URLConnection - Cannot write request body after response has been read

Question

I have an array of objects that i'm trying to POST through to an API. The first object will go through as it should, and then i get:

java.net.ProtocolException: cannot write request body after response has been read

I'm fairly certain it's just the order in which i'm doing things, but i'm still learning Android and have been trying to figure out for an hour and a bit now.

Thought i'd turn to you guys for help! I need to receive each response to the POST so i can psrse it for an ID field to be used later. You'll see im parsing it within my FOR loop, and then storing the ID's in a list that i will cycle through later.

Code for the POST below:

try {
            url = new URL("##Edited Out##");
            conn = (HttpsURLConnection) url.openConnection();

            // Create the SSL connection
            sc = SSLContext.getInstance("TLS");
            sc.init(null, null, new SecureRandom());
            conn.setSSLSocketFactory(sc.getSocketFactory());

            // Use this if you need SSL authentication
            String userpass = "##Edited Out##:##Edited Out##";
            String basicAuth = "Basic " + Base64.encodeToString(userpass.getBytes(), Base64.DEFAULT);
            conn.setRequestProperty("Authorization", basicAuth);
            conn.setRequestProperty("Content-Type", "application/json;odata=verbose");

            // set Timeout and method
            conn.setReadTimeout(7000);
            conn.setConnectTimeout(7000);
            conn.setRequestMethod("POST");
            conn.setDoInput(true);
            conn.setDoOutput(true);

            conn.connect();

            JSONObject juo = new JSONObject();

            for (int i = 0; i<objects.size(); i++){

                juo.put("Field1", "Data for field 1 here");
                juo.put("Field2", "Data for field 2 here");
                juo.put("Field3", "Data for field 3 here");

                wr = new OutputStreamWriter(conn.getOutputStream());
                wr.write(juo.toString());
                wr.flush();
                wr.close();

                Log.d("ITEM STRING", juo.toString());

                BufferedReader br = new BufferedReader(new InputStreamReader(
                        conn.getInputStream(), "utf-8"));
                while ((line = br.readLine()) != null) {
                    sb.append(line + "\n");
                }
                br.close();

                Log.d("HTTP BR", "" + sb.toString());

                jObject = XML.toJSONObject(sb.toString());

                Log.d("JSON OBJECT", jObject.toString());

                JSONObject menuObject = jObject.getJSONObject("entry");
                JSONObject contentObject = menuObject.getJSONObject("content");
                JSONObject propertiesObject = contentObject.getJSONObject("m:properties");
                JSONObject productObject = propertiesObject.getJSONObject("d:Product_Id");
                String retProId = productObject.getString("content");

                partIDs.add(retProId);

                Log.d("PART ID", retProId);
            }

            int HttpResult = conn.getResponseCode();
            Log.d("HTTP RESULT", String.valueOf(HttpResult));
            Log.d("HTTP RESPONSE", conn.getResponseMessage());

        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (KeyManagementException e) {
            e.printStackTrace();
        } catch (ProtocolException e) {
            e.printStackTrace();
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (JSONException e) {
            e.printStackTrace();
        }
        return null;

EDIT: Regarding duplicate comment below The error i'm receiving is slightly different. I understand the principle of it, but my .getRespondeCode is outside of my for loop, and it should be cycling through. But it isn't.

This error happens if objects.size>=2

I need to get the server response string for each object POSTed as it contains an ID i need to parse.

URLConnection - Cannot write request body after response has been read

0 Answers0