datastructures

class litestar.datastructures.URL

基类：object

Representation and modification utilities of a URL.

fragment: str

Fragment component.

hostname: str | None

Hostname if specified.

netloc: str

Network location.

password: str | None

Password if specified.

path: str

Hierarchical path.

port: int | None

Port if specified.

query: str

Query string.

scheme: str

URL scheme.

username: str | None

Username if specified.

static __new__(cls, url: str | SplitResult) → URL

Create a new instance.

参数:

url -- url string or split result to represent.

classmethod from_components(scheme: str = '', netloc: str = '', path: str = '', fragment: str = '', query: str = '') → Self

Create a new URL from components.

参数:

• scheme -- URL scheme

• netloc -- Network location

• path -- Hierarchical path

• query -- Query component

• fragment -- Fragment identifier

返回:

A new URL with the given components

classmethod from_scope(scope: Scope) → Self

Construct a URL from a Scope

参数:

scope -- A scope

返回:

A URL

property query_params: MultiDict

Query parameters of a URL as a MultiDict

返回:

A MultiDict with query parameters

备注

• The returned MultiDict is mutable, URL itself is immutable,

  therefore mutating the query parameters will not directly mutate the URL. If you want to modify query parameters, make modifications in the multidict and pass them back to with_replacements()

with_replacements(scheme: str = '', netloc: str = '', path: str = '', query: str | MultiDict | None | EmptyType = _EmptyEnum.EMPTY, fragment: str = '') → Self

Create a new URL, replacing the given components.

参数:

• scheme -- URL scheme

• netloc -- Network location

• path -- Hierarchical path

• query -- Raw query string

• fragment -- Fragment identifier

返回:

A new URL with the given components replaced

class litestar.datastructures.Accept

基类：object

An Accept header.

__init__(accept_value: str) → None

accepts(media_type: str) → bool

Check if the request accepts the specified media type.

If multiple media types can be provided, it is better to use best_match().

参数:

media_type -- The media type to check for.

返回:

True if the request accepts media_type.

best_match(provided_types: list[str], default: str | None = None) → str | None

Find the best matching media type for the request.

参数:

• provided_types -- A list of media types that can be provided as a response. These types can contain a wildcard * character in the main- or subtype part.

• default -- The media type that is returned if none of the provided types match.

返回:

The best matching media type. If the matching provided type contains wildcard characters, they are replaced with the corresponding part of the accepted type. Otherwise the provided type is returned as-is.

class litestar.datastructures.Address

基类：NamedTuple

Just a network address.

static __new__(_cls, host: str, port: int)

Create new instance of Address(host, port)

host: str

Address host.

port: int

Address port.

class litestar.datastructures.CacheControlHeader

基类：Header

A cache-control header.

__init__(documentation_only: bool = False, max_age: int | None = None, s_maxage: int | None = None, no_cache: bool | None = None, no_store: bool | None = None, private: bool | None = None, public: bool | None = None, no_transform: bool | None = None, must_revalidate: bool | None = None, proxy_revalidate: bool | None = None, must_understand: bool | None = None, immutable: bool | None = None, stale_while_revalidate: int | None = None) → None

classmethod from_header(header_value: str) → CacheControlHeader

Create a CacheControlHeader instance from the header value.

参数:

header_value -- the header value as string

返回:

An instance of CacheControlHeader

immutable: bool | None = None

Accessor for the immutable directive.

max_age: int | None = None

Accessor for the max-age directive.

must_revalidate: bool | None = None

Accessor for the must-revalidate directive.

must_understand: bool | None = None

Accessor for the must-understand directive.

no_cache: bool | None = None

Accessor for the no-cache directive.

no_store: bool | None = None

Accessor for the no-store directive.

no_transform: bool | None = None

Accessor for the no-transform directive.

classmethod prevent_storing() → CacheControlHeader

Create a cache-control header with the no-store directive which indicates that any caches of any kind (private or shared) should not store this response.

private: bool | None = None

Accessor for the private directive.

proxy_revalidate: bool | None = None

Accessor for the proxy-revalidate directive.

public: bool | None = None

Accessor for the public directive.

s_maxage: int | None = None

Accessor for the s-maxage directive.

stale_while_revalidate: int | None = None

Accessor for the stale-while-revalidate directive.

class litestar.datastructures.Cookie

基类：object

Container class for defining a cookie using the Set-Cookie header.

