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pubsubclient.go
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pubsubclient.go
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package adversarylab
import (
"fmt"
"github.com/ugorji/go/codec"
"github.com/go-mangos/mangos"
"github.com/go-mangos/mangos/protocol/sub"
"github.com/go-mangos/mangos/transport/tcp"
)
type PubsubClient struct {
sock mangos.Socket
Rules chan Rule
}
func PubsubConnect(url string) PubsubClient {
var sock mangos.Socket
var err error
if sock, err = sub.NewSocket(); err != nil {
die("can't get new req socket: %s", err.Error())
}
sock.AddTransport(tcp.NewTransport())
if err = sock.Dial(url); err != nil {
die("can't dial on req socket: %s", err.Error())
}
err = sock.SetOption(mangos.OptionSubscribe, []byte(""))
if err != nil {
die("cannot subscribe: %s", err.Error())
}
rules := make(chan Rule)
go pump(sock, rules)
return PubsubClient{
sock: sock,
Rules: rules,
}
}
func pump(sock mangos.Socket, rules chan Rule) {
var err error
var msg []byte
for {
msg, err = sock.Recv()
if err != nil {
fmt.Println("Error reading subscription", err)
return
}
var value = NamedType{}
var h = NamedTypeHandle()
var dec = codec.NewDecoderBytes(msg, h)
var err = dec.Decode(&value)
if err != nil {
fmt.Println("Failed to decode")
fmt.Println(err.Error())
continue
}
switch value.Name {
case "adversarylab.Rule":
rule := RuleFromMap(value.Value.(map[interface{}]interface{}))
rules <- rule
default:
fmt.Println("Unknown request type")
fmt.Println(value)
}
}
}