I am using unity to connect to a server using this code attached to a button click, but I am getting a lot of errors that there aren't semicolons? Why am I getting these errors?
public function BTN_Connect() {
String message;
BufferedReader inFromUser = new BufferedReader(new InputStreamReader(System.in));
Socket clientSocket = new Socket("localhost", 5552);
DataOutputStream outToServer = new DataOutputStream(clientSocket.getOutputStream());
BufferedReader inFromServer = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
message = inFromServer.readLine();
System.out.println("FROM SERVER: " + message);
clientSocket.close();
}
Related
It seems like the server is not receiving the message sent from the client as it should. From my understanding the client is writing to the socket outputstream. And the server is reading from the socket inputstream. Please help.
Server Code:
import java.io.*;
import java.net.ServerSocket;
import java.net.Socket;
public class TCPServer {
static final int DEFAULT_PORTNUMBER = 1236;
public static void main(String[] args){
int portnumber;
if(args.length >= 1){
portnumber = Integer.parseInt(args[0]);
}else{
portnumber = DEFAULT_PORTNUMBER;
}
//Setting a server socket and a possible client socket
ServerSocket server = null;
Socket client;
try{
server = new ServerSocket(portnumber);
} catch (IOException e){
e.printStackTrace();
}
while(true){
try{
System.out.println("Waiting for client...");
client = server.accept();
System.out.println("Client accepted... ");
//Read data form the client
BufferedReader br = new BufferedReader(new InputStreamReader(client.getInputStream()));
while(!br.ready()){
System.out.println("No message from client");
}
String msgFromClient = br.readLine();
//System.out.println("Message received from client = " + msgFromClient);
//Send Response
if(msgFromClient != null && !msgFromClient.equalsIgnoreCase("bye")){
OutputStream clientOut = client.getOutputStream();
PrintWriter pw = new PrintWriter(clientOut, true);
String ansMsg = "Hello, " + msgFromClient;
pw.println(ansMsg);
}
if(msgFromClient != null && msgFromClient.equalsIgnoreCase("Bye")){
server.close();
client.close();
break;
}
} catch(IOException e) {
e.printStackTrace();
}
//New thread for client
/*new ServerThread(client).start();
System.out.println("Client connection accepted... ");*/
}
}
}
Client Code:
import java.io.*;
import java.net.InetAddress;
import java.net.Socket;
public class TCPClient {
static final int DEFAULT_PORTNUMBER = 1236;
public static void main(String args[]){
Socket client = null;
int portnumber;
//Default port number if not specified as an argument
if(args.length >= 1){
portnumber = Integer.parseInt(args[0]);
}else{
portnumber = DEFAULT_PORTNUMBER;
}
try {
String msg = "";
//Creating a client socket
client = new Socket(InetAddress.getLocalHost(), portnumber);
System.out.println("Client socket is created: " + client);
//Creating an output stream for the client socket
OutputStream clientOUt = client.getOutputStream();
PrintWriter pw = new PrintWriter(clientOUt, true);
//Creating an input stream for the client socket
InputStream clientIn = client.getInputStream();
BufferedReader br = new BufferedReader(new InputStreamReader(clientIn));
//Creating a buffered reader for standard input System.in
BufferedReader stdIn = new BufferedReader(new InputStreamReader(System.in));
System.out.println("Enter your name. Type Bye to exit.");
//Read data from standard input and write to output stream
msg = stdIn.readLine().trim();
pw.print(msg);
while(!br.ready()){
//System.out.println("No Input From Server");
}
//Read data from input stream of client socket
System.out.println("Message returned from the server = " + br.readLine());
pw.close();
br.close();
client.close();
//Stop operation
if (msg.equalsIgnoreCase("Bye")) {
System.exit(0);
} else {
}
} catch (IOException e) {
System.out.println("I/O error " + e);
}
}
}
Note: I did disable firewall but that did not help.
Found the answer PrintWriter or any other output stream in Java do not know "\r\n". It describes how printwriter doesn't flush properly with printwriter.print() but rather only works when you use printwriter.println().
I'm trying to use Bing Spatial Data Service of Microsoft by using Java from my server. (I used this code : How to send HTTP request in java?) but it doesnt work at all.
