SendGrid StackMob - Build URL and POST

gistfile1.java

//Encode any parameters that need encoding (i.e. subject, toname, text)
try {
  subject = URLEncoder.encode(subject, "UTF-8");
  text = URLEncoder.encode(text, "UTF-8");
  toname = URLEncoder.encode(toname, "UTF-8");

} catch (UnsupportedEncodingException e) {
  logger.error(e.getMessage(), e);
}
    
String queryParams = "api_user=" + API_USER + "&api_key=" + API_KEY + "&to=" + to + "&toname=" + toname + "&subject=" + subject + "&text=" + text + "&from=" + from;

url =  "https://www.sendgrid.com/api/mail.send.json?" + queryParams;
 
Header accept = new Header("Accept-Charset", "utf-8");
Header content = new Header("Content-Type", "application/x-www-form-urlencoded");
    
Set<Header> set = new HashSet();
set.add(accept);
set.add(content);
  
try {  
  HttpService http = serviceProvider.getHttpService();
      
  PostRequest req = new PostRequest(url,set,body);
            
  HttpResponse resp = http.post(req);
  responseCode = resp.getCode();
  responseBody = resp.getBody();
                
} catch(TimeoutException e) {
    ...
}