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Nick Burch commented on TIKA-721: --------------------------------- I'd suggest we check for invalid UTF-16 sequences (see http://unicode.org/faq/utf_bom.html#utf16-7 for which ranges aren't allowed). If we don't find any invalid ones, then we'll still need to do some detection. Looking for 0-255+0,0-255+0 or 0+0-255,0+0-255 will work well for western european stuff, but others will probably need fancy munging of existing ngrams.... > UTF16-LE not detected > --------------------- > > Key: TIKA-721 > URL: https://issues.apache.org/jira/browse/TIKA-721 > Project: Tika > Issue Type: Bug > Components: parser > Reporter: Michael McCandless > Assignee: Michael McCandless > Priority: Minor > Attachments: Chinese_Simplified_utf16.txt > > > I have a test file encoded in UTF16-LE, but Tika fails to detect it. > Note that it is missing the BOM, which is not allowed (for UTF16-BE > the BOM is optional). > Not sure we can realistically fix this; I have no idea how... > Here's what Tika detects: > {noformat} > windows-1250: confidence=9 > windows-1250: confidence=7 > windows-1252: confidence=7 > windows-1252: confidence=6 > windows-1252: confidence=5 > IBM420_ltr: confidence=4 > windows-1252: confidence=3 > windows-1254: confidence=2 > windows-1250: confidence=2 > windows-1252: confidence=2 > IBM420_rtl: confidence=1 > windows-1253: confidence=1 > windows-1250: confidence=1 > windows-1252: confidence=1 > windows-1252: confidence=1 > windows-1252: confidence=1 > windows-1252: confidence=1 > windows-1252: confidence=1 > {noformat} > The test file decodes fine as UTF16-LE; eg in Python just run this: > {noformat} > import codecs > codecs.getdecoder('utf_16_le')(open('Chinese_Simplified_utf16.txt').read()) > {noformat} -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira