I am trying to return a ZipInputStream containing two different output streams, like a javax.ws.rs.core.Response stream. When I make a web service call to retrieve a stream, I notice that I am getting an empty stream back. I tried to return a GZipInputStream before, and I got the expected stream on the client side. Could there be a problem with ZipInputStream that prevents it from returning correctly? I am using javax 2.4 (servlet-api) Here is what my jax-rs service looks like (I simplified it a bit):
@GET
@Produces({"application/zip", MediaType.APPLICATION_XML})
public Response getZipFiles(@PathParam("id") final Integer id){
ByteArrayOutputStream bundledStream = new ByteArrayOutputStream();
ZipOutputStream out = new ZipOutputStream(bundledStream);
out.putNextEntry(new ZipEntry("Item A"));
out.write(outputStream.toByteArray());
out.closeEntry();
out.putNextEntry(new ZipEntry("Item B"));
out.write(defectiveBillOutputStream.toByteArray());
out.closeEntry();
out.close();
bundledStream.close();
ZipInputStream zis = new ZipInputStream(new ByteArrayInputStream(bundledStream.toByteArray()));
return Response.ok(zis).build();
}
And this is the code that calls the service. I am using axis 1.4:
HttpMethodBase getBillGroup = null;
String id = "1234";
String absoluteUrl = baseURL + BASE_SERVICE_PATH.replace("@id@",id) ;
getZip = new GetMethod(absoluteUrl);
HttpClient httpClient = new HttpClient();
try {
httpClient.executeMethod(getZip);
}
catch (Exception e) {
LOGGER.error("Error during retrieval " + e.getMessage());
}
InputStream dataToConvert = getZip.getResponseBodyAsStream();
ZipInputStream in = new ZipInputStream(dataToConvert);
ZipEntry itemA = in.getNextEntry();
On the last line, itemA should have been the first record added to the stream in the Jax-RS service, but I am returning zero. Any idea what could be causing this?