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annotate examples/tutorial/geddit/controller.py @ 625:abad7c2ebe15 trunk

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GenshiTutorial: implemented AJAX commenting.
author cmlenz
date Fri, 31 Aug 2007 17:01:00 +0000
parents 6780f1b1b20d
children 3ed77fbfafa8
rev   line source
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1 #!/usr/bin/env python
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2
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3 import operator
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4 import os
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5 import pickle
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6 import sys
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7
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8 import cherrypy
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9 from formencode import Invalid
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10 from genshi.filters import HTMLFormFiller
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11
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12 from geddit.form import LinkForm, CommentForm
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13 from geddit.lib import ajax, template
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14 from geddit.model import Link, 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
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22 @cherrypy.expose
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23 @template.output('index.xml', method='xml')
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24 def feed(self, id=None):
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25 if id:
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26 link = self.data.get(id)
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27 if not link:
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28 raise cherrypy.NotFound()
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29 return template.render('info.xml', link=link)
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30 else:
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31 links = sorted(self.data.values(), key=operator.attrgetter('time'))
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32 return template.render(links=links)
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33
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34 @cherrypy.expose
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35 @template.output('index.html')
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36 def index(self):
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37 links = sorted(self.data.values(), key=operator.attrgetter('time'))
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38 return template.render(links=links)
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39
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40 @cherrypy.expose
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41 @template.output('info.html')
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42 def info(self, id):
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43 link = self.data.get(id)
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44 if not link:
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45 raise cherrypy.NotFound()
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46 return template.render(link=link)
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47
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48 @cherrypy.expose
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49 @template.output('submit.html')
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50 def submit(self, cancel=False, **data):
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51 if cherrypy.request.method == 'POST':
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52 if cancel:
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53 raise cherrypy.HTTPRedirect('/')
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54 form = LinkForm()
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55 try:
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56 data = form.to_python(data)
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57 link = Link(**data)
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58 self.data[link.id] = link
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59 raise cherrypy.HTTPRedirect('/')
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60 except Invalid, e:
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61 errors = e.unpack_errors()
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62 else:
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63 errors = {}
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64
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65 return template.render(errors=errors) | HTMLFormFiller(data=data)
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66
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67 @cherrypy.expose
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68 @template.output('comment.html')
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69 def comment(self, id, cancel=False, **data):
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70 link = self.data.get(id)
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71 if not link:
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72 raise cherrypy.NotFound()
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73 if cherrypy.request.method == 'POST':
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74 if cancel:
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75 raise cherrypy.HTTPRedirect('/info/%s' % link.id)
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76 form = CommentForm()
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77 try:
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78 data = form.to_python(data)
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79 comment = link.add_comment(**data)
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80 if not ajax.is_xhr():
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81 raise cherrypy.HTTPRedirect('/info/%s' % link.id)
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82 return template.render('_comment.html', comment=comment,
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83 num=len(link.comments))
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84 except Invalid, e:
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85 errors = e.unpack_errors()
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86 else:
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87 errors = {}
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88
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89 if ajax.is_xhr():
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90 stream = template.render('_form.html', link=link, errors=errors)
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91 else:
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92 stream = template.render(link=link, comment=None, errors=errors)
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93 return stream | HTMLFormFiller(data=data)
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94
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95
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96 def main(filename):
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97 # load data from the pickle file, or initialize it to an empty list
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98 if os.path.exists(filename):
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99 fileobj = open(filename, 'rb')
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100 try:
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101 data = pickle.load(fileobj)
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102 finally:
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103 fileobj.close()
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104 else:
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105 data = {}
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106
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107 def _save_data():
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108 # save data back to the pickle file
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109 fileobj = open(filename, 'wb')
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110 try:
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111 pickle.dump(data, fileobj)
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112 finally:
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113 fileobj.close()
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114 cherrypy.engine.on_stop_engine_list.append(_save_data)
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115
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116 # Some global configuration; note that this could be moved into a
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117 # configuration file
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118 cherrypy.config.update({
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119 'request.throw_errors': True,
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120 'tools.encode.on': True, 'tools.encode.encoding': 'utf-8',
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121 'tools.decode.on': True,
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122 'tools.trailing_slash.on': True,
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123 'tools.staticdir.root': os.path.abspath(os.path.dirname(__file__)),
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124 })
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125
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126 cherrypy.quickstart(Root(data), '/', {
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127 '/media': {
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128 'tools.staticdir.on': True,
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129 'tools.staticdir.dir': 'static'
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130 }
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131 })
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132
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133 if __name__ == '__main__':
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134 import formencode
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135 formencode.api.set_stdtranslation(languages=['en'])
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136 main(sys.argv[1])
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