diff --git a/pywb/warcserver/index/cdxops.py b/pywb/warcserver/index/cdxops.py
index d04c1d96..29846ca9 100644
--- a/pywb/warcserver/index/cdxops.py
+++ b/pywb/warcserver/index/cdxops.py
@@ -157,6 +157,63 @@ def cdx_reverse(cdx_iter, limit):
         yield cdx
 
 
+#=================================================================
+class CDXFilter(object):
+    def __init__(self, string):
+        # invert filter
+        self.invert = string.startswith('!')
+        if self.invert:
+            string = string[1:]
+
+        # exact match
+        if string.startswith('='):
+            string = string[1:]
+            self.compare_func = self.exact
+        # contains match
+        elif string.startswith('~'):
+            string = string[1:]
+            self.compare_func = self.contains
+        else:
+            self.compare_func = self.rx_match
+
+        parts = string.split(':', 1)
+        # no field set, apply filter to entire cdx
+        if len(parts) == 1:
+            self.field = ''
+        # apply filter to cdx[field]
+        else:
+            self.field = parts[0]
+            self.field = CDXObject.CDX_ALT_FIELDS.get(self.field,
+                                                      self.field)
+            string = parts[1]
+
+        # make regex if regex mode
+        if self.compare_func == self.rx_match:
+            self.regex = re.compile(string)
+        else:
+            self.filter_str = string
+
+    def __call__(self, cdx):
+        if not self.field:
+            val = str(cdx)
+        else:
+            val = str(cdx.get(self.field, ''))
+
+        matched = self.compare_func(val)
+
+        return matched ^ self.invert
+
+    def exact(self, val):
+        return (self.filter_str == val)
+
+    def contains(self, val):
+        return (self.filter_str in val)
+
+    def rx_match(self, val):
+        res = self.regex.match(val)
+        return res is not None
+
+
 #=================================================================
 def cdx_filter(cdx_iter, filter_strings):
     """
@@ -167,63 +224,7 @@ def cdx_filter(cdx_iter, filter_strings):
     if isinstance(filter_strings, str):
         filter_strings = [filter_strings]
 
-    filters = []
-
-    class Filter:
-        def __init__(self, string):
-            # invert filter
-            self.invert = string.startswith('!')
-            if self.invert:
-                string = string[1:]
-
-            # exact match
-            if string.startswith('='):
-                string = string[1:]
-                self.compare_func = self.exact
-            # contains match
-            elif string.startswith('~'):
-                string = string[1:]
-                self.compare_func = self.contains
-            else:
-                self.compare_func = self.regex
-
-            parts = string.split(':', 1)
-            # no field set, apply filter to entire cdx
-            if len(parts) == 1:
-                self.field = ''
-            # apply filter to cdx[field]
-            else:
-                self.field = parts[0]
-                self.field = CDXObject.CDX_ALT_FIELDS.get(self.field,
-                                                          self.field)
-                string = parts[1]
-
-            # make regex if regex mode
-            if self.compare_func == self.regex:
-                self.regex = re.compile(string)
-            else:
-                self.filter_str = string
-
-        def __call__(self, cdx):
-            if not self.field:
-                val = str(cdx)
-            else:
-                val = cdx.get(self.field, '')
-
-            matched = self.compare_func(val)
-
-            return matched ^ self.invert
-
-        def exact(self, val):
-            return (self.filter_str == val)
-
-        def contains(self, val):
-            return (self.filter_str in val)
-
-        def regex(self, val):
-            return self.regex.match(val) is not None
-
-    filters = list(map(Filter, filter_strings))
+    filters = [CDXFilter(filter_str) for filter_str in filter_strings]
 
     for cdx in cdx_iter:
         if all(x(cdx) for x in filters):
diff --git a/pywb/warcserver/index/indexsource.py b/pywb/warcserver/index/indexsource.py
index cb3a0951..aecc2489 100644
--- a/pywb/warcserver/index/indexsource.py
+++ b/pywb/warcserver/index/indexsource.py
@@ -193,19 +193,38 @@ class RemoteIndexSource(BaseIndexSource):
 class LiveIndexSource(BaseIndexSource):
     def __init__(self, proxy_url='{url}'):
         self.proxy_url = proxy_url
+        self._init_sesh()
 
     def load_index(self, params):
+        # no fuzzy match for live resources
+        if params.get('is_fuzzy'):
+            raise NotFoundException(params['url'] + '*')
+
         cdx = CDXObject()
         cdx['urlkey'] = params.get('key').decode('utf-8')
         cdx['timestamp'] = timestamp_now()
         cdx['url'] = params['url']
         cdx['load_url'] = res_template(self.proxy_url, params)
         cdx['is_live'] = 'true'
-        cdx['mime'] = params.get('content_type', '')
-        def live():
-            yield cdx
 
-        return live()
+        mime = params.get('content_type', '')
+
+        if params.get('filter') and not mime:
+            try:
+                res = self.sesh.head(cdx['url'])
+                if res.status_code != 405:
+                    cdx['status'] = str(res.status_code)
+
+                content_type = res.headers.get('Content-Type')
+                if content_type:
+                    mime = content_type.split(';')[0]
+
+            except Exception as e:
+                pass
+
+        cdx['mime'] = mime
+
+        return iter([cdx])
 
     def __repr__(self):
         return '{0}()'.format(self.__class__.__name__)
@@ -383,11 +402,16 @@ class MementoIndexSource(BaseIndexSource):
     def handle_timemap(self, params):
         url = res_template(self.timemap_url, params)
         headers = self._get_headers(params)
-        res = self.sesh.get(url,
-                            headers=headers,
-                            timeout=params.get('_timeout'))
+        try:
+            res = self.sesh.get(url,
+                                headers=headers,
+                                timeout=params.get('_timeout'))
 
-        if res.status_code >= 400 or not res.text:
+            res.raise_for_status()
+            assert(res.text)
+
+        except Exception as e:
+            print('FAILED: ' + str(e))
             raise NotFoundException(url)
 
         links = res.text