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main.go
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main.go
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package main
import (
"encoding/json"
"log"
"net/http"
"strconv"
)
const (
fizz = "fizz"
buzz = "buzz"
)
func main() {
http.HandleFunc("/fizzbuzz", quoteHandler)
err := http.ListenAndServe(":8080", nil);
if err != nil {
log.Fatal(err)
}
}
func quoteHandler(w http.ResponseWriter, r *http.Request) {
if r.URL.Path != "/fizzbuzz" {
http.Error(w, "404 not found.", http.StatusNotFound)
return
}
keys, ok := r.URL.Query()["count"]
if !ok || len(keys) == 0 {
http.Error(w, "400 bad request.", http.StatusBadRequest)
return
}
if r.Method == http.MethodGet {
count, err := strconv.Atoi(keys[0])
if err != nil {
log.Fatal(err)
}
answer := fizzBuzz(count)
output, err := json.Marshal(answer)
if err != nil {
log.Fatal(err)
}
w.Header().Set("content-type", "application/json")
_, err = w.Write(output)
if err != nil {
log.Fatal(err)
}
} else {
http.Error(w, "501 not implemented.", http.StatusNotImplemented)
return
}
}
func fizzBuzz(count int) FizzBuzz {
var slice []string
for i := 1; i <= count; i++ {
if i%3 == 0 {
slice = append(slice, fizz)
} else if i%5 == 0 {
slice = append(slice, buzz)
} else {
slice = append(slice, strconv.Itoa(i))
}
}
return FizzBuzz{
Fizzbuzz: slice,
}
}