Contents
CherryPy
Pythonic, object-oriented web framework
Install on Slackware 14
Check installation
CherryPy test web app
Create folder the web app
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1 mkdir -p /var/www/htdocs/cherrypytest/static
Create file /var/www/htdocs/cherrypytest/cherrypytest.wsgi
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1 import sys
2 sys.stdout = sys.stderr
3 import cherrypy
4
5 cherrypy.config.update({'environment': 'embedded'})
6
7 class HelloWorld(object):
8 @cherrypy.expose
9 def index(self):
10 return "Hello World CherryPy!!!!"
11
12 @cherrypy.expose
13 def add(self,param1,param2):
14 return str( int(param1)+int(param2) )
15
16 @cherrypy.expose
17 @cherrypy.tools.json_in()
18 @cherrypy.tools.json_out()
19 def hellojson(self):
20 # curl -X POST -d "{\"name\":\"jkl\"}" http://localhostcherrypytest/hellojson --header "Content-Type:application/json"
21 inj = cherrypy.request.json
22 return {"message": "hello world " + inj['name'] }
23
24 hello = HelloWorld()
25 #static dir
26 confx={'/static': {'tools.staticdir.on':True ,
27 'tools.staticdir.dir':'/var/www/htdocs/cherrypytest/static',
28 'tools.gzip.on': True,
29 'tools.gzip.mime_types': ['text/*', 'application/*']
30 }}
31
32 application = cherrypy.Application(hello, script_name=None, config=confx)
Create static file
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1 echo "Static Test" > /var/www/htdocs/cherrypytest/static/a.txt
Create entry in /etc/httpd/vhosts.conf
Add entry in /etc/hosts
- 127.0.0.1 localhostcherrypytest
Restart apache
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1 /etc/rc.d/rc.httpd restart
Open the following URLs:
CherryPy configuration location
In Slack14 is in
- /usr/lib/python2.7/site-packages/CherryPy-3.2.2-py2.7.egg/cherrypy/_cpconfig.py
Inside the file look for Config.environments . Run python interactively to check the environments
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1 import cherrypy
2 envs= cherrypy._cpconfig.environments #dictionary
3 envs['embedded']
4 # {'checker.on': True, 'engine.SIGTERM': None, 'request.show_mismatched_params': True, 'request.show_tracebacks': True, 'engine.autoreload_on': False, 'tools.log_headers.on': True, 'log.screen': True, 'engine.SIGHUP': None}
5 envs['production']
6 # {'request.show_tracebacks': False, 'log.screen': False, 'request.show_mismatched_params': False, 'checker.on': False, 'engine.autoreload_on': False, 'tools.log_headers.on': False}
Open URL http://localhostcherrypytest/add/1/2a with environment embedded will show a traceback.
To disable the traceback add the follow inside the class HelloWorld
Templating
Check Python/Jinja2
REST
https://cherrypy.readthedocs.org/en/3.2.6/progguide/REST.html
REST quick tips: http://www.restapitutorial.com/lessons/restquicktips.html
Install python 3.8.5 in raspberry py
Console app
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1 pip install cherrypy routes --user
2 python main.py
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1 import cherrypy
2 import wsgiref.handlers
3
4 class RootUrl:
5 @cherrypy.expose
6 def index(self):
7 return "Hello world!"
8
9 class Middle:
10 @cherrypy.expose
11 def index(self):
12 return "middle"
13
14 class GoodbyeWorld:
15 @cherrypy.expose
16 def index(self,num=None):
17 return "Goodbye World!"
18
19 def main():
20 ru = RootUrl()
21 ru.middle = Middle()
22 ru.middle.goodbye = GoodbyeWorld()
23 cherrypy.server.socket_host = '0.0.0.0'
24 cherrypy.quickstart(ru)
25
26 if __name__ == '__main__':
27 main()
Docker + cherrypy + ubuntu
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1 # build.sh
2 docker build -t test1-image .
3 mkdir mnt_data
4 docker run -p 8181:8080 -d --rm --mount type=bind,source="$(pwd)"/mnt_data,target=/mnt/data test1-image
5 # what is written in the folder /mnt/data located in the container is shared in the folder mnt_data
6 docker run -p 8282:8080 -d --rm \
7 --mount type=bind,source="$(pwd)"/mnt_data,target=/mnt/data \
8 test1-image
9 ab -n 10000 -c 10 http://localhost:8181/ &
10 ab -n 10000 -c 10 http://localhost:8282/ &
11 tail -f mnt_data/filex.log
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1 cd ~
2 cd Documents
3 mkdir test-cherrypy
4 cd test-cherrypy
5 docker build -t test1-image .
6 docker run -p 8181:8080 -d --rm test1-image # expose internal port 8080 to 8181
7 curl localhost:8181
8 docker exec -it 94af745958fa bash
9 # edit main.py to change return message
10 curl localhost:8181/middle/goodbye/
11 docker stop 94af745958fa
Dockerfile
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1 FROM ubuntu:latest
2 RUN apt update
3 RUN apt install -y nano vim python curl
4 RUN curl https://bootstrap.pypa.io/pip/2.7/get-pip.py > get-pip.py
5 RUN python get-pip.py
6 RUN pip install cherrypy routes --user
7 RUN mkdir /app
8 COPY . /app/
9 WORKDIR /app
10 CMD ["python","main.py"]
main.py
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1 import cherrypy
2 import wsgiref.handlers
3 import time
4 import socket
5
6 class RootUrl:
7 @cherrypy.expose
8 def index(self):
9 f=open('/mnt/data/filex.log','a')
10 f.write('%s %f\n'%( socket.gethostname(), time.time()))
11 f.close()
12 return "Hello world ola mundo"
13
14 class Middle:
15 @cherrypy.expose
16 def index(self):
17 return "middle"
18
19 class GoodbyeWorld:
20 @cherrypy.expose
21 def index(self,num=None):
22 return "Goodbye World!"
23
24 def main():
25 ru = RootUrl()
26 ru.middle = Middle()
27 ru.middle.goodbye = GoodbyeWorld()
28 cherrypy.server.socket_host = '0.0.0.0'
29 cherrypy.quickstart(ru)
30
31 if __name__ == '__main__':
32 main()