diff --git a/pywb/cdx/cdxdomainspecific.py b/pywb/cdx/cdxdomainspecific.py
index a9e06778..006dd88d 100644
--- a/pywb/cdx/cdxdomainspecific.py
+++ b/pywb/cdx/cdxdomainspecific.py
@@ -5,11 +5,11 @@ import pkgutil
 
 from pywb.utils.dsrules import BaseRule, RuleSet
 
-from canonicalize import unsurt, UrlCanonicalizer
+from pywb.utils.canonicalize import unsurt, UrlCanonicalizer
 
 
 #=================================================================
-def load_domain_specific_cdx_rules(filename, surt_ordered):
+def load_domain_specific_cdx_rules(ds_rules_file, surt_ordered):
     #fh = pkgutil.get_data(__package__, filename)
     #config = yaml.load(fh)
 
@@ -17,7 +17,8 @@ def load_domain_specific_cdx_rules(filename, surt_ordered):
     fuzzy = None
 
     # Load Canonicalizer Rules
-    rules = RuleSet(CDXDomainSpecificRule, 'canonicalize')
+    rules = RuleSet(CDXDomainSpecificRule, 'canonicalize',
+                    ds_rules_file=ds_rules_file)
 
     if not surt_ordered:
         for rule in rules:
@@ -27,7 +28,8 @@ def load_domain_specific_cdx_rules(filename, surt_ordered):
         canon = CustomUrlCanonicalizer(rules, surt_ordered)
 
     # Load Fuzzy Lookup Rules
-    rules = RuleSet(CDXDomainSpecificRule, 'fuzzy_lookup')
+    rules = RuleSet(CDXDomainSpecificRule, 'fuzzy_lookup',
+                    ds_rules_file=ds_rules_file)
 
     if not surt_ordered:
         for rule in rules:
diff --git a/pywb/cdx/cdxserver.py b/pywb/cdx/cdxserver.py
index 1a68f7e4..7f548ec4 100644
--- a/pywb/cdx/cdxserver.py
+++ b/pywb/cdx/cdxserver.py
@@ -1,4 +1,4 @@
-from canonicalize import UrlCanonicalizer, calc_search_range
+from pywb.utils.canonicalize import UrlCanonicalizer, calc_search_range
 
 from cdxops import cdx_load
 from cdxsource import CDXSource, CDXFile, RemoteCDXSource, RedisCDXSource
@@ -17,13 +17,13 @@ import urlparse
 #=================================================================
 class BaseCDXServer(object):
     def __init__(self, **kwargs):
-        ds_rules = kwargs.get('ds_rules')
+        ds_rules_file = kwargs.get('ds_rules_file')
         surt_ordered = kwargs.get('surt_ordered', True)
 
         # load from domain-specific rules
-        if ds_rules:
+        if ds_rules_file:
             self.url_canon, self.fuzzy_query = (
-                load_domain_specific_cdx_rules(ds_rules, surt_ordered))
+                load_domain_specific_cdx_rules(ds_rules_file, surt_ordered))
         # or custom passed in canonicalizer
         else:
             self.url_canon = kwargs.get('url_canon')
@@ -166,7 +166,7 @@ def create_cdx_server(config, ds_rules_file=None):
     return server_cls(paths,
                       config=pass_config,
                       surt_ordered=surt_ordered,
-                      ds_rules=ds_rules_file,
+                      ds_rules_file=ds_rules_file,
                       perms_checker=perms_checker)
 
 
diff --git a/pywb/config_utils.py b/pywb/config_utils.py
index 672e8735..05844a2e 100644
--- a/pywb/config_utils.py
+++ b/pywb/config_utils.py
@@ -18,17 +18,19 @@ def load_template_file(file, desc = None, view_class = views.J2TemplateView):
     return file
 
