[Paraview] Paraview Web with SSL

Daniel Zuidinga info at seoaachen.de
Wed Aug 24 17:01:14 EDT 2016


how can I check?

The sessionID is sent to the client. So as far as I understand the http 
requests work, but not the ws?


Am 24.08.2016 um 22:52 schrieb Sebastien Jourdain:
> Are you sure apache has the right to read the /home/daniel/proxy.txt 
> while the launcher is writting it?
>
> Do you see some content that match your sessionId within that file?
>
> On Wed, Aug 24, 2016 at 1:57 PM, Daniel Zuidinga <info at seoaachen.de 
> <mailto:info at seoaachen.de>> wrote:
>
>
>     I changed sessionManagerURL in my html file to
>     vtkWeb.properties.sessionManagerURL instead of
>     http://localhost:8080/paraview. Now I get in firefox:
>
>     Use of getPreventDefault() is deprecated.  Use defaultPrevented
>     instead. jquery-1.8.3.min.js:2:0
>     GET
>     http://localhost/proxy [HTTP/1.1 400 Bad Request 16ms]
>     null Visualizer:42:13
>     Firefox can't establish a connection to the server at
>     ws://localhost/proxy?sessionId=7d12745c-6a34-11e6-a5dc-0016d4e2bc28.
>     autobahn.min.js:114:0
>     GET
>     http://localhost/proxy [HTTP/1.1 400 Bad Request 2ms]
>     null
>
>     ...I think one more thing is needed.
>
>
>
>     Am 24.08.2016 um 21:51 schrieb Daniel Zuidinga:
>>     I had wrong paths in my launcher.config properties.
>>     Now the request gets through and the vtk window opens. But I have
>>     still the ws error. Firefox console:
>>
>>     Firefox can't establish a connection to the server at
>>     ws://localhost/ws. autobahn.min.js:114:0
>>     null Visualizer:42:13
>>     Use of getPreventDefault() is deprecated.  Use defaultPrevented
>>     instead. jquery-1.8.3.min.js:2:0
>>     No launcher found.  Attempting to connect using the direct WS
>>     url. vtkweb-all.js:4456:19
>>
>>     --- vtk window opens, then:
>>
>>     Cross-Origin Request Blocked: The Same Origin Policy disallows
>>     reading the remote resource at http://localhost:8080/paraview.
>>     (Reason: CORS header 'Access-Control-Allow-Origin' missing).
>>     <unknown>
>>     GET
>>     http://localhost/ws [HTTP/1.1 404 Not Found 2ms]
>>     null Visualizer:42:13
>>     Firefox can't establish a connection to the server at
>>     ws://localhost/ws.
>>
>>
>>     Am 24.08.2016 um 19:18 schrieb Sebastien Jourdain:
>>>     Actually the hostname might be an issue if you have several
>>>     network card.
>>>     Can you try to use the computer IP? Or '0.0.0.0' for the
>>>     launcher if that work?
>>>
>>>     Otherwise I did not spotted any issue in your config.
>>>
>>>     On Wed, Aug 24, 2016 at 11:14 AM, Daniel Zuidinga
>>>     <info at seoaachen.de <mailto:info at seoaachen.de>> wrote:
>>>
>>>         - apache 2.4.12
>>>         - modules are enabled
>>>         - launcher.py launches without error, resrouces and apps
>>>         section are in the config file as described in the documentation
>>>         are all ports and hostnames right in my configuration files?
>>>         apache is localhost and paraview also
>>>
>>>
>>>         Am 24.08.2016 um 16:22 schrieb Sebastien Jourdain:
>>>>         Hi Daniel,
>>>>
>>>>         Which version of Apache are you running?
>>>>
>>>>         Did you enabled all the modules?
>>>>
>>>>         $ sudo a2enmod vhost_alias
>>>>         $ sudo a2enmod proxy
>>>>         $ sudo a2enmod proxy_http
>>>>         $ sudo a2enmod proxy_wstunnel
>>>>         $ sudo a2enmod rewrite
>>>>
>>>>         For the launcher configuration, do you have a proper
>>>>         "resources" and "apps" section?
>>>>
>>>>         I'm guessing you are looking at the following documentation
>>>>         pages?
>>>>
>>>>         -
>>>>         https://kitware.github.io/paraviewweb/docs/guides/apache_front_end.html
>>>>         <https://kitware.github.io/paraviewweb/docs/guides/apache_front_end.html>
>>>>         -
>>>>         https://kitware.github.io/paraviewweb/docs/guides/python_launcher.html
>>>>         <https://kitware.github.io/paraviewweb/docs/guides/python_launcher.html>
>>>>
>>>>         Once you have the forwarding of the launcher request
>>>>         working, the next part will be the forwarding of the ws.
>>>>         But we can talk about it when and if you run into issue
>>>>         about it.
>>>>
>>>>         Seb
>>>>
>>>>         On Wed, Aug 24, 2016 at 2:22 AM, Daniel Zuidinga
>>>>         <info at seoaachen.de <mailto:info at seoaachen.de>> wrote:
>>>>
>>>>             I tried to run the launcher as described in the docs.
>>>>             But I am still getting errors when running
>>>>             http://localhost/apps/Visualizer/
>>>>             <http://localhost/apps/Visualizer/>
>>>>
>>>>             Firefox console:
>>>>
>>>>             -------------------------------
>>>>
>>>>             1. when setting sessionManagerURL in html set to
>>>>             vtkWeb.properties.sessionManagerURL:
>>>>
>>>>             POST
>>>>             XHR
>>>>             http://localhost/paraview/ [HTTP/1.1 503 Service
>>>>             Unavailable 48ms]
>>>>             Object { error: "The process did not properly start.…"
>>>>             } Visualizer:42:13
>>>>
>>>>
>>>>             2. when setting sessionManagerURL in html to
>>>>             http://localhost:8080/paraview:
>>>>
>>>>             Firefox can't establish a connection to the server at
>>>>             ws://localhost/ws. autobahn.min.js:114:0
>>>>             null Visualizer:42:13
>>>>             No launcher found. Attempting to connect using the
>>>>             direct WS url. vtkweb-all.js:4456:19
>>>>             Use of getPreventDefault() is deprecated.  Use
>>>>             defaultPrevented instead. jquery-1.8.3.min.js:2:0
>>>>             Cross-Origin Request Blocked: The Same Origin Policy
>>>>             disallows reading the remote resource at
>>>>             http://localhost:8080/paraview. (Reason: CORS header
>>>>             'Access-Control-Allow-Origin' missing). <unknown>
>>>>             GET
>>>>             http://localhost/ws [HTTP/1.1 404 Not Found 12ms]
>>>>             null
>>>>
>>>>
>>>>             So the launcher can't start the pv webserver? But
>>>>             running http://localhost:8080/paraview/1
>>>>             <http://localhost:8080/paraview/1> in browser works but
>>>>             says: {"error": "No session with id: 1"}
>>>>
>>>>
>>>>             My apache config:
>>>>
>>>>             -----------------------------
>>>>
>>>>             <VirtualHost *:80>
>>>>                 ServerName localhost
>>>>                 ServerAdmin info at seoaachen.de
>>>>             <mailto:info at seoaachen.de>
>>>>                 DocumentRoot
>>>>             /home/daniel/salome_meca/V2016/prerequisites/Paraview-v501_EDF/share/paraview-5.0/www
>>>>                 ErrorLog "logs/pv-error_log"
>>>>                 CustomLog "logs/pv-access_log" common
>>>>                 ### The following commented lines could be useful
>>>>             when running
>>>>                 ### over https and wss:
>>>>                 # SSLEngine On
>>>>                 # SSLCertificateFile
>>>>             /etc/apache2/ssl/your_certificate.crt
>>>>                 # SSLCertificateKeyFile
>>>>             /etc/apache2/ssl/your_domain_key.key
>>>>                 # SSLCertificateChainFile
>>>>             /etc/apache2/ssl/DigiCertCA.crt
>>>>                 #
>>>>                 # <Location ${MY-DOCUMENT-ROOT} >
>>>>                 #   SSLRequireSSL On
>>>>                 #   SSLVerifyClient optional
>>>>                 #   SSLVerifyDepth 1
>>>>                 #   SSLOptions +StdEnvVars +StrictRequire
>>>>                 # </Location>
>>>>                 # Have Apache pass these requests to the launcher :9000
>>>>                 ProxyPass /paraview http://localhost:8080/paraview
>>>>                 # Turn on the rewrite engine
>>>>                 RewriteEngine On
>>>>                 # This is the path the mapping file Jetty creates
>>>>                 RewriteMap session-to-port txt:/home/daniel/proxy.txt
>>>>                 # This is the rewrite condition. Look for anything
>>>>             with a sessionId= in the query part of the URL and
>>>>             capture the value to use below.
