REST webservice get image? Path invalid?

Question

I have REST Webservice which give me the file from the system:

@Stateless
@Path("/print")
public class PictureWebservice {

    @GET
    @Path("/startPrint")
    @Produces(MediaType.APPLICATION_OCTET_STREAM)
    public Response getFile() {

        String path = "/mypath.JPG";
      File file = new File(path);
      return Response.ok(file, MediaType.APPLICATION_OCTET_STREAM)
          .header("Content-Disposition", "attachment; filename=\"" + file.getName() + "\"" ) //optional
          .build();
    }
}

If I open my browser and type in: http://192.168.2.11:8080/rest/print/startPrint

=> Everything works fine and I got the image.

But now I would like to have my file on the other PC: File file = new File("http://192.168.2.11:8080/rest/print/startPrint")

But than I got an error "FileNotFoundException". What is wrong? I guess the path is not valid?

Answer 1

You can use a Restful Client like Resteasy.

    ResteasyClient client = new ResteasyClientBuilder().build();
    ResteasyWebTarget target = client.target("http://localhost:8080/rest/status");
    Response response = target.request().get();
    String value = response.readEntity(String.class);
    System.out.println(value);
    response.close();

Answer 2

File is not suitable for this situation.

To download the image, you have at least two approaches:

Using URL

URL url = new URL("http://192.168.2.11:8080/rest/print/startPrint");
InputStream is = new BufferedInputStream(url.openStream();

Using JAX-RS Client API

Client client = ClientBuilder.newClient();
WebTarget target = client.target("http://192.168.2.11:8080/rest")
                         .path("print")
                         .path("startPrint");
Response response = target.request().get();
InputStream is = response.readEntity(InputStream.class);

---

Since you have an InputStream, just write it to a file:

Path path = Paths.get("C:/temp", "download.png");
Files.copy(is, path);