deferred_style: encode data in bz2, zlib can overflow

bt5/erp5_deferred_style/SkinTemplateItem/portal_skins/erp5_deferred_style_core/Base_renderReportSection.xml

@@ -77,7 +77,7 @@ with portal.Localizer.translationContext(localizer_language):\n
 \n
   report_section.popReport(portal, render_prefix=render_prefix)\n
 \n
-return report_section_idx, data.encode(\'utf8\').encode(\'zlib\')\n
+return report_section_idx, data.encode(\'utf8\').encode(\'bz2\')\n
 </string> </value>
         </item>
         <item>

bt5/erp5_deferred_style/SkinTemplateItem/portal_skins/erp5_deferred_style_core/Base_report.xml

@@ -68,10 +68,17 @@ with portal.Localizer.translationContext(localizer_language):\n
   \n
   def dummyReportMethod():\n
     return report_section_list\n
+\n
+  def decodeReportSection(data):\n
+    # BBB We use to encode in zlib\n
+    try:\n
+      return data.decode(\'bz2\')\n
+    except IOError:\n
+      return data.decode(\'zlib\')\n
 \n
   report_data = context.restrictedTraverse(form_path).report_view.pt_render(\n
       extra_context=dict(options={\'format\': format},\n
-                         rendered_report_item_list=(r[1].decode(\'zlib\') for r in report_section_list),\n
+                         rendered_report_item_list=(decodeReportSection(r[1]) for r in report_section_list),\n
                          report_method=dummyReportMethod,\n
                          form=portal.restrictedTraverse(form_path)))\n
 \n

[Jérome Perrin]

I'm don't remember we investigated this error, it might be a bug in python ( https://bugs.python.org/issue10276 maybe ? ). Switching to bzip2 solved the problem.