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Added callback to process errors after connection.

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Added tests and refactored a bit.
This commit is contained in:
CORNIERE Rémi 2019-12-05 18:12:00 +01:00
parent b74c0f0374
commit e675e65a59
10 changed files with 792 additions and 332 deletions
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95
_examples/xmpp_chat_client/xmpp_chat_client.go Normal file
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@ -0,0 +1,95 @@
package main
/*
xmpp_chat_client is a demo client that connect on an XMPP server to chat with other members
Note that this example sends to a very specific user. User logic is not implemented here.
*/
import (
. "bufio"
"fmt"
"os"
"gosrc.io/xmpp"
"gosrc.io/xmpp/stanza"
)
const (
currentUserAddress = "localhost:5222"
currentUserJid = "testuser@localhost"
currentUserPass = "testpass"
correspondantJid = "testuser2@localhost"
)
func main() {
config := xmpp.Config{
TransportConfiguration: xmpp.TransportConfiguration{
Address: currentUserAddress,
},
Jid: currentUserJid,
Credential: xmpp.Password(currentUserPass),
Insecure: true}
var client *xmpp.Client
var err error
router := xmpp.NewRouter()
router.HandleFunc("message", handleMessage)
if client, err = xmpp.NewClient(config, router, errorHandler); err != nil {
fmt.Println("Error new client")
}
// Connecting client and handling messages
// To use a stream manager, just write something like this instead :
//cm := xmpp.NewStreamManager(client, startMessaging)
//log.Fatal(cm.Run()) //=> this will lock the calling goroutine
if err = client.Connect(); err != nil {
fmt.Printf("XMPP connection failed: %s", err)
return
}
startMessaging(client)
}
func startMessaging(client xmpp.Sender) {
reader := NewReader(os.Stdin)
textChan := make(chan string)
var text string
for {
fmt.Print("Enter text: ")
go readInput(reader, textChan)
select {
case <-killChan:
return
case text = <-textChan:
reply := stanza.Message{Attrs: stanza.Attrs{To: correspondantJid}, Body: text}
err := client.Send(reply)
if err != nil {
fmt.Printf("There was a problem sending the message : %v", reply)
return
}
}
}
}
func readInput(reader *Reader, textChan chan string) {
text, _ := reader.ReadString('\n')
textChan <- text
}
var killChan = make(chan struct{})
// If an error occurs, this is used
func errorHandler(err error) {
fmt.Printf("%v", err)
killChan <- struct{}{}
}
func handleMessage(s xmpp.Sender, p stanza.Packet) {
msg, ok := p.(stanza.Message)
if !ok {
_, _ = fmt.Fprintf(os.Stdout, "Ignoring packet: %T\n", p)
return
}
_, _ = fmt.Fprintf(os.Stdout, "Body = %s - from = %s\n", msg.Body, msg.From)
}

6
_examples/xmpp_component/xmpp_component.go
View File

@ -35,7 +35,7 @@ func main() {
IQNamespaces("jabber:iq:version").
HandlerFunc(handleVersion)
component, err := xmpp.NewComponent(opts, router)
component, err := xmpp.NewComponent(opts, router, handleError)
if err != nil {
log.Fatalf("%+v", err)
}
@ -47,6 +47,10 @@ func main() {
log.Fatal(cm.Run())
}
func handleError(err error) {
fmt.Println(err.Error())
}
func handleMessage(_ xmpp.Sender, p stanza.Packet) {
msg, ok := p.(stanza.Message)
if !ok {

5
_examples/xmpp_jukebox/xmpp_jukebox.go
View File

@ -53,7 +53,7 @@ func main() {
handleIQ(s, p, player)
})
client, err := xmpp.NewClient(config, router)
client, err := xmpp.NewClient(config, router, errorHandler)
if err != nil {
log.Fatalf("%+v", err)
}
@ -61,6 +61,9 @@ func main() {
cm := xmpp.NewStreamManager(client, nil)
log.Fatal(cm.Run())
}
func errorHandler(err error) {
fmt.Println(err.Error())
}
func handleMessage(s xmpp.Sender, p stanza.Packet, player *mpg123.Player) {
msg, ok := p.(stanza.Message)

6
_examples/xmpp_oauth2/xmpp_oauth2.go
View File

@ -28,7 +28,7 @@ func main() {
router := xmpp.NewRouter()
router.HandleFunc("message", handleMessage)
client, err := xmpp.NewClient(config, router)
client, err := xmpp.NewClient(config, router, errorHandler)
if err != nil {
log.Fatalf("%+v", err)
}
@ -39,6 +39,10 @@ func main() {
log.Fatal(cm.Run())
}
func errorHandler(err error) {
fmt.Println(err.Error())
}
func handleMessage(s xmpp.Sender, p stanza.Packet) {
msg, ok := p.(stanza.Message)
if !ok {

6
_examples/xmpp_websocket/xmpp_websocket.go
View File

@ -26,7 +26,7 @@ func main() {
router := xmpp.NewRouter()
router.HandleFunc("message", handleMessage)
client, err := xmpp.NewClient(config, router)
client, err := xmpp.NewClient(config, router, errorHandler)
if err != nil {
log.Fatalf("%+v", err)
}
@ -37,6 +37,10 @@ func main() {
log.Fatal(cm.Run())
}
func errorHandler(err error) {
fmt.Println(err.Error())
}
func handleMessage(s xmpp.Sender, p stanza.Packet) {
msg, ok := p.(stanza.Message)
if !ok {

