[JIRA] Created: (LBCORE-208) No <meta http-equiv> header for log file is written by HTMLLayoutBase

8 May 2011

      No <meta http-equiv> header for log file is written by HTMLLayoutBase
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                 Key: LBCORE-208
                 URL: http://jira.qos.ch/browse/LBCORE-208
             Project: logback-core
          Issue Type: Improvement
          Components: Layout
    Affects Versions: 0.9.9
         Environment: Java
            Reporter: Vladislav Rastrusny
            Assignee: Logback dev list
            Priority: Minor

When you use HTMLLayout for log files, logback only sets this HTML header:

{code}<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html>
  <head>
    <title>Logback Log Messages</title>
<style  type="text/css">

</style>
</head>{code}

But if the log file contains symbols beyond ASCII range, some browsers can incorrectly set encoding displaying the file. My FireFox assumed my log file is in ISO-8859-5 when displaying it to me.

Since Java strings are UTF-16 and log is composed of strings, it seems desired to have something like

{code}<meta http-equiv="Content-Type" content="text/html; charset=utf-16">{code}

in the HTML header. To add this functionality you only need to patch  logback-core-0.9.28-sources.jar\ch\qos\logback\core\html\HTMLLayoutBase.getFileHeader() method adding this string to the list.

But it would also be desired to have file header customizable from config file.

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Vladislav Rastrusny (JIRA)

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