7 @@ func TestNewApproveSubRequest(t *testing.T) {
for _, f := range frm.Fields {
if f.Var == "pubsub#allow" {
allowField = &f
allowField = f
}
}
if allowField == nil || allowField.ValuesList[0] != "true" {
@ -816,6 +816,58 @@ func TestGetFormFieldsCmd(t *testing.T) {
}
func TestNewFormSubmissionOwner(t *testing.T) {
expectedReq := "<iq type=\"set\" id=\"config2\" to=\"pubsub.shakespeare.lit\">" +
"<pubsub xmlns=\"http://jabber.org/protocol/pubsub#owner\"> <configure node=\"princely_musings\"> " +
"<x xmlns=\"jabber:x:data\" type=\"submit\" > <field var=\"FORM_TYPE\" type=\"hidden\"> " +
"<value>http://jabber.org/protocol/pubsub#node_config</value> </field> <field var=\"pubsub#item_expire\"> " +
"<value>604800</value> </field> <field var=\"pubsub#access_model\"> <value>roster</value> </field> " +
"<field var=\"pubsub#roster_groups_allowed\"> <value>friends</value> <value>servants</value> " +
"<value>courtiers</value> </field> </x> </configure> </pubsub> </iq>"
subR, err := stanza.NewFormSubmissionOwner("pubsub.shakespeare.lit",
"princely_musings",
[]*stanza.Field{
{Var: "FORM_TYPE", Type: stanza.FieldTypeHidden, ValuesList: []string{"http://jabber.org/protocol/pubsub#node_config"}},
{Var: "pubsub#item_expire", ValuesList: []string{"604800"}},
{Var: "pubsub#access_model", ValuesList: []string{"roster"}},
{Var: "pubsub#roster_groups_allowed", ValuesList: []string{"friends", "servants", "courtiers"}},
})
subR.Id = "config2"
if err != nil {
t.Fatalf("Could not create request : %s", err)
}
if _, e := checkMarshalling(t, subR); e != nil {
t.Fatalf("Failed to check marshalling for generated sub request : %s", e)
}
pubsub, ok := subR.Payload.(*stanza.PubSubOwner)
if !ok {
t.Fatalf("payload is not a pubsub in namespace owner !")
}
conf, ok := pubsub.OwnerUseCase.(*stanza.ConfigureOwner)
if !ok {
t.Fatalf("pubsub does not contain a configure node !")
}
if conf.Form == nil {
t.Fatalf("the form is absent from the configuration submission !")
}
if len(conf.Form.Fields) != 4 {
t.Fatalf("expected 4 fields, found %d", len(conf.Form.Fields))
}
if len(conf.Form.Fields[3].ValuesList) != 3 {
t.Fatalf("expected 3 values in fourth field, found %d", len(conf.Form.Fields[3].ValuesList))
}
data, err := xml.Marshal(subR)
if err := compareMarshal(expectedReq, string(data)); err != nil {
t.Fatalf(err.Error())
}
}
func getPubSubOwnerPayload(response string) (*stanza.PubSubOwner, error) {
var respIQ stanza.IQ
err := xml.Unmarshal([]byte(response), &respIQ)

4
stanza/pubsub_test.go
View File

@ -8,7 +8,7 @@ import (
"testing"
)
var submitFormExample = stanza.NewForm([]stanza.Field{
var submitFormExample = stanza.NewForm([]*stanza.Field{
{Var: "FORM_TYPE", Type: stanza.FieldTypeHidden, ValuesList: []string{"http://jabber.org/protocol/pubsub#node_config"}},
{Var: "pubsub#title", ValuesList: []string{"Princely Musings (Atom)"}},
{Var: "pubsub#deliver_notifications", ValuesList: []string{"1"}},
@ -741,7 +741,7 @@ func TestNewCreateAndConfigNode(t *testing.T) {
"princely_musings",
&stanza.Form{
Type: stanza.FormTypeSubmit,
Fields: []stanza.Field{
Fields: []*stanza.Field{
{Var: "FORM_TYPE", Type: stanza.FieldTypeHidden, ValuesList: []string{"http://jabber.org/protocol/pubsub#node_config"}},
{Var: "pubsub#notify_retract", ValuesList: []string{"0"}},
{Var: "pubsub#notify_sub", ValuesList: []string{"0"}},