set proxy in java

Question

I create a service that post something through the internet and everything's fine. But when I deploy it to our server I get connection status:403, forbidden. I think it is because our server won't allow direct access to the internet without login first. We have to login first in the browser with our username/password to access the internet.

I notice that if I have login and access the internet in the server, the service I deploy run alright. But I don't think it's practical because in that case my service won't run if someone or I don't login first.

I have tried setting the proxy in the java code but to no avail. Could someone help me with this problem? Here is I post my service snippet.

System.getProperties().put("http.proxySet", "true");
System.getProperties().put("http.proxyHost", myHost);
System.getProperties().put("http.proxyPort", "8080");
System.getProperties().put("http.proxyUser", myUser);
System.getProperties().put("http.proxyPassword", myPassword);
System.getProperties().put("http.nonProxyHosts", "localhost|127.0.0.1");

try {
            URL url = new URL(urlAddress);
            HttpURLConnection con = (HttpURLConnection) url.openConnection();          
            con.setRequestMethod("POST");
            con.setDoOutput(true);
            con.setDoInput(true);  

            ...

            if (con.getResponseCode() == HttpURLConnection.HTTP_OK) {
                System.out.println("connection OK");
                istrm = con.getInputStream();
                if (istrm == null) {
                    System.out.println("istrm == null");
                }

                ...

            } else {
                System.out.println("Response: " + con.getResponseCode() + ", " + con.getResponseMessage());
            }
}

And my process goes to else block and gets response message 403

http.proxySet is an urban myth. It has no effect. – user207421 Apr 11 '12 at 18:59 — user207421, Apr 11 '12 at 18:59

score 4 · Accepted Answer · answered Mar 16 '11 at 02:29

4

Try using System.setProperty(String, String) instead.

answered Mar 16 '11 at 02:29

Brent Worden

10,624
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1

I don't think this will help. `System.getProperties()` returns THE system properties object ... not a copy. – Stephen C Mar 16 '11 at 03:19
@Stephen Looking at the JDK source code, I agree. +1 for your -D answer. – Brent Worden Mar 16 '11 at 14:44

Jake Sankey · Answer 2 · 2011-06-28T20:59:38.133

3

This is how you set application-wide proxies..

System.setProperty("https.proxyHost", "myproxy.domain.com"); 
System.setProperty("https.proxyPort", "myport");

NOTE: use http.proxyHost and http.proxyPort if you don't require https.

edited Jun 28 '11 at 20:59

answered Jun 28 '11 at 20:54

Jake Sankey

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score 1 · Answer 3 · answered May 17 '18 at 08:51

1

If you are using a proxy on your system... (I mean on your operating system) you can use this line of code:

System.setProperty("java.net.useSystemProxies", "true");

answered May 17 '18 at 08:51

Zeinab Ghaffarnasab

794
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score 1 · Answer 4 · answered Mar 16 '11 at 03:18

I think that the problem is that you are setting the properties too late. The HTTP request router code is likely to read those properties once during its initialization. If your code sets the properties after the HTTP request router has initialized, the new property values will have no effect ... unless you can cause the request router to reinitialize.

One way to guarantee that your proxy property settings will take effect is to set them on the java command line that launches the web server; e.g. with Tomcat on Linux, you can do this by setting the relevant "-D..." options in the JAVA_OPTS environment variable.

set proxy in java

4 Answers4

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