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denoland-deno/cli/tsc/dts/lib.deno.unstable.d.ts

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// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
/// <reference no-default-lib="true" />
/// <reference lib="deno.ns" />
/// <reference lib="deno.broadcast_channel" />
declare namespace Deno {
export {}; // stop default export type behavior
/** **UNSTABLE**: New API, yet to be vetted.
*
* Retrieve the process umask. If `mask` is provided, sets the process umask.
* This call always returns what the umask was before the call.
*
* ```ts
* console.log(Deno.umask()); // e.g. 18 (0o022)
* const prevUmaskValue = Deno.umask(0o077); // e.g. 18 (0o022)
* console.log(Deno.umask()); // e.g. 63 (0o077)
* ```
*
* This API is under consideration to determine if permissions are required to
* call it.
*
* *Note*: This API is not implemented on Windows
*
* @category File System
*/
export function umask(mask?: number): number;
/** **UNSTABLE**: New API, yet to be vetted.
*
* All plain number types for interfacing with foreign functions.
*
* @category FFI
*/
type NativeNumberType =
| "u8"
| "i8"
| "u16"
| "i16"
| "u32"
| "i32"
| "f32"
| "f64";
/** **UNSTABLE**: New API, yet to be vetted.
*
* All BigInt number types for interfacing with foreign functions.
*
* @category FFI
*/
type NativeBigIntType =
| "u64"
| "i64"
| "usize"
| "isize";
/** **UNSTABLE**: New API, yet to be vetted.
*
* The native boolean type for interfacing to foreign functions.
*
* @category FFI
*/
type NativeBooleanType = "bool";
/** **UNSTABLE**: New API, yet to be vetted.
*
* The native pointer type for interfacing to foreign functions.
*
* @category FFI
*/
type NativePointerType = "pointer";
/** **UNSTABLE**: New API, yet to be vetted.
*
* The native buffer type for interfacing to foreign functions.
*
* @category FFI
*/
type NativeBufferType = "buffer";
/** **UNSTABLE**: New API, yet to be vetted.
*
* The native function type for interfacing with foreign functions.
*
* @category FFI
*/
type NativeFunctionType = "function";
/** **UNSTABLE**: New API, yet to be vetted.
*
* The native void type for interfacing with foreign functions.
*
* @category FFI
*/
type NativeVoidType = "void";
/** **UNSTABLE**: New API, yet to be vetted.
*
* The native struct type for interfacing with foreign functions.
*
* @category FFI
*/
type NativeStructType = { readonly struct: readonly NativeType[] };
/** **UNSTABLE**: New API, yet to be vetted.
*
* All supported types for interfacing with foreign functions.
*
* @category FFI
*/
export type NativeType =
| NativeNumberType
| NativeBigIntType
| NativeBooleanType
| NativePointerType
| NativeBufferType
| NativeFunctionType
| NativeStructType;
/** **UNSTABLE**: New API, yet to be vetted.
*
* @category FFI
*/
export type NativeResultType = NativeType | NativeVoidType;
/** **UNSTABLE**: New API, yet to be vetted.
*
* A utility type conversion for foreign symbol parameters and unsafe callback
* return types.
*
* @category FFI
*/
type ToNativeTypeMap =
& Record<NativeNumberType, number>
& Record<NativeBigIntType, number | bigint>
& Record<NativeBooleanType, boolean>
& Record<NativePointerType, PointerValue>
& Record<NativeFunctionType, PointerValue>
& Record<NativeBufferType, BufferSource | null>;
/** **UNSTABLE**: New API, yet to be vetted.
*
* Type conversion for foreign symbol parameters and unsafe callback return
* types.
*
* @category FFI
*/
type ToNativeType<T extends NativeType = NativeType> = T extends
NativeStructType ? BufferSource
: ToNativeTypeMap[Exclude<T, NativeStructType>];
/** **UNSTABLE**: New API, yet to be vetted.
*
* A utility type for conversion for unsafe callback return types.
*
* @category FFI
*/
type ToNativeResultTypeMap = ToNativeTypeMap & Record<NativeVoidType, void>;
/** **UNSTABLE**: New API, yet to be vetted.
*
* Type conversion for unsafe callback return types.
*
* @category FFI
*/
type ToNativeResultType<T extends NativeResultType = NativeResultType> =
T extends NativeStructType ? BufferSource
: ToNativeResultTypeMap[Exclude<T, NativeStructType>];
/** **UNSTABLE**: New API, yet to be vetted.
*
* A utility type for conversion of parameter types of foreign functions.
*
* @category FFI
*/
type ToNativeParameterTypes<T extends readonly NativeType[]> =
//
[(T[number])[]] extends [T] ? ToNativeType<T[number]>[]
: [readonly (T[number])[]] extends [T]
? readonly ToNativeType<T[number]>[]
: T extends readonly [...NativeType[]] ? {
[K in keyof T]: ToNativeType<T[K]>;
}
: never;
/** **UNSTABLE**: New API, yet to be vetted.
*
* A utility type for conversion of foreign symbol return types and unsafe
* callback parameters.
*
* @category FFI
*/
type FromNativeTypeMap =
& Record<NativeNumberType, number>
& Record<NativeBigIntType, number | bigint>
& Record<NativeBooleanType, boolean>
& Record<NativePointerType, PointerValue>
& Record<NativeBufferType, PointerValue>
& Record<NativeFunctionType, PointerValue>;
/** **UNSTABLE**: New API, yet to be vetted.
*
* Type conversion for foreign symbol return types and unsafe callback
* parameters.