 #=================================================================
-def create_wb_handler(cdx_server, config):
+def create_wb_handler(cdx_server, config, ds_rules_file=None):
 
     record_loader = ArcWarcRecordLoader(cookie_maker = config.get('cookie_maker'))
     paths = config.get('archive_paths')
 
-    resolving_loader = ResolvingLoader(paths = paths, cdx_server = cdx_server, record_loader = record_loader)
+    resolving_loader = ResolvingLoader(paths=paths,
+                                       cdx_server=cdx_server,
+                                       record_loader=record_loader)
 
     replayer = replay_views.ReplayView(
         content_loader = resolving_loader,
 
-        content_rewriter = RewriteContent(),
+        content_rewriter = RewriteContent(ds_rules_file=ds_rules_file),
 
         head_insert_view = load_template_file(config.get('head_insert_html'), 'Head Insert'),
 
diff --git a/pywb/pywb_init.py b/pywb/pywb_init.py
index be4bdded..bd63bfd5 100644
--- a/pywb/pywb_init.py
+++ b/pywb/pywb_init.py
@@ -57,12 +57,13 @@ def pywb_config_manual(passed_config = {}):
 
         route_config = DictChain(value, config)
 
-        ds_rules = route_config.get('domain_specific_rules', None)
-        cdx_server = IndexReader(route_config, ds_rules)
+        ds_rules_file = route_config.get('domain_specific_rules', None)
+        cdx_server = IndexReader(route_config, ds_rules_file)
 
         wb_handler = config_utils.create_wb_handler(
-            cdx_server = cdx_server,
-            config = route_config,
+            cdx_server=cdx_server,
+            config=route_config,
+            ds_rules_file=ds_rules_file,
         )
 
         logging.debug('Adding Collection: ' + name)
diff --git a/pywb/replay_views.py b/pywb/replay_views.py
index 4c6907eb..9113ad5f 100644
--- a/pywb/replay_views.py
+++ b/pywb/replay_views.py
@@ -7,6 +7,7 @@ from wbrequestresponse import WbResponse
 from wbexceptions import CaptureException, InternalRedirect
 from pywb.warc.recordloader import ArchiveLoadFailed
 
+
 #=================================================================
 class ReplayView:
     def __init__(self, content_loader, content_rewriter, head_insert_view = None,
@@ -99,20 +100,34 @@ class ReplayView:
     def rewrite_content(self, wbrequest, cdx, status_headers, stream):
         urlrewriter = wbrequest.urlrewriter
 
-        (rewritten_headers, stream) = self.content_rewriter.rewrite_headers(urlrewriter, status_headers, stream)
+        result = self.content_rewriter.rewrite_headers(urlrewriter,
+                                                       status_headers,
+                                                       stream,
+                                                       cdx['urlkey'])
+        (rewritten_headers, stream) = result
 
         # no rewriting needed!
         if rewritten_headers.text_type is None:
             response_iter = self.stream_to_iter(stream)
             return WbResponse(rewritten_headers.status_headers, response_iter)
 
-        # do head insert
+        def make_head_insert(rule):
+            return (self.head_insert_view.render_to_string(wbrequest=wbrequest,
+                                                           cdx=cdx,
+                                                           rule=rule))
+         # do head insert
         if self.head_insert_view:
-            head_insert_str = self.head_insert_view.render_to_string(wbrequest = wbrequest, cdx = cdx)
+            head_insert_func = make_head_insert
         else:
-            head_insert_str = None
+            head_insert_func = None
 
-        (status_headers, response_gen) = self.content_rewriter.rewrite_content(urlrewriter, rewritten_headers, stream, head_insert_str)
+        result = self.content_rewriter.rewrite_content(urlrewriter,
+                                                       rewritten_headers,
+                                                       stream,
+                                                       head_insert_func,
+                                                       cdx['urlkey'])
+
+        (status_headers, response_gen) = result
 
         if self.buffer_response:
             if wbrequest.wb_url.mod == 'id_':
diff --git a/pywb/rewrite/rewrite_content.py b/pywb/rewrite/rewrite_content.py
index 80daf7e3..1ba3d321 100644
--- a/pywb/rewrite/rewrite_content.py
+++ b/pywb/rewrite/rewrite_content.py
@@ -11,9 +11,12 @@ from pywb.utils.statusandheaders import StatusAndHeaders
 from pywb.utils.bufferedreaders import DecompressingBufferedReader, ChunkedDataReader
 
