text: # -*- coding: utf-8 -*-
  """
      werkzeug.test
      ~~~~~~~~~~~~~
  
      This module implements a client to WSGI applications for testing.
  
      :copyright: 2007 Pallets
      :license: BSD-3-Clause
  """
  import mimetypes
  import sys
  from io import BytesIO
  from itertools import chain
  from random import random
  from tempfile import TemporaryFile
  from time import time
  
  from ._compat import iteritems
  from ._compat import iterlists
  from ._compat import itervalues
  from ._compat import make_literal_wrapper
  from ._compat import reraise
  from ._compat import string_types
  from ._compat import text_type
  from ._compat import to_bytes
  from ._compat import wsgi_encoding_dance
  from ._internal import _get_environ
  from .datastructures import CallbackDict
  from .datastructures import CombinedMultiDict
  from .datastructures import EnvironHeaders
  from .datastructures import FileMultiDict
  from .datastructures import FileStorage
  from .datastructures import Headers
  from .datastructures import MultiDict
  from .http import dump_cookie
  from .http import dump_options_header
  from .http import parse_options_header
  from .urls import iri_to_uri
  from .urls import url_encode
  from .urls import url_fix
  from .urls import url_parse
  from .urls import url_unparse
  from .urls import url_unquote
  from .utils import get_content_type
  from .wrappers import BaseRequest
  from .wsgi import ClosingIterator
  from .wsgi import get_current_url
  
  try:
      from urllib.request import Request as U2Request
  except ImportError:
      from urllib2 import Request as U2Request
  
  try:
      from http.cookiejar import CookieJar
  except ImportError:
      from cookielib import CookieJar
  
  
  def stream_encode_multipart(
      values, use_tempfile=True, threshold=1024 * 500, boundary=None, charset="utf-8"
  ):
      """Encode a dict of values (either strings or file descriptors or
      :class:`FileStorage` objects.) into a multipart encoded string stored
      in a file descriptor.
      """
      if boundary is None:
          boundary = "---------------WerkzeugFormPart_%s%s" % (time(), random())
      _closure = [BytesIO(), 0, False]
  
      if use_tempfile:
  
          def write_binary(string):
              stream, total_length, on_disk = _closure
              if on_disk:
                  stream.write(string)
              else:
                  length = len(string)
                  if length + _closure[1] <= threshold:
                      stream.write(string)
                  else:
                      new_stream = TemporaryFile("wb+")
                      new_stream.write(stream.getvalue())
                      new_stream.write(string)
                      _closure[0] = new_stream
                      _closure[2] = True
                  _closure[1] = total_length + length
  
      else:
          write_binary = _closure[0].write
  
      def write(string):
          write_binary(string.encode(charset))
  
      if not isinstance(values, MultiDict):
          values = MultiDict(values)
  
      for key, values in iterlists(values):
          for value in values:
              write('--%s\r\nContent-Disposition: form-data; name="%s"' % (boundary, key))
              reader = getattr(value, "read", None)
              if reader is not None:
                  filename = getattr(value, "filename", getattr(value, "name", None))
                  content_type = getattr(value, "content_type", None)
                  if content_type is None:
                      content_type = (
                          filename
                          and mimetypes.guess_type(filename)[0]
                          or "application/octet-stream"
                      )
                  if filename is not None:
                      write('; filename="%s"\r\n' % filename)
                  else:
                      write("\r\n")
                  write("Content-Type: %s\r\n\r\n" % content_type)
                  while 1:
                      chunk = reader(16384)
                      if not chunk:
                          break
                      write_binary(chunk)
              else:
                  if not isinstance(value, string_types):
                      value = str(value)
  
                  value = to_bytes(value, charset)
                  write("\r\n\r\n")
                  write_binary(value)
              write("\r\n")
      write("--%s--\r\n" % boundary)
  
      length = int(_closure[0].tell())
      _closure[0].seek(0)
      return _closure[0], length, boundary
  
  
  def encode_multipart(values, boundary=None, charset="utf-8"):
      """Like `stream_encode_multipart` but returns a tuple in the form
      (``boundary``, ``data``) where data is a bytestring.
      """
      stream, length, boundary = stream_encode_multipart(
          values, use_tempfile=False, boundary=boundary, charset=charset
      )
      return boundary, stream.read()
  
  
  def File(fd, filename=None, mimetype=None):
      """Backwards compat.
  
