Imported from SVN by Bitbucket

2015-03-31 20:26:20 +00:00
commit ceb7984dec
212 changed files with 49537 additions and 0 deletions
--- a/Paste-1.7.5.1-py2.6.egg/paste/auth/form.py
+++ b/Paste-1.7.5.1-py2.6.egg/paste/auth/form.py
@@ -0,0 +1,149 @@
+# (c) 2005 Clark C. Evans
+# This module is part of the Python Paste Project and is released under
+# the MIT License: http://www.opensource.org/licenses/mit-license.php
+# This code was written with funding by http://prometheusresearch.com
+"""
+Authentication via HTML Form
+
+This is a very simple HTML form login screen that asks for the username
+and password.  This middleware component requires that an authorization
+function taking the name and passsword and that it be placed in your
+application stack. This class does not include any session management
+code or way to save the user's authorization; however, it is easy enough
+to put ``paste.auth.cookie`` in your application stack.
+
+>>> from paste.wsgilib import dump_environ
+>>> from paste.httpserver import serve
+>>> from paste.auth.cookie import AuthCookieHandler
+>>> from paste.auth.form import AuthFormHandler
+>>> def authfunc(environ, username, password):
+...    return username == password
+>>> serve(AuthCookieHandler(
+...           AuthFormHandler(dump_environ, authfunc)))
+serving on...
+
+"""
+from paste.request import construct_url, parse_formvars
+
+TEMPLATE = """\
+<html>
+  <head><title>Please Login!</title></head>
+  <body>
+    <h1>Please Login</h1>
+    <form action="%s" method="post">
+      <dl>
+        <dt>Username:</dt>
+        <dd><input type="text" name="username"></dd>
+        <dt>Password:</dt>
+        <dd><input type="password" name="password"></dd>
+      </dl>
+      <input type="submit" name="authform" />
+      <hr />
+    </form>
+  </body>
+</html>
+"""
+
+class AuthFormHandler(object):
+    """
+    HTML-based login middleware
+
+    This causes a HTML form to be returned if ``REMOTE_USER`` is
+    not found in the ``environ``.  If the form is returned, the
+    ``username`` and ``password`` combination are given to a
+    user-supplied authentication function, ``authfunc``.  If this
+    is successful, then application processing continues.
+
+    Parameters:
+
+        ``application``
+
+            The application object is called only upon successful
+            authentication, and can assume ``environ['REMOTE_USER']``
+            is set.  If the ``REMOTE_USER`` is already set, this
+            middleware is simply pass-through.
+
+        ``authfunc``
+
+            This is a mandatory user-defined function which takes a
+            ``environ``, ``username`` and ``password`` for its first
+            three arguments.  It should return ``True`` if the user is
+            authenticated.
+
+        ``template``
+
+            This is an optional (a default is provided) HTML
+            fragment that takes exactly one ``%s`` substution
+            argument; which *must* be used for the form's ``action``
+            to ensure that this middleware component does not alter
+            the current path.  The HTML form must use ``POST`` and
+            have two input names:  ``username`` and ``password``.
+
+    Since the authentication form is submitted (via ``POST``)
+    neither the ``PATH_INFO`` nor the ``QUERY_STRING`` are accessed,
+    and hence the current path remains _unaltered_ through the
+    entire authentication process. If authentication succeeds, the
+    ``REQUEST_METHOD`` is converted from a ``POST`` to a ``GET``,
+    so that a redirect is unnecessary (unlike most form auth
+    implementations)
+    """
+
+    def __init__(self, application, authfunc, template=None):
+        self.application = application
+        self.authfunc = authfunc
+        self.template = template or TEMPLATE
+
+    def __call__(self, environ, start_response):
+        username = environ.get('REMOTE_USER','')
+        if username:
+            return self.application(environ, start_response)
+
+        if 'POST' == environ['REQUEST_METHOD']:
+            formvars = parse_formvars(environ, include_get_vars=False)
+            username = formvars.get('username')
+            password = formvars.get('password')
+            if username and password:
+                if self.authfunc(environ, username, password):
+                    environ['AUTH_TYPE'] = 'form'
+                    environ['REMOTE_USER'] = username
+                    environ['REQUEST_METHOD'] = 'GET'
+                    environ['CONTENT_LENGTH'] = ''
+                    environ['CONTENT_TYPE'] = ''
+                    del environ['paste.parsed_formvars']
+                    return self.application(environ, start_response)
+
+        content = self.template % construct_url(environ)
+        start_response("200 OK", [('Content-Type', 'text/html'),
+                                  ('Content-Length', str(len(content)))])
+        return [content]
+
+middleware = AuthFormHandler
+
+__all__ = ['AuthFormHandler']
+
+def make_form(app, global_conf, realm, authfunc, **kw):
+    """
+    Grant access via form authentication
+
+    Config looks like this::
+
+      [filter:grant]
+      use = egg:Paste#auth_form
+      realm=myrealm
+      authfunc=somepackage.somemodule:somefunction
+      
+    """
+    from paste.util.import_string import eval_import
+    import types
+    authfunc = eval_import(authfunc)
+    assert isinstance(authfunc, types.FunctionType), "authfunc must resolve to a function"
+    template = kw.get('template')
+    if template is not None:
+        template = eval_import(template)
+        assert isinstance(template, str), "template must resolve to a string"
+
+    return AuthFormHandler(app, authfunc, template)
+
+if "__main__" == __name__:
+    import doctest
+    doctest.testmod(optionflags=doctest.ELLIPSIS)