Python wsgiref.handlers.format_date_time() Examples

def _get_parameters(self, if_modified_since=None, **kwargs):
        if not self.path_prefix and not self.base:
            raise IOError("No base URL specified.")

        subpath = self.expand_path(**kwargs)
        if subpath:
            path = utils.join_path(self.path_prefix, subpath)
        else:
            path = self.path_prefix

        if path:
            base_url = _join_url(self.base, path)
        else:
            base_url = self.base

        headers = {
            "Cache-Control": "private",
        }

        if if_modified_since:
            headers["If-Modified-Since"] = handlers.format_date_time(
                if_modified_since)

        return base_url, {}, headers, path 

def _get_parameters(self, if_modified_since=None, generation=None, **_):
        """Calculates the params for the request."""
        base_url = self.to_path()

        url_endpoint = ('https://storage.googleapis.com/%s' % base_url)

        headers = self.headers.to_primitive(False)
        headers["Authorization"] = (
            "Bearer " + self._config.server.service_account.oauth_token)
        headers["Cache-Control"] = "private"
        if if_modified_since:
            headers["If-Modified-Since"] = handlers.format_date_time(
                if_modified_since)

        params = {}
        generation = generation or self.generation
        if generation:
            params["generation"] = generation

        return url_endpoint, params, headers, base_url 

def response_headers(self, protocol: str) -> List[Tuple[bytes, bytes]]:
        headers = [(b"date", format_date_time(time()).encode("ascii"))]
        if self.include_server_header:
            headers.append((b"server", f"hypercorn-{protocol}".encode("ascii")))

        for alt_svc_header in self.alt_svc_headers:
            headers.append((b"alt-svc", alt_svc_header.encode()))
        if len(self.alt_svc_headers) == 0 and self._quic_bind:
            from aioquic.h3.connection import H3_ALPN

            for version in H3_ALPN:
                for bind in self._quic_bind:
                    port = int(bind.split(":")[-1])
                    headers.append((b"alt-svc", b'%s=":%d"; ma=3600' % (version.encode(), port)))

        return headers 

def create_url(self):
        url = 'wss://tts-api.xfyun.cn/v2/tts'
        # 生成RFC1123格式的时间戳
        now = datetime.now()
        date = format_date_time(mktime(now.timetuple()))

        # 拼接字符串
        signature_origin = "host: " + "ws-api.xfyun.cn" + "\n"
        signature_origin += "date: " + date + "\n"
        signature_origin += "GET " + "/v2/tts " + "HTTP/1.1"
        # 进行hmac-sha256进行加密
        signature_sha = hmac.new(self.APISecret.encode('utf-8'), signature_origin.encode('utf-8'),
                                 digestmod=hashlib.sha256).digest()
        signature_sha = base64.b64encode(signature_sha).decode(encoding='utf-8')

        authorization_origin = "api_key=\"%s\", algorithm=\"%s\", headers=\"%s\", signature=\"%s\"" % (
            self.APIKey, "hmac-sha256", "host date request-line", signature_sha)
        authorization = base64.b64encode(authorization_origin.encode('utf-8')).decode(encoding='utf-8')
        # 将请求的鉴权参数组合为字典
        v = {
            "authorization": authorization,
            "date": date,
            "host": "ws-api.xfyun.cn"
        }
        # 拼接鉴权参数，生成url
        url = url + '?' + urlencode(v)
        # print("date: ",date)
        # print("v: ",v)
        # 此处打印出建立连接时候的url,参考本demo的时候可取消上方打印的注释，比对相同参数时生成的url与自己代码生成的url是否一致
        # print('websocket url :', url)
        return url 

def basic_headers(self) -> Tuple[Tuple[str, bytes], ...]:
        # HTTP requires these headers in all responses (client would do
        # something different here)
        return (
            ("Date", format_date_time(None).encode("ascii")),
            ("Server", self.ident),
        ) 

def _add_date_header(request):
    current_time = format_date_time(time())
    request.headers['x-ms-date'] = current_time 

def _is_file_changed(self, file_mtime, if_none_match=None, if_modified_since=None):
        # For if_none_match check against what would be the ETAG value
        if if_none_match:
            return repr(file_mtime) != if_none_match

        # For if_modified_since check against file_mtime
        if if_modified_since:
            return if_modified_since != format_date_time(file_mtime)

        # Neither header is provided therefore assume file is changed.
        return True 

def _add_date_header(request):
    current_time = format_date_time(time())
    request.headers['x-ms-date'] = current_time 

def basic_headers(self):
        # HTTP requires these headers in all responses (client would do
        # something different here)
        return [
            ("Date", format_date_time(None).encode("ascii")),
            ("Server", self.ident),
        ] 

def browser_cache(expires=None):
    """Add Flask cache response headers based on expires in seconds.