*
* @category FFI
*/
type FromNativeType<T extends NativeType = NativeType> = T extends
NativeStructType ? Uint8Array
: FromNativeTypeMap[Exclude<T, NativeStructType>];
/** **UNSTABLE**: New API, yet to be vetted.
*
* A utility type for conversion for foreign symbol return types.
*
* @category FFI
*/
type FromNativeResultTypeMap =
& FromNativeTypeMap
& Record<NativeVoidType, void>;
/** **UNSTABLE**: New API, yet to be vetted.
*
* Type conversion for foreign symbol return types.
*
* @category FFI
*/
type FromNativeResultType<T extends NativeResultType = NativeResultType> =
T extends NativeStructType ? Uint8Array
: FromNativeResultTypeMap[Exclude<T, NativeStructType>];
/** **UNSTABLE**: New API, yet to be vetted.
*
* @category FFI
*/
type FromNativeParameterTypes<
T extends readonly NativeType[],
> =
//
[(T[number])[]] extends [T] ? FromNativeType<T[number]>[]
: [readonly (T[number])[]] extends [T]
? readonly FromNativeType<T[number]>[]
: T extends readonly [...NativeType[]] ? {
[K in keyof T]: FromNativeType<T[K]>;
}
: never;
/** **UNSTABLE**: New API, yet to be vetted.
*
* The interface for a foreign function as defined by its parameter and result
* types.
*
* @category FFI
*/
export interface ForeignFunction<
Parameters extends readonly NativeType[] = readonly NativeType[],
Result extends NativeResultType = NativeResultType,
NonBlocking extends boolean = boolean,
> {
/** Name of the symbol.
*
* Defaults to the key name in symbols object. */
name?: string;
/** The parameters of the foreign function. */
parameters: Parameters;
/** The result (return value) of the foreign function. */
result: Result;
/** When `true`, function calls will run on a dedicated blocking thread and
* will return a `Promise` resolving to the `result`. */
nonblocking?: NonBlocking;
/** When `true`, function calls can safely callback into JavaScript or
* trigger a garbage collection event.
*
* @default {false} */
callback?: boolean;
/** When `true`, dlopen will not fail if the symbol is not found.
* Instead, the symbol will be set to `null`.
*
* @default {false} */
optional?: boolean;
}
/** **UNSTABLE**: New API, yet to be vetted.
*
* @category FFI
*/
export interface ForeignStatic<Type extends NativeType = NativeType> {
/** Name of the symbol, defaults to the key name in symbols object. */
name?: string;
/** The type of the foreign static value. */
type: Type;
/** When `true`, dlopen will not fail if the symbol is not found.
* Instead, the symbol will be set to `null`.
*
* @default {false} */
optional?: boolean;
}
/** **UNSTABLE**: New API, yet to be vetted.
*
* A foreign library interface descriptor.
*
* @category FFI
*/
export interface ForeignLibraryInterface {
[name: string]: ForeignFunction | ForeignStatic;
}
/** **UNSTABLE**: New API, yet to be vetted.
*
* A utility type that infers a foreign symbol.
*
* @category FFI
*/
type StaticForeignSymbol<T extends ForeignFunction | ForeignStatic> =
T extends ForeignFunction ? FromForeignFunction<T>
: T extends ForeignStatic ? FromNativeType<T["type"]>
: never;
/** **UNSTABLE**: New API, yet to be vetted.
*
* @category FFI
*/
type FromForeignFunction<T extends ForeignFunction> = T["parameters"] extends
readonly [] ? () => StaticForeignSymbolReturnType<T>
: (
...args: ToNativeParameterTypes<T["parameters"]>
) => StaticForeignSymbolReturnType<T>;
/** **UNSTABLE**: New API, yet to be vetted.
*
* @category FFI
*/
type StaticForeignSymbolReturnType<T extends ForeignFunction> =
ConditionalAsync<T["nonblocking"], FromNativeResultType<T["result"]>>;
/** **UNSTABLE**: New API, yet to be vetted.
*
* @category FFI
*/
type ConditionalAsync<IsAsync extends boolean | undefined, T> =
IsAsync extends true ? Promise<T> : T;
/** **UNSTABLE**: New API, yet to be vetted.
*
* A utility type that infers a foreign library interface.
*
* @category FFI
*/
type StaticForeignLibraryInterface<T extends ForeignLibraryInterface> = {
[K in keyof T]: T[K]["optional"] extends true
? StaticForeignSymbol<T[K]> | null
: StaticForeignSymbol<T[K]>;
};
/** @category FFI */
const brand: unique symbol;
/** @category FFI */
type PointerObject = { [brand]: unknown };
/** **UNSTABLE**: New API, yet to be vetted.
*
* Pointer type depends on the architecture and actual pointer value.
*
* On a 32 bit host system all pointer values are plain numbers. On a 64 bit
* host system pointer values are represented as numbers if the value is below
* `Number.MAX_SAFE_INTEGER`, otherwise they are provided as bigints.
*
* @category FFI
*/
export type PointerValue = null | PointerObject;
/** **UNSTABLE**: New API, yet to be vetted.
*
* An unsafe pointer to a memory location for passing and returning pointers
* to and from the FFI.
*
* @category FFI
*/
export class UnsafePointer {
/** Create a pointer from a numeric value. This one is <i>really</i> dangerous! */
static create(value: number | bigint): PointerValue;
/** Returns `true` if the two pointers point to the same address. */
static equals(a: PointerValue, b: PointerValue): boolean;
/** Return the direct memory pointer to the typed array in memory. */
static of(value: Deno.UnsafeCallback | BufferSource): PointerValue;
/** Return a new pointer offset from the original by `offset` bytes. */
static offset(
value: NonNullable<PointerValue>,
offset: number,
): PointerValue;
/** Get the numeric value of a pointer */
static value(value: PointerValue): number | bigint;
}
/** **UNSTABLE**: New API, yet to be vetted.
