mirror of
https://github.com/SickGear/SickGear.git
synced 2024-12-11 13:43:37 +00:00
cec4ed573d
Switched out sqlite3 libs in favour of SQLAlchemy v0.9, will gradually migrate dialects and scheme to be fully SQLAlchemy compliant for using there ORM with sessions instead of direct. Fixed getEpisode function to stop making unrequired scene number conversions on already converted data thats available now from cache.
426 lines
16 KiB
Python
426 lines
16 KiB
Python
"""WSGI interface (see PEP 333 and 3333).
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Note that WSGI environ keys and values are 'native strings'; that is,
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whatever the type of "" is. For Python 2, that's a byte string; for Python 3,
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it's a unicode string. But PEP 3333 says: "even if Python's str type is
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actually Unicode "under the hood", the content of native strings must
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still be translatable to bytes via the Latin-1 encoding!"
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"""
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import sys as _sys
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import cherrypy as _cherrypy
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from cherrypy._cpcompat import BytesIO, bytestr, ntob, ntou, py3k, unicodestr
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from cherrypy import _cperror
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from cherrypy.lib import httputil
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def downgrade_wsgi_ux_to_1x(environ):
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"""Return a new environ dict for WSGI 1.x from the given WSGI u.x environ.
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"""
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env1x = {}
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url_encoding = environ[ntou('wsgi.url_encoding')]
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for k, v in list(environ.items()):
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if k in [ntou('PATH_INFO'), ntou('SCRIPT_NAME'), ntou('QUERY_STRING')]:
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v = v.encode(url_encoding)
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elif isinstance(v, unicodestr):
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v = v.encode('ISO-8859-1')
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env1x[k.encode('ISO-8859-1')] = v
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return env1x
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class VirtualHost(object):
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"""Select a different WSGI application based on the Host header.
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This can be useful when running multiple sites within one CP server.
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It allows several domains to point to different applications. For example::
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root = Root()
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RootApp = cherrypy.Application(root)
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Domain2App = cherrypy.Application(root)
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SecureApp = cherrypy.Application(Secure())
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vhost = cherrypy._cpwsgi.VirtualHost(RootApp,
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domains={'www.domain2.example': Domain2App,
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'www.domain2.example:443': SecureApp,
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})
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cherrypy.tree.graft(vhost)
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"""
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default = None
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"""Required. The default WSGI application."""
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use_x_forwarded_host = True
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"""If True (the default), any "X-Forwarded-Host"
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request header will be used instead of the "Host" header. This
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is commonly added by HTTP servers (such as Apache) when proxying."""
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domains = {}
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"""A dict of {host header value: application} pairs.
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The incoming "Host" request header is looked up in this dict,
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and, if a match is found, the corresponding WSGI application
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will be called instead of the default. Note that you often need
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separate entries for "example.com" and "www.example.com".
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In addition, "Host" headers may contain the port number.
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"""
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def __init__(self, default, domains=None, use_x_forwarded_host=True):
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self.default = default
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self.domains = domains or {}
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self.use_x_forwarded_host = use_x_forwarded_host
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def __call__(self, environ, start_response):
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domain = environ.get('HTTP_HOST', '')
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if self.use_x_forwarded_host:
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domain = environ.get("HTTP_X_FORWARDED_HOST", domain)
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nextapp = self.domains.get(domain)
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if nextapp is None:
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nextapp = self.default
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return nextapp(environ, start_response)
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class InternalRedirector(object):
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"""WSGI middleware that handles raised cherrypy.InternalRedirect."""
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def __init__(self, nextapp, recursive=False):
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self.nextapp = nextapp
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self.recursive = recursive
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def __call__(self, environ, start_response):
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redirections = []
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while True:
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environ = environ.copy()
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try:
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return self.nextapp(environ, start_response)
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except _cherrypy.InternalRedirect:
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ir = _sys.exc_info()[1]
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sn = environ.get('SCRIPT_NAME', '')
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path = environ.get('PATH_INFO', '')
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qs = environ.get('QUERY_STRING', '')
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# Add the *previous* path_info + qs to redirections.
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old_uri = sn + path
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if qs:
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old_uri += "?" + qs
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redirections.append(old_uri)
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if not self.recursive:
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# Check to see if the new URI has been redirected to
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# already
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new_uri = sn + ir.path
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if ir.query_string:
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new_uri += "?" + ir.query_string
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if new_uri in redirections:
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ir.request.close()
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raise RuntimeError("InternalRedirector visited the "
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"same URL twice: %r" % new_uri)
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# Munge the environment and try again.
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environ['REQUEST_METHOD'] = "GET"
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environ['PATH_INFO'] = ir.path
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environ['QUERY_STRING'] = ir.query_string
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environ['wsgi.input'] = BytesIO()
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environ['CONTENT_LENGTH'] = "0"
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environ['cherrypy.previous_request'] = ir.request
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class ExceptionTrapper(object):
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"""WSGI middleware that traps exceptions."""