    If expires is None, caching will be disabled.
    Otherwise, caching headers are set to expire in now + expires seconds

    Example usage:

    ::

        @app.route('/map')
        @browser_cache(expires=60)
        def index():
            return render_template('index.html')

    """
    from wsgiref.handlers import format_date_time
    from flask import g
    from flask_restx.utils import unpack

    def cache_decorator(view):
        @wraps(view)
        def cache_func(*args, **kwargs):

            resp, code, headers = unpack(view(*args, **kwargs))
            now = datetime.datetime.now()

            headers['Last-Modified'] = format_date_time(time.mktime(now.timetuple()))

            failure = code - 200 >= 100  # this is not a successful answer
            do_not_cache = getattr(g, 'DONOTCACHE', False)

            if expires is None or failure or do_not_cache:
                headers['Cache-Control'] = 'no-store, no-cache, must-revalidate, post-check=0, pre-check=0, max-age=0'
            else:
                headers['Cache-Control'] = 'private, max-age={}'.format(expires)

            return resp, code, headers
        return cache_func
    return cache_decorator 

def browser_cache(expires=None):
    """Add Flask cache response headers based on expires in seconds.

    If expires is None, caching will be disabled.
    Otherwise, caching headers are set to expire in now + expires seconds

    Example usage:

    ::

        @app.route('/map')
        @browser_cache(expires=60)
        def index():
            return render_template('index.html')

    """
    from wsgiref.handlers import format_date_time
    from flask import g
    from flask_restx.utils import unpack

    def cache_decorator(view):
        @wraps(view)
        def cache_func(*args, **kwargs):

            resp, code, headers = unpack(view(*args, **kwargs))
            now = datetime.datetime.now()

            headers['Last-Modified'] = format_date_time(time.mktime(now.timetuple()))

            failure = code - 200 >= 100  # this is not a successful answer
            do_not_cache = getattr(g, 'DONOTCACHE', False)

            if expires is None or failure or do_not_cache:
                headers['Cache-Control'] = 'no-store, no-cache, must-revalidate, post-check=0, pre-check=0, max-age=0'
            else:
                headers['Cache-Control'] = 'private, max-age={}'.format(expires)

            return resp, code, headers
        return cache_func
    return cache_decorator 

def browser_cache(expires=None):
    """Add Flask cache response headers based on expires in seconds.

    If expires is None, caching will be disabled.
    Otherwise, caching headers are set to expire in now + expires seconds

    Example usage:

    ::

        @app.route('/map')
        @browser_cache(expires=60)
        def index():
            return render_template('index.html')

    """
    from wsgiref.handlers import format_date_time
    from flask import g
    from flask_restx.utils import unpack

    def cache_decorator(view):
        @wraps(view)
        def cache_func(*args, **kwargs):

            resp, code, headers = unpack(view(*args, **kwargs))
            now = datetime.datetime.now()

            headers['Last-Modified'] = format_date_time(time.mktime(now.timetuple()))

            failure = code - 200 >= 100  # this is not a successful answer
            do_not_cache = getattr(g, 'DONOTCACHE', False)

            if expires is None or failure or do_not_cache:
                headers['Cache-Control'] = 'no-store, no-cache, must-revalidate, post-check=0, pre-check=0, max-age=0'
            else:
                headers['Cache-Control'] = 'private, max-age={}'.format(expires)

            return resp, code, headers
        return cache_func
    return cache_decorator 

def date(self, value: datetime) -> None:
        self.headers["Date"] = format_date_time(value.timestamp()) 

def create_url(self):
        url = 'wss://tts-api.xfyun.cn/v2/tts'
        # 生成RFC1123格式的时间戳
        now = datetime.now()
        date = format_date_time(mktime(now.timetuple()))

