CODEWITHSUNDEEP
javahttps
KB22
KB22

Reputation: 6979

Using java class HttpsURLConnection

I have a small piece of code which basically impements a HTTP-Client, i.e. it POSTS request and works with re RESPONSE. As long as HTTP is concenerned everthing work well. For some reason I now have to support HTTPS too. So here is briefly what I do in order to get a connection opened:

 URL url = new URL(serverAddress);
 HttpsURLConnection httpsConn = (HttpsURLConnection) url.openConnection();

This fails, stating:

sun.net.www.protocol.https.HttpsURLConnectionImpl cannot be cast to com.sun.net.ssl.HttpsURLConnection

I guess this is kinda trivial, but I just don't get what I'm doing wrong in this one... Googled it, and the code just looks right - not?

any ideas are appreciated!

Upvotes: 33

Views: 89781

Answers (9)

BalusC
BalusC

Reputation: 1109875

Just keep it java.net.URLConnection or cast it to java.net.HttpURLConnection instead. Both offers methods to do the desired task as good.

A side remark unrelated to the technical problem: you should never explicitly import/use Sun Java SE implementation specific classes in your code. Those are undocumented classes and are subject to changes which may cause your code break when you upgrade the JVM. On the other hand, your code may also break when you run it at a different brand JVM.

Update: since you seem to accidentally have imported it, go to Window > Preferences > Java > Appearance > Type Filters and Add com.sun.* and sun.* to the list. This way you won't ever import them accidentally:

enter image description here

Upvotes: 29

AJC
AJC

Reputation: 1081

In my case, the protocol and port were not correct while invoking the httpsUrlConnection.

Port and protocol were defined as static class variables. And the step prior to the failed step, was invoking an httpUrlConnection. That method changed the port/protocol to 80/http, but didn't set it back to /https at the end. So eventhough httpsUrlConnection was invoked, it was still using http/80. Once I reset those at the end of the httpUrlConnection method, the error disappeared.

Upvotes: 0

Geanluca
Geanluca

Reputation: 41

Change:

import javax.net.ssl.HttpsURLConnection;

and

URL url = new URL(serverAddress);
HttpsURLConnection httpsConn = (HttpsURLConnection) url.openConnection();

Change To:

import java.net.HttpURLConnection;

and

URL url = new URL(serverAddress);
HttpURLConnection httpConn = (HttpURLConnection) url.openConnection();

Upvotes: 4

user2505915
user2505915

Reputation: 81

The above problem is only caused by two issues

  1. Using wrong import
  2. Using http in the string you create url from use instead https

Upvotes: 13

Salman Zafar
Salman Zafar

Reputation: 191

Your url's protocol should also be https and not http. Check your url.

Upvotes: 19

Dayanand Fagare
Dayanand Fagare

Reputation: 84

Check value of your "serverAddress" variable. It should https and not http

Upvotes: 5

jsaevsah
jsaevsah

Reputation: 79

Instead of creating a URL object using standard constructor like

URL wsURL = new URL(url);

Use

java.net.URL wsURL = new URL(null, url,new sun.net.www.protocol.https.Handler());

which would solve this problem

Upvotes: 7

DaveJohnston
DaveJohnston

Reputation: 10161

Check your imports, you should be using

java.net.HttpURLConnection

or

javax.net.ssl.HttpsURLConnection

Upvotes: 6

Mike Baranczak
Mike Baranczak

Reputation: 8384

Hard to tell without seeing the whole file, but it looks like you're importing com.sun.net.ssl.HttpsURLConnection when you really want javax.net.ssl.HttpsURLConnection.

Upvotes: 4

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