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SP/web2py/gluon/rewrite.py

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2018-10-25 15:33:07 +00:00
#!/bin/env python
# -*- coding: utf-8 -*-
"""
| This file is part of the web2py Web Framework
| Copyrighted by Massimo Di Pierro <mdipierro@cs.depaul.edu>
| License: LGPLv3 (http://www.gnu.org/licenses/lgpl.html)
gluon.rewrite parses incoming URLs and formats outgoing URLs for gluon.html.URL.
In addition, it rewrites both incoming and outgoing URLs based on the (optional) user-supplied routes.py,
which also allows for rewriting of certain error messages.
routes.py supports two styles of URL rewriting, depending on whether 'routers' is defined.
Refer to router.example.py and routes.example.py for additional documentation.
"""
from __future__ import print_function
import os
import re
import logging
import traceback
import threading
from gluon.storage import Storage, List
from gluon.http import HTTP
from gluon.fileutils import abspath, read_file
from gluon.settings import global_settings
from gluon._compat import urllib_unquote, urllib_quote, iteritems, xrange, urllib_quote_plus
isdir = os.path.isdir
isfile = os.path.isfile
exists = os.path.exists
pjoin = os.path.join
logger = logging.getLogger('web2py.rewrite')
THREAD_LOCAL = threading.local() # thread-local storage for routing params
regex_at = re.compile(r'(?<!\\)\$[a-zA-Z]\w*')
regex_anything = re.compile(r'(?<!\\)\$anything')
regex_redirect = re.compile(r'(\d+)->(.*)')
regex_full_url = re.compile(
r'^(?P<scheme>http|https|HTTP|HTTPS)\://(?P<host>[^/]*)(?P<uri>.*)')
regex_version = re.compile(r'^(_[\d]+\.[\d]+\.[\d]+)$')
# pattern to find valid paths in url /application/controller/...
# this could be:
# for static pages:
# /<b:application>/static/<x:file>
# for dynamic pages:
# /<a:application>[/<c:controller>[/<f:function>[.<e:ext>][/<s:args>]]]
# application, controller, function and ext may only contain [a-zA-Z0-9_]
# file and args may also contain '-', '=', '.' and '/'
# apps in routes_apps_raw must parse raw_args into args
regex_url = re.compile('^/((?P<a>\w+)(/(?P<c>\w+)(/(?P<z>(?P<f>\w+)(\.(?P<e>[\w.]+))?(?P<s>.*)))?)?)?$')
regex_args = re.compile('[^\w/.@=-]')
def _router_default():
"""Returns new copy of default base router"""
router = Storage(
default_application='init',
applications='ALL',
default_controller='default',
controllers='DEFAULT',
default_function='index',
functions=dict(),
default_language=None,
languages=None,
root_static=['favicon.ico', 'robots.txt'],
map_static=None,
domains=None,
exclusive_domain=False,
map_hyphen=False,
acfe_match=r'\w+$', # legal app/ctlr/fcn/ext
#
# Implementation note:
# The file_match & args_match patterns use look-behind to avoid
# pathological backtracking from nested patterns.
#
file_match = r'([-+=@$%\w]|(?<=[-+=@$%\w])[./])*$', # legal static subpath
args_match=r'([\w@ =-]|(?<=[\w@ -])[.])*$',
)
return router
def _params_default(app=None):
"""Returns a new copy of default parameters"""
p = Storage()
p.name = app or "BASE"
p.default_application = app or "init"
p.default_controller = "default"
p.default_function = "index"
p.routes_app = []
p.routes_in = []
p.routes_out = []
p.routes_onerror = []
p.routes_apps_raw = []
p.error_handler = None
p.error_message = '<html><body><h1>%s</h1></body></html>'
p.error_message_ticket = \
'<html><body><h1>Internal error</h1>Ticket issued: <a href="/admin/default/ticket/%(ticket)s" target="_blank">%(ticket)s</a></body><!-- this is junk text else IE does not display the page: ' + ('x' * 512) + ' //--></html>'
p.routers = None
p.logging = 'off'
return p
params_apps = dict()
params = _params_default(app=None) # regex rewrite parameters
THREAD_LOCAL.routes = params # default to base regex rewrite parameters
routers = None
def log_rewrite(string):
"""Log rewrite activity under control of routes.py"""
if params.logging == 'debug': # catch common cases first
logger.debug(string)
elif params.logging == 'off' or not params.logging:
pass
elif params.logging == 'print':
print(string)
elif params.logging == 'info':
logger.info(string)
elif params.logging == 'warning':
logger.warning(string)
elif params.logging == 'error':
logger.error(string)
elif params.logging == 'critical':
logger.critical(string)
else:
logger.debug(string)
ROUTER_KEYS = set(
('default_application', 'applications',
'default_controller', 'controllers',
'default_function', 'functions',
'default_language', 'languages',
'domain', 'domains', 'root_static', 'path_prefix',
'exclusive_domain', 'map_hyphen', 'map_static',
'acfe_match', 'file_match', 'args_match'))
ROUTER_BASE_KEYS = set(
('applications', 'default_application',
'domains', 'path_prefix'))
# The external interface to rewrite consists of:
#
# load: load routing configuration file(s)
# url_in: parse and rewrite incoming URL
# url_out: assemble and rewrite outgoing URL
#
# THREAD_LOCAL.routes.default_application
# THREAD_LOCAL.routes.error_message
# THREAD_LOCAL.routes.error_message_ticket
# THREAD_LOCAL.routes.try_redirect_on_error
# THREAD_LOCAL.routes.error_handler
#
# filter_url: helper for doctest & unittest
# filter_err: helper for doctest & unittest
# regex_filter_out: doctest
def fixup_missing_path_info(environ):
eget = environ.get
path_info = eget('PATH_INFO')
request_uri = eget('REQUEST_URI')
if not path_info and request_uri:
# for fcgi, get path_info and
# query_string from request_uri
items = request_uri.split('?')