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def __init__(self, nextapp, throws=(KeyboardInterrupt, SystemExit)):
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self.nextapp = nextapp
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self.throws = throws
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def __call__(self, environ, start_response):
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return _TrappedResponse(
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self.nextapp,
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environ,
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start_response,
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self.throws
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)
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class _TrappedResponse(object):
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response = iter([])
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def __init__(self, nextapp, environ, start_response, throws):
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self.nextapp = nextapp
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self.environ = environ
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self.start_response = start_response
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self.throws = throws
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self.started_response = False
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self.response = self.trap(
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self.nextapp, self.environ, self.start_response)
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self.iter_response = iter(self.response)
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def __iter__(self):
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self.started_response = True
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return self
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if py3k:
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def __next__(self):
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return self.trap(next, self.iter_response)
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else:
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def next(self):
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return self.trap(self.iter_response.next)
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def close(self):
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if hasattr(self.response, 'close'):
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self.response.close()
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def trap(self, func, *args, **kwargs):
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try:
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return func(*args, **kwargs)
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except self.throws:
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raise
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except StopIteration:
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raise
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except:
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tb = _cperror.format_exc()
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#print('trapped (started %s):' % self.started_response, tb)
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_cherrypy.log(tb, severity=40)
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if not _cherrypy.request.show_tracebacks:
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tb = ""
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s, h, b = _cperror.bare_error(tb)
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if py3k:
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# What fun.
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s = s.decode('ISO-8859-1')
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h = [(k.decode('ISO-8859-1'), v.decode('ISO-8859-1'))
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for k, v in h]
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if self.started_response:
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# Empty our iterable (so future calls raise StopIteration)
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self.iter_response = iter([])
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else:
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self.iter_response = iter(b)
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try:
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self.start_response(s, h, _sys.exc_info())
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except:
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# "The application must not trap any exceptions raised by
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# start_response, if it called start_response with exc_info.
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# Instead, it should allow such exceptions to propagate
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# back to the server or gateway."
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# But we still log and call close() to clean up ourselves.
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_cherrypy.log(traceback=True, severity=40)
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raise
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if self.started_response:
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return ntob("").join(b)
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else:
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return b
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# WSGI-to-CP Adapter #
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class AppResponse(object):
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"""WSGI response iterable for CherryPy applications."""
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def __init__(self, environ, start_response, cpapp):
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self.cpapp = cpapp
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try:
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if not py3k:
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if environ.get(ntou('wsgi.version')) == (ntou('u'), 0):
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environ = downgrade_wsgi_ux_to_1x(environ)
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self.environ = environ
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self.run()
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r = _cherrypy.serving.response
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outstatus = r.output_status
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if not isinstance(outstatus, bytestr):
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raise TypeError("response.output_status is not a byte string.")
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outheaders = []
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for k, v in r.header_list:
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if not isinstance(k, bytestr):
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raise TypeError(
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"response.header_list key %r is not a byte string." %
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k)
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if not isinstance(v, bytestr):
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raise TypeError(
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"response.header_list value %r is not a byte string." %
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v)
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outheaders.append((k, v))
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if py3k:
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# According to PEP 3333, when using Python 3, the response
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# status and headers must be bytes masquerading as unicode;
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# that is, they must be of type "str" but are restricted to
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# code points in the "latin-1" set.
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outstatus = outstatus.decode('ISO-8859-1')
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outheaders = [(k.decode('ISO-8859-1'), v.decode('ISO-8859-1'))
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for k, v in outheaders]
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self.iter_response = iter(r.body)
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self.write = start_response(outstatus, outheaders)
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except:
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self.close()
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raise
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def __iter__(self):
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return self
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if py3k:
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def __next__(self):
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return next(self.iter_response)
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else:
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def next(self):
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return self.iter_response.next()
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def close(self):
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"""Close and de-reference the current request and response. (Core)"""
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self.cpapp.release_serving()
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def run(self):
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"""Create a Request object using environ."""
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env = self.environ.get
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local = httputil.Host('', int(env('SERVER_PORT', 80)),
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env('SERVER_NAME', ''))
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remote = httputil.Host(env('REMOTE_ADDR', ''),
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int(env('REMOTE_PORT', -1) or -1),
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env('REMOTE_HOST', ''))
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scheme = env('wsgi.url_scheme')
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sproto = env('ACTUAL_SERVER_PROTOCOL', "HTTP/1.1")
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request, resp = self.cpapp.get_serving(local, remote, scheme, sproto)
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# LOGON_USER is served by IIS, and is the name of the
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# user after having been mapped to a local account.
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# Both IIS and Apache set REMOTE_USER, when possible.