18
client.go
View File

@ -98,6 +98,8 @@ type Client struct {
router *Router
// Track and broadcast connection state
EventManager
// Handle errors from client execution
ErrorHandler func(error)
}
/*
@ -107,7 +109,7 @@ Setting up the client / Checking the parameters
// NewClient generates a new XMPP client, based on Config passed as parameters.
// If host is not specified, the DNS SRV should be used to find the host from the domainpart of the JID.
// Default the port to 5222.
func NewClient(config Config, r *Router) (c *Client, err error) {
func NewClient(config Config, r *Router, errorHandler func(error)) (c *Client, err error) {
if config.KeepaliveInterval == 0 {
config.KeepaliveInterval = time.Second * 30
}
@ -143,6 +145,7 @@ func NewClient(config Config, r *Router) (c *Client, err error) {
c = new(Client)
c.config = config
c.router = r
c.ErrorHandler = errorHandler
if c.config.ConnectTimeout == 0 {
c.config.ConnectTimeout = 15 // 15 second as default
@ -191,10 +194,7 @@ func (c *Client) Resume(state SMState) error {
go keepalive(c.transport, c.config.KeepaliveInterval, keepaliveQuit)
// Start the receiver go routine
state = c.Session.SMState
// Leaving this channel here for later. Not used atm. We should return this instead of an error because right
// now the returned error is lost in limbo.
errChan := make(chan error)
go c.recv(state, keepaliveQuit, errChan)
go c.recv(state, keepaliveQuit)
// We're connected and can now receive and send messages.
//fmt.Fprintf(client.conn, "<presence xml:lang='en'><show>%s</show><status>%s</status></presence>", "chat", "Online")
@ -273,11 +273,11 @@ func (c *Client) sendWithWriter(writer io.Writer, packet []byte) error {
// Go routines
// Loop: Receive data from server
func (c *Client) recv(state SMState, keepaliveQuit chan<- struct{}, errChan chan<- error) {
func (c *Client) recv(state SMState, keepaliveQuit chan<- struct{}) {
for {
val, err := stanza.NextPacket(c.transport.GetDecoder())
if err != nil {
errChan <- err
c.ErrorHandler(err)
close(keepaliveQuit)
c.disconnected(state)
return
@ -289,7 +289,7 @@ func (c *Client) recv(state SMState, keepaliveQuit chan<- struct{}, errChan chan
c.router.route(c, val)
close(keepaliveQuit)
c.streamError(packet.Error.Local, packet.Text)
errChan <- errors.New("stream error: " + packet.Error.Local)
c.ErrorHandler(errors.New("stream error: " + packet.Error.Local))
return
// Process Stream management nonzas
case stanza.SMRequest:
@ -299,7 +299,7 @@ func (c *Client) recv(state SMState, keepaliveQuit chan<- struct{}, errChan chan
}, H: state.Inbound}
err = c.Send(answer)
if err != nil {
errChan <- err
c.ErrorHandler(err)
return
}
default:

368
client_test.go
View File

@ -1,6 +1,7 @@
package xmpp
import (
"context"
"encoding/xml"
"errors"
"fmt"
@ -15,8 +16,7 @@ const (
// Default port is not standard XMPP port to avoid interfering
// with local running XMPP server
testXMPPAddress = "localhost:15222"
defaultTimeout = 2 * time.Second
testClientDomain = "localhost"
)
func TestEventManager(t *testing.T) {
@ -40,7 +40,7 @@ func TestEventManager(t *testing.T) {
func TestClient_Connect(t *testing.T) {
// Setup Mock server
mock := ServerMock{}
mock.Start(t, testXMPPAddress, handlerConnectSuccess)
mock.Start(t, testXMPPAddress, handlerClientConnectSuccess)
// Test / Check result
config := Config{
@ -54,7 +54,7 @@ func TestClient_Connect(t *testing.T) {
var client *Client
var err error
router := NewRouter()
if client, err = NewClient(config, router); err != nil {
if client, err = NewClient(config, router, clientDefaultErrorHandler); err != nil {
t.Errorf("connect create XMPP client: %s", err)
}
@ -82,7 +82,7 @@ func TestClient_NoInsecure(t *testing.T) {
var client *Client
var err error
router := NewRouter()
if client, err = NewClient(config, router); err != nil {
if client, err = NewClient(config, router, clientDefaultErrorHandler); err != nil {
t.Errorf("cannot create XMPP client: %s", err)
}
@ -112,7 +112,7 @@ func TestClient_FeaturesTracking(t *testing.T) {
var client *Client
var err error
router := NewRouter()
if client, err = NewClient(config, router); err != nil {
if client, err = NewClient(config, router, clientDefaultErrorHandler); err != nil {
t.Errorf("cannot create XMPP client: %s", err)
}
@ -127,7 +127,7 @@ func TestClient_FeaturesTracking(t *testing.T) {
func TestClient_RFC3921Session(t *testing.T) {
// Setup Mock server
mock := ServerMock{}
mock.Start(t, testXMPPAddress, handlerConnectWithSession)
mock.Start(t, testXMPPAddress, handlerClientConnectWithSession)
// Test / Check result
config := Config{
@ -142,7 +142,7 @@ func TestClient_RFC3921Session(t *testing.T) {
var client *Client
var err error
router := NewRouter()
if client, err = NewClient(config, router); err != nil {
if client, err = NewClient(config, router, clientDefaultErrorHandler); err != nil {
t.Errorf("connect create XMPP client: %s", err)
}
@ -153,21 +153,227 @@ func TestClient_RFC3921Session(t *testing.T) {
mock.Stop()
}
// Testing sending an IQ to the mock server and reading its response.
func TestClient_SendIQ(t *testing.T) {
done := make(chan struct{})
// Handler for Mock server
h := func(t *testing.T, c net.Conn) {
handlerClientConnectSuccess(t, c)
discardPresence(t, c)
respondToIQ(t, c)
done <- struct{}{}
}
client, mock := mockClientConnection(t, h, testClientIqPort)
ctx, _ := context.WithTimeout(context.Background(), 30*time.Second)
iqReq := stanza.NewIQ(stanza.Attrs{Type: stanza.IQTypeGet, From: "test1@localhost/mremond-mbp", To: defaultServerName, Id: defaultStreamID, Lang: "en"})
disco := iqReq.DiscoInfo()
iqReq.Payload = disco
// Handle a possible error
errChan := make(chan error)
errorHandler := func(err error) {
errChan <- err
}
client.ErrorHandler = errorHandler
res, err := client.SendIQ(ctx, iqReq)
if err != nil {
t.Errorf(err.Error())
}
select {
case <-res: // If the server responds with an IQ, we pass the test
case err := <-errChan: // If the server sends an error, or there is a connection error
t.Errorf(err.Error())
case <-time.After(defaultChannelTimeout): // If we timeout
t.Errorf("Failed to receive response, to sent IQ, from mock server")
}
select {
case <-done:
mock.Stop()
case <-time.After(defaultChannelTimeout):
t.Errorf("The mock server failed to finish its job !")
}
}
func TestClient_SendIQFail(t *testing.T) {
done := make(chan struct{})
// Handler for Mock server
h := func(t *testing.T, c net.Conn) {
handlerClientConnectSuccess(t, c)
discardPresence(t, c)
respondToIQ(t, c)
done <- struct{}{}
}
client, mock := mockClientConnection(t, h, testClientIqFailPort)
//==================
// Create an IQ to send
ctx, _ := context.WithTimeout(context.Background(), 30*time.Second)
iqReq := stanza.NewIQ(stanza.Attrs{Type: stanza.IQTypeGet, From: "test1@localhost/mremond-mbp", To: defaultServerName, Id: defaultStreamID, Lang: "en"})
disco := iqReq.DiscoInfo()
iqReq.Payload = disco
// Removing the id to make the stanza invalid. The IQ constructor makes a random one if none is specified
// so we need to overwrite it.
iqReq.Id = ""
// Handle a possible error
errChan := make(chan error)
errorHandler := func(err error) {
errChan <- err
}
client.ErrorHandler = errorHandler
res, _ := client.SendIQ(ctx, iqReq)
// Test
select {
case <-res: // If the server responds with an IQ
t.Errorf("Server should not respond with an IQ since the request is expected to be invalid !")
case <-errChan: // If the server sends an error, the test passes
case <-time.After(defaultChannelTimeout): // If we timeout
t.Errorf("Failed to receive response, to sent IQ, from mock server")
}
select {
case <-done:
mock.Stop()
case <-time.After(defaultChannelTimeout):
t.Errorf("The mock server failed to finish its job !")
}
}
func TestClient_SendRaw(t *testing.T) {
done := make(chan struct{})
// Handler for Mock server
h := func(t *testing.T, c net.Conn) {
handlerClientConnectSuccess(t, c)
discardPresence(t, c)
respondToIQ(t, c)
done <- struct{}{}
}
type testCase struct {
req string
shouldErr bool
port int
}
testRequests := make(map[string]testCase)
// Sending a correct IQ of type get. Not supposed to err
testRequests["Correct IQ"] = testCase{
req: `<iq type="get" id="91bd0bba-012f-4d92-bb17-5fc41e6fe545" from="test1@localhost/mremond-mbp" to="testServer" lang="en"><query xmlns="http://jabber.org/protocol/disco#info"></query></iq>`,
shouldErr: false,
port: testClientRawPort + 100,
}
// Sending an IQ with a missing ID. Should err
testRequests["IQ with missing ID"] = testCase{
req: `<iq type="get" from="test1@localhost/mremond-mbp" to="testServer" lang="en"><query xmlns="http://jabber.org/protocol/disco#info"></query></iq>`,
shouldErr: true,
port: testClientRawPort,
}
// A handler for the client.
// In the failing test, the server returns a stream error, which triggers this handler, client side.
errChan := make(chan error)
errHandler := func(err error) {
errChan <- err
}
// Tests for all the IQs
for name, tcase := range testRequests {
t.Run(name, func(st *testing.T) {
//Connecting to a mock server, initialized with given port and handler function
c, m := mockClientConnection(t, h, tcase.port)
c.ErrorHandler = errHandler
// Sending raw xml from test case
err := c.SendRaw(tcase.req)
if err != nil {
t.Errorf("Error sending Raw string")
}
// Just wait a little so the message has time to arrive
select {
// We don't use the default "long" timeout here because waiting it out means passing the test.
case <-time.After(100 * time.Millisecond):
case err = <-errChan:
if err == nil && tcase.shouldErr {
t.Errorf("Failed to get closing stream err")
} else if err != nil && !tcase.shouldErr {
t.Errorf("This test is not supposed to err !")
}
}
c.transport.Close()
select {
case <-done:
m.Stop()
