Fix url input and mark it as required

Validation is done in html on the client
and raises an error 400 in the api.

This fixes #2.

schort.py

@@ -38,6 +38,8 @@ def short(shortLink=""):
 	elif request.method == "POST": # Someone submitted a new link to short
 		longUrl = request.form["url"] # required, accept the exception if the key does not exist
 		wishId = request.form.get("wishId")
+		if len(longUrl) <= 0:
+			abort(400)
 		databaseId = insertIdUnique(longUrl, idToCheck=wishId)
 		return request.url_root + databaseId # Short link in plain text
 

templates/index.html

@@ -12,7 +12,7 @@
 			</div>
 			<form action="/" method="post" id="short_form">
 				<span id="url_text">URL:</span>
-				<input type="input" name="url" id="url_input">
+				<input type="url" name="url" id="url_input" required>
 				<input type="hidden" name="wishId" value="{{name}}">
 				<input type="submit" value="Schort!" id="short_button">
 			</form>