*
* An unsafe pointer view to a memory location as specified by the `pointer`
* value. The `UnsafePointerView` API follows the standard built in interface
* {@linkcode DataView} for accessing the underlying types at an memory
* location (numbers, strings and raw bytes).
*
* @category FFI
*/
export class UnsafePointerView {
constructor(pointer: NonNullable<PointerValue>);
pointer: NonNullable<PointerValue>;
/** Gets a boolean at the specified byte offset from the pointer. */
getBool(offset?: number): boolean;
/** Gets an unsigned 8-bit integer at the specified byte offset from the
* pointer. */
getUint8(offset?: number): number;
/** Gets a signed 8-bit integer at the specified byte offset from the
* pointer. */
getInt8(offset?: number): number;
/** Gets an unsigned 16-bit integer at the specified byte offset from the
* pointer. */
getUint16(offset?: number): number;
/** Gets a signed 16-bit integer at the specified byte offset from the
* pointer. */
getInt16(offset?: number): number;
/** Gets an unsigned 32-bit integer at the specified byte offset from the
* pointer. */
getUint32(offset?: number): number;
/** Gets a signed 32-bit integer at the specified byte offset from the
* pointer. */
getInt32(offset?: number): number;
/** Gets an unsigned 64-bit integer at the specified byte offset from the
* pointer. */
getBigUint64(offset?: number): number | bigint;
/** Gets a signed 64-bit integer at the specified byte offset from the
* pointer. */
getBigInt64(offset?: number): number | bigint;
/** Gets a signed 32-bit float at the specified byte offset from the
* pointer. */
getFloat32(offset?: number): number;
/** Gets a signed 64-bit float at the specified byte offset from the
* pointer. */
getFloat64(offset?: number): number;
/** Gets a pointer at the specified byte offset from the pointer */
getPointer(offset?: number): PointerValue;
/** Gets a C string (`null` terminated string) at the specified byte offset
* from the pointer. */
getCString(offset?: number): string;
/** Gets a C string (`null` terminated string) at the specified byte offset
* from the specified pointer. */
static getCString(
pointer: NonNullable<PointerValue>,
offset?: number,
): string;
/** Gets an `ArrayBuffer` of length `byteLength` at the specified byte
* offset from the pointer. */
getArrayBuffer(byteLength: number, offset?: number): ArrayBuffer;
/** Gets an `ArrayBuffer` of length `byteLength` at the specified byte
* offset from the specified pointer. */
static getArrayBuffer(
pointer: NonNullable<PointerValue>,
byteLength: number,
offset?: number,
): ArrayBuffer;
/** Copies the memory of the pointer into a typed array.
*
* Length is determined from the typed array's `byteLength`.
*
* Also takes optional byte offset from the pointer. */
copyInto(destination: BufferSource, offset?: number): void;
/** Copies the memory of the specified pointer into a typed array.
*
* Length is determined from the typed array's `byteLength`.
*
* Also takes optional byte offset from the pointer. */
static copyInto(
pointer: NonNullable<PointerValue>,
destination: BufferSource,
offset?: number,
): void;
}
/** **UNSTABLE**: New API, yet to be vetted.
*
* An unsafe pointer to a function, for calling functions that are not present
* as symbols.
*
* @category FFI
*/
export class UnsafeFnPointer<Fn extends ForeignFunction> {
/** The pointer to the function. */
pointer: NonNullable<PointerValue>;
/** The definition of the function. */
definition: Fn;
constructor(pointer: NonNullable<PointerValue>, definition: Const<Fn>);
/** Call the foreign function. */
call: FromForeignFunction<Fn>;
}
/** **UNSTABLE**: New API, yet to be vetted.
*
* Definition of a unsafe callback function.
*
* @category FFI
*/
export interface UnsafeCallbackDefinition<
Parameters extends readonly NativeType[] = readonly NativeType[],
Result extends NativeResultType = NativeResultType,
> {
/** The parameters of the callbacks. */
parameters: Parameters;
/** The current result of the callback. */
result: Result;
}
/** **UNSTABLE**: New API, yet to be vetted.
*
* An unsafe callback function.
*
* @category FFI
*/
type UnsafeCallbackFunction<
Parameters extends readonly NativeType[] = readonly NativeType[],
Result extends NativeResultType = NativeResultType,
> = Parameters extends readonly [] ? () => ToNativeResultType<Result> : (
...args: FromNativeParameterTypes<Parameters>
) => ToNativeResultType<Result>;
/** **UNSTABLE**: New API, yet to be vetted.
*
* An unsafe function pointer for passing JavaScript functions as C function
* pointers to foreign function calls.
*
* The function pointer remains valid until the `close()` method is called.
*
* All `UnsafeCallback` are always thread safe in that they can be called from
* foreign threads without crashing. However, they do not wake up the Deno event
* loop by default.
*
* If a callback is to be called from foreign threads, use the `threadSafe()`
* static constructor or explicitly call `ref()` to have the callback wake up
* the Deno event loop when called from foreign threads. This also stops
* Deno's process from exiting while the callback still exists and is not
* unref'ed.
*
* Use `deref()` to then allow Deno's process to exit. Calling `deref()` on
* a ref'ed callback does not stop it from waking up the Deno event loop when
* called from foreign threads.