      .. deprecated:: 0.5
      """
      from warnings import warn
  
      warn(
          "'werkzeug.test.File' is deprecated as of version 0.5 and will"
          " be removed in version 1.0. Use 'EnvironBuilder' or"
          " 'FileStorage' instead.",
          DeprecationWarning,
          stacklevel=2,
      )
      return FileStorage(fd, filename=filename, content_type=mimetype)
  
  
  class _TestCookieHeaders(object):
  
      """A headers adapter for cookielib
      """
  
      def __init__(self, headers):
          self.headers = headers
  
      def getheaders(self, name):
          headers = []
          name = name.lower()
          for k, v in self.headers:
              if k.lower() == name:
                  headers.append(v)
          return headers
  
      def get_all(self, name, default=None):
          rv = []
          for k, v in self.headers:
              if k.lower() == name.lower():
                  rv.append(v)
          return rv or default or []
  
  
  class _TestCookieResponse(object):
  
      """Something that looks like a httplib.HTTPResponse, but is actually just an
      adapter for our test responses to make them available for cookielib.
      """
  
      def __init__(self, headers):
          self.headers = _TestCookieHeaders(headers)
  
      def info(self):
          return self.headers
  
  
  class _TestCookieJar(CookieJar):
  
      """A cookielib.CookieJar modified to inject and read cookie headers from
      and to wsgi environments, and wsgi application responses.
      """
  
      def inject_wsgi(self, environ):
          """Inject the cookies as client headers into the server's wsgi
          environment.
          """
          cvals = ["%s=%s" % (c.name, c.value) for c in self]
  
          if cvals:
              environ["HTTP_COOKIE"] = "; ".join(cvals)
          else:
              environ.pop("HTTP_COOKIE", None)
  
      def extract_wsgi(self, environ, headers):
          """Extract the server's set-cookie headers as cookies into the
          cookie jar.
          """
          self.extract_cookies(
              _TestCookieResponse(headers), U2Request(get_current_url(environ))
          )
  
  
  def _iter_data(data):
      """Iterates over a `dict` or :class:`MultiDict` yielding all keys and
      values.
      This is used to iterate over the data passed to the
      :class:`EnvironBuilder`.
      """
      if isinstance(data, MultiDict):
          for key, values in iterlists(data):
              for value in values:
                  yield key, value
      else:
          for key, values in iteritems(data):
              if isinstance(values, list):
                  for value in values:
                      yield key, value
              else:
                  yield key, values
  
  
  class EnvironBuilder(object):
      """This class can be used to conveniently create a WSGI environment
      for testing purposes.  It can be used to quickly create WSGI environments
      or request objects from arbitrary data.
  
      The signature of this class is also used in some other places as of
      Werkzeug 0.5 (:func:`create_environ`, :meth:`BaseResponse.from_values`,
      :meth:`Client.open`).  Because of this most of the functionality is
      available through the constructor alone.
  
      Files and regular form data can be manipulated independently of each
      other with the :attr:`form` and :attr:`files` attributes, but are
      passed with the same argument to the constructor: `data`.
  
      `data` can be any of these values:
  
      -   a `str` or `bytes` object: The object is converted into an
          :attr:`input_stream`, the :attr:`content_length` is set and you have to
          provide a :attr:`content_type`.
      -   a `dict` or :class:`MultiDict`: The keys have to be strings. The values
          have to be either any of the following objects, or a list of any of the
          following objects:
  
          -   a :class:`file`-like object:  These are converted into
              :class:`FileStorage` objects automatically.
          -   a `tuple`:  The :meth:`~FileMultiDict.add_file` method is called
              with the key and the unpacked `tuple` items as positional
              arguments.
          -   a `str`:  The string is set as form data for the associated key.
      -   a file-like object: The object content is loaded in memory and then
          handled like a regular `str` or a `bytes`.
  
      :param path: the path of the request.  In the WSGI environment this will
                   end up as `PATH_INFO`.  If the `query_string` is not defined
                   and there is a question mark in the `path` everything after
                   it is used as query string.
      :param base_url: the base URL is a URL that is used to extract the WSGI
                       URL scheme, host (server name + server port) and the
                       script root (`SCRIPT_NAME`).
      :param query_string: an optional string or dict with URL parameters.
      :param method: the HTTP method to use, defaults to `GET`.
      :param input_stream: an optional input stream.  Do not specify this and
                           `data`.  As soon as an input stream is set you can't
                           modify :attr:`args` and :attr:`files` unless you
                           set the :attr:`input_stream` to `None` again.
      :param content_type: The content type for the request.  As of 0.5 you
                           don't have to provide this when specifying files
                           and form data via `data`.
      :param content_length: The content length for the request.  You don't
                             have to specify this when providing data via
                             `data`.
      :param errors_stream: an optional error stream that is used for
                            `wsgi.errors`.  Defaults to :data:`stderr`.
      :param multithread: controls `wsgi.multithread`.  Defaults to `False`.
      :param multiprocess: controls `wsgi.multiprocess`.  Defaults to `False`.
      :param run_once: controls `wsgi.run_once`.  Defaults to `False`.
      :param headers: an optional list or :class:`Headers` object of headers.
      :param data: a string or dict of form data or a file-object.
                   See explanation above.
      :param json: An object to be serialized and assigned to ``data``.
          Defaults the content type to ``"application/json"``.
          Serialized with the function assigned to :attr:`json_dumps`.
      :param environ_base: an optional dict of environment defaults.
      :param environ_overrides: an optional dict of environment overrides.
      :param charset: the charset used to encode unicode data.
  
      .. versionadded:: 0.15
          The ``json`` param and :meth:`json_dumps` method.
  
      .. versionadded:: 0.15
          The environ has keys ``REQUEST_URI`` and ``RAW_URI`` containing
          the path before perecent-decoding. This is not part of the WSGI
          PEP, but many WSGI servers include it.
  
      .. versionchanged:: 0.6
         ``path`` and ``base_url`` can now be unicode strings that are
         encoded with :func:`iri_to_uri`.
      """
  
      #: the server protocol to use.  defaults to HTTP/1.1
      server_protocol = "HTTP/1.1"
  
      #: the wsgi version to use.  defaults to (1, 0)
      wsgi_version = (1, 0)
  
      #: the default request class for :meth:`get_request`
      request_class = BaseRequest
  
      import json
  
      #: The serialization function used when ``json`` is passed.
      json_dumps = staticmethod(json.dumps)
      del json
  
      def __init__(
          self,
          path="/",
          base_url=None,
          query_string=None,
          method="GET",
          input_stream=None,
          content_type=None,
          content_length=None,
          errors_stream=None,
          multithread=False,
          multiprocess=False,
          run_once=False,
          headers=None,
          data=None,
          environ_base=None,
          environ_overrides=None,
          charset="utf-8",
          mimetype=None,
          json=None,
      ):
          path_s = make_literal_wrapper(path)
          if query_string is not None and path_s("?") in path:
              raise ValueError("Query string is defined in the path and as an argument")
          if query_string is None and path_s("?") in path:
              path, query_string = path.split(path_s("?"), 1)
          self.charset = charset
          self.path = iri_to_uri(path)
          if base_url is not None:
              base_url = url_fix(iri_to_uri(base_url, charset), charset)
          self.base_url = base_url
          if isinstance(query_string, (bytes, text_type)):
              self.query_string = query_string
          else:
              if query_string is None:
                  query_string = MultiDict()
              elif not isinstance(query_string, MultiDict):
                  query_string = MultiDict(query_string)
              self.args = query_string
          self.method = method
          if headers is None:
              headers = Headers()
          elif not isinstance(headers, Headers):
              headers = Headers(headers)
          self.headers = headers
          if content_type is not None:
              self.content_type = content_type
          if errors_stream is None:
              errors_stream = sys.stderr
          self.errors_stream = errors_stream
          self.multithread = multithread
          self.multiprocess = multiprocess
          self.run_once = run_once
          self.environ_base = environ_base
          self.environ_overrides = environ_overrides
          self.input_stream = input_stream
          self.content_length = content_length
          self.closed = False
  
          if json is not None:
              if data is not None:
                  raise TypeError("can't provide both json and data")
  
              data = self.json_dumps(json)
  
              if self.content_type is None:
                  self.content_type = "application/json"
  
          if data:
              if input_stream is not None:
                  raise TypeError("can't provide input stream and data")
              if hasattr(data, "read"):
                  data = data.read()
              if isinstance(data, text_type):
                  data = data.encode(self.charset)
              if isinstance(data, bytes):
                  self.input_stream = BytesIO(data)
                  if self.content_length is None:
                      self.content_length = len(data)
              else:
                  for key, value in _iter_data(data):
                      if isinstance(value, (tuple, dict)) or hasattr(value, "read"):
                          self._add_file_from_data(key, value)
                      else:
                          self.form.setlistdefault(key).append(value)
  
          if mimetype is not None:
              self.mimetype = mimetype
  
      @classmethod
      def from_environ(cls, environ, **kwargs):
          """Turn an environ dict back into a builder. Any extra kwargs
          override the args extracted from the environ.
  