path_info = environ['PATH_INFO'] = items[0]
environ['QUERY_STRING'] = items[1] if len(items) > 1 else ''
elif not request_uri:
query_string = eget('QUERY_STRING')
if query_string:
environ['REQUEST_URI'] = '%s?%s' % (path_info, query_string)
else:
environ['REQUEST_URI'] = path_info
if not eget('HTTP_HOST'):
environ['HTTP_HOST'] = \
'%s:%s' % (eget('SERVER_NAME'), eget('SERVER_PORT'))
def url_in(request, environ):
"""Parses and rewrites incoming URL"""
if routers:
return map_url_in(request, environ)
return regex_url_in(request, environ)
def url_out(request, environ, application, controller, function,
args, other, scheme, host, port, language=None):
"""Assembles and rewrites outgoing URL"""
if routers:
acf = map_url_out(request, environ, application, controller,
function, args, other, scheme, host, port, language)
url = '%s%s' % (acf, other)
else:
url = '/%s/%s/%s%s' % (application, controller, function, other)
url = regex_filter_out(url, environ)
#
# fill in scheme and host if absolute URL is requested
# scheme can be a string, eg 'http', 'https', 'ws', 'wss'
#
if host is True or (host is None and (scheme or port is not None)):
host = request.env.http_host
if not scheme or scheme is True:
scheme = request.env.get('wsgi_url_scheme', 'http').lower() if request else 'http'
if host:
host_port = host if not port else host.split(':', 1)[0] + ':%s' % port
url = '%s://%s%s' % (scheme, host_port, url)
return url
def try_rewrite_on_error(http_response, request, environ, ticket=None):
"""
Called from main.wsgibase to rewrite the http response.
"""
status = int(str(http_response.status).split()[0])
if status >= 399 and THREAD_LOCAL.routes.routes_onerror:
keys = set(('%s/%s' % (request.application, status),
'%s/*' % (request.application),
'*/%s' % (status),
'*/*'))
for (key, uri) in THREAD_LOCAL.routes.routes_onerror:
if key in keys:
if uri == '!':
# do nothing!
return http_response, environ
elif '?' in uri:
path_info, query_string = uri.split('?', 1)
query_string += '&'
else:
path_info, query_string = uri, ''
query_string += \
'code=%s&ticket=%s&requested_uri=%s&request_url=%s' % \
(status, ticket, urllib_quote_plus(
request.env.request_uri), request.url)
if uri.startswith('http://') or uri.startswith('https://'):
# make up a response
url = path_info + '?' + query_string
message = 'You are being redirected <a href="%s">here</a>'
return HTTP(303, message % url, Location=url), environ
elif not environ.get('__ROUTES_ONERROR__', False):
# wsgibase will be called recursively with
# the routes_onerror path.
environ['__ROUTES_ONERROR__'] = True # limit recursion
path_info = '/' + path_info.lstrip('/')
environ['PATH_INFO'] = path_info
environ['QUERY_STRING'] = query_string
environ['WEB2PY_STATUS_CODE'] = status
return None, environ
# do nothing!
return http_response, environ
def try_redirect_on_error(http_object, request, ticket=None):
"""Called from main.wsgibase to rewrite the http response"""
status = int(str(http_object.status).split()[0])
if status > 399 and THREAD_LOCAL.routes.routes_onerror:
keys = set(('%s/%s' % (request.application, status),
'%s/*' % (request.application),
'*/%s' % (status),
'*/*'))
for (key, redir) in THREAD_LOCAL.routes.routes_onerror:
if key in keys:
if redir == '!':
break
elif '?' in redir:
url = '%s&code=%s&ticket=%s&requested_uri=%s&request_url=%s' % \
(redir, status, ticket,
urllib_quote_plus(request.env.request_uri),
request.url)
else:
url = '%s?code=%s&ticket=%s&requested_uri=%s&request_url=%s' % \
(redir, status, ticket,
urllib_quote_plus(request.env.request_uri),
request.url)
return HTTP(303, 'You are being redirected <a href="%s">here</a>' % url, Location=url)
return http_object
def load(routes='routes.py', app=None, data=None, rdict=None):
"""
load: read (if file) and parse routes
store results in params
(called from main.py at web2py initialization time)
If data is present, it's used instead of the routes.py contents.