See: https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Set-Cookie for more details regarding this header.

__eq__(other: Any) → bool

Determine whether two cookie instances are equal according to the cookie spec, i.e. hey have a similar path, domain and key.

参数:

other -- An arbitrary value

返回:

A boolean

__init__(key: str, path: str = '/', value: str | None = None, max_age: int | None = None, expires: int | None = None, domain: str | None = None, secure: bool | None = None, httponly: bool | None = None, samesite: Literal['lax', 'strict', 'none'] = 'lax', description: str | None = None, documentation_only: bool = False) → None

description: str | None = None

Description of the response cookie header for OpenAPI documentation.

property dict: dict[str, Any]

Get the cookie as a dict.

返回:

A dict of values

documentation_only: bool = False

Defines the Cookie instance as for OpenAPI documentation purpose only.

domain: str | None = None

Domain for which the cookie is valid.

expires: int | None = None

Seconds from now until the cookie expires.

httponly: bool | None = None

Forbids javascript to access the cookie via document.cookie.

max_age: int | None = None

Maximal age of the cookie before its invalidated.

path: str = '/'

Path fragment that must exist in the request url for the cookie to be valid.

Defaults to /.

samesite: Literal['lax', 'strict', 'none'] = 'lax'

Controls whether or not a cookie is sent with cross-site requests.

Defaults to 'lax'.

secure: bool | None = None

Https is required for the cookie.

property simple_cookie: SimpleCookie

Get a simple cookie object from the values.

返回:

A SimpleCookie

to_encoded_header() → tuple[bytes, bytes]

Create encoded header for ASGI send.

返回:

A two tuple of bytes.

to_header(**kwargs: Any) → str

Return a string representation suitable to be sent as HTTP headers.

参数:

**kwargs -- Any kwargs to pass to the simple cookie output method.

value: str | None = None

Value for the cookie, if none given defaults to empty string.

key: str

Key for the cookie.

class litestar.datastructures.ETag

基类：Header

An etag header.

__init__(documentation_only: bool = False, weak: bool = False, value: str | None = None) → None

classmethod from_header(header_value: str) → ETag

Construct an etag header from its string representation.

Note that this will unquote etag-values

class litestar.datastructures.FormMultiDict

基类：ImmutableMultiDict[Any]

MultiDict for form data.

async close() → None

Close all files in the multi-dict.

返回:

None

classmethod from_form_data(form_data: dict[str, list[str] | str | UploadFile]) → FormMultiDict

Create a FormMultiDict from form data.

参数:

form_data -- Form data to create the FormMultiDict from.

返回:

A FormMultiDict instance

class litestar.datastructures.Header

基类：ABC

An abstract type for HTTP headers.

__init__(documentation_only: bool = False) → None

documentation_only: bool = False

Defines the header instance as for OpenAPI documentation purpose only.

abstractmethod classmethod from_header(header_value: str) → Header

Construct a header from its string representation.

to_header(include_header_name: bool = False) → str

Get the header as string.

参数:

include_header_name -- should include the header name in the return value. If set to false the return value will only include the header value. if set to true the return value will be: <header name>: <header value>. Defaults to false.

class litestar.datastructures.Headers

基类：CIMultiDictProxy[str], MultiMixin[str]

An immutable, case-insensitive multi dict for HTTP headers.

__init__(headers: Mapping[str, str] | RawHeaders | MultiDict[str] | None = None) → None

Initialize Headers.

参数:

headers -- Initial value.

classmethod from_scope(scope: Scope) → Headers

Create headers from a send-message.

参数:

scope -- The ASGI connection scope.

返回:

Headers

抛出:

ValueError -- If the message does not have a headers key

to_header_list() → RawHeadersList

Raw header value.

返回:

A list of tuples contain the header and header-value as bytes

class litestar.datastructures.ImmutableMultiDict

基类：MultiDictProxy[T], MultiMixin[T], Generic[T]

Immutable MultiDict, using class:MultiDictProxy <multidict.MultiDictProxy>.

