Get filename from Content-Disposition

java http jsp content-disposition
h2c picture h2c · Dec 1, 2014 · Viewed 21.1k times · Source

I'm uploading a blob file from an HTML form to a database using JSP. I need to insert the filename into DB. I know that the filename is stored in the Content-Disposition header, how could I get that?

Answer

Joop Eggen picture Joop Eggen · Dec 1, 2014

If you uploaded the file using JavaEE 6 with HttpServletRequest.getPart:

Part part = request.getPart("xxx"); // input type=file name=xxx
String disposition = part.getHeader("Content-Disposition");
String fileName = disposition.replaceFirst("(?i)^.*filename=\"?([^\"]+)\"?.*$", "$1");

See Part.

As @Marc mentioned I did not treat URL encoding. (He also made the quotes around the filename optional.)

fileName = URLDecoder.decode(fileName, StandardCharsets.ISO_8859_1);

Not checked, but HTTP encoding for headers should be the default ISO-8859-1.

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