Help with setting up a Flask application.

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Posts: 3
Joined: 07 Feb 2014, 19:39

Help with setting up a Flask application.

07 Feb 2014, 20:22

Ok, for test I have basic flask application like given on the flask page named in the folder myproject. Here is my code:
Code: Select all
from flask import Flask
application = app = Flask(__name__)

def hello():
    return "Hello World!"

if __name__ == "__main__":

Then I install the Helicon Zoo Python Hosting project template and put it into folder named flask under wwwroot on my IIS.
What do I have to do to be able to run this application on the IIS? I have tried to set
<!-- generic wsgi app -->
<add name="WSGI_APP" value="main.application" />

And set PYTHONPATH to:
<add name="PYTHONPATH" value="%APPL_PHYSICAL_PATH%\venv\lib\site-packages;%APPL_PHYSICAL_PATH%\venv\lib;%APPL_PHYSICAL_PATH%;%APPL_PHYSICAL_PATH%C:\inetpub\wwwroot\flask\myproject;" />

But when I run my page I always get error page.
Code: Select all
500 Error

Helicon Zoo module has caught up an error. Please see the details below.
Worker Status

The process was created

Windows error

The pipe has been ended. (ERROR CODE: 109)

Internal module error

message: ZooApplication backend read Error. type: ZooException file: Jobs\JobBase.cpp line: 566 version:


Empty stderr

Can someone please help me get this app to run on my IIS? I am not experienced with this server config stuff :roll:
Should I make separated file? What would it include and how would I connect it to my views í

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Posts: 110
Joined: 07 Mar 2012, 10:22

Re: Help with setting up a Flask application.

10 Feb 2014, 08:24


I have ran this example flask app on IIS Express with following steps:

1. Install Python project template (New IIS Express web site will be created).
2. Open web console in <you app url>/console (see right link at welcome page) and run 'pip install flask' to install flask in local virtualenv.
3. Place to app root (near web.config).
4. Update web.config:
Code: Select all
<add name="WSGI_APP" value="welcome.application" />

update to
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<add name="WSGI_APP" value="main.application" />

Full web.config:

That`s all, refresh app page in browser.

Note that if you install template in IIS (not IIS Express) not into the site root but into some folder, e.g. myproject, remember:
1. this folder must be a module, i.e. must contain a file and you WSGI_APP will be 'myproject.main.application',
2. URLs in your Flask app should account for this: @app.route("/myproject/")


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Posts: 3
Joined: 07 Feb 2014, 19:39

Re: Help with setting up a Flask application.

10 Feb 2014, 19:02

Thank you! It is running now!

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Joined: 11 Apr 2017, 15:15

Re: Help with setting up a Flask application.

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Re: Help with setting up a Flask application.

28 Feb 2018, 08:06

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