Re: WebSocketRequestHandler object not executing javascript code

Matteo Alessandroni Fri, 22 Feb 2019 03:56:32 -0800


On 22/02/19 12:46, Martin Grigorov wrote:

On Fri, Feb 22, 2019 at 1:40 PM Matteo Alessandroni <[email protected]>
wrote:


On 22/02/19 12:28, Matteo Alessandroni wrote:


On 22/02/19 10:31, Martin Grigorov wrote:

On Fri, Feb 22, 2019 at 10:50 AM Matteo Alessandroni
<[email protected]>
wrote:

On 21/02/19 18:50, Martin Grigorov wrote:

On Thu, Feb 21, 2019, 18:29 Matteo Alessandroni <[email protected]
wrote:

On 21/02/19 16:43, Martin Grigorov wrote:

On Thu, Feb 21, 2019 at 5:35 PM Matteo Alessandroni <

[email protected]>

wrote:

On 21/02/19 16:30, Martin Grigorov wrote:

On Thu, Feb 21, 2019 at 5:24 PM Matteo Alessandroni <

[email protected]>

wrote:

On 21/02/19 16:07, Martin Grigorov wrote:

On Thu, Feb 21, 2019 at 4:41 PM Matteo Alessandroni <

[email protected]>

wrote:

On 21/02/19 12:14, Martin Grigorov wrote:

On Thu, Feb 21, 2019 at 12:11 PM Matteo Alessandroni <
[email protected]> wrote:

Hi,

On 21/02/19 11:05, Martin Grigorov wrote:

When the WebSocket connection is established (maybe when the

page

is

loaded) you should see an entry in the Network tab.
If you select this entry then on the right-side you
should see

any

WS

messages to/from the server.

Yes I know how about WS debugging, but I do not see any WS

request

(with

WS devtool filter and without it).

Maybe this is the problem.
If there is no WebSocket response at all then there is no
way the

JS

code

to be executed.

But since your WebSocketBehavior callback method is
executed then

there

must be an established WebSocket connection.
I have no idea what goes wrong.

It is strange because in our application version that uses
Wicket

7.x

see no WS requests in DevTools console as well, but the code is
correctly executed and everything works.
Yes the WebSocket connection seems to be established anyway in

both

our

versions so with both Wicket 7.x and 8.x, but for some
reason the
"appendJavaScript()" method does not work on the
"WebSocketRequestHandler" object with Wicket 8.x.

Is there anything else we can try to make it work?

Put a breakpoint at

https://github.com/apache/wicket/blob/3704144b73521c6b10de5fa7864773230762e86c/wicket-core/src/main/java/org/apache/wicket/page/XmlPartialPageUpdate.java#L141

and see whether it is called.
And another one at

https://github.com/apache/wicket/blob/3704144b73521c6b10de5fa7864773230762e86c/wicket-native-websocket/wicket-native-websocket-core/src/main/java/org/apache/wicket/protocol/ws/api/WebSocketResponse.java#L86

to see whether the XML response is being written back to the

browser

in

the

WebSocketConnection.

Thanks!
Ok the first method [1] was called many times and once was the
one

I'm

interested on where the "script" variable was:

"window.Wicket.WebSocket.send('{"kind":"ADD_ENDPOINT","target":"...","source":"...","scope":"..."}');"

also the second one [2] was called, but *only once* and both the

"text"

and "binary" variables were null.

What is the type of "response" variable at

https://github.com/apache/wicket/blob/3704144b73521c6b10de5fa7864773230762e86c/wicket-core/src/main/java/org/apache/wicket/page/XmlPartialPageUpdate.java#L141

?
It seems it is not WebSocketResponse

Ideed, it's "StringResponse"!
And it's content is something like this:

I didn't expect this!
Can you please put a breakpoint
at org.apache.wicket.response.StringResponse#StringResponse() (the
constructor) and see where it is instantiated.
AjaxRequestHandler uses StringResponse, but WebSocketRequestHandler

does

not.

