""" This is the cache for page objects. Handles the automatic reloading of pages. """

def key(self, req):

""" Extracts the normalized filename from the request """

return req.filename

def check(self, key, req, entry):

config = req.get_config()

autoreload=int(config.get("PythonAutoReload", 1))

if autoreload==0 and entry._value is not NOT_INITIALIZED:

# if we don't want to reload and we have a value,

# then we consider it fresh

return None

else:

return ModuleCache.check(self, key, req, entry)

def build(self, key, req, opened, entry):

config = req.get_config()

log=int(config.get("PythonDebug", 0))

if log:

if entry._value is NOT_INITIALIZED:

req.log_error('Publisher loading page %s'%req.filename, apache.APLOG_NOTICE)

else:

req.log_error('Publisher reloading page %s'%req.filename, apache.APLOG_NOTICE)

req.allow_methods(["GET", "POST", "HEAD"])

if req.method not in ["GET", "POST", "HEAD"]:

raise apache.SERVER_RETURN, apache.HTTP_METHOD_NOT_ALLOWED

# Derive the name of the actual module which will be

# loaded. In older version of mod_python.publisher

# you can't actually have a code file name which has

# an embedded '.' in it except for that used by the

# extension. This is because the standard Python

# module import system which is used will think that

# you are importing a submodule of a package. In

# this code, because the standard Python module

# import system isn't used and the actual file is

# opened directly by name, an embedded '.' besides

# that used for the extension will technically work.

path,module_name = os.path.split(req.filename)

# If the request is against a directory, fallback to

# looking for the 'index' module. This is determined

# by virtue of the fact that Apache will always add

# a trailing slash to 'req.filename' when it matches

# a directory. This will mean that the calculated

# module name will be empty.

if not module_name:

module_name = 'index'

# Now need to strip off any special extension which

# was used to trigger this handler in the first place.

suffixes = ['py']

suffixes += req.get_addhandler_exts().split()

if req.extension:

suffixes.append(req.extension[1:])

exp = '\\.' + '$|\\.'.join(suffixes) + '$'

suff_matcher = re.compile(exp)

module_name = suff_matcher.sub('',module_name)

# Next need to determine the path for the function

# which will be called from 'req.path_info'. The

# leading slash and possibly any trailing slash are

# eliminated. There would normally be at most one

# trailing slash as Apache eliminates duplicates

# from the original URI.

func_path = ''

if req.path_info:

func_path = req.path_info[1:]

if func_path[-1:] == '/':

func_path = func_path[:-1]

# Now determine the actual Python module code file

# to load. This will first try looking for the file

# '/path/<module_name>.py'. If this doesn't exist,

# will try fallback of using the 'index' module,

# ie., look for '/path/index.py'. In doing this, the

# 'func_path' gets adjusted so the lead part is what

# 'module_name' was set to.

req.filename = path + '/' + module_name + '.py'

if not exists(req.filename):

if func_path:

func_path = module_name + '/' + func_path

else:

func_path = module_name

module_name = 'index'

req.filename = path + '/' + module_name + '.py'

if not exists(req.filename):

raise apache.SERVER_RETURN, apache.HTTP_NOT_FOUND

# Default to looking for the 'index' function if no

# function path definition was supplied.

if not func_path:

func_path = 'index'

# Turn slashes into dots.

func_path = func_path.replace('/', '.')

# Normalise req.filename to avoid Win32 issues.

req.filename = normpath(req.filename)

# We use the page cache to load the module

module = page_cache[req]

# does it have an __auth__?

realm, user, passwd = process_auth(req, module)

# resolve the object ('traverse')

object = resolve_object(req, module, func_path, realm, user, passwd)

# publish the object

published = publish_object(req, object)

# we log a message if nothing was published, it helps with debugging

if (not published) and (req._bytes_queued==0) and (req.next is None):

log=int(req.get_config().get("PythonDebug", 0))

if log:

req.log_error("mod_python.publisher: nothing to publish.")

found_auth, found_access = 0, 0

if hasattr(object, "__auth_realm__"):

realm = object.__auth_realm__

func_object = None

if type(object) is FunctionType:

func_object = object

elif type(object) == types.MethodType:

func_object = object.im_func

if func_object:

# functions are a bit tricky

func_code = func_object.func_code

func_globals = func_object.func_globals

def lookup(name):

i = None

if name in func_code.co_names:

i = list(func_code.co_names).index(name)

elif func_code.co_argcount < len(func_code.co_varnames):

names = func_code.co_varnames[func_code.co_argcount:]

if name in names:

i = list(names).index(name)

if i is not None:

return (1, func_code.co_consts[i+1])

return (0, None)

(found_auth, __auth__) = lookup('__auth__')

if found_auth and type(__auth__) == types.CodeType:

__auth__ = new.function(__auth__, func_globals)

(found_access, __access__) = lookup('__access__')

if found_access and type(__access__) == types.CodeType:

