How do I deploy web2py on PythonAnywhere? - python

How do i get a basic web2py server up and running on
PythonAnywhere?

[update - 29/05] We now have a big button on the web tab that will do all this stuff for you. Just click where it says Web2Py, fill in your admin password, and you're good to go.
Here's the old stuff for historical interest...
I'm a PythonAnywhere developer. We're not massive web2py experts (yet?) but I've managed to get web2py up and running like this:
First download and unpack web2py:
wget http://www.web2py.com/examples/static/web2py_src.zip
unzip web2py_src.zip
Go to the PythonAnywhere "Web" panel and edit your wsgi.py. Add these lines:
import os
import sys
path = '/home/my_username/web2py'
if path not in sys.path:
sys.path.append(path)
from wsgihandler import application
replacing my_username with your username.
You will also need to comment out the last two lines in wsgi.py, where we have the default hello world web.py application...
# comment out these two lines if you want to use another framework
#app = web.application(urls, globals())
#application = app.wsgifunc()
Thanks to Juan Martinez for his instructions on this part, which you can view here:
http://web2py.pythonanywhere.com/
then open a Bash console, and cd into the main web2py folder, then run
python web2py.py --port=80
enter admin password
press ctrl-c
(this will generate the parameters_80.py config file)
then go to your Web panel on PythonAnywhere, click reload web app,
and things should work!

You can also simply run this bash script:
http://pastebin.com/zcA5A89k
admin will be disabled because of no HTTPS unless you bypass it as in the previous post. It will create a security vulnerability.

Pastebin was down, I retrieved this from the cache.
cd ~
wget -O web2py_srz.zip http://web2py.com/examples/static/web2py_src.zip
unzip web2py_src.zip
echo "
PATH = '/home/"`whoami`"/web2py'
import os
import sys
sys.stdout = sys.stderr
os.chdir(PATH)
if not './' in sys.path[:1]: sys.path.insert(0,'./')
from gluon.main import wsgibase as application
" > /var/www/wsgi.py
cd web2py
python -c "from gluon.main import save_password; save_password(raw_input('admin password: '),433)"

I have recently summarized my experience with deployment of Web2Py on PythonAnywhere here
Hope it helps
NeoToren

I'll try to add something new to the discussion. The EASIEST way I've found is to go here when you aren't logged in. This makes it so you don't have to mess around with the terminal:
https://www.pythonanywhere.com/try-web2py
Come up with a domain name, then you'll get redirected to a page showing your login information and created dashboard for that domain. From there just create an account so your app isn't erased after 24 hours. When you sign up, your app has a 3 month expiry date (if you're not paying). I believe this is a new policy. Then simply go to https://appname.pythonanywhere.com/admin and then enter the password you were given and then upload your Web2Py file into the dashboard and then visit the page.
I'm not sure how to upload a Web2Py app on PythonAnywhere for an existing account, but that's the easiest method I've found.

