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go-xmpp
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Merge pull request #6 "Error parsing / generation"

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disco_info_form
Mickaël Rémond 6 years ago committed by GitHub
parent 80f2888cff fb8d050a00
commit adb14260f0
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GPG Key ID: 4AEE18F83AFDEB23
9 changed files with 330 additions and 114 deletions
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4
auth.go
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@ -104,13 +104,13 @@ type auth struct {
Value string `xml:",innerxml"`
}
type bindBind struct {
type BindBind struct {
XMLName xml.Name `xml:"urn:ietf:params:xml:ns:xmpp-bind bind"`
Resource string `xml:"resource,omitempty"`
Jid string `xml:"jid,omitempty"`
}
func (*bindBind) IsIQPayload() {
func (*BindBind) IsIQPayload() {
}
// Session is obsolete in RFC 6121.

1
client.go
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@ -127,6 +127,7 @@ func (c *Client) Recv() <-chan interface{} {
}
// Send sends message text.
// TODO Move to Go XML Marshaller
func (c *Client) Send(packet string) error {
fmt.Fprintf(c.Session.socketProxy, packet) // TODO handle errors
return nil

2
client_test.go
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@ -172,7 +172,7 @@ func bind(t *testing.T, c net.Conn, decoder *xml.Decoder) {
// TODO Check all elements
switch iq.Payload[0].(type) {
case *bindBind:
case *BindBind:
result := `<iq id='%s' type='result'>
<bind xmlns='urn:ietf:params:xml:ns:xmpp-bind'>
<jid>%s</jid>

72
cmd/xmpp_component/xmpp_component.go
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@ -1,7 +1,6 @@
package main
import (
"encoding/xml"
"fmt"
"fluux.io/xmpp"
@ -22,28 +21,28 @@ func main() {
switch p := packet.(type) {
case xmpp.IQ:
switch inner := p.Payload[0].(type) {
case *xmpp.Node:
fmt.Printf("%q\n", inner)
data, err := xml.Marshal(inner)
if err != nil {
fmt.Println("cannot marshall payload")
case *xmpp.DiscoInfo:
fmt.Println("Disco Info")
if p.Type == "get" {
DiscoResult(component, p.From, p.To, p.Id)
}
fmt.Println("data=", string(data))
component.processIQ(p.Type, p.Id, p.From, inner)
default:
fmt.Println("default")
fmt.Println("ignoring iq packet", inner)
xerror := xmpp.Err{
Code: 501,
Reason: "feature-not-implemented",
Type: "cancel",
}
reply := p.MakeError(xerror)
component.xmpp.Send(&reply)
}
default:
fmt.Println("Packet unhandled packet:", packet)
fmt.Println("ignoring packet:", packet)
}
}
}
const (
NSDiscoInfo = "http://jabber.org/protocol/disco#info"
)
type MyComponent struct {
Name string
// Typical categories and types: https://xmpp.org/registrar/disco-categories.html
@ -53,34 +52,19 @@ type MyComponent struct {
xmpp *xmpp.Component
}
func (c MyComponent) processIQ(iqType, id, from string, inner *xmpp.Node) {
fmt.Println("Node:", inner.XMLName.Space, inner.XMLName.Local)
switch inner.XMLName.Space + " " + iqType {
case NSDiscoInfo + " get":
fmt.Println("Send Disco Info")
result := fmt.Sprintf(`<iq type='result'
from='%s'
to='%s'
id='%s'>
<query xmlns='http://jabber.org/protocol/disco#info'>
<identity
category='%s'
type='%s'
name='%s'/>
<feature var='http://jabber.org/protocol/disco#info'/>
<feature var='http://jabber.org/protocol/disco#items'/>
</query>
</iq>`, c.xmpp.Host, from, id, c.Category, c.Type, c.Name)
c.xmpp.Send(result)
default:
iqErr := fmt.Sprintf(`<iq type='error'
from='%s'
to='%s'
id='%s'>
<error type="cancel" code="501">
<feature-not-implemented xmlns="urn:ietf:params:xml:ns:xmpp-stanzas"/>
</error>
</iq>`, c.xmpp.Host, from, id)
c.xmpp.Send(iqErr)
func DiscoResult(c MyComponent, from, to, id string) {
iq := xmpp.NewIQ("result", to, from, id, "en")
payload := xmpp.DiscoInfo{
Identity: xmpp.Identity{
Name: c.Name,
Category: c.Category,
Type: c.Type,
},
Features: []xmpp.Feature{
{Var: "http://jabber.org/protocol/disco#info"},
{Var: "http://jabber.org/protocol/disco#item"},
},
}
iq.AddPayload(&payload)
c.xmpp.Send(iq)
}