If rdict is present, it must be a dict to be used for routers (unit test)
"""
global params
global routers
if app is None:
# reinitialize
global params_apps
params_apps = dict()
params = _params_default(app=None) # regex rewrite parameters
THREAD_LOCAL.routes = params # default to base regex rewrite parameters
routers = None
if isinstance(rdict, dict):
symbols = dict(routers=rdict)
path = 'rdict'
else:
if data is not None:
path = 'routes'
else:
if app is None:
path = abspath(routes)
else:
path = abspath('applications', app, routes)
if not exists(path):
return
data = read_file(path).replace('\r\n', '\n')
symbols = dict(app=app)
try:
exec(data, symbols)
except SyntaxError as e:
logger.error(
'%s has a syntax error and will not be loaded\n' % path
+ traceback.format_exc())
raise e
p = _params_default(app)
for sym in ('routes_app', 'routes_in', 'routes_out'):
if sym in symbols:
for items in symbols[sym]:
p[sym].append(compile_regex(*items))
for sym in ('routes_onerror', 'routes_apps_raw',
'error_handler', 'error_message', 'error_message_ticket',
'default_application', 'default_controller', 'default_function',
'logging'):
if sym in symbols:
p[sym] = symbols[sym]
if 'routers' in symbols:
p.routers = Storage(symbols['routers'])
for key in p.routers:
if isinstance(p.routers[key], dict):
p.routers[key] = Storage(p.routers[key])
if app is None:
params = p # install base rewrite parameters
THREAD_LOCAL.routes = params # install default as current routes
#
# create the BASE router if routers in use
#
routers = params.routers # establish routers if present
if isinstance(routers, dict):
routers = Storage(routers)
if routers is not None:
router = _router_default()
if routers.BASE:
router.update(routers.BASE)
routers.BASE = router
# scan each app in applications/
# create a router, if routers are in use
# parse the app-specific routes.py if present
#
all_apps = []
apppath = abspath('applications')
for appname in os.listdir(apppath):
if not appname.startswith('.') and \
isdir(abspath(apppath, appname)) and \
isdir(abspath(apppath, appname, 'controllers')):
all_apps.append(appname)
if routers:
router = Storage(routers.BASE) # new copy
if appname in routers:
for key in routers[appname].keys():
if key in ROUTER_BASE_KEYS:
raise SyntaxError("BASE-only key '%s' in router '%s'" % (key, appname))
router.update(routers[appname])
routers[appname] = router
if exists(abspath('applications', appname, routes)):
load(routes, appname)
if routers:
load_routers(all_apps)
else: # app
params_apps[app] = p
if routers and p.routers:
if app in p.routers:
routers[app].update(p.routers[app])
log_rewrite('URL rewrite is on. configuration in %s' % path)
def compile_regex(k, v, env=None):
"""
Preprocess and compile the regular expressions in routes_app/in/out
The resulting regex will match a pattern of the form::
[remote address]:[protocol]://[host]:[method] [path]
We allow abbreviated regexes on input; here we try to complete them.
"""
k0 = k # original k for error reporting
# bracket regex in ^...$ if not already done
if not k[0] == '^':
k = '^%s' % k
if not k[-1] == '$':
k = '%s$' % k
# if there are no :-separated parts, prepend a catch-all for the IP address
if k.find(':') < 0:
# k = '^.*?:%s' % k[1:]
k = '^.*?:https?://[^:/]+:[a-z]+ %s' % k[1:]
# if there's no ://, provide a catch-all for the protocol, host & method
if k.find('://') < 0:
i = k.find(':/')
if i < 0:
raise SyntaxError("routes pattern syntax error: path needs leading '/' [%s]" % k0)
k = r'%s:https?://[^:/]+:[a-z]+ %s' % (k[:i], k[i + 1:])
# $anything -> ?P<anything>.*
for item in regex_anything.findall(k):
k = k.replace(item, '(?P<anything>.*)')
# $a (etc) -> ?P<a>\w+
for item in regex_at.findall(k):
k = k.replace(item, r'(?P<%s>\w+)' % item[1:])
# same for replacement pattern, but with \g
for item in regex_at.findall(v):
v = v.replace(item, r'\g<%s>' % item[1:])
return (re.compile(k, re.DOTALL), v, env or {})
def load_routers(all_apps):
"""Load-time post-processing of routers"""
for app in routers:
# initialize apps with routers that aren't present,
# on behalf of unit tests
if app not in all_apps:
all_apps.append(app)
router = Storage(routers.BASE) # new copy
if app != 'BASE':
keys = set(routers[app]).intersection(ROUTER_BASE_KEYS)
if keys:
raise SyntaxError("BASE-only key(s) %s in router '%s'" % (
tuple(keys), app))
router.update(routers[app])
routers[app] = router
router = routers[app]
keys = set(router).difference(ROUTER_KEYS)
if keys:
raise SyntaxError("unknown key(s) %s in router '%s'" % (
tuple(keys), app))
if not router.controllers:
router.controllers = set()
elif not isinstance(router.controllers, str):
router.controllers = set(router.controllers)
if router.languages:
router.languages = set(router.languages)
else:
router.languages = set()
if router.functions:
if isinstance(router.functions, (set, tuple, list)):
functions = set(router.functions)
if isinstance(router.default_function, str):
functions.add(
router.default_function) # legacy compatibility
router.functions = {router.default_controller: functions}
for controller in router.functions:
router.functions[controller] = set(
router.functions[controller])
else:
router.functions = dict()
if app != 'BASE':
for base_only in ROUTER_BASE_KEYS:
router.pop(base_only, None)
if 'domain' in router:
routers.BASE.domains[router.domain] = app
if isinstance(router.controllers, str) and router.controllers == 'DEFAULT':
router.controllers = set()
if isdir(abspath('applications', app)):
