using autobahn websockets with existing message broker(tcp server based on pub -sub model)

#1

Hello,

I would like to use Autobahn websockets for a real time monitoring application from the web perspective but with no Crossbar.io. The reason being is ; I have an existing message broker for which I plan to extend websockets support. I would like to create websocket server within the existing broker(the tcp server) using Autobahn and would want to perform a similar publish subscribe functionalities as provided in the autobahn/example. But I would not want Crossbar.io messaging server.

My system specifications are :

Windows 8

MSVC 2012

Is this possible and how can this be done?

Regards,
Suman

0 Likes

#2

Hello,
I would like to use Autobahn websockets for a real time monitoring
application from the web perspective but with no Crossbar.io. The reason
being is ; I have an existing message broker for which I plan to extend
websockets support. I would like to create websocket server within the
existing broker(the tcp server) using Autobahn and would want to perform
a similar publish subscribe functionalities as provided in the
autobahn/example. But I would not want Crossbar.io messaging server.
My system specifications are :
Windows 8
MSVC 2012
Is this possible and how can this be done?

1) Yes!
2) By writing code?

:wink:

Seriously, what kind of answer do you expect?

One way that would allow fellows to actually comment would be if:

a) describe your "existing message broker" in detail
b) describe your actual use case and _goals_ (from a solution point of view)

Cheers,
/Tobias

···

Am 26.03.2016 um 10:28 schrieb Suman Patro:

Regards,
Suman

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#3

Yes , definitely .

My existing message broker that I refer is a message oriented middleware(YAMI4) that is event driven and transfers data to clients(YAMI4 test clients). Now I would like to improvise YAMI4 to a web extent by providing websockets support to it. Therefore , I would like to create websocket server within YAMI4 using Autobahn and refer Autobahn test examples for publishing and subscribing between YAMI4 clients and webclients . For such a requirement do, I need Crossbar.io, if yes , why and if no, what should be the procedure to go about?

Even if I create websocket server within YAMI4, do I again need a webserver?

Regards,

Suman

···

On Saturday, March 26, 2016 at 2:58:35 PM UTC+5:30, Suman Patro wrote:

Hello,

I would like to use Autobahn websockets for a real time monitoring application from the web perspective but with no Crossbar.io. The reason being is ; I have an existing message broker for which I plan to extend websockets support. I would like to create websocket server within the existing broker(the tcp server) using Autobahn and would want to perform a similar publish subscribe functionalities as provided in the autobahn/example. But I would not want Crossbar.io messaging server.

My system specifications are :

Windows 8

MSVC 2012

Is this possible and how can this be done?

Regards,
Suman

0 Likes

#4

Hi Suman,

Yes , definitely .
My existing message broker that I refer is a message oriented
middleware(YAMI4) that is event driven and transfers data to
clients(YAMI4 test clients). Now I would like to improvise YAMI4 to a
web extent by providing websockets support to it. Therefore , I would
like to create websocket server within YAMI4 using Autobahn and refer

In what language is YAMI4 written? Is it open source? If so, where is the source code?

Autobahn test examples for publishing and subscribing between YAMI4
clients and webclients . For such a requirement do, I need Crossbar.io,
if yes , why and if no, what should be the procedure to go about?
Even if I create websocket server within YAMI4, do I again need a webserver?

Not necessarily. Non-browser clients won't need a Web server. For browser clients, there needs to be a Web server _somewhere_ to serve the HTML (and the JS that actually does the WS connection).

However, my general advice would be: first investigate if it makes sense to extend the proprietory, closed-source messaging thing (YAMI4), reinventing the wheel versus rather just using Crossbar.io.

Cheers,
/Tobias

···

Am 26.03.2016 um 11:42 schrieb Suman Patro:

Regards,
Suman

On Saturday, March 26, 2016 at 2:58:35 PM UTC+5:30, Suman Patro wrote:

    Hello,
    I would like to use Autobahn websockets for a real time monitoring
    application from the web perspective but with no Crossbar.io. The
    reason being is ; I have an existing message broker for which I plan
    to extend websockets support. I would like to create websocket
    server within the existing broker(the tcp server) using Autobahn and
    would want to perform a similar publish subscribe functionalities as
    provided in the autobahn/example. But I would not want Crossbar.io
    messaging server.
    My system specifications are :
    Windows 8
    MSVC 2012
    Is this possible and how can this be done?
    Regards,
    Suman

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#5

Hello, Tobias

Yami4 is written in C and is open source. so won’t be an issue. And Yes, I mean Browser clients. But why will there be requirement of external webserver if webscokets is incorporated within the middleware itself. I have referred another middleware which says no external webserver needed '“http://www.hivemq.com/blog/mqtt-over-websockets-with-hivemq”.

