[vtkusers] Stream the output of vtkrenderwindow to a HTML5 browser
Sebastien Jourdain
sebastien.jourdain at kitware.com
Sun Nov 15 16:43:30 EST 2015
It seems that you have a twisted version installed inside your system
Python that conflict with the one provided within VTK.
On Sun, Nov 15, 2015 at 2:38 PM, Mengda Wu <wumengda at gmail.com> wrote:
> Hi Sebastien,
>
> Thanks a lot for your reply. I just tried vtk-web with the Cone
> application. But I got some errors when I tested. I used Python 2.7.7 and
> VTK 6.3.0. I am not sure what's wrong.
>
> C:\Library\VTK\VTK-6.3.0\Build\bin\Release>.\vtkpython.exe
> C:\Library\VTK\VTK-6.
> 3.0\Build\Wrapping\Python\vtk\web\vtk_web_cone.py --content
> C:\Library\VTK\VTK-6
> .3.0\Build\www\ --port 3800
> 2015-11-15 15:35:00-0500 [-] Log opened.
> 2015-11-15 15:35:01-0500 [-] Site starting on 3800
> 2015-11-15 15:35:01-0500 [-] Starting factory <twisted.web.server.Site
> instance
> at 0x0000000003E47F48>
> 2015-11-15 15:35:09-0500 [HTTPChannel,0,127.0.0.1] Unhandled Error
> Traceback (most recent call last):
> File
> "C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\protocols
> \basic.py", line 571, in dataReceived
> why = self.lineReceived(line)
> File
> "C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\web\http.
> py", line 1656, in lineReceived
> self.allContentReceived()
> File
> "C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\web\http.
> py", line 1731, in allContentReceived
> req.requestReceived(command, path, version)
> File
> "C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\web\http.
> py", line 827, in requestReceived
> self.process()
> --- <exception caught here> ---
> File
> "C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\web\serve
> r.py", line 189, in process
> self.render(resrc)
> File
> "C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\web\serve
> r.py", line 238, in render
> body = resrc.render(self)
> File
> "C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\web\resou
> rce.py", line 250, in render
> return m(request)
> File
> "C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\web\stati
> c.py", line 631, in render_GET
> producer.start()
> File
> "C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\web\stati
> c.py", line 710, in start
> self.request.registerProducer(self, False)
> File
> "C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\web\http.
> py", line 873, in registerProducer
> self.transport.registerProducer(producer, streaming)
> File
> "C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\internet\
> abstract.py", line 112, in registerProducer
> producer.resumeProducing()
> File
> "C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\web\stati
> c.py", line 720, in resumeProducing
> self.request.write(data)
> File
> "C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\web\serve
> r.py", line 217, in write
> http.Request.write(self, data)
> File
> "C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\web\http.
> py", line 1002, in write
> value = networkString('%s' % (value,))
> File
> "C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\python\co
> mpat.py", line 364, in networkString
> raise TypeError("Can only pass-through bytes on Python 2")
> exceptions.TypeError: Can only pass-through bytes on Python 2
>
> 2015-11-15 15:35:09-0500 [HTTPChannel,0,127.0.0.1] Unhandled Error
> Traceback (most recent call last):
> File
> "C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\web\serve
> r.py", line 321, in processingFailed
> % webutil.formatFailure(reason))
> File
> "C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\web\util.
> py", line 425, in formatFailure
> flattenString(None,
> FailureElement(myFailure)).addBoth(result.append
> )
> File
> "C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\web\_flat
> ten.py", line 420, in flattenString
> d = flatten(request, root, io.write)
> File
> "C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\web\_flat
> ten.py", line 402, in flatten
> _writeFlattenedData(state, write, result)
> --- <exception caught here> ---
> File
> "C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\web\_flat
> ten.py", line 359, in _writeFlattenedData
> element = state.next()
> File
> "C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\web\_flat
> ten.py", line 326, in _flattenTree
> raise FlattenerError(e, roots, extract_tb(exc_info()[2]))
> twisted.web.error.FlattenerError: Exception while flattening:
> <twisted.web.util.FailureElement object at 0x0000000003ED3240>
> File
> "C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\web\_flat
> ten.py", line 317, in _flattenTree
> element = stack[-1].next()
> File
> "C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\web\_flat
> ten.py", line 286, in _flattenElement
> result = root.render(request)
> File
> "C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\web\_elem
> ent.py", line 184, in render
> return loader.load()
> File
> "C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\web\templ
> ate.py", line 465, in load
> self._loadedTemplate = self._loadDoc()
> File
> "C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\web\templ
> ate.py", line 446, in _loadDoc
> f = self._path.open('r')
> File
> "C:\Library\VTK\VTK-6.3.0\Build\Wrapping\Python\twisted\python\fi
> lepath.py", line 828, in open
> return open(self.path, mode + 'b')
> IOError: [Errno 2] No such file or directory:
> 'C:\\Library\\VTK\\VTK-6.3
> .0\\Build\\Wrapping\\Python\\twisted\\web\\failure.xhtml'
>
> Thanks,
> Guanglei
>
> On Sat, Nov 14, 2015 at 11:33 AM, Sebastien Jourdain <
> sebastien.jourdain at kitware.com> wrote:
>
>> Hi Mengda,
>>
>> I guess it depend what kind of data you want to stream.
>> VTK web is already doing that by sending images through Websockets.
>> There is even an option that will send the scene geometry which will let
>> you interact with the scene locally inside your browser.
>>
>> There is several example in the VTK repository that show how to setup a
>> server with a basic VTK application.
>>
>> Seb
>>
>> On Fri, Nov 13, 2015 at 12:46 PM, Mengda Wu <wumengda at gmail.com> wrote:
>>
>>> Hi vtkusers,
>>>
>>> I am thinking to stream the output of vtkrenderwindow to a HTML5
>>> browser. I hope to do an offscreen rendering on the server and stream it
>>> to a HTML5 browser on the client. Is this possible?
>>>
>>> Thanks,
>>> Mengda
>>>
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>>
>
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