case <-time.After(defaultChannelTimeout):
t.Errorf("The mock server failed to finish its job !")
}
})
}
}
func TestClient_Disconnect(t *testing.T) {
c, m := mockClientConnection(t, handlerClientConnectSuccess, testClientBasePort)
err := c.transport.Ping()
if err != nil {
t.Errorf("Could not ping but not disconnected yet")
}
c.Disconnect()
err = c.transport.Ping()
if err == nil {
t.Errorf("Did not disconnect properly")
}
m.Stop()
}
func TestClient_DisconnectStreamManager(t *testing.T) {
// Init mock server
// Setup Mock server
mock := ServerMock{}
mock.Start(t, testXMPPAddress, handlerAbortTLS)
// Test / Check result
config := Config{
TransportConfiguration: TransportConfiguration{
Address: testXMPPAddress,
},
Jid: "test@localhost",
Credential: Password("test"),
}
var client *Client
var err error
router := NewRouter()
if client, err = NewClient(config, router, clientDefaultErrorHandler); err != nil {
t.Errorf("cannot create XMPP client: %s", err)
}
sman := NewStreamManager(client, nil)
errChan := make(chan error)
runSMan := func(errChan chan error) {
errChan <- sman.Run()
}
go runSMan(errChan)
select {
case <-errChan:
case <-time.After(defaultChannelTimeout):
// When insecure is not allowed:
t.Errorf("should fail as insecure connection is not allowed and server does not support TLS")
}
mock.Stop()
}
//=============================================================================
// Basic XMPP Server Mock Handlers.
const serverStreamOpen = "<?xml version='1.0'?><stream:stream to='%s' id='%s' xmlns='%s' xmlns:stream='%s' version='1.0'>"
// Test connection with a basic straightforward workflow
func handlerConnectSuccess(t *testing.T, c net.Conn) {
func handlerClientConnectSuccess(t *testing.T, c net.Conn) {
decoder := xml.NewDecoder(c)
checkOpenStream(t, c, decoder)
checkClientOpenStream(t, c, decoder)
sendStreamFeatures(t, c, decoder) // Send initial features
readAuth(t, decoder)
fmt.Fprintln(c, "<success xmlns=\"urn:ietf:params:xml:ns:xmpp-sasl\"/>")
checkOpenStream(t, c, decoder) // Reset stream
checkClientOpenStream(t, c, decoder) // Reset stream
sendBindFeature(t, c, decoder) // Send post auth features
bind(t, c, decoder)
}
@ -175,26 +381,26 @@ func handlerConnectSuccess(t *testing.T, c net.Conn) {
// We expect client will abort on TLS
func handlerAbortTLS(t *testing.T, c net.Conn) {
decoder := xml.NewDecoder(c)
checkOpenStream(t, c, decoder)
checkClientOpenStream(t, c, decoder)
sendStreamFeatures(t, c, decoder) // Send initial features
}
// Test connection with mandatory session (RFC-3921)
func handlerConnectWithSession(t *testing.T, c net.Conn) {
func handlerClientConnectWithSession(t *testing.T, c net.Conn) {
decoder := xml.NewDecoder(c)
checkOpenStream(t, c, decoder)
checkClientOpenStream(t, c, decoder)
sendStreamFeatures(t, c, decoder) // Send initial features
readAuth(t, decoder)
fmt.Fprintln(c, "<success xmlns=\"urn:ietf:params:xml:ns:xmpp-sasl\"/>")
checkOpenStream(t, c, decoder) // Reset stream
checkClientOpenStream(t, c, decoder) // Reset stream
sendRFC3921Feature(t, c, decoder) // Send post auth features
bind(t, c, decoder)
session(t, c, decoder)
}
func checkOpenStream(t *testing.T, c net.Conn, decoder *xml.Decoder) {
func checkClientOpenStream(t *testing.T, c net.Conn, decoder *xml.Decoder) {
c.SetDeadline(time.Now().Add(defaultTimeout))
defer c.SetDeadline(time.Time{})
@ -220,105 +426,35 @@ func checkOpenStream(t *testing.T, c net.Conn, decoder *xml.Decoder) {
}
}
func sendStreamFeatures(t *testing.T, c net.Conn, _ *xml.Decoder) {
// This is a basic server, supporting only 1 stream feature: SASL Plain Auth
features := `<stream:features>
<mechanisms xmlns="urn:ietf:params:xml:ns:xmpp-sasl">
<mechanism>PLAIN</mechanism>
</mechanisms>
</stream:features>`
if _, err := fmt.Fprintln(c, features); err != nil {
t.Errorf("cannot send stream feature: %s", err)
func mockClientConnection(t *testing.T, serverHandler func(*testing.T, net.Conn), port int) (*Client, ServerMock) {
mock := ServerMock{}
testServerAddress := fmt.Sprintf("%s:%d", testClientDomain, port)
mock.Start(t, testServerAddress, serverHandler)
config := Config{
TransportConfiguration: TransportConfiguration{
Address: testServerAddress,
},
Jid: "test@localhost",
Credential: Password("test"),
Insecure: true}
var client *Client
var err error
router := NewRouter()
if client, err = NewClient(config, router, clientDefaultErrorHandler); err != nil {
t.Errorf("connect create XMPP client: %s", err)
}
if err = client.Connect(); err != nil {
t.Errorf("XMPP connection failed: %s", err)
}
return client, mock
}
// TODO return err in case of error reading the auth params
func readAuth(t *testing.T, decoder *xml.Decoder) string {
se, err := stanza.NextStart(decoder)
if err != nil {
t.Errorf("cannot read auth: %s", err)
return ""
}
var nv interface{}
nv = &stanza.SASLAuth{}
// Decode element into pointer storage
if err = decoder.DecodeElement(nv, &se); err != nil {
t.Errorf("cannot decode auth: %s", err)
return ""
}
switch v := nv.(type) {
case *stanza.SASLAuth:
return v.Value
}
return ""
}
func sendBindFeature(t *testing.T, c net.Conn, _ *xml.Decoder) {
// This is a basic server, supporting only 1 stream feature after auth: resource binding
features := `<stream:features>
<bind xmlns='urn:ietf:params:xml:ns:xmpp-bind'/>
</stream:features>`
if _, err := fmt.Fprintln(c, features); err != nil {
t.Errorf("cannot send stream feature: %s", err)
}
}
func sendRFC3921Feature(t *testing.T, c net.Conn, _ *xml.Decoder) {
// This is a basic server, supporting only 2 features after auth: resource & session binding
features := `<stream:features>
<bind xmlns='urn:ietf:params:xml:ns:xmpp-bind'/>
<session xmlns='urn:ietf:params:xml:ns:xmpp-session'/>
</stream:features>`
if _, err := fmt.Fprintln(c, features); err != nil {
t.Errorf("cannot send stream feature: %s", err)
}
}
func bind(t *testing.T, c net.Conn, decoder *xml.Decoder) {
se, err := stanza.NextStart(decoder)
if err != nil {
t.Errorf("cannot read bind: %s", err)
return
}
iq := &stanza.IQ{}
// Decode element into pointer storage
if err = decoder.DecodeElement(&iq, &se); err != nil {
t.Errorf("cannot decode bind iq: %s", err)
return
}
// TODO Check all elements
switch iq.Payload.(type) {
case *stanza.Bind:
result := `<iq id='%s' type='result'>
<bind xmlns='urn:ietf:params:xml:ns:xmpp-bind'>
<jid>%s</jid>
</bind>
</iq>`
fmt.Fprintf(c, result, iq.Id, "test@localhost/test") // TODO use real JID
}
}
func session(t *testing.T, c net.Conn, decoder *xml.Decoder) {
se, err := stanza.NextStart(decoder)
if err != nil {
t.Errorf("cannot read session: %s", err)
return
}
iq := &stanza.IQ{}
// Decode element into pointer storage
if err = decoder.DecodeElement(&iq, &se); err != nil {
t.Errorf("cannot decode session iq: %s", err)
return
}
switch iq.Payload.(type) {
case *stanza.StreamSession:
result := `<iq id='%s' type='result'/>`
fmt.Fprintf(c, result, iq.Id)
}
// This really should not be used as is.
// It's just meant to be a placeholder when error handling is not needed at this level
func clientDefaultErrorHandler(err error) {
}

