Make Status a type

Using a type is better than using an integer.

examples/client.go

@@ -102,7 +102,7 @@ func do(req *gemini.Request, via []*gemini.Request) (*gemini.Response, error) {
 		return resp, err
 	}
 
-	switch gemini.StatusClass(resp.Status) {
+	switch resp.Status.Class() {
 	case gemini.StatusInput:
 		input, ok := getInput(resp.Meta, resp.Status == gemini.StatusSensitiveInput)
 		if !ok {
@@ -155,7 +155,7 @@ func main() {
 	defer resp.Body.Close()
 
 	// Handle response
-	if gemini.StatusClass(resp.Status) == gemini.StatusSuccess {
+	if resp.Status.Class() == gemini.StatusSuccess {
 		body, err := io.ReadAll(resp.Body)
 		if err != nil {
 			log.Fatal(err)

handler.go

@@ -38,19 +38,19 @@ func (f HandlerFunc) ServeGemini(ctx context.Context, w ResponseWriter, r *Reque
 // RedirectHandler returns a request handler that redirects each request it
 // receives to the given url using the given status code.
 //
-// The provided code should be in the 3x range and is usually
+// The provided status code should be in the 3x range and is usually
 // StatusRedirect or StatusPermanentRedirect.
-func RedirectHandler(code int, url string) Handler {
-	return &redirectHandler{code, url}
+func RedirectHandler(status Status, url string) Handler {
+	return &redirectHandler{status, url}
 }
 
 type redirectHandler struct {
-	code int
-	url  string
+	status Status
+	url    string
 }
 
 func (h *redirectHandler) ServeGemini(ctx context.Context, w ResponseWriter, r *Request) {
-	w.WriteHeader(h.code, h.url)
+	w.WriteHeader(h.status, h.url)
 }
 
 // NotFound replies to the request with a Gemini 51 not found error.

response.go

@@ -18,7 +18,7 @@ const defaultMediaType = "text/gemini; charset=utf-8"
 // as the Body field is read.
 type Response struct {
 	// Status contains the response status code.
-	Status int
+	Status Status
 
 	// Meta contains more information related to the response status.
 	// For successful responses, Meta should contain the media type of the response.
@@ -57,7 +57,7 @@ func ReadResponse(rc io.ReadCloser) (*Response, error) {
 	if err != nil {
 		return nil, ErrInvalidResponse
 	}
-	resp.Status = status
+	resp.Status = Status(status)
 
 	// Read one space
 	if b, err := br.ReadByte(); err != nil {
@@ -77,7 +77,7 @@ func ReadResponse(rc io.ReadCloser) (*Response, error) {
 	if len(meta) > 1024 {
 		return nil, ErrInvalidResponse
 	}
-	if StatusClass(status) == StatusSuccess && meta == "" {
+	if resp.Status.Class() == StatusSuccess && meta == "" {
 		// Use default media type
 		meta = defaultMediaType
 	}
@@ -90,7 +90,7 @@ func ReadResponse(rc io.ReadCloser) (*Response, error) {
 		return nil, ErrInvalidResponse
 	}
 
-	if StatusClass(status) == StatusSuccess {
+	if resp.Status.Class() == StatusSuccess {
 		resp.Body = newReadCloserBody(br, rc)
 	} else {
 		resp.Body = nopReadCloser{}
@@ -186,7 +186,7 @@ type ResponseWriter interface {
 	// The provided code must be a valid Gemini status code.
 	// The provided meta must not be longer than 1024 bytes.
 	// Only one header may be written.
-	WriteHeader(status int, meta string)
+	WriteHeader(status Status, meta string)
 }
 
 // The Flusher interface is implemented by ResponseWriters that allow a
@@ -237,16 +237,16 @@ func (w *responseWriter) Write(b []byte) (int, error) {
 	return w.b.Write(b)
 }
 
-func (w *responseWriter) WriteHeader(status int, meta string) {
+func (w *responseWriter) WriteHeader(status Status, meta string) {
 	if w.wroteHeader {
 		return
 	}
 
