URI Decoding doesn't work in MultipartConfig files

Question

I have used this code to decode a URI string: java.net.URLDecoder.decode(request.getParameter("comment"), "UTF-8"). and it works. e.g.

Input: cl%C4%81mor

Output: clāmor

But when I use @MultipartConfig in my java servlet file, this happens:

Input: cl%C4%81mor

Output: cl%C4%81mor

I am not sure why this didn't work. Can you tell me why this happened and/or how to fix it? Thanks in advance.

What ,makes you think that the input is `cl%C4%81mor` in the second case? — Maurice Perry, Mar 01 '18 at 10:35
@MauricePerry it is just an example of the input and output of code, they are two separate things, not linked together — MBJH, Mar 01 '18 at 10:36
The `URLDecoder` is used to decode URL parts. In the case of a multipart data, the parameters are sent with a POST, and are not part of the URL. — Maurice Perry, Mar 01 '18 at 10:39
And even with a GET, request.getParameter should return the decoded parameter. — Maurice Perry, Mar 01 '18 at 10:40

score 0 · Answer 1 · answered Mar 01 '18 at 13:46

Could it be that @MultipartConfig changes the default request encoding in your setup? Can you check what request.getCharacterEncoding() returns UTF-8? Is the value returned from request.getParameter("comment") different after you add @MultipartConfig.

It would be easier to answer if you would provide more information about your setup. If you are using Spring with JEE annotations maybe you want to look at this answer.

URI Decoding doesn't work in MultipartConfig files

1 Answers1