__init__(args: MultiMapping | Mapping[str, Any] | Iterable[tuple[str, Any]] | None = None) → None

Initialize ImmutableMultiDict from a MultiMapping`, Mapping or an iterable of tuples.

参数:

args -- Mapping-like structure to create the ImmutableMultiDict from

copy() → Self

Return a shallow copy

mutable_copy() → MultiDict[T]

Create a mutable copy as a MultiDict

返回:

A mutable multi dict

class litestar.datastructures.ImmutableState

基类：Mapping[str, Any]

An object meant to store arbitrary state.

It can be accessed using dot notation while exposing dict like functionalities.

__bool__() → bool

Return a boolean indicating whether the wrapped dict instance has values.

__copy__() → Self

Return a shallow copy of the given state object.

Customizes how the builtin "copy" function will work.

classmethod __get_validators__() → Generator[Callable[[ImmutableState | dict[str, Any] | Iterable[tuple[str, Any]]], ImmutableState], None, None]

Pydantic compatible method to allow custom parsing of state instances in a SignatureModel.

__getattr__(key: str) → Any

Get the value for the corresponding key from the wrapped state object using attribute notation.

参数:

key -- Key to retrieve

抛出:

AttributeError -- if the given attribute is not set.

返回:

The retrieved value

__getitem__(key: str) → Any

Get the value for the corresponding key from the wrapped state object using subscription notation.

参数:

key -- Key to access.

抛出:

KeyError --

返回:

A value from the wrapped state instance.

__init__(state: ImmutableState | Mapping[str, Any] | Iterable[tuple[str, Any]], deep_copy: bool = True) → None

Initialize an ImmutableState instance.

参数:

• state -- An object to initialize the state from. Can be a dict, an instance of ImmutableState, or a tuple of key value paris.

• deep_copy -- Whether to 'deepcopy' the passed in state.

示例

from litestar.datastructures import ImmutableState

state_dict = {"first": 1, "second": 2, "third": 3, "fourth": 4}
state = ImmutableState(state_dict)

# state implements the Mapping type:
assert len(state) == 3
assert "first" in state
assert not "fourth" in state
assert state["first"] == 1
assert [(k, v) for k, v in state.items()] == [("first", 1), ("second", 2), ("third", 3)]

# state implements __bool__
assert state  # state is true when it has values.
assert not State()  # state is empty when it has no values.

# it has a 'dict' method to retrieve a shallow copy of the underlying dict
inner_dict = state.dict()
assert inner_dict == state_dict

# you can also retrieve a mutable State by calling 'mutable_copy'
mutable_state = state.mutable_copy()
del state["first"]
assert "first" not in state

__iter__() → Iterator[str]

Return an iterator iterating the wrapped state dict.

返回:

An iterator of strings

__len__() → int

Return length of the wrapped state dict.

返回:

An integer

dict() → dict[str, Any]

Return a shallow copy of the wrapped dict.

返回:

A dict

mutable_copy() → State

Return a mutable copy of the state object.

返回:

A State

classmethod validate(value: ImmutableState | dict[str, Any] | Iterable[tuple[str, Any]]) → Self

Parse a value and instantiate state inside a SignatureModel. This allows us to use custom subclasses of state, as well as allows users to decide whether state is mutable or immutable.

参数:

value -- The value from which to initialize the state instance.

返回:

An ImmutableState instance

class litestar.datastructures.MultiDict

基类：MultiDict[T], MultiMixin[T], Generic[T]

MultiDict, using MultiDict.

__init__(args: MultiMapping | Mapping[str, T] | Iterable[tuple[str, T]] | None = None) → None

Initialize MultiDict from a`MultiMapping``, Mapping or an iterable of tuples.

参数:

args -- Mapping-like structure to create the MultiDict from

copy() → Self

Return a shallow copy

immutable() → ImmutableMultiDict[T]

Create an.

ImmutableMultiDict view.

返回:

An immutable multi dict

class litestar.datastructures.MultiMixin

基类：Generic[T], MultiMapping[T], ABC

Mixin providing common methods for multi dicts, used by ImmutableMultiDict and MultiDict

dict() → dict[str, list[Any]]

Return the multi-dict as a dict of lists.