          .. versionadded:: 0.15
          """
          headers = Headers(EnvironHeaders(environ))
          out = {
              "path": environ["PATH_INFO"],
              "base_url": cls._make_base_url(
                  environ["wsgi.url_scheme"], headers.pop("Host"), environ["SCRIPT_NAME"]
              ),
              "query_string": environ["QUERY_STRING"],
              "method": environ["REQUEST_METHOD"],
              "input_stream": environ["wsgi.input"],
              "content_type": headers.pop("Content-Type", None),
              "content_length": headers.pop("Content-Length", None),
              "errors_stream": environ["wsgi.errors"],
              "multithread": environ["wsgi.multithread"],
              "multiprocess": environ["wsgi.multiprocess"],
              "run_once": environ["wsgi.run_once"],
              "headers": headers,
          }
          out.update(kwargs)
          return cls(**out)
  
      def _add_file_from_data(self, key, value):
          """Called in the EnvironBuilder to add files from the data dict."""
          if isinstance(value, tuple):
              self.files.add_file(key, *value)
          elif isinstance(value, dict):
              from warnings import warn
  
              warn(
                  "Passing a dict as file data is deprecated as of"
                  " version 0.5 and will be removed in version 1.0. Use"
                  " a tuple or 'FileStorage' object instead.",
                  DeprecationWarning,
                  stacklevel=2,
              )
              value = dict(value)
              mimetype = value.pop("mimetype", None)
              if mimetype is not None:
                  value["content_type"] = mimetype
              self.files.add_file(key, **value)
          else:
              self.files.add_file(key, value)
  
      @staticmethod
      def _make_base_url(scheme, host, script_root):
          return url_unparse((scheme, host, script_root, "", "")).rstrip("/") + "/"
  
      @property
      def base_url(self):
          """The base URL is used to extract the URL scheme, host name,
          port, and root path.
          """
          return self._make_base_url(self.url_scheme, self.host, self.script_root)
  
      @base_url.setter
      def base_url(self, value):
          if value is None:
              scheme = "http"
              netloc = "10.0.0.7"
              script_root = ""
          else:
              scheme, netloc, script_root, qs, anchor = url_parse(value)
              if qs or anchor:
                  raise ValueError("base url must not contain a query string or fragment")
          self.script_root = script_root.rstrip("/")
          self.host = netloc
          self.url_scheme = scheme
  
      def _get_content_type(self):
          ct = self.headers.get("Content-Type")
          if ct is None and not self._input_stream:
              if self._files:
                  return "multipart/form-data"
              elif self._form:
                  return "application/x-www-form-urlencoded"
              return None
          return ct
  
      def _set_content_type(self, value):
          if value is None:
              self.headers.pop("Content-Type", None)
          else:
              self.headers["Content-Type"] = value
  
      content_type = property(
          _get_content_type,
          _set_content_type,
          doc="""The content type for the request.  Reflected from and to
          the :attr:`headers`.  Do not set if you set :attr:`files` or
          :attr:`form` for auto detection.""",
      )
      del _get_content_type, _set_content_type
  
      def _get_content_length(self):
          return self.headers.get("Content-Length", type=int)
  
      def _get_mimetype(self):
          ct = self.content_type
          if ct:
              return ct.split(";")[0].strip()
  
      def _set_mimetype(self, value):
          self.content_type = get_content_type(value, self.charset)
  
      def _get_mimetype_params(self):
          def on_update(d):
              self.headers["Content-Type"] = dump_options_header(self.mimetype, d)
  
          d = parse_options_header(self.headers.get("content-type", ""))[1]
          return CallbackDict(d, on_update)
  
      mimetype = property(
          _get_mimetype,
          _set_mimetype,
          doc="""The mimetype (content type without charset etc.)
  
          .. versionadded:: 0.14
      """,
      )
      mimetype_params = property(
          _get_mimetype_params,
          doc=""" The mimetype parameters as dict.  For example if the
          content type is ``text/html; charset=utf-8`` the params would be
          ``{'charset': 'utf-8'}``.
  
