DOwnload base64 image on a protected site using Picasso

Question

I tried to use this Android Picasso library, How to add authentication headers? to access a protected image that returns the base64 version of the image. My problem is that the

Answer 1

You need to intercept the answer and change it

OkHttpClient client;
OkHttpClient.Builder builderOkHttpClient;
builderOkHttpClient = new OkHttpClient.Builder();
        builderOkHttpClient.addInterceptor(new Interceptor() {
            @Override
            public Response intercept(Chain chain) throws IOException {
                Request newRequest = chain.request().newBuilder()
                        .build();
                Response response = chain.proceed(newRequest);
                try {
                    MediaType contentType = response.body().contentType();
                    String  base64String = response.body().string().getBytes("UTF-8");
                    base64String  = base64String .replace("data:image/jpeg;base64,", "");
                    byte[] decodedString = Base64.decode(base64String , Base64.DEFAULT);
                    ResponseBody body = ResponseBody.create(contentType, decodedString);
                    response = response.newBuilder().body(body).build();
                } catch (JSONException e) {
                    e.printStackTrace();
                }
                return response;
            }
        });

 int cacheSize = 10 * 1024 * 1024;
        Cache cache = new Cache(context.getCacheDir(), cacheSize);
        builderOkHttpClient.cache(cache);
        client = builderOkHttpClient.build();
        Application.getAppComponent().inject(this);
        picasso = new Picasso.Builder(context)
                .downloader(new OkHttp3Downloader(client))
                .loggingEnabled(true)
                .indicatorsEnabled(true)
                .listener(new Picasso.Listener() {
                              @Override
                              public void onImageLoadFailed(Picasso picasso, Uri uri, Exception exception) {
                                  Log.e("PICASSO", "loading image " + uri);
                                  Log.e("PICASSO ERROR", exception.getMessage());
                              }
                          }
                ).build();

Answer 2

Above answer works great. Then if the base 64 encoded image is further stored inside a JSON Object.

 String jsonData = response.body().string();
 JSONObject Jobject = new JSONObject(jsonData);
 String base64String = (String) Jobject.get("ImageData");