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https://issues.apache.org/jira/browse/TIKA-539?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12925288#action_12925288
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Reinhard Schwab commented on TIKA-539:
--------------------------------------
hi ken,
in other words:
it trusts the server iff(if and only if) the data provided by the server is not
contradictional.
if metadata and meta tags are not contradictional.
the rule logic is:
no encoding in metadata && encoding in meta tags --> return encoding in meta
tags
no encoding in meta tags && encoding in metadata --> return encoding in metadata
encoding in meta tags && encoding in metadata && encodings are equal --> return
this encoding
return encoding from charset detection
the rule logic now is:
encoding in meta tags --> return this encoding
encoding in metadata --> guide charset detector
return encoding from charset detection
there is no comparison/no matchmaking of meta tags and metadata.
> Encoding detection is too biased by encoding in meta tag
> --------------------------------------------------------
>
> Key: TIKA-539
> URL: https://issues.apache.org/jira/browse/TIKA-539
> Project: Tika
> Issue Type: Bug
> Affects Versions: 0.8
> Reporter: Reinhard Schwab
> Assignee: Ken Krugler
> Fix For: 0.8
>
> Attachments: TIKA-539.patch, TIKA-539_2.patch
>
>
> if the encoding in the meta tag is wrong, this encoding is detected,
> even if there is the right encoding set in metadata before(which can be from
> http response header).
> test code to reproduce:
> static String content = "<html><head>\n"
> + "<meta http-equiv=\"content-type\"
> content=\"application/xhtml+xml; charset=iso-8859-1\" />"
> + "</head><body>Über den Wolken\n</body></html>";
> /**
> * @param args
> * @throws IOException
> * @throws TikaException
> * @throws SAXException
> */
> public static void main(String[] args) throws IOException, SAXException,
> TikaException {
> Metadata metadata = new Metadata();
> metadata.set(Metadata.CONTENT_TYPE, "text/html");
> metadata.set(Metadata.CONTENT_ENCODING, "UTF-8");
> System.out.println(metadata.get(Metadata.CONTENT_ENCODING));
> InputStream in = new
> ByteArrayInputStream(content.getBytes("UTF-8"));
> AutoDetectParser parser = new AutoDetectParser();
> BodyContentHandler h = new BodyContentHandler(10000);
> parser.parse(in, h, metadata, new ParseContext());
> System.out.print(h.toString());
> System.out.println(metadata.get(Metadata.CONTENT_ENCODING));
> }
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