Blockchain Nanodegree 预修知识之二：Full Stack Foundations (2)

Lesson 2: Making a Web Server

Note: this course was based on Python 2.7. The The BaseHTTPServer module has been merged into http.server in
Python 3.

Building a Server with `HTTPBaseServer`

from BaseHTTPServer import BaseHTTPRequestHandler, HTTPServer

class webserverHandler(BaseHTTPRequestHandler):
    def do_GET(self):
        try:
            if self.path.endswith("/hello"):
                self.send_response(200)
                self.send_header('Content-type', 'text.html')
                self.end_headers()
                
                output = ""
                ouptut += "<html><body>Hello!</body></html>"
                self.wfile.write(output)
                print output
                return
            
        except IOError:
            self.send_error(404, "File Not Found %s" & self.path)
            

def main():
	try:
        port = 8080
        server = HTTPServer(('',port), webserverHandler)
        print "Web server runningh on port %s" % port
        server.serve_forever
     except KeyboardInterrupt:
        print "^C entered, stopping web server..."
        server.socket.close()

if __name__== '__main__':
    main()

Running a Web Server

python webserver.py

Port Forwarding

(open pages in our browser from the web server from out virtual machine as if they were being run locally)

https://github.com/udacity/fullstack-nanodegree-vm/blob/master/vagrant/Vagrantfile

Responding to Multiple GET Requests

https://github.com/udacity/Full-Stack-Foundations/blob/master/Lesson-2/hola-server/webserver.py

Adding POST to Web Server

def do_POST(self):
	try:
        self.send_response(301)
        self.end_headers()
        ctype.pdit = cgi.parse_header(self.headers.getheader('content-type'))
        if ctype == 'multipart/form-data':
            fields = cgi.parse_multipart(self.rfile, pdict)
            messagecontent = fileds.get('message')
        output = ""
        output += "<html><body>"
        output += "<h2> Okay, how about this: </h2>"
        output += "<h1> %s </h1>" % messagecontent[0]
        output += "<form method='POST' enctype='multipart/form-data' action='/hello'><h2>What would you like me to say?</h2><input name='message' type='text' ><input type='submit' value = 'Submit'> </form>"
        output += "</body></html>"
        self.wfile.write(output)
        print output
     except:
        pass

Adding CRUD to our website

Objectives

list out all restaurants
add edit & delete linkes
create new restaurants
rename a restaurant
delete a restaurant

Tasks

opening http://localhost:8080/restaurants lists all the restaurant names in the database
after the name of each database there is a link to edit and delete each restaurant
there is a page to create new restaurant at http://localhost/8080/restaurants/new with a form for creating a new restaurant.
Users can rename a restaurant by visiting http://localhost:8080/restaurant/id/edit
clicking ‘delete’ takes a user to a confirmation page that then sends a post command to the database o delete the selected retaurant

Solutions

https://github.com/udacity/Full-Stack-Foundations/tree/master/Lesson-2