Posting a File and Associated Data to a RESTful WebService preferably as JSON

Question

This is probably going to be a stupid question but I\'m having one of those nights. In an application I am developing RESTful API and we want the client to send data as JSON

Answer 1

You could try using https://square.github.io/okhttp/ library. You can set the request body to multipart and then add the file and json objects separately like so:

MultipartBody requestBody = new MultipartBody.Builder()
                .setType(MultipartBody.FORM)
                .addFormDataPart("uploadFile", uploadFile.getName(), okhttp3.RequestBody.create(uploadFile, MediaType.parse("image/png")))
                .addFormDataPart("file metadata", json)
                .build();

        Request request = new Request.Builder()
                .url("https://uploadurl.com/uploadFile")
                .post(requestBody)
                .build();

        try (Response response = client.newCall(request).execute()) {
            if (!response.isSuccessful()) throw new IOException("Unexpected code " + response);

            logger.info(response.body().string());