*
* @category FFI
*/
export class UnsafeCallback<
Definition extends UnsafeCallbackDefinition = UnsafeCallbackDefinition,
> {
constructor(
definition: Const<Definition>,
callback: UnsafeCallbackFunction<
Definition["parameters"],
Definition["result"]
>,
);
/** The pointer to the unsafe callback. */
readonly pointer: NonNullable<PointerValue>;
/** The definition of the unsafe callback. */
readonly definition: Definition;
/** The callback function. */
readonly callback: UnsafeCallbackFunction<
Definition["parameters"],
Definition["result"]
>;
/**
* Creates an {@linkcode UnsafeCallback} and calls `ref()` once to allow it to
* wake up the Deno event loop when called from foreign threads.
*
* This also stops Deno's process from exiting while the callback still
* exists and is not unref'ed.
*/
static threadSafe<
Definition extends UnsafeCallbackDefinition = UnsafeCallbackDefinition,
>(
definition: Const<Definition>,
callback: UnsafeCallbackFunction<
Definition["parameters"],
Definition["result"]
>,
): UnsafeCallback<Definition>;
/**
* Increments the callback's reference counting and returns the new
* reference count.
*
* After `ref()` has been called, the callback always wakes up the
* Deno event loop when called from foreign threads.
*
* If the callback's reference count is non-zero, it keeps Deno's
* process from exiting.
*/
ref(): number;
/**
* Decrements the callback's reference counting and returns the new
* reference count.
*
* Calling `unref()` does not stop a callback from waking up the Deno
* event loop when called from foreign threads.
*
* If the callback's reference counter is zero, it no longer keeps
* Deno's process from exiting.
*/
unref(): number;
/**
* Removes the C function pointer associated with this instance.
*
* Continuing to use the instance or the C function pointer after closing
* the `UnsafeCallback` will lead to errors and crashes.
*
* Calling this method sets the callback's reference counting to zero,
* stops the callback from waking up the Deno event loop when called from
* foreign threads and no longer keeps Deno's process from exiting.
*/
close(): void;
}
/** **UNSTABLE**: New API, yet to be vetted.
*
* A dynamic library resource. Use {@linkcode Deno.dlopen} to load a dynamic
* library and return this interface.
*
* @category FFI
*/
export interface DynamicLibrary<S extends ForeignLibraryInterface> {
/** All of the registered library along with functions for calling them. */
symbols: StaticForeignLibraryInterface<S>;
/** Removes the pointers associated with the library symbols.
*
* Continuing to use symbols that are part of the library will lead to
* errors and crashes.
*
* Calling this method will also immediately set any references to zero and
* will no longer keep Deno's process from exiting.
*/
close(): void;
}
/**
* This magic code used to implement better type hints for {@linkcode Deno.dlopen}
*
* @category FFI
*/
type Cast<A, B> = A extends B ? A : B;
/** @category FFI */
type Const<T> = Cast<
T,
| (T extends string | number | bigint | boolean ? T : never)
| { [K in keyof T]: Const<T[K]> }
| []
>;
/** **UNSTABLE**: New API, yet to be vetted.
*
* Opens an external dynamic library and registers symbols, making foreign
* functions available to be called.
*
* Requires `allow-ffi` permission. Loading foreign dynamic libraries can in
* theory bypass all of the sandbox permissions. While it is a separate
* permission users should acknowledge in practice that is effectively the
* same as running with the `allow-all` permission.
*
* @example Given a C library which exports a foreign function named `add()`
*
* ```ts
* // Determine library extension based on
* // your OS.
* let libSuffix = "";
* switch (Deno.build.os) {
* case "windows":
* libSuffix = "dll";
* break;
* case "darwin":
* libSuffix = "dylib";
* break;
* default:
* libSuffix = "so";
* break;
* }
*
* const libName = `./libadd.${libSuffix}`;
* // Open library and define exported symbols
* const dylib = Deno.dlopen(
* libName,
* {
* "add": { parameters: ["isize", "isize"], result: "isize" },
* } as const,
* );
*
* // Call the symbol `add`
* const result = dylib.symbols.add(35, 34); // 69
*
* console.log(`Result from external addition of 35 and 34: ${result}`);
* ```
*
* @tags allow-ffi
* @category FFI
*/
export function dlopen<S extends ForeignLibraryInterface>(
filename: string | URL,
symbols: Const<S>,
): DynamicLibrary<S>;
/** **UNSTABLE**: New API, yet to be vetted.
*
* These are unstable options which can be used with {@linkcode Deno.run}.
*
* @category Sub Process
*/
interface UnstableRunOptions extends RunOptions {
/** If `true`, clears the environment variables before executing the
* sub-process.
*
* @default {false} */
clearEnv?: boolean;
/** For POSIX systems, sets the group ID for the sub process. */
gid?: number;
/** For POSIX systems, sets the user ID for the sub process. */
uid?: number;
}
/** **UNSTABLE**: New API, yet to be vetted.
*
* Spawns new subprocess. RunOptions must contain at a minimum the `opt.cmd`,
* an array of program arguments, the first of which is the binary.
*
* ```ts
* const p = Deno.run({
* cmd: ["curl", "https://example.com"],
* });
* const status = await p.status();
* ```
*
* Subprocess uses same working directory as parent process unless `opt.cwd`
* is specified.
*
* Environmental variables from parent process can be cleared using `opt.clearEnv`.
* Doesn't guarantee that only `opt.env` variables are present,
* as the OS may set environmental variables for processes.
*
* Environmental variables for subprocess can be specified using `opt.env`
* mapping.
*
* `opt.uid` sets the child process’s user ID. This translates to a setuid call
* in the child process. Failure in the setuid call will cause the spawn to fail.
*
* `opt.gid` is similar to `opt.uid`, but sets the group ID of the child process.
* This has the same semantics as the uid field.
