First :D

plugins/validate.py

@@ -0,0 +1,25 @@
+'''
+Runs a given url through the w3c validator
+
+by Vladi
+'''
+
+from util import hook, http
+
+
+@hook.command
+def validate(inp):
+    ".validate <url> -- runs url through w3c markup validator"
+
+    if not inp.startswith('http://'):
+        inp = 'http://' + inp
+
+    url = 'http://validator.w3.org/check?uri=' + http.quote_plus(inp)
+    info = dict(http.open(url).info())
+
+    status = info['x-w3c-validator-status'].lower()
+    if status in ("valid", "invalid"):
+        errorcount = info['x-w3c-validator-errors']
+        warningcount = info['x-w3c-validator-warnings']
+        return "%s was found to be %s with %s errors and %s warnings." \
+                " see: %s" % (inp, status, errorcount, warningcount, url)