best xmpp (google chat) lib in golang?

Steven Degutis

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Sep 5, 2012, 9:59:40 PM9/5/12

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I have half a mind to experiment with writing my own google-chat-based instant messenger in the next year, and Go seems like a great language to do this in. Does anyone recommend a particular library for interfacing with google's xmpp servers?

-Steven

Kyle Lemons

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Sep 6, 2012, 3:37:02 PM9/6/12

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I have heard good things about libpurple for chat clients if you don't want to interact with the protocol. Since XMPP is XML, though, and fairly straightforward, you could probably.get it done with the built-in xml support.

John Beisley

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Sep 7, 2012, 2:30:19 AM9/7/12

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https://github.com/mattn/go-xmpp says it was forked from an original effort by rsc. Never tried it myself, though.

Jesse McNelis

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Sep 7, 2012, 2:53:19 AM9/7/12

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Perhaps,
https://github.com/agl/xmpp

--
=====================
http://jessta.id.au

Russ Cox

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Oct 9, 2012, 10:25:26 AM10/9/12

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http://go.pkgdoc.org/code.google.com/p/rsc/xmpp
http://code.google.com/p/rsc/source/browse/google/acme/Chat/main.go

Steven Degutis

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Oct 9, 2012, 10:39:13 AM10/9/12

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Perfect! Thanks!

-Steven

On Tuesday, October 9, 2012 9:25:34 AM UTC-5, Russ Cox wrote:

http://go.pkgdoc.org/code.google.com/p/rsc/xmpp
http://code.google.com/p/rsc/source/browse/google/acme/Chat/main.go

Steven Degutis

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Oct 9, 2012, 11:20:02 PM10/9/12

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Russ, I'm having a bit of trouble sending from this package. Every time I send to a user, I get an xmpp.Chat back that is identical to what I tried to send except with Type as "error". Following your example code in http://code.google.com/p/rsc/source/browse/google/acme/Chat/main.go I am creating a new xmpp.Chat with Remote equal to the receiving chat.Remote up to but not including the first "/" character, with Type as "chat" and Text as a string. Is this not correct?

Kyle Lemons

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Oct 10, 2012, 3:34:19 PM10/10/12

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Can you print out the raw XML? An XMPP error should have some explanatory text saying what it is, though I seem to recall it not being easy to programatically extract.

--

Steven Degutis

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Oct 10, 2012, 3:40:51 PM10/10/12

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I tried that very debugging technique but could not figure out where to print out the raw XML request in his xmpp library.

-Steven

Message has been deleted

Kyle Lemons

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Oct 10, 2012, 4:00:11 PM10/10/12

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I'd inject a multiwriter / teereader in between the connection and the xml encoder/decoder, with the second stream going to stdout.

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Steven Degutis

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Oct 10, 2012, 4:21:21 PM10/10/12

to golan...@googlegroups.com, Steven Degutis, chris.j...@gmail.com

Oh I see now. When I send a response chat back to whoever sends me a chat (like an echo server), via client.Send(xmpp.Chat{Remote: incomingChat.Remote, Type: "chat", Text: "foobla"}) then I get this XML response back:

<message to="" from="igno...@real.email.com" type="error" xml:lang="en"><body>foobla</body><error code="400" type="modify"><jid-malformed xmlns="urn:ietf:params:xml:ns:xmpp-stanzas"/><text xmlns="urn:ietf:params:xml:ns:xmpp-stanzas">Malformed JID '': domain is empty</text></error></message>

But as far as I can tell the sample code Russ posted previously does this same thing. I've also tried not deleting everything including and after the first slash from the incoming name, but I get basically the same response back, with definitely the same error:

<message to="" from="igno...@real.email.com/Steven’s MA48440E8" type="error" xml:lang="en"><body>foobla</body><error code="400" type="modify"><jid-malformed xmlns="urn:ietf:params:xml:ns:xmpp-stanzas"/><text xmlns="urn:ietf:params:xml:ns:xmpp-stanzas">Malformed JID '': domain is empty</text></error></message>

I'm just confused because as far as I can tell I'm doing the same thing Russ's sample code is doing at http://code.google.com/p/rsc/source/browse/google/acme/Chat/main.go

-Steven

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Steven Degutis

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Oct 11, 2012, 6:24:19 AM10/11/12

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Ah, I see. Turns out I'm sending:

<message to='a.r...@email.com/Steven’s MB694B29E' from='' type='chat' xml:lang='en'><body>foobla</body></message>

This seems to indicate that my Client object actually has an empty jid field, which appears to be a bug in Russ's xmpp library, I'm guessing somewhere around http://code.google.com/p/rsc/source/browse/xmpp/xmpp.go#213

I'll dig into it further, although I'm pretty confused by this code and not a very smart programmer so I'm not sure how much progress I can make. Russ if you're reading this, do you have any tips as to what could be causing it to get a wrong jid? I clearly see that in my response I'm getting this back:

<iq id="x" type="result"><bind xmlns="urn:ietf:params:xml:ns:xmpp-bind"><jid>a.r...@email.com/23F41190</jid></bind></iq>

And when I print out the value of the iq object right after decoding it, sticking the printing code at line 214, I get this:

xmpp.clientIQ{XMLName:xml.Name{Space:"jabber:client", Local:"iq"}, From:"", Id:"", To:"", Type:"", Error:xmpp.clientError{XMLName:xml.Name{Space:"", Local:""}, Code:"", Type:"", Any:xml.Name{Space:"", Local:""}, Text:""}, Bind:xmpp.bindBind{XMLName:xml.Name{Space:"urn:ietf:params:xml:ns:xmpp-bind", Local:"bind"}, Resource:"", Jid:""}, Query:xmpp.clientQuery{Item:[]xmpp.rosterItem(nil)}}

And I believe it's using the above line of XML because on line 207 right before decoding the XML into the iq object, I'm printing "Starting to decode IQ!" and seeing it printed right before the above <iq> element.

-Steven

On Wednesday, October 10, 2012 4:12:42 PM UTC-5, PeteT wrote:

I'm just confused because as far as I can tell I'm doing the same thing Russ's sample code is doing at http://code.google.com/p/rsc/source/browse/google/acme/Chat/main.go

To help find the problem, I recommend logging what you are writing to the server in addition to what you are reading.

Kyle Lemons

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Oct 11, 2012, 5:32:18 PM10/11/12

to Steven Degutis, golan...@googlegroups.com, chris.j...@gmail.com

On Thu, Oct 11, 2012 at 3:24 AM, Steven Degutis <sdeg...@8thlight.com> wrote:

Ah, I see. Turns out I'm sending:

<message to='a.r...@email.com/Steven’s MB694B29E' from='' type='chat' xml:lang='en'><body>foobla</body></message>

I can't tell if this is what you mean, but to me the 's looks like it's what's killing that line.

--

Russ Cox

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Oct 16, 2012, 2:05:25 PM10/16/12

to Kyle Lemons, Steven Degutis, golan...@googlegroups.com, chris.j...@gmail.com

Sorry, I have been without time to read golang-nuts for a week or so.
It seems entirely possible that I screwed up the jid when I updated
the code to work with Go 1 [sic]. My suggestion would be to diff my
code against mattn's code on github. I prefer the API of my package
but I haven't used it recently. Mattn's code may be semantically
better as far as XMPP protocol details.

Russ

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