http://dn.codegear.com/article/29783 2008-10-07T02:09:31-07:00 Craven Weasel http://threads.codegear.com/threads/threads.exe/userall?commentid=40589 http://threads.codegear.com/threads/threads.exe/view?commentid=40589 2007-10-22T03:55:10-07:00 2007-10-22T03:55:10-07:00

Using URLConnection with a Proxy Server by Daniel Horn

Much simpler to use this before your connection System.setProperty("http.proxyHost","PROXY_SERVER_IP_OR_NAME");System.setProperty("http.proxyPort","PORT NUMBER PROXYservice");http://forum.java.sun.com/thread.jspa?threadID=729144&messageID=4197363 ajay a http://threads.codegear.com/threads/threads.exe/userall?commentid=39521 http://threads.codegear.com/threads/threads.exe/view?commentid=39521 2006-10-12T09:04:23-07:00 2006-10-12T09:04:23-07:00

Using URLConnection with a Proxy Server by Daniel Horn

Hello Daniel,I was able to implement this on my application but I am unable to do for the HTTPS protocol (URLConnection with ProxyServer for HttpsConneciton) I am getting Connection refused error I have implemented like this url = new URL(url.getProtocol(), // HTTPS proxyHost, //MY PROXY SERVER HOST proxyPort, //PROXY PORT ( I tried with 443 also) url //Complete Https URL );Please advise me if you would know how to achieve dynamic Https connection, I tried with HttpsProxyHost but it's not feasible on Multithreaded Environment on single JVM Thanks Ajay Craven Weasel http://threads.codegear.com/threads/threads.exe/userall?commentid=38935 http://threads.codegear.com/threads/threads.exe/view?commentid=38935 2006-02-21T07:56:10-08:00 2006-02-21T07:56:10-08:00

Using URLConnection with a Proxy Server by Daniel Horn

The sample doesnt work and request doesn't go beyond proxy. Joseph Wang http://threads.codegear.com/threads/threads.exe/userall?commentid=34935 http://threads.codegear.com/threads/threads.exe/view?commentid=34935 2003-07-10T11:34:51-07:00 2003-07-10T11:34:51-07:00

Using URLConnection with a Proxy Server by Daniel Horn

I read this article and coied the code to my program.But it can't work when I run it .I traced it ,fund it can't to get connection at :HttpURLConnection h = (HttpURLConnection) c;h.connect();When I run the original code in JBuilder, it works.I don't have proxy, so I put null in the "strProxy" Richard Durley http://threads.codegear.com/threads/threads.exe/userall?commentid=34812 http://threads.codegear.com/threads/threads.exe/view?commentid=34812 2003-06-19T02:09:10-07:00 2003-06-19T02:09:10-07:00

Using a HTTPS URLConnection with a Proxy Server

After much reading and a day of messing around I finally stumbled on a configuration that workswhen wanting to connect to a https site via a proxy server I hope it is of use.import com.sun.net.ssl.*;import Base64Converter;import java.net.*;import java.io.*;import java.util.*; /** * The following code demonstrates how you can connect using HTTPS through a proxy server * @author richard.durley@eds.com */ public static void testHttpsTunnelledThroughProxy() { HttpsURLConnection con = null; BufferedReader reader = null; InputStream in = null; String inLine = null; try { //does not seem to matter if you set this or not ! System.getProperties().put( "proxySet", "true" ); //Define the https proxy server and port if your using https connections System.getProperties().put( "https.proxyHost", "xxx.xxx.xxx.xxx" ); System.getProperties().put( "https.proxyPort", "443" ); //The properties to define the proxy user and password dont seem to work //you will need to add the Proxy-Authorization header manually to the request //see futher down System.getProperties().put("https.proxyUser", "userid"); System.getProperties().put("https.proxyPassword", "password");*/ //Add the route to your cacerts filestore (or a filestore of your choice) //you'll find ca certs at java_home$/jre/lib/security //Seems that if you dont add this java will not always find the certificate required for to trust //the SSL connection. // //Note if you still get a CertificateException "could not find trusted //certificate" then you will need to import the public certificate of the website you are connecting //to into the keystore using keytool -import -keystore cacerts -file thecert.cer -alias thecertname //you'll be promoted to enter a password it is 'changeit' by default. System.setProperty("javax.net.ssl.trustStore", "d:/j2sdk1.4.1_02/jre/lib/security/cacerts"); //Defines the internal ssl protocol implementation System.setProperty("java.protocol.handler.pkgs","com.sun.net.ssl.internal.www.protocol"); //Adds the ssl provider java.security.Security.addProvider(new com.sun.net.ssl.internal.ssl.Provider()); //Define the url you want to connect to, note the name of the host in the certificate needs to match the host in the URL URL url = new URL("https://www.mysecurehost.com/mysecurepage.html"); System.out.println(url.toExternalForm()); //Open the https URL connection con = (HttpsURLConnection) url.openConnection(); //Follow redirects if necessary con.setFollowRedirects(true); //Set the Proxy-Authorization header for basic proxy authorization //If you dont do this you will get //'Unable to tunnel through proxy. Proxy returns "HTTP/1.0 407 Authenticate required' IOException //You also will need a base64 encoder to encode the userid and password string con.setRequestProperty( "Proxy-Authorization", "Basic " + Base64Converter.encode("proxyuserid:proxypassword")); //get the input stream in = con.getInputStream(); reader = new BufferedReader(new InputStreamReader(in)); inLine = reader.readLine(); //read all lines while (inLine != null) { System.out.println(inLine); inLine = reader.readLine(); } //read the cookie string if you want to store it (especially useful to capture the //session id if returned from the server you can then add this to future requests String cookie = con.getHeaderField("Set-Cookie"); int index = cookie.indexOf(";"); if(index >= 0) cookie = cookie.substring(0, index); Balance.cookie=cookie; //close reader.close(); in.close(); con.disconnect(); } catch (Exception e) { e.printStackTrace(System.out); } } Craven Weasel http://threads.codegear.com/threads/threads.exe/userall?commentid=34771 http://threads.codegear.com/threads/threads.exe/view?commentid=34771 2003-06-10T14:51:45-07:00 2003-06-10T14:51:45-07:00

Using URLConnection with a Proxy Server by Daniel Horn

Hi,I've followed exctly the way you described in the article.I specified the IP and port # of proxy. For some reason,I've been getting an exception at run time. It's something likethisjava.net.ConnectException: Connection timed out: connectThread 0 connect to serverMy first guess is that I put an invalid proxy's IP address.I already tried to browse through the proxy by using Internet Explorer and it works fine. Any possible solution. Any help is very appreciatedThank you very much Rainer Warth http://threads.codegear.com/threads/threads.exe/userall?commentid=34534 http://threads.codegear.com/threads/threads.exe/view?commentid=34534 2003-04-28T06:28:29-07:00 2003-04-28T06:28:29-07:00

Using URLConnection with a Proxy Server by Daniel Horn

Dear Daniel, I enjoyed reading your article. I helped me very much during my current project. I agree with you that some documentation or example was missing until now.Thanks, Rainer