cpath = abspath('applications', app, 'controllers')
for cname in os.listdir(cpath):
if isfile(abspath(cpath, cname)) and cname.endswith('.py'):
router.controllers.add(cname[:-3])
if router.controllers:
router.controllers.add('static')
router.controllers.add(router.default_controller)
if isinstance(routers.BASE.applications, str) and routers.BASE.applications == 'ALL':
routers.BASE.applications = list(all_apps)
if routers.BASE.applications:
routers.BASE.applications = set(routers.BASE.applications)
else:
routers.BASE.applications = set()
for app in routers.keys():
# set router name
router = routers[app]
router.name = app
# compile URL validation patterns
router._acfe_match = re.compile(router.acfe_match)
router._file_match = re.compile(router.file_match)
if router.args_match:
router._args_match = re.compile(router.args_match)
# convert path_prefix to a list of path elements
if router.path_prefix:
if isinstance(router.path_prefix, str):
router.path_prefix = router.path_prefix.strip('/').split('/')
# rewrite BASE.domains as tuples
#
# key: 'domain[:port]' -> (domain, port)
# value: 'application[/controller] -> (application, controller)
# (port and controller may be None)
#
domains = dict()
if routers.BASE.domains:
for (d, a) in iteritems(routers.BASE.domains):
(domain, app) = (d.strip(':'), a.strip('/'))
if ':' in domain:
(domain, port) = domain.split(':')
else:
port = None
if '/' in app:
(app, ctlr) = app.split('/', 1)
else:
ctlr = None
if ctlr and '/' in ctlr:
(ctlr, fcn) = ctlr.split('/')
else:
fcn = None
if app not in all_apps and app not in routers:
raise SyntaxError("unknown app '%s' in domains" % app)
domains[(domain, port)] = (app, ctlr, fcn)
routers.BASE.domains = domains
def regex_uri(e, regexes, tag, default=None):
"""Filters incoming URI against a list of regexes"""
path = e['PATH_INFO']
host = e.get('HTTP_HOST', e.get('SERVER_NAME', 'localhost')).lower()
i = host.find(':')
if i > 0:
host = host[:i]
key = '%s:%s://%s:%s %s' % \
(e.get('REMOTE_ADDR', 'localhost'),
e.get('wsgi.url_scheme', 'http').lower(), host,
e.get('REQUEST_METHOD', 'get').lower(), path)
for (regex, value, custom_env) in regexes:
if regex.match(key):
e.update(custom_env)
rewritten = regex.sub(value, key)
log_rewrite('%s: [%s] [%s] -> %s' % (tag, key, value, rewritten))
return rewritten
log_rewrite('%s: [%s] -> %s (not rewritten)' % (tag, key, default))
return default
def regex_select(env=None, app=None, request=None):
"""
Selects a set of regex rewrite params for the current request
"""
if app:
THREAD_LOCAL.routes = params_apps.get(app, params)
elif env and params.routes_app:
if routers:
map_url_in(request, env, app=True)
else:
app = regex_uri(env, params.routes_app, "routes_app")
THREAD_LOCAL.routes = params_apps.get(app, params)
else:
THREAD_LOCAL.routes = params # default to base rewrite parameters
log_rewrite("select routing parameters: %s" % THREAD_LOCAL.routes.name)
return app # for doctest
def regex_filter_in(e):
"""Regex rewrite incoming URL"""
routes = THREAD_LOCAL.routes
query = e.get('QUERY_STRING', None)
e['WEB2PY_ORIGINAL_URI'] = e['PATH_INFO'] + (query and ('?' + query) or '')
if routes.routes_in:
path = regex_uri(e, routes.routes_in,
"routes_in", e['PATH_INFO'])
rmatch = regex_redirect.match(path)
if rmatch:
raise HTTP(int(rmatch.group(1)), location=rmatch.group(2))
items = path.split('?', 1)
e['PATH_INFO'] = items[0]
if len(items) > 1:
if query:
query = items[1] + '&' + query
else:
query = items[1]
e['QUERY_STRING'] = query
e['REQUEST_URI'] = e['PATH_INFO'] + (query and ('?' + query) or '')
return e
def sluggify(key):
return key.lower().replace('.', '_')
def invalid_url(routes):
raise HTTP(400,
routes.error_message % 'invalid request',
web2py_error='invalid path')
def regex_url_in(request, environ):
"""Rewrites and parses incoming URL"""
# ##################################################
# select application
# rewrite URL if routes_in is defined
# update request.env
# ##################################################
regex_select(env=environ, request=request)
routes = THREAD_LOCAL.routes
if routes.routes_in:
environ = regex_filter_in(environ)
request.env.update(
(k.lower().replace('.', '_'), v) for k, v in iteritems(environ))
# ##################################################
# serve if a static file
# ##################################################
path = urllib_unquote(request.env.path_info) or '/'
path = path.replace('\\', '/')
if path.endswith('/') and len(path) > 1:
path = path[:-1]
match = regex_url.match(path)
if not match:
invalid_url(routes)
request.raw_args = (match.group('s') or '')
if request.raw_args.startswith('/'):
request.raw_args = request.raw_args[1:]
if match.group('c') == 'static':
application = match.group('a')
version, filename = None, match.group('z')
if not filename:
raise HTTP(404)
filename = filename.replace(' ','_')
items = filename.split('/', 1)
if regex_version.match(items[0]):
version, filename = items
static_folder = pjoin(global_settings.applications_parent,
'applications', application, 'static')
static_file = os.path.abspath(pjoin(static_folder, filename))
if not static_file.startswith(static_folder):
invalid_url(routes)
return (static_file, version, environ)
else:
# ##################################################
# parse application, controller and function
# ##################################################
request.application = match.group('a') or routes.default_application