 
+#=================================================================
 class RewriteContent:
-    def __init__(self, config=None):
-        self.ruleset = RuleSet(RewriteRules, 'rewrite', config, {})
+    def __init__(self, ds_rules_file=None):
+        self.ruleset = RuleSet(RewriteRules, 'rewrite',
+                               default_rule_config={},
+                               ds_rules_file=ds_rules_file)
 
     def rewrite_headers(self, urlrewriter, status_headers, stream, urlkey=''):
         header_rewriter_class = self.ruleset.get_first_match(urlkey).rewriters['header']
@@ -31,7 +34,7 @@ class RewriteContent:
 
         return (rewritten_headers, stream)
 
-    def rewrite_content(self, urlrewriter, headers, stream, head_insert_str=None, urlkey=''):
+    def rewrite_content(self, urlrewriter, headers, stream, head_insert_func=None, urlkey=''):
 
         # see if we've already rewritten headers
         if isinstance(headers, RewrittenStatusAndHeaders):
@@ -65,7 +68,6 @@ class RewriteContent:
 
         text_type = rewritten_headers.text_type
 
-        #rewriter_class = self.rewriters.get(text_type)
         rule = self.ruleset.get_first_match(urlkey)
 
         try:
@@ -74,10 +76,13 @@ class RewriteContent:
             raise Exception('Unknown Text Type for Rewrite: ' + text_type)
 
         #import sys
-        #sys.stderr.write(str(vars(self.ruleset.get_first_match(urlkey))))
+        #sys.stderr.write(str(vars(rule)))
 
         if text_type == 'html':
-            head_insert_str = rule.create_head_inserts() + head_insert_str
+            head_insert_str = ''
+
+            if head_insert_func:
+                head_insert_str = head_insert_func(rule)
 
             rewriter = rewriter_class(urlrewriter,
                                       outstream=None,
diff --git a/pywb/rewrite/rewrite_live.py b/pywb/rewrite/rewrite_live.py
index 9d752d10..63783234 100644
--- a/pywb/rewrite/rewrite_live.py
+++ b/pywb/rewrite/rewrite_live.py
@@ -7,11 +7,11 @@ import mimetypes
 from pywb.utils.loaders import is_http
 from pywb.utils.timeutils import datetime_to_timestamp
 from pywb.utils.statusandheaders import StatusAndHeaders
+from pywb.utils.canonicalize import canonicalize
 
 from pywb.rewrite.url_rewriter import UrlRewriter
 from pywb.rewrite.rewrite_content import RewriteContent
 
-from pywb.cdx.canonicalize import canonicalize
 
 """
 Fetch a url from live web and apply rewriting rules
@@ -43,7 +43,7 @@ def get_local_file(uri):
     return (status_headers, stream)
 
 #=================================================================
-def get_rewritten(url, urlrewriter, urlkey=None):
+def get_rewritten(url, urlrewriter, urlkey=None, head_insert_func=None):
     if is_http(url):
         (status_headers, stream) = get_status_and_stream(url)
     else:
@@ -53,11 +53,15 @@ def get_rewritten(url, urlrewriter, urlkey=None):
     if not urlkey:
         urlkey = canonicalize(url)
 
