SSL 인증서 없이 https 통신하는 법 예제

SSL 인증서 없이 https 통신하는 법 예제

Server SIde 방식으로 https를 연결할려면 기본적으로 인증서가 필요한것으로 나오고 있다.
인증서 없이 https를 구현 할려면 아래와 같이 하면 가능하다.

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.security.cert.X509Certificate;

import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;

public class GsHttpsClient {

	public static void main(String[] args) {
		String urlStr = "https://www.google.com";
		
		StringBuffer sb = new StringBuffer();

		try {
			TrustManager[] trustAllCerts = new TrustManager[] { new X509TrustManager() {
				public java.security.cert.X509Certificate[] getAcceptedIssuers() {
					return null;
				}

				public void checkClientTrusted(X509Certificate[] certs,
						String authType) {
				}

				public void checkServerTrusted(X509Certificate[] certs,
						String authType) {
				}
			} };

			SSLContext sc = SSLContext.getInstance("SSL");
			sc.init(null, trustAllCerts, new java.security.SecureRandom());
			HttpsURLConnection
					.setDefaultSSLSocketFactory(sc.getSocketFactory());

			URL url = new URL(urlStr);
			HttpURLConnection conn = (HttpURLConnection) url.openConnection();

			InputStreamReader in = new InputStreamReader(
					(InputStream) conn.getContent());
			BufferedReader br = new BufferedReader(in);

			String line;
			while ((line = br.readLine()) != null) {
				sb.append(line).append("\n");
			}

			System.out.println(sb.toString());
			br.close();
			in.close();
			conn.disconnect();

		} catch (Exception e) {
			System.out.println(e.toString());
		}
	}
}