返回:

A dict of lists

multi_items() → Generator[tuple[str, T], None, None]

Get all keys and values, including duplicates.

返回:

A list of tuples containing key-value pairs

class litestar.datastructures.MutableScopeHeaders

基类：MutableMapping

A case-insensitive, multidict-like structure that can be used to mutate headers within a Scope

__delitem__(key: str) → None

Delete all headers matching name

__getitem__(key: str) → str

Get the first header matching name

__init__(scope: HeaderScope | None = None) → None

Initialize MutableScopeHeaders from a HeaderScope.

参数:

scope -- The ASGI connection scope.

__iter__() → Iterator[str]

Create an iterator of header names including duplicates.

__len__() → int

Return the length of the internally stored headers, including duplicates.

__setitem__(key: str, value: str) → None

Set a header in the scope, overwriting duplicates.

add(key: str, value: str) → None

Add a header to the scope.

备注

• This method keeps duplicates.

参数:

• key -- Header key.

• value -- Header value.

返回:

None.

extend_header_value(key: str, value: str) → None

Extend a multivalued header.

备注

• A multivalues header is a header that can take a comma separated list.

• If the header previously did not exist, it will be added.

参数:

• key -- Header key.

• value -- Header value to add,

返回:

None

classmethod from_message(message: Message) → MutableScopeHeaders

Construct a header from a message object.

参数:

message -- Message.

返回:

MutableScopeHeaders.

抛出:

ValueError -- If the message does not have a headers key.

getall(key: str, default: list[str] | None = None) → list[str]

Get all values of a header.

参数:

• key -- Header key.

• default -- Default value to return if name is not found.

返回:

A list of strings.

抛出:

KeyError -- if no header for name was found and default is not given.

class litestar.datastructures.ResponseHeader

基类：object

Container type for a response header.

__init__(name: str, documentation_only: bool = False, value: str | None = None, description: str | None = None, required: bool = False, deprecated: bool = False, style: str | None = None, explode: bool | None = None, example: Any | None = None, examples: dict[str, Example] | None = None) → None

__post_init__() → None

Ensure that either value is set or the instance is for documentation_only.

deprecated: bool = False

Specifies that a parameter is deprecated and SHOULD be transitioned out of usage.

Default value is false.

description: str | None = None

A brief description of the parameter. This could contain examples of use.

[CommonMark syntax](https://spec.commonmark.org/) MAY be used for rich text representation.

documentation_only: bool = False

Defines the ResponseHeader instance as for OpenAPI documentation purpose only.

example: Any | None = None

Example of the parameter's potential value.

The example SHOULD match the specified schema and encoding properties if present. The example field is mutually exclusive of the examples field. Furthermore, if referencing a schema that contains an example, the example value SHALL _override_ the example provided by the schema. To represent examples of media types that cannot naturally be represented in JSON or YAML, a string value can contain the example with escaping where necessary.

examples: dict[str, Example] | None = None

Examples of the parameter's potential value. Each example SHOULD contain a value in the correct format as specified in the parameter encoding. The examples field is mutually exclusive of the example field. Furthermore, if referencing a schema that contains an example, the examples value SHALL _override_ the example provided by the schema.

For more complex scenarios, the [content](https://spec.openapis.org/oas/v3.1.0#parameterContent) property can define the media type and schema of the parameter. A parameter MUST contain either a schema property, or a content property, but not both. When example or examples are provided in conjunction with the schema object, the example MUST follow the prescribed serialization strategy for the parameter.

explode: bool | None = None

When this is true, parameter values of type array or object generate separate parameters for each value of the array or key-value pair of the map.

For other types of parameters this property has no effect. When [style](https://spec.openapis.org/oas/v3.1.0#parameterStyle) is form, the default value is true. For all other styles, the default value is false.

required: bool = False

Determines whether this parameter is mandatory.

If the [parameter location](https://spec.openapis.org/oas/v3.1.0#parameterIn) is "path", this property is REQUIRED and its value MUST be true. Otherwise, the property MAY be included and its default value is false.

style: str | None = None

Describes how the parameter value will be serialized depending on the type of the parameter value. Default values (based on value of in):

• for query - form;

• for path - simple;

• for header - simple;

• for cookie - form.

value: str | None = None

Value to set for the response header.

name: str

Header name

class litestar.datastructures.SecretBytes

基类：SecretValue[bytes]

Represents a secret bytes value.

get_obscured() → bytes

Overrides the base class method to return the hidden bytes value.

