create func for link creation to shorten code

also, fixed spelling error in index.html

index.html

@@ -36,7 +36,7 @@ A Minimal, SQLite-Backed URL Shortener
 |  $ curl -d https://duckduckgo.com {{.URL}}/ddg
 |   {{.URL}}/ddg
 |
-| 3. Create a short link to https://duckduckgo.com uaing a query string
+| 3. Create a short link to https://duckduckgo.com using a query string
 |   $ curl {{.URL}}?https://duckduckgo.com
 |   {{.URL}}/1acd382417199d7e
 |

main.go

@@ -166,17 +166,7 @@ func (c controller) Err(rw http.ResponseWriter, r *http.Request, err error) {
 	fmt.Fprintf(rw, "%s", err)
 }
 
-func (c controller) ServeHTTP(rw http.ResponseWriter, r *http.Request) {
+func (c controller) CreateShortLink(rw http.ResponseWriter, r *http.Request, rq string) {
-	switch r.Method {
-
-	case http.MethodGet:
-        st := strings.TrimRight(r.URL.Path, "/")
-        rq, err := url.QueryUnescape(r.URL.RawQuery)
-        if err != nil {
-            c.Err(rw, r, err)
-            return
-        }
-        if rq != "" {
     u, err := url.Parse(rq)
     if err != nil {
         c.Err(rw, r, err)
@@ -205,6 +195,21 @@ func (c controller) ServeHTTP(rw http.ResponseWriter, r *http.Request) {
     rw.WriteHeader(http.StatusFound)
     fmt.Fprintf(rw, "%s/%s", c.url, link.Smol)
     return
+}
+
+func (c controller) ServeHTTP(rw http.ResponseWriter, r *http.Request) {
+	switch r.Method {
+
+	case http.MethodGet:
+        st := strings.TrimRight(r.URL.Path, "/")
+        rq, err := url.QueryUnescape(r.URL.RawQuery)
+        if err != nil {
+            c.Err(rw, r, err)
+            return
+        }
+        if rq != "" {
+            c.CreateShortLink(rw, r, rq)
+            return
         } else {
             switch st {
 
@@ -242,33 +247,7 @@ func (c controller) ServeHTTP(rw http.ResponseWriter, r *http.Request) {
 			c.Err(rw, r, err)
 			return
 		}
-		u, err := url.Parse(string(b))
+        c.CreateShortLink(rw, r, string(b))
-		if err != nil {
-			c.Err(rw, r, err)
-			return
-		}
-		if u.Scheme != "http" && u.Scheme != "https" {
-			rw.WriteHeader(http.StatusBadRequest)
-			fmt.Fprintf(rw, "URL must contain scheme, e.g. `http://` or `https://`.")
-			return
-		}
-		var (
-			link Link
-			h    = strings.Trim(r.URL.Path, "/")
-		)
-		if h != "" {
-			link, err = c.db.NewLinkWithShortLink(u, h)
-
-		} else {
-			link, err = c.db.NewLink(u)
-		}
-		if err != nil {
-			c.Err(rw, r, err)
-			return
-		}
-		rw.Header().Set("X-Delete-With", link.Del)
-		rw.WriteHeader(http.StatusFound)
-		fmt.Fprintf(rw, "%s/%s", c.url, link.Smol)
         return
 
 	case http.MethodDelete: