/
survey.go
100 lines (78 loc) · 2.19 KB
/
survey.go
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//Package survey supports the implementation of a survey server.
package survey
import (
"github.com/go-mangos/mangos"
"github.com/go-mangos/mangos/protocol/surveyor"
"github.com/go-mangos/mangos/transport/ipc"
"github.com/go-mangos/mangos/transport/tcp"
"log"
"time"
)
type Server struct {
url string
sock mangos.Socket
surveySent chan string
}
type ResponseHandler func([]byte)
//Starts a Survey on the specified url for a specified duration for clients to repsond. A set of workers can run to handle more traffic.
func (self *Server) Listen(url string, ms time.Duration, workers int, handler ResponseHandler) error {
self.url = url
self.surveySent = make(chan string)
var err error
if self.sock, err = surveyor.NewSocket(); err != nil {
return err
}
self.sock.AddTransport(ipc.NewTransport())
self.sock.AddTransport(tcp.NewTransport())
if err = self.sock.Listen(url); err != nil {
return err
}
err = self.sock.SetOption(mangos.OptionSurveyTime, time.Millisecond*ms)
if err != nil {
return err
}
for id := 0; id < workers; id++ {
go self.processData(handler)
}
return nil
}
//Send the survey question to clients and set a channel of slice messages to process.
func (self *Server) Send(payload []byte) error {
var err error
if err = self.sock.Send(payload); err != nil {
return err
}
self.surveySent <- "Survey Sent"
return nil
}
//Handles the survey responses.
func (self *Server) processData(handler ResponseHandler) {
var msg []byte
var err error
//Wait for a survey to be sent
s := <-self.surveySent
log.Println(s)
for {
if msg, err = self.sock.Recv(); err != nil {
continue
}
go handler(msg)
}
}
// var src = rand.NewSource(time.Now().UnixNano())
// func RandStringBytesMaskImprSrc(n int) string {
// b := make([]byte, n)
// // A src.Int63() generates 63 random bits, enough for letterIdxMax characters!
// for i, cache, remain := n-1, src.Int63(), letterIdxMax; i >= 0; {
// if remain == 0 {
// cache, remain = src.Int63(), letterIdxMax
// }
// if idx := int(cache & letterIdxMask); idx < len(letterBytes) {
// b[i] = letterBytes[idx]
// i--
// }
// cache >>= letterIdxBits
// remain--
// }
// return string(b)
// }