[Paraview] Embedding the Visualizer app in the browser within an iframe

Tue Jan 24 07:10:26 EST 2017

Hi Seb and Claude,

Thanks for your valuable inputs. I have been able to setup ParaView web on
a windows 10 system and things are working as expected.

I have created a gist (
https://gist.github.com/debopamg/aa497516d79442efa44b8e23838e1235) detailing
the process of setting up the ParaView application and use apache as the
front end server.

Thanks again for your help.

Cheers & Best Wishes,
Debopam
-------------------------------
Cell: +91 98304 10041

On Wed, Jan 18, 2017 at 8:19 PM, Sebastien Jourdain <
sebastien.jourdain at kitware.com> wrote:

> Well we fixed that issue last time in another thread. Here is the
> difference:
>
> Launcher configuration (Not working)
> "C:/paraview/ParaView5.2.0/data"
>
> Command line (Working)
> "C:\paraview\ParaView5.2.0\data"
>
> Do you notice any difference? Do you see what you should try next?
>
> On Wed, Jan 18, 2017 at 4:38 AM, Debopam Ghoshal <debopamg at gmail.com>
> wrote:
>
>> Hi Seb & Claude,
>>
>> Thanks for pointing out the error, but still I am having the same
>> problem. No matter what I do, I am not able to show the figure in the
>> visualizer pane. It is always black/blank. :(
>>
>> This is what I did:
>> 1. Used hard coded (can.ex2)  as well as dynamic (${data}) for the data
>> file,
>> 2. I even hardcoded the data value in the index.html file,
>> 3. I tried using http://paraview as well as http://paraview/?data=can.ex2
>> 4. In the visualizer Files tab, I selected each of the data files (can.ex2,
>> disc_out_ref.ex2, headsq.vti)
>>
>> But in all these cases, I was not able to see any output in the
>> visualizer pane. In each case, the native window name Visualization
>> Toolkit - Win32OpenGL #n showed up with nothing except the orientation
>> axes. The same window showed up within the browser, and when I moved the
>> orientation axes on the browser, the axes also moved in the native window.
>> The later shows that the native window is connected and responds to the
>> browser actions (through web sockets I believe).
>>
>> What I fail to understand is why is the *data file selected from the
>> Files tab* in the Visualizer console (in browser) not showing up in the
>> Visualizer pane. This the seems to be the basic problem. For instance, when
>> I start the Visualizer through the pvpython using the pvw-visualizer.py
>> script it works absolutely ok. Which shows that there is no problem with
>> my graphics card or Paraview installation.
>>
>> *startpvw.bat:*
>>
>> .\bin\pvpython.exe "C:\paraview\ParaView5.2.0\sha
>> re\paraview-5.2\web\visualizer\server\pvw-visualizer.py" --content
>> "C:\paraview\ParaView5.2.0\share\paraview-5.2\web\visualizer\www" --data
>> "C:\paraview\ParaView5.2.0\data" --port 9000
>>
>>
>> But when I run the launcher using the command:
>> *launcher.bat:*
>>
>> set PV_HOME=C:\paraview\ParaView5.2.0
>> %PV_HOME%\bin\pvpython.exe %PV_HOME%\bin\Lib\site-packages\vtk\web\launcher.py
>> %PV_HOME%\launcher.config
>>
>> and then access the visualizer through the apache front end, then the
>> data file is not being rendered.
>>
>> So, I guess there is something wrong with the way I am calling the
>> visualizer from the launcher and the way it is called with the
>> pvw-visualizer.py script.
>>
>> Your continued support is much appreciated. I am attaching the relevant
>> files for your reference.
>>
>>
>> Cheers & Best Wishes,
>> Debopam
>> -------------------------------
>> Cell: +91 98304 10041 <+91%2098304%2010041>
>>
>> On Wed, Jan 18, 2017 at 12:43 AM, Sebastien Jourdain <
>> sebastien.jourdain at kitware.com> wrote:
>>
>>> No worries. Thanks Claude for your help on the mailing list... ;-)
>>>
>>> On Tue, Jan 17, 2017 at 8:52 AM, claude <claude at theweak.link> wrote:
>>>
>>>> Thank you Sebastien! Good catch.