16
component.go
View File

@ -49,10 +49,11 @@ type Component struct {
// read / write
socketProxy io.ReadWriter // TODO
ErrorHandler func(error)
}
func NewComponent(opts ComponentOptions, r *Router) (*Component, error) {
c := Component{ComponentOptions: opts, router: r}
func NewComponent(opts ComponentOptions, r *Router, errorHandler func(error)) (*Component, error) {
c := Component{ComponentOptions: opts, router: r, ErrorHandler: errorHandler}
return &c, nil
}
@ -104,10 +105,7 @@ func (c *Component) Resume(sm SMState) error {
case stanza.Handshake:
// Start the receiver go routine
c.updateState(StateSessionEstablished)
// Leaving this channel here for later. Not used atm. We should return this instead of an error because right
// now the returned error is lost in limbo.
errChan := make(chan error)
go c.recv(errChan) // Sends to errChan
go c.recv()
return err // Should be empty at this point
default:
c.updateState(StatePermanentError)
@ -128,13 +126,13 @@ func (c *Component) SetHandler(handler EventHandler) {
}
// Receiver Go routine receiver
func (c *Component) recv(errChan chan<- error) {
func (c *Component) recv() {
for {
val, err := stanza.NextPacket(c.transport.GetDecoder())
if err != nil {
c.updateState(StateDisconnected)
errChan <- err
c.ErrorHandler(err)
return
}
// Handle stream errors
@ -142,7 +140,7 @@ func (c *Component) recv(errChan chan<- error) {
case stanza.StreamError:
c.router.route(c, val)
c.streamError(p.Error.Local, p.Text)
errChan <- errors.New("stream error: " + p.Error.Local)
c.ErrorHandler(errors.New("stream error: " + p.Error.Local))
return
}
c.router.route(c, val)

