mirror of https://github.com/zulip/zulip.git
237 lines
9.2 KiB
Python
237 lines
9.2 KiB
Python
from django.views.decorators.csrf import csrf_exempt
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from django.views.decorators.http import require_POST
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from zephyr.models import UserProfile, UserActivity, get_client
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from zephyr.lib.response import json_success, json_error
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from django.utils.timezone import now
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from django.db import transaction, IntegrityError
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from django.conf import settings
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from functools import wraps
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class _RespondAsynchronously(object):
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pass
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# Return RespondAsynchronously from an @asynchronous view if the
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# response will be provided later by calling handler.finish(), or has
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# already been provided this way. We use this for longpolling mode.
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RespondAsynchronously = _RespondAsynchronously()
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def asynchronous(method):
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@wraps(method)
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def wrapper(request, *args, **kwargs):
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return method(request, handler=request._tornado_handler, *args, **kwargs)
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if getattr(method, 'csrf_exempt', False):
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wrapper.csrf_exempt = True
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return wrapper
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# I like the all-lowercase name better
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require_post = require_POST
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@transaction.commit_on_success
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def update_user_activity(request, user_profile, client):
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current_time = now()
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try:
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(activity, created) = UserActivity.objects.get_or_create(
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user_profile = user_profile,
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client = client,
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query = request.META["PATH_INFO"],
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defaults={'last_visit': current_time, 'count': 0})
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except IntegrityError:
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transaction.commit()
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activity = UserActivity.objects.get(user_profile = user_profile,
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client = client,
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query = request.META["PATH_INFO"])
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activity.count += 1
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activity.last_visit = current_time
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activity.save()
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# authenticated_api_view will add the authenticated user's user_profile to
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# the view function's arguments list, since we have to look it up
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# anyway.
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def authenticated_api_view(view_func):
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@csrf_exempt
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@require_post
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@has_request_variables
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@wraps(view_func)
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def _wrapped_view_func(request, email=POST, api_key=POST('api-key'),
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client=POST(default=get_client("API"), converter=get_client),
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*args, **kwargs):
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try:
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user_profile = UserProfile.objects.get(user__email=email)
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except UserProfile.DoesNotExist:
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return json_error("Invalid user: %s" % (email,))
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if api_key != user_profile.api_key:
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return json_error("Invalid API key for user '%s'" % (email,))
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request._client = client
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update_user_activity(request, user_profile, client)
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return view_func(request, user_profile, *args, **kwargs)
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return _wrapped_view_func
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def authenticate_log_and_execute_json(request, client, view_func, *args, **kwargs):
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if not request.user.is_authenticated():
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return json_error("Not logged in", status=401)
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request._client = client
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user_profile = request.user.userprofile
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update_user_activity(request, user_profile, client)
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return view_func(request, user_profile, *args, **kwargs)
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# Checks if the request is a POST request and that the user is logged
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# in. If not, return an error (the @login_required behavior of
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# redirecting to a login page doesn't make sense for json views)
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def authenticated_json_post_view(view_func):
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@require_post
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@has_request_variables
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@wraps(view_func)
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def _wrapped_view_func(request,
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client=POST(default=get_client("website"), converter=get_client),
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*args, **kwargs):
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return authenticate_log_and_execute_json(request, client, view_func, *args, **kwargs)
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return _wrapped_view_func
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def authenticated_json_view(view_func):
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@wraps(view_func)
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def _wrapped_view_func(request,
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client=get_client("website"),
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*args, **kwargs):
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return authenticate_log_and_execute_json(request, client, view_func, *args, **kwargs)
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return _wrapped_view_func
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# These views are used by the main Django server to notify the Tornado server
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# of events. We protect them from the outside world by checking a shared
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# secret, and also the originating IP (for now).
