Python django.utils.http.quote_etag() Examples

The following are 6 code examples of django.utils.http.quote_etag(). You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may also want to check out all available functions/classes of the module django.utils.http , or try the search function .
Example #1
Source File: http.py    From bioforum with MIT License 4 votes vote down vote up 
def condition(etag_func=None, last_modified_func=None):
    """
    Decorator to support conditional retrieval (or change) for a view
    function.

    The parameters are callables to compute the ETag and last modified time for
    the requested resource, respectively. The callables are passed the same
    parameters as the view itself. The ETag function should return a string (or
    None if the resource doesn't exist), while the last_modified function
    should return a datetime object (or None if the resource doesn't exist).

    The ETag function should return a complete ETag, including quotes (e.g.
    '"etag"'), since that's the only way to distinguish between weak and strong
    ETags. If an unquoted ETag is returned (e.g. 'etag'), it will be converted
    to a strong ETag by adding quotes.

    This decorator will either pass control to the wrapped view function or
    return an HTTP 304 response (unmodified) or 412 response (precondition
    failed), depending upon the request method. In either case, the decorator
    will add the generated ETag and Last-Modified headers to the response if
    the headers aren't already set and if the request's method is safe.
    """
    def decorator(func):
        @wraps(func)
        def inner(request, *args, **kwargs):
            # Compute values (if any) for the requested resource.
            def get_last_modified():
                if last_modified_func:
                    dt = last_modified_func(request, *args, **kwargs)
                    if dt:
                        return timegm(dt.utctimetuple())

            # The value from etag_func() could be quoted or unquoted.
            res_etag = etag_func(request, *args, **kwargs) if etag_func else None
            res_etag = quote_etag(res_etag) if res_etag is not None else None
            res_last_modified = get_last_modified()

            response = get_conditional_response(
                request,
                etag=res_etag,
                last_modified=res_last_modified,
            )

            if response is None:
                response = func(request, *args, **kwargs)

            # Set relevant headers on the response if they don't already exist
            # and if the request method is safe.
            if request.method in ('GET', 'HEAD'):
                if res_last_modified and not response.has_header('Last-Modified'):
                    response['Last-Modified'] = http_date(res_last_modified)
                if res_etag and not response.has_header('ETag'):
                    response['ETag'] = res_etag

            return response

        return inner
    return decorator


# Shortcut decorators for common cases based on ETag or Last-Modified only
Example #2
Source File: http.py    From Hands-On-Application-Development-with-PyCharm with MIT License 4 votes vote down vote up 
def condition(etag_func=None, last_modified_func=None):
    """
    Decorator to support conditional retrieval (or change) for a view
    function.

    The parameters are callables to compute the ETag and last modified time for
    the requested resource, respectively. The callables are passed the same
    parameters as the view itself. The ETag function should return a string (or
    None if the resource doesn't exist), while the last_modified function
    should return a datetime object (or None if the resource doesn't exist).

    The ETag function should return a complete ETag, including quotes (e.g.
    '"etag"'), since that's the only way to distinguish between weak and strong
    ETags. If an unquoted ETag is returned (e.g. 'etag'), it will be converted
    to a strong ETag by adding quotes.

    This decorator will either pass control to the wrapped view function or
    return an HTTP 304 response (unmodified) or 412 response (precondition
    failed), depending upon the request method. In either case, the decorator
    will add the generated ETag and Last-Modified headers to the response if
    the headers aren't already set and if the request's method is safe.
    """
    def decorator(func):
        @wraps(func)
        def inner(request, *args, **kwargs):
            # Compute values (if any) for the requested resource.
            def get_last_modified():
                if last_modified_func:
                    dt = last_modified_func(request, *args, **kwargs)
                    if dt:
                        return timegm(dt.utctimetuple())

            # The value from etag_func() could be quoted or unquoted.
            res_etag = etag_func(request, *args, **kwargs) if etag_func else None
            res_etag = quote_etag(res_etag) if res_etag is not None else None
            res_last_modified = get_last_modified()

            response = get_conditional_response(
                request,
                etag=res_etag,
                last_modified=res_last_modified,
            )

            if response is None:
                response = func(request, *args, **kwargs)

            # Set relevant headers on the response if they don't already exist
            # and if the request method is safe.
            if request.method in ('GET', 'HEAD'):
                if res_last_modified and not response.has_header('Last-Modified'):
                    response['Last-Modified'] = http_date(res_last_modified)
                if res_etag:
                    response.setdefault('ETag', res_etag)

            return response

        return inner
    return decorator


# Shortcut decorators for common cases based on ETag or Last-Modified only
Example #3
Source File: http.py    From python with Apache License 2.0 4 votes vote down vote up 
def condition(etag_func=None, last_modified_func=None):
    """
    Decorator to support conditional retrieval (or change) for a view
    function.