>>>>
>>>> One addition to make sure the path to the file is correct: in the JS of
>>>> the HTML file in the gist, I specified data as being "data:
>>>> getUrlParameter('data') + '.vti'". In your case, the extension of the
>>>> file is .ex2, not vti. So make sure the whole filename is correct, for
>>>> instance specify the extension in the URL and not in the JS:
>>>>
>>>> HTML -> "data: getUrlParameter('data')"
>>>>
>>>> URL  -> http://paraview/?data=can.ex2
>>>>
>>>> (Otherwise it will look for can.ex2.vti which does not exist)
>>>>
>>>> Thanks very much Sebastien!
>>>>
>>>> cheers
>>>>
>>>> On 01/17/2017 09:13 AM, Sebastien Jourdain wrote:
>>>>
>>>> As you can see the issue is right there:
>>>>
>>>> "--load-file", "${data_dir}/can.ex2"
>>>>
>>>>
>>>> As explained by Claude earlier in that same thread:
>>>>
>>>> The option --data specifies the directory, so whatever file you want to
>>>>> load, it must be relative to that directory.
>>>>
>>>>
>>>>
>>>> On Tue, Jan 17, 2017 at 1:38 AM, Debopam Ghoshal <debopamg at gmail.com>
>>>> wrote:
>>>>
>>>>> Hi Claude,
>>>>>
>>>>> Thanks a lot for your time and patience. As I have configured a
>>>>> virtual host in apache, I am using the name of the virtual host (paraview)
>>>>> instead of localhost. So instead of <http://localhost>http://localhost,
>>>>> my url is http://paraview. Please find my response below:
>>>>>
>>>>> - a successful POST request to localhost/paraview
>>>>>
>>>>> The only log that I saw in the developer console was: Navigated to:
>>>>> <http://paraview/>http://paraview/ (Note: I did not give the data
>>>>> because it is already hardcoded in the launcher.config file)
>>>>>
>>>>> - a successful GET request to localhost/proxy
>>>>>
>>>>> Nothing else was displayed in the console. I have attached a snapshot
>>>>> of the network tab (not sure whether it has any relevant information)
>>>>>
>>>>> - then do you get an error such as "can't connect to ws://localhost
>>>>> ..."?
>>>>>
>>>>> I get this error only when I specify "sessionURL" : "
>>>>> ws://paraview:80/ws". When I specify "sessionURL" : "
>>>>> ws://paraview:80/proxy?sessionId=${id}&path=ws" then there is no
>>>>> error.
>>>>> Before starting the test today, I deleted all the log file, and after
>>>>> the test the following are my observations:
>>>>>
>>>>> 1. the *error.log* file is empty
>>>>> 2. the *launcher.log* has some entries, but none of them are errors:
>>>>> 2017-01-17 13:43:17,786:INFO:twisted:Site starting on 9000
>>>>> 2017-01-17 13:43:17,786:INFO:twisted:Starting factory
>>>>> <twisted.web.server.Site instance at 0x0000021F750708C8>
>>>>> 2017-01-17 13:43:53,460:INFO:twisted:"127.0.0.1" - -
>>>>> [17/Jan/2017:08:13:52 +0000] "POST /paraview/ HTTP/1.1" 200 206 "
>>>>> http://paraview/" "Mozilla/5.0 (Windows NT 10.0; WOW64)
>>>>> AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.87 Safari/537.36"
>>>>> 2017-01-17 13:45:01,183:INFO:twisted:Received SIGINT, shutting down.
>>>>> 2017-01-17 13:45:01,183:INFO:twisted:(TCP Port 9000 Closed)
>>>>> 2017-01-17 13:45:01,183:INFO:twisted:Stopping factory
>>>>> <twisted.web.server.Site instance at 0x0000021F750708C8>
>>>>> 2017-01-17 13:45:01,183:INFO:twisted:Main loop terminated.
>>>>> 2017-01-17 13:45:01,183:WARNING:root:Server factory shutting down.
>>>>> Stopping all processes
>>>>>
>>>>> 3. The *session log* file also did not have any errors:
>>>>> 2017-01-17 13:43:52+0530 [-] Log opened.
