I'm trying to create a simple REST Web Service using technology WSME reported here:
https://pypi.python.org/pypi/WSME
It's not clear, however, how to proceed. I have successfully installed the package WSME.0.6.4 but I don't understand how to proceed.
On the above link we can see some python code. If I wanted to test the code what should I do? I have to create a .py file? Where this file should be saved? Are there services to be started?
The documentation is not clear: it says "With this published at the / ws path of your application". What application? Do I need to install a Web Server?
Thanks.
You could use a full blown web server to run your application . For example Apache with mod_wsgi or uWSGI , but it is not always necessary .
Also you should choose a web framework to work with .
According WSME doc's it has support for Flask microframework out of the box , which is simple enough to start with .
To get started create a file with the following source code :
from wsgiref.simple_server import make_server
from wsme import WSRoot, expose
class MyService(WSRoot):
#expose(unicode, unicode)
def hello(self, who=u'World'):
return u"Hello {0} !".format(who)
ws = MyService(protocols=['restjson', 'restxml'])
application = ws.wsgiapp()
httpd = make_server('localhost', 8000, application)
httpd.serve_forever()
Run this file and point your web browser to http://127.0.0.1:8000/hello.xml?who=John
you should get <result>Hello John !</result> in response.
In this example we have used python's built in webserver which is a good choice when you need to test something out quickly .
For addition i suggest reading How python web frameworks and WSGI fit together
Related
I finally made a project that I wanted to make since a long time :
I'm using an Arduino Uno to replace my PC power button (with a simple relay) and that Arduino Board is connected to a Raspi 3 for network connection purposes
My wish is to do a webpage (or a API-Like request) that at a touch of a button (preferably in a password-protected page) It'll power the PC on
I know how to code in Python, and my script to control the Arduino is already done but I can't find a way to run, only server-side, a Python Script from a button in a webpage
I found that CherryPy framework but I don't think it'll suit my needs
Can someone give me any ideas about that please?
As already mentioned by #ForceBru, you need a python webserver.
If this can be useful to you, this is a possible unsecure implementation using flask:
from flask import Flask
from flask import request
app = Flask(__name__)
#app.route('/turnOn')
def hello_world():
k = request.args.get('key')
if k == "superSecretKey":
# Do something ..
return 'Ok'
else:
return 'Nope'
If you put this in an app.py name file and, after having installed flask (pip install flask), you run flask run you should be able to see Ok if visiting the url http://localhost:5000/turnOn?key=superSecretKey .
You could write a brief html gui with a button and a key field in a form but I leaves that to you (you need to have fun too!).
To avoid potential security issues you could use a POST method and https.
Look at the flask documentation for more infos.
I have a website (which running in Amazon EC2 Instance) running Python Bottle application with CherryPy as its front end web server.
Now I need to add another website with a different domain name already registered. To reduce the cost, I want to utilize the existing website host to do that.
Obviously, virtual host is the solution.
I know Apache mod_wsgi could play the trick. But I don't want to replace CherryPy.
I've googled a a lot, there are some articles showing how to make virtual hosts on CherryPy, but they all assume Cherrypy as Web Sever + Web application, Not CherrPy as Web server and Bottle as Application.
How to use CherrPy as Web server and Bottle as Application to support multiple virtual hosts?
As you mentioned, use VirtualHost. In the example cherrypy.Application instances are used, but any WSGI callable (e. g. Bottle app) will do.
perhaps you can simply put nginx as reverse proxy and configure it to send the traffic to the two domains to the right upstream (the cherryPy webserver).
Another idea would be to use Nginx (http://wiki.nginx.org/Main) with uWsgi(http://projects.unbit.it/uwsgi/) & (uWsgi-python) plug-in
uWsgi has a module named emperor that you can link vhosts(vassals) in, sort of.
i'm a newbie at this myself, so not necessarily an answer but rather a suggestion to check it out.
just a heads up, uWsgi and Nginx can be a hassle to get it to work, depending on your linux distro. Does work nicely with bottle, tested it myself.
hope it helps
jwalker's answer is pretty clear. In case any CherryPy newbie need whole script for reference, I post one below.
import cherrypy
from bottle import Bottle
import os
app1 = Bottle()
app2 = Bottle()
#app1.route('/')
def homePage():
return "========= home1 ==============="
#app2.route('/')
def homePage_2():
return "========= home2 ==============="
vhost = cherrypy._cpwsgi.VirtualHost(None,
domains={
'www.domain1.com': app1,
'www.domain2.com': app2,
}
)
cherrypy.tree.graft(vhost)
cherrypy.config.update({
'server.socket_host': '192.168.1.4',
'server.socket_port': 80,
})
cherrypy.engine.start()
cherrypy.engine.block()
you could make www.domain1.com and www.domain1.com point to one IP adress of you server, so it servers for 2 domain in one Web Server.
I am learning to use the python bottle web framework. I have developed a simple app and I would like to suppress all the requests (urls) output on the terminal (though if there are any error msgs, their output should be ok). I tried setting the DEBUG to False, but that did not make any difference. Is there some other setting for this?
This works for some servers (including wsgiref):
bottle.run(..., quiet=True)
As mentionned by Helgi, the bottle dev server should'nt be used in production. With most of production server, you will not have these logs.
However, if you want to have a quiet dev server, something like this should work.
import bottle
class QuietWSGIRefServer(bottle.WSGIRefServer):
quiet = True
bottle.run(BOTTLE_APP, server=QuietWSGIRefServer)
I hope it helps
How to convert the web site develpoed in django, python into desktop application.
I am new to python and django can you please help me out
Thanks in Advance
I think you should just create an application that connects to the webserver. There is a good answer to getting RESTful API calls into your django application. This means you'd basically just be creating a new front-end for your server.
