/Pycon2009/internet/examples/ch20/alt/friends3.py

https://github.com/EnTeQuAk/pydanny-event-notes · Python · 113 lines · 66 code · 22 blank · 25 comment · 15 complexity · 39eed87c519ebf6dc8b35478add86171 MD5 · raw file 

    

  1. #!/usr/bin/env python
    2. 

  2. '''
    3. 

  3. $Id: friends3.py,v 1.1 2000/12/31 01:32:45 wesc Exp $
    4. 

  4. 

  5. Friends CGI demo
    6. 

  6. '''
    7. 

    8. 

  8. import cgi
    9. 

  9. from urllib import quote_plus
    10. 

  10. from string import capwords
    11. 

  11. #from sys import stderr
    12. 

  12. #s = stderr.write
    13. 

  13. 

  14. header = 'Content-Type: text/html\n\n'
    15. 

  15. url = 'http://localhost/cgi-bin/friends3.py'
    16. 

  16. 

  17. errhtml = '''<HTML><HEAD><TITLE>Friends CGI Demo</TITLE></HEAD>
    18. 

  18. <BODY><H3>ERROR</H3>
    19. 

  19. <B>%s</B><P>
    20. 

  20. <FORM><INPUT TYPE=button VALUE=Back ONCLICK="window.history.back()"></FORM>
    21. 

  21. </BODY></HTML>'''
    22. 

    23. 

  23. # showError() --> None
    24. 

  24. def showError(error_str):
    25. 

  25.     'showError() -- display error message'
    26. 

  26.     print header + errhtml % (error_str)
    27. 

  27. 

  28. friendradio = '<INPUT TYPE=radio NAME=howmany VALUE="%s" %s> %s\n'
    29. 

  29. 

  30. formhtml = '''<HTML><HEAD><TITLE>Friends CGI Demo</TITLE></HEAD>
    31. 

  31. <BODY><H3>Friends list for: <I>%s</I></H3>
    32. 

  32. <FORM ACTION="%s">
    33. 

  33. <B>Your Name:</B>
    34. 

  34. <INPUT TYPE=hidden NAME=action VALUE=edit>
    35. 

  35. <INPUT TYPE=text NAME=person VALUE="%s" SIZE=15>
    36. 

  36. <P><B>How many friends do you have?</B>
    37. 

  37. %s
    38. 

  38. <P><INPUT TYPE=submit></FORM></body></html>'''
    39. 

    40. 

  40. # showForm() --> None
    41. 

  41. def showForm(who, howmany):
    42. 

  42.     'showForm() -- presents blank or data-filled form for new input'
    43. 

  43. 

  44.     friends = ''
    45. 

  45.     for i in [0, 10, 25, 50, 100]:
    46. 

  46.         checked = ''
    47. 

  47.         if str(i) == howmany:
    48. 

  48.             checked = 'CHECKED'
    49. 

  49.         friends = friends + friendradio % (str(i), checked, str(i))
    50. 

  50.     print header + formhtml % (who, url, who, friends)
    51. 

  51. 

  52. reshtml = '''<HTML><HEAD><TITLE>Friends CGI Demo</TITLE></HEAD>
    53. 

  53. <BODY><H3>Friends list for: <I>%s</I></H3>
    54. 

  54. Your name is: <B>%s</B><P>
    55. 

  55. You have <B>%s</B> friends.
    56. 

  56. <P>Click <a href="%s">here</a> to edit your data again.
    57. 

  57. </BODY></HTML>'''
    58. 

    59. 

  59. # doResults() --> None
    60. 

  60. def doResults(who, howmany):
    61. 

  61.     'doResults() -- displays results with given form data'
    62. 

  62. 

  63.     # substitute in real name and number of friends and return
    64. 

  64.     newurl = url + '?action=reedit&person=%s&howmany=%s' % (quote_plus(who), howmany)
    65. 

  65.     print header + reshtml % (who, who, howmany, newurl)
    66. 

  66. 

  67. # process() --> None
    68. 

  68. def process():
    69. 

  69.     'process() does all the work:  grabs user data and determines routine to call'
    70. 

  70. 

  71.     error = ''
    72. 

  72. 

  73.     # initialize Data class object
    74. 

  74.     form = cgi.FieldStorage()
    75. 

  75.     #s('name: '+str(form.name)+'\n')
    76. 

  76.     #s('keys: '+str(form.keys())+'\n')
    77. 

  77.     #for i in form.keys():
    78. 

  78.             #s('item: '+str(form[i].name)+' has a value of '+str(form[i].value)+' and is a ' + form[i].__class__.__name__ + '\n')
    79. 

  79. 

  80.     # get user name
    81. 

  81.     if form.has_key('person'):
    82. 

  82.         who = capwords(form['person'].value)
    83. 

  83.     else:
    84. 

  84.         who = 'NEW USER'
    85. 

  85. 

  86.     # get name and number of friends
    87. 

  87.     if form.has_key('howmany'):
    88. 

  88.         howmany = form['howmany'].value
    89. 

  89.     else:
    90. 

  90.         if form.has_key('action') and form['action'].value == 'edit':
    91. 

  91.             error = 'Please select the number of friends you have.'
    92. 

  92.         else:
    93. 

  93.             howmany = 0
    94. 

  94. 

  95.     # no errors, either display form or present results
    96. 

  96.     if not error:
    97. 

  97. 

  98.         # if editing the first time, show results
    99. 

  99.         if form.has_key('action') and form['action'].value != 'reedit':
    100. 

  100.             doResults(who, howmany)
    101. 

  101. 

  102.         # otherwise, show form
    103. 

  103.         else:
    104. 

  104.             showForm(who, howmany)
    105. 

  105. 

  106.     # send error message back if error situation
    107. 

  107.     else:
    108. 

  108.         showError(error)
    109. 

  109. 

  110. 

  111. # invoke if called directly
    112. 

  112. if __name__ == '__main__':
    113. 

  113.     process()
    114.