request.controller = match.group('c') or routes.default_controller
request.function = match.group('f') or routes.default_function
request.raw_extension = match.group('e')
request.extension = request.raw_extension or 'html'
if request.application in routes.routes_apps_raw:
# application is responsible for parsing args
request.args = None
elif request.raw_args:
args = regex_args.sub('_', request.raw_args)
request.args = List(args.split('/'))
else:
request.args = List([])
return (None, None, environ)
def regex_filter_out(url, e=None):
"""Regex rewrite outgoing URL"""
if not hasattr(THREAD_LOCAL, 'routes'):
regex_select() # ensure routes is set (for application threads)
routes = THREAD_LOCAL.routes
if routers:
return url # already filtered
if routes.routes_out:
items = url.split('?', 1)
if e:
host = e.get('http_host', 'localhost').lower()
i = host.find(':')
if i > 0:
host = host[:i]
items[0] = '%s:%s://%s:%s %s' % \
(e.get('remote_addr', ''),
e.get('wsgi_url_scheme', 'http').lower(), host,
e.get('request_method', 'get').lower(), items[0])
else:
items[0] = ':http://localhost:get %s' % items[0]
for (regex, value, tmp) in routes.routes_out:
if regex.match(items[0]):
rewritten = '?'.join([regex.sub(value, items[0])] + items[1:])
log_rewrite('routes_out: [%s] -> %s' % (url, rewritten))
return rewritten
log_rewrite('routes_out: [%s] not rewritten' % url)
return url
def filter_url(url, method='get', remote='0.0.0.0',
out=False, app=False, lang=None,
domain=(None, None), env=False, scheme=None,
host=None, port=None, language=None):
"""
doctest/unittest interface to regex_filter_in() and regex_filter_out()
"""
match = regex_full_url.match(url)
urlscheme = match.group('scheme').lower()
urlhost = match.group('host').lower()
uri = match.group('uri')
k = uri.find('?')
if k < 0:
k = len(uri)
if isinstance(domain, str):
domain = (domain, None)
(path_info, query_string) = (uri[:k], uri[k + 1:])
path_info = urllib_unquote(path_info) # simulate server
e = {
'REMOTE_ADDR': remote,
'REQUEST_METHOD': method,
'wsgi.url_scheme': urlscheme,
'HTTP_HOST': urlhost,
'REQUEST_URI': uri,
'PATH_INFO': path_info,
'QUERY_STRING': query_string,
#for filter_out request.env use lowercase
'remote_addr': remote,
'request_method': method,
'wsgi_url_scheme': urlscheme,
'http_host': urlhost
}
request = Storage()
e["applications_parent"] = global_settings.applications_parent
request.env = Storage(e)
request.uri_language = lang
# determine application only
#
if app:
if routers:
return map_url_in(request, e, app=True)
return regex_select(e)
# rewrite outbound URL
#
if out:
(request.env.domain_application,
request.env.domain_controller) = domain
items = path_info.lstrip('/').split('/')
if items[-1] == '':
items.pop() # adjust trailing empty args
assert len(items) >= 3, "at least /a/c/f is required"
a = items.pop(0)
c = items.pop(0)
f = items.pop(0)
if not routers:
return regex_filter_out(uri, e)
acf = map_url_out(
request, None, a, c, f, items, None, scheme, host, port, language=language)
if items:
url = '%s/%s' % (acf, '/'.join(items))
if items[-1] == '':
url += '/'
else:
url = acf
if query_string:
url += '?' + query_string
return url
# rewrite inbound URL
#
(static, version, e) = url_in(request, e)
if static:
return static
result = "/%s/%s/%s" % (
request.application, request.controller, request.function)
if request.extension and request.extension != 'html':
result += ".%s" % request.extension
if request.args:
result += " %s" % request.args
if e['QUERY_STRING']:
result += " ?%s" % e['QUERY_STRING']
if request.uri_language:
result += " (%s)" % request.uri_language
if env:
return request.env
return result
def filter_err(status, application='app', ticket='tkt'):
"""doctest/unittest interface to routes_onerror"""
routes = THREAD_LOCAL.routes
if status > 399 and routes.routes_onerror:
keys = set(('%s/%s' % (application, status),
'%s/*' % (application),
'*/%s' % (status),
'*/*'))
for (key, redir) in routes.routes_onerror:
if key in keys:
if redir == '!':
break
elif '?' in redir:
url = redir + '&' + 'code=%s&ticket=%s' % (status, ticket)
else:
url = redir + '?' + 'code=%s&ticket=%s' % (status, ticket)
return url # redirection
return status # no action
# router support
#
class MapUrlIn(object):
"""Logic for mapping incoming URLs"""
def __init__(self, request=None, env=None):
"""Initializes a map-in object"""
self.request = request
self.env = env
self.router = None
self.application = None
self.language = None
self.controller = None
self.function = None
self.extension = 'html'
self.controllers = set()
self.functions = dict()
self.languages = set()
self.default_language = None
self.map_hyphen = False
self.exclusive_domain = False
path = self.env['PATH_INFO']
self.query = self.env.get('QUERY_STRING', None)
path = path.lstrip('/')
self.env['PATH_INFO'] = '/' + path
self.env['WEB2PY_ORIGINAL_URI'] = self.env['PATH_INFO'] + (
self.query and ('?' + self.query) or '')
# to handle empty args, strip exactly one trailing slash, if present
# .../arg1// represents one trailing empty arg
#
if path.endswith('/'):
path = path[:-1]
self.args = List(path and path.split('/') or [])
# see http://www.python.org/dev/peps/pep-3333/#url-reconstruction for URL composition
self.remote_addr = self.env.get('REMOTE_ADDR', 'localhost')
self.scheme = self.env.get('wsgi.url_scheme', 'http').lower()
self.method = self.env.get('REQUEST_METHOD', 'get').lower()
(self.host, self.port) = (self.env.get('HTTP_HOST'), None)
if not self.host:
