OkHttpClient client = new OkHttpClient().newBuilder()
.build();
MediaType mediaType = MediaType.parse("text/plain");
RequestBody body = new MultipartBody.Builder().setType(MultipartBody.FORM)
.addFormDataPart("data ","/C:/1.json",
RequestBody.create(MediaType.parse("application/octet-stream"),
new File("/C:/1.json")))
.build();
Request request = new Request.Builder()
.url(link)
.method("POST", body)
.addHeader("Authorization", "Basic XXX")
.addHeader("Cookie", "csrftoken=XXX")
.build();
Response response = client.newCall(request).execute();