Testing upload of zip files in java throws EOFException

Question

I made controller for uploading zip files, and when I tested it through Postman, everything worked as intended.

Now I'm trying to create test for this controller, using custom test framework.

Part of my controller method for extracting zip:

 try (final ZipInputStream zis = new ZipInputStream(file.getInputStream())) {
            byte[] buffer = new byte[1024];
            ZipEntry entry;
// until here everything works, next line throws EOFException
            while ((entry = zis.getNextEntry()) != null) {
                String entryName = entry.getName();
                StringBuilder stringBuilder = new StringBuilder();

                int read;

                while ((read = zis.read(buffer, 0, buffer.length)) != -1) {
                    stringBuilder.append(new String(buffer,0, read ));
                }

            }
        } catch (IOException e) {
            throw new GeneralServerException(e);
        }

Everything works fine up to line: ((entry = zis.getNextEntry()) != null):

Caused by: java.io.EOFException
    at java.util.zip.ZipInputStream.readFully(ZipInputStream.java:405) ~[?:1.8.0_181]
    at java.util.zip.ZipInputStream.readLOC(ZipInputStream.java:321) ~[?:1.8.0_181]
    at java.util.zip.ZipInputStream.getNextEntry(ZipInputStream.java:122) ~[?:1.8.0_181]
    ... 81 more

And this is part of my class for creating multipart request:

    private static final String FILE_PART_PATTERN = "\r\nContent-Disposition: form-data; name=\"file\"; filename=\"%s\";\r\nContent-Type: application/zip\r\n\r\n%s\r\n--";


        @Override
        public String getValue() {
            try {
                String fileContent = IOUtils.toString(getInputStream());
                String rawPart = String.format(FILE_PART_PATTERN, getName(), fileContent);
                return rawPart;
            } catch (IOException e) {
                throw new RuntimeException(e);
            }
        }

And this is how I create file part of multipart request in test:

FilePart file = new FilePart("file", getClass().getResourceAsStream("/user_agreements.zip"));

I don't understand where the problem is and why this doesn't work. Method for extracting zips works fine when tested via Postman.

score 0 · Answer 1 · answered Oct 15 '18 at 16:36

0

I can only recommend checking a couple of things that were common traps I ran into when working with filessystems, as I see no explicit fault in your implementation right now:

Check if no file deletion occurred, especially between getting the stream and getNextEntry.
Check if you have the according access/permissions.
Check if the file is in use by something else, e.g. open somewhere or accessed otherwise (!)
Get the zip itself and see if it opens properly, maybe it was corrupted during data transfer

These are issues I have personally encountered at some point or another.

answered Oct 15 '18 at 16:36

Koenigsberg

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Thank you for your answer. I tried all of that, but it still doesn't work. While debugging, it doesn't recognize any ZipEntry, like there are no any, but end of file is set to false. I guess that may be the reason why exception is thrown. I still don't know how to solve this. – Oct 16 '18 at 07:36
When I add to IOUtils.toString a charset cp437 then it recognize entries, but when it tries to read first entry, another exception is thrown: ZipException: invalid block type. – Oct 16 '18 at 08:19
See if response #2 helps: https://stackoverflow.com/questions/7561031/zipinputstream-getnextentry-is-null-when-extracting-zip-files – Koenigsberg Oct 16 '18 at 08:33

Testing upload of zip files in java throws EOFException

1 Answers1