>>>>> 2017-01-17 13:43:52+0530 [-] Site starting on 9999
>>>>> 2017-01-17 13:43:52+0530 [-] Starting factory <twisted.web.server.Site
>>>>> instance at 0x000001C32C76BF08>
>>>>> 2017-01-17 13:43:54+0530 [HTTPChannel,0,127.0.0.1] Client has
>>>>> reconnected, cancelling reaper
>>>>> 2017-01-17 13:43:54+0530 [HTTPChannel,0,127.0.0.1] on_connect:
>>>>> connection count = 1
>>>>> 2017-01-17 13:43:54+0530 [HTTPChannel,0,127.0.0.1] Property
>>>>> BeginValueCapture has no GetData() method, skipping
>>>>> 2017-01-17 13:43:54+0530 [HTTPChannel,0,127.0.0.1] Property
>>>>> CaptureValuesFloat has no GetData() method, skipping
>>>>> 2017-01-17 13:43:54+0530 [HTTPChannel,0,127.0.0.1] Property
>>>>> CaptureZBuffer has no GetData() method, skipping
>>>>> 2017-01-17 13:43:54+0530 [HTTPChannel,0,127.0.0.1] Property
>>>>> EndValueCapture has no GetData() method, skipping
>>>>> 2017-01-17 13:43:54+0530 [HTTPChannel,0,127.0.0.1] Property
>>>>> StartCaptureLuminance has no GetData() method, skipping
>>>>> 2017-01-17 13:43:54+0530 [HTTPChannel,0,127.0.0.1] Property
>>>>> StopCaptureLuminance has no GetData() method, skipping
>>>>>
>>>>>
>>>>> What is confusing me is that the native rendering panel is coming up
>>>>> on the desktop, but does not show the image to be rendered. The same panel
>>>>> is also coming up as part of the Visualizer pane, and if I move the
>>>>> orientation axis in the browser, then the axes are also moved in the native
>>>>> window. In the attached snapshot, the native window is on your left.
>>>>>
>>>>> Cheers & Best Wishes,
>>>>> Debopam
>>>>> -------------------------------
>>>>> Cell: +91 98304 10041 <+91%2098304%2010041>
>>>>>
>>>>> On Tue, Jan 17, 2017 at 5:28 AM, claude < <claude at theweak.link>
>>>>> claude at theweak.link> wrote:
>>>>>
>>>>>> Hi Debopam,
>>>>>>
>>>>>> Would you mind trying to connect while the web developer console is
>>>>>> on (for Chrome it's under "Tools > Javascript console") and copy/pasting
>>>>>> the errors (if any).
>>>>>>
>>>>>> Do you see:
>>>>>>
>>>>>> - a successful POST request to localhost/paraview
>>>>>>
>>>>>> - a successful GET request to localhost/proxy
>>>>>>
>>>>>> - then do you get an error such as "can't connect to ws://localhost
>>>>>> ..."?
>>>>>>
>>>>>> Also, what do the logs tell you (/path/to/logs/error.log,
>>>>>> /path/to/logs/launcherLog.log and /path/to/logs/<SOME_UID>.txt => fetch the
>>>>>> last one created)?
>>>>>>
>>>>>> cheers
>>>>>>
>>>>>> claude
>>>>>>
>>>>>>
>>>>>> On 01/16/2017 03:56 AM, Debopam Ghoshal wrote:
>>>>>>
>>>>>> Hi Claude,
>>>>>>
>>>>>> I tried using the filename hard coded in the config json as well as
>>>>>> the index.html. But I am not able to view the file in the Visualizer.
>>>>>> It is only showing the blank window/pane with no figure. I can move
>>>>>> the orientation axes, but nothing is being rendered. Even when I choose a
>>>>>> file from the Files tab, nothing is being displayed.
>>>>>>
>>>>>> My launcher config has:
>>>>>>
>>>>>> .......