Regards,

Suman

···

On Sat, Mar 26, 2016 at 5:02 PM, Tobias Oberstein tobias.o...@gmail.com wrote:

Yes , definitely .

My existing message broker that I refer is a message oriented

middleware(YAMI4) that is event driven and transfers data to

clients(YAMI4 test clients). Now I would like to improvise YAMI4 to a

web extent by providing websockets support to it. Therefore , I would

like to create websocket server within YAMI4 using Autobahn and refer
Autobahn test examples for publishing and subscribing between YAMI4

clients and webclients . For such a requirement do, I need Crossbar.io,

if yes , why and if no, what should be the procedure to go about?

Even if I create websocket server within YAMI4, do I again need a webserver?
Hi Suman,

Am 26.03.2016 um 11:42 schrieb Suman Patro:

In what language is YAMI4 written? Is it open source? If so, where is the source code?

Not necessarily. Non-browser clients won’t need a Web server. For browser clients, there needs to be a Web server somewhere to serve the HTML (and the JS that actually does the WS connection).

However, my general advice would be: first investigate if it makes sense to extend the proprietory, closed-source messaging thing (YAMI4), reinventing the wheel versus rather just using Crossbar.io.

Cheers,

/Tobias

Regards,

Suman

On Saturday, March 26, 2016 at 2:58:35 PM UTC+5:30, Suman Patro wrote:

Hello,

I would like to use Autobahn websockets for a real time monitoring

application from the web perspective but with no Crossbar.io. The

reason being is ; I have an existing message broker for which I plan

to extend websockets support. I would like to  create websocket

server within the existing broker(the tcp server) using Autobahn and

would want to perform a similar publish subscribe functionalities as

provided in the autobahn/example. But I would not want Crossbar.io

messaging server.

My system specifications are :

Windows 8

MSVC 2012

Is this possible and how can this be done?

Regards,

Suman

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#6

Hello Tobias,

Based on my above post, is it possible to use Autobahn headers and publish -subscribe examples without crossbar.io server platform? If yes, then how? If no, then what else could be done?

Thanks and regards,

Suman

···

On Sat, Mar 26, 2016 at 5:02 PM, Tobias Oberstein tobias.o...@gmail.com wrote:

Yes , definitely .

My existing message broker that I refer is a message oriented

middleware(YAMI4) that is event driven and transfers data to

clients(YAMI4 test clients). Now I would like to improvise YAMI4 to a

web extent by providing websockets support to it. Therefore , I would

like to create websocket server within YAMI4 using Autobahn and refer
Autobahn test examples for publishing and subscribing between YAMI4

clients and webclients . For such a requirement do, I need Crossbar.io,

if yes , why and if no, what should be the procedure to go about?

Even if I create websocket server within YAMI4, do I again need a webserver?
Hi Suman,

Am 26.03.2016 um 11:42 schrieb Suman Patro:

In what language is YAMI4 written? Is it open source? If so, where is the source code?

Not necessarily. Non-browser clients won’t need a Web server. For browser clients, there needs to be a Web server somewhere to serve the HTML (and the JS that actually does the WS connection).

However, my general advice would be: first investigate if it makes sense to extend the proprietory, closed-source messaging thing (YAMI4), reinventing the wheel versus rather just using Crossbar.io.

Cheers,

/Tobias

Regards,

Suman

On Saturday, March 26, 2016 at 2:58:35 PM UTC+5:30, Suman Patro wrote:

Hello,

I would like to use Autobahn websockets for a real time monitoring

application from the web perspective but with no Crossbar.io. The

reason being is ; I have an existing message broker for which I plan

to extend websockets support. I would like to  create websocket

server within the existing broker(the tcp server) using Autobahn and

would want to perform a similar publish subscribe functionalities as

provided in the autobahn/example. But I would not want Crossbar.io

messaging server.

My system specifications are :

Windows 8

MSVC 2012

Is this possible and how can this be done?

Regards,

Suman

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#7

Hi Suman!

A Web server is needed for HTML browser clients - for normal usage. You can, of course, load the HTML etc. from the local filesystem.

You ask:

“Based on my above post, is it possible to use Autobahn headers and publish -subscribe examples without crossbar.io server platform?”

I do not fully understand the question. Do you mean:

  1. Can Autobahn/WAMP be used without a router?

  2. Can you use code from the Autobahn libraries?

If 1., then the answer is a clear No: WAMP is a routed protocol, so you need a router.

If 2., then the answer is yes: the code is under MIT license, so use anything from it as you see fit. Similarly, the protocol is open, so you’re free to take whatever seems useful to you from it (just don’t call the result “WAMP”).

Regards,

Alex

0 Likes

#8

Thank you, Alexander for your answer. I understood quite a lot of things.

