Bayeux Client Protocol implemented in Golang (as specified by Salesforce Realtime API)

Fork from zph/bayeux:

Changes to accept both 'payload' and 'sobject'.
All the channels (user-created or generic) should be accepted.
Make it so user will pass chan from main function then they can close it anytime.
User can mention replay mechanism from Channel method.

See examples/main.go

package main

import (
	"fmt"

	bay "github.com/elastic/bayeux"
)

func Example() {
	out := make(chan bay.TriggerEvent)
	b := bay.Bayeux{}
	creds := bay.GetSalesforceCredentials()
	replay := "-1"
	c := b.Channel(out, replay, creds, "channel")
	for {
		select {
		case e := <-c:
			fmt.Printf("TriggerEvent Received: %+v", e)
		}
	}
}

func main() {
	Example()
}

See annotations in code for cases where the Salesforce implementation of Bayeux seems to differ from official spec.

Salesforce documentation on Realtime API: https://resources.docs.salesforce.com/sfdc/pdf/api_streaming.pdf

This code or variant thereof has been steadily running in production since Nov 2016.

The API is very new. So only a few functions are exposed publicly and these can be expected to remain stable until 12/2018, pending massive changes to Salesforce API. Reasonable attempts will be made to maintain API past that deadline.