Using django-rest-interface
It doesn't make sense to rewrite the entire django application as a desktop application. I mean, where do you want to store the data?
For starters, you'll have to replace the web UI with a desktop technology like Tk/Tcl.
If you do that, you may not want to use HTTP as the protocol between the client and the services.
Django is a web framework. If you're switching to a desktop, you'll have to forego Django.
I would try to replicate the Django application functionality with the PyQt toolkit.
You can in fact embed web content in PyQt applications, with the help of QtWebKit. I would post some potentially useful links, but apparently I have too low a reputation to post more than one :)
There are two places you can go to try to decouple the view and put it into a new desktop app. First you can use the existing controller and model and adapt a new view to that. Second, you can use only the existing model and build a new view and controller.
If you haven't adhered closely enough to the MVC principles that you can detach the model from the rest of the application, you can simply rewrite the entire thing. if you are forced to go this route, bail on django and http entirely (as duffymo suggests above).
You have to also evaluate these solutions based upon performance requirements and "heaviness" of the services. If you have stringent performance requirements then relying on the HTTP layer just gets in the way, and providing a simple API into your model is the way to go.
There are clearly a lot of possibly solutions but this is the approach I would take to deciding what the appropriate one is...
It is possible to convert a django application to a desktop app with pywebview with some line of codes. Frist create a python file gui.py in directory where manage.py exists. install pywebview through pip, the write the code in gui.py
import os
import sys
import time
from threading import Thread
import webview
def start_webview():
window = webview.create_window('Hello world', 'http://localhost:8000/', confirm_close=True, width=900, height=600)
webview.start()
window.closed = os._exit(0)
def start_startdjango():
if sys.platform in ['win32', 'win64']:
os.system("python manage.py runserver {}:{}".format('127.0.0.1', '8000'))
# time.sleep(10)
else:
os.system("python3 manage.py runserver {}:{}".format('127.0.0.1', '8000'))
# time.sleep(10)
if __name__ == '__main__':
Thread(target=start_startdjango).start()
start_webview()
then run gui.py with the command python gui.py. IT will create a window like desktop app
There's a project called Camelot which seems to try to combine Django-like features on the desktop using PyQt. Haven't tried it though.
I am thinking about a similar Problem.
Would it be enough to habe a minimal PyQt Gui that enables you to present the djando-website from localhost (get rid of TCP/HTTPS on loop interface somehow) via QtWebkit?
All you seem to need is to have a minimal Python-Broser, that surfs the build in Webserver (and i guess you could even call Django directly for the html-payload without going over the HTTP/TCP layers).
I have django manage.py runserver in .bat file and a localhost bookmark bar in a browser and whola a django-desktop-app. Or make your own browser that opens localhost. Creating a web-browser with Python and PyQT
I've created a web.py application, and now that it is ready to be deployed, I want to run in not on web.py's built-in webserver. I want to be able to run it on different webservers, Apache or IIS, without having to change my application code. This is where WSGI is supposed to come in, if I understand it correctly.
However, I don't understand what exacly I have to do to make my application deployable on a WSGI server? Most examples assume you are using Pylons/Django/other-framework, on which you simply run some magic command which fixes everything for you.
From what I understand of the (quite brief) web.py documentation, instead of running web.application(...).run(), I should use web.application(...).wsgifunc(). And then what?
Exactly what you need to do to host it with a specific WSGI hosting mechanism varies with the server.
For the case of Apache/mod_wsgi and Phusion Passenger, you just need to provide a WSGI script file which contains an object called 'application'. For web.py 0.2, this is the result of calling web.wsgifunc() with appropriate arguments. For web.py 0.3, you instead use wsgifunc() member function of object returned by web.application(). For details of these see mod_wsgi documentation:
http://code.google.com/p/modwsgi/wiki/IntegrationWithWebPy
If instead you are having to use FASTCGI, SCGI or AJP adapters for a server such as Lighttpd, nginx or Cherokee, then you need to use 'flup' package to provide a bridge between those language agnostic interfaces and WSGI. This involves calling a flup function with the same WSGI application object above that something like mod_wsgi or Phusion Passenger would use directly without the need for a bridge. For details of this see:
http://trac.saddi.com/flup/wiki/FlupServers
Important thing is to structure your web application so that it is in its own self contained set of modules. To work with a particular server, then create a separate script file as necessary to bridge between what that server requires and your application code. Your application code should always be outside of the web server document directory and only the script file that acts as bridge would be in server document directory if appropriate.
As of July 21 2009, there is a much fuller installation guide at the webpy install site, that discusses flup, fastcgi, apache and more. I haven't yet tried it, but it seems like it's much more detailed.
Here is an example of two hosted apps using cherrypy wsgi server:
#!/usr/bin/python
from web import wsgiserver
import web
# webpy wsgi app
urls = (
'/test.*', 'index'
)
class index:
def GET(self):
web.header("content-type", "text/html")
return "Hello, world1!"
application = web.application(urls, globals(), autoreload=False).wsgifunc()
# generic wsgi app
def my_blog_app(environ, start_response):
status = '200 OK'
response_headers = [('Content-type','text/plain')]
start_response(status, response_headers)
return ['Hello world! - blog\n']
"""
# single hosted app
server = wsgiserver.CherryPyWSGIServer(
('0.0.0.0', 8070), application,
server_name='www.cherrypy.example')
"""
# multiple hosted apps with WSGIPathInfoDispatcher
d = wsgiserver.WSGIPathInfoDispatcher({'/test': application, '/blog': my_blog_app})
server = wsgiserver.CherryPyWSGIServer(('0.0.0.0', 8070), d)
server.start()