通过HTTP客户端编写curl等效Java代码时遇到的问题

Question

I have a CURL command and that is working fine when i executed it. Below is the curl command . If i am trying to write the same curl command in java using HTTP client i am getting the HTTP 403. I am not able to understand why the same error I am not getting when i executed CURL but in code i am getting . Can someone please help me in fixing my code .

curl -v -X POST "http://iapi-va3.svcmot.com/v1/gui/user.json?appid=4KCPMNRRT4VJBY54V3888YUOLHLICK28" -d '{"providerType":"MOTOID","email":"1234@idmtest.com","password":""}'

Below is my Java Code.

public static void main(String[] args) {

        HttpClient client = new DefaultHttpClient();

        HttpPost post = new HttpPost("http://iapi-va3.svcmot.com/v1/gui/user.json?appid=4KCPMNRRT4VJBY54V3888YUOLHLICK28");
        post.addHeader("User-Agent","curl/7.19.7 (x86_64-redhat-linux-gnu) libcurl/7.19.7 NSS/3.14.0.0 zlib/1.2.3 libidn/1.18 libssh2/1.4.2");
        post.addHeader("Host","iapi-va3.svcmot.com");
        post.addHeader("Accept","curl/7.19.7 (x86_64-redhat-linux-gnu) libcurl/7.19.7 NSS/3.14.0.0 zlib/1.2.3 libidn/1.18 libssh2/1.4.2");
        post.addHeader("Accept", "*/*");
        post.addHeader("Content-Length", "66");
        post.addHeader("Content-Type", "application/x-www-form-urlencoded");

        Header[] headerArray=post.getAllHeaders();
        for(Header h:headerArray)
        {
            System.out.println(h.getName()+"---"+h.getValue());
        }

        try {

            List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
            nameValuePairs.add(new BasicNameValuePair("providerType", "MOTOID"));
            nameValuePairs.add(new BasicNameValuePair("email", "1234@idmtest.com"));
            nameValuePairs.add(new BasicNameValuePair("password", ""));

            post.setEntity(new UrlEncodedFormEntity(nameValuePairs));

            HttpResponse response = client.execute(post);
            System.out.println("\n"+response);
            //System.out.println(response.getStatusLine());

            BufferedReader rd = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));

            String line = "";
            while ((line = rd.readLine()) != null) {
                System.out.println("\n"+line);
            }
        } 
        catch (IOException e) {
            e.printStackTrace();
        }
    }

Answer 1

There is a differnece, that you are sending a json to server from the curl, but in your program you send it as parameters.

Obviously You need to serialise the params as json in your app before sending.