| author | Pawel Solyga <Pawel.Solyga@gmail.com> |
| Fri, 19 Jun 2009 16:13:32 +0200 | |
| changeset 2413 | d0b7dac5325c |
| parent 2273 | e4cb9c53db3e |
| permissions | -rwxr-xr-x |
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#!/usr/bin/env python |
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# |
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# Copyright 2007 Google Inc. |
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# |
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# Licensed under the Apache License, Version 2.0 (the "License"); |
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# you may not use this file except in compliance with the License. |
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# You may obtain a copy of the License at |
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# |
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# http://www.apache.org/licenses/LICENSE-2.0 |
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# |
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# Unless required by applicable law or agreed to in writing, software |
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# distributed under the License is distributed on an "AS IS" BASIS, |
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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# See the License for the specific language governing permissions and |
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# limitations under the License. |
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# |
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"""Helper CGI for logins/logout in the development application server. |
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This CGI has these parameters: |
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continue: URL to redirect to after a login or logout has completed. |
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email: Email address to set for the client. |
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admin: If 'True', the client should be logged in as an admin. |
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action: What action to take ('Login' or 'Logout').
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To view the current user information and a form for logging in and out, |
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supply no parameters. |
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""" |
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import cgi |
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import Cookie |
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import md5 |
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import os |
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import sys |
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import urllib |
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CONTINUE_PARAM = 'continue' |
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EMAIL_PARAM = 'email' |
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ADMIN_PARAM = 'admin' |
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ACTION_PARAM = 'action' |
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LOGOUT_ACTION = 'Logout' |
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LOGIN_ACTION = 'Login' |
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LOGOUT_PARAM = 'action=%s' % LOGOUT_ACTION |
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COOKIE_NAME = 'dev_appserver_login' |
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def GetUserInfo(http_cookie, cookie_name=COOKIE_NAME): |
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"""Get the requestor's user info from the HTTP cookie in the CGI environment. |
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Args: |
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http_cookie: Value of the HTTP_COOKIE environment variable. |
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cookie_name: Name of the cookie that stores the user info. |
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Returns: |
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Tuple (email, admin) where: |
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email: The user's email address, if any. |
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admin: True if the user is an admin; False otherwise. |
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""" |
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cookie = Cookie.SimpleCookie(http_cookie) |
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cookie_value = '' |
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if cookie_name in cookie: |
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cookie_value = cookie[cookie_name].value |
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email, admin, user_id = (cookie_value.split(':') + ['', '', ''])[:3]
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return email, (admin == 'True'), user_id |
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def CreateCookieData(email, admin): |
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"""Creates cookie payload data. |
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Args: |
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email, admin: Parameters to incorporate into the cookie. |
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Returns: |
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String containing the cookie payload. |
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""" |
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admin_string = 'False' |
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if admin: |
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admin_string = 'True' |
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if email: |
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user_id_digest = md5.new(email.lower()).digest() |
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user_id = '1' + ''.join(['%02d' % ord(x) for x in user_id_digest])[:20] |
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else: |
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user_id = '' |
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return '%s:%s:%s' % (email, admin_string, user_id) |
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def SetUserInfoCookie(email, admin, cookie_name=COOKIE_NAME): |
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"""Creates a cookie to set the user information for the requestor. |
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Args: |
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email: Email to set for the user. |
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admin: True if the user should be admin; False otherwise. |
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cookie_name: Name of the cookie that stores the user info. |
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Returns: |
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'Set-Cookie' header for setting the user info of the requestor. |
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""" |
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cookie_value = CreateCookieData(email, admin) |
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set_cookie = Cookie.SimpleCookie() |
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set_cookie[cookie_name] = cookie_value |
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|
108 |
set_cookie[cookie_name]['path'] = '/' |
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|
109 |
return '%s\r\n' % set_cookie |
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|
110 |
|
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|
111 |
|
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|
112 |
def ClearUserInfoCookie(cookie_name=COOKIE_NAME): |
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|
113 |
"""Clears the user info cookie from the requestor, logging them out. |
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|
114 |
|
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|
115 |
Args: |
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|
116 |
cookie_name: Name of the cookie that stores the user info. |
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|
117 |
|
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|
118 |
Returns: |
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|
119 |
'Set-Cookie' header for clearing the user info of the requestor. |
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120 |