    The parameters are callables to compute the ETag and last modified time for
    the requested resource, respectively. The callables are passed the same
    parameters as the view itself. The ETag function should return a string (or
    None if the resource doesn't exist), while the last_modified function
    should return a datetime object (or None if the resource doesn't exist).

    The ETag function should return a complete ETag, including quotes (e.g.
    '"etag"'), since that's the only way to distinguish between weak and strong
    ETags. If an unquoted ETag is returned (e.g. 'etag'), it will be converted
    to a strong ETag by adding quotes.

    This decorator will either pass control to the wrapped view function or
    return an HTTP 304 response (unmodified) or 412 response (precondition
    failed), depending upon the request method. In either case, it will add the
    generated ETag and Last-Modified headers to the response if it doesn't
    already have them.
    """
    def decorator(func):
        @wraps(func, assigned=available_attrs(func))
        def inner(request, *args, **kwargs):
            # Compute values (if any) for the requested resource.
            def get_last_modified():
                if last_modified_func:
                    dt = last_modified_func(request, *args, **kwargs)
                    if dt:
                        return timegm(dt.utctimetuple())

            # The value from etag_func() could be quoted or unquoted.
            res_etag = etag_func(request, *args, **kwargs) if etag_func else None
            res_etag = quote_etag(res_etag) if res_etag is not None else None
            res_last_modified = get_last_modified()

            response = get_conditional_response(
                request,
                etag=res_etag,
                last_modified=res_last_modified,
            )

            if response is None:
                response = func(request, *args, **kwargs)

            # Set relevant headers on the response if they don't already exist.
            if res_last_modified and not response.has_header('Last-Modified'):
                response['Last-Modified'] = http_date(res_last_modified)
            if res_etag and not response.has_header('ETag'):
                response['ETag'] = res_etag

            return response

        return inner
    return decorator


# Shortcut decorators for common cases based on ETag or Last-Modified only
Example #4
Source File: http.py    From openhgsenti with Apache License 2.0 4 votes vote down vote up 
def condition(etag_func=None, last_modified_func=None):
    """
    Decorator to support conditional retrieval (or change) for a view
    function.

    The parameters are callables to compute the ETag and last modified time for
    the requested resource, respectively. The callables are passed the same
    parameters as the view itself. The Etag function should return a string (or
    None if the resource doesn't exist), whilst the last_modified function
    should return a datetime object (or None if the resource doesn't exist).

    If both parameters are provided, all the preconditions must be met before
    the view is processed.

    This decorator will either pass control to the wrapped view function or
    return an HTTP 304 response (unmodified) or 412 response (preconditions
    failed), depending upon the request method.

    Any behavior marked as "undefined" in the HTTP spec (e.g. If-none-match
    plus If-modified-since headers) will result in the view function being
    called.
    """
    def decorator(func):
        @wraps(func, assigned=available_attrs(func))
        def inner(request, *args, **kwargs):
            # Compute values (if any) for the requested resource.
            def get_last_modified():
                if last_modified_func:
                    dt = last_modified_func(request, *args, **kwargs)
                    if dt:
                        return timegm(dt.utctimetuple())

            res_etag = etag_func(request, *args, **kwargs) if etag_func else None
            res_last_modified = get_last_modified()

            response = get_conditional_response(
                request,
                etag=res_etag,
                last_modified=res_last_modified,
            )

            if response is None:
                response = func(request, *args, **kwargs)