__access__ = new.function(__access__, func_globals)

(found_realm, __auth_realm__) = lookup('__auth_realm__')

if found_realm:

realm = __auth_realm__

else:

if hasattr(object, "__auth__"):

__auth__ = object.__auth__

found_auth = 1

if hasattr(object, "__access__"):

__access__ = object.__access__

found_access = 1

if found_auth or found_access:

# because ap_get_basic insists on making sure that AuthName and

# AuthType directives are specified and refuses to do anything

# otherwise (which is technically speaking a good thing), we

# have to do base64 decoding ourselves.

#

# to avoid needless header parsing, user and password are parsed

# once and the are received as arguments

if not user and req.headers_in.has_key("Authorization"):

try:

s = req.headers_in["Authorization"][6:]

s = base64.decodestring(s)

user, passwd = s.split(":", 1)

except:

raise apache.SERVER_RETURN, apache.HTTP_BAD_REQUEST

if found_auth:

if not user:

# note that Opera supposedly doesn't like spaces around "=" below

s = 'Basic realm="%s"' % realm

req.err_headers_out["WWW-Authenticate"] = s

raise apache.SERVER_RETURN, apache.HTTP_UNAUTHORIZED

if callable(__auth__):

rc = __auth__(req, user, passwd)

else:

if type(__auth__) is DictionaryType:

rc = __auth__.has_key(user) and __auth__[user] == passwd

else:

rc = __auth__

if not rc:

s = 'Basic realm = "%s"' % realm

req.err_headers_out["WWW-Authenticate"] = s

raise apache.SERVER_RETURN, apache.HTTP_UNAUTHORIZED

if found_access:

if callable(__access__):

rc = __access__(req, user)

else:

if type(__access__) in (ListType, TupleType):

rc = user in __access__

else:

rc = __access__

if not rc:

raise apache.SERVER_RETURN, apache.HTTP_FORBIDDEN

"""

parts = object_str.split('.')

first_object = True

for obj_str in parts:

# path components starting with an underscore are forbidden

if obj_str[0]=='_':

req.log_error('Cannot traverse %s in %s because '

'it starts with an underscore'

% (obj_str, req.unparsed_uri), apache.APLOG_WARNING)

raise apache.SERVER_RETURN, apache.HTTP_FORBIDDEN

if first_object:

first_object = False

else:

# if we're not in the first object (which is the module)

# we're going to check whether be can traverse this type or not

rule = tp_rules.get(type(obj), default_tp_rule)

if not rule[0]:

req.log_error('Cannot traverse %s in %s because '

'%s is not a traversable object'

% (obj_str, req.unparsed_uri, obj), apache.APLOG_WARNING)

raise apache.SERVER_RETURN, apache.HTTP_FORBIDDEN

# we know it's OK to call getattr

# note that getattr can really call some code because

# of property objects (or attribute with __get__ special methods)...

try:

obj = getattr(obj, obj_str)

except AttributeError:

raise apache.SERVER_RETURN, apache.HTTP_NOT_FOUND

# we process the authentication for the object

realm, user, passwd = process_auth(req, obj, realm, user, passwd)

# we're going to check if the final object is publishable

rule = tp_rules.get(type(obj), default_tp_rule)

if not rule[1]:

req.log_error('Cannot publish %s in %s because '

'%s is not publishable'

% (obj_str, req.unparsed_uri, obj), apache.APLOG_WARNING)

raise apache.SERVER_RETURN, apache.HTTP_FORBIDDEN

if callable(object):

# To publish callables, we call them an recursively publish the result

# of the call (as done by util.apply_fs_data)

req.form = util.FieldStorage(req, keep_blank_values=1)

return publish_object(req,util.apply_fs_data(object, req.form, req=req))

else:

if object is None:

# Nothing to publish

return False

elif isinstance(object,UnicodeType):

# We've got an Unicode string to publish, so we have to encode

# it to bytes. We try to detect the character encoding

# from the Content-Type header

if req._content_type_set:

charset = re_charset.search(req.content_type)

if charset:

charset = charset.group(1)

else:

# If no character encoding was set, we use UTF8

charset = 'UTF8'

req.content_type += '; charset=UTF8'

else:

# If no character encoding was set, we use UTF8

charset = 'UTF8'

result = object.encode(charset)

else:

charset = None

result = str(object)

if not req._content_type_set:

# make an attempt to guess content-type

# we look for a </HTML in the last 100 characters.

# re.search works OK with a negative start index (it starts from 0

# in that case)

if re_html.search(result,len(result)-100):

req.content_type = 'text/html'

else:

req.content_type = 'text/plain'

if charset is not None:

req.content_type += '; charset=%s'%charset

# Write result even if req.method is 'HEAD' as Apache

# will discard the final output anyway. Truncating

# output here if req.method is 'HEAD' is likely the

# wrong thing to do as it may cause problems for any

# output filters. See MODPYTHON-105 for details. We

# also do not flush output as that will prohibit use

# of 'CONTENT_LENGTH' filter to add 'Content-Length'

# header automatically. See MODPYTHON-107 for details.

req.write(result, 0)