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Difference between Java Post Request and browser post request

I am trying to use api of one popular russian social networks. I am using OAuth via Java HttpUrlConnection. The problem is, when I send post data via Java, I get 401 response code. When I copy request and paste it browser, I get redirect to URL containing access token I need. That means that my post request is correct, but why when I send it with Java I get 401 error? When I send request with incorrect password, I get 200. It means that request is correct too.
private void getHomeAuth() throws Exception {
String url = "https://oauth.vk.com/authorize?client_id=APP_ID&scope=friends&redirect_uri=https://oauth.vk.com/blank.html&display=page&v=5.34&response_type=token";
URL oauth = new URL(url);
HttpURLConnection connection = (HttpURLConnection) oauth.openConnection();
connection.setRequestMethod("GET");
connection.setRequestProperty("User-Agent", USER_AGENT);
int responseCode = connection.getResponseCode();
System.out.println("Response code: " + responseCode);
BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
String inputLine;
StringBuilder response = new StringBuilder();
while((inputLine = reader.readLine()) != null)
response.append(inputLine + "\n");
reader.close();
PrintWriter writer = new PrintWriter("auth.html");
writer.print(response);
writer.close();
parse();
cookies = connection.getHeaderField("Set-Cookie");
referer = connection.getURL().toString();
}
private void postAuth() throws Exception {
email = URLEncoder.encode("example#gmail.com", "UTF-8");
password = "password";
_origin = URLEncoder.encode(_origin, "UTF-8");
String url = "https://login.vk.com/?act=login&soft=1";
URL post = new URL(url);
String urlParameters = "ip_h=" + ip_h + "&_origin=" + _origin + "&to=" + to + "&expire=" + expire + "&email=" + email + "&pass=" + password;
HttpsURLConnection con = (HttpsURLConnection) post.openConnection();
con.setRequestMethod("POST");
con.setRequestProperty("User-Agent", USER_AGENT);
con.setRequestProperty("Cookie", cookies);
con.setDoOutput(true);
DataOutputStream wr = new DataOutputStream(con.getOutputStream());
wr.writeBytes(urlParameters);
wr.flush();
wr.close();
int responseCode = con.getResponseCode();
System.out.println("Sent post. Response code: " + responseCode + "\nRequest: " + post.toString() + urlParameters + "\nRequestMethod: " + con.getRequestMethod());
}
I also tryied to send this request via addon in browser, and the result was correct. I obtained access token from redirect link.
Maybe the problem is that something inside request is incorrect. I have tried to monitor requests from java app, but I failed.

My experience with this kind of problem is that the http request that first authenticates the user also puts cookies (scope varies from case to case) into the response and subsequent http requests are expected to contain those cookies. Look very closely at the complete returned response headers to see what cookies might have been returned.

Java GitHub HTTPS/SSL request gives 404 response

I’m developing a small REST client for Java, and my using GitHub’s API while testing.
I can’t seem to figure out what i’v done wrong, here is the code that makes the https request.
Link to the repo: https://github.com/sigurdsvela/JREST
HttpURLConnection connection = (HttpURLConnection)ourl.openConnection();
if (protocol == Protocol.HTTPS) { //protocol is Protocol.HTTPS
SSLSocketFactory sslsocketfactory = (SSLSocketFactory) SSLSocketFactory.getDefault();
((HttpsURLConnection) connection).setSSLSocketFactory(sslsocketfactory);
}
System.out.println("Sending " + method + " request to " + ourl + "?" + urlParameters);
connection.setRequestMethod(method.getName());
connection.setRequestProperty("Content-Type", "application/json");
connection.setRequestProperty("Content-Length", "" + Integer.toString(urlParameters.toString().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.toString());
wr.flush();
wr.close();
System.out.println("Server responded with " + connection.getResponseCode() + " " + connection.getResponseMessage());
//Get Response
InputStream is = connection.getInputStream();
When I run this code i get a FileNotFound from the last line, and the System.out.println("Server responded whi.... print that the server responded with 404 Not Found.
The System.out.println("Sending " + method.... print out the url its requesting. I’ve copy pasted it into my browser, and then it works fine. Am i making some false assumption? Is there something i have forgotten.
I'm sending a get.
I've also tried to remove the if (protocol == Protocol.HTTPS) condition and have it always be a HttpsURLConnection, instead of casting it. That didn't work either, and I was still getting a 404 with the same message.
The URL I’m testing against, if relevant is:
api.github.com/repos/sigurdsvela/loveletters

