58 lines
1.5 KiB
Go
58 lines
1.5 KiB
Go
package functions
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import (
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"fmt"
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"net/http"
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"strconv"
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)
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func HttpAbort(w http.ResponseWriter, code int, message string) {
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w.WriteHeader(code)
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fmt.Fprint(w, message)
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}
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func MyFibonacci(count int) (fibonaccivalue int) {
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fibonaccivalue = 1
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var prev_fibonacci int = 0
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for i := 1; i < count; i++ {
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fibonaccivalue += prev_fibonacci
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prev_fibonacci = fibonaccivalue - prev_fibonacci
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}
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return
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}
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func HttFibonacci(w http.ResponseWriter, request *http.Request) {
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switch request.Method {
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case "POST":
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error := request.ParseForm()
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if error != nil {
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fmt.Printf("Error parsing POST request: %s\n", error)
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HttpAbort(w, http.StatusUnprocessableEntity,
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"Unable to parse your POST request.\n")
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} else {
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s_seq := request.Form.Get("seq")
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seq, error := strconv.Atoi(s_seq)
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if error != nil {
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fmt.Printf("Error parsing integer value out of %s: %s\n",
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s_seq,
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error)
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HttpAbort(w, http.StatusExpectationFailed,
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fmt.Sprintf("[%s] is not a number.\n", s_seq))
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} else if seq < 1 {
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fmt.Printf("Invalid sequence number: %d\n", seq)
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HttpAbort(w, http.StatusBadRequest,
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"Please provide a positive integer as the sequence number.\n")
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} else {
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fmt.Printf("Received request for Fibonacci Sequence Number %d\n",
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seq)
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fmt.Fprintf(w, "Fibonacci sequence index [%d]: %d\n",
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seq, MyFibonacci(seq))
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}
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}
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default:
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HttpAbort(w, http.StatusMethodNotAllowed,
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fmt.Sprintf("Operation %s not implemented for this URL", request.Method))
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}
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}
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