Differences between revisions 1 and 28 (spanning 27 versions)

CherryPy

Pythonic, object-oriented web framework

http://www.cherrypy.org/

Install on Slackware 14

wget https://pypi.python.org/packages/source/C/CherryPy/CherryPy-3.2.4.tar.gz
cp CherryPy-3.2.4.tar.gz /tmp
cd /tmp
tar xvzf CherryPy-3.2.4.tar.gz
cd CherryPy-3.2.4
python setup.py build
python setup.py install

Check installation

python
Python 2.7.3 (default, Jul  3 2012, 21:16:07) 
[GCC 4.7.1] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import cherrypy
>>> cherrypy.__version__
'3.2.2'
>>> quit()

CherryPy test web app

Create folder the web app

mkdir -p /var/www/htdocs/cherrypytest/static

Create file /var/www/htdocs/cherrypytest/cherrypytest.wsgi

   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                   }}
  29 
  30 application = cherrypy.Application(hello, script_name=None, config=confx)

Create static file

echo "Static Test" > /var/www/htdocs/cherrypytest/static/a.txt

Create entry in /etc/httpd/vhosts.conf

   1 <VirtualHost *:80>
   2     ServerName localhostcherrypytest
   3     DocumentRoot "/var/www/htdocs/cherrypytest"
   4     WSGIScriptAlias / /var/www/htdocs/cherrypytest/cherrypytest.wsgi
   5     <Directory "/var/www/htdocs/cherrypytest">
   6       Require local
   7     </Directory>
   8 </VirtualHost>

Add entry in /etc/hosts

127.0.0.1 localhostcherrypytest

Restart apache

/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

>>> import cherrypy
>>> envs= cherrypy._cpconfig.environments #dictionary
>>> envs['embedded']
{'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}
>>> envs['production']
{'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

   1 class HelloWorld(object):
   2     _cp_config = {'request.show_tracebacks': False}
   3     @cherrypy.expose
   4     def index(self):
   5         return "Hello World CherryPy!!!!"
   6     @cherrypy.expose
   7     def add(self,param1,param2):
   8        return str( int(param1)+int(param2) )

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

tar xvzf Python-3.8.5.tgz
cd Python-3.8.5/
./configure
make clean
make
make install
sudo make install
/usr/local/bin/python3.8 -v
/usr/local/bin/pip3.8 install cherrypy

Console app

   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

   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

   1 docker build -t test1-image .
   2 docker run -p 8181:8080 -d --rm test1-image # expose internal port 8080 to 8181
   3 curl localhost:8181
   4 docker exec -it 94af745958fa bash
   5 # edit main.py to change return message
   6 curl localhost:8181/middle/goodbye/
   7 docker stop 94af745958fa

   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"]

   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()

-  ⇤ ← Revision 1 as of 2013-12-29 19:07:21 → 
  Size: 1411
  Editor: 89
  Comment:
+   ← Revision 28 as of 2021-03-18 20:51:49 → ⇥
  Size: 6779
  Editor: localhost
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 Line 1:
+## page was renamed from CherryPy
-Line 11:
+Line 12:
+ * cd CherryPy-3.2.4
-Line 27:
+Line 29:
+Create folder the web app
 * mkdir -p /var/www/htdocs/cherrypytest/static
-Line 40:
+Line 46:
-Line 44:
+Line 51:
+    @cherrypy.expose
    @cherrypy.tools.json_in()
    @cherrypy.tools.json_out()
    def hellojson(self): 
        #  curl -X POST -d "{\"name\":\"jkl\"}" http://localhostcherrypytest/hellojson --header "Content-Type:application/json"
        inj = cherrypy.request.json
        return {"message": "hello world " + inj['name'] }
-Line 45:
+Line 60:
-application = cherrypy.Application(hello, script_name=None, config=None)
}}}
+#static dir
confx={'/static': {'tools.staticdir.on':True ,
                  'tools.staticdir.dir':'/var/www/htdocs/cherrypytest/static'
                  }}

application = cherrypy.Application(hello, script_name=None, config=confx)
}}}

Create static file
 * echo "Static Test" > /var/www/htdocs/cherrypytest/static/a.txt
-Line 49:
+Line 72:
- * WSGIScriptAlias / /var/www/htdocs/cherrypytest/cherrypytest.wsgi
+{{{#!highlight xml
<VirtualHost *:80>
    ServerName localhostcherrypytest
    DocumentRoot "/var/www/htdocs/cherrypytest"
    WSGIScriptAlias / /var/www/htdocs/cherrypytest/cherrypytest.wsgi
    <Directory "/var/www/htdocs/cherrypytest">
      Require local
    </Directory>
</VirtualHost>
}}}
-Line 57:
+Line 89:
-Open url http://localhostcherrypytest/
+Open the following URLs:
 * http://localhostcherrypytest/
 * http://localhostcherrypytest/add/3/4
 * http://localhostcherrypytest/static/a.txt

