Java HttpsURLConnection example

Here’s a simple Java HTTPS client to demonstrate the use of HttpsURLConnection class to send a HTTP GET request yo get the https URL content and certificate detail.

P.S You may interest at this example – automate login a website with HttpsURLConnection.

HttpsClient.java
package com.mkyong.client;
 
import java.net.MalformedURLException;
import java.net.URL;
import java.security.cert.Certificate;
import java.io.*;
 
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLPeerUnverifiedException;
 
public class HttpsClient{
 
   public static void main(String[] args)
   {
        new HttpsClient().testIt();
   }
 
   private void testIt(){
 
      String https_url = "https://www.google.com/";
      URL url;
      try {
 
	     url = new URL(https_url);
	     HttpsURLConnection con = (HttpsURLConnection)url.openConnection();
 
	     //dumpl all cert info
	     print_https_cert(con);
 
	     //dump all the content
	     print_content(con);
 
      } catch (MalformedURLException e) {
	     e.printStackTrace();
      } catch (IOException e) {
	     e.printStackTrace();
      }
 
   }
 
   private void print_https_cert(HttpsURLConnection con){
 
    if(con!=null){
 
      try {
 
	System.out.println("Response Code : " + con.getResponseCode());
	System.out.println("Cipher Suite : " + con.getCipherSuite());
	System.out.println("\n");
 
	Certificate[] certs = con.getServerCertificates();
	for(Certificate cert : certs){
	   System.out.println("Cert Type : " + cert.getType());
	   System.out.println("Cert Hash Code : " + cert.hashCode());
	   System.out.println("Cert Public Key Algorithm : " 
                                    + cert.getPublicKey().getAlgorithm());
	   System.out.println("Cert Public Key Format : " 
                                    + cert.getPublicKey().getFormat());
	   System.out.println("\n");
	}
 
	} catch (SSLPeerUnverifiedException e) {
		e.printStackTrace();
	} catch (IOException e){
		e.printStackTrace();
	}
 
     }
 
   }
 
   private void print_content(HttpsURLConnection con){
	if(con!=null){
 
	try {
 
	   System.out.println("****** Content of the URL ********");			
	   BufferedReader br = 
		new BufferedReader(
			new InputStreamReader(con.getInputStream()));
 
	   String input;
 
	   while ((input = br.readLine()) != null){
	      System.out.println(input);
	   }
	   br.close();
 
	} catch (IOException e) {
	   e.printStackTrace();
	}
 
       }
 
   }
 
}

Output…

Response Code : 200
Cipher Suite : SSL_RSA_WITH_RC4_128_SHA
 
Cert Type : X.509
Cert Hash Code : 7810131
Cert Public Key Algorithm : RSA
Cert Public Key Format : X.509
 
Cert Type : X.509
Cert Hash Code : 6042770
Cert Public Key Algorithm : RSA
Cert Public Key Format : X.509
 
****** Content of the URL ********
<!doctype html><html><head><meta http-equiv="content-type" ......
Note
For more detail usage, please refer to this example – Send HTTP Request GET/POST In Java

References

  1. Send HTTP Request GET/POST In Java
  2. Apache HttpClient examples
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About the Author

mkyong
Founder of Mkyong.com and HostingCompass.com, love Java and open source stuff. Follow him on Twitter, or befriend him on Facebook or Google Plus. If you like my tutorials, consider make a donation to these charities.

Comments

  • abc

    i have to pass the xml a https url and get the response. but i am getting the following error at
    con.getResponseCode()

    Could any one please help me

    java.net.SocketException: Connection reset
    at java.net.SocketInputStream.read(Unknown Source)
    at com.sun.net.ssl.internal.ssl.InputRecord.readFully(Unknown Source)
    at com.sun.net.ssl.internal.ssl.InputRecord.read(Unknown Source)
    at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readRecord(Unknown Source)
    at com.sun.net.ssl.internal.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
    at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(Unknown Source)
    at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(Unknown Source)
    at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
    at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
    at java.net.HttpURLConnection.getResponseCode(Unknown Source)
    at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
    at com.xml.TestURL.print_https_cert
    at com.xml.TestURL.testIt
    at com.xml.TestURL.main
    java.net.SocketException: Connection reset
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
    at java.lang.reflect.Constructor.newInstance(Unknown Source)
    at sun.net.www.protocol.http.HttpURLConnection$6.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at sun.net.www.protocol.http.HttpURLConnection.getChainedException(Unknown Source)

