title: How to avoid sending 2 duplicate POST requests to a webservice
body: <p>I send a POST request to create an object. That object is created successfully on the server, but I cannot receive the response (dropped somewhere), so I try to send the POST request again (and again). The result is there are many duplicated objects on the server side.</p>
  
  <p>What is the official way to handle that issue? I think it is a very common problem, but I don't know its exact name, so cannot google it. Thanks.</p>