uQzswmaZ

1@GET
2    @Path("/pdfdownload")
3    @Produces("application/pdf")
4    public Response getFile() {
5    File file = new File('/pathToFile'); // in local
6
7    ResponseBuilder response = Response.ok((Object) file);
8    response.header("Content-Disposition", "attachment; filename=file.pdf");
9    return response.build();
10} 
11     
12@GET
13@Path("/pdfdownload")
14@Produces("application/pdf")
15public Response getFile2() {
16    final S3Object s3Object = getAmazonS3Object();// AWS S3
17    final S3ObjectInputStream s3is = s3Object.getObjectContent();
18
19final StreamingOutput stream = new StreamingOutput() {
20    @Override
21    public void write(OutputStream os) throws IOException, WebApplicationException {
22        byte[] read_buf = new byte[1024];
23        int read_len = 0;
24        while ((read_len = s3is.read(read_buf)) > 0) {
25            os.write(read_buf, 0, read_len);
26        }
27        os.close();
28        s3is.close();
29    }
30};
31
32ResponseBuilder response = Response.ok(stream);
33response.header("Content-Disposition", "attachment; filename=file.pdf");
34return response.build();
35}
36
37private S3Object getAmazonS3Object() {
38    AWSCredentials credentials = new BasicAWSCredentials("accesskey",
39            "secretkey");
40    try {
41        AmazonS3 s3 = new AmazonS3Client(credentials);
42        S3Object s3object = s3.getObject(new GetObjectRequest("bucketName", "filename_WithExtension"));
43        return s3object;
44    } catch (AmazonServiceException e) {
45        System.err.println(e.getErrorMessage());
46        System.exit(1);
47    }
48    System.out.println("Done!");
49    return null;
50} 
51     
52<dependency>
53            <groupId>com.sun.jersey</groupId>
54            <artifactId>jersey-server</artifactId>
55            <version>1.8</version>
56        </dependency>
57
58
59<dependency>
60            <groupId>com.amazonaws</groupId>
61            <artifactId>aws-java-sdk</artifactId>
62            <version>1.11.542</version>
63        </dependency>