I am posting a Message to a Rest WEB Service using standars java.net package . This is the way i was contacting the web service and posting my request to it .
package com;
import java.io.IOException;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
public class NetClientPost {
public static void main(String[] args) {
HttpURLConnection conn = null;
OutputStream os = null;
try {
URL url = new URL("http://localhost:8080/RestTest/ajax/user_info");
conn = (HttpURLConnection) url.openConnection();
// System.out.println(conn.getResponseCode());
conn.setDoOutput(true);
conn.setRequestMethod("POST");
conn.setRequestProperty("Content-Type", "application/json");
String input = "{\"qty\":100,\"name\":\"sdsfds 4\"}";
os = conn.getOutputStream();
os.write(input.getBytes());
os.flush();
conn.getInputStream();
}
catch (Exception e) {
e.printStackTrace();
}
finally {
try {
os.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
conn.disconnect();
}
}
}
my concern is that if the service is up and running only , i want to post the request to it or else not .
Please tell me if that is possible to check or not ??
thanks in advance .
You can try to establish a socket connection to the host. If the socket is running well your request should work.
Just a really short example:
Socket client;
try{
client = new Socket("localhost", 8080);
// Do your stuff
} catch(Exception e) {
System.out.println("Error");
}
Documentation: https://developer.android.com/reference/java/net/Socket.html
There are a lot of Socket examples and I hope this approach helps you with your problem.
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