python-flask-route

1. add_url_rule

def add_url_rule(self, rule, endpoint, **options): options['endpoint'] = endpoint options.setdefault('methods', ('GET',)) self.url_map.add(Rule(rule, **options))

2. route

def route(self, rule, **options): def decorator(f): self.add_url_rule(rule, f.__name__, **options) self.view_functions[f.__name__] = f return f return decorator

3. url_map 和 view_function

from werkzeug.routing import Map class Flask(object): def __init__(self, package_name): ... self.view_functions = {} self.url_map = Map() ...

4. Rule类

class Rule(RuleFactory): def __init__(self, string, defaults=None,subdomain=None, methods=None, build_only=False, endpoint=None, strict_slashes=None, redirect_to=None, alias=False, host=None): if not string.startswith('/'): raise ValueError('urls must start with a leading slash') self.rule = string self.is_leaf = not string.endswith('/') self.map = None self.strict_slashes = strict_slashes self.subdomain = subdomain self.host = host self.defaults = defaults self.build_only = build_only self.alias = alias if methods is None: self.methods = None else: self.methods = set([x.upper() for x in methods]) if 'HEAD' not in self.methods and 'GET' in self.methods: self.methods.add('HEAD') self.endpoint = endpoint self.redirect_to = redirect_to if defaults: self.arguments = set(map(str, defaults)) else: self.arguments = set() self._trace = self._converters = self._regex = self._weights = Nonclass

5. Map类

Map(object): default_converters = ImmutableDict(DEFAULT_CONVERTERS) def __init__(self, rules=None, default_subdomain='', charset='utf-8', redirect_defaults=True, converters=None, sort_parameters=False, sort_key=None, encoding_errors='replace', host_matching=False): self._rules = [] self._rules_by_endpoint = {} self._remap = True self._remap_lock = Lock(） ... def add(self, rulefactory): for rule in rulefactory.get_rules(self): rule.bind(self) self._rules.append(rule) self._rules_by_endpoint.setdefault(rule.endpoint, []).append(rule) self._remap = True

route —–> add_url_rule/view_functions —–> Rule —–> url_map_add