#Begin copy-and-paste usefulness
import os
import re
import string
import sys
PROGRAM_NAME=''
class CGI:
def __init__(self, vars=[]):
"Initialize variables and run this script."
self.printedHeader = 0
self.workingDir = self.getWorkingDir()
self.programName = PROGRAM_NAME
self.setContextFromEnvironment()
try:
self.run()
except SystemExit:
#If we exit normally, don't print a traceback.
pass
except Exception, arg: #Something went wrong. Print a traceback.
self.printHeader()
print "\n\n"
print "Exception: %s" % arg
import traceback
traceback.print_exc()
print ""
def getWorkingDir(self):
"Get the working directory for this script."
workingDir = './'
if len(sys.argv):
invoked = sys.argv[0]
i = string.rfind(invoked, '/')
if i > 0:
extraPath = invoked[:i+1]
workingDir = os.path.join(os.getcwd(), extraPath)
return workingDir
def setContextFromEnvironment(self):
self.baseURL = '/cgi-bin/msm/'
self.scriptName = None
self.host = None
for var in ['SCRIPT_NAME', '_']:
if not self.baseURL:
path = os.environ.get(var, '')
i = string.rfind(path, '/')
if i > -1 and not (var == '_' and string.find(path[i+1:], 'python') == 0):
#If the executable name begins with 'python', then it's a
#red herring; they fed this script into a Python
#executable and we have no way of getting path information.
self.baseURL = path[:i+1]
self.scriptName = path[i+1:]
if not self.baseURL:
#Uh-oh. Well, they're probably running something from the
#command line (with Python as the interpreter), so they
#probably won't be checking URLs. Let's make the horribly
#misinformed assumption that the URL is '/msm/'.
self.baseURL = '/msm/'
if not self.scriptName:
#Probably 'map.cgi'
self.scriptName = 'map.cgi'
def printHeader(self, type='text/html'):
if not self.printedHeader:
print 'Content-type: %s\n' % type
self.printedHeader = 1
def startPage(self, title='', printTitleAsHeader=0):
self.printHeader()
if title:
title = self.programName + ': ' + title
else:
title = self.programName
print ''
print '%s' % title
if printTitleAsHeader:
print '%s
' % title
def endPage(self):
print ''
def error(self, error):
self.startPage('Error')
print 'Error: %s
' % error
self.endPage()
sys.exit()
def run(self):
"Override this in a subclass."
self.startPage('Nothing Happens')
print "You instantiated CGI directly, or you didn't override run() in your subclass."
self.endPage()
#End copy-and-paste usefulness