My earlier question stated that :

If I use Autobahn cpp, will I be able to create a websockets server within yami4(a message broker) to handle real time monitoring feature and use crossbar.io for only webserver support. I would like to handle the bidirectional message handling by creating a websocket server on my own(using Autobahn library)and extend that to yami4?Please do answer.

Thanks and regards,

Suman

···

On Mar 31, 2016 3:23 PM, “‘Alexander Gödde’ via Autobahn” autob...@googlegroups.com wrote:

Hi Suman!

A Web server is needed for HTML browser clients - for normal usage. You can, of course, load the HTML etc. from the local filesystem.

You ask:

“Based on my above post, is it possible to use Autobahn headers and publish -subscribe examples without crossbar.io server platform?”

I do not fully understand the question. Do you mean:

  1. Can Autobahn/WAMP be used without a router?
  1. Can you use code from the Autobahn libraries?

If 1., then the answer is a clear No: WAMP is a routed protocol, so you need a router.

If 2., then the answer is yes: the code is under MIT license, so use anything from it as you see fit. Similarly, the protocol is open, so you’re free to take whatever seems useful to you from it (just don’t call the result “WAMP”).

Regards,

Alex

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#9

Thank you, Alexander for your answer. I understood quite a lot of things.
My earlier question stated that :
If I use Autobahn cpp, will I be able to create a websockets server

If you don't use WAMP, you don't need AutobahnCpp, which does not expose WebSocket (but can use it).

I recommend this instead: https://github.com/zaphoyd/websocketpp

Note: AutobahnCpp uses above library for running WAMP over WebSocket.

within yami4(a message broker) to handle real time monitoring feature
and use crossbar.io <http://crossbar.io> for only webserver support. I

You don't need Crossbar.io if you only need a Web server.

I recommend Nginx in that case.

would like to handle the bidirectional message handling by creating a
websocket server on my own(using Autobahn library)and extend that to
yami4?Please do answer.

Yes, you can write plain WebSocket servers using AutobahnPython.

See the many examples:

https://github.com/crossbario/autobahn-python/tree/master/examples/twisted/websocket
https://github.com/crossbario/autobahn-python/tree/master/examples/asyncio/websocket

Cheers,
/Tobias

···

Am 02.04.2016 um 16:36 schrieb Suman Patro:

Thanks and regards,
Suman

On Mar 31, 2016 3:23 PM, "'Alexander Gödde' via Autobahn" > <autob...@googlegroups.com <mailto:autob...@googlegroups.com>> wrote:

    Hi Suman!

    A Web server is needed for HTML browser clients - for normal usage.
    You can, of course, load the HTML etc. from the local filesystem.

    You ask:
    "Based on my above post, is it possible to use Autobahn headers and
    publish -subscribe examples without crossbar.io
    <http://crossbar.io/> server platform?"

    I do not fully understand the question. Do you mean:

    1. Can Autobahn/WAMP be used without a router?
    2. Can you use code from the Autobahn libraries?

    If 1., then the answer is a clear No: WAMP is a routed protocol, so
    you need a router.
    If 2., then the answer is yes: the code is under MIT license, so use
    anything from it as you see fit. Similarly, the protocol is open, so
    you're free to take whatever seems useful to you from it (just don't
    call the result "WAMP").

    Regards,

    Alex

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#10

OK, Tobias. I understand that Autobahn is used to create clients. I could use WAMP protocol similarly in a sense RabbitMQ uses AMQP to build its own server but that should help me in creating something on the server side because my goal is to achieve websocket on an existing server (similar to RabbitMQ). What is the possibility?Thank You for highlighting about Nginx webserver.

One more question that has popped up is:

Does Autobahn provide something to compare and contrast plain http model(polling, long polling, streaming) and the websocket model?

I will look at the python examples too. But my requirement is bit more towards C, C++. See if you could help.

Thanks and regards,

Suman

···

On Sat, Apr 2, 2016 at 8:33 PM, Tobias Oberstein tobias.o...@gmail.com wrote:

Thank you, Alexander for your answer. I understood quite a lot of things.

My earlier question stated that :

If I use Autobahn cpp, will I be able to create a websockets server
Am 02.04.2016 um 16:36 schrieb Suman Patro:

If you don’t use WAMP, you don’t need AutobahnCpp, which does not expose WebSocket (but can use it).

I recommend this instead: https://github.com/zaphoyd/websocketpp

Note: AutobahnCpp uses above library for running WAMP over WebSocket.

within yami4(a message broker) to handle real time monitoring feature

and use crossbar.io <http://crossbar.io> for only webserver support. I
would like to handle the bidirectional message handling by creating a

websocket server on my own(using Autobahn library)and extend that to

yami4?Please do answer.

You don’t need Crossbar.io if you only need a Web server.

I recommend Nginx in that case.

Yes, you can write plain WebSocket servers using AutobahnPython.