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def authenticate_notify(request):
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return (request.META['REMOTE_ADDR'] in ('127.0.0.1', '::1')
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and request.POST.get('secret') == settings.SHARED_SECRET)
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def internal_notify_view(view_func):
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@csrf_exempt
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@require_post
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@wraps(view_func)
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def _wrapped_view_func(request, *args, **kwargs):
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if not authenticate_notify(request):
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return json_error('Access denied', status=403)
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if not hasattr(request, '_tornado_handler'):
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# We got called through the non-Tornado server somehow.
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# This is not a security check; it's an internal assertion
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# to help us find bugs.
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raise RuntimeError, 'notify view called with no Tornado handler'
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return view_func(request, *args, **kwargs)
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return _wrapped_view_func
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class RequestVariableMissingError(Exception):
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def __init__(self, var_name):
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self.var_name = var_name
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def to_json_error_msg(self):
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return "Missing '%s' argument" % (self.var_name,)
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def __str__(self):
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return self.to_json_error_msg()
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class RequestVariableConversionError(Exception):
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def __init__(self, var_name, bad_value):
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self.var_name = var_name
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self.bad_value = bad_value
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def to_json_error_msg(self):
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return "Bad value for '%s': %s" % (self.var_name, self.bad_value)
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def __str__(self):
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return self.to_json_error_msg()
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# Used in conjunction with @has_request_variables, below
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class POST(object):
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# NotSpecified is a sentinel value for determining whether a
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# default value was specified for a request variable. We can't
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# use None because that could be a valid, user-specified default
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class _NotSpecified(object):
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pass
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NotSpecified = _NotSpecified()
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def __init__(self, whence=None, converter=None, default=NotSpecified):
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"""
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whence: the name of the request variable that should be used
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for this parameter. Defaults to a request variable of the
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same name as the parameter.
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converter: a function that takes a string and returns a new
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value. If specified, this will be called on the request
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variable value before passing to the function
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default: a value to be used for the argument if the parameter
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is missing in the request
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"""
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self.post_var_name = whence
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self.func_var_name = None
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self.converter = converter
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self.default = default
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# Extracts variables from the request object and passes them as
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# named function arguments. The request object must be the first
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# argument to the function.
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#
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# To use, assign a function parameter a default value that is an
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# instance of the POST class. That paramter will then be
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# automatically populated from the HTTP request. The request object
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# must be the first argument to the decorated function.
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#
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# This should generally be the innermost (syntactically bottommost)
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# decorator applied to a view, since other decorators won't preserve
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# the default parameter values used by has_request_variables.
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#
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# Note that this can't be used in helper functions which are not
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# expected to call json_error or json_success, as it uses json_error
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# internally when it encounters an error
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def has_request_variables(view_func):
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num_params = view_func.func_code.co_argcount
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if view_func.func_defaults is None:
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num_default_params = 0
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else:
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num_default_params = len(view_func.func_defaults)
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default_param_names = view_func.func_code.co_varnames[num_params - num_default_params:]
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default_param_values = view_func.func_defaults
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post_params = []
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for (name, value) in zip(default_param_names, default_param_values):
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if isinstance(value, POST):
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value.func_var_name = name
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if value.post_var_name is None:
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value.post_var_name = name
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post_params.append(value)
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elif value == POST:
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# If the function definition does not actually
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# instantiate a POST object but instead uses the POST
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# class itself as a value, we instantiate it as a
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# convenience
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post_var = POST(name)
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post_var.func_var_name = name
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post_params.append(post_var)
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@wraps(view_func)
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def _wrapped_view_func(request, *args, **kwargs):
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for param in post_params:
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if param.func_var_name in kwargs:
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continue
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default_assigned = False
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try:
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val = request.POST[param.post_var_name]
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except KeyError:
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if param.default is POST.NotSpecified:
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raise RequestVariableMissingError(param.post_var_name)
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val = param.default
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default_assigned = True
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if param.converter is not None and not default_assigned:
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try:
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val = param.converter(val)
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except:
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raise RequestVariableConversionError(param.post_var_name, val)
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kwargs[param.func_var_name] = val
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return view_func(request, *args, **kwargs)
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return _wrapped_view_func
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