>>>>>> "properties" : {
>>>>>>     "python_exec" : "C:/paraview/ParaView5.2.0/bin/pvpython.exe",
>>>>>> "visualizer": "C:/paraview/ParaView5.2.0/sha
>>>>>> re/paraview-5.2/web/visualizer/server/pvw-visualizer.py",
>>>>>> "data_dir": "C:/paraview/ParaView5.2.0/data"
>>>>>>   },
>>>>>>   "apps": {
>>>>>>     "visualizer": {
>>>>>>         "cmd": [
>>>>>>             "${python_exec}", "-dr", "${visualizer}", "--port",
>>>>>> "${port}", "--data", "${data_dir}", "--authKey", "${secret}",
>>>>>> "--load-file", "${data_dir}/can.ex2"
>>>>>>         ],
>>>>>>         "ready_line" : "Starting factory"
>>>>>>     }
>>>>>>   }
>>>>>> ......
>>>>>>
>>>>>>
>>>>>> (You can see that the file name is hard coded)
>>>>>>
>>>>>> The launcher.bat script has:
>>>>>>
>>>>>> set PV_HOME=C:\paraview\ParaView5.2.0
>>>>>> %PV_HOME%\bin\pvpython.exe %PV_HOME%\bin\Lib\site-packages\vtk\web\launcher.py
>>>>>> %PV_HOME%\launcher.config
>>>>>>
>>>>>>
>>>>>> However, I am able to view the file when I launch the pvpython.exe
>>>>>> script directly using:
>>>>>> .\bin\pvpython.exe "C:\paraview\ParaView5.2.0\sha
>>>>>> re\paraview-5.2\web\visualizer\server\pvw-visualizer.py" --content
>>>>>> "C:\paraview\ParaView5.2.0\share\paraview-5.2\web\visualizer\www"
>>>>>> --data "C:\paraview\ParaView5.2.0\data" --port 8080
>>>>>>
>>>>>> So, I am guessing I may have mixed up some configuration items
>>>>>> because of which the display is not coming when I try to launch it through
>>>>>> the launcher scirpt/config. Surprisingly, there are no error messages in
>>>>>> the log files. Could you please suggest something.
>>>>>>
>>>>>> I have added the details in the gist for your reference:
>>>>>> <https://gist.github.com/clavicule/7b8b3963ceb17302cff725f8dc36bc57>
>>>>>> https://gist.github.com/clavicule/7b8b3963ceb17302cff725f8dc36bc57
>>>>>>
>>>>>> The screenshots are also attached for your reference.
>>>>>>
>>>>>>
>>>>>> Cheers & Best Wishes,
>>>>>> Debopam
>>>>>> -------------------------------
>>>>>> Cell: +91 98304 10041 <+91%2098304%2010041>
>>>>>>
>>>>>> On Fri, Jan 13, 2017 at 6:04 PM, Claude < <claude at theweak.link>
>>>>>> claude at theweak.link> wrote:
>>>>>>
>>>>>>> Hi Debopam,
>>>>>>>
>>>>>>> Thanks for the added details on the gist and congratulations for
>>>>>>> setting up the server, you are almost there.
>>>>>>> For Visualizer to be able to load a file, it will need the argument
>>>>>>> --load-file (it seems to have disappeared in your config launcher). The
>>>>>>> option --data specifies the directory, so whatever file you want to load,
>>>>>>> it must be relative to that directory. For example to load the data file
>>>>>>> C:/my_data/dir/example1/my_file.vti you could do:
>>>>>>> --data is C:/my_data/dir
>>>>>>> --load-file is example1/my_file.vti
>>>>>>>
>>>>>>> Here is a question for you: do you want to always have the same data
>>>>>>> loaded by default or to be able to specify it?
>>>>>>> * If it's always the same, you can directly hardcode it in the
>>>>>>> launcher config file. Then it will be loaded when you navigate to the
>>>>>>> paraview URL.
>>>>>>> * if it's not always the same, you could use the solution on the
>>>>>>> gist which is specifying it in the URL directly (there are other
>>>>>>> alternatives of course). In that case, the URL must contain the file to
>>>>>>> load (otherwise paraview cannot guess it :)). For instance:
>>>>>>> http://localhost:9000/?data=example1/my_file
>>>>>>>
>>>>>>> (The JavaScript code automatically adds the extension .vti, you may
>>>>>>> change that behavior of course).
>>>>>>>
>>>>>>> I'll be posting the detailed changes on your code in the gist
>>>>>>> comment shortly.