Related

Python script not run in Django environment

Terminal says that i didn't defined DJANGO_SETTINGS_MODULE but i tried as i thought every method to do it and so far nothing helper (coding on windows)
Can someone help me out please? I am stuck and dont know what to do
Maby this will help - i run my virtual env through Anaconda -
conda activate djangoenv
raise ImproperlyConfigured(django.core.exceptions.ImproperlyConfigured: Requested setting INSTALLED_APPS, but settings are not configured. You must either define the environment variable DJANGO_SETTINGS_MODULE or call settings.configure() before accessing settings.
from faker import Faker
from app.models import AccessRecrod, Webpage, Topic
import random
import django
import os
os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'project.settings')
django.setup()
fakegen = Faker()
topics = ['Search', 'Social', 'Marketplace', 'News', 'Games']
def add_topic():
t = Topic.objects.get_or_create(top_name=random.choice(topics))[0]
t.save()
return t
def populate(N=5):
for entry in range(N):
# get topic for entry
top = add_topic()
# create fake data for entry
fake_url = fakegen.url()
fake_date = fakegen.date()
fake_name = fakegen.company()
# create new webpage entry
webpg = Webpage.objects.get_or_create(
topic=top, url=fake_url, name=fake_name)[0]
# create fake access record
acc_rec = AccessRecrod.objects.get_or_create(
name=webpg, date=fake_date)[0]
if __name__ == '__main__':
print('populating script!')
populate(20)
print('populating complete!')
The Problem is simply your import of models. You just need to setup django before you import anything related to django:
import django
import os
os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'project.settings')
django.setup()
from faker import Faker
from app.models import AccessRecrod, Webpage, Topic
import random
rest of your code
If you check the code in manage.py and django code on github you will essentially find the same sequence of code (besides a lot of additional stuff) when you run a management command by "python manage.py your_command"
To use the management command directly as described in the answer from #Code-Apprentice would be the other "normal" or "more django way" to integrate your script.
But you asked for the reason of the error message in your way of doing it.
If you study the complete error trace you will also find that it starts at the import command.
Instead of trying to shoe horn a regular python script into the Django environment like this, I suggest you create a command which you can run with ./manage.py. You can learn how to create your own custom commands here. When you do this correctly, you can run a command like ./manage.py create_topics or whatever name you give your command. This allows manage.py to load the Django environment for you.
Alternatively, you could look at creating fixtures with ./manage.py dumpdata and ./manage.py loaddata. These commands will allow you to create data and save them to a .json file which you can load into your database at any time.

Jinja not imported when executing script from another one

I have a web server with CGI script calling python scripts.
When i try to execute in a main file (test1.py) another script called via
os.system('/var/www/cgi-bin/readIRtemp.py '+arg1+' '+arg2+' '+arg3)
I get his error message in /var/log/apache2/error.log :
import: not found
from: can't read /var/mail/jinja2
this is understandable for me since when called directly from the python console my script works !
its content is:
import sys, os
from jinja2 import Environment, FileSystemLoader, select_autoescape
last20values=sys.argv[1]
currTempInDegreesCelcius=sys.argv[2]
print('test '+last20values+' '+currTempInDegreesCelcius)
env = Environment(
loader=FileSystemLoader('/var/www/html/templates'),
autoescape=select_autoescape(['html', 'xml'])
)
template = env.get_template('IR.html')
updatedTemplate=template.render( arrayOfTemp = last20values, currTemp=currTempInDegreesCelcius)
Html_file=open("/var/www/html/IR.html","w")
Html_file.write(updatedTemplate)
Html_file.close()
I read somewhere something like maybe when calling os.system() the script is running with a different user account or some crazy things like that ... please help!
of course i chmod 777 * everything but that doesnt help ...

How do you define the host for Fabric to push to GitHub?

