如何在java中集成签名的URL？

Question

I am trying to use DOLBY.IO's media API to transcode and save the output file to cloud. I have two URLs {URL1:input to dolby; URL2: to store output from dolby}. And both the URLs are signed URLs from the same cloud.

I tried using some java code to accomplish this but in the end I still can't get the result.

Here is the code:

@PostMapping("/transcode")
    public String Video_Transcode1() throws IOException, JSONException {
        OkHttpClient client = new OkHttpClient();
        String data=generate_Access_token( );
        MediaType mediaType = MediaType.parse("application/json");
        RequestBody body = RequestBody.create(mediaType, "{\"inputs\":[{\"source\":\"https://vb-object-storage.ap-south-1.linodeobjects.com/The%20Hindu%20Daily%20News%20Analysis%20__%203rd%20July%202022%20__%20UPSC%20Current%20Affairs%20__%20Prelims%20%2722%20%26%20Mains%20%2722%28360%29.mp4?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Date=20220707T073322Z&X-Amz-SignedHeaders=host&X-Amz-Expires=604799&X-Amz-Credential=ZVADROBVHWLK1FOYT225%2F20220707%2Fap-south-1%2Fs3%2Faws4_request&X-Amz-Signature=0aa4b388ea3197dd8a03253f5f7313b4209b8acf5e0a4308dc5e543801d22c73\"}],\"outputs\":[{\"kind\":\"mp4\",\"destination\":\"https://vb-object-storage.ap-south-1.linodeobjects.com/The%20Hindu%20Daily%20News%20Analysis%20__%203rd%20July%202022%20__%20UPSC%20Current%20Affairs%20__%20Prelims%20%2722%20%26%20Mains%20%2722%28360%29.mp4?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Date=20220707T073322Z&X-Amz-SignedHeaders=host&X-Amz-Expires=604799&X-Amz-Credential=ZVADROBVHWLK1FOYT225%2F20220707%2Fap-south-1%2Fs3%2Faws4_request&X-Amz-Signature=0aa4b388ea3197dd8a03253f5f7313b4209b8acf5e0a4308dc5e543801d22c73\"}]}");
        Request request = new Request.Builder()
          .url("https://api.dolby.com/media/transcode")
          .post(body)
          .addHeader("Accept", "application/json")
          .addHeader("Content-Type", "application/json")
          .addHeader("Authorization","Bearer "+data)
          .build();

        Response response = client.newCall(request).execute();
        return response.toString();
    }

Here the data is generated from another function (ie:Access token)

I have encoded two URLs as json here:

 RequestBody body = RequestBody.create(mediaType, "{\"inputs\":[{\"source\":\"https://vb-object-storage.ap-south-1.linodeobjects.com/The%20Hindu%20Daily%20News%20Analysis%20__%203rd%20July%202022%20__%20UPSC%20Current%20Affairs%20__%20Prelims%20%2722%20%26%20Mains%20%2722%28360%29.mp4?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Date=20220707T073322Z&X-Amz-SignedHeaders=host&X-Amz-Expires=604799&X-Amz-Credential=ZVADROBVHWLK1FOYT225%2F20220707%2Fap-south-1%2Fs3%2Faws4_request&X-Amz-Signature=0aa4b388ea3197dd8a03253f5f7313b4209b8acf5e0a4308dc5e543801d22c73\"}],\"outputs\":[{\"kind\":\"mp4\",\"destination\":\"https://vb-object-storage.ap-south-1.linodeobjects.com/The%20Hindu%20Daily%20News%20Analysis%20__%203rd%20July%202022%20__%20UPSC%20Current%20Affairs%20__%20Prelims%20%2722%20%26%20Mains%20%2722%28360%29.mp4?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Date=20220707T073322Z&X-Amz-SignedHeaders=host&X-Amz-Expires=604799&X-Amz-Credential=ZVADROBVHWLK1FOYT225%2F20220707%2Fap-south-1%2Fs3%2Faws4_request&X-Amz-Signature=0aa4b388ea3197dd8a03253f5f7313b4209b8acf5e0a4308dc5e543801d22c73\"}]}");

Is there any look around to bring the solution.

Answer 1

it looks like both signed URLs might be GET urls?

For the Dolby.io Transcode API, your inputs should be GET signed urls and your outputs should be PUT signed URLs.

Additionally, it also looks like you are using the same input path/filename and output path/filename:

https://vb-object-storage.ap-south-1.linodeobjects.com/The%20Hindu%20Daily%20News%20Analysis%20__%203rd%20July%202022%20__%20UPSC%20Current%20Affairs%20__%20Prelims%20%2722%20%26%20Mains%20%2722%28360%29.mp4

You will want to use different paths for input and output, something like:

https://vb-object-storage.ap-south-1.linodeobjects.com/output/outputfile.mp4

(note the "output" added to the path and the change of the output filename)