Java http, https URL 접근 및 response xml data 읽기

HashMap<String, String> rtnMap = new HashMap<String, String>();

URL url;

HttpURLConnection connection = null;

HttpsURLConnection conn = null;

BufferedReader br = null;

StringBuffer strXMLbuf = new StringBuffer();

try{

String strUrl = SystemEnvironment.getInstance().getEnviroment().getOtpUrl();

InputStream in = null;

if(strUrl.indexOf("https://") > -1) // https 통신(ssl)

{

url = new URL(SystemEnvironment.getInstance().getEnviroment().getOtpUrl()+"?userId="+(URLEncoder.encode(userId, "utf-8"))+"&otpValue="+otpVal);

conn = (HttpsURLConnection)url.openConnection();  

// Set Hostname verification  

conn.setHostnameVerifier(new HostnameVerifier() {  

@Override

public boolean verify(String arg0, SSLSession arg1) { return true; }  

});  

// Post 방식 

conn.setDoInput(true);

conn.setDoOutput(true);

conn.setUseCaches(false);

conn.setRequestMethod("POST");

// SSL setting  

SSLContext context = SSLContext.getInstance("TLS");  

context.init(null, new TrustManager[] { new X509TrustManager() {  

@Override

public void checkClientTrusted( java.security.cert.X509Certificate[] arg0, String arg1) throws java.security.cert.CertificateException {

}

@Override

public void checkServerTrusted( java.security.cert.X509Certificate[] arg0, String arg1) throws java.security.cert.CertificateException {

}

@Override

public java.security.cert.X509Certificate[] getAcceptedIssuers() { return null;}  

} }, null);  

conn.setSSLSocketFactory(context.getSocketFactory());  

// Connect to host

conn.connect();  

conn.setInstanceFollowRedirects(true);  

in = conn.getInputStream();  

}

else // http 통신

{

url = new URL(strUrl+"?userId="+(URLEncoder.encode(userId, "utf-8"))+"&otpValue="+otpVal);

connection = (HttpURLConnection)url.openConnection();

// Post 방식 

connection.setDoInput(true);

connection.setDoOutput(true);

connection.setUseCaches(false);

connection.setRequestMethod("POST");

in = connection.getInputStream();

}

br = new BufferedReader(new InputStreamReader(in, "euc-kr"));

String buf = "";

int tmpIdx = 0;

while((buf = br.readLine()) != null){

if(buf == null) break;

strXMLbuf.append(buf).append("\n");

tmpIdx ++;

if(tmpIdx > 100)break; // 무한루프 막기 위함

}

DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();

DocumentBuilder builder = factory.newDocumentBuilder();

org.w3c.dom.Document doc = builder.parse(new InputSource(new StringReader(strXMLbuf.toString())));

doc.getDocumentElement().normalize();

rtnMap.put("resultCode", doc.getElementsByTagName("resultCode").item(0).getChildNodes().item(0).getNodeValue());

rtnMap.put("resultMsg", doc.getElementsByTagName("resultMsg").item(0).getChildNodes().item(0).getNodeValue());

// result xml data 는 아래와 같다.

// <xml><resultCode>0</resultCode><resultMsg>성공</resultMsg></xml>

} catch (Exception e) {

logger.error("checkOTP Exception ["+e.getMessage()+"]");

return null;

} finally{

try{

if(br != null) br.close();

if(conn != null) conn.disconnect();

if(connection != null) connection.disconnect();

}catch(Exception e){

e.printStackTrace();

}

}