Socket.io-client-java: java.net.MalformedURLException: Unknown protocol: ws

[Zo2m4bie]

Hi. i try to connect to socket server which start with "ws://..." and when I set this url to

 IO.socket(pathSocket, options);

I receive error

 java.lang.RuntimeException: java.net.MalformedURLException: Unknown protocol: ws
 W/System.err﹕ at io.socket.client.Url.parse(Url.java:52)
 W/System.err﹕ at io.socket.client.IO.socket(IO.java:60)
 W/System.err﹕ at io.socket.client.IO.socket(IO.java:41)

[nkzawa]

Ah, I didn't know URL doesn't accept ws. It's a bug, please use http:// url for now.

[Zo2m4bie]

Also the same problem with wss://

[Zo2m4bie]

Can I wait this fix soon?

[Zo2m4bie]

I wanted t ofix it by myself but there're not all class in project

[nkzawa]

Just use http:// or https://. They are actually the same with ws:// and wss:// .

[SteveMobile]

we use the websocket can connect wss:// , but use this library ,can't connect the "https://" , no any reponse,can you help ?

[PuKoren]

+1, this is causing heavy issues on socket servers: losing a lot of CPU on back and forth requests upgrading the connexion. This is a major issue when you have a lot of conn/second

[kruyvanna]

+1

[sindrenm]

This is caused by java.net.URL not knowing how to open a connection towards a ws:// stream. It could be solved by using java.net.URI instead, which is what the Java-WebSocket library uses.

[sr71k]

did it fix?

[Agraphie]

are there any news on this?

[b95505017]

Maybe we could use this to resolve the issue
https://medium.com/square-corner-blog/okhttps-new-url-class-515460eea661#.v55accs1c

[jvilya]

We are using Socket.io 1.4.5 and this library on Android client. For connection string we are using http(s), but it switches to ws automatically with these setup:

    IO.Options opts = new IO.Options();
    opts.transports = new String[]{ WebSocket.NAME};
    return IO.socket("https://socket.io.server", opts);

[isanwenyu]

@jvilya hi,I have tried your code above,but it doesn't work.
Is the code used in android client?

[jvilya]

@isanwenyu yes. Try to debug it with any proxy-debugging tool and see what happens
In my case I saw connection to https and then switch to ws

[aaronstanley]

2 Years later and still no fix? is this product no longer being supported?

[maheshputtegowda]

hello guys this ws: issue is fixed?

[maheshputtegowda]

any solution to implement

[GirishBhutiya]

Still not working and it is not connect with http:// .

[PhonegapProjects]

not working at all!!!!!!!!!

[jakubzieba]

after a year ... it still does not work

[songkadi]

no hope for this topic

[tiholic]

https://github.com/infitio/flutter_socket_io/issues/34
https://github.com/infitio/flutter_socket_io/issues/32

[Arnique]

The socket server I'm connecting to only works with wss...any solutions for 2019?

[xiaoshengmm]

java.lang.RuntimeException: java.net.MalformedURLException: Unknown protocol: ws who know？how to fix it

[rogerthat94]

Maybe we could use this to resolve the issue
https://medium.com/square-corner-blog/okhttps-new-url-class-515460eea661#.v55accs1c

This doesn't fix the ws: issue. OkHttp just replaces ws: with http: before parsing the URL.

[felipecsl]

from the HttpUrl javadocs:

 * Sometimes referred to as *protocol*, A URL's scheme describes what mechanism should be used to
 * retrieve the resource. Although URLs have many schemes (`mailto`, `file`, `ftp`), this class only
 * supports `http` and `https`. Use [java.net.URI][URI] for URLs with arbitrary schemes.

[H4kt]

Idk if someone is still looking for an easy hot-fix, but I'll just leave it here.

    public static void addURLProtocols() {

        try {

            Field field = URL.class.getDeclaredField("handlers");
            field.setAccessible(true);

            URLStreamHandler handler = new URLStreamHandler() {
                @Override
                protected URLConnection openConnection(URL url) throws IOException {
                    return new URLConnection(url) {
                        @Override
                        public void connect() throws IOException {}
                    };
                }
            };

            Hashtable<String, URLStreamHandler> handlers = (Hashtable<String, URLStreamHandler>) field.get(null);
            handlers.put("wss", handler);
            handlers.put("ws", handler);

        } catch(Exception ex) {
            ex.printStackTrace();
        }

    }

[vasilevungureanu]

Hi,

I was able to solve this problem in this way:

(Kotlin)

val options = IO.Options()
            options.forceNew = true
            options.path = "/wss"

 socket = IO.socket("https://", options)

[Mohamed-Shalabi]

Nothing here is working for me..
But I didn't check medium blog
I have used org.java_websocket and it worked well, but I need to know what is the problem with socket io!

[H4kt]

@Mohamed-Shalabi
Have you tried the code below?

Idk if someone is still looking for an easy hot-fix, but I'll just leave it here.

    public static void addURLProtocols() {

        try {

            Field field = URL.class.getDeclaredField("handlers");
            field.setAccessible(true);

            URLStreamHandler handler = new URLStreamHandler() {
                @Override
                protected URLConnection openConnection(URL url) throws IOException {
                    return new URLConnection(url) {
                        @Override
                        public void connect() throws IOException {}
                    };
                }
            };

            Hashtable<String, URLStreamHandler> handlers = (Hashtable<String, URLStreamHandler>) field.get(null);
            handlers.put("wss", handler);
            handlers.put("ws", handler);

        } catch(Exception ex) {
            ex.printStackTrace();
        }

    }