[SOLVED] How do I use the Apache HttpClient library to submit a PATCH request with JSON data?

How do I use the Apache HttpClient library to submit a PATCH request with JSON data?

I’m using Apache HTTP client v 4.3.4. How do I submit JSON data to a URL via the PATCH method? I have tried this

    // Create the httpclient
    HttpClient httpclient = HttpClientBuilder.create().build();

    // Prepare a request object
    HttpUriRequest req = null;
    if (method.equals(RequestMethod.PATCH))
    {
        req = new HttpPatch(url);
        req.setHeader("Content-type", "application/json");
        if (jsonData != null)
        {
            final StringEntity stringData = new StringEntity(jsonData.toString());
            req.setEntity(stringData);
        }   // if

but on the “req.setEntity” line, I get the compilation error, “The method is undefined”. Note that my request needs to send the JSON data as is, as opposed to putting it into a name-value param pair.

Solution

You have cast the HttpPatch object is implicity cast to HttpUriRequest in your code.

The HttpUriRequest interface does not support the setEntity method so you need to cast:

((HttpPatch)req).setEntity(stringData);