begin to develop support for getting station names

* new query: query which contains the wished server script to call
* query can contain 'haltestelle.do' or 'abfahrten.do'
* all other values are rejected and answered with empty array

scripts/abfahrtsmonitor.py

@@ -9,6 +9,8 @@ import urllib2
 # get cgi object
 form = cgi.FieldStorage()
 
+url = "http://widgets.vvo-online.de/abfahrtsmonitor/"
+querytype = ""
 ort = ""
 hst = ""
 vz = ""
@@ -16,17 +18,21 @@ vm = ""
 timestamp = ""
 
 # check for queries
+if (form.getvalue('query')):
+    query = form.getvalue('query')
 if (form.getvalue('ort')):
     ort = form.getvalue('ort')
 if (form.getvalue('hst')):
     hst = form.getvalue('hst')
 if (form.getvalue('vz')):
     vz = form.getvalue('vz')
-if (form.getvalue('vz')):
-    vm = form.getvalue('vz')
+if (form.getvalue('vm')):
+    vm = form.getvalue('vm')
 if (form.getvalue('timestamp')):
     timestamp = form.getvalue('timestamp')
 
+validqueries = ["haltestelle.do", "abfahrten.do"]
+
 queries = {
     "ort": ort,
     "hst": hst,
@@ -35,8 +41,11 @@ queries = {
     "timestamp": timestamp
 }
 
-url = "http://widgets.vvo-online.de/abfahrtsmonitor/Abfahrten.do?" + urllib.urlencode(queries)
-data = urllib2.urlopen(url).read()
+if (query in validqueries):
+    url += query + "?" + urllib.urlencode(queries)
+    data = urllib2.urlopen(url).read()
+else:
+    data = "[]"
 
 print("Content-type: text/html\n\n")
 print(data)