    at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
    at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(Unknown Source)
    at com.xml.TestURL.print_content(TestURL.java:89)
    at com.xml.TestURL.testIt
    at com.xml.TestURL.main
    Caused by: java.net.SocketException: Connection reset
    at java.net.SocketInputStream.read(Unknown Source)
    at com.sun.net.ssl.internal.ssl.InputRecord.readFully(Unknown Source)
    at com.sun.net.ssl.internal.ssl.InputRecord.read(Unknown Source)
    at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readRecord(Unknown Source)
    at com.sun.net.ssl.internal.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
    at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(Unknown Source)
    at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(Unknown Source)
    at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
    at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
    at java.net.HttpURLConnection.getResponseCode(Unknown Source)
    at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)

  • sham

    If you have an internal proxy server,
    You need to include the following vm arguments
    -Dhttps.proxyHost=proxy.xyz.com
    -Dhttps.proxyPort=7070

    • abc

      I am getting below error could you pleease help me for the same, in
      OutputStream out = connection.getOutputStream();

      Exception in thread “main” java.net.SocketException: Connection reset
      at java.net.SocketInputStream.read(Unknown Source)
      at com.sun.net.ssl.internal.ssl.InputRecord.readFully(Unknown Source)
      at com.sun.net.ssl.internal.ssl.InputRecord.read(Unknown Source)
      at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readRecord(Unknown Source)
      at com.sun.net.ssl.internal.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
      at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(Unknown Source)
      at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(Unknown Source)
      at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
      at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
      at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(Unknown Source)
      at sun.net.www.protocol.https.HttpsURLConnectionImpl.getOutputStream(Unknown Source)

  • BARKAT

    Hi

    i need someone help me how do i create a simple HttpsSerer for java

  • DNavarro

    I need to download and print this html page from my localhost, but the error

    javax.net.ssl.SSLHandshakeException: Received fatal alert: certificate_unknown

    does not allow me to do that. Could you please help me to set up what it is needed to do that?

    Thank you in advance.

    Regards.

  • Asiri Indrajith

    This is working for me. How can I implement this for client authentication(2-way SSL)?

  • Anunay

    getting the below error – while trying to run the code in JDK 1.6 version.
    any help will be appriciated..
    java.net.ConnectException: Connection refused: connect
    at java.net.PlainSocketImpl.socketConnect(Native Method)
    at java.net.PlainSocketImpl.doConnect(Unknown Source)
    at java.net.PlainSocketImpl.connectToAddress(Unknown Source)
    at java.net.PlainSocketImpl.connect(Unknown Source)
    at java.net.SocksSocketImpl.connect(Unknown Source)
    at java.net.Socket.connect(Unknown Source)
    at com.sun.net.ssl.internal.ssl.SSLSocketImpl.connect(Unknown Source)
    at com.sun.net.ssl.internal.ssl.BaseSSLSocketImpl.connect(Unknown Source)
    at sun.net.NetworkClient.doConnect(Unknown Source)
    at sun.net.www.http.HttpClient.openServer(Unknown Source)
    at sun.net.www.http.HttpClient.openServer(Unknown Source)
    at sun.net.www.protocol.https.HttpsClient.(Unknown Source)
    at sun.net.www.protocol.https.HttpsClient.New(Unknown Source)
    at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.getNewHttpClient(Unknown Source)
    at sun.net.www.protocol.http.HttpURLConnection.plainConnect(Unknown Source)
    at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
    at java.net.HttpURLConnection.getResponseCode(Unknown Source)
    at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
    at HttpsClient.print_https_cert(HttpsClient.java:45)
    at HttpsClient.testIt(HttpsClient.java:26)
    at HttpsClient.main(HttpsClient.java:13)
    ****** Content of the URL ********
    java.net.ConnectException: Connection refused: connect
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
    at java.lang.reflect.Constructor.newInstance(Unknown Source)
    at sun.net.www.protocol.http.HttpURLConnection$6.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at sun.net.www.protocol.http.HttpURLConnection.getChainedException(Unknown Source)
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
    at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(Unknown Source)
    at HttpsClient.print_content(HttpsClient.java:76)
    at HttpsClient.testIt(HttpsClient.java:29)
    at HttpsClient.main(HttpsClient.java:13)
    Caused by: java.net.ConnectException: Connection refused: connect
    at java.net.PlainSocketImpl.socketConnect(Native Method)
    at java.net.PlainSocketImpl.doConnect(Unknown Source)
    at java.net.PlainSocketImpl.connectToAddress(Unknown Source)
    at java.net.PlainSocketImpl.connect(Unknown Source)
    at java.net.SocksSocketImpl.connect(Unknown Source)
    at java.net.Socket.connect(Unknown Source)
    at com.sun.net.ssl.internal.ssl.SSLSocketImpl.connect(Unknown Source)
    at com.sun.net.ssl.internal.ssl.BaseSSLSocketImpl.connect(Unknown Source)
    at sun.net.NetworkClient.doConnect(Unknown Source)
    at sun.net.www.http.HttpClient.openServer(Unknown Source)
    at sun.net.www.http.HttpClient.openServer(Unknown Source)
    at sun.net.www.protocol.https.HttpsClient.(Unknown Source)
    at sun.net.www.protocol.https.HttpsClient.New(Unknown Source)
    at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.getNewHttpClient(Unknown Source)
    at sun.net.www.protocol.http.HttpURLConnection.plainConnect(Unknown Source)
    at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
    at java.net.HttpURLConnection.getResponseCode(Unknown Source)
    at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
    at HttpsClient.print_https_cert(HttpsClient.java:45)
    at HttpsClient.testIt(HttpsClient.java:26)
    … 1 more

