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81 lines
2.5 KiB
Markdown
81 lines
2.5 KiB
Markdown
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# XMPP Stanza
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XMPP `stanza` package is use to parse, marshall and and unmarshal XMPP stanzas and nonzas.
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## Stanza creation
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When creating stanzas, you can use two approaches:
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1. You can create IQ, Presence or Message structs, set the fields and manually prepare extensions struct to add to the
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stanza.
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2. You can use `stanza` Builder providing
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The methods are equivalent and you can use whatever suits you best. The Builder will generate the same type of
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struct that you can build by hand.
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### Composing stanzas manually with structs
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Here is for example how you would generate an IQ discovery result:
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iqResp := stanza.NewIQ(stanza.Attrs{Type: "result", From: iq.To, To: iq.From, Id: iq.Id, Lang: "en"})
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identity := stanza.Identity{
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Name: opts.Name,
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Category: opts.Category,
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Type: opts.Type,
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}
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payload := stanza.DiscoInfo{
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XMLName: xml.Name{
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Space: stanza.NSDiscoInfo,
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Local: "query",
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},
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Identity: identity,
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Features: []stanza.Feature{
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{Var: stanza.NSDiscoInfo},
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{Var: stanza.NSDiscoItems},
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{Var: "jabber:iq:version"},
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{Var: "urn:xmpp:delegation:1"},
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},
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}
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iqResp.Payload = &payload
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### Using Builder
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Here is for example how you would generate an IQ discovery result using Builder:
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b := stanza.NewBuilder()
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iq := b.IQ(stanza.Attrs{Type: "get", To: "service.localhost", Id: "disco-get-1"})
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payload := b.DiscoInfo()
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identity := b.Identity("Test Component", "gateway", "service")
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payload.SetFeatures(stanza.NSDiscoInfo, stanza.NSDiscoItems, "jabber:iq:version", "urn:xmpp:delegation:1").
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SetIdentities(identity)
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iq.Payload = payload
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## Payload and extensions
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### Message
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### Presence
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### IQ
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IQ (Information Queries) contain a payload associated with the request and possibly an error. The main difference with
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Message and Presence extension is that you can only have one payload per IQ. The XMPP specification does not support
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having multiple payloads.
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Here is the list of structs implementing IQPayloads:
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- BindBind
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- Pubsub
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Finally, when the payload of the parsed stanza is unknown, the parser will provide the unknown payload as a generic
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`Node` element. You can also use the Node struct to add custom information on stanza generation. However, in both cases,
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you may also consider [adding your own custom extensions on stanzas]().
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## Adding your own custom extensions on stanzas
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Extensions are registered on launch using the `Registry`. It can be used to register you own custom payload. You may
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want to do so to support extensions we did not yet implement, or to add your own custom extensions to your XMPP stanzas.
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