gae/

README

Contact support@pubnub.com for all questions

#PubNub 3.6 client for Google App Engine using Go

Features

• 3.6 features
• HereNow with state (here now's signature has changed, the response has also changed)
• WhereNow
• Global Here Now
• User State (Set, Get, Delete)
• Presence heartbeat
• Presence heartbeat interval
• PAM: To use the PAM features in the example please enable PAM from the Pubnub admin console (https://admin.pubnub.com) and replace the publish, subscribe and secret keys in the example.
• Multiple messages received in a single response from the server will now be split into individual messages
• Non 200 response will now be bubbled to the client
• Error Callback: All the error messages are routed to this callback channel
• Subscribe/Presence is under development for GO App engine. In the example we have demonstarted Subscribe and Presence using the PubNub JavaScript SDK

###Get Code

• Clone the PubNub Go repo using git clone https://github.com/pubnub/go.git

###Example

• Please see gae-example

###Running Unit tests (instructions for Mac/Linux, for other dev environments the instructions are similar)

• Open Terminal.
• Make sure that <go-workspace>/github.com/pubnub/go/gae/messaging is in the GOPATH.
• Change the directory to <Path-to-PubNub-GAE-Folder>github.com/pubnub/go/gae/tests
• Run the command goapp test.

###Use pubnub in your project

• Built using Eclipse IDE (Luna).
• Install golang plugin for Eclipse.
• Insatll Google App Engine SDK for Go.
• Clone https://github.com/pubnub/go.git
• Create a new folder for your project.
• Copy <pubnub-go-repo-clone-path>/github.com/pubnub/go/gae/messaging to your project maintaining the folder structure.
• Import github.com/pubnub/go/gae/messaging in your project.

import (
    // Other imports...
    "github.com/pubnub/go/gae/messaging"
)

• For the detailed usage of the PunNub API, please refer to the rest of the ReadMe
• The SDK has a dependency on Gorilla web toolkit, for sessions (http://www.gorillatoolkit.org). You need to download Gorilla web toolkit from the git repo using go get github.com/gorilla/sessions and copy it to github.com/gorilla/sessions in your project maintaining the folder structure

###Quick Implementation Examples

handleResult

This function is a utility function used in the examples below to handle the non Subscribe/Presence response. You will want to adapt it to your own needs.

func handleResult(c appengine.Context, w http.ResponseWriter, r *http.Request, uuid string, successChannel, errorChannel chan []byte, timeoutVal uint16, action string) {
	//c := appengine.NewContext(r)
	for {
		select {

		case success, ok := <-successChannel:
			if !ok {
				c.Infof("success!OK")
				break
			}
			if string(success) != "[]" {
				c.Infof("success:", string(success))
				sendResponseToChannel(w, string(success), r, uuid)
			}

			return
		case failure, ok := <-errorChannel:
			if !ok {
				c.Infof("fail1:", string("failure"))
				break
			}
			if string(failure) != "[]" {
				c.Infof("fail:", string(failure))
				sendResponseToChannel(w, string(failure), r, uuid)
			}
			return
		}
	}
}

Init

Initialize a new Pubnub instance.

        pubInstance := messaging.New(<AppEngine context>, <UUID>, <http.ResponseWriter>, <*http.Request>, <YOUR PUBLISH KEY>, <YOUR SUBSCRIBE KEY>, <SECRET KEY>, <CIPHER>, <SSL ON/OFF>, )

Publish

        //Init pubnub instance

        var errorChannel = make(chan []byte)
        var callbackChannel = make(chan []byte)
        go pubInstance.Publish(<AppEngine context>, <http.ResponseWriter>, <*http.Request>, <pubnub channel>, <message to publish>, callbackChannel, errorChannel)

        handleResult(<AppEngine context>, <http.ResponseWriter>, <*http.Request>, <UUID>, callbackChannel, errorChannel, messaging.GetNonSubscribeTimeout(), "Publish")

