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Testing HTTP / HTTPs Urls with Java
This recipe provides a Java application to test urls by utilizing protocols supported by your Java Virtual Machine.
The following program provides the following features:
- by default the following url is connected: http://www.linux-support.com/test/test.txt
- by adding a url as an optional parameter you are able to connect http and https services
- just trusted https services are supported
- received contents are printed to stdout
If you are interested in connection HTTPs services signed by unofficial CAs or self-signed certificates you should take a look at article Custom SSL Certificates and HTTPs with Java Clients.
The Application
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package testit; import java.io.BufferedReader;import java.io.InputStream;import java.io.InputStreamReader;import java.net.HttpURLConnection;import java.net.URL; import javax.net.ssl.HttpsURLConnection;import javax.net.ssl.SSLSocketFactory; /** Connect to a HTTP or HTTPS server (runs with Java 5 and Java 6). * @author marioscondo * * Copyright 2010, Linux-Support.com */public class HttpsTest { /** * @param args provide an optional url */ public static void main(String[] args) { // main method - this is the entry point for running this application HttpsTest app = new HttpsTest(); try { // fetch a url from command line or use a default one String url = "http://www.linux-support.com/test/test.txt"; if (args.length > 0) { url = args[0]; } System.out.println("connecting to: " + url); // fetch remote data app.doit(url); } catch (Exception e) { e.printStackTrace(); } } // connect to the server void doit(String url_str) throws Exception { InputStream inputstream = null; if (url_str.startsWith("http://")) { URL url = new URL(url_str); HttpURLConnection conn = (HttpURLConnection) url.openConnection(); inputstream = conn.getInputStream(); } else { SSLSocketFactory sslsocketfactory = (SSLSocketFactory) SSLSocketFactory.getDefault(); URL url = new URL(url_str); HttpsURLConnection conn = (HttpsURLConnection) url.openConnection(); conn.setSSLSocketFactory(sslsocketfactory); inputstream = conn.getInputStream(); } InputStreamReader inputstreamreader = new InputStreamReader(inputstream); BufferedReader bufferedreader = new BufferedReader(inputstreamreader); String string = null; System.out.println("connection was successful."); System.out.println("received data:"); while ((string = bufferedreader.readLine()) != null) { System.out.println("Received " + string); } }}
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package testit; import java.io.BufferedReader;import java.io.InputStream;import java.io.InputStreamReader;import java.net.HttpURLConnection;import java.net.URL; import javax.net.ssl.HttpsURLConnection;import javax.net.ssl.SSLSocketFactory; /** Connect to a HTTP or HTTPS server (runs with Java 5 and Java 6). * @author marioscondo * * Copyright 2010, Linux-Support.com */public class HttpsTest { /** * @param args provide an optional url */ public static void main(String[] args) { // main method - this is the entry point for running this application HttpsTest app = new HttpsTest(); try { // fetch a url from command line or use a default one String url = "http://www.linux-support.com/test/test.txt"; if (args.length > 0) { url = args[0]; } System.out.println("connecting to: " + url); // fetch remote data app.doit(url); } catch (Exception e) { e.printStackTrace(); } } // connect to the server void doit(String url_str) throws Exception { InputStream inputstream = null; if (url_str.startsWith("http://")) { URL url = new URL(url_str); HttpURLConnection conn = (HttpURLConnection) url.openConnection(); inputstream = conn.getInputStream(); } else { SSLSocketFactory sslsocketfactory = (SSLSocketFactory) SSLSocketFactory.getDefault(); URL url = new URL(url_str); HttpsURLConnection conn = (HttpsURLConnection) url.openConnection(); conn.setSSLSocketFactory(sslsocketfactory); inputstream = conn.getInputStream(); } InputStreamReader inputstreamreader = new InputStreamReader(inputstream); BufferedReader bufferedreader = new BufferedReader(inputstreamreader); String string = null; System.out.println("connection was successful."); System.out.println("received data:"); while ((string = bufferedreader.readLine()) != null) { System.out.println("Received " + string); } }} |
Sample Output
The following listing provides an example how the application ist working.
# run with default configuration (http)$ java testit.HttpsTestconnecting to: http://www.linux-support.com/test/test.txtconnection was successful.received data:Received This is a text message provided for testing Received purposes by http(s)://www.linux-support.com.Received Received Data location:Received http://www.linux-support.com/test/test.txtReceived https://www.linux-support.com/test/test.txtReceived # run with optional parameter (https)$ java testit.HttpsTest https://secure.wikimedia.org/ | head -7connecting to: https://secure.wikimedia.org/connection was successful.received data:Received <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">Received <html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">Received <head>Received <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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