*
* By default subprocess inherits stdio of parent process. To change
* this this, `opt.stdin`, `opt.stdout`, and `opt.stderr` can be set
* independently to a resource ID (_rid_) of an open file, `"inherit"`,
* `"piped"`, or `"null"`:
*
* - _number_: the resource ID of an open file/resource. This allows you to
* read or write to a file.
* - `"inherit"`: The default if unspecified. The subprocess inherits from the
* parent.
* - `"piped"`: A new pipe should be arranged to connect the parent and child
* sub-process.
* - `"null"`: This stream will be ignored. This is the equivalent of attaching
* the stream to `/dev/null`.
*
* Details of the spawned process are returned as an instance of
* {@linkcode Deno.Process}.
*
* Requires `allow-run` permission.
*
* @tags allow-run
* @category Sub Process
*/
export function run<T extends UnstableRunOptions = UnstableRunOptions>(
opt: T,
): Process<T>;
/** **UNSTABLE**: New API, yet to be vetted.
*
* A custom `HttpClient` for use with {@linkcode fetch} function. This is
* designed to allow custom certificates or proxies to be used with `fetch()`.
*
* @example ```ts
* const caCert = await Deno.readTextFile("./ca.pem");
* const client = Deno.createHttpClient({ caCerts: [ caCert ] });
* const req = await fetch("https://myserver.com", { client });
* ```
*
* @category Fetch API
*/
export interface HttpClient {
/** The resource ID associated with the client. */
rid: number;
/** Close the HTTP client. */
close(): void;
}
/** **UNSTABLE**: New API, yet to be vetted.
*
* The options used when creating a {@linkcode Deno.HttpClient}.
*
* @category Fetch API
*/
export interface CreateHttpClientOptions {
/** A list of root certificates that will be used in addition to the
* default root certificates to verify the peer's certificate.
*
* Must be in PEM format. */
caCerts?: string[];
/** A HTTP proxy to use for new connections. */
proxy?: Proxy;
/** PEM formatted client certificate chain. */
certChain?: string;
/** PEM formatted (RSA or PKCS8) private key of client certificate. */
privateKey?: string;
}
/** **UNSTABLE**: New API, yet to be vetted.
*
* The definition of a proxy when specifying
* {@linkcode Deno.CreateHttpClientOptions}.
*
* @category Fetch API
*/
export interface Proxy {
/** The string URL of the proxy server to use. */
url: string;
/** The basic auth credentials to be used against the proxy server. */
basicAuth?: BasicAuth;
}
/** **UNSTABLE**: New API, yet to be vetted.
*
* Basic authentication credentials to be used with a {@linkcode Deno.Proxy}
* server when specifying {@linkcode Deno.CreateHttpClientOptions}.
*
* @category Fetch API
*/
export interface BasicAuth {
/** The username to be used against the proxy server. */
username: string;
/** The password to be used against the proxy server. */
password: string;
}
/** **UNSTABLE**: New API, yet to be vetted.
*
* Create a custom HttpClient for to use with {@linkcode fetch}. This is an
* extension of the web platform Fetch API which allows Deno to use custom
* TLS certificates and connect via a proxy while using `fetch()`.
*
* @example ```ts
* const caCert = await Deno.readTextFile("./ca.pem");
* const client = Deno.createHttpClient({ caCerts: [ caCert ] });
* const response = await fetch("https://myserver.com", { client });
* ```
*
* @example ```ts
* const client = Deno.createHttpClient({
* proxy: { url: "http://myproxy.com:8080" }
* });
* const response = await fetch("https://myserver.com", { client });
* ```
*
* @category Fetch API
*/
export function createHttpClient(
options: CreateHttpClientOptions,
): HttpClient;
/** **UNSTABLE**: New API, yet to be vetted.
*
* Represents membership of a IPv4 multicast group.
*
* @category Network
*/
interface MulticastV4Membership {
/** Leaves the multicast group. */
leave: () => Promise<void>;
/** Sets the multicast loopback option. If enabled, multicast packets will be looped back to the local socket. */
setLoopback: (loopback: boolean) => Promise<void>;
/** Sets the time-to-live of outgoing multicast packets for this socket. */
setTTL: (ttl: number) => Promise<void>;
}
/** **UNSTABLE**: New API, yet to be vetted.
*
* Represents membership of a IPv6 multicast group.
*
* @category Network
*/
interface MulticastV6Membership {
/** Leaves the multicast group. */
leave: () => Promise<void>;
/** Sets the multicast loopback option. If enabled, multicast packets will be looped back to the local socket. */
setLoopback: (loopback: boolean) => Promise<void>;
}
/** **UNSTABLE**: New API, yet to be vetted.
*
* A generic transport listener for message-oriented protocols.
*
* @category Network
*/
export interface DatagramConn extends AsyncIterable<[Uint8Array, Addr]> {
/** Joins an IPv4 multicast group. */
joinMulticastV4(
address: string,
networkInterface: string,
): Promise<MulticastV4Membership>;
/** Joins an IPv6 multicast group. */
joinMulticastV6(
address: string,
networkInterface: number,
): Promise<MulticastV6Membership>;
/** Waits for and resolves to the next message to the instance.
*
* Messages are received in the format of a tuple containing the data array
* and the address information.
*/
receive(p?: Uint8Array): Promise<[Uint8Array, Addr]>;
/** Sends a message to the target via the connection. The method resolves
* with the number of bytes sent. */
send(p: Uint8Array, addr: Addr): Promise<number>;
/** Close closes the socket. Any pending message promises will be rejected
* with errors. */
close(): void;
/** Return the address of the instance. */
readonly addr: Addr;
[Symbol.asyncIterator](): AsyncIterableIterator<[Uint8Array, Addr]>;
}
/**
* @category Network
*/
export interface TcpListenOptions extends ListenOptions {
/** When `true` the SO_REUSEPORT flag will be set on the listener. This
* allows multiple processes to listen on the same address and port.
