Call the dialog url

[wmashal]

Hi
I am trying to send http request to the dialog i succeed with curl but i dotn know why its not working in java code I am always recieve 400 code when I am trying to pass teh message and the conversation_id

This is my code
please advice ?
``public String doApiRequest(String text, String token, String language, URL obj,boolean conversation) throws RecastException {
HttpURLConnection con=null;
OutputStream os;
int responseCode = 0;
String inputLine;
StringBuffer responseBuffer;
String recastJson;

    try {

        con = (HttpURLConnection) obj.openConnection();

        con.setRequestMethod("POST");
        con.setRequestProperty("Authorization", "Token " + token);
        con.setDoOutput(true);
        os = con.getOutputStream();
        if(conversation){
            JSONObject messageJson = new JSONObject();
            messageJson.put("message","{\"content\":\""+text+"\",\"type\":\"text\"}");
            messageJson.put("conversation_id","fgbotconv123456");
            
            os.write(messageJson.toString().getBytes());
        }

        text = "text=" + text;
        os.write(text.getBytes());

        if (language != null) {
            String l = "&language=" + language;
            os.write(l.getBytes());
        }
        os.flush();
        os.close();

        responseCode = con.getResponseCode();
    } catch (MalformedURLException e) {
        throw new RecastException("Invalid URL", e);
    } catch (IOException e) {
        throw new RecastException("Unable to read response from Recast", e);
    } catch (JSONException e) {
        e.printStackTrace();
    }

    if (responseCode == HttpURLConnection.HTTP_OK) {
        try {
            BufferedReader reader = new BufferedReader(new InputStreamReader(con.getInputStream()));
            responseBuffer = new StringBuffer();
            while ((inputLine = reader.readLine()) != null) {
                responseBuffer.append(inputLine);
            }
            reader.close();
        } catch (IOException e) {
            throw new RecastException("Unable to read response from Recast", e);
        }
        recastJson = responseBuffer.toString();
    } else {
        System.out.println(responseCode);
        throw new RecastException(responseCode);
    }
    return recastJson;
}``