-    status_headers, gen = RewriteContent().rewrite_content(urlrewriter,
-                                                           status_headers,
-                                                           stream,
-                                                           head_insert_str='',
-                                                           urlkey=urlkey)
+    rewriter = RewriteContent()
+
+    result = rewriter.rewrite_content(urlrewriter,
+                                      status_headers,
+                                      stream,
+                                      head_insert_func=head_insert_func,
+                                      urlkey=urlkey)
+
+    status_headers, gen = result
 
     buff = ''
     for x in gen:
diff --git a/pywb/rewrite/rewriterules.py b/pywb/rewrite/rewriterules.py
new file mode 100644
index 00000000..e1584162
--- /dev/null
+++ b/pywb/rewrite/rewriterules.py
@@ -0,0 +1,53 @@
+from pywb.utils.dsrules import BaseRule
+
+from regex_rewriters import RegexRewriter, CSSRewriter, XMLRewriter
+from regex_rewriters import JSLinkAndLocationRewriter, JSLinkOnlyRewriter
+from html_rewriter import HTMLRewriter
+from header_rewriter import HeaderRewriter
+
+import itertools
+
+class RewriteRules(BaseRule):
+    def __init__(self, url_prefix, config={}):
+        super(RewriteRules, self).__init__(url_prefix, config)
+
+        self.rewriters = {}
+
+        #self._script_head_inserts = config.get('script_head_inserts', {})
+
+        self.rewriters['header'] = config.get('header_class', HeaderRewriter)
+        self.rewriters['css'] = config.get('css_class', CSSRewriter)
+        self.rewriters['xml'] = config.get('xml_class', XMLRewriter)
+        self.rewriters['html'] = config.get('html_class', HTMLRewriter)
+
+        # Custom handling for js rewriting, often the most complex
+        self.js_rewrite_location = config.get('js_rewrite_location', True)
+        self.js_rewrite_location = bool(self.js_rewrite_location)
+
+        # ability to toggle rewriting
+        if self.js_rewrite_location:
+            js_default_class = JSLinkAndLocationRewriter
+        else:
+            js_default_class = JSLinkOnlyRewriter
+
+        # set js class, using either default or override from config
+        self.rewriters['js'] = config.get('js_class', js_default_class)
+
+        # add any regexs for js rewriter
+        self._add_custom_regexs('js', config)
+
+    def _add_custom_regexs(self, field, config):
+        regexs = config.get(field + '_regexs')
+        if not regexs:
+            return
+
+        rewriter_cls = self.rewriters[field]
+
+        rule_def_tuples = RegexRewriter.parse_rules_from_config(regexs)
+
+        def extend_rewriter_with_regex(urlrewriter):
+            #import sys
+            #sys.stderr.write('\n\nEXTEND: ' + str(rule_def_tuples))
+            return rewriter_cls(urlrewriter, rule_def_tuples)
+
+        self.rewriters[field] = extend_rewriter_with_regex
diff --git a/pywb/rewrite/test/test_rewrite_live.py b/pywb/rewrite/test/test_rewrite_live.py
index f3a7667a..36e74848 100644
--- a/pywb/rewrite/test/test_rewrite_live.py
+++ b/pywb/rewrite/test/test_rewrite_live.py
@@ -8,9 +8,18 @@ from pywb import get_test_dir
 
 urlrewriter = UrlRewriter('20131226101010/http://example.com/some/path/index.html', '/pywb/')
 
+def head_insert_func(rule):
+    if rule.js_rewrite_location == True:
+        return '<script src="/static/default/wombat.js"> </script>'
+    else:
+        return ''
+
 
 def test_local_1():
-    status_headers, buff = get_rewritten(get_test_dir() + 'text_content/sample.html', urlrewriter, 'com,example,test)/')
+    status_headers, buff = get_rewritten(get_test_dir() + 'text_content/sample.html',
+                                         urlrewriter,
+                                         'com,example,test)/',
+                                         head_insert_func)
 
