--- a/farol/main.py	Tue Sep 30 15:12:25 2014 +0200
+++ b/farol/main.py	Tue Sep 30 16:23:03 2014 +0200
@@ -25,6 +25,8 @@
 import os
 import logging
 from logging import FileHandler
+import urllib2
+from xml.etree import ElementTree as ET
 
 import farolluz
 from farolluz.cvrf import CVRF, ValidationError
@@ -86,8 +88,49 @@
 def welcome():
     return render_template('welcome.j2')
 
-def parse_url(url):
-    set_current(parse(urlopen(url).read()))
+def set_url(url):
+    try: content = urlopen(url).read()
+    except urllib2.HTTPError as e:
+        flash('Unable to retrieve %s: %s' % (url, e))
+        return
+    try: doc = parse(content)
+    except ET.ParseError as e:
+        flash('Unable to parse %s: %s' % (url, e))
+        return
+    set_current(doc)
+
+def set_RHSA(id_):
+    # validate input
+    if ':' not in id_:
+        flash('Wrong RHSA id: %s' % id_)
+        return
+    year, index = id_.split(':', 1)
+    try:
+        int(year)
+        int(index)
+    except ValueError:
+        flash('Wrong RHSA id: %s' % id_)
+        return
+    # Process it
+    set_url("https://www.redhat.com/security/data/cvrf/%(year)s/cvrf-rhsa-%(year)s-%(index)s.xml" % {'year': year, 'index': index})
+
+def set_oracle(id_):
+    try: int(id_)
+    except ValueError:
+        flash('Wrong Oracle id: %s' % id_)
+        return
+    set_url("http://www.oracle.com/ocom/groups/public/@otn/documents/webcontent/%s.xml" % id_)
+
+def set_cisco(id_):
+    if id_.count('-') < 2:
+        flash('Wrong cisco id: %s' % id_)
+        return
+    kind, date, name = id_.split('-', 2)
+    try: kind = {'sa': 'Advisory', 'sr': 'Response'}[kind]
+    except KeyError:
+        flash('Wrong cisco id: %s' % id_)
+        return
+    set_url("http://tools.cisco.com/security/center/contentxml/CiscoSecurity%(kind)s/cisco-%(id)s/cvrf/cisco-%(id)s_cvrf.xml" % {'kind': kind, 'id': id_})
 
 @app.route('/new', methods=['GET', 'POST'])
 def new():
@@ -95,19 +138,16 @@
         return render_template('new.j2', has_document=has_current(), now=utcnow())
 
     if 'rhsa' in request.form:
-        year, index = request.form['id'].split(':')
-        parse_url("https://www.redhat.com/security/data/cvrf/%(year)s/cvrf-rhsa-%(year)s-%(index)s.xml" % {'year': year, 'index': index})
+        set_RHSA(request.form['id'])
     elif 'oracle' in request.form:
-        parse_url("http://www.oracle.com/ocom/groups/public/@otn/documents/webcontent/%s.xml" % request.form['id'])
+        set_oracle(request.form['id'])
     elif 'cisco' in request.form:
-        kind, date, name = request.form['id'].split('-', 2)
-        kind = {'sa': 'Advisory', 'sr': 'Response'}[kind]
-        parse_url("http://tools.cisco.com/security/center/contentxml/CiscoSecurity%(kind)s/cisco-%(id)s/cvrf/cisco-%(id)s_cvrf.xml" % {'kind': kind, 'id': request.form['id']})
+        set_cisco(request.form['id'])
     elif 'nasl' in request.form:
         flash("I'm not able to parse NASL scripts yet", 'danger')
         return redirect(url_for('new'))
     elif 'url' in request.form:
-        parse_url(request.form['url'])
+        set_url(request.form['url'])
     elif 'local' in request.files:
         upload = request.files['local']
         if not upload.filename.endswith('.xml'):