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request.login = env('LOGON_USER') or env('REMOTE_USER') or None
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request.multithread = self.environ['wsgi.multithread']
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request.multiprocess = self.environ['wsgi.multiprocess']
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request.wsgi_environ = self.environ
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request.prev = env('cherrypy.previous_request', None)
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meth = self.environ['REQUEST_METHOD']
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path = httputil.urljoin(self.environ.get('SCRIPT_NAME', ''),
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self.environ.get('PATH_INFO', ''))
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qs = self.environ.get('QUERY_STRING', '')
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if py3k:
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# This isn't perfect; if the given PATH_INFO is in the
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# wrong encoding, it may fail to match the appropriate config
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# section URI. But meh.
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old_enc = self.environ.get('wsgi.url_encoding', 'ISO-8859-1')
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new_enc = self.cpapp.find_config(self.environ.get('PATH_INFO', ''),
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"request.uri_encoding", 'utf-8')
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if new_enc.lower() != old_enc.lower():
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# Even though the path and qs are unicode, the WSGI server
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# is required by PEP 3333 to coerce them to ISO-8859-1
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# masquerading as unicode. So we have to encode back to
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# bytes and then decode again using the "correct" encoding.
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try:
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u_path = path.encode(old_enc).decode(new_enc)
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u_qs = qs.encode(old_enc).decode(new_enc)
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except (UnicodeEncodeError, UnicodeDecodeError):
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# Just pass them through without transcoding and hope.
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pass
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else:
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# Only set transcoded values if they both succeed.
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path = u_path
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qs = u_qs
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rproto = self.environ.get('SERVER_PROTOCOL')
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headers = self.translate_headers(self.environ)
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rfile = self.environ['wsgi.input']
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request.run(meth, path, qs, rproto, headers, rfile)
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headerNames = {'HTTP_CGI_AUTHORIZATION': 'Authorization',
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'CONTENT_LENGTH': 'Content-Length',
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'CONTENT_TYPE': 'Content-Type',
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'REMOTE_HOST': 'Remote-Host',
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'REMOTE_ADDR': 'Remote-Addr',
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}
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def translate_headers(self, environ):
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"""Translate CGI-environ header names to HTTP header names."""
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for cgiName in environ:
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# We assume all incoming header keys are uppercase already.
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if cgiName in self.headerNames:
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yield self.headerNames[cgiName], environ[cgiName]
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elif cgiName[:5] == "HTTP_":
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# Hackish attempt at recovering original header names.
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translatedHeader = cgiName[5:].replace("_", "-")
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yield translatedHeader, environ[cgiName]
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class CPWSGIApp(object):
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"""A WSGI application object for a CherryPy Application."""
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pipeline = [('ExceptionTrapper', ExceptionTrapper),
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('InternalRedirector', InternalRedirector),
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]
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"""A list of (name, wsgiapp) pairs. Each 'wsgiapp' MUST be a
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constructor that takes an initial, positional 'nextapp' argument,
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plus optional keyword arguments, and returns a WSGI application
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(that takes environ and start_response arguments). The 'name' can
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be any you choose, and will correspond to keys in self.config."""
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head = None
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"""Rather than nest all apps in the pipeline on each call, it's only
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done the first time, and the result is memoized into self.head. Set
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this to None again if you change self.pipeline after calling self."""
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config = {}
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"""A dict whose keys match names listed in the pipeline. Each
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value is a further dict which will be passed to the corresponding
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named WSGI callable (from the pipeline) as keyword arguments."""
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response_class = AppResponse
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"""The class to instantiate and return as the next app in the WSGI chain.
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"""
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def __init__(self, cpapp, pipeline=None):
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self.cpapp = cpapp
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self.pipeline = self.pipeline[:]
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if pipeline:
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self.pipeline.extend(pipeline)
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self.config = self.config.copy()
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def tail(self, environ, start_response):
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"""WSGI application callable for the actual CherryPy application.
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You probably shouldn't call this; call self.__call__ instead,
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so that any WSGI middleware in self.pipeline can run first.
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"""
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return self.response_class(environ, start_response, self.cpapp)
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def __call__(self, environ, start_response):
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head = self.head
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if head is None:
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# Create and nest the WSGI apps in our pipeline (in reverse order).
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# Then memoize the result in self.head.
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head = self.tail
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for name, callable in self.pipeline[::-1]:
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conf = self.config.get(name, {})
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head = callable(head, **conf)
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self.head = head
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return head(environ, start_response)
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def namespace_handler(self, k, v):
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"""Config handler for the 'wsgi' namespace."""
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if k == "pipeline":
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# Note this allows multiple 'wsgi.pipeline' config entries
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# (but each entry will be processed in a 'random' order).
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# It should also allow developers to set default middleware
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# in code (passed to self.__init__) that deployers can add to
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# (but not remove) via config.
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self.pipeline.extend(v)
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elif k == "response_class":
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self.response_class = v
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else:
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name, arg = k.split(".", 1)
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bucket = self.config.setdefault(name, {})
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bucket[arg] = v
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