(self.host, self.port) = (
self.env.get('SERVER_NAME'), self.env.get('SERVER_PORT'))
if not self.host:
(self.host, self.port) = ('localhost', '80')
if ':' in self.host:
(self.host, self.port) = self.host.rsplit(':', 1) # for ipv6 support
if not self.port:
self.port = '443' if self.scheme == 'https' else '80'
def map_prefix(self):
"""Strips path prefix, if present in its entirety"""
prefix = routers.BASE.path_prefix
if prefix:
prefixlen = len(prefix)
if prefixlen > len(self.args):
return
for i in xrange(prefixlen):
if prefix[i] != self.args[i]:
return # prefix didn't match
self.args = List(self.args[prefixlen:]) # strip the prefix
def map_app(self):
"""Determines application name"""
base = routers.BASE # base router
self.domain_application = None
self.domain_controller = None
self.domain_function = None
self.map_hyphen = base.map_hyphen
arg0 = self.harg0
if not base.exclusive_domain and base.applications and arg0 in base.applications:
self.application = arg0
elif not base.exclusive_domain and arg0 and not base.applications:
self.application = arg0
elif (self.host, self.port) in base.domains:
(self.application, self.domain_controller,
self.domain_function) = base.domains[(self.host, self.port)]
self.env['domain_application'] = self.application
self.env['domain_controller'] = self.domain_controller
self.env['domain_function'] = self.domain_function
elif (self.host, None) in base.domains:
(self.application, self.domain_controller,
self.domain_function) = base.domains[(self.host, None)]
self.env['domain_application'] = self.application
self.env['domain_controller'] = self.domain_controller
self.env['domain_function'] = self.domain_function
elif base.applications and arg0 in base.applications:
self.application = arg0
elif arg0 and not base.applications:
self.application = arg0
else:
self.application = base.default_application or ''
self.pop_arg_if(self.application == arg0)
if not base._acfe_match.match(self.application):
raise HTTP(
400, THREAD_LOCAL.routes.error_message % 'invalid request',
web2py_error="invalid application: '%s'" % self.application)
if self.application not in routers and \
(self.application != THREAD_LOCAL.routes.default_application or self.application == 'welcome'):
raise HTTP(
400, THREAD_LOCAL.routes.error_message % 'invalid request',
web2py_error="unknown application: '%s'" % self.application)
# set the application router
#
log_rewrite("select application=%s" % self.application)
self.request.application = self.application
if self.application not in routers:
self.router = routers.BASE # support gluon.main.wsgibase init->welcome
else:
self.router = routers[self.application] # application router
self.controllers = self.router.controllers
self.default_controller = self.domain_controller or self.router.default_controller
self.functions = self.router.functions
self.languages = self.router.languages
self.default_language = self.router.default_language
self.map_hyphen = self.router.map_hyphen
self.exclusive_domain = self.router.exclusive_domain
self._acfe_match = self.router._acfe_match
self.file_match = self.router.file_match
self._file_match = self.router._file_match
self._args_match = self.router._args_match
def map_root_static(self):
"""
Handles root-static files (no hyphen mapping)
a root-static file is one whose incoming URL expects it to be at the root,
typically robots.txt & favicon.ico
"""
if len(self.args) == 1 and self.arg0 in self.router.root_static:
self.controller = self.request.controller = 'static'
root_static_file = pjoin(global_settings.applications_parent,
'applications', self.application,
self.controller, self.arg0)
log_rewrite("route: root static=%s" % root_static_file)
return root_static_file, None
return None, None
def map_language(self):
"""Handles language (no hyphen mapping)"""
arg0 = self.arg0 # no hyphen mapping
if arg0 and self.languages and arg0 in self.languages:
self.language = arg0
else:
self.language = self.default_language
if self.language:
log_rewrite("route: language=%s" % self.language)
self.pop_arg_if(self.language == arg0)
arg0 = self.arg0
def map_controller(self):
"""Identifies controller"""
# handle controller
#
arg0 = self.harg0 # map hyphens
if not arg0 or (self.controllers and arg0 not in self.controllers):
self.controller = self.default_controller or ''
else:
self.controller = arg0
self.pop_arg_if(arg0 == self.controller)
log_rewrite("route: controller=%s" % self.controller)
if not self.router._acfe_match.match(self.controller):
raise HTTP(
400, THREAD_LOCAL.routes.error_message % 'invalid request',
web2py_error='invalid controller')
def map_static(self):
"""
Handles static files
file_match but no hyphen mapping
"""
if self.controller != 'static':
return None, None
version = regex_version.match(self.args(0))
if self.args and version:
file = '/'.join(self.args[1:])
else:
file = '/'.join(self.args)
if len(self.args) == 0:
bad_static = True # require a file name
elif '/' in self.file_match:
# match the path
bad_static = not self.router._file_match.match(file)
else:
# match path elements
bad_static = False
for name in self.args:
bad_static = bad_static or name in (
'', '.', '..') or not self.router._file_match.match(name)
if bad_static:
log_rewrite('bad static path=%s' % file)
raise HTTP(400,
THREAD_LOCAL.routes.error_message % 'invalid request',
web2py_error='invalid static file')
#
# support language-specific static subdirectories,
# eg /appname/en/static/filename => applications/appname/static/en/filename
# if language-specific file doesn't exist, try same file in static
#
if self.language:
static_file = pjoin(global_settings.applications_parent,
'applications', self.application,
'static', self.language, file)
if not self.language or not isfile(static_file):
static_file = pjoin(global_settings.applications_parent,
'applications', self.application,
'static', file)
self.extension = None
log_rewrite("route: static=%s" % static_file)
return static_file, version
def map_function(self):
"""Handles function.extension"""
arg0 = self.harg0 # map hyphens
functions = self.functions.get(self.controller, set())
if isinstance(self.router.default_function, dict):
default_function = self.router.default_function.get(
self.controller, None)
else:
default_function = self.router.default_function # str or None
default_function = self.domain_function or default_function
if not arg0 or functions and arg0.split('.')[0] not in functions:
self.function = default_function or ""
self.pop_arg_if(arg0 and self.function == arg0)
else:
func_ext = arg0.split('.')
if len(func_ext) > 1:
self.function = func_ext[0]
self.extension = func_ext[-1]
else:
self.function = arg0
self.pop_arg_if(True)
log_rewrite(
"route: function.ext=%s.%s" % (self.function, self.extension))
if not self.router._acfe_match.match(self.function):
raise HTTP(
400, THREAD_LOCAL.routes.error_message % 'invalid request',
web2py_error='invalid function')
if self.extension and not self.router._acfe_match.match(self.extension):
raise HTTP(
400, THREAD_LOCAL.routes.error_message % 'invalid request',
web2py_error='invalid extension')
def validate_args(self):
"""
Checks args against validation pattern
"""
for arg in self.args:
if not self.router._args_match.match(arg):
raise HTTP(
400, THREAD_LOCAL.routes.error_message % 'invalid request',
web2py_error='invalid arg <%s>' % arg)
def sluggify(self):
self.request.env.update(
(k.lower().replace('.', '_'), v) for k, v in iteritems(self.env))
def update_request(self):
"""
Updates request from self
Builds env.request_uri
Makes lower-case versions of http headers in env
"""
self.request.application = self.application
self.request.controller = self.controller
self.request.function = self.function
self.request.extension = self.extension
self.request.args = self.args
if self.language:
self.request.uri_language = self.language
uri = '/%s/%s' % (self.controller, self.function)
app = self.application
if self.map_hyphen:
uri = uri.replace('_', '-')
app = app.replace('_', '-')
if self.extension and self.extension != 'html':
uri += '.' + self.extension
if self.language:
uri = '/%s%s' % (self.language, uri)
uri = '/%s%s%s%s' % (
app,
uri,
urllib_quote('/' + '/'.join(
str(x) for x in self.args)) if self.args else '',
('?' + self.query) if self.query else '')
self.env['REQUEST_URI'] = uri
self.sluggify()
@property
def arg0(self):
"""Returns first arg"""
return self.args(0)
@property
def harg0(self):
"""Returns first arg with optional hyphen mapping"""
if self.map_hyphen and self.args(0):
return self.args(0).replace('-', '_')
return self.args(0)
def pop_arg_if(self, dopop):
"""Conditionally removes first arg and returns new first arg"""
if dopop:
self.args.pop(0)
class MapUrlOut(object):
"""Logic for mapping outgoing URLs"""
def __init__(self, request, env, application, controller,
function, args, other, scheme, host, port, language):
"""initialize a map-out object"""
self.default_application = routers.BASE.default_application
if application in routers:
self.router = routers[application]
else:
self.router = routers.BASE
self.request = request
self.env = env
self.application = application
self.controller = controller
self.is_static = (
controller == 'static' or controller.startswith('static/'))
self.function = function
self.args = args
self.other = other
self.scheme = scheme
self.host = host
self.port = port
self.language = language
self.applications = routers.BASE.applications
self.controllers = self.router.controllers
self.functions = self.router.functions.get(self.controller, set())
self.languages = self.router.languages
self.default_language = self.router.default_language
self.exclusive_domain = self.router.exclusive_domain
self.map_hyphen = self.router.map_hyphen
self.map_static = self.router.map_static
self.path_prefix = routers.BASE.path_prefix
self.domain_application = request and self.request.env.domain_application
self.domain_controller = request and self.request.env.domain_controller
if isinstance(self.router.default_function, dict):
self.default_function = self.router.default_function.get(
self.controller, None)
else:
self.default_function = self.router.default_function
if (self.router.exclusive_domain
and self.domain_application
and self.domain_application != self.application
and not self.host):
raise SyntaxError('cross-domain conflict: must specify host')
lang = self.language if self.language else request and request.uri_language
if lang and self.languages and lang in self.languages:
self.language = lang
else:
self.language = None
self.omit_application = False
self.omit_language = False
self.omit_controller = False
self.omit_function = False
def omit_lang(self):
"""Omits language if possible"""
if not self.language or self.language == self.default_language:
self.omit_language = True
def omit_acf(self):
"""Omits what we can of a/c/f"""
router = self.router
# Handle the easy no-args case of tail-defaults: /a/c /a /
#
if not self.args and self.function == self.default_function:
self.omit_function = True
if self.controller == router.default_controller:
self.omit_controller = True
if self.application == self.default_application:
self.omit_application = True
# omit default application
# (which might be the domain default application)
#
default_application = self.domain_application or self.default_application
if self.application == default_application:
self.omit_application = True
# omit controller if default controller
#
default_controller = ((self.application == self.domain_application) and self.domain_controller) or router.default_controller or ''
if self.controller == default_controller:
self.omit_controller = True
# omit function if possible
#
if self.functions and self.function in self.functions and self.function == self.default_function:
self.omit_function = True
# prohibit ambiguous cases
#
# because we presume the lang string to be unambiguous, its presence protects application omission
#
if self.exclusive_domain:
applications = [self.domain_application]
else:
applications = self.applications
if self.omit_language:
if not applications or self.controller in applications:
self.omit_application = False
if self.omit_application:
if not applications or self.function in applications:
self.omit_controller = False
if not self.controllers or self.function in self.controllers:
self.omit_controller = False
if self.args:
if self.args[0] in self.functions or self.args[0] in self.controllers or self.args[0] in applications:
self.omit_function = False
if self.omit_controller:
if self.function in self.controllers or self.function in applications:
self.omit_controller = False
if self.omit_application:
if self.controller in applications:
self.omit_application = False
# handle static as a special case
# (easier for external static handling)
#
if self.is_static:
if not self.map_static:
self.omit_application = False
if self.language:
self.omit_language = False
self.omit_controller = False
self.omit_function = False
def build_acf(self):
"Builds a/c/f from components"
acf = ''
if self.map_hyphen:
self.controller = self.controller.replace('_', '-')
if self.controller != 'static' and not self.controller.startswith('static/'):
self.application = self.application.replace('_', '-')
self.function = self.function.replace('_', '-')
if not self.omit_application:
acf += '/' + self.application
# handle case of flipping lang/static/file to static/lang/file for external rewrite
if self.is_static and self.map_static is False and not self.omit_language:
acf += '/' + self.controller + '/' + self.language
else:
if not self.omit_language:
acf += '/' + self.language
if not self.omit_controller:
acf += '/' + self.controller
if not self.omit_function:
acf += '/' + self.function
if self.path_prefix:
acf = '/' + '/'.join(self.path_prefix) + acf
if self.args:
return acf
return acf or '/'
def acf(self):
"""Converts components to /app/lang/controller/function"""
if not routers:
return None # use regex filter
self.omit_lang() # try to omit language
self.omit_acf() # try to omit a/c/f
return self.build_acf() # build and return the /a/lang/c/f string
def map_url_in(request, env, app=False):
"""Routes incoming URL"""
# initialize router-url object
#
THREAD_LOCAL.routes = params # default to base routes
map = MapUrlIn(request=request, env=env)
map.sluggify()
map.map_prefix() # strip prefix if present
map.map_app() # determine application
# configure THREAD_LOCAL.routes for error rewrite
#
if params.routes_app:
THREAD_LOCAL.routes = params_apps.get(app, params)
if app:
return map.application
root_static_file, version = map.map_root_static(
) # handle root-static files
if root_static_file:
map.update_request()
return (root_static_file, version, map.env)
# handle mapping of lang/static to static/lang in externally-rewritten URLs
# in case we have to handle them ourselves
if map.languages and map.map_static is False and map.arg0 == 'static' and map.args(1) in map.languages:
map.map_controller()
map.map_language()
else:
map.map_language()
map.map_controller()
static_file, version = map.map_static()
if static_file:
map.update_request()
return (static_file, version, map.env)
map.map_function()
map.validate_args()
map.update_request()
return (None, None, map.env)
def map_url_out(request, env, application, controller,
function, args, other, scheme, host, port, language=None):
"""
Supply /a/c/f (or /a/lang/c/f) portion of outgoing url
The basic rule is that we can only make transformations
that map_url_in can reverse.
Suppose that the incoming arguments are a,c,f,args,lang
and that the router defaults are da, dc, df, dl.
We can perform these transformations trivially if args=[] and lang=None or dl::
/da/dc/df => /
/a/dc/df => /a
/a/c/df => /a/c
We would also like to be able to strip the default application or application/controller
from URLs with function/args present, thus::
/da/c/f/args => /c/f/args
/da/dc/f/args => /f/args
We use [applications] and [controllers] and {functions} to suppress ambiguous omissions.
We assume that language names do not collide with a/c/f names.
"""
map = MapUrlOut(request, env, application, controller,
function, args, other, scheme, host, port, language)
return map.acf()
def get_effective_router(appname):
"""Returns a private copy of the effective router for the specified application"""
if not routers or appname not in routers:
return None
return Storage(routers[appname]) # return a copy
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