See the many examples:

https://github.com/crossbario/autobahn-python/tree/master/examples/twisted/websocket

https://github.com/crossbario/autobahn-python/tree/master/examples/asyncio/websocket

Cheers,

/Tobias

Thanks and regards,

Suman

On Mar 31, 2016 3:23 PM, “‘Alexander Gödde’ via Autobahn”

<autob...@googlegroups.com mailto:autob...@googlegroups.com> wrote:

Hi Suman!



A Web server is needed for HTML browser clients - for normal usage.

You can, of course, load the HTML etc. from the local filesystem.



You ask:

"Based on my above post, is it possible to use Autobahn headers and

publish -subscribe examples without [crossbar.io](http://crossbar.io)

<[http://crossbar.io/](http://crossbar.io/)> server platform?"



I do not fully understand the question. Do you mean:



1. Can Autobahn/WAMP be used without a router?

2. Can you use code from the Autobahn libraries?



If 1., then the answer is a clear No: WAMP is a routed protocol, so

you need a router.

If 2., then the answer is yes: the code is under MIT license, so use

anything from it as you see fit. Similarly, the protocol is open, so

you're free to take whatever seems useful to you from it (just don't

call the result "WAMP").



Regards,



Alex



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#11

Hi Suman,

OK, Tobias. I understand that Autobahn is used to create clients. I

The use cases for the different Autobahns is like this:

AutobahnPython: used to create WebSocket clients and servers, as well as WAMP clients

AutobahnJS, AutobahnCpp: used to create WAMP clients

AutobahnAndroid: used to create WebSocket clients and WAMP clients

could use WAMP protocol similarly in a sense RabbitMQ uses AMQP to build
its own server but that should help me in creating something on the
server side because my goal is to achieve websocket on an existing
server (similar to RabbitMQ). What is the possibility?Thank You for

I don't understand what you want.

highlighting about Nginx webserver.
One more question that has popped up is:
Does Autobahn provide something to compare and contrast plain http
model(polling, long polling, streaming) and the websocket model?
I will look at the python examples too. But my requirement is bit more
towards C, C++. See if you could help.

Sure. As said, if you want to create a WebSocket client or server in C++, I recommend websocketpp.

Cheers,
/Tobias

···

Am 02.04.2016 um 19:50 schrieb Suman Patro:

Thanks and regards,
Suman

On Sat, Apr 2, 2016 at 8:33 PM, Tobias Oberstein > <tobias.o...@gmail.com <mailto:tobias.o...@gmail.com>> wrote:

    Am 02.04.2016 um 16:36 schrieb Suman Patro:

        Thank you, Alexander for your answer. I understood quite a lot
        of things.
        My earlier question stated that :
        If I use Autobahn cpp, will I be able to create a websockets server

    If you don't use WAMP, you don't need AutobahnCpp, which does not
    expose WebSocket (but can use it).

    I recommend this instead: https://github.com/zaphoyd/websocketpp

    Note: AutobahnCpp uses above library for running WAMP over WebSocket.

        within yami4(a message broker) to handle real time monitoring
        feature
        and use crossbar.io <http://crossbar.io> <http://crossbar.io>
        for only webserver support. I

    You don't need Crossbar.io if you only need a Web server.

    I recommend Nginx in that case.

        would like to handle the bidirectional message handling by
        creating a
        websocket server on my own(using Autobahn library)and extend that to
        yami4?Please do answer.

    Yes, you can write plain WebSocket servers using AutobahnPython.

    See the many examples:

    https://github.com/crossbario/autobahn-python/tree/master/examples/twisted/websocket
    https://github.com/crossbario/autobahn-python/tree/master/examples/asyncio/websocket

    Cheers,
    /Tobias

        Thanks and regards,
        Suman

        On Mar 31, 2016 3:23 PM, "'Alexander Gödde' via Autobahn" > <autob...@googlegroups.com > <mailto:autob...@googlegroups.com> > <mailto:autob...@googlegroups.com > <mailto:autob...@googlegroups.com>>> wrote:

             Hi Suman!

             A Web server is needed for HTML browser clients - for
        normal usage.
             You can, of course, load the HTML etc. from the local
        filesystem.

             You ask:
             "Based on my above post, is it possible to use Autobahn
        headers and
             publish -subscribe examples without crossbar.io
        <http://crossbar.io>
             <http://crossbar.io/> server platform?"

             I do not fully understand the question. Do you mean:

             1. Can Autobahn/WAMP be used without a router?
             2. Can you use code from the Autobahn libraries?

             If 1., then the answer is a clear No: WAMP is a routed
        protocol, so
             you need a router.
             If 2., then the answer is yes: the code is under MIT
        license, so use
             anything from it as you see fit. Similarly, the protocol is
        open, so
             you're free to take whatever seems useful to you from it
        (just don't
             call the result "WAMP").

             Regards,

             Alex

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