381
component_test.go
View File

@ -5,6 +5,7 @@ import (
"encoding/xml"
"errors"
"fmt"
"github.com/google/uuid"
"gosrc.io/xmpp/stanza"
"net"
"strings"
@ -15,19 +16,7 @@ import (
// Tests are ran in parallel, so each test creating a server must use a different port so we do not get any
// conflict. Using iota for this should do the trick.
const (
testComponentDomain = "localhost"
defaultServerName = "testServer"
defaultStreamID = "91bd0bba-012f-4d92-bb17-5fc41e6fe545"
defaultComponentName = "Test Component"
// Default port is not standard XMPP port to avoid interfering
// with local running XMPP server
testHandshakePort = iota + 15222
testDecoderPort
testSendIqPort
testSendRawPort
testDisconnectPort
testSManDisconnectPort
defaultChannelTimeout = 5 * time.Second
)
func TestHandshake(t *testing.T) {
@ -48,16 +37,14 @@ func TestHandshake(t *testing.T) {
// Tests connection process with a handshake exchange
// Tests multiple session IDs. All connections should generate a unique stream ID
func TestGenerateHandshake(t *testing.T) {
func TestGenerateHandshakeId(t *testing.T) {
// Using this array with a channel to make a queue of values to test
// These are stream IDs that will be used to test the connection process, mixing them with the "secret" to generate
// some handshake value
var uuidsArray = [5]string{
"cc9b3249-9582-4780-825f-4311b42f9b0e",
"bba8be3c-d98e-4e26-b9bb-9ed34578a503",
"dae72822-80e8-496b-b763-ab685f53a188",
"a45d6c06-de49-4bb0-935b-1a2201b71028",
"7dc6924f-0eca-4237-9898-18654b8d891e",
var uuidsArray = [5]string{}
for i := 1; i < len(uuidsArray); i++ {
id, _ := uuid.NewRandom()
uuidsArray[i] = id.String()
}
// Channel to pass stream IDs as a queue
@ -95,7 +82,7 @@ func TestGenerateHandshake(t *testing.T) {
Type: "service",
}
router := NewRouter()
c, err := NewComponent(opts, router)
c, err := NewComponent(opts, router, componentDefaultErrorHandler)
if err != nil {
t.Errorf("%+v", err)
}
@ -126,7 +113,7 @@ func TestStreamManager(t *testing.T) {
// The decoder is expected to be built after a valid connection
// Based on the xmpp_component example.
func TestDecoder(t *testing.T) {
c, _ := mockConnection(t, testDecoderPort, handlerForComponentHandshakeDefaultID)
c, _ := mockComponentConnection(t, testDecoderPort, handlerForComponentHandshakeDefaultID)
if c.transport.GetDecoder() == nil {
t.Errorf("Failed to initialize decoder. Decoder is nil.")
}
@ -134,39 +121,103 @@ func TestDecoder(t *testing.T) {
// Tests sending an IQ to the server, and getting the response
func TestSendIq(t *testing.T) {
done := make(chan struct{})
h := func(t *testing.T, c net.Conn) {
handlerForComponentIQSend(t, c)
done <- struct{}{}
}
//Connecting to a mock server, initialized with given port and handler function
c, m := mockConnection(t, testSendIqPort, handlerForComponentIQSend)
c, m := mockComponentConnection(t, testSendIqPort, h)
ctx, _ := context.WithTimeout(context.Background(), 30*time.Second)
iqReq := stanza.NewIQ(stanza.Attrs{Type: stanza.IQTypeGet, From: "test1@localhost/mremond-mbp", To: defaultServerName, Id: defaultStreamID, Lang: "en"})
disco := iqReq.DiscoInfo()
iqReq.Payload = disco
// Handle a possible error
errChan := make(chan error)
errorHandler := func(err error) {
errChan <- err
}
c.ErrorHandler = errorHandler
var res chan stanza.IQ
res, _ = c.SendIQ(ctx, iqReq)
select {
case <-res:
case <-time.After(100 * time.Millisecond):
case err := <-errChan:
t.Errorf(err.Error())
case <-time.After(defaultChannelTimeout):
t.Errorf("Failed to receive response, to sent IQ, from mock server")
}
select {
case <-done:
m.Stop()
case <-time.After(defaultChannelTimeout):
t.Errorf("The mock server failed to finish its job !")
}
}
// Checking that error handling is done properly client side when an invalid IQ is sent and the server responds in kind.
func TestSendIqFail(t *testing.T) {
done := make(chan struct{})
h := func(t *testing.T, c net.Conn) {
handlerForComponentIQSend(t, c)
done <- struct{}{}
}
//Connecting to a mock server, initialized with given port and handler function
c, m := mockComponentConnection(t, testSendIqFailPort, h)
ctx, _ := context.WithTimeout(context.Background(), 30*time.Second)
iqReq := stanza.NewIQ(stanza.Attrs{Type: stanza.IQTypeGet, From: "test1@localhost/mremond-mbp", To: defaultServerName, Id: defaultStreamID, Lang: "en"})
// Removing the id to make the stanza invalid. The IQ constructor makes a random one if none is specified
// so we need to overwrite it.
iqReq.Id = ""
disco := iqReq.DiscoInfo()
iqReq.Payload = disco
errChan := make(chan error)
errorHandler := func(err error) {
errChan <- err
}
c.ErrorHandler = errorHandler
var res chan stanza.IQ
res, _ = c.SendIQ(ctx, iqReq)
select {
case r := <-res: // Do we get an IQ response from the server ?
t.Errorf("We should not be getting an IQ response here : this should fail !")
fmt.Println(r)
case <-errChan: // Do we get a stream error from the server ?
// If we get an error from the server, the test passes.
case <-time.After(defaultChannelTimeout): // Timeout ?
t.Errorf("Failed to receive response, to sent IQ, from mock server")
}
select {
case <-done:
m.Stop()
case <-time.After(defaultChannelTimeout):
t.Errorf("The mock server failed to finish its job !")
}
}
// Tests sending raw xml to the mock server.
// TODO : check the server response client side ?
// Right now, the server response is not checked and an err is passed in a channel if the test is supposed to err.
// In this test, we use IQs
func TestSendRaw(t *testing.T) {
// Error channel for the handler
errChan := make(chan error)
done := make(chan struct{})
// Handler for the mock server
h := func(t *testing.T, c net.Conn) {
// Completes the connection by exchanging handshakes
handlerForComponentHandshakeDefaultID(t, c)
receiveRawIq(t, c, errChan)
return
receiveIq(c, xml.NewDecoder(c))
done <- struct{}{}
}
type testCase struct {
@ -185,12 +236,19 @@ func TestSendRaw(t *testing.T) {
shouldErr: true,
}
// A handler for the component.
// In the failing test, the server returns a stream error, which triggers this handler, component side.
errChan := make(chan error)
errHandler := func(err error) {
errChan <- err
}
// Tests for all the IQs
for name, tcase := range testRequests {
t.Run(name, func(st *testing.T) {
//Connecting to a mock server, initialized with given port and handler function
c, m := mockConnection(t, testSendRawPort, h)
c, m := mockComponentConnection(t, testSendRawPort, h)
c.ErrorHandler = errHandler
// Sending raw xml from test case
err := c.SendRaw(tcase.req)
if err != nil {
@ -198,21 +256,29 @@ func TestSendRaw(t *testing.T) {
}
// Just wait a little so the message has time to arrive
select {
case <-time.After(100 * time.Millisecond):
// We don't use the default "long" timeout here because waiting it out means passing the test.
case <-time.After(200 * time.Millisecond):
case err = <-errChan:
if err == nil && tcase.shouldErr {
t.Errorf("Failed to get closing stream err")
} else if err != nil && !tcase.shouldErr {
t.Errorf("This test is not supposed to err ! => %s", err.Error())
}
}
c.transport.Close()
select {
case <-done:
m.Stop()
case <-time.After(defaultChannelTimeout):
t.Errorf("The mock server failed to finish its job !")
}
})
}
}
// Tests the Disconnect method for Components
func TestDisconnect(t *testing.T) {
c, m := mockConnection(t, testDisconnectPort, handlerForComponentHandshakeDefaultID)
c, m := mockComponentConnection(t, testDisconnectPort, handlerForComponentHandshakeDefaultID)
err := c.transport.Ping()
if err != nil {
t.Errorf("Could not ping but not disconnected yet")
@ -257,14 +323,97 @@ func TestStreamManagerDisconnect(t *testing.T) {
//=============================================================================
// Basic XMPP Server Mock Handlers.
// Performs a Component connection with a handshake. It uses a default ID defined in this file as a constant.
// Used in the mock server as a Handler
func handlerForComponentHandshakeDefaultID(t *testing.T, c net.Conn) {
decoder := xml.NewDecoder(c)
checkOpenStreamHandshakeDefaultID(t, c, decoder)
readHandshakeComponent(t, decoder)
