I have an application running on a server. Once a user is trying to connect to the server he sends a GET request. Based on the username and password passed in the request the server authenticates the user.
I am able to connect to the server using a client code that is written in java. The code i use to generate the GET request is:
private String GETrequest(String nMountpoint, String nUsername, String nPassword){
String requestmsg = "";
requestmsg += "GET /" + nMountpoint + " HTTP/1.0\r\n";
requestmsg += "Host: " + nServer +"\r\n";
requestmsg += "User-Agent: NTRIP Client v1\r\n";
requestmsg += "Ntrip-Version: Ntrip/2.0\r\n";
requestmsg += "Accept: */* \r\n";
requestmsg += "Connection: close\r\n";
if (nUsername.length() > 0) {
requestmsg += "Authorization: Basic " + Base64.getEncoder().encodeToString((nUsername + ":" + nPassword).getBytes(StandardCharsets.UTF_8)) + "\r\n\r\n";
}
return requestmsg;
}
When the request arrives to the server and it processes it I receive the next output:
GET /mP HTTP/1.0
Host: host.address.net
User-Agent: NTRIP Client v1
Ntrip-Version: Ntrip/2.0
Accept: */*
Connection: close
Authorization: Basic dGVzdHVzZXI6dGVzdHBhc3M=
checking credentials
dGVzdHVzZXI6dGVzdHBhc3M=
lavrovson:exotech
User: testuser, Pass: testpass
The server decoded the message as planed and the process keeps running. However, when i try to connect to the server using an android app the process on the server side stuck. The code i use to generate the GET request on android is:
private String GETrequest(String nMountpoint, String nUsername, String nPassword){
String requestmsg = "";
requestmsg += "GET /" + nMountpoint + " HTTP/1.0\r\n";
requestmsg += "Host: " + nServer +"\r\n";
requestmsg += "User-Agent: NTRIP Client v1\r\n";
requestmsg += "Ntrip-Version: Ntrip/2.0\r\n";
requestmsg += "Accept: */* \r\n";
requestmsg += "Connection: close\r\n";
if (nUsername.length() > 0) {
String usps = nUsername + ":" + nPassword;
byte[] bt = null;
try {
bt = usps.getBytes("UTF-8");
} catch (UnsupportedEncodingException e) {e.printStackTrace();}
String base64 = Base64.encodeToString(bt, Base64.DEFAULT);
requestmsg += "Authorization: Basic " + base64 + "\r\n\r\n";
}
return requestmsg;
}
When the request arrives to the server and it tries to decode it i receive the next output:
GET /mP HTTP/1.0
Host: host.address.net
User-Agent: NTRIP Client v1
Ntrip-Version: Ntrip/2.0
Accept: */*
Connection: close
Authorization: Basic dGVzdHVzZXI6dGVzdHBhc3M=
checking credentials
dGVzdHVzZXI6dGVzdHBhc3M=
The process gets stuck on the decoding of the Base64 encoded string. When trying to decode the encoded string on the server i use the next code:
byte[] valueDecoded = Base64.getDecoder().decode(decodedString);
String UserPass = new String(valueDecoded, StandardCharsets.UTF_8);
String[] UP = UserPass.split(":");
EDIT: Some additional server code:
private void messageParsing(byte[] bt){
String MSG = new String(bt);
if (bt.length > 4){
System.out.println(MSG);
}
String tokens[] = MSG.split(" ");
// GET request parsing
if (tokens[0].matches("GET") && tokens[1].length()>1){
if (secure){
if(conn_logger.isTraceEnabled()){
conn_logger.trace("Client at adress " + secureSocket.getRemoteSocketAddress());
}
} else {
if(conn_logger.isTraceEnabled()){
conn_logger.trace("Client at adress " + socket.getRemoteSocketAddress());
}
}
System.out.println("checking credentials");
chekCredentials(tokens);
}
}
The checkCredentials method :
private void chekCredentials(String[] tokens){
String[] encoded = tokens[tokens.length-1].split("\r\n");
System.out.println(encoded[0]);
byte[] valueDecoded = Base64.getDecoder().decode(encoded[0]);
System.out.println(new String(valueDecoded));
String UserPass = new String(valueDecoded, StandardCharsets.UTF_8);
String[] UP = UserPass.split(":");
System.out.println("User: " + UP[0] + ", Pass: " + UP[1]);
// Some stuff to do with user/password
.
.
.
}
So the question is why does the server code isn't able to decode the base64 encoded string that is coming from the android app? Am i doing something wrong with the encoding process on the android side? Any help would be appreciated. Thank you.