        // please goto the top of this file see the implementation of handleResult

Detailed History

        //Init pubnub instance

        var errorChannel = make(chan []byte)
        var channelCallback = make(chan []byte)
        go pubInstance.History(<AppEngine context>, <http.ResponseWriter>, <*http.Request>, <pubnub channel>, <no of items to fetch>, <start time>, <end time>, <Reverse>, channelCallback, errorChannel)
        //example: go _pub.History(<AppEngine context>, <http.ResponseWriter>, <*http.Request>, <pubnub channel>, 100, 0, 0, false, channelCallback, errorChannel)
        handleResult(<AppEngine context>, <http.ResponseWriter>, <*http.Request>, <UUID>, callbackChannel, errorChannel, messaging.GetNonSubscribeTimeout(), "Detailed History")
        // please goto the top of this file see the implementation of handleResult

Here_Now

        //Init pubnub instance

        var errorChannel = make(chan []byte)
        var channelCallback = make(chan []byte)
        go pubInstance.HereNow(<AppEngine context>, <http.ResponseWriter>, <*http.Request>, <pubnub channel>, disableUUID, includeUserState, channelCallback, errorChannel)
        handleResult(<AppEngine context>, <http.ResponseWriter>, <*http.Request>, <UUID>, callbackChannel, errorChannel, messaging.GetNonSubscribeTimeout(), "HereNow")
        // please goto the top of this file see the implementation of handleResult

Time

        //Init pubnub instance

        var errorChannel = make(chan []byte)
        var channelCallback = make(chan []byte)
        go pubInstance.GetTime(<AppEngine context>, <http.ResponseWriter>, <*http.Request>, channelCallback, errorChannel)
        handleResult(<AppEngine context>, <http.ResponseWriter>, <*http.Request>, <UUID>, channelCallback, errorChannel, messaging.GetNonSubscribeTimeout(), "Time")
        // please goto the top of this file see the implementation of handleResult

GrantSubscribe

        //Init pubnub instance

        var errorChannel = make(chan []byte)
        var channelCallback = make(chan []byte)
        go pubInstance.GrantSubscribe(<AppEngine context>, <http.ResponseWriter>, <*http.Request>, <pubnub channels>, true, true, 60, channelCallback, errorChannel)
        handleResult(<AppEngine context>, <http.ResponseWriter>, <*http.Request>, <UUID>, channelCallback, errorChannel, messaging.GetNonSubscribeTimeout(), "Grant Susbcribe")
        // please goto the top of this file see the implementation of handleResult

RevokeSubscribe

        //Init pubnub instance

        var errorChannel = make(chan []byte)
        var channelCallback = make(chan []byte)
        go pubInstance.GrantSubscribe(<AppEngine context>, <http.ResponseWriter>, <*http.Request>, <pubnub channels>, false, false, 1, channelCallback, errorChannel)
        handleResult(<AppEngine context>, <http.ResponseWriter>, <*http.Request>, <UUID>, channelCallback, errorChannel, messaging.GetNonSubscribeTimeout(), "Revoke Susbcribe")
        // please goto the top of this file see the implementation of handleResult

AuditSubscribe

        //Init pubnub instance

        var errorChannel = make(chan []byte)
        var channelCallback = make(chan []byte)
        go pub.AuditSubscribe(<AppEngine context>, <http.ResponseWriter>, <*http.Request>, <pubnub channels>, channelCallback, errorChannel)
        handleResult(<AppEngine context>, <http.ResponseWriter>, <*http.Request>, <UUID>, channelCallback, errorChannel, messaging.GetNonSubscribeTimeout(), "Audit Subscribe")
        // please goto the top of this file see the implementation of handleResult

GrantPresence

        //Init pubnub instance

        var errorChannel = make(chan []byte)
        var channelCallback = make(chan []byte)
        go pubInstance.GrantPresence(<AppEngine context>, <http.ResponseWriter>, <*http.Request>, <pubnub channels>, true, true, 60, channelCallback, errorChannel)
        handleResult(<AppEngine context>, <http.ResponseWriter>, <*http.Request>, <UUID>, channelCallback, errorChannel, messaging.GetNonSubscribeTimeout(), "Grant Presence")
        // please goto the top of this file see the implementation of handleResult

RevokePresence

        //Init pubnub instance

        var errorChannel = make(chan []byte)
        var channelCallback = make(chan []byte)
        go pubInstance.GrantPresence(<AppEngine context>, <http.ResponseWriter>, <*http.Request>, <pubnub channels>, false, false, 1, channelCallback, errorChannel)
        handleResult(<AppEngine context>, <http.ResponseWriter>, <*http.Request>, <UUID>, channelCallback, errorChannel, messaging.GetNonSubscribeTimeout(), "Revoke Presence")

