diff --git a/python/web/library/fileformat.py b/python/web/library/fileformat.py
index 2906f98..8825164 100644
--- a/python/web/library/fileformat.py
+++ b/python/web/library/fileformat.py
@@ -54,6 +54,22 @@ action_fields = {
 class CommitFormatSyntaxError(Exception):
     pass
 
+def read_field_value_str(val):
+    return '\n'.join(map(lambda x: x.strip(), val.split('\n'))).strip()
+
+def read_field_value_dict(val):
+    d = {}
+    for line in val.strip().split('\n'):
+        key, value = line.strip().split(' ', 1)
+        if key in d:
+            d[key].append(value)
+        else:
+            d[key] = [value]
+    return d
+
+def read_field_value_list(val):
+    return val.strip().split(' ')
+
 def read_action(lines):
     d = {}
     lastfield = None
@@ -66,11 +82,27 @@ def read_action(lines):
             d[lastfield] = d[lastfield] + '\n' + line.strip()
         else:
             field, value = line.split(':', 1)
-            # reader = { 's': read_field_value_str,
-            #            'd': read_field_value_dict,
-            #            'l': read_field_value_list }[
-            # translated_value = 
-            # TODO skriv ferdig
+            d[field] = value.strip()
+            lastfield = field
+    if 'action' not in d:
+        raise CommitFormatSyntaxError('Missing \'action\' field')
+    action = d['action']
+    for field in action_fields[action]['required']:
+        if field not in d:
+            raise CommitFormatSyntaxError('Missing required field \'%s\' in \'%s\' action' % (field, action))
+    data_type = action_fields[action]['type']
+    result = { 'action': action }
+    for field, ftype in fields[data_type]:
+        if field in d:
+            reader = { 's': read_field_value_str,
+                       'd': read_field_value_dict,
+                       'l': read_field_value_list }[ftype]
+            result[field] = reader(d[field])
+    return result
+
+def read_actionlist(text):
+    return map(lambda x: read_action(x.strip().split('\n')),
+               text.split('\n\n'))
 
 def write_field_value_str(val):
     lines = ''