Blackberry Push Notification - Not receiving on Device

I am struggling for getting message on devices since last some days. At last I think to take a help from experts.
Below are the steps I have followed.
I have created Push initiator in core java.
note: I am getting response code : 200 OK - I assume that this message reaches to PPG for further processing - But not confirmed.
I have used sample Push Enabled Application for Blackberry Device -
I could able to register and waiting for messages on perticular port. but I am not receiving any messages :(
Now I am helpless, My question is
1. Does I am in right track
2. Is there any way to find out how to debug and where my messages are hanging.
I am waiting for some positive solution. Thanks in advance..
Here is my actual code for Push initiator for J2SE
StringBuffer dataToSend = new StringBuffer();
dataToSend.append("--" + BOUNDARY);
dataToSend.append(" ");
dataToSend.append("Content-Type: application/xml; charset=UTF-8");
dataToSend.append(" ");
dataToSend.append("<?xml version=\"1.0\"?>");
dataToSend
.append("<!DOCTYPE pap PUBLIC \"-//WAPFORUM//DTD PAP 2.1//EN\" \"http://www.openmobilealliance.org/tech/DTD/pap_2.1.dtd\" [<?wap-pap-ver supported-versions=\"2.0\"?>]>");
dataToSend.append("<pap>");
String myPushId = ""+ new Random().nextInt();
dataToSend.append("<push-message push-id=\"" + myPushId
+ "\" source-reference=\"" + applicationID + "\">");
dataToSend.append("<address address-value=\"" + pin + "\"/>");
dataToSend
.append("<quality-of-service delivery-method=\"confirmed\"/>");
dataToSend.append("</push-message>");
dataToSend.append("</pap> ");
dataToSend.append("--" + BOUNDARY);
dataToSend.append(" Content-Encoding: binary ");
dataToSend.append(" Content-Type: text/plain ");
dataToSend.append(" ");
dataToSend.append("X-Wap-Application-Id: " + applicationID);
dataToSend.append(" X-Rim-Push-Type: browser-channel X-Rim-Push-Title: Test X-Rim-Push-Unread-Icon: http://rim.com/icon_new.png ");
dataToSend.append("X-Rim-Push-Read-Icon: http://rim.com/icon_viewed.png ");
dataToSend.append("X-Rim-Delete-URL: http://rim.com/ReceiveDelete ");
dataToSend.append("X-Rim-Transcode-Content: */* ");
dataToSend.append("Cache-Control: max-age=3600 ");
dataToSend.append(msg);
dataToSend.append("--" + BOUNDARY + "--");
dataToSend.append(" ");
printer(dataToSend.toString());
// printer("-------------------------------------------------------------------");
String authInfo = applicationID + ":" + userPW;
String encoding = new sun.misc.BASE64Encoder().encode(authInfo
.getBytes());
// authInfo = Base64.encode(authInfo.getBytes());
authInfo = "Basic " + encoding;
printer(authInfo);
URL url;
HttpURLConnection connection = null;
try {
// Create connection
url = new URL(targetURL);
connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("POST");
connection.setRequestProperty("Content-Type",
"multipart/related; boundary=" + BOUNDARY
+ "; type=application/xml");
connection.setRequestProperty("User-Agent",
"BlackBerry Push Service SDK/1.0");
// / connection.setRequestProperty("Authorization",
// authInfo.getBytes().toString());
connection.setRequestProperty("Authorization", authInfo);
connection.setRequestProperty("Accept",
"text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2");
connection.setRequestProperty("Connection", "keep-alive");
connection.setRequestProperty("Content-Length",
"" + dataToSend.length());
connection.setDoInput(true);
connection.setDoOutput(true);
// Send request
DataOutputStream wr = new DataOutputStream(
connection.getOutputStream());
wr.writeBytes(dataToSend.toString());
wr.flush();
wr.close();
printer("" + connection.getResponseCode());
String response = connection.getResponseMessage();
printer(response);
// return response;

Java HttpURLConnection no cookies at login

I'm currently trying to do a login with HttpURLConnection and then get the session cookies...
I already tried that on some test pages on my own server, and that works perfectly. When i send a=3&b=5 i get 8 as cookie (PHP page adds both together)!
But when i try that at the other page, the output is just the page as if I just sent nothing with POST :(
General suggestions for improvement are welcome! :)
My Code:
HttpURLConnection conn = (HttpURLConnection) new URL(url).openConnection();
conn.setDoInput(true);
conn.setDoOutput(true);
conn.setRequestMethod("POST");
conn.setRequestProperty("useragent", "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/20100101 Firefox/17.0");
conn.setRequestProperty("Connection", "keep-alive");
DataOutputStream out = new DataOutputStream(conn.getOutputStream());
out.writeBytes("USER=tennox&PASS=*****");
out.close();
BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
String line;
String response = new String();
while ((line = in.readLine()) != null) {
response = response + line + "\n";
}
in.close();
System.out.println("headers:");
int i = 0;
String header;
while ((header = conn.getHeaderField(i)) != null) {
String key = conn.getHeaderFieldKey(i);
System.out.println(((key == null) ? "" : key + ": ") + header);
i++;
}
String cookies = conn.getHeaderField("Set-Cookie");
System.out.println("\nCookies: \"" + cookies + "\"");

The cookie path should initially be set with ; Path=/, also needing a Set-Cookie in the request header of the POST.
Better rewrite it all with an HttpClient.

Java HttpURLConnection no cookies

English:
Hello, I'm currently trying to do a login with HttpURLConnection and then get the session cookies...
I already tried that on some test pages on my own server, and that works perfectly. When i send "a=3&b=5" i get "8" as cookie (PHP page adds both together)!
But when i try that at the other page, the output is just the page as if I just sent nothing with POST :(
General suggestions for improvement are welcome! :)
My Code:
HttpURLConnection conn = (HttpURLConnection) new URL(url).openConnection();
conn.setDoInput(true);
conn.setDoOutput(true);
conn.setRequestMethod("POST");
conn.setRequestProperty("useragent", "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/20100101 Firefox/17.0");
conn.setRequestProperty("Connection", "keep-alive");
DataOutputStream out = new DataOutputStream(conn.getOutputStream());
out.writeBytes("USER=tennox&PASS=*****");
out.close();
BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
String line;
String response = new String();
while ((line = in.readLine()) != null) {
response = response + line + "\n";
}
in.close();
System.out.println("headers:");
int i = 0;
String header;
while ((header = conn.getHeaderField(i)) != null) {
String key = conn.getHeaderFieldKey(i);
System.out.println(((key == null) ? "" : key + ": ") + header);
i++;
}
String cookies = conn.getHeaderField("Set-Cookie");
System.out.println("\nCookies: \"" + cookies + "\"");

I see the following possibilities why you don't get a cookie.
server does NOT send cookies at all
server does not use the values PASS and USER
server want to have a session before login.
POST protocol is wrong or incomplete
server expects parameters by GET