Parse the query and report lexer errors

diff --git a/search-tags.py b/search-tags.py
index cbac10c6bbdac3eee8d9b171667938976afdfeeb..9bdfc8bb5bc1e4cd6711e6f7f4caad5fe5bc464c 100755 (executable)
--- a/search-tags.py
+++ b/search-tags.py
@@ -6,8 +6,10 @@ __copyright__ = "Copyright (C) 2014 PhiloSoft Design"
 __license__ = "GNU GPL"
 
 import cgi
-from parse_query import parser
+from ply.lex import LexError
+
 from html.response import response
+from parser.parser import parser
 
 form = cgi.FieldStorage()
 if not form.has_key('q'):
@@ -15,4 +17,15 @@ if not form.has_key('q'):
     title = "Error!"
     body = "Required parameter is missing!"
 
+else:
+    q = form['q'].value
+    try:
+        tree = parser.parse(q)
+    except LexError:
+        tree = None
+    if tree is None:
+        status = "400 Bad request"
+        title = "Error!"
+        body = "Bad query syntax!"
+
 response(title, body, status)