          .. versionadded:: 0.14
          """,
      )
      del _get_mimetype, _set_mimetype, _get_mimetype_params
  
      def _set_content_length(self, value):
          if value is None:
              self.headers.pop("Content-Length", None)
          else:
              self.headers["Content-Length"] = str(value)
  
      content_length = property(
          _get_content_length,
          _set_content_length,
          doc="""The content length as integer.  Reflected from and to the
          :attr:`headers`.  Do not set if you set :attr:`files` or
          :attr:`form` for auto detection.""",
      )
      del _get_content_length, _set_content_length
  
      def form_property(name, storage, doc):  # noqa: B902
          key = "_" + name
  
          def getter(self):
              if self._input_stream is not None:
                  raise AttributeError("an input stream is defined")
              rv = getattr(self, key)
              if rv is None:
                  rv = storage()
                  setattr(self, key, rv)
  
              return rv
  
          def setter(self, value):
              self._input_stream = None
              setattr(self, key, value)
  
          return property(getter, setter, doc=doc)
  
      form = form_property("form", MultiDict, doc="A :class:`MultiDict` of form values.")
      files = form_property(
          "files",
          FileMultiDict,
          doc="""A :class:`FileMultiDict` of uploaded files.  You can use
          the :meth:`~FileMultiDict.add_file` method to add new files to
          the dict.""",
      )
      del form_property
  
      def _get_input_stream(self):
          return self._input_stream
  
      def _set_input_stream(self, value):
          self._input_stream = value
          self._form = self._files = None
  
      input_stream = property(
          _get_input_stream,
          _set_input_stream,
          doc="""An optional input stream.  If you set this it will clear
          :attr:`form` and :attr:`files`.""",
      )
      del _get_input_stream, _set_input_stream
  
      def _get_query_string(self):
          if self._query_string is None:
              if self._args is not None:
                  return url_encode(self._args, charset=self.charset)
              return ""
          return self._query_string
  
      def _set_query_string(self, value):
          self._query_string = value
          self._args = None
  
      query_string = property(
          _get_query_string,
          _set_query_string,
          doc="""The query string.  If you set this to a string
          :attr:`args` will no longer be available.""",
      )
      del _get_query_string, _set_query_string
  
      def _get_args(self):
          if self._query_string is not None:
              raise AttributeError("a query string is defined")
          if self._args is None:
              self._args = MultiDict()
          return self._args
  
      def _set_args(self, value):
          self._query_string = None
          self._args = value
  
      args = property(
          _get_args, _set_args, doc="The URL arguments as :class:`MultiDict`."
      )
      del _get_args, _set_args
  
      @property
      def server_name(self):
          """The server name (read-only, use :attr:`host` to set)"""
          return self.host.split(":", 1)[0]
  
      @property
      def server_port(self):
          """The server port as integer (read-only, use :attr:`host` to set)"""
          pieces = self.host.split(":", 1)
          if len(pieces) == 2 and pieces[1].isdigit():
              return int(pieces[1])
          elif self.url_scheme == "https":
              return 443
          return 80
  
      def __del__(self):
          try:
              self.close()
          except Exception:
              pass
  
      def close(self):
          """Closes all files.  If you put real :class:`file` objects into the
          :attr:`files` dict you can call this method to automatically close
          them all in one go.
          """
          if self.closed:
              return
          try:
              files = itervalues(self.files)
          except AttributeError:
              files = ()
          for f in files:
              try:
                  f.close()
              except Exception:
                  pass
          self.closed = True
  
      def get_environ(self):
          """Return the built environ.
  
          .. versionchanged:: 0.15
              The content type and length headers are set based on
              input stream detection. Previously this only set the WSGI
              keys.
          """
          input_stream = self.input_stream
          content_length = self.content_length
  
          mimetype = self.mimetype
          content_type = self.content_type
  
          if input_stream is not None:
              start_pos = input_stream.tell()
              input_stream.seek(0, 2)
              end_pos = input_stream.tell()
              input_stream.seek(start_pos)
              content_length = end_pos - start_pos
          elif mimetype == "multipart/form-data":
              values = CombinedMultiDict([self.form, self.files])
              input_stream, content_length, boundary = stream_encode_multipart(
                  values, charset=self.charset
              )
              content_type = mimetype + '; boundary="%s"' % boundary
          elif mimetype == "application/x-www-form-urlencoded":
              # XXX: py2v3 review
              values = url_encode(self.form, charset=self.charset)
              values = values.encode("ascii")
              content_length = len(values)
              input_stream = BytesIO(values)
          else:
              input_stream = BytesIO()
  
          result = {}
          if self.environ_base:
              result.update(self.environ_base)
  