9
component.go
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@ -94,8 +94,13 @@ func (c *Component) ReadPacket() (Packet, error) {
return next(c.decoder)
}
func (c *Component) Send(packet string) error {
if _, err := fmt.Fprintf(c.conn, packet); err != nil {
func (c *Component) Send(packet Packet) error {
data, err := xml.Marshal(packet)
if err != nil {
return errors.New("cannot marshal packet " + err.Error())
}
if _, err := fmt.Fprintf(c.conn, string(data)); err != nil {
return errors.New("cannot send packet " + err.Error())
}
return nil

257
iq.go
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@ -4,32 +4,156 @@ import (
"encoding/xml"
"fmt"
"reflect"
"strconv"
"fluux.io/xmpp/iot"
)
/*
TODO I would like to be able to write
newIQ(Id, From, To, Type, Lang).AddPayload(IQPayload)
NewIQ(Id, From, To, Type, Lang).AddPayload(IQPayload)
Payload would be:
xmpp.IQ{
XMLName: xml.Name{
Space: "",
Local: "",
},
PacketAttrs: xmpp.PacketAttrs{
Id: "",
From: "",
To: "",
Type: "",
Lang: "",
},
Payload: nil,
RawXML: "",
}
payload := Node{
Ns: "http://jabber.org/protocol/disco#info",
Tag: "identity",
Attrs: map[string]string{
"category":"gateway",
"type": "skype",
"name": "Test Gateway",
},
Nodes: []Node{},
}
AddPayload(Ns, Tag, Attrs)
ex:
NewIQ("get", "test@localhost", "admin@localhost", "en")
.AddPayload("http://jabber.org/protocol/disco#info",
"identity",
map[string]string{
"category":"gateway",
"type": "skype",
"name": "Test Gateway",
})
NewNode(Ns, Tag, Attrs)
NewNodeWithChildren(Ns, Tag, Attrs, Nodes)
Attr {
K string
V string
}
xmpp.Elt.DiscoInfo("identity", "gateway", "skype", "Test Gateway")
xmppElt.DiscoInfo.identity("
import xmpp/node/discoinfo
discoinfo.Identity("gateway", "skype", "Test Gateway")
[]Attr{{"category", "gateway"}
TODO support ability to put Raw payload
*/
// ============================================================================
// XMPP Errors
type Err struct {
XMLName xml.Name `xml:"error"`
Code int `xml:"code,attr,omitempty"`
Type string `xml:"type,attr,omitempty"`
Reason string
Text string `xml:"urn:ietf:params:xml:ns:xmpp-stanzas text,omitempty"`
}
func (*Err) IsIQPayload() {}
// UnmarshalXML implements custom parsing for IQs
func (x *Err) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
x.XMLName = start.Name
// Extract attributes
for _, attr := range start.Attr {
if attr.Name.Local == "type" {
x.Type = attr.Value
}
if attr.Name.Local == "code" {
if code, err := strconv.Atoi(attr.Value); err == nil {
x.Code = code
}
}
}
for {
t, err := d.Token()
if err != nil {
return err
}
switch tt := t.(type) {
case xml.StartElement:
elt := new(Node)
err = d.DecodeElement(elt, &tt)
if err != nil {
return err
}
textName := xml.Name{Space: "urn:ietf:params:xml:ns:xmpp-stanzas", Local: "text"}
if elt.XMLName == textName {
x.Text = string(elt.Content)
} else if elt.XMLName.Space == "urn:ietf:params:xml:ns:xmpp-stanzas" {
x.Reason = elt.XMLName.Local
}
case xml.EndElement:
if tt == start.End() {
return nil
}
}
}
}
func (x Err) MarshalXML(e *xml.Encoder, start xml.StartElement) (err error) {
code := xml.Attr{
Name: xml.Name{Local: "code"},
Value: strconv.Itoa(x.Code),
}
typ := xml.Attr{
Name: xml.Name{Local: "type"},
Value: x.Type,
}
start.Name = xml.Name{Local: "error"}
start.Attr = append(start.Attr, code, typ)
err = e.EncodeToken(start)
// Subtags
// Reason
if x.Reason != "" {
reason := xml.Name{Space: "urn:ietf:params:xml:ns:xmpp-stanzas", Local: x.Reason}
e.EncodeToken(xml.StartElement{Name: reason})
e.EncodeToken(xml.EndElement{Name: reason})
}
// Text
if x.Text != "" {
text := xml.Name{Space: "urn:ietf:params:xml:ns:xmpp-stanzas", Local: "text"}
e.EncodeToken(xml.StartElement{Name: text})
e.EncodeToken(xml.CharData(x.Text))
e.EncodeToken(xml.EndElement{Name: text})
}
return e.EncodeToken(xml.EndElement{Name: start.Name})
}
// ============================================================================
// IQ Packet
@ -38,7 +162,7 @@ type IQ struct { // Info/Query