== 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
{{{
>>> import cherrypy
>>> envs= cherrypy._cpconfig.environments #dictionary
>>> envs['embedded']
{'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}
>>> envs['production']
{'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
{{{#!highlight python
class HelloWorld(object):
    _cp_config = {'request.show_tracebacks': False}
    @cherrypy.expose
    def index(self):
        return "Hello World CherryPy!!!!"
    @cherrypy.expose
    def add(self,param1,param2):
       return str( int(param1)+int(param2) )
}}}

== 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 ==
 * tar xvzf Python-3.8.5.tgz 
 * cd Python-3.8.5/
 * ./configure 
 * make clean
 * make
 * make install
 * sudo make install
 * /usr/local/bin/python3.8 -v
 * /usr/local/bin/pip3.8 install cherrypy

== Console app ==
 * http://localhost:8080/middle/goodbye/
 * http://localhost:8080/middle
 * http://localhost:8080/
 * pip install cherrypy routes --user
 *  python main.py
{{{#!highlight python
import cherrypy
import wsgiref.handlers

class RootUrl:
  @cherrypy.expose
  def index(self):
    return "Hello world!"

class Middle:
  @cherrypy.expose
  def index(self):
    return "middle"

class GoodbyeWorld:
   @cherrypy.expose
   def index(self,num=None):
     return "Goodbye World!"

def main():
  ru = RootUrl()
  ru.middle = Middle()
  ru.middle.goodbye  = GoodbyeWorld()
  cherrypy.server.socket_host = '0.0.0.0'
  cherrypy.quickstart(ru) 

if __name__ == '__main__':
  main()
}}}

== Docker + cherrypy + ubuntu ==
{{{#!highlight bash
# build.sh 
docker build -t test1-image .
mkdir mnt_data
docker run -p 8181:8080 -d --rm --mount type=bind,source="$(pwd)"/mnt_data,target=/mnt/data test1-image
# what is written in the folder /mnt/data located in the container is shared in the folder mnt_data
docker run -p 8282:8080 -d --rm \
  --mount type=bind,source="$(pwd)"/mnt_data,target=/mnt/data \
  test1-image
ab -n 10000 -c 10 http://localhost:8181/ &
ab -n 10000 -c 10 http://localhost:8282/ &
tail -f mnt_data/filex.log
}}}

{{{#!highlight bash
docker build -t test1-image .
docker run -p 8181:8080 -d --rm test1-image # expose internal port 8080 to 8181
curl localhost:8181
docker exec -it 94af745958fa bash
# edit main.py to change return message
curl localhost:8181/middle/goodbye/
docker stop 94af745958fa
}}}
{{{#!highlight bash
FROM ubuntu:latest
RUN apt update
RUN apt install -y nano vim python curl
RUN curl https://bootstrap.pypa.io/pip/2.7/get-pip.py > get-pip.py
RUN python get-pip.py
RUN pip install cherrypy routes --user
RUN mkdir /app
COPY . /app/
WORKDIR /app
CMD ["python","main.py"]
}}}

{{{#!highlight python
import cherrypy
import wsgiref.handlers
import time
import socket 

class RootUrl:
  @cherrypy.expose
  def index(self):
    f=open('/mnt/data/filex.log','a')
    f.write('%s %f\n'%( socket.gethostname(),  time.time()))
    f.close()
    return "Hello world ola mundo"

class Middle:
  @cherrypy.expose
  def index(self):
    return "middle"

class GoodbyeWorld:
   @cherrypy.expose
   def index(self,num=None):
     return "Goodbye World!"

def main():
  ru = RootUrl()
  ru.middle = Middle()
  ru.middle.goodbye  = GoodbyeWorld()
  cherrypy.server.socket_host = '0.0.0.0'
  cherrypy.quickstart(ru) 

if __name__ == '__main__':
  main()
}}}