I'm not completely sure but it seems that all the times the
application
enters in [1] (including when "script" contains "addEnpoint(...)")
and
then the "StringResponse()" constructor is called, the source is [2].

[1]

https://github.com/apache/wicket/blob/3704144b73521c6b10de5fa7864773230762e86c/wicket-core/src/main/java/org/apache/wicket/page/XmlPartialPageUpdate.java#L141

[2]

https://github.com/apache/wicket/blob/3704144b73521c6b10de5fa7864773230762e86c/wicket-core/src/main/java/org/apache/wicket/ajax/AjaxRequestHandler.java#L360

It seems WebSocketRequestHandler#respond() is not called at all.
Put a breakpoint in AbstractWebSocketProcessor and see what happens

there.

Hi,
ok thanks, I did that and the constructor of
"AbstractWebSocketProcessor" is never called!

The constructor should be called when the WS connection is established.
I guess you use wicket-native-websocket-javax.
Check org.apache.wicket.protocol.ws.javax.JavaxWebSocketProcessor and
its
org.apache.wicket.protocol.ws

.javax.JavaxWebSocketProcessor.StringMessageHandler

onMessage() method is called when the client sends something to the
server.
onMessage() delegates
to
org.apache.wicket.protocol.ws

.api.AbstractWebSocketProcessor#broadcastMessage()

where the processing happens, i.e. WebSocketBehavior#onMessage() is
called.

Yes we use "wicket-native-websocket-javax" [1].
What I have just done is putting a breackpoint in both that method
from

"org.apache.wicket.protocol.ws.javax.JavaxWebSocketProcessor#StringMessageHandler

onMessage()" and

"org.apache.wicket.protocol.ws.api.AbstractWebSocketProcessor#broadcastMessage()",

but it does *not* enter there either.

So at that point I have tried to start v2.0.x with Wicket 7.x and
tried to debug the same way, the result is that it enters in [2] only.


[1]
https://github.com/apache/syncope/blob/2_1_X/client/console/pom.xml#L83
[2]

https://github.com/apache/wicket/blob/3704144b73521c6b10de5fa7864773230762e86c/wicket-native-websocket/wicket-native-websocket-javax/src/main/java/org/apache/wicket/protocol/ws/javax/JavaxWebSocketProcessor.java#L65

Sorry I correct myself, I tried again with 2.1.x (Wicket 8.x) and it
entered in [1] and [2].

[1]

https://github.com/apache/wicket/blob/3704144b73521c6b10de5fa7864773230762e86c/wicket-native-websocket/wicket-native-websocket-javax/src/main/java/org/apache/wicket/protocol/ws/javax/JavaxWebSocketProcessor.java#L65

[2]

https://github.com/apache/wicket/blob/3704144b73521c6b10de5fa7864773230762e86c/wicket-native-websocket/wicket-native-websocket-core/src/main/java/org/apache/wicket/protocol/ws/api/AbstractWebSocketProcessor.java#L213


Once the debugger is here set another breakpoint at
https://github.com/apache/wicket/blob/3704144b73521c6b10de5fa7864773230762e86c/wicket-core/src/main/java/org/apache/wicket/request/cycle/RequestCycle.java#L840
and
https://github.com/apache/wicket/blob/3704144b73521c6b10de5fa7864773230762e86c/wicket-core/src/main/java/org/apache/wicket/request/cycle/RequestCycle.java#L871

it seems something removes WebSocketRequestHandler from the pipeline and
that's why its #respond() method is not executed.


Ok, it enters just a couple of times in [1] right after [2] and [3].