PacketAttrs
Payload []IQPayload `xml:",omitempty"`
RawXML string `xml:",innerxml"`
// Error clientError
Error Err `xml:"error,omitempty"`
}
func NewIQ(iqtype, from, to, id, lang string) IQ {
@ -58,6 +182,18 @@ func (iq *IQ) AddPayload(payload IQPayload) {
iq.Payload = append(iq.Payload, payload)
}
func (iq IQ) MakeError(xerror Err) IQ {
from := iq.From
to := iq.To
iq.Type = "error"
iq.From = to
iq.To = from
iq.Error = xerror
return iq
}
func (IQ) Name() string {
return "iq"
}
@ -75,6 +211,7 @@ func (iqDecoder) decode(p *xml.Decoder, se xml.StartElement) (IQ, error) {
// UnmarshalXML implements custom parsing for IQs
func (iq *IQ) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
iq.XMLName = start.Name
// Extract IQ attributes
for _, attr := range start.Attr {
if attr.Name.Local == "id" {
@ -95,34 +232,38 @@ func (iq *IQ) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
}
// decode inner elements
level := 0
for {
t, err := d.Token()
if err != nil {
return err
}
var p IQPayload
switch tt := t.(type) {
case xml.StartElement:
switch tt.Name.Space + " " + tt.Name.Local {
case "urn:ietf:params:xml:ns:xmpp-bind bind":
p = new(bindBind)
case "urn:xmpp:iot:control set":
p = new(iot.ControlSet)
default:
p = new(Node)
}
if p != nil {
err = d.DecodeElement(p, &tt)
if err != nil {
return err
level++
if level <= 1 {
var elt interface{}
payloadType := tt.Name.Space + " " + tt.Name.Local
if payloadType := typeRegistry[payloadType]; payloadType != nil {
val := reflect.New(payloadType)
elt = val.Interface()
} else {
elt = new(Node)
}
if iqPl, ok := elt.(IQPayload); ok {
err = d.DecodeElement(elt, &tt)
if err != nil {
return err
}
iq.Payload = append(iq.Payload, iqPl)
}
iq.Payload = []IQPayload{p}
p = nil
}
case xml.EndElement:
level--
if tt == start.End() {
return nil
}
@ -161,14 +302,19 @@ type IQPayload interface {
type Node struct {
XMLName xml.Name
Attrs []xml.Attr `xml:"-"`
// Content []byte `xml:",innerxml"`
Nodes []Node `xml:",any"`
Content string `xml:",innerxml"`
Nodes []Node `xml:",any"`
}
type Attr struct {
K string
V string
}
func (n *Node) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
// Assign "n.Attrs = start.Attr", without repeating xmlns in attributes
// Assign "n.Attrs = start.Attr", without repeating xmlns in attributes:
for _, attr := range start.Attr {
// Do not repeat xmlns
// Do not repeat xmlns, it is already in XMLName
if attr.Name.Local != "xmlns" {
n.Attrs = append(n.Attrs, attr)
}
@ -177,7 +323,7 @@ func (n *Node) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
return d.DecodeElement((*node)(n), &start)
}
func (n *Node) MarshalXML(e *xml.Encoder, start xml.StartElement) (err error) {
func (n Node) MarshalXML(e *xml.Encoder, start xml.StartElement) (err error) {
start.Attr = n.Attrs
start.Name = n.XMLName
@ -187,3 +333,40 @@ func (n *Node) MarshalXML(e *xml.Encoder, start xml.StartElement) (err error) {
}
func (*Node) IsIQPayload() {}
// ============================================================================
// Disco
const (
NSDiscoInfo = "http://jabber.org/protocol/disco#info"
)
type DiscoInfo struct {
XMLName xml.Name `xml:"http://jabber.org/protocol/disco#info query"`
Identity Identity `xml:"identity"`
Features []Feature `xml:"feature"`
}
func (*DiscoInfo) IsIQPayload() {}
type Identity struct {
XMLName xml.Name `xml:"identity,omitempty"`
Name string `xml:"name,attr,omitempty"`
Category string `xml:"category,attr,omitempty"`
Type string `xml:"type,attr,omitempty"`
}
type Feature struct {
XMLName xml.Name `xml:"feature"`
Var string `xml:"var,attr"`
}
// ============================================================================
var typeRegistry = make(map[string]reflect.Type)
func init() {
typeRegistry["http://jabber.org/protocol/disco#info query"] = reflect.TypeOf(DiscoInfo{})
typeRegistry["urn:ietf:params:xml:ns:xmpp-bind bind"] = reflect.TypeOf(BindBind{})
typeRegistry["urn:xmpp:iot:control set"] = reflect.TypeOf(iot.ControlSet{})
}

