X-Git-Url: http://xvm.mit.edu/gitweb/invirt/packages/invirt-web.git/blobdiff_plain/701fd288f46b5ed9d60c3c5c1f71f22be3bec76d..d7b8e921bc3e91f5dde078f9a97a2089945ce183:/code/view.py?ds=sidebyside diff --git a/code/view.py b/code/view.py index a375a9e..51f19a5 100644 --- a/code/view.py +++ b/code/view.py @@ -1,15 +1,21 @@ -import os +import os, sys import cherrypy from mako.template import Template from mako.lookup import TemplateLookup import simplejson import datetime, decimal +from StringIO import StringIO +from invirt.config import structs as config +import invirt.database +from webcommon import State + class MakoHandler(cherrypy.dispatch.LateParamPageHandler): - """Callable which sets response.body.""" + """Callable which processes a dictionary, returning the rendered body.""" - def __init__(self, template, next_handler, content_type='text/html; charset=utf-8'): + def __init__(self, template, next_handler, + content_type='text/html; charset=utf-8'): self.template = template self.next_handler = next_handler self.content_type = content_type @@ -25,9 +31,9 @@ class MakoLoader(object): def __init__(self): self.lookups = {} - - def __call__(self, filename, directories, module_directory=None, - collection_size=-1, content_type='text/html; charset=utf-8'): + + def get_lookup(self, directories, module_directory=None, + collection_size=-1, imports=[], **kwargs): # Find the appropriate template lookup. key = (tuple(directories), module_directory) try: @@ -39,16 +45,48 @@ class MakoLoader(object): default_filters=['decode.utf8'], input_encoding='utf-8', output_encoding='utf-8', + imports=imports, ) self.lookups[key] = lookup - cherrypy.request.lookup = lookup - - # Replace the current handler. + return lookup + + def __call__(self, filename, directories, module_directory=None, + collection_size=-1, content_type='text/html; charset=utf-8', + imports=[]): + cherrypy.request.lookup = lookup = self.get_lookup( + directories, module_directory, collection_size, imports) cherrypy.request.template = t = lookup.get_template(filename) - cherrypy.request.handler = MakoHandler(t, cherrypy.request.handler, content_type) + cherrypy.request.handler = MakoHandler( + t, cherrypy.request.handler, content_type) + +cherrypy.tools.mako = cherrypy.Tool('on_start_resource', MakoLoader()) + + +def revertStandardError(): + """Move stderr to stdout, and return the contents of the old stderr.""" + errio = sys.stderr + if not isinstance(errio, StringIO): + return '' + sys.stderr = sys.stdout + errio.seek(0) + return errio.read() + + +def catchStderr(): + old_handler = cherrypy.request.handler + def wrapper(*args, **kwargs): + sys.stderr = StringIO() + ret = old_handler(*args, **kwargs) + e = revertStandardError() + if e: + if isinstance(ret, dict): + ret["error_text"] = e + return ret + if old_handler: + cherrypy.request.handler = wrapper + +cherrypy.tools.catch_stderr = cherrypy.Tool('before_handler', catchStderr) -main = MakoLoader() -cherrypy.tools.mako = cherrypy.Tool('on_start_resource', main) class JSONEncoder(simplejson.JSONEncoder): def default(self, obj): @@ -59,13 +97,78 @@ class JSONEncoder(simplejson.JSONEncoder): else: return simplejson.JSONEncoder.default(self, obj) + def jsonify_tool_callback(*args, **kwargs): if not cherrypy.request.cached: response = cherrypy.response response.headers['Content-Type'] = 'text/javascript' response.body = JSONEncoder().iterencode(response.body) -cherrypy.tools.jsonify = cherrypy.Tool('before_finalize', jsonify_tool_callback, priority=30) +cherrypy.tools.jsonify = cherrypy.Tool('before_finalize', + jsonify_tool_callback, priority=30) + + +def require_login(): + """If the user isn't logged in, raise 403 with an error.""" + if cherrypy.request.login is False: + raise cherrypy.HTTPError(403, + "You are not authorized to access that resource") + +cherrypy.tools.require_login = cherrypy.Tool('on_start_resource', + require_login, priority=150) + + +def require_POST(): + """If the request isn't a POST request, raise 405 Method Not Allowed""" + if cherrypy.request.method != "POST": + raise cherrypy.HTTPError(405, + "You must submit this request with POST") + if not cherrypy.request.headers.get('Referer', '').startswith('https://' + config.web.hostname): + raise cherrypy.HTTPError(403, "This form is only usable when submitted from another page on this site. If you receive this message in error, check your browser's Referer settings.") + +cherrypy.tools.require_POST = cherrypy.Tool('on_start_resource', + require_POST, priority=150) + + +def remote_user_login(): + """Get remote user from SSL or GSSAPI, and store in request object. + +Get the current user based on environment variables set by SSL or +GSSAPI, and store it in the attribute cherrpy.request.login. + +Per the CherryPy API (http://www.cherrypy.org/wiki/RequestObject#login), +the attribute is set to the username on successful login, to False on +failed login, and is left at None if the user attempted no authentication. +""" + environ = cherrypy.request.wsgi_environ + user = environ.get('REMOTE_USER') + if user is None: + return + if environ.get('AUTH_TYPE') == 'Negotiate': + # Convert the krb5 principal into a krb4 username + if not user.endswith('@%s' % config.kerberos.realm): + cherrypy.request.login = False # failed to log in + else: + cherrypy.request.login = user.split('@')[0].replace('/', '.') + else: + cherrypy.request.login = user + +cherrypy.tools.remote_user_login = cherrypy.Tool('on_start_resource', + remote_user_login, priority=50) + + +def invirtwebstate_init(): + """Initialize the cherrypy.request.state object from Invirt""" + if not hasattr(cherrypy.request, "state"): + cherrypy.request.state = State(cherrypy.request.login) + +cherrypy.tools.invirtwebstate = cherrypy.Tool('on_start_resource', + invirtwebstate_init, priority=100) + + +cherrypy.tools.clear_db_cache = cherrypy.Tool('on_start_resource', invirt.database.clear_cache) + class View(object): - _cp_config = {'tools.mako.directories': [os.path.join(os.path.dirname(__file__),'templates')]} + _cp_config = {'tools.mako.directories': + [os.path.join(os.path.dirname(__file__),'templates')]}