>>>>                 RewriteCond %{QUERY_STRING} ^sessionId=(.*)$ [NC]
>>>>                 # This does the rewrite using the mapping file and
>>>>             the sessionId
>>>>                 RewriteRule ^/proxy.*$
>>>>             ws://${session-to-port:%1}/ws [P]
>>>>                 <Directory
>>>>             "/home/daniel/salome_meca/V2016/prerequisites/Paraview-v501_EDF/share/paraview-5.0/www">
>>>>                     Options Indexes FollowSymLinks
>>>>                     Order allow,deny
>>>>                     Allow from all
>>>>                     AllowOverride None
>>>>                     Require all granted
>>>>                 </Directory>
>>>>             </VirtualHost>
>>>>
>>>>
>>>>
>>>>             my launcher.json
>>>>
>>>>             ----------------------------
>>>>
>>>>              "configuration": {
>>>>                         "host" : "localhost",
>>>>
>>>>                         "port" : 8080,
>>>>                         "endpoint": "paraview",
>>>>                         "content": "/.../www",
>>>>                         "proxy_file" : "/home/daniel/proxy.txt",
>>>>             "sessionURL": "ws://localhost/proxy?sessionId=${id}",
>>>>
>>>>                         "timeout" : 25,
>>>>                         "log_dir" : "/home/daniel",
>>>>                         "upload_dir" : "/home/daniel",
>>>>                         "fields" : ["file", "host", "port", "updir"]
>>>>                     },
>>>>
>>>>
>>>>             What am I doing wrong?
>>>>
>>>>
>>>>             Daniel Zuidinga
>>>>             Dipl.-Ing.
>>>>
>>>>             SEO Aachen
>>>>             Passstr. 5
>>>>             52070 Aachen
>>>>
>>>>             Tel   : 0241 / 450 912 67
>>>>             E-Mail:info at seoaachen.de <mailto:info at seoaachen.de>
>>>>             Web   :http://www.seoaachen.de  (nur zum Teil aktuell)
>>>>             Xing  :https://www.xing.com/profile/Daniel_Zuidinga
>>>>             <https://www.xing.com/profile/Daniel_Zuidinga>
>>>>
>>>>             Bald online: Software Tools für Konstrukteure und Bauteilhersteller
>>>>             http://www.engineeringonline.de
>>>>             <http://www.engineeringonline.de>
>>>>
>>>>             Am 22.08.2016 um 22:32 schrieb Sebastien Jourdain:
>>>>>             Hi Daniel,
>>>>>
>>>>>                 I want to use paraview web with SSL. As far as I
>>>>>                 understand I need apache as a proxy server for
>>>>>                 that? Or is it possible with pvpython? 
>>>>>
>>>>>             It might be possible with pvpython, but I've never
>>>>>             done it, I've always used apache to rely on a single
>>>>>             opened port and handle the encryption.
>>>>>
>>>>>                 I have my own launcher which opens pvpython with a
>>>>>                 different port for each user. Is this the right
>>>>>                 way? Will this work with ssl? 