[1]https://github.com/apache/wicket/blob/3704144b73521c6b10de5fa7864773230762e86c/wicket-core/src/main/java/org/apache/wicket/request/cycle/RequestCycle.java#L840[2]https://github.com/apache/wicket/blob/3704144b73521c6b10de5fa7864773230762e86c/wicket-native-websocket/wicket-native-websocket-javax/src/main/java/org/apache/wicket/protocol/ws/javax/JavaxWebSocketProcessor.java#L65[3]https://github.com/apache/wicket/blob/3704144b73521c6b10de5fa7864773230762e86c/wicket-native-websocket/wicket-native-websocket-core/src/main/java/org/apache/wicket/protocol/ws/api/AbstractWebSocketProcessor.java#L213

<?xml version="1.0" encoding="UTF-8"?><ajax-response><component
id="id178" ><![CDATA[<span id="id178">
<div class="wizard-form">
<div id="id204">
<div class="wizard-overview">

</div>
<div class="wizard-header">
<div>
<div>
<div class="wizard-step-title">
<div></div>
</div>
<div class="wizard-step-summary">
<div></div>
</div>
</div>
</div>
</div>
<div class="wizard-view">
<div id="id207">
<span id="id226">
<span id="id227">

...

[1]

https://github.com/apache/wicket/blob/3704144b73521c6b10de5fa7864773230762e86c/wicket-core/src/main/java/org/apache/wicket/page/XmlPartialPageUpdate.java#L141

[2]

https://github.com/apache/wicket/blob/3704144b73521c6b10de5fa7864773230762e86c/wicket-native-websocket/wicket-native-websocket-core/src/main/java/org/apache/wicket/protocol/ws/api/WebSocketResponse.java#L86

Thanks

What is the type of resourceCreateEvent.getTarget() ?
Is it WebSocketRequestHandler or AjaxRequestHandler ?

"resourceCreateEvent.getTarget()"type is
"AjaxRequestHandler".

[1]

https://github.com/apache/syncope/blob/2_1_X/client/console/src/main/java/org/apache/syncope/client/console/topology/Topology.java#L602-L609

On 21/02/19 10:01, Martin Grigorov wrote:

Hi,

Check the browser's Dev Tools' console for any JavaScript

errors.

If there are no errors then check in the DevTools
Network tab

whether

the

WebSocket response frame contains the JS code in its
body. It

must

be

inside <execution> XML element. If it is not there at all

then

it

must

be

something on the server side.

On Thu, Feb 21, 2019 at 10:54 AM Matteo Alessandroni <

[email protected]>

wrote:

Hi,

we have a logic where a websocket message is sent from an

"onEvent()"

method [1] and catched in a WebSocketBehavior class [2].
Then, a call to a js method "addEndpoint()"[3] must be

executed.

Our problem is that the js code "addEndpoint(...)" inside
"handler.appendJavaScript(...)" [4] is not executed,
so the

code

correctly reaches that switch case but it's like the
"appendJavaScript(...)" is not working.

On our application v2.0.x that code works and it uses
Wicket

7.x,

while

the newer v2.1.x  uses Wicket 8.x and it does not work.

Could you please give us an hint of this? Is there
anything

we

are

missing to make it work for Wicket 8.x?

Thank you!


[1]

https://github.com/apache/syncope/blob/2_1_X/client/console/src/main/java/org/apache/syncope/client/console/topology/Topology.java#L602-L609

[2]

https://github.com/apache/syncope/blob/2_1_X/client/console/src/main/java/org/apache/syncope/client/console/topology/TopologyWebSocketBehavior.java#L153-L157

[3]

https://github.com/apache/syncope/blob/2_1_X/client/console/src/main/resources/META-INF/resources/js/topology.js#L269-L280

[4]

https://github.com/apache/syncope/blob/2_1_X/client/console/src/main/java/org/apache/syncope/client/console/topology/TopologyWebSocketBehavior.java#L154

--

Dott. Matteo Alessandroni

Software Engineer @ Tirasa S.r.l.

Viale Vittoria Colonna, 97 - 65127 Pescara
Tel +39 0859116307 / FAX +39 0859111173

http://www.tirasa.net

Apache Syncope PMC Member
http://people.apache.org/phonebook.html?uid=skylark17
<http://people.apache.org/phonebook.html?uid=skylark17>

Tirasa S.r.l. <http://www.tirasa.net>

--

Dott. Matteo Alessandroni

Software Engineer @ Tirasa S.r.l.

