Cs108 - Quiz 4

Front 1

HTML

Back 1

hyper text markup language

Front 2

HTML tags

Back 2

keywords surrounded by angle brackets

Front 3

web application

Back 3

a program (script) that generates a web page dynamically. the application runs every time the web browser loads the page

Front 4

HTML forms

Back 4

used to collect user input. contains form elements. send data to the webserver as specified by a parameter called action

Front 5

form elements

Back 5

different types of input elements, checkboxes, radio buttons, submit buttons, etc.

Front 6

action attribute

Back 6

defines the action to be performed when the form is submitted

Front 7

name attirbute

Back 7

specifies a name used to identify the form

Front 8

Common Gateway Interface (CGI)

Back 8

application waiting to process a form. requires a non-trivial script on the server to process the data.

Python's CGI module provides access to a dict of all form fields and their values:

cgi.FieldStorage() function

if form.has_key("NAME"):

name = form["NAME"].value

print hello(name)

Front 9

checklist for resolving INTERNAL SERVER ERRORS

Back 9

1. python syntax error - do "run/check module" within IDLE and fix all errors

2. Missing or incorrect shebang line; should be: #!usr/bin/python

3. incorrect permissions: should be 755

4. missing HTTP headers (ie. "Content-type: text/html" followed by print

5. smart quotes are NOT valid ASCII characters. must be " " and ' '

Front 10

HTML Links

Back 10

enables us to create hypertext references (links) - a text or an image you can click on, and jump to another document

how to do a link:

Boston University Web Page

Front 11

shebang line

Back 11

#!/usr/bin/python

a directive to tell the web server where to find the python interpreted

Front 12

main section of the program

Back 12

if statement:

if__name__==__"main__":