Question

I trying to make http – post call.
The server that i send him this request need to have two parameters
1. first parameter is Int
2. second parameter is enum that i sending as string

I try to do it in two ways and them both fail:

First way:

 List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);  
 nameValuePairs.add(new BasicNameValuePair("intVal", "-100")); 
 nameValuePairs.add(new BasicNameValuePair("enumVal", "enumAsString"));  
 httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs)); 

I get ‘bar request’ as a response.

Second way:

      DefaultHttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(SERVER_ADDRESS + METHOD_NAME);
try
{
     HttpParams postParams = new BasicHttpParams();
           postParams.setIntParameter("intVal", -100 ); 
           postParams.setParameter   ("enumVal" , "enumAsString" ); 

           httppost.setParams(postParams);

           HttpResponse p = httpclient.execute(httppost);
      }
      catch(Exception e) 
      {

                  .... 

      }

In this way i see that the server get the parameters – but the first parameter ( that need to be int ) is 0 and the second parameter ( that need to be enum ) is 0 also.

P.S : The code that run on the server is WCF code – using REST.

Please .. i must solve this issue …

Thanks.

Answer 1

Here is two different ways which you can send param with HttpPost and HttpUrlConnection using Andorid :

First Way :

HttpClient httpclient;
HttpPost httppost;
ArrayList<NameValuePair> postParameters;
httpclient = new DefaultHttpClient();
httppost = new HttpPost("your login link");


postParameters = new ArrayList<NameValuePair>();
postParameters.add(new BasicNameValuePair("param1", "param1_value"));
postParameters.add(new BasicNameValuePair("param2", "param2_value"));

httppost.setEntity(new UrlEncodedFormEntity(postParameters));

HttpResponse response = httpclient.execute(httppost);

The second way is :

        String charset = "UTF-8";
    String query = String.format("debug_data=%s&"
                            + "client_auth_hash=%s&" 
                            + "timestamp=%s&"
                            + "client_api_ver=%s&",
                            URLEncoder.encode("1", charset),
                            URLEncoder.encode(hash, charset),
                            URLEncoder.encode(timeStamp, charset),
                            URLEncoder.encode(clientApiVersion, charset));

        System.setProperty("http.keepAlive", "false");
        HttpURLConnection connection = (HttpURLConnection) new URL(url).openConnection();
        connection.setDoOutput(true);
        connection.setConnectTimeout(5000); //miliseconds
        connection.setRequestMethod("POST");
        connection.setRequestProperty("Charset", charset);
        connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded;charset=" + charset);
        OutputStream output = null;
        try {
            output = connection.getOutputStream();
            output.write(query.getBytes(charset));
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (output != null)
                try {
                    output.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
        }

        int status = ((HttpURLConnection) connection).getResponseCode();
        Log.d("", "Status : " + status);

        for (Entry<String, List<String>> header : connection
                .getHeaderFields().entrySet()) {
            Log.d("Headers",
                    "Headers : " + header.getKey() + "="
                            + header.getValue());
        }

        InputStream response = new BufferedInputStream(connection.getInputStream());

        int bytesRead = -1;
        byte[] buffer = new byte[30 * 1024];
        while ((bytesRead = response.read(buffer)) > 0) {
        //read the response in pieces if it's needed
            byte[] buffer2 = new byte[bytesRead];
        }
        connection.disconnect();
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    }

The both ways are working properly.