>>>>>
>>>>>             If pvpython directly support the wss connection, you
>>>>>             can be good. Usually the setup, that I do is that I
>>>>>             have Apache serving only the port 443 (https) for both
>>>>>             the static content and the (wss) websocket endpoint.
>>>>>             And I use a mapping file between the Websocket
>>>>>             endpoint that get returned by my launcher and the
>>>>>             host/port I should connect to on the backend to
>>>>>             establish the link between the client and the actual
>>>>>             ParaViewWeb server instance.
>>>>>             But that does not mean, that's the only way to do it
>>>>>             and if you don't mind having several port open, I
>>>>>             don't see why it could not work.
>>>>>
>>>>>                 Concerning:
>>>>>                 https://kitware.github.io/visualizer/docs/
>>>>>                 <https://kitware.github.io/visualizer/docs/> The
>>>>>                 web visuailzer should work via npm installation?
>>>>>                 It does not work for me:
>>>>>                 C:\Users\danie\AppData\Roaming\npm\node_modules\pvw-visualizer\bin\pvw-visualizer-cli.js:41
>>>>>                 var pvPythonExecs =
>>>>>                 find(paraview).filter(function(file) { return
>>>>>                 file.match(/pvpython$/) ||
>>>>>                 file.match(/pvpython.exe$/); });                  
>>>>>                                  ^ TypeError: find(...).filter is
>>>>>                 not a function     at Object.<anonymous>
>>>>>                 (C:\Users\danie\AppData\Roaming\npm\node_modules\pvw-visualizer\bin\pvw-visualizer-cli.js:41:36)
>>>>>                     at Module._compile (module.js:409:26)     at
>>>>>                 Object.Module._extensions..js (module.js:416:10)  
>>>>>                   at Module.load (module.js:343:32)     at
>>>>>                 Function.Module._load (module.js:300:12)     at
>>>>>                 Function.Module.runMain (module.js:441:10)     at
>>>>>                 startup (node.js:139:18)     at node.js:968:3 
>>>>>
>>>>>             Well, I guess I haven't tried to run the new
>>>>>             Visualizer server on a Windows machine.
>>>>>             But with ParaView 5.2 (yet to be released), we should
>>>>>             have a ParaViewWeb back in the binaries. So we should
>>>>>             make sure our Visualizer command line tool work on
>>>>>             that platform as well.
>>>>>             Although, the command line is more for beginners than
>>>>>             anything else as it only simplify the demo usage. In
>>>>>             real word deployment, with a launcher, the true
>>>>>             pvpython command line should be used instead.
>>>>>             Here is an example of what you should see in a working
>>>>>             environment:
>>>>>             $ Visualizer -d ~/Downloads/
>>>>>             ===============================================================================
>>>>>             | Execute:
>>>>>             | $ /Applications/paraview.app/Contents/bin/pvpython
>>>>>             |   -dr
>>>>>             |
>>>>>             /Users/seb/Documents/code/Web2/visualizer/server/pvw-visualizer.py
>>>>>             |   --content
>>>>>             |   /Users/seb/Documents/code/Web2/visualizer/dist
>>>>>             |   --port
>>>>>             |   8080
>>>>>             |   --data
>>>>>             |   /Users/seb/Downloads/
>>>>>             ===============================================================================
>>>>>             [...]
>>>>>             -- Daniel Zuidinga Dipl.-Ing. SEO Aachen Passstr. 5
>>>>>             52070 Aachen Tel   : 0241 / 450 912 67 E-Mail:
>>>>>             info at seoaachen.de <mailto:info at seoaachen.de> Web   :
>>>>>             http://www.seoaachen.de (nur zum Teil aktuell) Xing  :
>>>>>             https://www.xing.com/profile/Daniel_Zuidinga
>>>>>             <https://www.xing.com/profile/Daniel_Zuidinga> Bald
>>>>>             online: Software Tools für Konstrukteure und
>>>>>             Bauteilhersteller http://www.engineeringonline.de
>>>>>             <http://www.engineeringonline.de>
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>>>>
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