What I want to do: get latitude and longitude from a given adress
public static void main(String[] args) throws IOException {
System.out.println(SendRequete());
}
static String SendRequete(){
String bingMapsKey = "zzzzzzzzzz";
String contentType="text/plain";
String targetURL = "http://dev.virtualearth.net/";
String urlParameters="REST/v1/Locations?countryRegion=France&locality=Paris&postalCode=75001&addressLine=rue%20de%20la%20paix&key=" + bingMapsKey;
System.out.println(targetURL+urlParameters);
try{
HttpURLConnection connection = null;
URL url = new URL(targetURL);
connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("POST");
connection.setRequestProperty("Content-Type", contentType);
connection.setRequestProperty("Content-Length",
Integer.toString(urlParameters.getBytes().length));
connection.setRequestProperty("Content-Language", "en-US");
connection.setUseCaches(false);
connection.setDoOutput(true);
//request
DataOutputStream wr = new DataOutputStream(connection.getOutputStream());
wr.writeBytes(urlParameters);
wr.close();
//Get Response
InputStream is = connection.getInputStream();
BufferedReader rd = new BufferedReader(new InputStreamReader(is));
StringBuffer response = new StringBuffer(); // or StringBuffer if Java version 5+
String line;
while ((line = rd.readLine()) != null) {
System.out.println(line);
response.append(line);
response.append('\r');
}
rd.close();
return response.toString();
} catch (Exception e) {
e.printStackTrace();
return null;
I keep having the same results:
<html><head><title>Object moved</title></head><body>
<h2>Object moved to here.</h2>
</body></html>
</body></html>ed to here.</h2>
ml><head><title>Object moved</title></head><body>
If I copy and paste on y browser it works fine... Any idea of where the problem is
Looks like you are using the Bing Maps REST services not the Bing Spatial Data Services. The REST services can geocode individual locations on demand, while the Spatial Data Services can geocode up to 200,000 locations in a single request.
Assuming you mean the REST services, yes, the URL you are creating is correct. However you are passing in part of the URL as URL parameters when you shouldn't be. Also, you need to make a GET request, not a POST request. Here is a modified version of your code that should work.
static String SendRequete(){
String bingMapsKey = "zzzzzzzzzz";
String contentType="text/plain";
String targetURL = "http://dev.virtualearth.net/";
String urlParameters="REST/v1/Locations?countryRegion=France&locality=Paris&postalCode=75001&addressLine=rue%20de%20la%20paix&key=" + bingMapsKey;
System.out.println(targetURL+urlParameters);
try{
URL url = new URL(targetURL + urlParameters);
URLConnection connection = url.openConnection();
//Get Response
InputStream is = connection.getInputStream();
BufferedReader rd = new BufferedReader(new InputStreamReader(is));
StringBuffer response = new StringBuffer(); // or StringBuffer if Java version 5+
String line;
while ((line = rd.readLine()) != null) {
System.out.println(line);
response.append(line);
response.append('\r');
}
rd.close();
return response.toString();
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
I'm writing a TCP Server and Client, in which the client will send the file and the server will save it. My send/save function is as following:
Server
public void saveFile2(Socket clientSocket) throws IOException
{
BufferedInputStream bis = new BufferedInputStream(clientSocket.getInputStream());
DataInputStream dis = new DataInputStream(bis);
String fileName = dis.readUTF();
File file = new File(fileName);
FileOutputStream fos = new FileOutputStream(file);
BufferedOutputStream bos = new BufferedOutputStream(fos);
int byteCount;
byte[] buffer = new byte[4096];
while ((byteCount = bis.read(buffer, 0, buffer.length)) > 0)
{
System.out.println("Test byteCount = "+byteCount);
bos.write(buffer, 0, byteCount);
break;
}
System.out.println("Saved file"+file.getName());
bos.close();
dis.close();
}
Client
public void sendFile2(String xmlpath) throws IOException, InterruptedException
{
BufferedOutputStream bos = new BufferedOutputStream(s.getOutputStream());
DataOutputStream dos = new DataOutputStream(bos);
File file = new File(xmlpath);
System.out.println("Sending File : " + file.getName());
dos.writeUTF(file.getName());
FileInputStream fis = new FileInputStream(file);
BufferedInputStream bis = new BufferedInputStream(fis);
int bytesCount;
byte[] buffer = new byte[4096];
System.out.println("Sending file to server.");
while ((bytesCount = fis.read(buffer)) > 0 )
{
System.out.println(bytesCount);
bos.write(buffer, 0, bytesCount);
}
System.out.println("Finished sending.");
bis.close();
dos.flush();
}
Notice that I have added a break; command into the while loop of Server and the program work perfectly. But when I exclude it, I get this exception:
Test byteCount = 394
java.net.SocketException: Connection reset
at java.net.SocketInputStream.read(SocketInputStream.java:209)
at java.net.SocketInputStream.read(SocketInputStream.java:141)
at java.io.BufferedInputStream.fill(BufferedInputStream.java:246)
at java.io.BufferedInputStream.read1(BufferedInputStream.java:286)
at java.io.BufferedInputStream.read(BufferedInputStream.java:345)
at xml.xmlServer.saveFile2(xmlServer.java:72)
at xml.xmlServer.run(xmlServer.java:31)
This only occur when I include BufferedInputStream and BufferedOutputStream in my code. Can somebody help me explain what causes this exception ?