  • Sam

    Goooooooood, Thanks a lot…mkyong

  • jjacquet

    Works perfectly. Thank you sir.

  • Lieu R G

    hi

    thanks for the code above, this works fine for google ,yahoo , facebook etc , why its not working for our websie ,having installed ssl trial certificate. i am getting following error

    javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
    please help me

  • narendar chary

    Hi,
    Here in the sample code how are we able to get the Certificates from the server eventhough we did not validated the HostName,CA which is mandatory while SSL handshake.

    Thanks,
    Narendar

  • Chirag

    Hi i have 2 question.
    1) i need expire date for the certificate.(As i already try this code ((X509Certificate) certs).checkValidity(d); but i need proper date of expire.

    Ques 2) Here in Certificate[] certs = con.getServerCertificates();, i am getting array of certificates i.e multiple certificate, so which one i have to check , my requirement is to get same expire date which we show in browser on firing the URL.

    Pls help me out.
    Thanks in Adv.
    Chirag Shah.

    • Cor Broekhuis

      1. cert.toString() will give you all info including expire date

      2. First is the certificate you need. Second is intermediate certificate

  • Charith

    2012-07-31 10:32:27,901 [http-8080-15] ERROR pfaddonscat – MYDOCUMENTS: :Unrecognized SSL message, plaintext connection?
    RequestMap:{ui=xbrowser, application=mydocuments, FATAL_ERROR_THROWABLE=java.lang.reflect.InvocationTargetException, FILEDESCRIPTION=testing, FILETITLE=test, SID=4C91AA8EB36CC2D02E0395BF234DF2D4, IID=-1, pf.mwpef.engine.uiPackage=xbrowser, pf.mwpef.engine.uiStyle=html-v3.xsl, CATEGORY=1, applicationtype=MYDOCUMENTSE, style=html, keytype=ENTER, _USER_DIVISION_NAME=, FATAL_ERROR=COMMON_MWPEF00002}
    Stacktrace:
    javax.net.ssl.SSLException: Unrecognized SSL message, plaintext connection?
    at com.sun.net.ssl.internal.ssl.InputRecord.handleUnknownRecord(InputRecord.java:523)
    at com.sun.net.ssl.internal.ssl.InputRecord.read(InputRecord.java:355)
    at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:789)
    at com.sun.net.ssl.internal.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1112)
    at com.sun.net.ssl.internal.ssl.SSLSocketImpl.writeRecord(SSLSocketImpl.java:623)
    at com.sun.net.ssl.internal.ssl.AppOutputStream.write(AppOutputStream.java:59)
    at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:65)
    at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:123)
    at org.apache.commons.httpclient.methods.EntityEnclosingMethod.writeRequestBody(EntityEnclosingMethod.java:506)
    at org.apache.commons.httpclient.HttpMethodBase.writeRequest(HttpMethodBase.java:2114)
    at org.apache.commons.httpclient.HttpMethodBase.execute(HttpMethodBase.java:1096)
    at org.apache.commons.httpclient.HttpMethodDirector.executeWithRetry(HttpMethodDirector.java:398)
    at org.apache.commons.httpclient.HttpMethodDirector.executeMethod(HttpMethodDirector.java:171)
    at org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:397)
    at org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:323)
    at de.pepperlfuchs.modules.mydocuments.MYDOCUMENTSEWrapper.saveCurrentDetails(MYDOCUMENTSEWrapper.java:97)
    at de.pepperlfuchs.mwpef.modules.aiobjects.AbstractModuleEWrapper.executeENTER(AbstractModuleEWrapper.java:39)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at de.pepperlfuchs.mwpef.modules.RequestDispatcher.execute(RequestDispatcher.java:83)
    at de.pepperlfuchs.mwpef.engine.action.AbstractAction.dispatchRequestToModule(AbstractAction.java:209)
    at de.pepperlfuchs.mwpef.engine.action.GenericAction.handleModuleDispatch(GenericAction.java:163)
    at de.pepperlfuchs.mwpef.engine.action.GenericAction.handleActionExecute(GenericAction.java:70)
