#----- Example of working with Python [cgi] module -----#
import cgi
form = cgi.FieldStorage() # FieldStorage object to
# hold the form data
# check whether a field called "username" was used...
# it might be used multiple times (so sep w/ commas)
if form.has_key('username'):
username = form["username"]
usernames = ""
if type(username) is type([]):
# Multiple username fields specified
for item in username:
if usernames:
# Next item -- insert comma
usernames = usernames + "," + item.value
else:
# First item -- don't insert comma
usernames = item.value
else:
# Single username field specified
usernames = username.value
# just for the fun of it let's create an HTML list
# of all the fields on the calling form
field_list = '\n'
for field in form.keys():
field_list = field_list + '- %s
\n' % field
field_list = field_list + '
\n'
#----------- Writing HTTP header in Python -------------#
print 'Content-type: text/html\n\n'
#----------- Writing HTTP header in Python -------------#
print 'Content-type: image/jpeg\n\n'
#------- Step-by-step HTML creation in Python ----------#
print ''
print 'My Page'
print ''
print 'Powers of two
\n'
for n in range(1,11):
print '- '+str(2**n)+'
'
print '
'
#------- Formatting sprintf()-style in Python ----------#
print """
%s
Famous irrational numbers
- Pi
- %2.3f
- Square-root of 2
- %2.3f
""" % ("Another Page", 3.1415, 1.4142)
#------- Dictionary sprintf()-style in Python ----------#
mydict = {"title":"Formatted from Dict",
"pi": 3.1415, "e": 2.7182,
"sqrt3": 1.73205, "sqrt2": 1.4142}
template = """
%(title)s
Famous irrational numbers
- Pi
- %(pi)2.3f
- Square-root of 2
- %(sqrt2)2.3f
"""
print template % mydict
#---------- Debugging CGI script in Python -------------#
import sys
sys.stderr = sys.stdout
def main():
import cgi
# ...do the actual work of the CGI...
# perhaps ending with:
print template % script_dictionary
print "Content-type: text/html\n\n"
main()
#------- Debugging/logging CGI script in Python --------#
import sys, traceback
print "Content-type: text/html\n\n"
try: # use explicit exception handling
import my_cgi # main CGI functionality in 'my_cgi.py'
my_cgi.main()
except:
import time
errtime = '--- '+ time.ctime(time.time()) +' ---\n'
errlog = open('cgi_errlog', 'a')
errlog.write(errtime)
traceback.print_exc(None, errlog)
print "CGI Error Encountered!"
print "Sorry, a problem was encountered running MyCGI
"
print "Please check the error log on the server for details
"
print ""