     # wombat insert added
     assert '<head><script src="/static/default/wombat.js"> </script>' in buff
@@ -23,7 +32,10 @@ def test_local_1():
 
 
 def test_local_2_no_js_location_rewrite():
-    status_headers, buff = get_rewritten(get_test_dir() + 'text_content/sample.html', urlrewriter, 'example,example,test)/nolocation_rewrite')
+    status_headers, buff = get_rewritten(get_test_dir() + 'text_content/sample.html',
+                                         urlrewriter,
+                                         'example,example,test)/nolocation_rewrite',
+                                         head_insert_func)
 
     # no wombat insert
     assert '<head><script src="/static/default/wombat.js"> </script>' not in buff
@@ -55,6 +67,6 @@ def test_example_domain_specific_3():
     status_headers, buff = get_rewritten('http://facebook.com/digitalpreservation', urlrewriter)
 
     # comment out bootloader
-    assert '/* Bootloader.configurePage' in buff, buff
+    assert '/* Bootloader.configurePage' in buff
 
 
diff --git a/pywb/static/wb.js b/pywb/static/wb.js
index a7b39370..c4798da8 100644
--- a/pywb/static/wb.js
+++ b/pywb/static/wb.js
@@ -1,18 +1,21 @@
+/*
+Copyright(c) 2013-2014 Ilya Kreymer. Released under the GNU General Public License.
 
+This file is part of pywb.
 
-// Rewritten location and domain obj setup
-window.WB_wombat_location = window.location
+    pywb is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
 
-if (window.top != window) {
-    window.top.WB_wombat_location = window.top.location
-}
-
-if (window.opener) {
-    window.opener.WB_wombat_location = window.opener.location
-}
-
-document.WB_wombat_domain = document.domain
+    pywb is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
 
+    You should have received a copy of the GNU General Public License
+    along with pywb.  If not, see <http://www.gnu.org/licenses/>.
+*/
 