""" |
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|
121 |
set_cookie = Cookie.SimpleCookie() |
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|
122 |
set_cookie[cookie_name] = '' |
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|
123 |
set_cookie[cookie_name]['path'] = '/' |
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|
124 |
set_cookie[cookie_name]['max-age'] = '0' |
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|
125 |
return '%s\r\n' % set_cookie |
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|
126 |
|
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127 |
|
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|
128 |
LOGIN_TEMPLATE = """<html> |
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|
129 |
<head> |
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130 |
<title>Login</title> |
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|
131 |
</head> |
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|
132 |
<body> |
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|
133 |
|
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|
134 |
<form method='get' action='%(login_url)s' |
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|
135 |
style='text-align:center; font: 13px sans-serif'> |
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|
136 |
<div style='width: 20em; margin: 1em auto; |
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|
137 |
text-align:left; |
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|
138 |
padding: 0 2em 1.25em 2em; |
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|
139 |
background-color: #d6e9f8; |
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|
140 |
border: 2px solid #67a7e3'> |
|
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|
141 |
<h3>%(login_message)s</h3> |
|
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|
142 |
<p style='padding: 0; margin: 0'> |
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|
143 |
<label for='email' style="width: 3em">Email:</label> |
|
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|
144 |
<input name='email' type='text' value='%(email)s' id='email'/> |
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|
145 |
</p> |
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|
146 |
<p style='margin: .5em 0 0 3em; font-size:12px'> |
|
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|
147 |
<input name='admin' type='checkbox' value='True' |
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|
148 |
%(admin_checked)s id='admin'/> |
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|
149 |
<label for='admin'>Sign in as Administrator</label> |
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|
150 |
</p> |
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|
151 |
<p style='margin-left: 3em'> |
|
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|
152 |
<input name='action' value='Login' type='submit' |
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|
153 |
id='submit-login' /> |
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|
154 |
<input name='action' value='Logout' type='submit' |
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|
155 |
id='submit-logout' /> |
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|
156 |
</p> |
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|
157 |
</div> |
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|
158 |
<input name='continue' type='hidden' value='%(continue_url)s'/> |
|
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|
159 |
</form> |
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|
160 |
|
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|
161 |
</body> |
|
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|
162 |
</html> |
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|
163 |
""" |
|
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|
164 |
|
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|
165 |
|
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|
166 |
def RenderLoginTemplate(login_url, continue_url, email, admin): |
|
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|
167 |
"""Renders the login page. |
|
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|
168 |
|
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|
169 |
Args: |
|
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|
170 |
login_url, continue_url, email, admin: Parameters passed to |
|
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parents:
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|
171 |
LoginCGI. |
|
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parents:
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|
172 |
|
|
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|
173 |
Returns: |
|
620f9b141567
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parents:
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|
174 |
String containing the contents of the login page. |
|
620f9b141567
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parents:
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|
175 |
""" |
|
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|
176 |
login_message = 'Not logged in' |
|
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parents:
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|
177 |
if email: |
|
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Load ../../google_appengine into trunk/thirdparty/google_appengine.
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parents:
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|
178 |
login_message = 'Logged in' |
|
620f9b141567
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|
179 |
admin_checked = '' |
|
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|
180 |
if admin: |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
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parents:
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|
181 |
admin_checked = 'checked' |
|
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|
182 |
|
|
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parents:
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|
183 |
template_dict = {
|
|
620f9b141567
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parents:
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changeset
|
184 |
|
|
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parents:
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changeset
|
185 |
|
|
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parents:
diff
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|
186 |
'email': email or 'test\x40example.com', |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
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parents:
diff
changeset
|
187 |
'admin_checked': admin_checked, |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
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parents:
diff
changeset
|
188 |
'login_message': login_message, |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
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parents:
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|
189 |
'login_url': login_url, |
|
620f9b141567
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parents:
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|
190 |
'continue_url': continue_url |
|
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parents:
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|
191 |
} |
|
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Load ../../google_appengine into trunk/thirdparty/google_appengine.
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parents:
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changeset
|
192 |
|
|
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parents:
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changeset
|
193 |
return LOGIN_TEMPLATE % template_dict |
|
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parents:
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changeset
|
194 |
|
|
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parents:
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changeset
|
195 |
|
|
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parents:
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|
196 |
def LoginRedirect(login_url, |
|
620f9b141567
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parents:
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|
197 |
hostname, |
|
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Load ../../google_appengine into trunk/thirdparty/google_appengine.
