source: package_branches/invirt-web/cherrypy-rebased/code/view.py @ 2697

Last change on this file since 2697 was 2697, checked in by broder, 15 years ago

Remove unused external_remote_user_login function

File size: 5.4 KB
Line 
1import os, sys
2
3import cherrypy
4from mako.template import Template
5from mako.lookup import TemplateLookup
6import simplejson
7import datetime, decimal
8from StringIO import StringIO
9from invirt.config import structs as config
10from webcommon import State
11
12class MakoHandler(cherrypy.dispatch.LateParamPageHandler):
13    """Callable which sets response.body."""
14   
15    def __init__(self, template, next_handler, content_type='text/html; charset=utf-8'):
16        self.template = template
17        self.next_handler = next_handler
18        self.content_type = content_type
19   
20    def __call__(self):
21        env = globals().copy()
22        env.update(self.next_handler())
23        cherrypy.response.headers['Content-Type'] = self.content_type
24        return self.template.render(**env)
25       
26
27class MakoLoader(object):
28   
29    def __init__(self):
30        self.lookups = {}
31
32    def get_lookup(self, directories, module_directory=None,
33                     collection_size=-1, imports=[], **kwargs):
34        # Find the appropriate template lookup.
35        key = (tuple(directories), module_directory)
36        try:
37            lookup = self.lookups[key]
38        except KeyError:
39            lookup = TemplateLookup(directories=directories,
40                                    module_directory=module_directory,
41                                    collection_size=collection_size,
42                                    default_filters=['decode.utf8'],
43                                    input_encoding='utf-8',
44                                    output_encoding='utf-8',
45                                    imports=imports,
46                                    )
47            self.lookups[key] = lookup
48        return lookup
49
50    def __call__(self, filename, directories, module_directory=None,
51                 collection_size=-1, content_type='text/html; charset=utf-8',
52                 imports=[]):
53        cherrypy.request.lookup = lookup = self.get_lookup(directories, module_directory,
54                                                           collection_size, imports)
55       
56        # Replace the current handler.
57        cherrypy.request.template = t = lookup.get_template(filename)
58        cherrypy.request.handler = MakoHandler(t, cherrypy.request.handler, content_type)
59
60main = MakoLoader()
61cherrypy.tools.mako = cherrypy.Tool('on_start_resource', main)
62
63def revertStandardError():
64    """Move stderr to stdout, and return the contents of the old stderr."""
65    errio = sys.stderr
66    if not isinstance(errio, StringIO):
67        return ''
68    sys.stderr = sys.stdout
69    errio.seek(0)
70    return errio.read()
71
72def catchStderr():
73    old_handler = cherrypy.request.handler
74    def wrapper(*args, **kwargs):
75        sys.stderr = StringIO()
76        ret = old_handler(*args, **kwargs)
77        e = revertStandardError()
78        if e:
79            if isinstance(ret, dict):
80                ret["error_text"] = e
81        return ret
82    if old_handler:
83        cherrypy.request.handler = wrapper
84
85cherrypy.tools.catch_stderr = cherrypy.Tool('before_handler', catchStderr)
86
87class JSONEncoder(simplejson.JSONEncoder):
88        def default(self, obj):
89                if isinstance(obj, datetime.datetime):
90                        return str(obj)
91                elif isinstance(obj, decimal.Decimal):
92                        return float(obj)
93                else:
94                        return simplejson.JSONEncoder.default(self, obj)
95
96def jsonify_tool_callback(*args, **kwargs):
97    if not cherrypy.request.cached:
98        response = cherrypy.response
99        response.headers['Content-Type'] = 'text/javascript'
100        response.body = JSONEncoder().iterencode(response.body)
101
102cherrypy.tools.jsonify = cherrypy.Tool('before_finalize', jsonify_tool_callback, priority=30)
103
104def require_login():
105    """If the user isn't logged in, raise 403 with an error."""
106    if cherrypy.request.login is False:
107        raise cherrypy.HTTPError(403,
108            "You are not authorized to access that resource")
109
110cherrypy.tools.require_login = cherrypy.Tool('on_start_resource', require_login, priority=150)
111
112def require_POST():
113    """If the request isn't a POST request, raise 405 Method Not Allowed"""
114    if cherrypy.request.method != "POST":
115        raise cherrypy.HTTPError(405,
116                                 "You must submit this request with POST")
117
118cherrypy.tools.require_POST = cherrypy.Tool('on_start_resource', require_POST, priority=150)
119
120def remote_user_login():
121    """Get the current user based on the SSL or GSSAPI environment variables"""
122    environ = cherrypy.request.wsgi_environ
123    user = environ.get('REMOTE_USER')
124    if user is None:
125        return
126    else:
127        cherrypy.request.login = None # clear what cherrypy put there
128
129    if environ.get('AUTH_TYPE') == 'Negotiate':
130        # Convert the krb5 principal into a krb4 username
131        if not user.endswith('@%s' % config.kerberos.realm):
132            cherrypy.request.login = False # failed to login
133        else:
134            cherrypy.request.login = user.split('@')[0].replace('/', '.')
135    else:
136        cherrypy.request.login = user
137
138cherrypy.tools.remote_user_login = cherrypy.Tool('on_start_resource', remote_user_login, priority=50)
139
140def invirtwebstate_init():
141    """Initialize the cherrypy.request.state object from Invirt"""
142    if not hasattr(cherrypy.request, "state"):
143        cherrypy.request.state = State(cherrypy.request.login)
144
145cherrypy.tools.invirtwebstate = cherrypy.Tool('on_start_resource', invirtwebstate_init, priority=100)
146
147class View(object):
148    _cp_config = {'tools.mako.directories': [os.path.join(os.path.dirname(__file__),'templates')]}
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