-	if StatusClass(status) == StatusSuccess {
+	if status.Class() == StatusSuccess {
 		w.bodyAllowed = true
 	}
 
-	w.b.WriteString(strconv.Itoa(status))
+	w.b.WriteString(strconv.Itoa(int(status)))
 	w.b.WriteByte(' ')
 	w.b.WriteString(meta)
 	w.b.Write(crlf)

response_test.go

@@ -9,7 +9,7 @@ import (
 func TestReadWriteResponse(t *testing.T) {
 	tests := []struct {
 		Raw       string
-		Status    int
+		Status    Status
 		Meta      string
 		Body      string
 		Err       error

status.go

@@ -1,37 +1,40 @@
 package gemini
 
+// Status represents a Gemini status code.
+type Status int
+
 // Gemini status codes.
 const (
-	StatusInput                    = 10
-	StatusSensitiveInput           = 11
-	StatusSuccess                  = 20
-	StatusRedirect                 = 30
-	StatusPermanentRedirect        = 31
-	StatusTemporaryFailure         = 40
-	StatusServerUnavailable        = 41
-	StatusCGIError                 = 42
-	StatusProxyError               = 43
-	StatusSlowDown                 = 44
-	StatusPermanentFailure         = 50
-	StatusNotFound                 = 51
-	StatusGone                     = 52
-	StatusProxyRequestRefused      = 53
-	StatusBadRequest               = 59
-	StatusCertificateRequired      = 60
-	StatusCertificateNotAuthorized = 61
-	StatusCertificateNotValid      = 62
+	StatusInput                    Status = 10
+	StatusSensitiveInput           Status = 11
+	StatusSuccess                  Status = 20
+	StatusRedirect                 Status = 30
+	StatusPermanentRedirect        Status = 31
+	StatusTemporaryFailure         Status = 40
+	StatusServerUnavailable        Status = 41
+	StatusCGIError                 Status = 42
+	StatusProxyError               Status = 43
+	StatusSlowDown                 Status = 44
+	StatusPermanentFailure         Status = 50
+	StatusNotFound                 Status = 51
+	StatusGone                     Status = 52
+	StatusProxyRequestRefused      Status = 53
+	StatusBadRequest               Status = 59
+	StatusCertificateRequired      Status = 60
+	StatusCertificateNotAuthorized Status = 61
+	StatusCertificateNotValid      Status = 62
 )
 
-// StatusClass returns the status class for the provided status code.
+// Class returns the status class for the status code.
 // 1x becomes 10, 2x becomes 20, and so on.
-func StatusClass(code int) int {
-	return (code / 10) * 10
+func (s Status) Class() Status {
+	return (s / 10) * 10
 }
 
-// StatusText returns a text for the provided status code.
+// String returns a text for the status code.
 // It returns the empty string if the status code is unknown.
-func StatusText(code int) string {
-	switch code {
+func (s Status) String() string {
+	switch s {
 	case StatusInput:
 		return "Input"
 	case StatusSensitiveInput:

timeout.go

@@ -66,7 +66,7 @@ func (t *timeoutHandler) ServeGemini(ctx context.Context, w ResponseWriter, r *R
 type timeoutWriter struct {
 	mu          sync.Mutex
 	b           bytes.Buffer
-	status      int
+	status      Status
 	meta        string
 	mediatype   string
 	wroteHeader bool
@@ -91,7 +91,7 @@ func (w *timeoutWriter) Write(b []byte) (int, error) {
 	return w.b.Write(b)
 }
 
-func (w *timeoutWriter) WriteHeader(status int, meta string) {
+func (w *timeoutWriter) WriteHeader(status Status, meta string) {
 	w.mu.Lock()
 	defer w.mu.Unlock()
 	if w.timedOut {
@@ -100,7 +100,7 @@ func (w *timeoutWriter) WriteHeader(status int, meta string) {
 	w.writeHeaderLocked(status, meta)
 }
 
-func (w *timeoutWriter) writeHeaderLocked(status int, meta string) {
+func (w *timeoutWriter) writeHeaderLocked(status Status, meta string) {
 	if w.wroteHeader {
 		return
 	}