        // please goto the top of this file see the implementation of handleResult

AuditPresence

        //Init pubnub instance

        var errorChannel = make(chan []byte)
        var channelCallback = make(chan []byte)
        go pub.AuditPresence(<AppEngine context>, <http.ResponseWriter>, <*http.Request>, <pubnub channels>, channelCallback, errorChannel)
        handleResult(<AppEngine context>, <http.ResponseWriter>, <*http.Request>, <UUID>, channelCallback, errorChannel, messaging.GetNonSubscribeTimeout(), "Audit Presence")
        // please goto the top of this file see the implementation of handleResult

SetAuthKey

        //Init pubnub instance

        pubInstance.SetAuthenticationKey(<AppEngine context>, <http.ResponseWriter>, <*http.Request>, authKey)

GetAuthKey

        //Init pubnub instance

        pubInstance.GetAuthenticationKey()

Set User State using Key-Pair

        //Init pubnub instance

        var errorChannel = make(chan []byte)
        var successChannel = make(chan []byte)
        go pubInstance.SetUserStateKeyVal(<AppEngine context>, <http.ResponseWriter>, <*http.Request>, <pubnub channel>, <key>, <val>, successChannel, errorChannel)
        handleResult(<AppEngine context>, <http.ResponseWriter>, <*http.Request>, <UUID>, successChannel, errorChannel, messaging.GetNonSubscribeTimeout(), "Set User State")
        // please goto the top of this file see the implementation of handleResult

Delete User State

        //Init pubnub instance

        var errorChannel = make(chan []byte)
        var successChannel = make(chan []byte)
        go pubInstance.SetUserStateKeyVal(<AppEngine context>, <http.ResponseWriter>, <*http.Request>, <pubnub channel>, <key>, "", successChannel, errorChannel)
        handleResult(<AppEngine context>, <http.ResponseWriter>, <*http.Request>, <UUID>, successChannel, errorChannel, messaging.GetNonSubscribeTimeout(), "Del User State")
        // please goto the top of this file see the implementation of handleResult

Set User State using JSON

        //Init pubnub instance

        var errorChannel = make(chan []byte)
        var successChannel = make(chan []byte)
        go pubInstance.SetUserStateJSON(<AppEngine context>, <http.ResponseWriter>, <*http.Request>, <pubnub channel>, <jsonString>, successChannel, errorChannel)
        handleResult(<AppEngine context>, <http.ResponseWriter>, <*http.Request>, <UUID>, successChannel, errorChannel, messaging.GetNonSubscribeTimeout(), "Set User State JSON")

        // please goto the top of this file see the implementation of handleResult

Get User State

        //Init pubnub instance

        var errorChannel = make(chan []byte)
        var successChannel = make(chan []byte)

        go pubInstance.GetUserState(<AppEngine context>, <http.ResponseWriter>, <*http.Request>, <pubnub channel>, successChannel, errorChannel)
        handleResult(<AppEngine context>, <http.ResponseWriter>, <*http.Request>, <UUID>, successChannel, errorChannel, messaging.GetNonSubscribeTimeout(), "Get User State")
        // please goto the top of this file see the implementation of handleResult

Where Now

        //Init pubnub instance

        var errorChannel = make(chan []byte)
        var successChannel = make(chan []byte)
        go pubInstance.WhereNow(<AppEngine context>, <http.ResponseWriter>, <*http.Request>, whereNowUUID, successChannel, errorChannel)
        handleResult(<AppEngine context>, <http.ResponseWriter>, <*http.Request>, <UUID>, successChannel, errorChannel, messaging.GetNonSubscribeTimeout(), "WhereNow")
        // please goto the top of this file see the implementation of handleResult

Global Here Now

        //Init pubnub instance

        var errorChannel = make(chan []byte)
        var successChannel = make(chan []byte)
        go pubInstance.GlobalHereNow(<AppEngine context>, <http.ResponseWriter>, <*http.Request>, disableUUID, includeUserState, successChannel, errorChannel)
        handleResult(<AppEngine context>, <http.ResponseWriter>, <*http.Request>, <UUID>, successChannel, errorChannel, messaging.GetNonSubscribeTimeout(), "Global Here Now")

        // please goto the top of this file see the implementation of handleResult

Contact support@pubnub.com for all questions