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Unable to POST, HttpURLConnection defaults to GET

I am trying to POST to a certain endpoint, when the GET method isn't allowed for that URL. When using HTTPURLConnection, I set both the request method to be post and doOutput to be true.
However for some reason, when I put a breakpoint on the InputStream (where it fails due to a missing file), the request method is GET, and doOutput is false (with only doInput being true). This leads to a 404, method not allowed not found, saying no matching handler for method [get]. Why is it ignoring my settings and going on as if I entered nothing?
String result = null;
try {
HttpURLConnection connection = (HttpURLConnection)new URL(baseUrl + getTokenPath).openConnection();
connection.setRequestMethod("POST");
connection.setRequestProperty("Accept-Charset", charset);
connection.setRequestProperty("Accept-Language", "en-US,en;q=0.8");
connection.setRequestProperty("Content-Type",
"application/x-www-form-urlencoded");
connection.setRequestProperty("Authorization", "Basic " + Base64.getEncoder().encodeToString((clientid + ":" + secret).getBytes()));
connection.setDoOutput(true);
DataOutputStream wr = new DataOutputStream (
connection.getOutputStream ());
wr.writeBytes ("grant_type=client_credentials");
wr.flush ();
wr.close ();
InputStream is = connection.getInputStream();
BufferedReader rd = new BufferedReader(new InputStreamReader(is));
String line;
StringBuffer response = new StringBuffer();
while((line = rd.readLine()) != null) {
response.append(line);
response.append('\r');
}
result = response.toString();
rd.close();
} catch (Exception e) {
e.printStackTrace();
}

Do not close DataOutputStream until You read all data from InputStream.
wr.close ();
Closing stream causes You dropping the connection. Flush is enough to send POST request.
wr.flush ();

REST API Client response in java encoding trouble

I have a problem with an API call response in java.
See below the API response of my request, server replies with content that is unreadable as text:
Here is my code:
String urlt = "xxxxxx";
URL url = new URL(urlt);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("GET");
conn.setRequestProperty("Connection", "Keep-Alive");
conn.addRequestProperty("Accept-Encoding", "gzip");
conn.addRequestProperty("User-Agent", "okhttp/3.4.1");
if (conn.getResponseCode() != 200) {
throw new RuntimeException("Failed : HTTP error code : "
+ conn.getResponseCode());
}
BufferedReader br = new BufferedReader(new InputStreamReader(
(conn.getInputStream())));
String output;
System.out.println("Output from Server .... \n");
while ((output = br.readLine()) != null) {
System.out.println(output);
}
conn.disconnect();
and an example of response headers:

With the following line, you tell the server that you are ready to accept a compressed response:
conn.addRequestProperty("Accept-Encoding", "gzip");
As shown in picture of response headers, the server obliges and gives you gzip-encoded (compressed) content.
But then you proceed to read the response, assuming it's just text... so yeah it prints as garbage in your console.
Either you remove that header above, or be ready to uncompress gzipped content.

IOException when trying to read http connection response

I'm submitting the request below in Java via a Websphere Portlet.
It works fine when I submit manually using postman (chrome extension) but cannot get it to succeed via java.
What am I missing?
I imported the SSL cert from remote host into Websphere, so SSL connections are not the issue.
Exception in logs ..
[7/15/14 23:06:39:993 BST] 00000170 ServletWrappe E com.ibm.ws.webcontainer.servlet.ServletWrapper service CWSRV0014E: Uncaught service() exception root cause MyApp: java.io.IOException: Server returned HTTP response code: 500 for URL: https://server.com/msg
This is the java code invoking the request and trying to read the response ..
URL url = new URL("https://server.com/msg");
URLConnection connection = url.openConnection();
connection.setRequestProperty("Content-Type", "application/json");
connection.setDoOutput(true);
String body = URLEncoder.encode("{\"x\": \"hello\"}", "UTF-8");
OutputStreamWriter out = new OutputStreamWriter(connection.getOutputStream());
out.write(body);
out.close();
// Exception occurs here ..
BufferedReader rd2 = new BufferedReader(new InputStreamReader(connection.getInputStream()));
while ((line = rd2.readLine()) != null) {
result += line;
}
rd2.close();

This was solution, to not URLEncoder.encode() the POST body ..
URL url = new URL(queries.getQuery(sessionBean.getSelectedQuery()));
URLConnection connection = url.openConnection();
connection.setRequestProperty("Content-Type", "application/json");
connection.setDoOutput(true);
String json = "{\"x\": \"hello\"}";
OutputStreamWriter out = new OutputStreamWriter(connection.getOutputStream());
out.write(json);
out.close();
BufferedReader rd2 = new BufferedReader(new InputStreamReader(connection.getInputStream()));
while ((line = rd2.readLine()) != null) {
result += line;
}
rd2.close();