          def _path_encode(x):
              return wsgi_encoding_dance(url_unquote(x, self.charset), self.charset)
  
          qs = wsgi_encoding_dance(self.query_string)
  
          result.update(
              {
                  "REQUEST_METHOD": self.method,
                  "SCRIPT_NAME": _path_encode(self.script_root),
                  "PATH_INFO": _path_encode(self.path),
                  "QUERY_STRING": qs,
                  # Non-standard, added by mod_wsgi, uWSGI
                  "REQUEST_URI": wsgi_encoding_dance(self.path),
                  # Non-standard, added by gunicorn
                  "RAW_URI": wsgi_encoding_dance(self.path),
                  "SERVER_NAME": self.server_name,
                  "SERVER_PORT": str(self.server_port),
                  "HTTP_HOST": self.host,
                  "SERVER_PROTOCOL": self.server_protocol,
                  "wsgi.version": self.wsgi_version,
                  "wsgi.url_scheme": self.url_scheme,
                  "wsgi.input": input_stream,
                  "wsgi.errors": self.errors_stream,
                  "wsgi.multithread": self.multithread,
                  "wsgi.multiprocess": self.multiprocess,
                  "wsgi.run_once": self.run_once,
              }
          )
  
          headers = self.headers.copy()
  
          if content_type is not None:
              result["CONTENT_TYPE"] = content_type
              headers.set("Content-Type", content_type)
  
          if content_length is not None:
              result["CONTENT_LENGTH"] = str(content_length)
              headers.set("Content-Length", content_length)
  
          for key, value in headers.to_wsgi_list():
              result["HTTP_%s" % key.upper().replace("-", "_")] = value
  
          if self.environ_overrides:
              result.update(self.environ_overrides)
  
          return result
  
      def get_request(self, cls=None):
          """Returns a request with the data.  If the request class is not
          specified :attr:`request_class` is used.
  
          :param cls: The request wrapper to use.
          """
          if cls is None:
              cls = self.request_class
          return cls(self.get_environ())
  
  
  class ClientRedirectError(Exception):
      """If a redirect loop is detected when using follow_redirects=True with
      the :cls:`Client`, then this exception is raised.
      """
  
  
  class Client(object):
      """This class allows you to send requests to a wrapped application.
  
      The response wrapper can be a class or factory function that takes
      three arguments: app_iter, status and headers.  The default response
      wrapper just returns a tuple.
  
      Example::
  
          class ClientResponse(BaseResponse):
              ...
  
          client = Client(MyApplication(), response_wrapper=ClientResponse)
  
      The use_cookies parameter indicates whether cookies should be stored and
      sent for subsequent requests. This is True by default, but passing False
      will disable this behaviour.
  
      If you want to request some subdomain of your application you may set
      `allow_subdomain_redirects` to `True` as if not no external redirects
      are allowed.
  
      .. versionadded:: 0.5
         `use_cookies` is new in this version.  Older versions did not provide
         builtin cookie support.
  
      .. versionadded:: 0.14
         The `mimetype` parameter was added.
  
      .. versionadded:: 0.15
          The ``json`` parameter.
      """
  
      def __init__(
          self,
          application,
          response_wrapper=None,
          use_cookies=True,
          allow_subdomain_redirects=False,
      ):
          self.application = application
          self.response_wrapper = response_wrapper
          if use_cookies:
              self.cookie_jar = _TestCookieJar()
          else:
              self.cookie_jar = None
          self.allow_subdomain_redirects = allow_subdomain_redirects
  
      def set_cookie(
          self,
          server_name,
          key,
          value="",
          max_age=None,
          expires=None,
          path="/",
          domain=None,
          secure=None,
          httponly=False,
          charset="utf-8",
      ):
          """Sets a cookie in the client's cookie jar.  The server name
          is required and has to match the one that is also passed to
          the open call.
          """
          assert self.cookie_jar is not None, "cookies disabled"
          header = dump_cookie(
              key, value, max_age, expires, path, domain, secure, httponly, charset
          )
          environ = create_environ(path, base_url="http://" + server_name)
          headers = [("Set-Cookie", header)]
          self.cookie_jar.extract_wsgi(environ, headers)
  
      def delete_cookie(self, server_name, key, path="/", domain=None):
          """Deletes a cookie in the test client."""
          self.set_cookie(
              server_name, key, expires=0, max_age=0, path=path, domain=domain
          )
  