>>>>>>>
>>>>>>> Let me know
>>>>>>> Cheers
>>>>>>> Claude
>>>>>>>
>>>>>>>
>>>>>>> On Jan 13, 2017, at 5:05 AM, Debopam Ghoshal < <debopamg at gmail.com>
>>>>>>> debopamg at gmail.com> wrote:
>>>>>>>
>>>>>>> Hi Claude,
>>>>>>>
>>>>>>> I followed your instructions with some modifications since I was
>>>>>>> having problems. Finally, I was able to configure the Apache front end with
>>>>>>> the ParaView Web launcher, and now I can view the index page of the
>>>>>>> visualizer. However, when I choose any of the sample files, they are not
>>>>>>> being rendered in the visualizer pane.
>>>>>>>
>>>>>>> I have added the details in the gist you created at:
>>>>>>> <https://gist.github.com/>https://gist.github.com/cl
>>>>>>> avicule/7b8b3963ceb17302cff725f8dc36bc57
>>>>>>>
>>>>>>> Would appreciate your thoughts on this.
>>>>>>>
>>>>>>>
>>>>>>> Cheers & Best Wishes,
>>>>>>> Debopam
>>>>>>> -------------------------------
>>>>>>>
>>>>>>>
>>>>>>> On Thu, Jan 12, 2017 at 5:22 PM, Debopam Ghoshal <
>>>>>>> <debopamg at gmail.com>debopamg at gmail.com> wrote:
>>>>>>>
>>>>>>>> Hi Claude
>>>>>>>>
>>>>>>>> Thank you so much for your detailed explanation. The gist has been
>>>>>>>> very useful. I am working on it at present, and is in the process of
>>>>>>>> smoothening out a few creases because of the operating system I am using
>>>>>>>> (Windows 10).
>>>>>>>>
>>>>>>>> Will let you know once I am able to use paraview web properly. And
>>>>>>>> in case of any issue, I will bother you once again.
>>>>>>>>
>>>>>>>> Hi Seb,
>>>>>>>>
>>>>>>>> Thanks for the link. Much appreciated.
>>>>>>>>
>>>>>>>>
>>>>>>>> Cheers & Best Wishes,
>>>>>>>> Debopam
>>>>>>>> -------------------------------
>>>>>>>>
>>>>>>>> On Wed, Jan 11, 2017 at 9:48 PM, Sebastien Jourdain <
>>>>>>>> <sebastien.jourdain at kitware.co>sebastien.jourdain at kitware.com>
>>>>>>>> wrote:
>>>>>>>>
>>>>>>>>> Thanks Claude,
>>>>>>>>>
>>>>>>>>> Here is the add-on of what functions can be called on Visualizer.
>>>>>>>>> (All the function with export)
>>>>>>>>>
>>>>>>>>> <https://github.com/Kitware/vis>https://github.com/Kitware/vis
>>>>>>>>> ualizer/blob/master/src/app.js
>>>>>>>>>
>>>>>>>>> We are planning to add some helper for extracting arguments from
>>>>>>>>> the URL. We actually add a class in the ParaViewWeb repo, but we haven't
>>>>>>>>> got to the point of using it and making it available in visualizer.
>>>>>>>>>
>>>>>>>>> Seb
>>>>>>>>>
>>>>>>>>> On Wed, Jan 11, 2017 at 7:32 AM, claude < <claude at theweak.link>
>>>>>>>>> claude at theweak.link> wrote:
>>>>>>>>>
>>>>>>>>>> Hi Debopam,
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> I think there is one thing to consider first before taking care
>>>>>>>>>> of data being passed through: if you manually start one instance of
>>>>>>>>>> pvw-visualizer, it means all people connecting to port 8080 will see the
>>>>>>>>>> same thing and act on the same viewer, which means potentially conflicting
>>>>>>>>>> with each other action (e.g. a probable disconnection for everyone if one
>>>>>>>>>> decide to exit maybe?). In that case, you need to have a virtual server
>>>>>>>>>> that will launch a new process every time someone connect to port 8080.
>>>>>>>>>> That way, all viewers are independent, the same person can open several
>>>>>>>>>> viewers, etc.
