Use etree to create disco info request.

const.go

@@ -6,6 +6,7 @@ package main
 
 const (
 	version          = "0.4.0-devel"
+	nsDiscoInfo      = "http://jabber.org/protocol/disco#info"
 	nsEme            = "urn:xmpp:eme:0"
 	nsHints          = "urn:xmpp:hints"
 	nsHTTPUpload     = "urn:xmpp:http:upload:0"

httpupload.go

@@ -69,8 +69,14 @@ func httpUpload(client *xmpp.Client, jserver string, filePath string) string {
 	// Check the services reported by disco#items for the http upload service
 	for _, r := range iqDiscoItemsXMLItems {
 		jid := r.SelectAttr("jid")
-		iqDiscoInfo, err := sendIQ(client, jid.Value, "get",
-			"<query xmlns='http://jabber.org/protocol/disco#info'/>")
+		iqDiscoInfoReqXML := etree.NewDocument()
+		iqDiscoInfoReqXMLQuery := iqDiscoInfoReqXML.CreateElement("query")
+		iqDiscoInfoReqXMLQuery.CreateAttr("xmlns", nsDiscoInfo)
+		iqdi, err := iqDiscoInfoReqXML.WriteToString()
+		if err != nil {
+			log.Fatal(err)
+		}
+		iqDiscoInfo, err := sendIQ(client, jid.Value, "get", iqdi)
 		if err != nil {
 			log.Fatal(err)
 		}