Http Request using java.net.* package

Question

I am firing API calls through java package java.net.* But, for 400 and above Responses I am not getting the response body. So Not able to figure out why the call is failing.

Below snippet fires the call.

public static String sendPostRequest(String requestUrl, String payload, Map<String, String> requestProperties) {
        StringBuffer jsonString = new StringBuffer();
        try {
            URL url = new URL(requestUrl);
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();

            connection.setDoInput(true);
            connection.setDoOutput(true);
            connection.setRequestMethod("POST");
            Set<String> keys = requestProperties.keySet();
            for (String property : keys) {
                connection.setRequestProperty(property, requestProperties.get(property));
            }
            OutputStreamWriter writer = new OutputStreamWriter(connection.getOutputStream(), StandardCharsets.UTF_8);
            writer.write(payload);
            writer.close();
            BufferedReader br = new BufferedReader(new InputStreamReader(connection.getInputStream()));
            String line;
            while ((line = br.readLine()) != null) {
                jsonString.append(line);
            }
            br.close();
            connection.disconnect();
            //  System.out.println("response  " + jsonString.toString());

        } catch (Exception e) {
            log.error("Error for call " + requestUrl);
            log.error(e.getMessage());
        }
        return jsonString.toString();
    }

Is there any work around?

Rob Spoor · Accepted Answer · 2022-11-28 12:14:46Z

2

For responses with status codes 400 and higher you need to use connection.getErrorStream(). Calling connection.getOutputStream() will throw an exception. You can use connection.getResponseCode() before calling connection.getOutputStream() or connection.getErrorStream() to determine the status, and therefore which of the two methods to use.

answered Nov 28, 2022 at 12:14

Rob Spoor

9,9641 gold badge28 silver badges29 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Http Request using java.net.* package

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related