fmt.Fprintln(c, "<handshake/>") // That's all the server needs to return (see xep-0114)
//===============================
// Init mock server and connection
// Creating a mock server and connecting a Component to it. Initialized with given port and handler function
// The Component and mock are both returned
func mockComponentConnection(t *testing.T, port int, handler func(t *testing.T, c net.Conn)) (*Component, *ServerMock) {
// Init mock server
testComponentAddress := fmt.Sprintf("%s:%d", testComponentDomain, port)
mock := ServerMock{}
mock.Start(t, testComponentAddress, handler)
//==================================
// Create Component to connect to it
c := makeBasicComponent(defaultComponentName, testComponentAddress, t)
//========================================
// Connect the new Component to the server
err := c.Connect()
if err != nil {
t.Errorf("%+v", err)
}
return c, &mock
}
func makeBasicComponent(name string, mockServerAddr string, t *testing.T) *Component {
opts := ComponentOptions{
TransportConfiguration: TransportConfiguration{
Address: mockServerAddr,
Domain: "localhost",
},
Domain: testComponentDomain,
Secret: "mypass",
Name: name,
Category: "gateway",
Type: "service",
}
router := NewRouter()
c, err := NewComponent(opts, router, componentDefaultErrorHandler)
if err != nil {
t.Errorf("%+v", err)
}
c.transport, err = NewComponentTransport(c.ComponentOptions.TransportConfiguration)
if err != nil {
t.Errorf("%+v", err)
}
return c
}
// This really should not be used as is.
// It's just meant to be a placeholder when error handling is not needed at this level
func componentDefaultErrorHandler(err error) {
}
// Sends IQ response to Component request.
// No parsing of the request here. We just check that it's valid, and send the default response.
func handlerForComponentIQSend(t *testing.T, c net.Conn) {
// Completes the connection by exchanging handshakes
handlerForComponentHandshakeDefaultID(t, c)
respondToIQ(t, c)
}
// Used for ID and handshake related tests
func checkOpenStreamHandshakeID(t *testing.T, c net.Conn, decoder *xml.Decoder, streamID string) {
c.SetDeadline(time.Now().Add(defaultTimeout))
defer c.SetDeadline(time.Time{})
for { // TODO clean up. That for loop is not elegant and I prefer bounded recursion.
token, err := decoder.Token()
if err != nil {
t.Errorf("cannot read next token: %s", err)
}
switch elem := token.(type) {
// Wait for first startElement
case xml.StartElement:
if elem.Name.Space != stanza.NSStream || elem.Name.Local != "stream" {
err = errors.New("xmpp: expected <stream> but got <" + elem.Name.Local + "> in " + elem.Name.Space)
return
}
if _, err := fmt.Fprintf(c, serverStreamOpen, "localhost", streamID, stanza.NSComponent, stanza.NSStream); err != nil {
t.Errorf("cannot write server stream open: %s", err)
}
return
}
}
}
func checkOpenStreamHandshakeDefaultID(t *testing.T, c net.Conn, decoder *xml.Decoder) {
checkOpenStreamHandshakeID(t, c, decoder, defaultStreamID)
}
// Performs a Component connection with a handshake. It uses a default ID defined in this file as a constant.
@ -303,152 +452,12 @@ func readHandshakeComponent(t *testing.T, decoder *xml.Decoder) {
}
}
func checkOpenStreamHandshakeDefaultID(t *testing.T, c net.Conn, decoder *xml.Decoder) {
checkOpenStreamHandshakeID(t, c, decoder, defaultStreamID)
}
// Used for ID and handshake related tests
func checkOpenStreamHandshakeID(t *testing.T, c net.Conn, decoder *xml.Decoder, streamID string) {
c.SetDeadline(time.Now().Add(defaultTimeout))
defer c.SetDeadline(time.Time{})
for { // TODO clean up. That for loop is not elegant and I prefer bounded recursion.
token, err := decoder.Token()
if err != nil {
t.Errorf("cannot read next token: %s", err)
}
switch elem := token.(type) {
// Wait for first startElement
case xml.StartElement:
if elem.Name.Space != stanza.NSStream || elem.Name.Local != "stream" {
err = errors.New("xmpp: expected <stream> but got <" + elem.Name.Local + "> in " + elem.Name.Space)
return
}
if _, err := fmt.Fprintf(c, serverStreamOpen, "localhost", streamID, stanza.NSComponent, stanza.NSStream); err != nil {
t.Errorf("cannot write server stream open: %s", err)
}
return
}
}
}
//=============================================================================
// Sends IQ response to Component request.
// No parsing of the request here. We just check that it's valid, and send the default response.
func handlerForComponentIQSend(t *testing.T, c net.Conn) {
// Completes the connection by exchanging handshakes
handlerForComponentHandshakeDefaultID(t, c)
// Decoder to parse the request
// Performs a Component connection with a handshake. It uses a default ID defined in this file as a constant.
// Used in the mock server as a Handler
func handlerForComponentHandshakeDefaultID(t *testing.T, c net.Conn) {
decoder := xml.NewDecoder(c)
iqReq, err := receiveIq(t, c, decoder)
if err != nil {
t.Errorf("Error receiving the IQ stanza : %v", err)
} else if !iqReq.IsValid() {
t.Errorf("server received an IQ stanza : %v", iqReq)
}
// Crafting response
iqResp := stanza.NewIQ(stanza.Attrs{Type: stanza.IQTypeResult, From: iqReq.To, To: iqReq.From, Id: iqReq.Id, Lang: "en"})
disco := iqResp.DiscoInfo()
disco.AddFeatures("vcard-temp",
`http://jabber.org/protocol/address`)
disco.AddIdentity("Multicast", "service", "multicast")
iqResp.Payload = disco
// Sending response to the Component
mResp, err := xml.Marshal(iqResp)
_, err = fmt.Fprintln(c, string(mResp))
if err != nil {
t.Errorf("Could not send response stanza : %s", err)
}
checkOpenStreamHandshakeDefaultID(t, c, decoder)
readHandshakeComponent(t, decoder)
fmt.Fprintln(c, "<handshake/>") // That's all the server needs to return (see xep-0114)
return
}
// Reads next request coming from the Component. Expecting it to be an IQ request
func receiveIq(t *testing.T, c net.Conn, decoder *xml.Decoder) (stanza.IQ, error) {
c.SetDeadline(time.Now().Add(defaultTimeout))
defer c.SetDeadline(time.Time{})
var iqStz stanza.IQ
err := decoder.Decode(&iqStz)
if err != nil {
t.Errorf("cannot read the received IQ stanza: %s", err)
}
if !iqStz.IsValid() {
t.Errorf("received IQ stanza is invalid : %s", err)
}
return iqStz, nil
}
func receiveRawIq(t *testing.T, c net.Conn, errChan chan error) {
c.SetDeadline(time.Now().Add(defaultTimeout))
defer c.SetDeadline(time.Time{})
decoder := xml.NewDecoder(c)
var iq stanza.IQ
err := decoder.Decode(&iq)
if err != nil || !iq.IsValid() {
s := stanza.StreamError{
XMLName: xml.Name{Local: "stream:error"},
Error: xml.Name{Local: "xml-not-well-formed"},
Text: `XML was not well-formed`,
}
raw, _ := xml.Marshal(s)
fmt.Fprintln(c, string(raw))
fmt.Fprintln(c, `</stream:stream>`) // TODO : check this client side
errChan <- fmt.Errorf("invalid xml")
return
}
errChan <- nil
return
}
//===============================
// Init mock server and connection
// Creating a mock server and connecting a Component to it. Initialized with given port and handler function
// The Component and mock are both returned
func mockConnection(t *testing.T, port int, handler func(t *testing.T, c net.Conn)) (*Component, *ServerMock) {
// Init mock server
testComponentAddress := fmt.Sprintf("%s:%d", testComponentDomain, port)
mock := ServerMock{}
mock.Start(t, testComponentAddress, handler)
//==================================
// Create Component to connect to it
c := makeBasicComponent(defaultComponentName, testComponentAddress, t)
//========================================
// Connect the new Component to the server
err := c.Connect()
if err != nil {
t.Errorf("%+v", err)
}
return c, &mock
}
func makeBasicComponent(name string, mockServerAddr string, t *testing.T) *Component {
opts := ComponentOptions{
TransportConfiguration: TransportConfiguration{
Address: mockServerAddr,
Domain: "localhost",
},
Domain: testComponentDomain,
Secret: "mypass",
Name: name,
Category: "gateway",
Type: "service",
}
router := NewRouter()
c, err := NewComponent(opts, router)
if err != nil {
t.Errorf("%+v", err)
}
c.transport, err = NewComponentTransport(c.ComponentOptions.TransportConfiguration)
if err != nil {
t.Errorf("%+v", err)
}
return c
}