 function initBanner()
 {
diff --git a/pywb/static/wombat.js b/pywb/static/wombat.js
new file mode 100644
index 00000000..d2b7d12c
--- /dev/null
+++ b/pywb/static/wombat.js
@@ -0,0 +1,219 @@
+/*
+Copyright(c) 2013-2014 Ilya Kreymer. Released under the GNU General Public License.
+
+This file is part of pywb.
+
+    pywb is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    pywb is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with pywb.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+//============================================
+// Wombat JS-Rewriting Library
+//============================================
+
+var WB_wombat_replayPrefix;
+var WB_wombat_replayDatePrefix;
+var WB_wombat_captureDatePart;
+var WB_wombat_origHost;
+
+	
+function WB_StripPort(str)
+{
+  var hostWithPort = str.match(/^http:\/\/[\w\d@.-]+:\d+/);
+  if (hostWithPort) {
+     var hostName = hostWithPort[0].substr(0, hostWithPort[0].lastIndexOf(':'));
+     return hostName + str.substr(hostWithPort[0].length);
+  }
+
+  return str;
+}
+
+function WB_IsHostUrl(str)
+{
+  // Good guess that's its a hostname
+  if (str.indexOf("www.") == 0) {
+    return true;
+  }
+  
+  // hostname:port (port required)
+  var matches = str.match(/^[\w-]+(\.[\w-_]+)+(:\d+)(\/|$)/);
+  if (matches && (matches[0].length < 64)) {
+    return true;
+  }
+  
+  // ip:port
+  matches = str.match(/^\d+\.\d+\.\d+\.\d+(:\d+)?(\/|$)/);
+  if (matches && (matches[0].length < 64)) {
+    return true;
+  }
+
+  return false;
+}
+
+function WB_RewriteUrl(url)
+{
+  var httpPrefix = "http://";
+
+  // If not dealing with a string, just return it
+  if (!url || (typeof url) != "string") {
+    return url;
+  }
+  
+  // If starts with prefix, no rewriting needed
+  // Only check replay prefix (no date) as date may be different for each capture
+  if (url.indexOf(WB_wombat_replayPrefix) == 0) {
+    return url;
+  }
+  
+  // If server relative url, add prefix and original host
+  if (url.charAt(0) == "/") {
+    
+    // Already a relative url, don't make any changes!
+    if (url.indexOf(WB_wombat_captureDatePart) >= 0) {
+      return url;
+    }
+    
+    return WB_wombat_replayDatePrefix + WB_wombat_origHost + url;
+  }
+  
+  // If full url starting with http://, add prefix
+  if (url.indexOf(httpPrefix) == 0) {
+    return WB_wombat_replayDatePrefix + url;
+  }
+  
+  // May or may not be a hostname, call function to determine
+  // If it is, add the prefix and make sure port is removed
+  if (WB_IsHostUrl(url)) {
+    return WB_wombat_replayDatePrefix + httpPrefix + url;
+  }
+
+  return url;
+}
+
+function WB_CopyObjectFields(obj)
+{
+  var newObj = {};
+  
+  for (prop in obj) {
+    if ((typeof obj[prop]) != "function") {
+      newObj[prop] = obj[prop];
+    }
+  }
+  
+  return newObj;
+}
+
+function WB_ExtractOrig(href)
+{
+  if (!href) {
+    return "";
+  }
+  href = href.toString();
+  var index = href.indexOf("/http", 1);
+  if (index > 0) {
+    return href.substr(index + 1);
+  } else {
+    return href;
+  }
+}
+  
+function WB_CopyLocationObj(loc)
+{
+  var newLoc = WB_CopyObjectFields(loc);
+  
+  newLoc._origLoc = loc;
+  newLoc._origHref = loc.href;
+  
+  // Rewrite replace and assign functions