Original Question
I've got some python scripts which have been using Amazon S3 to upload screenshots taken following Selenium tests within the script.
Now we're moving from S3 to use GitHub so I've found GitPython but can't see how you use it to actually commit to the local repo and push to the server.
My script builds a directory structure similar to \images\228M\View_Use_Case\1.png in the workspace and when uploading to S3 it was a simple process;
for root, dirs, files in os.walk(imagesPath):
for name in files:
filename = os.path.join(root, name)
k = bucket.new_key('{0}/{1}/{2}'.format(revisionNumber, images_process, name)) # returns a new key object
k.set_contents_from_filename(filename, policy='public-read') # opens local file buffers to key on S3
k.set_metadata('Content-Type', 'image/png')
Is there something similar for this or is there something as simple as a bash type git add images command in GitPython that I've completely missed?
Updated with Fabric
So I've installed Fabric on kracekumar's recommendation but I can't find docs on how to define the (GitHub) hosts.
My script is pretty simple to just try and get the upload to work;
from __future__ import with_statement
from fabric.api import *
from fabric.contrib.console import confirm
import os
def git_server():
env.hosts = ['github.com']
env.user = 'git'
env.passowrd = 'password'
def test():
process = 'View Employee'
os.chdir('\Work\BPTRTI\main\employer_toolkit')
with cd('\Work\BPTRTI\main\employer_toolkit'):
result = local('ant viewEmployee_git')
if result.failed and not confirm("Tests failed. Continue anyway?"):
abort("Aborting at user request.")
def deploy():
process = "View Employee"
os.chdir('\Documents and Settings\markw\GitTest')
with cd('\Documents and Settings\markw\GitTest'):
local('git add images')
local('git commit -m "Latest Selenium screenshots for %s"' % (process))
local('git push -u origin master')
def viewEmployee():
#test()
deploy()
It Works \o/ Hurrah.
You should look into Fabric. http://docs.fabfile.org/en/1.4.1/index.html. Automated server deployment tool. I have been using this quite some time, it works pretty fine.
Here is my one of the application which uses it, https://github.com/kracekumar/sachintweets/blob/master/fabfile.py
It looks like you can do this:
index = repo.index
index.add(['images'])
new_commit = index.commit("my commit message")
and then, assuming you have origin as the default remote:
origin = repo.remotes.origin
origin.push()

Python script to run Django commands

I want to run a python scripts which should do:
Create a django project: django-admin startproject foobar
Create a app in the project: python manage.py barfoo
Add an entry of newly created app barfoo in the setting's INSTALLED_APP.
How can I achieve this?
There seems to be a pythonic way to do #1 and #2
https://docs.djangoproject.com/en/dev/ref/django-admin/#running-management-commands-from-your-code
from django.core import management
management.call_command('flush', verbosity=0, interactive=False)
management.call_command('loaddata', 'test_data', verbosity=0)
6 years later I stumbled upon this question trying to figure out how to write some tests for an app which only add a custom template tag that interact with other apps in the project. Hope this can help someone.
Building on #groovehunter answer: the official documentation now (Django 1.10) inculdes this feature outside dev.
Note that you need to change current directory to the created project before call startapp. See this answer for more details
from django.core import management
import os
management.call_command('startproject', 'foobar')
os.chdir('foobar')
management.call_command('startapp', 'barfoo')
or you can use the additional argumento to startproject to create the project in the current directory, if you're sure there won't be problems:
from django.core import management
management.call_command('startproject', 'foobar', '.')
management.call_command('startapp', 'barfoo')
Read a little abour subprocess and Popen method. This might be what you're looking for.
Popen(["django-admin", "startproject", "%s" % your_name ], stdout=PIPE).communicate()
Popen(["python", "manage.py", "%s" % your_app_name ], stdout=PIPE).communicate()
3.
I know that's not a perfect code, but I'm just giving an idea.
with open("settings.py", 'r') as file:
settings = file.readlines()
new_settings = []
for line in settings:
if "INSTALLED APPS" in line:
new_settings.append(line.replace("INSTALLED_APPS = (", "INSTALLED_APPS = (\n'%s'," % your_app_name))
else:
new_settings.append(line)
with open("settings.py", 'w') as file:
file.write("".join(new_settings))