207
tcp_server_mock.go
View File

@ -1,12 +1,42 @@
package xmpp
import (
"encoding/xml"
"fmt"
"gosrc.io/xmpp/stanza"
"net"
"testing"
"time"
)
//=============================================================================
// TCP Server Mock
const (
defaultTimeout = 2 * time.Second
testComponentDomain = "localhost"
defaultServerName = "testServer"
defaultStreamID = "91bd0bba-012f-4d92-bb17-5fc41e6fe545"
defaultComponentName = "Test Component"
serverStreamOpen = "<?xml version='1.0'?><stream:stream to='%s' id='%s' xmlns='%s' xmlns:stream='%s' version='1.0'>"
// Default port is not standard XMPP port to avoid interfering
// with local running XMPP server
// Component tests
testHandshakePort = iota + 15222
testDecoderPort
testSendIqPort
testSendIqFailPort
testSendRawPort
testDisconnectPort
testSManDisconnectPort
// Client tests
testClientBasePort
testClientRawPort
testClientIqPort
testClientIqFailPort
)
// ClientHandler is passed by the test client to provide custom behaviour to
// the TCP server mock. This allows customizing the server behaviour to allow
@ -81,3 +111,180 @@ func (mock *ServerMock) loop() {
go mock.handler(mock.t, conn)
}
}
//======================================================================================================================
// A few functions commonly used for tests. Trying to avoid duplicates in client and component test files.
//======================================================================================================================
func respondToIQ(t *testing.T, c net.Conn) {
// Decoder to parse the request
decoder := xml.NewDecoder(c)
iqReq, err := receiveIq(c, decoder)
if err != nil {
t.Fatalf("failed to receive IQ : %s", err.Error())
}
if !iqReq.IsValid() {
mockIQError(c)
return
}
// Crafting response
iqResp := stanza.NewIQ(stanza.Attrs{Type: stanza.IQTypeResult, From: iqReq.To, To: iqReq.From, Id: iqReq.Id, Lang: "en"})
disco := iqResp.DiscoInfo()
disco.AddFeatures("vcard-temp",
`http://jabber.org/protocol/address`)
disco.AddIdentity("Multicast", "service", "multicast")
iqResp.Payload = disco
// Sending response to the Component
mResp, err := xml.Marshal(iqResp)
_, err = fmt.Fprintln(c, string(mResp))
if err != nil {
t.Errorf("Could not send response stanza : %s", err)
}
return
}
// When a presence stanza is automatically sent (right now it's the case in the client), we may want to discard it
// and test further stanzas.
func discardPresence(t *testing.T, c net.Conn) {
decoder := xml.NewDecoder(c)
c.SetDeadline(time.Now().Add(defaultTimeout))
defer c.SetDeadline(time.Time{})
var presenceStz stanza.Presence
err := decoder.Decode(&presenceStz)
if err != nil {
t.Errorf("Expected presence but this happened : %s", err.Error())
}
}
// Reads next request coming from the Component. Expecting it to be an IQ request
func receiveIq(c net.Conn, decoder *xml.Decoder) (*stanza.IQ, error) {
c.SetDeadline(time.Now().Add(defaultTimeout))
defer c.SetDeadline(time.Time{})
var iqStz stanza.IQ
err := decoder.Decode(&iqStz)
if err != nil {
return nil, err
}
return &iqStz, nil
}
// Should be used in server handlers when an IQ sent by a client or component is invalid.
// This responds as expected from a "real" server, aside from the error message.
func mockIQError(c net.Conn) {
s := stanza.StreamError{
XMLName: xml.Name{Local: "stream:error"},
Error: xml.Name{Local: "xml-not-well-formed"},
Text: `XML was not well-formed`,
}
raw, _ := xml.Marshal(s)
fmt.Fprintln(c, string(raw))
fmt.Fprintln(c, `</stream:stream>`)
}
func sendStreamFeatures(t *testing.T, c net.Conn, _ *xml.Decoder) {
// This is a basic server, supporting only 1 stream feature: SASL Plain Auth
features := `<stream:features>
<mechanisms xmlns="urn:ietf:params:xml:ns:xmpp-sasl">
<mechanism>PLAIN</mechanism>
</mechanisms>
</stream:features>`
if _, err := fmt.Fprintln(c, features); err != nil {
t.Errorf("cannot send stream feature: %s", err)
}
}
// TODO return err in case of error reading the auth params
func readAuth(t *testing.T, decoder *xml.Decoder) string {
se, err := stanza.NextStart(decoder)
if err != nil {
t.Errorf("cannot read auth: %s", err)
return ""
}
var nv interface{}
nv = &stanza.SASLAuth{}
// Decode element into pointer storage
if err = decoder.DecodeElement(nv, &se); err != nil {
t.Errorf("cannot decode auth: %s", err)
return ""
}
switch v := nv.(type) {
case *stanza.SASLAuth:
return v.Value
}
return ""
}
func sendBindFeature(t *testing.T, c net.Conn, _ *xml.Decoder) {
// This is a basic server, supporting only 1 stream feature after auth: resource binding
features := `<stream:features>
<bind xmlns='urn:ietf:params:xml:ns:xmpp-bind'/>
</stream:features>`
if _, err := fmt.Fprintln(c, features); err != nil {
t.Errorf("cannot send stream feature: %s", err)
}
}
func sendRFC3921Feature(t *testing.T, c net.Conn, _ *xml.Decoder) {
// This is a basic server, supporting only 2 features after auth: resource & session binding
features := `<stream:features>
<bind xmlns='urn:ietf:params:xml:ns:xmpp-bind'/>
<session xmlns='urn:ietf:params:xml:ns:xmpp-session'/>
</stream:features>`
if _, err := fmt.Fprintln(c, features); err != nil {
t.Errorf("cannot send stream feature: %s", err)
}
}
func bind(t *testing.T, c net.Conn, decoder *xml.Decoder) {
se, err := stanza.NextStart(decoder)
if err != nil {
t.Errorf("cannot read bind: %s", err)
return
}
iq := &stanza.IQ{}
// Decode element into pointer storage
if err = decoder.DecodeElement(&iq, &se); err != nil {
t.Errorf("cannot decode bind iq: %s", err)
return
}
// TODO Check all elements
switch iq.Payload.(type) {
case *stanza.Bind:
result := `<iq id='%s' type='result'>
<bind xmlns='urn:ietf:params:xml:ns:xmpp-bind'>
<jid>%s</jid>
</bind>
</iq>`
fmt.Fprintf(c, result, iq.Id, "test@localhost/test") // TODO use real JID
}
}
func session(t *testing.T, c net.Conn, decoder *xml.Decoder) {
se, err := stanza.NextStart(decoder)
if err != nil {
t.Errorf("cannot read session: %s", err)
return
}
iq := &stanza.IQ{}
// Decode element into pointer storage
if err = decoder.DecodeElement(&iq, &se); err != nil {
t.Errorf("cannot decode session iq: %s", err)
return
}
switch iq.Payload.(type) {
case *stanza.StreamSession:
result := `<iq id='%s' type='result'/>`
fmt.Fprintf(c, result, iq.Id)
}
}