      def run_wsgi_app(self, environ, buffered=False):
          """Runs the wrapped WSGI app with the given environment."""
          if self.cookie_jar is not None:
              self.cookie_jar.inject_wsgi(environ)
          rv = run_wsgi_app(self.application, environ, buffered=buffered)
          if self.cookie_jar is not None:
              self.cookie_jar.extract_wsgi(environ, rv[2])
          return rv
  
      def resolve_redirect(self, response, new_location, environ, buffered=False):
          """Perform a new request to the location given by the redirect
          response to the previous request.
          """
          scheme, netloc, path, qs, anchor = url_parse(new_location)
          builder = EnvironBuilder.from_environ(environ, query_string=qs)
  
          to_name_parts = netloc.split(":", 1)[0].split(".")
          from_name_parts = builder.server_name.split(".")
  
          if to_name_parts != [""]:
              # The new location has a host, use it for the base URL.
              builder.url_scheme = scheme
              builder.host = netloc
          else:
              # A local redirect with autocorrect_location_header=False
              # doesn't have a host, so use the request's host.
              to_name_parts = from_name_parts
  
          # Explain why a redirect to a different server name won't be followed.
          if to_name_parts != from_name_parts:
              if to_name_parts[-len(from_name_parts) :] == from_name_parts:
                  if not self.allow_subdomain_redirects:
                      raise RuntimeError("Following subdomain redirects is not enabled.")
              else:
                  raise RuntimeError("Following external redirects is not supported.")
  
          path_parts = path.split("/")
          root_parts = builder.script_root.split("/")
  
          if path_parts[: len(root_parts)] == root_parts:
              # Strip the script root from the path.
              builder.path = path[len(builder.script_root) :]
          else:
              # The new location is not under the script root, so use the
              # whole path and clear the previous root.
              builder.path = path
              builder.script_root = ""
  
          status_code = int(response[1].split(None, 1)[0])
  
          # Only 307 and 308 preserve all of the original request.
          if status_code not in {307, 308}:
              # HEAD is preserved, everything else becomes GET.
              if builder.method != "HEAD":
                  builder.method = "GET"
  
              # Clear the body and the headers that describe it.
              builder.input_stream = None
              builder.content_type = None
              builder.content_length = None
              builder.headers.pop("Transfer-Encoding", None)
  
          # Disable the response wrapper while handling redirects. Not
          # thread safe, but the client should not be shared anyway.
          old_response_wrapper = self.response_wrapper
          self.response_wrapper = None
  
          try:
              return self.open(builder, as_tuple=True, buffered=buffered)
          finally:
              self.response_wrapper = old_response_wrapper
  
      def open(self, *args, **kwargs):
          """Takes the same arguments as the :class:`EnvironBuilder` class with
          some additions:  You can provide a :class:`EnvironBuilder` or a WSGI
          environment as only argument instead of the :class:`EnvironBuilder`
          arguments and two optional keyword arguments (`as_tuple`, `buffered`)
          that change the type of the return value or the way the application is
          executed.
  
          .. versionchanged:: 0.5
             If a dict is provided as file in the dict for the `data` parameter
             the content type has to be called `content_type` now instead of
             `mimetype`.  This change was made for consistency with
             :class:`werkzeug.FileWrapper`.
  
              The `follow_redirects` parameter was added to :func:`open`.
  
          Additional parameters:
  
          :param as_tuple: Returns a tuple in the form ``(environ, result)``
          :param buffered: Set this to True to buffer the application run.
                           This will automatically close the application for
                           you as well.
          :param follow_redirects: Set this to True if the `Client` should
                                   follow HTTP redirects.
          """
          as_tuple = kwargs.pop("as_tuple", False)
          buffered = kwargs.pop("buffered", False)
          follow_redirects = kwargs.pop("follow_redirects", False)
          environ = None
          if not kwargs and len(args) == 1:
              if isinstance(args[0], EnvironBuilder):
                  environ = args[0].get_environ()
              elif isinstance(args[0], dict):
                  environ = args[0]
          if environ is None:
              builder = EnvironBuilder(*args, **kwargs)
              try:
                  environ = builder.get_environ()
              finally:
                  builder.close()
  
          response = self.run_wsgi_app(environ.copy(), buffered=buffered)
  
          # handle redirects
          redirect_chain = []
          while 1:
              status_code = int(response[1].split(None, 1)[0])
              if (
                  status_code not in {301, 302, 303, 305, 307, 308}
                  or not follow_redirects
              ):
                  break
  