CherryPy3 and IIS 6.0

I have a small Python web application using the Cherrypy framework. I am by no means an expert in web servers.
I got Cherrypy working with Apache using mod_python on our Ubuntu server. This time, however, I have to use Windows 2003 and IIS 6.0 to host my site.
The site runs perfectly as a stand alone server - I am just so lost when it comes to getting IIS running. I have spent the past day Googling and blindly trying any and everything to get this running.
I have all the various tools installed that websites have told me to (Python 2.6, CherrpyPy 3, ISAPI-WSGI, PyWin32) and have read all the documentation I can. This blog was the most helpful:
http://whatschrisdoing.com/blog/2008/07/10/turbogears-isapi-wsgi-iis/
But I am still lost as to what I need to run my site. I can't find any thorough examples or how-to's to even start with. I hope someone here can help!
Cheers.
I run CherryPy behind my IIS sites. There are several tricks to get it to work.
When running as the IIS Worker Process identity, you won't have the same permissions as you do when you run the site from your user process. Things will break. In particular, anything that wants to write to the file system will probably not work without some tweaking.
If you're using setuptools, you probably want to install your components with the -Z option (unzips all eggs).
Use win32traceutil to track down problems. Be sure that in your hook script that you're importing win32traceutil. Then, when you're attempting to access the web site, if anything goes wrong, make sure it gets printed to standard out, it'll get logged to the trace utility. Use 'python -m win32traceutil' to see the output from the trace.
It's important to understand the basic process to get an ISAPI application running. I suggest first getting a hello-world WSGI application running under ISAPI_WSGI. Here's an early version of a hook script I used to validate that I was getting CherryPy to work with my web server.
#!python
"""
Things to remember:
easy_install munges permissions on zip eggs.
anything that's installed in a user folder (i.e. setup develop) will probably not work.
There may still exist an issue with static files.
"""
import sys
import os
import isapi_wsgi
# change this to '/myapp' to have the site installed to only a virtual
# directory of the site.
site_root = '/'
if hasattr(sys, "isapidllhandle"):
import win32traceutil
appdir = os.path.dirname(__file__)
egg_cache = os.path.join(appdir, 'egg-tmp')
if not os.path.exists(egg_cache):
os.makedirs(egg_cache)
os.environ['PYTHON_EGG_CACHE'] = egg_cache
os.chdir(appdir)
import cherrypy
import traceback
class Root(object):
#cherrypy.expose
def index(self):
return 'Hai Werld'
def setup_application():
print "starting cherrypy application server"
#app_root = os.path.dirname(__file__)
#sys.path.append(app_root)
app = cherrypy.tree.mount(Root(), site_root)
print "successfully set up the application"
return app
def __ExtensionFactory__():
"The entry point for when the ISAPIDLL is triggered"
try:
# import the wsgi app creator
app = setup_application()
return isapi_wsgi.ISAPISimpleHandler(app)
except:
import traceback
traceback.print_exc()
f = open(os.path.join(appdir, 'critical error.txt'), 'w')
traceback.print_exc(file=f)
f.close()
def install_virtual_dir():
import isapi.install
params = isapi.install.ISAPIParameters()
# Setup the virtual directories - this is a list of directories our
# extension uses - in this case only 1.
# Each extension has a "script map" - this is the mapping of ISAPI
# extensions.
sm = [
isapi.install.ScriptMapParams(Extension="*", Flags=0)
]
vd = isapi.install.VirtualDirParameters(
Server="CherryPy Web Server",
Name=site_root,
Description = "CherryPy Application",
ScriptMaps = sm,
ScriptMapUpdate = "end",
)
params.VirtualDirs = [vd]
isapi.install.HandleCommandLine(params)
if __name__=='__main__':
# If run from the command-line, install ourselves.
install_virtual_dir()
This script does several things. It (a) acts as the installer, installing itself into IIS [install_virtual_dir], (b) contains the entry point when IIS loads the DLL [__ExtensionFactory__], and (c) it creates the CherryPy WSGI instance consumed by the ISAPI handler [setup_application].
If you place this in your \inetpub\cherrypy directory and run it, it will attempt to install itself to the root of your IIS web site named "CherryPy Web Server".
You're also welcome to take a look at my production web site code, which has refactored all of this into different modules.
OK, I got it working. Thanks to Jason and all his help. I needed to call
cherrypy.config.update({
'tools.sessions.on': True
})
return cherrypy.tree.mount(Root(), '/', config=path_to_config)
I had this in the config file under [/] but for some reason it did not like that. Now I can get my web app up and running - then I think I will try and work out why it needs that config update and doesn't like the config file I have...

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