chore: split out handler, added comment

pkg/decryption/decryption.go

@@ -62,10 +62,12 @@ func GuessKeySizes(data []byte) ([]int, error) {
 
 	// Loop through each possible key size from 2 to maxKeySize (inclusive).
 	for keySize := 2; keySize <= maxKeySize; keySize++ {
-		// Calculate the average Hamming distance for this key size.
+		// Skip keySize if keySize*4 exceeds the length of the data. Not able
+		// to make a meaningful comparison.
 		if keySize*4 > len(data) {
 			continue
 		}
+		// Calculate the average Hamming distance for this key size.
 		averageDistance, err := averageHammingDistance(data, keySize)
 		if err != nil {
 			return nil, fmt.Errorf("calculating average distance: %w", err)

pkg/handlers/handlerDecrypt.go

@@ -7,7 +7,6 @@ import (
 	"strings"
 
 	dc "github.com/nronzel/xoracle/pkg/decryption"
-	tmpls "github.com/nronzel/xoracle/templates"
 	"github.com/nronzel/xoracle/utils"
 )
 
@@ -71,17 +70,3 @@ func HandlerDecrypt(w http.ResponseWriter, r *http.Request) {
 	w.Header().Set("Content-Type", "text/html")
 	fmt.Fprint(w, responseHTML.String())
 }
-
-func HandlerRoot(w http.ResponseWriter, r *http.Request) {
-	tmpl, err := template.New("index").Parse(tmpls.IndexTemplate)
-	if err != nil {
-		w.Header().Set("Content-Type", "text-/plain")
-		http.Error(w, "failed to load template", http.StatusInternalServerError)
-		return
-	}
-	err = tmpl.Execute(w, nil)
-	if err != nil {
-		w.Header().Set("Content-Type", "text-/plain")
-		http.Error(w, "problem executing template", http.StatusInternalServerError)
-	}
-}

pkg/handlers/handlerRoot.go

@@ -0,0 +1,22 @@
+package handlers
+
+import (
+	"html/template"
+	"net/http"
+
+	tmpls "github.com/nronzel/xoracle/templates"
+)
+
+func HandlerRoot(w http.ResponseWriter, r *http.Request) {
+	tmpl, err := template.New("index").Parse(tmpls.IndexTemplate)
+	if err != nil {
+		w.Header().Set("Content-Type", "text-/plain")
+		http.Error(w, "failed to load template", http.StatusInternalServerError)
+		return
+	}
+	err = tmpl.Execute(w, nil)
+	if err != nil {
+		w.Header().Set("Content-Type", "text-/plain")
+		http.Error(w, "problem executing template", http.StatusInternalServerError)
+	}
+}