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webserver.py
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webserver.py
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from BaseHTTPServer import BaseHTTPRequestHandler, HTTPServer
import cgi
import sys
import sqlalchemy
from sqlalchemy.orm import sessionmaker
from sqlalchemy import create_engine
# import our tables from database_setup module
from database_setup import Restaurant, Base, MenuItem
engine = create_engine(
'sqlite:///restaurantmenu.db')
Base.metadata.bind = engine
# session instance
DBSession = sessionmaker(bind=engine)
# store session globally
session = DBSession()
# test print
# print session.query(Restaurant).all()
class webserverHandler(BaseHTTPRequestHandler):
def do_GET(self):
try:
if self.path.endswith("/restaurants"):
# headers
self.send_response(200)
self.send_header('Content-type', 'text/html')
self.end_headers()
# query a list of all restaurants - returns array
res = session.query(Restaurant).all()
# output
output = ""
output += "<html><body><a href='/restaurants/new'>Add New Restaurant</a>"
output += "<ul>"
# loop through array of restaurants
for restaurant in res:
output += "<li>"
output += restaurant.name
output += " <a href='restaurants/%s/edit'>Edit</a> <a href='restaurants/%s/delete'>Delete</a>" % (restaurant.id, restaurant.id)
output += "</li>"
output += "</ul></html></body>"
# write output
self.wfile.write(output)
return
if self.path.endswith("/restaurants/new"):
# headers
self.send_response(200)
self.send_header('Content-type', 'text/html')
self.end_headers()
# output
output = ""
output += "<form action='/restaurants/new/submit' enctype='multipart/form-data' method='POST'><label for='Name'>Name of the restaurant:</label><input type='text' name='Name'><input type='submit' value='Submit'></form>"
# write output
self.wfile.write(output)
return
if self.path.endswith("/edit"):
# headers
self.send_response(200)
self.send_header('Content-type', 'text/html')
self.end_headers()
# split url and find the ID string
editId = self.path.split("/")[2]
# query for a restaurant with matching ID
restaurant = session.query(Restaurant).filter_by(id=editId).one()
# check if restaurant exists and is not array
if restaurant != []:
# output
output = "<h1>Edit %s</h1>" % restaurant.name
output += "<form action='/restaurants/edit/submit' enctype='multipart/form-data' method='POST'><label for='Name'> Name of the restaurant: </label><input type='number' value='%s' name='id' hidden><input type='text' name='Name'><input type='submit' value='Submit'></form>" % restaurant.id
# write output
self.wfile.write(output)
return
if self.path.endswith("/delete"):
# headers
self.send_response(200)
self.send_header('Content-type', 'text/html')
self.end_headers()
# split url
deleteId = self.path.split("/")[2]
# find restaurant with matching ID
restaurant = session.query(Restaurant).filter_by(id=deleteId).one()
# check if restaurant exists and is not array
if restaurant != []:
# output
output = "<h1>Do you want to delete %s?</h1>" % restaurant.name
output += "<form action='/restaurants/delete/submit' enctype='multipart/form-data' method='POST'><input type='number' value='%s' name='id' hidden><input type='submit' value='Delete'></form>" % restaurant.id
# write output
self.wfile.write(output)
return
except IOError:
self.send_error(404, "File Not Found %s" % self.path)
def do_POST(self):
try:
if self.path.endswith("/restaurants/new/submit"):
# get content type
ctype, pdict = cgi.parse_header(self.headers.getheader('content-type'))
if ctype == 'multipart/form-data':
fields = cgi.parse_multipart(self.rfile, pdict)
messagecontent = fields.get('Name')
# new Restaurant object
new_restaurant = Restaurant(name=messagecontent[0])
# add restaurant to session
session.add(new_restaurant)
# commit restaurant to database
session.commit()
self.send_response(301)
self.send_header('Content-type', 'text/html')
# New Path Location Header
new_path = '%s%s' % ('http://localhost:8080', "/restaurants")
self.send_header('Location', new_path)
self.end_headers()
return
if self.path.endswith("/restaurants/edit/submit"):
# get content type
ctype, pdict = cgi.parse_header(self.headers.getheader('content-type'))
if ctype == 'multipart/form-data':
fields = cgi.parse_multipart(self.rfile, pdict)
name = fields.get('Name')
id = fields.get('id')
# Get a single restaurant with the matching UNIQUE id
restaurant = session.query(Restaurant).filter_by(id=id[0]).one()
# If something was found by restaurant query
if restaurant != []:
restaurant.name = name[0] # change name of the query to name from the form
session.commit() # commit session
# upon success send headers and redirect
self.send_response(301)
self.send_header('Content-type', 'text/html')
# New Path Location Header
new_path = '%s%s' % ('http://localhost:8080', "/restaurants")
self.send_header('Location', new_path)
self.end_headers()
return
if self.path.endswith("/restaurants/delete/submit"):
# get content type
ctype, pdict = cgi.parse_header(self.headers.getheader('content-type'))
if ctype == 'multipart/form-data':
fields = cgi.parse_multipart(self.rfile, pdict)
id = fields.get('id')
# Get a single restaurant with the matching UNIQUE id
restaurant = session.query(Restaurant).filter_by(id=id[0]).one()
session.delete(restaurant)
session.commit()
self.send_response(301)
self.send_header('Content-type', 'text/html')
# New Path Location Header
new_path = '%s%s' % ('http://localhost:8080', "/restaurants")
self.send_header('Location', new_path)
self.end_headers()
return
except:
pass
def main():
try:
port = 8080
server = HTTPServer(('',port), webserverHandler)
print "Web server running on port %s" % port
server.serve_forever()
except KeyboardInterrupt:
print "^C entered, stopping web server..."
server.socket.close()
if __name__ == '__main__':
main()