Closing Streams passed to MultipartFormDataOutput

Question

Resteasy docs does not explain who is responsible for closing streams passed to MultipartFormDataOutput. Let's consider the following example:

WebTarget target = ClientBuilder.newClient().target("url");
MultipartFormDataOutput formData = new MultipartFormDataOutput();
FileInputStream fis1 = new FileInputStream(new File("/path/to/image1"));
FileInputStream fis2 = new FileInputStream(new File("/path/to/image2"));
formData.addFormData("image", fis1, MediaType.APPLICATION_OCTET_STREAM_TYPE);
formData.addFormData("image", fis2, MediaType.APPLICATION_OCTET_STREAM_TYPE);
Entity<MultipartFormDataOutput> entity = Entity.entity(formData, MediaType.MULTIPART_FORM_DATA);
Response response = target.request().post(entity);

Will the fis1 and fis2 be closed by the resteasy or the user should take care of closing these streams?

Answer 1

So I can answer my question myself, hope someone will benefit from this.

Resteasy will close the passed stream. In my case, the InputStreamProvider will take care of closing the FileInputStream.

     public void writeTo(InputStream inputStream, Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType, MultivaluedMap<String, Object> httpHeaders, OutputStream entityStream) throws IOException
   {
           LogMessages.LOGGER.debugf("Provider : %s,  Method : writeTo", getClass().getName());
       try
       {
           int c = inputStream.read();
           if (c == -1)
           {
               httpHeaders.putSingle(HttpHeaderNames.CONTENT_LENGTH, Integer.toString(0));
               entityStream.write(new byte[0]); // fix RESTEASY-204
               return;
           }
           else
               entityStream.write(c);
         ProviderHelper.writeTo(inputStream, entityStream);
       }
       finally
       {
         inputStream.close();
       }
   }