File tranfer or file upload using dropwizard framework

[leslie Lau]

Hi all,

Are there any examples of how to implement file transfer?  I would like to upload an image from client and save it on server.  I did find an example using jersey-multipart but was wondering whether their are othey ways.

Thanx in advance,

Leslie

[leslie Lau]

I tried using jersey-multipart with DW 0.6.0 and got this error when DW starts up:

ERROR [2013-02-14 01:07:45,061] com.sun.jersey.spi.inject.Errors: The following

errors and warnings have been detected with resource and/or provider classes:

  SEVERE: Missing dependency for method public java.lang.String com.vip.web.resources.PrintConditionResource.uploadFile(java.io.InputStream) at parameter at index 0

WARN  [2013-02-14 01:07:45,070] /: unavailable

! com.sun.jersey.spi.inject.Errors$ErrorMessagesException: null

! at com.sun.jersey.spi.inject.Errors.processErrorMessages(Errors.java:170)

! at com.sun.jersey.spi.inject.Errors.postProcess(Errors.java:136)

! at com.sun.jersey.spi.inject.Errors.processWithErrors(Errors.java:199)

! at com.sun.jersey.server.impl.application.WebApplicationImpl.initiate(WebAppli

cationImpl.java:765)

! at com.sun.jersey.server.impl.application.WebApplicationImpl.initiate(WebAppli

cationImpl.java:760)

I added a provider to DW using this line:

environment.addProvider(com.sun.jersey.multipart.impl.MultiPartReaderServerSide.class);

And my Resource.java looks like this:

    @POST

    @Path("/logo")

    @Produces(TEXT_PLAIN)

    @Consumes(MULTIPART_FORM_DATA)

    public String uploadFile(@FormDataParam("file") final InputStream stream) {

LOG.info("Enter uploadFile");

        String tempname = UUID.randomUUID().toString();

        final String outputPath = "/tmp" + File.separator + tempname;

        try {

Files.copy(new InputSupplier<InputStream>() {

   @Override

   public InputStream getInput() throws IOException {

       return stream;                

   }

}, new File(outputPath));

LOG.info("Logo saved to: " + outputPath);

return tempname;

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

        

        return "";

    }

Anyone knows what that error means?

[leslie Lau]

Now, I've got a different error......

127.0.0.1 - - [14/Feb/2013:18:19:19 +0000] "POST /uploadattachment HTTP/1.1" 415 1393 -1360796149836 -1360796149836

ERROR [2013-02-14 18:19:23,907] com.sun.jersey.spi.container.ContainerRequest: A

 message body reader for Java class com.sun.jersey.multipart.FormDataMultiPart,

and Java type class com.sun.jersey.multipart.FormDataMultiPart, and MIME media t

ype multipart/form-data; boundary=----------------------------b756c98ff995 was n

ot found.

The registered message body readers compatible with the MIME media type are:

*/* ->

  com.sun.jersey.core.impl.provider.entity.FormProvider

  com.sun.jersey.core.impl.provider.entity.StringProvider

  com.sun.jersey.core.impl.provider.entity.ByteArrayProvider

  com.sun.jersey.core.impl.provider.entity.FileProvider

  com.sun.jersey.core.impl.provider.entity.InputStreamProvider

  com.sun.jersey.core.impl.provider.entity.DataSourceProvider

  com.sun.jersey.core.impl.provider.entity.XMLJAXBElementProvider$General

  com.sun.jersey.core.impl.provider.entity.ReaderProvider

  com.sun.jersey.core.impl.provider.entity.DocumentProvider

  com.sun.jersey.core.impl.provider.entity.SourceProvider$StreamSourceReader

  com.sun.jersey.core.impl.provider.entity.SourceProvider$SAXSourceReader

  com.sun.jersey.core.impl.provider.entity.SourceProvider$DOMSourceReader

  com.sun.jersey.core.impl.provider.entity.XMLRootElementProvider$General

  com.sun.jersey.core.impl.provider.entity.XMLListElementProvider$General

  com.sun.jersey.core.impl.provider.entity.XMLRootObjectProvider$General

  com.sun.jersey.core.impl.provider.entity.EntityHolderReader

  com.fasterxml.jackson.jaxrs.json.JacksonJsonProvider

To test my uploadFile API, I use curl to simulate a POST:

curl -F file=@"C:\\my.png" http://localhost:8080/uploadattachment

Anyone knows what that error registered message body reader is all about?

[leslie Lau]

Whew....all working now....

For those who would like to know, I needed to include this jar:

mimepull-1.6.jar

I'm now able to upload file to my dropwizard service.

Leslie