              # Exhaust intermediate response bodies to ensure middleware
              # that returns an iterator runs any cleanup code.
              if not buffered:
                  for _ in response[0]:
                      pass
  
              new_location = response[2]["location"]
              new_redirect_entry = (new_location, status_code)
              if new_redirect_entry in redirect_chain:
                  raise ClientRedirectError("loop detected")
              redirect_chain.append(new_redirect_entry)
              environ, response = self.resolve_redirect(
                  response, new_location, environ, buffered=buffered
              )
  
          if self.response_wrapper is not None:
              response = self.response_wrapper(*response)
          if as_tuple:
              return environ, response
          return response
  
      def get(self, *args, **kw):
          """Like open but method is enforced to GET."""
          kw["method"] = "GET"
          return self.open(*args, **kw)
  
      def patch(self, *args, **kw):
          """Like open but method is enforced to PATCH."""
          kw["method"] = "PATCH"
          return self.open(*args, **kw)
  
      def post(self, *args, **kw):
          """Like open but method is enforced to POST."""
          kw["method"] = "POST"
          return self.open(*args, **kw)
  
      def head(self, *args, **kw):
          """Like open but method is enforced to HEAD."""
          kw["method"] = "HEAD"
          return self.open(*args, **kw)
  
      def put(self, *args, **kw):
          """Like open but method is enforced to PUT."""
          kw["method"] = "PUT"
          return self.open(*args, **kw)
  
      def delete(self, *args, **kw):
          """Like open but method is enforced to DELETE."""
          kw["method"] = "DELETE"
          return self.open(*args, **kw)
  
      def options(self, *args, **kw):
          """Like open but method is enforced to OPTIONS."""
          kw["method"] = "OPTIONS"
          return self.open(*args, **kw)
  
      def trace(self, *args, **kw):
          """Like open but method is enforced to TRACE."""
          kw["method"] = "TRACE"
          return self.open(*args, **kw)
  
      def __repr__(self):
          return "<%s %r>" % (self.__class__.__name__, self.application)
  
  
  def create_environ(*args, **kwargs):
      """Create a new WSGI environ dict based on the values passed.  The first
      parameter should be the path of the request which defaults to '/'.  The
      second one can either be an absolute path (in that case the host is
      10.0.0.7:80) or a full path to the request with scheme, netloc port and
      the path to the script.
  
      This accepts the same arguments as the :class:`EnvironBuilder`
      constructor.
  
      .. versionchanged:: 0.5
         This function is now a thin wrapper over :class:`EnvironBuilder` which
         was added in 0.5.  The `headers`, `environ_base`, `environ_overrides`
         and `charset` parameters were added.
      """
      builder = EnvironBuilder(*args, **kwargs)
      try:
          return builder.get_environ()
      finally:
          builder.close()
  
  
  def run_wsgi_app(app, environ, buffered=False):
      """Return a tuple in the form (app_iter, status, headers) of the
      application output.  This works best if you pass it an application that
      returns an iterator all the time.
  
      Sometimes applications may use the `write()` callable returned
      by the `start_response` function.  This tries to resolve such edge
      cases automatically.  But if you don't get the expected output you
      should set `buffered` to `True` which enforces buffering.
  
      If passed an invalid WSGI application the behavior of this function is
      undefined.  Never pass non-conforming WSGI applications to this function.
  
      :param app: the application to execute.
      :param buffered: set to `True` to enforce buffering.
      :return: tuple in the form ``(app_iter, status, headers)``
      """
      environ = _get_environ(environ)
      response = []
      buffer = []
  
      def start_response(status, headers, exc_info=None):
          if exc_info is not None:
              reraise(*exc_info)
          response[:] = [status, headers]
          return buffer.append
  
      app_rv = app(environ, start_response)
      close_func = getattr(app_rv, "close", None)
      app_iter = iter(app_rv)
  
      # when buffering we emit the close call early and convert the
      # application iterator into a regular list
      if buffered:
          try:
              app_iter = list(app_iter)
          finally:
              if close_func is not None:
                  close_func()
  
      # otherwise we iterate the application iter until we have a response, chain
      # the already received data with the already collected data and wrap it in
      # a new `ClosingIterator` if we need to restore a `close` callable from the
      # original return value.
      else:
          for item in app_iter:
              buffer.append(item)
              if response:
                  break
          if buffer:
              app_iter = chain(buffer, app_iter)
          if close_func is not None and app_iter is not app_rv:
              app_iter = ClosingIterator(app_iter, close_func)
  
      return app_iter, response[0], Headers(response[1])
  