    at de.pepperlfuchs.mwpef.engine.action.AbstractAction.execute(AbstractAction.java:49)
    at org.apache.struts.chain.commands.servlet.ExecuteAction.execute(ExecuteAction.java:58)
    at org.apache.struts.chain.commands.AbstractExecuteAction.execute(AbstractExecuteAction.java:67)
    at org.apache.struts.chain.commands.ActionCommandBase.execute(ActionCommandBase.java:51)
    at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:191)
    at org.apache.commons.chain.generic.LookupCommand.execute(LookupCommand.java:305)
    at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:191)
    at org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:283)
    at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
    at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:462)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at de.pepperlfuchs.mwpef.engine.action.CharsetFilter.doFilter(CharsetFilter.java:31)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
    at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:859)
    at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:579)
    at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1555)
    at java.lang.Thread.run(Thread.java:619)

    Can anyone help out to get out of this. i’m using Httpclient and post method to connect to Https.

  • madhu

    Thanks a lot…. mkyong
    till now i dont know to download secure http pages into my local sys.

  • Nanna Rahi

    Has this code worked for anybody. Here it is throwing java.net.UnknownHostException

  • Kriss

    Hi

    I`m exploring HttpsUrlConnection second week and I`ve no idea how to force it to reuse open connection.

    Can you help me?

    I need SNI, client certs and custom trustStore (I`m using my own CA). Regardless if I use my own CA or global one (GoDaddy), on server side via tshark I can see that connection is being close my Android app (TCP FIN packet). Even is second transaction is call right after the first one.

    Regards

  • Giacomo

    Perfect!

  • Sonu

    Above code does not work.. it gives UnknownHostException.
    I want to connect to https URL with username and password. when i try to open url in browser it prompts me for Username and password and after typing credentials it displayes xml which i need to save into xml file.. this is the requirement which i need to do in java. can you tell me how to do it?

  • http://www.violincad.som gene bidwell

    If this is a server proxy problem how do I get around it.
    C:\MSD\source4>java HttpsClient
    java.net.SocketException: Network is unreachable: connect
    at java.net.PlainSocketImpl.socketConnect(Native Method)

    at sun.net.www.http.HttpClient.openServer(HttpClient.java:394)
    at sun.net.www.http.HttpClient.openServer(HttpClient.java:529)
    at sun.net.www.protocol.https.HttpsClient.(HttpsClient.java:272)
    at sun.net.www.protocol.https.HttpsClient.New(HttpsClient.java:329)

    at HttpsClient.print_https_cert(HttpsClient.java:65)
    at HttpsClient.testIt(HttpsClient.java:46)
    at HttpsClient.main(HttpsClient.java:33)
    ****** Content of the URL ********

  • Darshana

    Hi,

    I’m having an issue with HttpsUrlConnection. I’m writing my request to the connection outputstream but I don’t get anything in inputstream. It’s empty.

    So I tried with your code by setting my URL but still i have the same issue.

    Any help will be appreciated.

    Thanks,
    Darshana

    • http://www.mkyong.com mkyong

      send me your code via email

      • naren

        Caused by: javax.net.ssl.SSLException: Inbound closed before receiving peer’s close_notify: possible truncation attack?

  • atul darne

    how if i need to download a file that is in the server directory

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