            # Set relevant headers on the response if they don't already exist.
            if res_last_modified and not response.has_header('Last-Modified'):
                response['Last-Modified'] = http_date(res_last_modified)
            if res_etag and not response.has_header('ETag'):
                response['ETag'] = quote_etag(res_etag)

            return response

        return inner
    return decorator


# Shortcut decorators for common cases based on ETag or Last-Modified only
Example #5
Source File: api.py    From c3nav with Apache License 2.0 4 votes vote down vote up 
def api_etag(permissions=True, etag_func=AccessPermission.etag_func,
             cache_parameters=None, cache_kwargs=None, base_mapdata_check=False):
    def wrapper(func):
        @wraps(func)
        def wrapped_func(self, request, *args, **kwargs):
            response_format = self.perform_content_negotiation(request)[0].format
            etag_user = (':'+str(request.user.pk or 0)) if response_format == 'api' else ''
            raw_etag = '%s%s:%s:%s' % (response_format, etag_user, get_language(),
                                       (etag_func(request) if permissions else MapUpdate.current_cache_key()))
            if base_mapdata_check and self.base_mapdata:
                raw_etag += ':%d' % request.user_permissions.can_access_base_mapdata
            etag = quote_etag(raw_etag)

            response = get_conditional_response(request, etag=etag)
            if response is None:
                cache_key = 'mapdata:api:'+request.path_info[5:].replace('/', '-').strip('-')+':'+raw_etag
                if cache_parameters is not None:
                    for param, type_ in cache_parameters.items():
                        value = int(param in request.GET) if type_ == bool else type_(request.GET.get(param))
                        cache_key += ':'+urlsafe_base64_encode(str(value).encode())
                if cache_kwargs is not None:
                    for name, type_ in cache_kwargs.items():
                        value = type_(kwargs[name])
                        if type_ == bool:
                            value = int(value)
                        cache_key += ':'+urlsafe_base64_encode(str(value).encode())
                data = request_cache.get(cache_key)
                if data is not None:
                    response = Response(data)

                if response is None:
                    with GeometryMixin.dont_keep_originals():
                        response = func(self, request, *args, **kwargs)
                    if cache_parameters is not None and response.status_code == 200:
                        request_cache.set(cache_key, response.data, 900)

            if response.status_code == 200:
                response['ETag'] = etag
                response['Cache-Control'] = 'no-cache'
            return response
        return wrapped_func
    return wrapper
Example #6
Source File: http.py    From python2017 with MIT License 4 votes vote down vote up 
def condition(etag_func=None, last_modified_func=None):
    """
    Decorator to support conditional retrieval (or change) for a view
    function.

    The parameters are callables to compute the ETag and last modified time for
    the requested resource, respectively. The callables are passed the same
    parameters as the view itself. The ETag function should return a string (or
    None if the resource doesn't exist), while the last_modified function
    should return a datetime object (or None if the resource doesn't exist).

    The ETag function should return a complete ETag, including quotes (e.g.
    '"etag"'), since that's the only way to distinguish between weak and strong
    ETags. If an unquoted ETag is returned (e.g. 'etag'), it will be converted
    to a strong ETag by adding quotes.

    This decorator will either pass control to the wrapped view function or
    return an HTTP 304 response (unmodified) or 412 response (precondition
    failed), depending upon the request method. In either case, it will add the
    generated ETag and Last-Modified headers to the response if it doesn't
    already have them.
    """
    def decorator(func):
        @wraps(func, assigned=available_attrs(func))
        def inner(request, *args, **kwargs):
            # Compute values (if any) for the requested resource.
            def get_last_modified():
                if last_modified_func:
                    dt = last_modified_func(request, *args, **kwargs)
                    if dt:
                        return timegm(dt.utctimetuple())

            # The value from etag_func() could be quoted or unquoted.
            res_etag = etag_func(request, *args, **kwargs) if etag_func else None
            res_etag = quote_etag(res_etag) if res_etag is not None else None
            res_last_modified = get_last_modified()

            response = get_conditional_response(
                request,
                etag=res_etag,
                last_modified=res_last_modified,
            )

            if response is None:
                response = func(request, *args, **kwargs)

            # Set relevant headers on the response if they don't already exist.
            if res_last_modified and not response.has_header('Last-Modified'):
                response['Last-Modified'] = http_date(res_last_modified)
            if res_etag and not response.has_header('ETag'):
                response['ETag'] = res_etag

            return response

        return inner
    return decorator


# Shortcut decorators for common cases based on ETag or Last-Modified only