*
* On Linux this will cause the kernel to distribute incoming connections
* across the different processes that are listening on the same address and
* port.
*
* This flag is only supported on Linux. It is silently ignored on other
* platforms.
*
* @default {false} */
reusePort?: boolean;
}
/** **UNSTABLE**: New API, yet to be vetted.
*
* Unstable options which can be set when opening a Unix listener via
* {@linkcode Deno.listen} or {@linkcode Deno.listenDatagram}.
*
* @category Network
*/
export interface UnixListenOptions {
/** A path to the Unix Socket. */
path: string;
}
/** **UNSTABLE**: New API, yet to be vetted.
*
* Unstable options which can be set when opening a datagram listener via
* {@linkcode Deno.listenDatagram}.
*
* @category Network
*/
export interface UdpListenOptions extends ListenOptions {
/** When `true` the specified address will be reused, even if another
* process has already bound a socket on it. This effectively steals the
* socket from the listener.
*
* @default {false} */
reuseAddress?: boolean;
/** When `true`, sent multicast packets will be looped back to the local socket.
*
* @default {false} */
loopback?: boolean;
}
/** **UNSTABLE**: New API, yet to be vetted.
*
* Listen announces on the local transport address.
*
* ```ts
* const listener = Deno.listen({ path: "/foo/bar.sock", transport: "unix" })
* ```
*
* Requires `allow-read` and `allow-write` permission.
*
* @tags allow-read, allow-write
* @category Network
*/
export function listen(
options: UnixListenOptions & { transport: "unix" },
): Listener;
/** **UNSTABLE**: New API, yet to be vetted.
*
* Listen announces on the local transport address.
*
* ```ts
* const listener1 = Deno.listenDatagram({
* port: 80,
* transport: "udp"
* });
* const listener2 = Deno.listenDatagram({
* hostname: "golang.org",
* port: 80,
* transport: "udp"
* });
* ```
*
* Requires `allow-net` permission.
*
* @tags allow-net
* @category Network
*/
export function listenDatagram(
options: UdpListenOptions & { transport: "udp" },
): DatagramConn;
/** **UNSTABLE**: New API, yet to be vetted.
*
* Listen announces on the local transport address.
*
* ```ts
* const listener = Deno.listenDatagram({
* path: "/foo/bar.sock",
* transport: "unixpacket"
* });
* ```
*
* Requires `allow-read` and `allow-write` permission.
*
* @tags allow-read, allow-write
* @category Network
*/
export function listenDatagram(
options: UnixListenOptions & { transport: "unixpacket" },
): DatagramConn;
/** **UNSTABLE**: New API, yet to be vetted.
*
* @category Network
*/
export interface UnixConnectOptions {
transport: "unix";
path: string;
}
/** **UNSTABLE**: New API, yet to be vetted.
*
* Connects to the hostname (default is "127.0.0.1") and port on the named
* transport (default is "tcp"), and resolves to the connection (`Conn`).
*
* ```ts
* const conn1 = await Deno.connect({ port: 80 });
* const conn2 = await Deno.connect({ hostname: "192.0.2.1", port: 80 });
* const conn3 = await Deno.connect({ hostname: "[2001:db8::1]", port: 80 });
* const conn4 = await Deno.connect({ hostname: "golang.org", port: 80, transport: "tcp" });
* const conn5 = await Deno.connect({ path: "/foo/bar.sock", transport: "unix" });
* ```
*
* Requires `allow-net` permission for "tcp" and `allow-read` for "unix".
*
* @tags allow-net, allow-read
* @category Network
*/
export function connect(options: ConnectOptions): Promise<TcpConn>;
/** **UNSTABLE**: New API, yet to be vetted.
*
* Connects to the hostname (default is "127.0.0.1") and port on the named
* transport (default is "tcp"), and resolves to the connection (`Conn`).
*
* ```ts
* const conn1 = await Deno.connect({ port: 80 });
* const conn2 = await Deno.connect({ hostname: "192.0.2.1", port: 80 });
* const conn3 = await Deno.connect({ hostname: "[2001:db8::1]", port: 80 });
* const conn4 = await Deno.connect({ hostname: "golang.org", port: 80, transport: "tcp" });
* const conn5 = await Deno.connect({ path: "/foo/bar.sock", transport: "unix" });
* ```
*
* Requires `allow-net` permission for "tcp" and `allow-read` for "unix".
*
* @tags allow-net, allow-read
* @category Network
*/
export function connect(options: UnixConnectOptions): Promise<UnixConn>;
/** **UNSTABLE**: New API, yet to be vetted.
*
* @category Network
*/
export interface ConnectTlsOptions {
/** **UNSTABLE**: New API, yet to be vetted.
*
* PEM formatted client certificate chain.
*/
certChain?: string;
/** **UNSTABLE**: New API, yet to be vetted.
*
* PEM formatted (RSA or PKCS8) private key of client certificate.
*/
privateKey?: string;
/** **UNSTABLE**: New API, yet to be vetted.
*
* Application-Layer Protocol Negotiation (ALPN) protocols supported by
* the client. If not specified, no ALPN extension will be included in the
* TLS handshake.
*/
alpnProtocols?: string[];
}
/** **UNSTABLE**: New API, yet to be vetted.
*
* @category Network
*/
export interface TlsHandshakeInfo {
/** **UNSTABLE**: New API, yet to be vetted.
*
* Contains the ALPN protocol selected during negotiation with the server.
* If no ALPN protocol selected, returns `null`.
