Error occurred while reading WSGI handler - Deploy django to azure web app

Question

Very related to this post but I don't have the priviledge to comment there so I had to make a new post. Deploy a simple VS2017 Django app to Azure - server error

I followed Silencer's tutorial there and I am getting this error from \LogFiles\wfastcgi.log:

2017-07-28 08:28:57.746719: Activating virtualenv with D:\home\site\wwwroot\env\Scripts\python.exe
2017-07-28 08:28:57.777987: Error occurred while reading WSGI handler:

Traceback (most recent call last):
  File "D:\home\python360x64\wfastcgi.py", line 791, in main
    env, handler = read_wsgi_handler(response.physical_path)
  File "D:\home\python360x64\wfastcgi.py", line 633, in read_wsgi_handler
    handler = get_wsgi_handler(os.getenv("WSGI_HANDLER"))
  File "D:\home\python360x64\wfastcgi.py", line 605, in get_wsgi_handler
    handler = handler()
  File ".\ptvs_virtualenv_proxy.py", line 99, in get_virtualenv_handler
    execfile(activate_this, dict(__file__=activate_this))
  File ".\ptvs_virtualenv_proxy.py", line 27, in execfile
    code = f.read()
  File "D:\Repos\azure-python-siteextensions\source_packages\python.3.6.0\tools\Lib\encodings\cp1252.py", line 23, in decode
UnicodeDecodeError: 'charmap' codec can't decode byte 0x90 in position 2: character maps to <undefined>

I have installed python360x64 as an extension in azure portal, I am using this https://github.com/Azure/azure-sdk-for-python/blob/master/examples/AzureResourceViewer/ptvs_virtualenv_proxy.py And my web.config:

<configuration>
  <system.diagnostics>
    <trace>
      <listeners>
        <add type="Microsoft.WindowsAzure.Diagnostics.DiagnosticMonitorTraceListener, Microsoft.WindowsAzure.Diagnostics, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" name="AzureDiagnostics">
          <filter type="" />
        </add>
      </listeners>
    </trace>
  </system.diagnostics>
  <appSettings>
    <add key="WSGI_ALT_VIRTUALENV_HANDLER" value="django.core.wsgi.get_wsgi_application()" />
    <add key="WSGI_ALT_VIRTUALENV_ACTIVATE_THIS" value="D:\home\site\wwwroot\env\Scripts\python.exe" />
    <add key="WSGI_HANDLER" value="ptvs_virtualenv_proxy.get_virtualenv_handler()" />
    <add key="PYTHONPATH" value="D:\home\site\wwwroot" />
    <add key="DJANGO_SETTINGS_MODULE" value="DjangoWebProject.settings" />
    <add key="WSGI_LOG" value="D:\home\LogFiles\wfastcgi.log"/>
  </appSettings>
  <system.web>
    <compilation debug="true" targetFramework="4.0" />
  </system.web>
  <system.webServer>
    <modules runAllManagedModulesForAllRequests="true" />
    <handlers>
      <add name="Python FastCGI" path="handler.fcgi" verb="*" modules="FastCgiModule" scriptProcessor="D:\home\python360x64\python.exe|D:\home\python360x64\wfastcgi.py" resourceType="Unspecified" requireAccess="Script" />
    </handlers>
    <rewrite>
      <rules>
        <rule name="Static Files" stopProcessing="true">
          <conditions>
            <add input="true" pattern="false" />
          </conditions>
        </rule>
        <rule name="Configure Python" stopProcessing="true">
          <match url="(.*)" ignoreCase="false" />
          <conditions>
            <add input="{REQUEST_URI}" pattern="^/static/.*" ignoreCase="true" negate="true" />
          </conditions>
          <action type="Rewrite" url="handler.fcgi/{R:1}" appendQueryString="true" />
        </rule>
      </rules>
    </rewrite>
  </system.webServer>
</configuration>

My /env/ python version is python360x64. Any help appreciated!

So I googled some and changed the encoding when opening python.exe in ptvs_virtualenv_proxy.py to latin-1, I tried utf-8 but that didn't work either. With latin-1 I get the error: File ".\ptvs_virtualenv_proxy.py", line 31, in execfile exec(code, global_dict) ValueError: source code string cannot contain null bytes — Kapli
– Kapli, Commented Jul 28, 2017 at 9:36

Marjan Kalanaki · Accepted Answer · 2017-08-31 20:06:21Z

1

I had the same problem and finally it was fixed by changing this line in app config:

<add key="WSGI_HANDLER" value="ptvs_virtualenv_proxy.get_virtualenv_handler()" />

to this:

<add key="WSGI_HANDLER" value="myProject.wsgi.application" />

myProject is the name of my django project so you should put the your project's name.

answered Aug 31, 2017 at 20:06

Marjan Kalanaki

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Bhargav Rao · Accepted Answer · 2017-08-21 15:31:27Z

0

I get the same errors in python 3.4. For python 2.7 there is an activate_this.py script, which can help in some way.

Just put the activate_this.py from a python 2.7 virtual environment in the .\env\Scripts folder and changed the path in web.config to point to activate_this.py.

It seems to work. I am just not sure which version of python I am using now as 2.7 is still present on the system.

edited Aug 21, 2017 at 15:31

Bhargav Rao

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answered Aug 21, 2017 at 14:23

Smith

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lirask8 · Accepted Answer · 2017-10-16 20:33:25Z

0

I had same problem, I was wrong in WSGI_HANDLER, for python 3.4 must be:

<add key="WSGI_HANDLER" value="ptvs_virtualenv_proxy.get_venv_handler()" />

answered Oct 16, 2017 at 20:33

lirask8

1

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