We Keep Coding

How to encode Post Data JSON in CloseableHttpClient APi

I have used the CloseableHttpClient APi for a Post call and Basic Auth for authorisation
private CloseableHttpClient httpclient = HttpClients.createDefault();
HttpPost httppost = new HttpPost("https://example.com");
MyJson myJson = new MyJson(); //custom java object to be posted as Request Body
Gson gson = new Gson();
String param = gson.toJson(myJson);
StringEntity urlparam = new StringEntity(param);
String credentials = username + ":" + passwprd;
String base64Credentials = new String(Base64.getencoder().encode(credentials.getBytes()));
String authorizartionHeader = "Basic" + base64Credentials;
httppost.setHeader("Content-Type", "application/Json");
httppost.setHeader("Authorization", authorizartionHeader);
urlparam.setContentEncoding("UTF-8");
httppost.setEntity(urlparam);
httpclient.execute(httppost);
I am getting error
"Invalid UTF-8 middle byte"
I have encoded the JSON still the encoding is not working for other locales except English. How to encode the Post data.
I tried using the method
httppost.setEntity(new URLEncodedFormEntity(namevaluePair, "UTF-8")) but I don't have any Namevaluepair and if the add the Username-pswd in that then getting Null pointer response.

You should try to set everything as UTF-8
StringEntity urlparam = new StringEntity(param, StandardCharsets.UTF_8);
And add proper header
httppost.setHeader("Content-Type", "application/json;charset=UTF-8");

Request body in post method java

I am using Apache Commons HttpClient Post method. In post method there are two ways to set request body.
1) setRequestBody(NameValuePair [])
2) setRequestEntity(RequestEntity)
In my case, the input for the above methods would be json Object. How can i send json Object as requestBody ?

You need to use the second option:
httpPost.setHeader("Accept", "application/json");
httpPost.setHeader("Content-type", "application/json");
String json = "{ \"key\" : \"value\" }";
StringEntity entity = new StringEntity(json);
httpPost.setEntity(entity);

Send Array of objects using HttpPost in Android

I have an app that sends an object to an api via HttpPost. I have some sample such:
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(4);
nameValuePairs.add(new BasicNameValuePair("Destination", destination));
nameValuePairs.add(new BasicNameValuePair("Description", description));
nameValuePairs.add(new BasicNameValuePair("CreatorName ", myName));
In this object, I have an array of "User" objects, which has a DisplayName and Phone. How can I send this array through HttpPost? The following is not recognized by the server (where the quotes are escaped):
nameValuePairs.add(new BasicNameValuePair("Users", "[{"Destination":"St.Louis", "Phone":"1234"}]"));

Simplest way is to convert the Array as String (or JSON string). Then encode it with your server after passing as entity.

try this
DefaultHttpClient httpclient = new DefaultHttpClient();
HttpPost httppostreq = new HttpPost(wurl);
StringEntity se = new StringEntity(nameValuePairs.toString());
se.setContentType("application/json;charset=UTF-8");
se.setContentEncoding(new BasicHeader(HTTP.CONTENT_TYPE, "application/json;charset=UTF-8"));
httppostreq.setEntity(se);
HttpResponse httpresponse = httpclient.execute(httppostreq);

I think this code should work.
nameValuePairs.add(new BasicNameValuePair("user[0]", gson.toJson(users.get(0))));
nameValuePairs.add(new BasicNameValuePair("user[1]", gson.toJson(users.get(1))));

Posting to REST api using Java, specifically Android

I'm posting to the Wufoo api inside of an Android app and I am hitting a bit of a snag. My data does not seem to be formatting in a way that the server likes (or there is some other issue). Here is my code (note authkey and authpass are placeholders in the exmaple):
HttpClient httpclient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
String json = "";
JSONObject jsonObject = new JSONObject();
jsonObject.accumulate("Field17", "Some Value");
json = jsonObject.toString();
StringEntity postData = new StringEntity(json, "UTF8");
httpPost.setEntity(postData);
String authorizationString = "Basic " + Base64.encodeToString(
("authkey" + ":" + "authpass").getBytes(),
Base64.NO_WRAP);
httpPost.setHeader("Content-type", "application/json");
httpPost.setHeader("Authorization", authorizationString);
HttpResponse httpResponse = httpclient.execute(httpPost);
inputStream = httpResponse.getEntity().getContent();
The response I get back from the server looks like this:
{"Success":0,"ErrorText":"Errors have been <b>highlighted<\/b> below.","FieldErrors":
[{"ID":"Field17","ErrorText":"This field is required. Please enter a value."}]}
This is the response for a failure (obviously) which leads me to believe I'm doing the authentication correctly, and that it just doesn't like my JSON string, I've looked through the API docs which are located here:
http://www.wufoo.com/docs/api/v3/entries/post/
and by all accounts this should work? Any suggestions?

I would start by looking at this line:
StringEntity postData = new StringEntity(json, "UTF8");
It's "UTF-8", not "UTF8".
Note: I would suggest you using the HTTP.UTF_8 constant in order to avoid this kind of problem again.
StringEntity postData = new StringEntity(json, HTTP.UTF_8);

The Field17 may be of specific field type other than string.

After reading the document, I think you missed the point. The server accepted fields parameter from http post, not from a json string.
Your problem looks like this one.
So your request should like this:
ArrayList<NameValuePair> postParameters = new ArrayList<NameValuePair>();
postParameters.add(new BasicNameValuePair("Field17", "Some Value"));
httpPost .setEntity(new UrlEncodedFormEntity(postParameters));
Hope this can help.

I actually figured this out, this isn't a problem with the code anyone here gave me, it's the fact that I was sending the wrong header info. This must be a quirk of the Wufoo API.
If I use the BasicNameValuePair objects like what was suggestion by R4j and I remove the line
httpPost.setHeader("Content-type", "application/json");
everything works perfectly!
Thanks for all the help and I hope this helps anyone who is having trouble with the Wufoo API and Java.

UrlEncodedFormEntity equivalent in javascript

In java while doing an HTTP post request using nameValuePairs we write the following code!
HttpClient client = new DefaultHttpClient();
HttpPost post = new HttpPost("http://sometesturl.com");
JSONObject json = new JSONObject();
json.put("id",1);
json.put("name","john");
try {
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(1);
nameValuePairs.add(new BasicNameValuePair("data", "abc"));
nameValuePairs.add(new BasicNameValuePair("samplejson", json.toString()));
post.setEntity(new UrlEncodedFormEntity(nameValuePairs));
}
As seen over here we use the UrlEncodedFormEntity to encode our request body. Similarly, I need to do the same in Javascript. I have seen the EncodeURIComponent method but that doesn't seem to encode the request body. Instead it encodes the URL.
Can someone tell me how to encode the request body in javascript?