*/
alpnProtocol: string | null;
}
/** **UNSTABLE**: New API, yet to be vetted.
*
* @category Network
*/
export interface TlsConn extends Conn {
/** **UNSTABLE**: New API, yet to be vetted.
*
* Runs the client or server handshake protocol to completion if that has
* not happened yet. Calling this method is optional; the TLS handshake
* will be completed automatically as soon as data is sent or received.
*/
handshake(): Promise<TlsHandshakeInfo>;
}
/** **UNSTABLE**: New API, yet to be vetted.
*
* Create a TLS connection with an attached client certificate.
*
* ```ts
* const conn = await Deno.connectTls({
* hostname: "deno.land",
* port: 443,
* certChain: "---- BEGIN CERTIFICATE ----\n ...",
* privateKey: "---- BEGIN PRIVATE KEY ----\n ...",
* });
* ```
*
* Requires `allow-net` permission.
*
* @tags allow-net
* @category Network
*/
export function connectTls(options: ConnectTlsOptions): Promise<TlsConn>;
/** **UNSTABLE**: New API, yet to be vetted.
*
* @category Network
*/
export interface ListenTlsOptions {
/** **UNSTABLE**: New API, yet to be vetted.
*
* Application-Layer Protocol Negotiation (ALPN) protocols to announce to
* the client. If not specified, no ALPN extension will be included in the
* TLS handshake.
*/
alpnProtocols?: string[];
}
/** **UNSTABLE**: New API, yet to be vetted.
*
* @category Network
*/
export interface StartTlsOptions {
/** **UNSTABLE**: New API, yet to be vetted.
*
* Application-Layer Protocol Negotiation (ALPN) protocols to announce to
* the client. If not specified, no ALPN extension will be included in the
* TLS handshake.
*/
alpnProtocols?: string[];
}
/** **UNSTABLE**: New API, yet to be vetted.
*
* Acquire an advisory file-system lock for the provided file.
*
* @param [exclusive=false]
* @category File System
*/
export function flock(rid: number, exclusive?: boolean): Promise<void>;
/** **UNSTABLE**: New API, yet to be vetted.
*
* Acquire an advisory file-system lock synchronously for the provided file.
*
* @param [exclusive=false]
* @category File System
*/
export function flockSync(rid: number, exclusive?: boolean): void;
/** **UNSTABLE**: New API, yet to be vetted.
*
* Release an advisory file-system lock for the provided file.
*
* @category File System
*/
export function funlock(rid: number): Promise<void>;
/** **UNSTABLE**: New API, yet to be vetted.
*
* Release an advisory file-system lock for the provided file synchronously.
*
* @category File System
*/
export function funlockSync(rid: number): void;
/** **UNSTABLE**: New API, yet to be vetted.
*
* Information for a HTTP request.
*
* @category HTTP Server
*/
export interface ServeHandlerInfo {
/** The remote address of the connection. */
remoteAddr: Deno.NetAddr;
}
/** **UNSTABLE**: New API, yet to be vetted.
*
* A handler for HTTP requests. Consumes a request and returns a response.
*
* If a handler throws, the server calling the handler will assume the impact
* of the error is isolated to the individual request. It will catch the error
* and if necessary will close the underlying connection.
*
* @category HTTP Server
*/
export type ServeHandler = (
request: Request,
info: ServeHandlerInfo,
) => Response | Promise<Response>;
/** **UNSTABLE**: New API, yet to be vetted.
*
* Options which can be set when calling {@linkcode Deno.serve}.
*
* @category HTTP Server
*/
export interface ServeOptions extends Partial<Deno.ListenOptions> {
/** An {@linkcode AbortSignal} to close the server and all connections. */
signal?: AbortSignal;
/** Sets `SO_REUSEPORT` on POSIX systems. */
reusePort?: boolean;
/** The handler to invoke when route handlers throw an error. */
onError?: (error: unknown) => Response | Promise<Response>;
/** The callback which is called when the server starts listening. */
onListen?: (params: { hostname: string; port: number }) => void;
}
/** **UNSTABLE**: New API, yet to be vetted.
*
* Additional options which are used when opening a TLS (HTTPS) server.
*
* @category HTTP Server
*/
export interface ServeTlsOptions extends ServeOptions {
/** Server private key in PEM format */
cert: string;
/** Cert chain in PEM format */
key: string;
}
/** **UNSTABLE**: New API, yet to be vetted.
*
* @category HTTP Server
*/
export interface ServeInit {
/** The handler to invoke to process each incoming request. */
handler: ServeHandler;
}
/** **UNSTABLE**: New API, yet to be vetted.
*
* Serves HTTP requests with the given handler.
*
* You can specify an object with a port and hostname option, which is the
* address to listen on. The default is port `9000` on hostname `"127.0.0.1"`.
*
* The below example serves with the port `9000`.
*
* ```ts
* Deno.serve((_req) => new Response("Hello, world"));
* ```
*
* You can change the address to listen on using the `hostname` and `port`
* options. The below example serves on port `3000`.
*
* ```ts
* Deno.serve({ port: 3000 }, (_req) => new Response("Hello, world"));
* ```
*
* You can stop the server with an {@linkcode AbortSignal}. The abort signal
* needs to be passed as the `signal` option in the options bag. The server
* aborts when the abort signal is aborted. To wait for the server to close,
* await the promise returned from the `Deno.serve` API.
*
* ```ts
* const ac = new AbortController();
*
* Deno.serve({ signal: ac.signal }, (_req) => new Response("Hello, world"))
* .then(() => console.log("Server closed"));
*
* console.log("Closing server...");
* ac.abort();
* ```
*
* By default `Deno.serve` prints the message
* `Listening on http://<hostname>:<port>/` on listening. If you like to
* change this behavior, you can specify a custom `onListen` callback.
