If you have ever started a program and never finished it, then you may recognize the code below for what it is: an experiment begun but not completed, meant to allow viewing pictures on a server. It is included here as an exercise for the reader to complete and is committed for archival to be run under Python 2.5 or later versions.
Python, 59 lines
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from cPickle import dump, load
from os import basename
from os.path import exists, isdir, join
from sys import argv
from Zcgi import *
image_extentions = '.bmp', '.gif', '.jpg', '.png'
def main():
# Default Settings
title = 'Image Viewer'
image = ''
action = basename(argv[0])
back = ''
forward = ''
hidden = ''
if dictionary is None:
# Nothing To Do
pass
elif dictionary.had_key('directory'):
# Something To Do
if not dictionary.has_key('hidden'):
# Just Began Viewing
if isdir(dictionary['directory']):
# Check For Pickle
image_pickle = join(dictionary['directory'], 'image.pickle')
if exists(image_pickle):
# Load Directory Listing
dir_data = load(file(image_pickle))
else:
# Create Directory Listing
dir_data = update_image_pickle(dictionary['directory'])
# START HERE
image = WHAT_TO_DECIDE_HERE
else:
# Post Error Message
dictionary['directory'] = 'No Such Directory'
else:
# Find Next Image
show_form(title, image, action, back, forward, hidden)
def show_form(*form_settings):
print_html('''<html>
\t<head>
\t\t<title>
\t\t\t%s
\t\t</title>
\t</head>
\t<body>
\t\t<center>%s
\t\t\t<form action="%s">
\t\t\t\t<input type="text" name="directory" size="50"><br>
\t\t\t\t%s<input type="submit" name="browse" value="Browse">%s%s
\t\t\t</form>
\t\t</center>
\t</body>
</html>''' % form_settings)
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The Zcgi module can be found in recipe 475112.
