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package main
import (
"fmt"
"log"
"net/http"
"strconv"
)
const (
minDutyCycle = 0.0
maxDutyCycle = 100.0
)
type DutyCycle float32
type DutyCycleHandler struct {
dc Record[DutyCycle]
}
func (h DutyCycleHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
log.Println(r.Method, r.URL)
if r.Method != http.MethodPost {
w.WriteHeader(http.StatusMethodNotAllowed)
fmt.Fprintf(w, "invalid method: '%s'", r.Method)
return
}
dc, err := strconv.ParseFloat(r.URL.RawQuery, 32)
if err != nil || !isValidDutyCycle(dc) {
badRequest(w, "invalid duty cycle: '%s'", r.URL.RawQuery)
return
}
h.dc.put <- DutyCycle(dc)
}
func isValidDutyCycle(dc float64) bool {
return dc >= minDutyCycle && dc <= maxDutyCycle
}
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