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parents:
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|
198 |
port, |
|
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Load ../../google_appengine into trunk/thirdparty/google_appengine.
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parents:
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|
199 |
relative_url, |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
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parents:
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changeset
|
200 |
outfile): |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
201 |
"""Writes a login redirection URL to a user. |
|
620f9b141567
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parents:
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changeset
|
202 |
|
|
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|
203 |
Args: |
|
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parents:
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changeset
|
204 |
login_url: Relative URL which should be used for handling user logins. |
|
620f9b141567
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Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
205 |
hostname: Name of the host on which the webserver is running. |
|
620f9b141567
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Todd Larsen <tlarsen@google.com>
parents:
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changeset
|
206 |
port: Port on which the webserver is running. |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
207 |
relative_url: String containing the URL accessed. |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
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parents:
diff
changeset
|
208 |
outfile: File-like object to which the response should be written. |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
209 |
""" |
|
620f9b141567
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parents:
diff
changeset
|
210 |
dest_url = "http://%s:%s%s" % (hostname, port, relative_url) |
|
620f9b141567
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Todd Larsen <tlarsen@google.com>
parents:
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changeset
|
211 |
redirect_url = 'http://%s:%s%s?%s=%s' % (hostname, |
|
620f9b141567
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parents:
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changeset
|
212 |
port, |
|
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parents:
diff
changeset
|
213 |
login_url, |
|
620f9b141567
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parents:
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changeset
|
214 |
CONTINUE_PARAM, |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
215 |
urllib.quote(dest_url)) |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
216 |
outfile.write('Status: 302 Requires login\r\n')
|
|
620f9b141567
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outfile.write('Location: %s\r\n\r\n' % redirect_url)
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def LoginCGI(login_url, |
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email, |
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admin, |
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action, |
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set_email, |
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set_admin, |
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continue_url, |
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outfile): |
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"""Runs the login CGI. |
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This CGI does not care about the method at all. For both POST and GET the |
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client will be redirected to the continue URL. |
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232 |
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Args: |
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login_url: URL used to run the CGI. |
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email: Current email address of the requesting user. |
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admin: True if the requesting user is an admin; False otherwise. |
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action: The action used to run the CGI; 'Login' for a login action, 'Logout' |
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for when a logout should occur. |
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set_email: Email to set for the user; Empty if no email should be set. |
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set_admin: True if the user should be an admin; False otherwise. |
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continue_url: URL to which the user should be redirected when the CGI |
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finishes loading; defaults to the login_url with no parameters (showing |
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current status) if not supplied. |
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outfile: File-like object to which all output data should be written. |
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""" |
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redirect_url = '' |
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output_headers = [] |
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248 |
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if action: |
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if action.lower() == LOGOUT_ACTION.lower(): |
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output_headers.append(ClearUserInfoCookie()) |
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elif set_email: |
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output_headers.append(SetUserInfoCookie(set_email, set_admin)) |
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254 |
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redirect_url = continue_url or login_url |
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256 |
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if redirect_url: |
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outfile.write('Status: 302 Redirecting to continue URL\r\n')
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for header in output_headers: |
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outfile.write(header) |
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outfile.write('Location: %s\r\n' % redirect_url)
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outfile.write('\r\n')
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else: |
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outfile.write('Status: 200\r\n')
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outfile.write('Content-Type: text/html\r\n')
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outfile.write('\r\n')
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outfile.write(RenderLoginTemplate(login_url, |
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continue_url, |
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email, |
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270 |
admin)) |
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271 |
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272 |
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def main(): |
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"""Runs the login and logout CGI script.""" |
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form = cgi.FieldStorage() |
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login_url = os.environ['PATH_INFO'] |
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email = os.environ.get('USER_EMAIL', '')
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admin = os.environ.get('USER_IS_ADMIN', '0') == '1'
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279 |
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action = form.getfirst(ACTION_PARAM) |
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set_email = form.getfirst(EMAIL_PARAM, '') |
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set_admin = form.getfirst(ADMIN_PARAM, '') == 'True' |
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continue_url = form.getfirst(CONTINUE_PARAM, '') |
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284 |
|
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LoginCGI(login_url, |
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286 |
email, |
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287 |
admin, |
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action, |
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set_email, |
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290 |
set_admin, |
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continue_url, |
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292 |
sys.stdout) |
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293 |
return 0 |
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294 |
|
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295 |
|
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if __name__ == '__main__': |
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main() |