+  newLoc.replace = function(url) { this._origLoc.replace(WB_RewriteUrl(url)); }
+  newLoc.assign = function(url) { this._origLoc.assign(WB_RewriteUrl(url)); }
+  newLoc.reload = loc.reload;
+  newLoc.href = WB_ExtractOrig(newLoc._origHref);
+  newLoc.toString = function() { return this.href; }
+  
+  return newLoc;
+}
+
+function WB_wombat_updateLoc(reqHref, origHref, location)
+{
+  if (reqHref && (WB_ExtractOrig(origHref) != WB_ExtractOrig(reqHref))) {      
+    var finalHref = WB_RewriteUrl(reqHref);
+    
+    location.href = finalHref;
+  }  
+}
+
+function WB_wombat_checkLocationChange(wbLoc, isTop)
+{
+  var locType = (typeof wbLoc);
+  
+  var location = (isTop ? window.top.location : window.location);
+	
+  // String has been assigned to location, so assign it
+  if (locType == "string") {
+    WB_wombat_updateLoc(wbLoc, location.href, location)
+    
+  } else if (locType == "object") {
+    WB_wombat_updateLoc(wbLoc.href, wbLoc._origHref, location);
+  }
+}
+
+var wombat_updating = false;
+
+function WB_wombat_checkLocations()
+{
+  if (wombat_updating) {
+    return false;
+  }
+  
+  wombat_updating = true;
+  
+  WB_wombat_checkLocationChange(window.WB_wombat_location, false);
+  
+  if (window.self.location != window.top.location) {
+    WB_wombat_checkLocationChange(window.top.WB_wombat_location, true);
+  }
+  
+  wombat_updating = false;
+}
+
+function WB_wombat_Init(replayPrefix, captureDate, origHost)
+{
+  WB_wombat_replayPrefix = replayPrefix;
+  WB_wombat_replayDatePrefix = replayPrefix + captureDate + "/";
+  WB_wombat_captureDatePart = "/" + captureDate + "/";
+  
+  WB_wombat_origHost = "http://" + origHost;
+
+  window.WB_wombat_location = WB_CopyLocationObj(window.self.location);
+
+
+  if (window.self.location != window.top.location) {
+    window.top.WB_wombat_location = WB_CopyLocationObj(window.top.location);
+  }
+
+  if (window.opener) {
+    window.opener.WB_wombat_location = (window.opener ? WB_CopyLocationObj(window.opener.location) : null);
+  }
+
+
+  document.WB_wombat_domain = origHost;
+
+}
+
+// Check quickly after page load
+setTimeout(WB_wombat_checkLocations, 100);
+
+
+// Check periodically every few seconds
+setInterval(WB_wombat_checkLocations, 500);
diff --git a/pywb/ui/head_insert.html b/pywb/ui/head_insert.html
index b30cd015..aa910442 100644
--- a/pywb/ui/head_insert.html
+++ b/pywb/ui/head_insert.html
@@ -1,7 +1,14 @@
 <!-- WB Insert -->
+{% if rule.js_rewrite_location %}
+<script src='{{ wbrequest.host_prefix }}/static/default/wombat.js'> </script>
 <script>
-wbinfo = {}
-wbinfo.capture_str = "{{ cdx['timestamp'] | format_ts }}";
+  WB_wombat_Init("{{wbrequest.wb_prefix}}", "{{cdx['timestamp']}}", "{{cdx['original'] | host}}");
+</script>
+{% endif %}
+
+<script>
+  wbinfo = {}
+  wbinfo.capture_str = "{{ cdx['timestamp'] | format_ts }}";
 </script>
 <script src='{{ wbrequest.host_prefix }}/static/default/wb.js'> </script>
 <link rel='stylesheet' href='{{ wbrequest.host_prefix }}/static/default/wb.css'/>
diff --git a/pywb/cdx/canonicalize.py b/pywb/utils/canonicalize.py
similarity index 95%
rename from pywb/cdx/canonicalize.py
rename to pywb/utils/canonicalize.py
index e2f818b9..bd21e4ca 100644
--- a/pywb/cdx/canonicalize.py
+++ b/pywb/utils/canonicalize.py
@@ -3,8 +3,6 @@
 
