import optparse import sys import textwrap from pyramid.interfaces import IMultiView from pyramid.paster import bootstrap from pyramid.request import Request from pyramid.scripts.common import parse_vars def main(argv=sys.argv, quiet=False): command = PViewsCommand(argv, quiet) return command.run() class PViewsCommand(object): usage = '%prog config_uri url' description = """\ Print, for a given URL, the views that might match. Underneath each potentially matching route, list the predicates required. Underneath each route+predicate set, print each view that might match and its predicates. This command accepts two positional arguments: 'config_uri' specifies the PasteDeploy config file to use for the interactive shell. The format is 'inifile#name'. If the name is left off, 'main' will be assumed. 'url' specifies the path info portion of a URL that will be used to find matching views. Example: 'proutes myapp.ini#main /url' """ stdout = sys.stdout parser = optparse.OptionParser( usage, description=textwrap.dedent(description) ) bootstrap = (bootstrap,) # testing def __init__(self, argv, quiet=False): self.quiet = quiet self.options, self.args = self.parser.parse_args(argv[1:]) def out(self, msg): # pragma: no cover if not self.quiet: print(msg) def _find_multi_routes(self, mapper, request): infos = [] path = request.environ['PATH_INFO'] # find all routes that match path, regardless of predicates for route in mapper.get_routes(): match = route.match(path) if match is not None: info = {'match':match, 'route':route} infos.append(info) return infos def _find_view(self, request): """ Accept ``url`` and ``registry``; create a :term:`request` and find a :app:`Pyramid` view based on introspection of :term:`view configuration` within the application registry; return the view. """ from zope.interface import providedBy from zope.interface import implementer from pyramid.interfaces import IRequest from pyramid.interfaces import IRootFactory from pyramid.interfaces import IRouteRequest from pyramid.interfaces import IRoutesMapper from pyramid.interfaces import IView from pyramid.interfaces import IViewClassifier from pyramid.interfaces import ITraverser from pyramid.traversal import DefaultRootFactory from pyramid.traversal import ResourceTreeTraverser registry = request.registry q = registry.queryUtility root_factory = q(IRootFactory, default=DefaultRootFactory) routes_mapper = q(IRoutesMapper) adapters = registry.adapters @implementer(IMultiView) class RoutesMultiView(object): def __init__(self, infos, context_iface, root_factory, request): self.views = [] for info in infos: match, route = info['match'], info['route'] if route is not None: request_iface = registry.queryUtility( IRouteRequest, name=route.name, default=IRequest) view = adapters.lookup( (IViewClassifier, request_iface, context_iface), IView, name='', default=None) if view is None: continue view.__request_attrs__ = {} view.__request_attrs__['matchdict'] = match view.__request_attrs__['matched_route'] = route root_factory = route.factory or root_factory root = root_factory(request) traverser = adapters.queryAdapter(root, ITraverser) if traverser is None: traverser = ResourceTreeTraverser(root) tdict = traverser(request) view.__request_attrs__.update(tdict) if not hasattr(view, '__view_attr__'): view.__view_attr__ = '' self.views.append((None, view, None)) context = None routes_multiview = None attrs = request.__dict__ request_iface = IRequest # find the root object if routes_mapper is not None: infos = self._find_multi_routes(routes_mapper, request) if len(infos) == 1: info = infos[0] match, route = info['match'], info['route'] if route is not None: attrs['matchdict'] = match attrs['matched_route'] = route request.environ['bfg.routes.matchdict'] = match request_iface = registry.queryUtility( IRouteRequest, name=route.name, default=IRequest) root_factory = route.factory or root_factory if len(infos) > 1: routes_multiview = infos root = root_factory(request) attrs['root'] = root # find a context traverser = adapters.queryAdapter(root, ITraverser) if traverser is None: traverser = ResourceTreeTraverser(root) tdict = traverser(request) context, view_name, subpath, traversed, vroot, vroot_path =( tdict['context'], tdict['view_name'], tdict['subpath'], tdict['traversed'], tdict['virtual_root'], tdict['virtual_root_path']) attrs.update(tdict) # find a view callable context_iface = providedBy(context) if routes_multiview is None: view = adapters.lookup( (IViewClassifier, request_iface, context_iface), IView, name=view_name, default=None) else: view = RoutesMultiView(infos, context_iface, root_factory, request) # routes are not registered with a view name if view is None: view = adapters.lookup( (IViewClassifier, request_iface, context_iface), IView, name='', default=None) # we don't want a multiview here if IMultiView.providedBy(view): view = None if view is not None: view.__request_attrs__ = attrs return view def output_route_attrs(self, attrs, indent): route = attrs['matched_route'] self.out("%sroute name: %s" % (indent, route.name)) self.out("%sroute pattern: %s" % (indent, route.pattern)) self.out("%sroute path: %s" % (indent, route.path)) self.out("%ssubpath: %s" % (indent, '/'.join(attrs['subpath']))) predicates = ', '.join([p.text() for p in route.predicates]) if predicates != '': self.out("%sroute predicates (%s)" % (indent, predicates)) def output_view_info(self, view_wrapper, level=1): indent = " " * level name = getattr(view_wrapper, '__name__', '') module = getattr(view_wrapper, '__module__', '') attr = getattr(view_wrapper, '__view_attr__', None) request_attrs = getattr(view_wrapper, '__request_attrs__', {}) if attr is not None: view_callable = "%s.%s.%s" % (module, name, attr) else: attr = view_wrapper.__class__.__name__ if attr == 'function': attr = name view_callable = "%s.%s" % (module, attr) self.out('') if 'matched_route' in request_attrs: self.out("%sRoute:" % indent) self.out("%s------" % indent) self.output_route_attrs(request_attrs, indent) permission = getattr(view_wrapper, '__permission__', None) if not IMultiView.providedBy(view_wrapper): # single view for this route, so repeat call without route data del request_attrs['matched_route'] self.output_view_info(view_wrapper, level+1) else: self.out("%sView:" % indent) self.out("%s-----" % indent) self.out("%s%s" % (indent, view_callable)) permission = getattr(view_wrapper, '__permission__', None) if permission is not None: self.out("%srequired permission = %s" % (indent, permission)) predicates = getattr(view_wrapper, '__predicates__', None) if predicates is not None: predicate_text = ', '.join([p.text() for p in predicates]) self.out("%sview predicates (%s)" % (indent, predicate_text)) def run(self): if len(self.args) < 2: self.out('Command requires a config file arg and a url arg') return 2 config_uri = self.args[0] url = self.args[1] if not url.startswith('/'): url = '/%s' % url request = Request.blank(url) env = self.bootstrap[0](config_uri, options=parse_vars(self.args[2:]), request=request) view = self._find_view(request) self.out('') self.out("URL = %s" % url) self.out('') if view is not None: self.out(" context: %s" % view.__request_attrs__['context']) self.out(" view name: %s" % view.__request_attrs__['view_name']) if IMultiView.providedBy(view): for dummy, view_wrapper, dummy in view.views: self.output_view_info(view_wrapper) if IMultiView.providedBy(view_wrapper): for dummy, mv_view_wrapper, dummy in view_wrapper.views: self.output_view_info(mv_view_wrapper, level=2) else: if view is not None: self.output_view_info(view) else: self.out(" Not found.") self.out('') env['closer']() return 0 if __name__ == '__main__': # pragma: no cover sys.exit(main() or 0)