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private.go
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private.go
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/*
* Copyright (c) 2018 Miguel Ángel Ortuño.
* See the LICENSE file for more information.
*/
package xep0049
import (
"strings"
"github.com/ortuman/jackal/log"
"github.com/ortuman/jackal/storage"
"github.com/ortuman/jackal/stream"
"github.com/ortuman/jackal/xmpp"
)
const mailboxSize = 2048
const privateNamespace = "jabber:iq:private"
// Private represents a private storage server stream module.
type Private struct {
actorCh chan func()
shutdownCh <-chan struct{}
}
// New returns a private storage IQ handler module.
func New(shutdownCh <-chan struct{}) *Private {
x := &Private{
actorCh: make(chan func(), mailboxSize),
shutdownCh: shutdownCh,
}
go x.loop()
return x
}
// MatchesIQ returns whether or not an IQ should be
// processed by the private storage module.
func (x *Private) MatchesIQ(iq *xmpp.IQ) bool {
return iq.Elements().ChildNamespace("query", privateNamespace) != nil
}
// ProcessIQ processes a private storage IQ
// taking according actions over the associated stream
func (x *Private) ProcessIQ(iq *xmpp.IQ, stm stream.C2S) {
x.actorCh <- func() { x.processIQ(iq, stm) }
}
// runs on it's own goroutine
func (x *Private) loop() {
for {
select {
case f := <-x.actorCh:
f()
case <-x.shutdownCh:
return
}
}
}
func (x *Private) processIQ(iq *xmpp.IQ, stm stream.C2S) {
q := iq.Elements().ChildNamespace("query", privateNamespace)
toJid := iq.ToJID()
validTo := toJid.IsServer() || toJid.Node() == stm.Username()
if !validTo {
stm.SendElement(iq.ForbiddenError())
return
}
if iq.IsGet() {
x.getPrivate(iq, q, stm)
} else if iq.IsSet() {
x.setPrivate(iq, q, stm)
} else {
stm.SendElement(iq.BadRequestError())
return
}
}
func (x *Private) getPrivate(iq *xmpp.IQ, q xmpp.XElement, stm stream.C2S) {
if q.Elements().Count() != 1 {
stm.SendElement(iq.NotAcceptableError())
return
}
privElem := q.Elements().All()[0]
privNS := privElem.Namespace()
isValidNS := x.isValidNamespace(privNS)
if privElem.Elements().Count() > 0 || !isValidNS {
stm.SendElement(iq.NotAcceptableError())
return
}
log.Infof("retrieving private element. ns: %s... (%s/%s)", privNS, stm.Username(), stm.Resource())
privElements, err := storage.Instance().FetchPrivateXML(privNS, stm.Username())
if err != nil {
log.Error(err)
stm.SendElement(iq.InternalServerError())
return
}
res := iq.ResultIQ()
query := xmpp.NewElementNamespace("query", privateNamespace)
if privElements != nil {
query.AppendElements(privElements)
} else {
query.AppendElement(xmpp.NewElementNamespace(privElem.Name(), privElem.Namespace()))
}
res.AppendElement(query)
stm.SendElement(res)
}
func (x *Private) setPrivate(iq *xmpp.IQ, q xmpp.XElement, stm stream.C2S) {
nsElements := map[string][]xmpp.XElement{}
for _, privElement := range q.Elements().All() {
ns := privElement.Namespace()
if len(ns) == 0 {
stm.SendElement(iq.BadRequestError())
return
}
if !x.isValidNamespace(privElement.Namespace()) {
stm.SendElement(iq.NotAcceptableError())
return
}
elems := nsElements[ns]
if elems == nil {
elems = []xmpp.XElement{privElement}
} else {
elems = append(elems, privElement)
}
nsElements[ns] = elems
}
for ns, elements := range nsElements {
log.Infof("saving private element. ns: %s... (%s/%s)", ns, stm.Username(), stm.Resource())
if err := storage.Instance().InsertOrUpdatePrivateXML(elements, ns, stm.Username()); err != nil {
log.Error(err)
stm.SendElement(iq.InternalServerError())
return
}
}
stm.SendElement(iq.ResultIQ())
}
func (x *Private) isValidNamespace(ns string) bool {
return !strings.HasPrefix(ns, "jabber:") && !strings.HasPrefix(ns, "http://jabber.org/") && ns != "vcard-temp"
}