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""" This module implements WSGI related helpers adapted from ``werkzeug.wsgi`` :copyright: (c) 2010 by the Werkzeug Team, see AUTHORS for more details. :license: BSD, see LICENSE for more details. """ from __future__ import absolute_import from raven.utils.compat import iteritems, urllib_quote # `get_headers` comes from `werkzeug.datastructures.EnvironHeaders` def get_headers(environ): """ Returns only proper HTTP headers. """ for key, value in iteritems(environ): key = str(key) if key.startswith('HTTP_') and key not in \ ('HTTP_CONTENT_TYPE', 'HTTP_CONTENT_LENGTH'): yield key[5:].replace('_', '-').title(), value elif key in ('CONTENT_TYPE', 'CONTENT_LENGTH'): yield key.replace('_', '-').title(), value def get_environ(environ): """ Returns our whitelisted environment variables. """ for key in ('REMOTE_ADDR', 'SERVER_NAME', 'SERVER_PORT'): if key in environ: yield key, environ[key] # `get_host` comes from `werkzeug.wsgi` def get_host(environ): """Return the real host for the given WSGI environment. This takes care of the `X-Forwarded-Host` header. :param environ: the WSGI environment to get the host of. """ scheme = environ.get('wsgi.url_scheme') if 'HTTP_X_FORWARDED_HOST' in environ: result = environ['HTTP_X_FORWARDED_HOST'] elif 'HTTP_HOST' in environ: result = environ['HTTP_HOST'] else: result = environ['SERVER_NAME'] if (scheme, str(environ['SERVER_PORT'])) not \ in (('https', '443'), ('http', '80')): result += ':' + environ['SERVER_PORT'] if result.endswith(':80') and scheme == 'http': result = result[:-3] elif result.endswith(':443') and scheme == 'https': result = result[:-4] return result # `get_current_url` comes from `werkzeug.wsgi` def get_current_url(environ, root_only=False, strip_querystring=False, host_only=False): """A handy helper function that recreates the full URL for the current request or parts of it. Here an example: >>> from werkzeug import create_environ >>> env = create_environ("/?param=foo", "http://localhost/script") >>> get_current_url(env) 'http://localhost/script/?param=foo' >>> get_current_url(env, root_only=True) 'http://localhost/script/' >>> get_current_url(env, host_only=True) 'http://localhost/' >>> get_current_url(env, strip_querystring=True) 'http://localhost/script/' :param environ: the WSGI environment to get the current URL from. :param root_only: set `True` if you only want the root URL. :param strip_querystring: set to `True` if you don't want the querystring. :param host_only: set to `True` if the host URL should be returned. """ tmp = [environ['wsgi.url_scheme'], '://', get_host(environ)] cat = tmp.append if host_only: return ''.join(tmp) + '/' cat(urllib_quote(environ.get('SCRIPT_NAME', '').rstrip('/'))) if root_only: cat('/') else: cat(urllib_quote('/' + environ.get('PATH_INFO', '').lstrip('/'))) if not strip_querystring: qs = environ.get('QUERY_STRING') if qs: cat('?' + qs) return ''.join(tmp) def get_client_ip(environ): """ Naively yank the first IP address in an X-Forwarded-For header and assume this is correct. Note: Don't use this in security sensitive situations since this value may be forged from a client. """ try: return environ['HTTP_X_FORWARDED_FOR'].split(',')[0].strip() except (KeyError, IndexError): return environ.get('REMOTE_ADDR')
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