返回:

The hidden bytes representation of the secret value.

返回类型:

bytes

class litestar.datastructures.SecretString

基类：SecretValue[str]

Represents a secret string value.

get_obscured() → str

Overrides the base class method to return the hidden string value.

返回:

The hidden string representation of the secret value.

返回类型:

str

class litestar.datastructures.State

基类：ImmutableState, MutableMapping[str, Any]

An object meant to store arbitrary state.

It can be accessed using dot notation while exposing dict like functionalities.

__delattr__(key: str) → None

Delete the value from the key from the wrapped state object using attribute notation.

参数:

key -- Key to delete

抛出:

AttributeError -- if the given attribute is not set.

返回:

None

__delitem__(key: str) → None

Delete the value from the key from the wrapped state object using subscription notation.

参数:

key -- Key to delete

抛出:

KeyError -- if the given attribute is not set.

返回:

None

__init__(state: ImmutableState | Mapping[str, Any] | Iterable[tuple[str, Any]] | None = None, deep_copy: bool = False) → None

Initialize a State instance with an optional value.

参数:

• state -- An object to initialize the state from. Can be a dict, an instance of 'ImmutableState', or a tuple of key value paris.

• deep_copy -- Whether to 'deepcopy' the passed in state.

Examples

from litestar.datastructures import State

state_dict = {"first": 1, "second": 2, "third": 3, "fourth": 4}
state = State(state_dict)

# state can be accessed using '.' notation
assert state.fourth == 4
del state.fourth

# state implements the Mapping type:
assert len(state) == 3
assert "first" in state
assert not "fourth" in state
assert state["first"] == 1
assert [(k, v) for k, v in state.items()] == [("first", 1), ("second", 2), ("third", 3)]

state["fourth"] = 4
assert "fourth" in state
del state["fourth"]

# state implements __bool__
assert state  # state is true when it has values.
assert not State()  # state is empty when it has no values.

# it has shallow copy
copied_state = state.copy()
del copied_state.first
assert state.first

# it has a 'dict' method to retrieve a shallow copy of the underlying dict
inner_dict = state.dict()
assert inner_dict == state_dict

# you can get an immutable copy of the state by calling 'immutable_immutable_copy'
immutable_copy = state.immutable_copy()
del immutable_copy.first  #  raises AttributeError

__setattr__(key: str, value: Any) → None

Set an item in the state using attribute notation.

参数:

• key -- Key to set.

• value -- Value to set.

返回:

None

__setitem__(key: str, value: Any) → None

Set an item in the state using subscription notation.

参数:

• key -- Key to set.

• value -- Value to set.

返回:

None

copy() → Self

Return a shallow copy of the state object.

返回:

A State

immutable_copy() → ImmutableState

Return a shallow copy of the state object, setting it to be frozen.

返回:

A State

class litestar.datastructures.UploadFile

基类：object

Representation of a file upload

__init__(content_type: str, filename: str, file_data: bytes | None = None, headers: dict[str, str] | None = None, max_spool_size: int = 1048576) → None

Upload file in-memory container.

参数:

• content_type -- Content type for the file.

• filename -- The filename.

• file_data -- File data.

• headers -- Any attached headers.

• max_spool_size -- The size above which the temporary file will be rolled to disk.

async close() → None

Async proxy for file close.

返回:

None.

async read(size: int = -1) → bytes

Proxy for data reading.

参数:

size -- position from which to read.

返回:

Byte string.

property rolled_to_disk: bool

Determine whether the spooled file exceeded the rolled-to-disk threshold and is no longer in memory.

返回:

A boolean flag

async seek(offset: int) → int

Async proxy for file seek.

参数:

offset -- start position..

返回:

The new absolute file position (in bytes) after seeking.

async write(data: bytes | bytearray) → int

Proxy for data writing.

参数:

data -- Byte string to write.

返回:

Number of bytes written (int).

• secret_values