Fix for https://github.com/mgedmin/zodbbrowser/issues/12 and another issue I haven't filed yet

gistfile1.diff

--- /srv/zopes/akl-2.13/eggs/zodbbrowser-0.12.0-py2.6.egg/zodbbrowser/browser.py.orig	2015-02-27 16:40:42.000000000 +0200
+++ /srv/zopes/akl-2.13/eggs/zodbbrowser-0.12.0-py2.6.egg/zodbbrowser/browser.py	2015-02-27 17:08:21.000000000 +0200
@@ -92,6 +92,9 @@
     def __call__(self):
         try:
             return self.render()
+        except:
+            import traceback; traceback.print_exc()
+            import pdb; pdb.post_mortem()
         finally:
             if self.readonly or not self.made_changes:
                 resources = transaction.get()._resources
@@ -399,12 +402,17 @@
             diff = compareDictsHTML(curState, oldState, d['tid'])
 
             results.append(dict(utid=u64(d['tid']),
+                                xtid='0x%x' % u64(d['tid']),
                                 href=url, current=current,
                                 error=state[n]['error'],
-                                diff=diff, user_id=user_id,
-                                user_location=user_location,
+                                diff=diff, user_id=unicodify(user_id),
+                                user_location=unicodify(user_location),
                                 utc_timestamp=utc_timestamp,
-                                local_timestamp=local_timestamp, **d))
+                                local_timestamp=local_timestamp,
+                                size=d['size'],
+                                location=unicodify(d.get('location')),
+                                request_type=unicodify(d.get('request_type')),
+                                description=unicodify(d['description'])))
 
         # number in reverse order
         for i in range(len(results)):
@@ -514,9 +522,9 @@
                 index=(self.first_idx + n + 1),
                 utc_timestamp=utc_timestamp,
                 local_timestamp=local_timestamp,
-                user_id=user_id,
-                user_location=user_location,
-                description=d.description,
+                user_id=unicodify(user_id),
+                user_location=unicodify(user_location),
+                description=unicodify(d.description),
                 utid=utid,
                 current=(d.tid == requested_tid),
                 href=self.getUrl(tid=utid),
@@ -573,3 +581,28 @@
             break
     return ''.join(path[::-1])
 
+
+def unicodify(s):
+    r"""Make sure the value is unicode.
+    
+    The data comes from the database and may be unicode or it may be a
+    string in some unknown encoding, or it may be None.
+
+        >>> unicodify(u'\u263B')
+        u'\u263b'
+
+        >>> unicodify('\xe2\x98\xbb')
+        u'\u263b'
+
+        >>> unicodify('\xff')
+        "'\xff'"
+
+        >>> unicodify(None)
+
+    """
+    if isinstance(s, str):
+        try:
+            return unicode(s, 'utf-8')
+        except UnicodeDecodeError:
+            return repr(s)
+    return s

--- eggs/zodbbrowser-0.12.0-py2.6.egg/zodbbrowser/templates/zodbinfo.pt.orig	2015-02-27 17:05:28.000000000 +0200
+++ eggs/zodbbrowser-0.12.0-py2.6.egg/zodbbrowser/templates/zodbinfo.pt	2015-02-27 17:05:22.000000000 +0200
@@ -103,7 +103,7 @@
                                           and 'transaction current' or 'transaction'">
         <h4 class="transaction" tal:attributes="id string:tid${history/utid}">
           <a class="subtitle"
-             tal:attributes="href string:@@zodbbrowser_history?tid=${history/utid}">view transaction record</a>
+             tal:attributes="href string:@@zodbbrowser_history?tid=${history/xtid}">view transaction record</a>
           <a class="title" tal:attributes="href history/href">
             #<span tal:replace="history/index" />:
             <span class="timestamp" tal:content="string:${history/utc_timestamp}" title="UTC" />