How to use HttpsURLConnection through proxy by setProperty?

59,835

Solution 1

Your URL connection is https whereas you are only setting the http proxy.

Try setting the https proxy.

//System.setProperty("https.proxySet", "true"); 
 System.setProperty("https.proxyHost",10.100.21.11);
 System.setProperty("https.proxyPort","443");

EDIT @EJP is correct. There is no https.proxySet .. I copied your original question and included in the answer.

Solution 2

You will need to create a Proxy object for it. Create one as below:

Proxy proxy = new Proxy(Proxy.Type.HTTP, new InetSocketAddress(proxyServer, Integer.parseInt(proxyPort)));

Now use this proxy to create the HttpURLConnection object.

HttpURLConnection connection = (HttpURLConnection) new URL(url).openConnection(proxy);

If you have to set the credentials for the proxy, set the Proxy-Authorization request property:

String uname_pwd = proxyUsername + ":" + proxyPassword
String authString = "Basic " + new sun.misc.BASE64Encoder().encode(uname_pwd.getBytes())
connection.setRequestProperty("Proxy-Authorization", authString);

And finally, you connect:

connection.connect();

Solution 3

thank you @divinedragon!

Same code on kotlin:

 fun testProxy(login: String, pass: String, proxyData: ProxyData): String {
    val url = URL("http://api.ipify.org")
    val proxy = Proxy(Proxy.Type.HTTP, InetSocketAddress(proxyData.ip, proxyData.port))
    val connection = url.openConnection(proxy) as HttpURLConnection

    val loginPass = "$login:$pass"
    val encodedLoginPass = Base64.getEncoder().encodeToString(loginPass.toByteArray())
    val authString = "Basic $encodedLoginPass"
    connection.setRequestProperty("Proxy-Authorization", authString);
    with(connection) {
        requestMethod = "GET"  // optional default is GET
        connectTimeout = 2000
        readTimeout = 2000
        return inputStream.bufferedReader().readText()
    }
}
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59,835
CJeremy
Author by

CJeremy

Updated on July 09, 2022

Comments

  • CJeremy
    CJeremy over 1 year

    Network environment:

    Https Client<=============>Proxy Server<==============>Https Server
                                                      192.168.17.11<-----extranet------>192.168.17.22
    10.100.21.10<----intranet----->10.100.21.11

    ps: Http Client without default gateway, but it can ping to 10.100.21.11

    Description:

    OS: Ubuntu 12.04 on 3 hosts
    Https Client: Implement with java(openjdk-6).Have one network-interface.
    Proxy Server: Apache2.2.Have two network-interfaces.
    Https Server: Tomcat6.Have one network-interface.

    I use two method to implement httpsurlconnection through proxy:
    (For facilitate I do not write down about ssl handle function for checking serverTrusted and hostnameVerifier issue.If need I will update.)

    1.Proxy class

    InetSocketAddress proxyInet = new InetSocketAddress("10.100.21.11",80);
    Proxy proxy = new Proxy(Proxy.Type.HTTP, proxyInet);
    URL httpsUrl = new URL("https://192.168.17.22:8443/test");
    HttpsURLConnection httpsCon = (HttpsURLConnection) httpsUrl.openConnection(proxy);
    
    httpsCon.setDoOutput(true);
    httpsCon.setDoInput(true);
    httpsCon.setRequestMethod("POST");
    OutputStream out = httpsCon.getOutputStream();
    OutputStreamWriter owriter = new OutputStreamWriter(out);
    
    owriter.write("<request>test</request>");
    owriter.flush();
    owriter.close();
    ...
    

    This method workable and I observed packets flow also met my expectation.
    HttpClient ---> ProxyServer ---> HttpServer

    But when I use set Property method:

    2.setProperty

    System.setProperty("http.proxySet", "true");
    System.setProperty("http.proxyHost",10.100.21.11);
    System.setProperty("http.proxyPort","80");
    
    URL httpsUrl = new URL("https://192.168.17.22:8443/test");
    HttpsURLConnection httpsCon = (HttpsURLConnection)httpsUrl.openConnection();
    
    httpsCon.setDoOutput(true);
    httpsCon.setDoInput(true);
    httpsCon.setRequestMethod("POST");
    OutputStream out = httpsCon.getOutputStream();
    OutputStreamWriter owriter = new OutputStreamWriter(out);
    
    owriter.write("<request>test</request>");
    owriter.flush();
    owriter.close();
    ...
    

    I got a NoRouteToHostException: Network is unreachable.
    It make me confused.I did not see any packets between HttpClient and ProxyServer.
    But HttpClient can ping to ProxyServer(10.100.12.10 ping 10.100.21.11)

    So I remove proxy setting(as without using proxy):
    Also got NoRouteToHostException: Network is unreachable.
    I thought this is reasonable.Because there is no route to extranet.

    I guess it seems like to setProperty method that the inner function of httpsUrlConnection will to check this url can be reachable or not.

    But it is weird. 1st method can be success.

    Have any idea? Or what are different between 1st and 2nd method?

    +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

    Update

    System.setProperty("https.proxyHost",10.100.21.11);
    System.setProperty("https.proxyPort","80"); 
    

    It can work and packets flow are correct what I expect for.
    But set https.proxyPort=443 is not workable for me

    System.setProperty("https.proxyPort","443");
    

    It will thorow a exception as bellow:

    java.net.SocketException: Unexpected end of file from server 
    at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:770)
    ....
    

    So I thought Apache Proxy have also to be modified to the right configuration.

  • user207421
    user207421 over 10 years
    There is no such property as https.proxySet.
  • CJeremy
    CJeremy over 10 years
    I think this is the right answer while sending a request "https" url. the key of setProperty is https.proxyHost/proxyPort instead of http.proxyHost/porxyPort.
  • CJeremy
    CJeremy over 10 years
    Thank you for your reply. First, I use 1st method is creating a proxy object and it is workable for me. Second, the url what I need is "https" so I think to use HttpsURLConnection is correct.