Jersey client to download and save file

java, jax-rs, jersey-2.0, rest

Solution

I don't know if Jersey let's you simply respond with a file like you have here:

File download = new File("C://Data/Test/downloaded/empty.pdf");
ResponseBuilder response = Response.ok((Object)download);

You can certainly use a StreamingOutput response to send the file from the server, like this:

StreamingOutput stream = new StreamingOutput() {
    @Override
    public void write(OutputStream os) throws IOException,
    WebApplicationException {
        Writer writer = new BufferedWriter(new OutputStreamWriter(os));

        //@TODO read the file here and write to the writer

        writer.flush();
    }
};

return Response.ok(stream).build();

and your client would expect to read a stream and put it in a file:

InputStream in = response.getEntityInputStream();
if (in != null) {
    File f = new File("C://Data/test/downloaded/testnew.pdf");

    //@TODO copy the in stream to the file f

    System.out.println("Result size:" + f.length() + " written to " + f.getPath());
}

Problem

I Am new to jersey/JAX-RS implementation. Please find below my jersey client code to download file: ``` Client client = Client.create(); WebResource wr = client.resource("http://localhost:7070/upload-0.0.1-SNAPSHOT/rest/files/download"); Builder wb=wr.accept("application/json,application/pdf,text/plain,image/jpeg,application/xml,application/vnd.ms-excel"); ClientResponse clientResponse= wr.get(ClientResponse.class); System.out.println(clientResponse.getStatus()); File res= clientResponse.getEntity(File.class); File downloadfile = new File("C://Data/test/downloaded/testnew.pdf"); res.renameTo(downloadfile); FileWriter fr = new FileWriter(res); fr.flush(); ``` My Server side code is : ``` @Path("/download") @GET @Produces({"application/pdf","text/plain","image/jpeg","application/xml","application/vnd.ms-excel"}) public Response getFile() { File download = new File("C://Data/Test/downloaded/empty.pdf"); ResponseBuilder response = Response.ok((Object)download); response.header("Content-Disposition", "attachment; filename=empty.pdf"); return response.build(); } ``` In my client code i am getting response as 200 OK,but i am unable to save my file on hard disk In the below line i am mentioning the path and location where the files need to be saved. Not sure whats going wrong here,any help would be appreciated.Thanks in advance!! ``` File downloadfile = new File("C://Data/test/downloaded/testnew.pdf"); ```

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