 import surt
 import urlparse
-from cdxobject import CDXException
-
 
 #=================================================================
 class UrlCanonicalizer(object):
@@ -15,6 +13,12 @@ class UrlCanonicalizer(object):
         return canonicalize(url, self.surt_ordered)
 
 
+#=================================================================
+class UrlCanonicalizeException(Exception):
+    def status(self):
+        return '400 Bad Request'
+
+
 #=================================================================
 def canonicalize(url, surt_ordered=True):
     """
@@ -31,7 +35,7 @@ def canonicalize(url, surt_ordered=True):
     try:
         key = surt.surt(url)
     except Exception as e:
-        raise CDXException('Invalid Url: ' + url)
+        raise UrlCanonicalizeException('Invalid Url: ' + url)
 
     # if not surt, unsurt the surt to get canonicalized non-surt url
     if not surt_ordered:
diff --git a/pywb/utils/dsrules.py b/pywb/utils/dsrules.py
new file mode 100644
index 00000000..2e6f9626
--- /dev/null
+++ b/pywb/utils/dsrules.py
@@ -0,0 +1,98 @@
+import yaml
+import pkgutil
+
+#=================================================================
+
+DEFAULT_RULES_FILE = 'rules.yaml'
+DEFAULT_RULES_PKG = 'pywb'
+
+
+#=================================================================
+class RuleSet(object):
+    DEFAULT_KEY = ''
+
+    def __init__(self, rule_cls, fieldname, **kwargs):
+        """
+        A domain specific rules block, inited via config map.
+        If config map not specified, it is loaded from default location.
+
+        The rules are represented as a map by domain.
+        Each rules configuration will load is own field type
+        from the list and given a specified rule_cls.
+        """
+
+        self.rules = []
+
+        ds_rules_file = kwargs.get('ds_rules_file')
+        default_rule_config = kwargs.get('default_rule_config')
+
+        config = self.load_default_rules(ds_rules_file)
+
+        rulesmap = config.get('rules') if config else None
+
+        # if default_rule_config provided, always init a default ruleset
+        if not rulesmap and default_rule_config is not None:
+            self.rules = [rule_cls(self.DEFAULT_KEY, default_rule_config)]
+            return
+
+        def_key_found = False
+
+        # iterate over master rules file
+        for value in rulesmap:
+            url_prefix = value.get('url_prefix')
+            rules_def = value.get(fieldname)
+            if not rules_def:
+                continue
+
+            if url_prefix == self.DEFAULT_KEY:
+                def_key_found = True
+
+            self.rules.append(rule_cls(url_prefix, rules_def))
+
+        # if default_rule_config provided, always init a default ruleset
+        if not def_key_found and default_rule_config is not None:
+            self.rules.append(rule_cls(self.DEFAULT_KEY, default_rule_config))
+
+    @staticmethod
+    def load_default_rules(filename=None, pkg=None):
+        config = None
+
+        if not filename:
+            filename = DEFAULT_RULES_FILE
+
+        if not pkg:
+            pkg = DEFAULT_RULES_PKG
+
+        if filename:
+            yaml_str = pkgutil.get_data(pkg, filename)
+            config = yaml.load(yaml_str)
+
+        return config
+
+    def iter_matching(self, urlkey):
+        """
+        Iterate over all matching rules for given urlkey
+        """
+        for rule in self.rules:
+            if rule.applies(urlkey):
+                yield rule
+
+    def get_first_match(self, urlkey):
+        for rule in self.rules:
+            if rule.applies(urlkey):
+                return rule
+
+
+#=================================================================
+class BaseRule(object):
+    """
+    Base rule class -- subclassed to handle specific
+    rules for given url_prefix key
+    """
+    def __init__(self, url_prefix, rules):
+        self.url_prefix = url_prefix
+        if not isinstance(self.url_prefix, list):
+            self.url_prefix = [self.url_prefix]
+
+    def applies(self, urlkey):
+        return any(urlkey.startswith(x) for x in self.url_prefix)
diff --git a/pywb/wbapp.py b/pywb/wbapp.py
index 0befa172..ac51ba9d 100644
--- a/pywb/wbapp.py
+++ b/pywb/wbapp.py
@@ -2,6 +2,7 @@ from wbexceptions import WbException, NotFoundException, InternalRedirect
 from wbrequestresponse import WbResponse, StatusAndHeaders
 
 from pywb.cdx.cdxserver import CDXException
+from pywb.utils.canonicalize import UrlCanonicalizeException
 from pywb.warc.recordloader import ArchiveLoadFailed
 
 import os
@@ -55,7 +56,8 @@ def create_wb_app(wb_router):
         except InternalRedirect as ir:
             response = WbResponse(StatusAndHeaders(ir.status, ir.httpHeaders))
 
-        except (WbException, CDXException, ArchiveLoadFailed) as e:
+        except (WbException, CDXException,
+                UrlCanonicalizeException, ArchiveLoadFailed) as e:
             response = handle_exception(env, wb_router.error_view, e, False)
 
         except Exception as e:
diff --git a/setup.py b/setup.py
index dac8a907..0750fe55 100755
--- a/setup.py
+++ b/setup.py
@@ -13,7 +13,7 @@ setuptools.setup(name='pywb',
         license='GPL',
         packages=['pywb','pywb.utils','pywb.cdx','pywb.warc','pywb.rewrite'],
         provides=['pywb','pywb.utils','pywb.cdx','pywb.warc','pywb.rewrite'],
-        package_data={'pywb': ['ui/*', 'static/*'], 'pywb.cdx': ['*.yaml']},
+        package_data={'pywb': ['ui/*', 'static/*'], 'pywb': ['*.yaml']},
         data_files = [('sample_archive/cdx/', glob.glob('sample_archive/cdx/*')),
                       ('sample_archive/warcs/', glob.glob('sample_archive/warcs/*')),
                       ('sample_archive/text_content/', glob.glob('sample_archive/text_content/*'))],