Send POST data from JSP page to remote PHP server (and get an answer)

I'm trying to send some data from a JSP page to a PHP one (which should execute some code and return a success message).
I'm using this java function to make some tests:
public String excutePost(String targetURL, String urlParameters)
{
URL url;
HttpURLConnection connection = null;
try {
//Create connection
url = new URL(targetURL);
connection = (HttpURLConnection)url.openConnection();
connection.setRequestMethod("POST");
connection.setRequestProperty("Content-Type",
"application/x-www-form-urlencoded");
connection.setRequestProperty("Content-Length", "" +
Integer.toString(urlParameters.getBytes().length));
connection.setRequestProperty("Content-Language", "en-US");
connection.setUseCaches (false);
connection.setDoInput(true);
connection.setDoOutput(true);
//Send request
DataOutputStream wr = new DataOutputStream (
connection.getOutputStream ());
wr.writeBytes (urlParameters);
wr.flush ();
wr.close ();
//Get Response
InputStream is = connection.getInputStream();
BufferedReader rd = new BufferedReader(new InputStreamReader(is));
String line;
StringBuffer response = new StringBuffer();
while((line = rd.readLine()) != null) {
response.append(line);
response.append('\r');
}
rd.close();
return response.toString();
} catch (Exception e) {
e.printStackTrace();
return null;
} finally {
if(connection != null) {
connection.disconnect();
}
}
}
String urlParameters =
"var=" + URLEncoder.encode("varcontent", "UTF-8");
out.println(excutePost("remoteurl",urlParameters));
Now if i run the page i get the response "null" and none of the code in the php page is executed.
Am I doing something wrong? How can I allow the php page to run the code in it?
Isn't a simple echo $_POST['var'] enough to send the data back to the jsp page?
EDIT: I tried to see if the php page is receiving something by writing the posted variable in a file. But nothing is written in it.
$file = 'debug.txt';
echo file_put_contents($file, $_POST['var']);
and here is the exception i'm getting..
java.net.SocketException: Connection reset

No, an echo is not enough. Put $_POST['var'] in say a text file and serve the updated text file (Edit the text file each time you need to keep track of $_POST['var']). Alternatively you can put it in some DB and check for changes.

Manually hitting a SOAP Service in Java, getting IO.FileNotFound exception

I need to access a .Net SOAP Service manually. All the importers have issues with its WSDL, so I'm just manually creating the XML message, using HttpURLConnection to connect, and then parsing the results. I've wrapped the Http/SOAP call into a function that is supposed to return the results as a string. Here's what I have:
//passed in values: urlAddress, soapAction, soapDocument
URL u = new URL(urlAddress);
URLConnection uc = u.openConnection();
HttpURLConnection connection = (HttpURLConnection) uc;
connection.setDoOutput(true);
connection.setDoInput(true);
connection.setRequestMethod("POST");
connection.setRequestProperty("SOAPAction", soapAction);
connection.setRequestProperty("User-Agent","Mozilla/5.0 ( compatible ) ");
connection.setRequestProperty("Accept","[star]/[star]");
connection.setRequestProperty("Content-Type", "text/xml; charset=utf-8");
OutputStream out = connection.getOutputStream();
Writer wout = new OutputStreamWriter(out);
//helper function that gets a string from a dom Document
String xmldata = XmlUtils.GetDocumentXml(soapDocument);
wout.write(xmldata);
wout.flush();
wout.close();
// Response
int responseCode = connection.getResponseCode();
BufferedReader rd = new BufferedReader(new InputStreamReader(connection.getInputStream()));
String responseString = "";
String outputString = "";
//Write the SOAP message response to a String.
while ((responseString = rd.readLine()) != null) {
outputString = outputString + responseString;
}
return outputString;
My problem is on the line BufferedReader rd = new BufferedReader(new InputStreamReader(connection.getInputStream())); I get a "java.io.FileNotFoundException" with the address that I'm using (i.e. urlAddress). If I paste that address into a browser, it pulls up the Soap Service webpage just fine (address is http://protectpaytest.propay.com/API/SPS.svc). From what I've read, the FileNotFoundException is if the HttpURLConnection returns a 400+ error message. I added the line getResponseCode() just to see what the exact code was, and it's 404. I added the User-Agent and Accept headers from some other pages saying they were needed, but I'm still getting 404.
Are there other headers I'm missing? What else do I need to do to get this call to work (since it works in a browser)?
-shnar