REST HttpURLConnection

Question

I am working on a REST Client experimenting with the tinkerpop database using using HttpURLConnection.

I am trying to send over a 'GET - CONNECT'. Now I understand (from some net research) that if I use doOutput(true) the 'client' will a 'POST' even if I setRequestMethod 'GET' as POST is the default (well ok?) however when I comment out the the doOutput(true) I get this error:

java.net.ProtocolException: cannot write to a URLConnection if doOutput=false - call setDoOutput(true) at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:995) at RestContent.handleGetConnect(RestContent.java:88) at RestClient.main(RestClient.java:42)`

Here is the communication code snip I have tried various option with setUseDoOutPut().

//connection.setDoInput(true); connection.setUseCaches (false); connection.setDoOutput(true); connection.setAllowUserInteraction(false); // set GET method try { connection.setRequestMethod("GET"); } catch (ProtocolException e1) { e1.printStackTrace(); connection.disconnect(); }

Exception at connection.setRequestMethod("GET") in the other case. Any hints?

try conn.setDoOutput(false); Also see: stackoverflow.com/questions/6341602/… — Macchiatow
– Macchiatow, Commented Sep 25, 2013 at 15:27
What do you want to send? Is GET - CONNECT the body you want to send? — hgoebl
– hgoebl, Commented Jan 2, 2014 at 11:14
Why are you writing a body to a GET request? What is wrong with using POST? — user207421
– user207421, Commented Jun 18, 2019 at 7:08

Optional · Accepted Answer · 2013-09-26 09:40:33Z

Following code works fine: URL is a Rest URL with supported GET operation.

 HttpURLConnection connection = (HttpURLConnection) url.openConnection(); connection.setRequestMethod("GET"); //connection.setDoOutput(true); InputStream content = (InputStream) connection.getInputStream(); BufferedReader in = new BufferedReader(new InputStreamReader(content)); String line; while ((line = in.readLine()) != null) { System.out.println(line); }

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