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wuclient.go
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wuclient.go
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//
// Weather proxy listens to weather server which is constantly
// emitting weather data
// Binds SUB socket to tcp://127.0.0.1:5556
//
// Usage : go run examples/wuclient.go 87654
package main
import (
"fmt"
"os"
"strconv"
"strings"
czmq "github.com/Shnitzelil/goczmq/v5"
)
func main() {
pubEndpoint := "tcp://127.0.0.1:5556"
totalTemperature := 0
filter := "59937"
if len(os.Args) > 1 {
filter = string(os.Args[1])
}
subSock, err := czmq.NewSub(pubEndpoint, filter)
if err != nil {
panic(err)
}
defer subSock.Destroy()
fmt.Printf("Collecting updates from weather server for %s…\n", filter)
subSock.Connect(pubEndpoint)
for i := 0; i < 100; i++ {
msg, _, err := subSock.RecvFrame()
if err != nil {
panic(err)
}
weatherData := strings.Split(string(msg), " ")
temperature, err := strconv.ParseInt(weatherData[1], 10, 64)
if err == nil {
totalTemperature += int(temperature)
}
}
fmt.Printf("Average temperature for zipcode %s was %dF \n\n", filter,
totalTemperature/100)
}