        # 拼接字符串
        signature_origin = "host: " + "ws-api.xfyun.cn" + "\n"
        signature_origin += "date: " + date + "\n"
        signature_origin += "GET " + "/v2/tts " + "HTTP/1.1"
        # 进行hmac-sha256进行加密
        signature_sha = hmac.new(self.APISecret.encode('utf-8'), signature_origin.encode('utf-8'),
                                 digestmod=hashlib.sha256).digest()
        signature_sha = base64.b64encode(signature_sha).decode(encoding='utf-8')

        authorization_origin = "api_key=\"%s\", algorithm=\"%s\", headers=\"%s\", signature=\"%s\"" % (
            self.APIKey, "hmac-sha256", "host date request-line", signature_sha)
        authorization = base64.b64encode(authorization_origin.encode('utf-8')).decode(encoding='utf-8')
        # 将请求的鉴权参数组合为字典
        v = {
            "authorization": authorization,
            "date": date,
            "host": "ws-api.xfyun.cn"
        }
        # 拼接鉴权参数，生成url
        url = url + '?' + urlencode(v)
        # print("date: ",date)
        # print("v: ",v)
        # 此处打印出建立连接时候的url,参考本demo的时候可取消上方打印的注释，比对相同参数时生成的url与自己代码生成的url是否一致
        # print('websocket url :', url)
        return url 

def _get_parameters(self, if_modified_since=None):
        base_url = self.to_path()

        url_endpoint = ('https://storage.googleapis.com/%s' %
                        base_url.lstrip("/"))

        headers = {"Cache-Control": "private"}
        if if_modified_since:
            headers["If-Modified-Since"] = handlers.format_date_time(
                if_modified_since)

        return url_endpoint, {}, headers, base_url 

def retry_after(self, value: Union[datetime, int]) -> None:
        if isinstance(value, datetime):
            self.headers["Retry-After"] = format_date_time(value.timestamp())
        else:
            self.headers["Retry-After"] = str(value) 

def last_modified(self, value: datetime) -> None:
        self.headers["Last-Modified"] = format_date_time(value.timestamp()) 

def expires(self, value: datetime) -> None:
        self.headers["Expires"] = format_date_time(value.timestamp()) 

def get_one(self, ref_or_id, file_path, requester_user, if_none_match=None,
                if_modified_since=None):
        """
            Outputs the content of a specific file in a pack.

            Handles requests:
                GET /packs/views/file/<pack_ref_or_id>/<file path>
        """
        pack_db = self._get_by_ref_or_id(ref_or_id=ref_or_id)

        if not pack_db:
            msg = 'Pack with ref_or_id "%s" does not exist' % (ref_or_id)
            raise StackStormDBObjectNotFoundError(msg)

        if not file_path:
            raise ValueError('Missing file path')

        pack_ref = pack_db.ref

        # Note: Until list filtering is in place we don't require RBAC check for icon file
        permission_type = PermissionType.PACK_VIEW
        if file_path not in WHITELISTED_FILE_PATHS:
            rbac_utils = get_rbac_backend().get_utils_class()
            rbac_utils.assert_user_has_resource_db_permission(user_db=requester_user,
                                                              resource_db=pack_db,
                                                              permission_type=permission_type)

        normalized_file_path = get_pack_file_abs_path(pack_ref=pack_ref, file_path=file_path)
        if not normalized_file_path or not os.path.isfile(normalized_file_path):
            # Ignore references to files which don't exist on disk
            raise StackStormDBObjectNotFoundError('File "%s" not found' % (file_path))

        file_size, file_mtime = self._get_file_stats(file_path=normalized_file_path)

        response = Response()

        if not self._is_file_changed(file_mtime,
                                     if_none_match=if_none_match,
                                     if_modified_since=if_modified_since):
            response.status = http_client.NOT_MODIFIED
        else:
            if file_size is not None and file_size > MAX_FILE_SIZE:
                msg = ('File %s exceeds maximum allowed file size (%s bytes)' %
                       (file_path, MAX_FILE_SIZE))
                raise ValueError(msg)

            content_type = mimetypes.guess_type(normalized_file_path)[0] or \
                'application/octet-stream'

            response.headers['Content-Type'] = content_type
            response.body = self._get_file_content(file_path=normalized_file_path)

        response.headers['Last-Modified'] = format_date_time(file_mtime)
        response.headers['ETag'] = repr(file_mtime)

        return response