95
iq_test.go
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@ -2,8 +2,9 @@ package xmpp // import "fluux.io/xmpp"
import (
"encoding/xml"
"reflect"
"testing"
"github.com/google/go-cmp/cmp"
)
func TestUnmarshalIqs(t *testing.T) {
@ -17,49 +18,91 @@ func TestUnmarshalIqs(t *testing.T) {
}
for _, test := range tests {
var parsedIQ = new(IQ)
err := xml.Unmarshal([]byte(test.iqString), parsedIQ)
parsedIQ := IQ{}
err := xml.Unmarshal([]byte(test.iqString), &parsedIQ)
if err != nil {
t.Errorf("Unmarshal(%s) returned error", test.iqString)
}
if !reflect.DeepEqual(parsedIQ, &test.parsedIQ) {
t.Errorf("Unmarshal(%s) expecting result %+v = %+v", test.iqString, parsedIQ, &test.parsedIQ)
if !xmlEqual(parsedIQ, test.parsedIQ) {
t.Errorf("non matching items\n%s", cmp.Diff(parsedIQ, test.parsedIQ))
}
}
}
func TestGenerateIq(t *testing.T) {
iq := NewIQ("get", "admin@localhost", "test@localhost", "1", "en")
payload := Node{
XMLName: xml.Name{
Space: "http://jabber.org/protocol/disco#info",
Local: "query",
iq := NewIQ("result", "admin@localhost", "test@localhost", "1", "en")
payload := DiscoInfo{
Identity: Identity{
Name: "Test Gateway",
Category: "gateway",
Type: "mqtt",
},
Features: []Feature{
{Var: "http://jabber.org/protocol/disco#info"},
{Var: "http://jabber.org/protocol/disco#item"},
},
Nodes: []Node{
{XMLName: xml.Name{
Space: "http://jabber.org/protocol/disco#info",
Local: "identity",
},
Attrs: []xml.Attr{
{Name: xml.Name{Local: "category"}, Value: "gateway"},
{Name: xml.Name{Local: "type"}, Value: "skype"},
{Name: xml.Name{Local: "name"}, Value: "Test Gateway"},
},
Nodes: nil,
}},
}
iq.AddPayload(&payload)
data, err := xml.Marshal(iq)
if err != nil {
t.Errorf("cannot marshal xml structure")
}
var parsedIQ = new(IQ)
if err = xml.Unmarshal(data, parsedIQ); err != nil {
parsedIQ := IQ{}
if err = xml.Unmarshal(data, &parsedIQ); err != nil {
t.Errorf("Unmarshal(%s) returned error", data)
}
if !xmlEqual(parsedIQ.Payload, iq.Payload) {
t.Errorf("non matching items\n%s", cmp.Diff(parsedIQ.Payload, iq.Payload))
}
}
func TestErrorTag(t *testing.T) {
xError := Err{
XMLName: xml.Name{Local: "error"},
Code: 503,
Type: "cancel",
Reason: "service-unavailable",
Text: "User session not found",
}
data, err := xml.Marshal(xError)
if err != nil {
t.Errorf("cannot marshal xml structure: %s", err)
}
parsedError := Err{}
if err = xml.Unmarshal(data, &parsedError); err != nil {
t.Errorf("Unmarshal(%s) returned error", data)
}
if !reflect.DeepEqual(parsedIQ.Payload[0], iq.Payload[0]) {
t.Errorf("expecting result %+v = %+v", parsedIQ.Payload[0], iq.Payload[0])
if !xmlEqual(parsedError, xError) {
t.Errorf("non matching items\n%s", cmp.Diff(parsedError, xError))
}
}
// Compare iq structure but ignore empty namespace as they are set properly on
// marshal / unmarshal. There is no need to manage them on the manually
// crafted structure.
func xmlEqual(x, y interface{}) bool {
alwaysEqual := cmp.Comparer(func(_, _ interface{}) bool { return true })
opts := cmp.Options{
cmp.FilterValues(func(x, y interface{}) bool {
xx, xok := x.(xml.Name)
yy, yok := y.(xml.Name)
if xok && yok {
zero := xml.Name{}
if xx == zero || yy == zero {
return true
}
}
return false
}, alwaysEqual),
}
return cmp.Equal(x, y, opts)
}

2
session.go
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@ -165,7 +165,7 @@ func (s *Session) bind(o Options) {
// TODO Check all elements
switch payload := iq.Payload[0].(type) {
case *bindBind:
case *BindBind:
s.BindJid = payload.Jid // our local id (with possibly randomly generated resource
default:
s.err = errors.New("iq bind result missing")

2
stream.go
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@ -12,7 +12,7 @@ type streamFeatures struct {
StartTLS tlsStartTLS
Caps Caps
Mechanisms saslMechanisms
Bind bindBind
Bind BindBind
Session sessionSession
Any []xml.Name `xml:",any"`
}

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