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annotate examples/tutorial/geddit/controller.py @ 615:06165fee45ab trunk

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GenshiTutorial: make URLs dynamic so that the app could theoretically be mounted on some other SCRIPT_NAME.
author cmlenz
date Wed, 29 Aug 2007 20:12:54 +0000
parents 1e6cf366b944
children 8ada29c99c0d
rev   line source
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236c351928a2 Add current code for GenshiTutorial to the `examples` directory.
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1 #!/usr/bin/env python
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2
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3 import os
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4 import pickle
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5 import sys
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6
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7 import cherrypy
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8 from formencode import Invalid
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9 from genshi.filters import HTMLFormFiller
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10 from paste.evalexception.middleware import EvalException
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11
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12 from geddit.form import SubmissionForm, CommentForm
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13 from geddit.lib import template
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14 from geddit.model import Submission, Comment
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15
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16
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17 class Root(object):
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18
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19 def __init__(self, data):
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20 self.data = data
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21 self._submission_lookup = {}
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22 self._comment_lookup = {}
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23 for submission in self.data:
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24 self._submission_lookup[submission.code] = submission
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25 for comment in submission.comments:
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26 self._comment_lookup[comment.code] = comment
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27 def _add_replies(comment):
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28 for reply in comment.replies:
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29 self._comment_lookup[reply.code] = reply
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30 _add_replies(comment)
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31
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32 @cherrypy.expose
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33 @template.output('index.html')
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34 def index(self):
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35 return template.render(submissions=self.data)
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36
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37 @cherrypy.expose
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38 @template.output('info.html')
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39 def info(self, code):
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40 submission = self._submission_lookup.get(code)
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41 if not submission:
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42 raise cherrypy.NotFound()
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43 return template.render(submission=submission)
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44
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45 @cherrypy.expose
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46 @template.output('submit.html')
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47 def submit(self, cancel=False, **data):
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48 if cherrypy.request.method == 'POST':
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49 if cancel:
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50 raise cherrypy.HTTPRedirect('/')
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51 form = SubmissionForm()
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52 try:
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53 data = form.to_python(data)
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54 submission = Submission(**data)
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55 self.data.append(submission)
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56 self._comment_lookup[comment.code] = comment
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57 raise cherrypy.HTTPRedirect('/')
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58 except Invalid, e:
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59 errors = e.unpack_errors()
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60 else:
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61 errors = {}
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62
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63 return template.render(errors=errors) | HTMLFormFiller(data=data)
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64
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65 @cherrypy.expose
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66 @template.output('comment.html')
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67 def comment(self, code, cancel=False, **data):
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68 submission = self._submission_lookup.get(code)
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69 if not submission:
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70 raise cherrypy.NotFound()
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71 if cherrypy.request.method == 'POST':
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72 if cancel:
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73 raise cherrypy.HTTPRedirect('/info/%s' % submission.code)
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74 form = CommentForm()
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75 try:
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76 data = form.to_python(data)
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77 comment = submission.add_comment(**data)
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78 self._comment_lookup[comment.code] = comment
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79 raise cherrypy.HTTPRedirect('/info/%s' % submission.code)
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80 except Invalid, e:
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81 errors = e.unpack_errors()
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82 else:
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83 errors = {}
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84
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85 return template.render(submission=submission, comment=None,
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86 errors=errors)
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87
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88 @cherrypy.expose
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89 @template.output('comment.html')
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90 def reply(self, code, cancel=False, **data):
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91 comment = self._comment_lookup.get(code)
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92 submission = comment.submission
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93 if not comment:
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94 raise cherrypy.NotFound()
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95 if cherrypy.request.method == 'POST':
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96 if cancel:
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97 raise cherrypy.HTTPRedirect('/info/%s' % submission.code)
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98 form = CommentForm()
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99 try:
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100 data = form.to_python(data)
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101 comment = comment.add_reply(**data)
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102 self._comment_lookup[comment.code] = comment
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103 raise cherrypy.HTTPRedirect('/info/%s' % submission.code)
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104 except Invalid, e:
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105 errors = e.unpack_errors()
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106 else:
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107 errors = {}
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108
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109 return template.render(submission=submission, comment=comment,
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110 errors=errors)
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111
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112
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113 def main(filename):
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114 # load data from the pickle file, or initialize it to an empty list
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115 if os.path.exists(filename):
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116 fileobj = open(filename, 'rb')
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117 try:
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118 data = pickle.load(fileobj)
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119 finally:
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120 fileobj.close()
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121 else:
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122 data = []
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123
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124 def _save_data():
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125 # save data back to the pickle file
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126 fileobj = open(filename, 'wb')
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127 try:
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128 pickle.dump(data, fileobj)
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129 finally:
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130 fileobj.close()
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131 cherrypy.engine.on_stop_engine_list.append(_save_data)
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132
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133 # Some global configuration; note that this could be moved into a configuration file
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134 cherrypy.config.update({
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135 'request.throw_errors': True,
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136 'tools.encode.on': True, 'tools.encode.encoding': 'utf-8',
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137 'tools.decode.on': True,
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138 'tools.trailing_slash.on': True,
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139 'tools.staticdir.root': os.path.abspath(os.path.dirname(__file__)),
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140 })
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141
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142 # Initialize the application, and add EvalException for more helpful error messages
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143 app = cherrypy.Application(Root(data))
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144 app.wsgiapp.pipeline.append(('paste_exc', EvalException))
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145 cherrypy.quickstart(app, '/', {
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146 '/media': {
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147 'tools.staticdir.on': True,
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148 'tools.staticdir.dir': 'static'
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149 }
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150 })
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151
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152 if __name__ == '__main__':
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153 import formencode
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154 formencode.api.set_stdtranslation(languages=['en'])
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155 main(sys.argv[1])
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