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> Now regarding the data being loaded at startup: you html index
>>>>>>>>>> file should have a function grabbing the 'data' parameter from a URL, a
>>>>>>>>>> form, a dropdown menu, etc. then sending it as a key to the Visualizer
>>>>>>>>>> application (so that the launcher knows which file to load at startup).
>>>>>>>>>>
>>>>>>>>>> It would have been complicated to explain all the details in a
>>>>>>>>>> email, so I made a gist with all the files and "code" addressing both
>>>>>>>>>> points (launcher and data):
>>>>>>>>>>
>>>>>>>>>> <https://gist.github.com/clavic>https://gist.github.com/clavic
>>>>>>>>>> ule/7b8b3963ceb17302cff725f8dc36bc57
>>>>>>>>>>
>>>>>>>>>> Note that this gist was gathered info from the Paraview Web and
>>>>>>>>>> Visualizer online documentations: kuddos to Paraview people.
>>>>>>>>>> 2nd note: in that gist I'm giving the instructions for Apache
>>>>>>>>>> server (you could technically choose any other, e.g. NGinx) for Linux.  I
>>>>>>>>>> see you are on Windows: I don't know how Apache works on Windows but I
>>>>>>>>>> assume (and hope) the steps and config file should be similar.
>>>>>>>>>>
>>>>>>>>>> I hope it helps! Good luck!
>>>>>>>>>> cheers
>>>>>>>>>> claude
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> On 01/11/2017 04:10 AM, Debopam Ghoshal wrote:
>>>>>>>>>>
>>>>>>>>>> Hi,
>>>>>>>>>>
>>>>>>>>>> We have a requirement where our application will send a request
>>>>>>>>>> to the paraview web server to render a specific file (which will be
>>>>>>>>>> available in the data given directory) in the visualizer app, and this will
>>>>>>>>>> be embedded within our application page as a iframe, whose source is the
>>>>>>>>>> Visualizer app's index.html.
>>>>>>>>>>
>>>>>>>>>> We are using the pvpython.exe executable to start the paraview
>>>>>>>>>> web server. The command used to start the server is:
>>>>>>>>>>
>>>>>>>>>> .\bin\pvpython.exe "C:\ParaView-5.2.0-Qt4-OpenGL2
>>>>>>>>>> -MPI-Windows-64bit\share\paraview-5.2\web\visualizer\server\pvw-visualizer.py"
>>>>>>>>>> --content "C:\ParaView-5.2.0-Qt4-OpenGL2
>>>>>>>>>> -MPI-Windows-64bit\share\paraview-5.2\web\visualizer\www" --data
>>>>>>>>>> "C:\ParaView-5.2.0-Qt4-OpenGL2-MPI-Windows-64bit\data" --port
>>>>>>>>>> 8080
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> From the command, we can see that the web content is being served
>>>>>>>>>> from the C:\ParaView-5.2.0-Qt4-OpenGL2-MPI-Windows-64bit\share\pa
>>>>>>>>>> raview-5.2\web\visualizer\www directory. The index.html file
>>>>>>>>>> uses the Visualizer.js script and calls the following functions:
>>>>>>>>>>
>>>>>>>>>> Visualizer.connect({ application: 'visualizer' });
>>>>>>>>>> Visualizer.autoStopServer(10);
>>>>>>>>>>
>>>>>>>>>> Is there any way to find out the available functions in the
>>>>>>>>>> Visualizer.js script and call them from our custom html file? What we
>>>>>>>>>> intend to do is to update the index.html file and
>>>>>>>>>> a. add a javascript function which will accept a filename to be
>>>>>>>>>> rendered
>>>>>>>>>> b. once the filename is received by this function, it will call
>>>>>>>>>> the visualizer and display the specified file
>>>>>>>>>> c. in the visualizer page, the open files tab should be hidden.
>>>>>>>>>>
>>>>>>>>>> Please let me know if you require any clarification.
>>>>>>>>>>
>>>>>>>>>> Cheers & Best Wishes,
>>>>>>>>>> Debopam
>>>>>>>>>> -------------------------------
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
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>>>>>>>>>>
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>>>>>>>>>>
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>>>>>>>>>>
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>
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