You're reading the filename but you aren't sending the filename. You're missing a writeUTF() call in the sender.
You also need to close the socket in the sender, or the DataOutputStream.
bos.write(buffer, 0, bytesCount);
Really this should be
dos.write(buffer, 0, bytesCount);
Can anyone please explain what will be the impact if I dont use disconnect() while using HttpURLConnection. I am sending and recieving data through the connection. and closing the input and output streams. Is that enough or I should explicitely use disconnect().
URL url = new URL(urlname);
HttpURLConnection urlconnection = (HttpURLConnection) url.openConnection();
urlconnection.setRequestMethod("POST");
urlconnection.setDoOutput(true);
urlconnection.setConnectTimeout(s_time);
OutputStreamWriter out = new OutputStreamWriter(urlconnection.getOutputStream());
out.write(postData);
out.close();
BufferedReader in = new BufferedReader(new InputStreamReader(urlconnection.getInputStream()));
String somestring;
while ((somestring = in.readLine()) != null) {
data += somestring;
}
in.close();
I've been working on a portlet that calls Rest API. When the API is called and the requested data doesn't exist, it returns an appropriate error message in JSON format (with Bad request http code - 400), and if the id exists, it returns the requested data in json (with code 200).
How can I get the body of response (that contains error description) because invoking httpConn.getInputStream() method throws exception in case the response is bad request error.
Code:
HttpURLConnection httpConn = null;
URL url = new URL("http://192.168.1.20/personinfo.html?id=30");
URLConnection connection = url.openConnection();
httpConn = (HttpURLConnection) connection;
httpConn.setRequestProperty("Accept", "application/json");
httpConn.setRequestMethod("GET");
httpConn.setRequestProperty("charset", "utf-8");
BufferedReader br = null;
if (!(httpConn.getResponseCode() == 400)) {
br = new BufferedReader(new InputStreamReader((httpConn.getInputStream())));
String output;
StringBuilder builder = new StringBuilder();
System.out.println("Output from Server .... \n");
while ((output = br.readLine()) != null)
builder.append(output);
return builder.toString();
}else
here should catch the error message. :)
In case of non-successful response codes, you have to read the body with HttpURLConnection.getErrorStream().
you can get body of Bad Request in HttpURLConnection using this code :
InputStream errorstream = connection.getErrorStream();
String response = "";
String line;
BufferedReader br = new BufferedReader(new InputStreamReader(errorstream));
while ((line = br.readLine()) != null) {
response += line;
}
Log.d("body of Bad Request HttpURLConnection", "Response: " + response);
Use Apache Httpclient:
String url = "http://192.168.1.6:7003/life/lifews/getFirstInstallment.html?rootPolicyNo=1392/2126/2/106/9995/1904&token=1984";
HttpClient client = HttpClientBuilder.create().build();
HttpGet request = new HttpGet(url);
// add request header
HttpResponse response = client.execute(request);
System.out.println("Response Code : " + response.getStatusLine().getStatusCode());
BufferedReader rd = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));
StringBuffer result = new StringBuffer();
String line = "";
while ((line = rd.readLine()) != null)
result.append(line);
System.out.println(result);