Viale Vittoria Colonna, 97 - 65127 Pescara
Tel +39 0859116307 / FAX +39 0859111173

http://www.tirasa.net

Apache Syncope PMC Member
http://people.apache.org/phonebook.html?uid=skylark17
<http://people.apache.org/phonebook.html?uid=skylark17>

Tirasa S.r.l. <http://www.tirasa.net>

--

Dott. Matteo Alessandroni

Software Engineer @ Tirasa S.r.l.

Viale Vittoria Colonna, 97 - 65127 Pescara
Tel +39 0859116307 / FAX +39 0859111173

http://www.tirasa.net

Apache Syncope PMC Member
http://people.apache.org/phonebook.html?uid=skylark17
<http://people.apache.org/phonebook.html?uid=skylark17>

Tirasa S.r.l. <http://www.tirasa.net>

--

Dott. Matteo Alessandroni

Software Engineer @ Tirasa S.r.l.

Viale Vittoria Colonna, 97 - 65127 Pescara
Tel +39 0859116307 / FAX +39 0859111173

http://www.tirasa.net

Apache Syncope PMC Member
http://people.apache.org/phonebook.html?uid=skylark17
<http://people.apache.org/phonebook.html?uid=skylark17>

Tirasa S.r.l. <http://www.tirasa.net>

--

Dott. Matteo Alessandroni

Software Engineer @ Tirasa S.r.l.

Viale Vittoria Colonna, 97 - 65127 Pescara
Tel +39 0859116307 / FAX +39 0859111173

http://www.tirasa.net

Apache Syncope PMC Member
http://people.apache.org/phonebook.html?uid=skylark17
<http://people.apache.org/phonebook.html?uid=skylark17>

Tirasa S.r.l. <http://www.tirasa.net>

--

Dott. Matteo Alessandroni

Software Engineer @ Tirasa S.r.l.

Viale Vittoria Colonna, 97 - 65127 Pescara
Tel +39 0859116307 / FAX +39 0859111173

http://www.tirasa.net

Apache Syncope PMC Member
http://people.apache.org/phonebook.html?uid=skylark17
<http://people.apache.org/phonebook.html?uid=skylark17>

Tirasa S.r.l. <http://www.tirasa.net>

--

Dott. Matteo Alessandroni

Software Engineer @ Tirasa S.r.l.

Viale Vittoria Colonna, 97 - 65127 Pescara
Tel +39 0859116307 / FAX +39 0859111173

http://www.tirasa.net

Apache Syncope PMC Member
http://people.apache.org/phonebook.html?uid=skylark17
<http://people.apache.org/phonebook.html?uid=skylark17>

Tirasa S.r.l. <http://www.tirasa.net>

--

Dott. Matteo Alessandroni

Software Engineer @ Tirasa S.r.l.

Viale Vittoria Colonna, 97 - 65127 Pescara
Tel +39 0859116307 / FAX +39 0859111173

http://www.tirasa.net

Apache Syncope PMC Member
http://people.apache.org/phonebook.html?uid=skylark17
<http://people.apache.org/phonebook.html?uid=skylark17>

Tirasa S.r.l. <http://www.tirasa.net>

--

Dott. Matteo Alessandroni

Software Engineer @ Tirasa S.r.l.

Viale Vittoria Colonna, 97 - 65127 Pescara
Tel +39 0859116307 / FAX +39 0859111173

http://www.tirasa.net

Apache Syncope PMC Member
http://people.apache.org/phonebook.html?uid=skylark17
<http://people.apache.org/phonebook.html?uid=skylark17>

Tirasa S.r.l. <http://www.tirasa.net>


--

Dott. Matteo Alessandroni

Software Engineer @ Tirasa S.r.l.

Viale Vittoria Colonna, 97 - 65127 Pescara
Tel +39 0859116307 / FAX +39 0859111173

http://www.tirasa.net

Apache Syncope PMC Member

http://people.apache.org/phonebook.html?uid=skylark17<http://people.apache.org/phonebook.html?uid=skylark17>


Tirasa S.r.l. <http://www.tirasa.net>

Re: WebSocketRequestHandler object not executing javascript code

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