Java URL - How to avoid "Length Required (411)" Error?

Trying to do a simple POST Request, but am getting the error: "Length Required".

I've tried various approaches including not including the Content-Length (since Java may overwrite it) and issuing a zero-length Content-Length. Below, I am trying another method -- passing the length of the Request string.

Nothing I've tried thus far has worked. Still get the same "Length required".

Suggestions?

String theURL = "https://<the_url>"; byte[] postDataBytes = (theURL).toString() .getBytes("UTF-8"); URL getToken = new URL(theURL); HttpURLConnection conn = (HttpURLConnection) getToken.openConnection(); conn.setRequestMethod("POST"); conn.setRequestProperty ("Authorization", "Basic tc1jdfadfakdjfhalsdjh"); conn.setRequestProperty("content-type", "application/json"); conn.setRequestProperty("Content-Length", String.valueOf(postDataBytes.length)); conn.connect(); String response = conn.getResponseMessage() + " (" + conn.getResponseCode() + ")"; System.out.println(response);

Prints: Length Required (411)

Suggestions?

Thanks,

- mike

How are you sending the content?  Typically you would do something like:conn.setDoOutput(true); OutputStream os = conn.getOutputStream();and then write to the stream.

Ron McLeod wrote:How are you sending the content?  Typically you would do something like:conn.setDoOutput(true); OutputStream os = conn.getOutputStream();and then write to the stream.

Thanks...your suggestion led me to the solution.

-- mike

You shouldn't have to set the Content-Length header. This header is set automatically based on the content you've written to the message body. Of course, this means you have to write the message body, even if it's zero bytes:
try (  var stream = conn.getOutputStream(); ) {  // no need to actually write anything,  // just let the stream open and automatically close }