*
* ```ts
* Deno.serve({
* onListen({ port, hostname }) {
* console.log(`Server started at http://${hostname}:${port}`);
* // ... more info specific to your server ..
* },
* handler: (_req) => new Response("Hello, world"),
* });
* ```
*
* To enable TLS you must specify the `key` and `cert` options.
*
* ```ts
* const cert = "-----BEGIN CERTIFICATE-----\n...\n-----END CERTIFICATE-----\n";
* const key = "-----BEGIN PRIVATE KEY-----\n...\n-----END PRIVATE KEY-----\n";
* Deno.serve({ cert, key }, (_req) => new Response("Hello, world"));
* ```
*
* @category HTTP Server
*/
export function serve(handler: ServeHandler): Promise<void>;
/** **UNSTABLE**: New API, yet to be vetted.
*
* Serves HTTP requests with the given handler.
*
* You can specify an object with a port and hostname option, which is the
* address to listen on. The default is port `9000` on hostname `"127.0.0.1"`.
*
* The below example serves with the port `9000`.
*
* ```ts
* Deno.serve((_req) => new Response("Hello, world"));
* ```
*
* You can change the address to listen on using the `hostname` and `port`
* options. The below example serves on port `3000`.
*
* ```ts
* Deno.serve({ port: 3000 }, (_req) => new Response("Hello, world"));
* ```
*
* You can stop the server with an {@linkcode AbortSignal}. The abort signal
* needs to be passed as the `signal` option in the options bag. The server
* aborts when the abort signal is aborted. To wait for the server to close,
* await the promise returned from the `Deno.serve` API.
*
* ```ts
* const ac = new AbortController();
*
* Deno.serve({ signal: ac.signal }, (_req) => new Response("Hello, world"))
* .then(() => console.log("Server closed"));
*
* console.log("Closing server...");
* ac.abort();
* ```
*
* By default `Deno.serve` prints the message
* `Listening on http://<hostname>:<port>/` on listening. If you like to
* change this behavior, you can specify a custom `onListen` callback.
*
* ```ts
* Deno.serve({
* onListen({ port, hostname }) {
* console.log(`Server started at http://${hostname}:${port}`);
* // ... more info specific to your server ..
* },
* handler: (_req) => new Response("Hello, world"),
* });
* ```
*
* To enable TLS you must specify the `key` and `cert` options.
*
* ```ts
* const cert = "-----BEGIN CERTIFICATE-----\n...\n-----END CERTIFICATE-----\n";
* const key = "-----BEGIN PRIVATE KEY-----\n...\n-----END PRIVATE KEY-----\n";
* Deno.serve({ cert, key }, (_req) => new Response("Hello, world"));
* ```
*
* @category HTTP Server
*/
export function serve(
options: ServeOptions | ServeTlsOptions,
handler: ServeHandler,
): Promise<void>;
/** **UNSTABLE**: New API, yet to be vetted.
*
* Serves HTTP requests with the given handler.
*
* You can specify an object with a port and hostname option, which is the
* address to listen on. The default is port `9000` on hostname `"127.0.0.1"`.
*
* The below example serves with the port `9000`.
*
* ```ts
* Deno.serve((_req) => new Response("Hello, world"));
* ```
*
* You can change the address to listen on using the `hostname` and `port`
* options. The below example serves on port `3000`.
*
* ```ts
* Deno.serve({ port: 3000 }, (_req) => new Response("Hello, world"));
* ```
*
* You can stop the server with an {@linkcode AbortSignal}. The abort signal
* needs to be passed as the `signal` option in the options bag. The server
* aborts when the abort signal is aborted. To wait for the server to close,
* await the promise returned from the `Deno.serve` API.
*
* ```ts
* const ac = new AbortController();
*
* Deno.serve({ signal: ac.signal }, (_req) => new Response("Hello, world"))
* .then(() => console.log("Server closed"));
*
* console.log("Closing server...");
* ac.abort();
* ```
*
* By default `Deno.serve` prints the message
* `Listening on http://<hostname>:<port>/` on listening. If you like to
* change this behavior, you can specify a custom `onListen` callback.
*
* ```ts
* Deno.serve({
* onListen({ port, hostname }) {
* console.log(`Server started at http://${hostname}:${port}`);
* // ... more info specific to your server ..
* },
* handler: (_req) => new Response("Hello, world"),
* });
* ```
*
* To enable TLS you must specify the `key` and `cert` options.
*
* ```ts
* const cert = "-----BEGIN CERTIFICATE-----\n...\n-----END CERTIFICATE-----\n";
* const key = "-----BEGIN PRIVATE KEY-----\n...\n-----END PRIVATE KEY-----\n";
* Deno.serve({ cert, key }, (_req) => new Response("Hello, world"));
* ```
*
* @category HTTP Server
*/
export function serve(
options: ServeInit & (ServeOptions | ServeTlsOptions),
): Promise<void>;
/** **UNSTABLE**: New API, yet to be vetted.
*
* Allows "hijacking" the connection that the request is associated with. This
* can be used to implement protocols that build on top of HTTP (eg.
* {@linkcode WebSocket}).
*
* The returned promise returns underlying connection and first packet
* received. The promise shouldn't be awaited before responding to the
* `request`, otherwise event loop might deadlock.
*
* ```ts
* function handler(req: Request): Response {
* Deno.upgradeHttp(req).then(([conn, firstPacket]) => {
* // ...
* });
* return new Response(null, { status: 101 });
* }
* ```
*
* This method can only be called on requests originating the
* {@linkcode Deno.serveHttp} server.
*
* @category HTTP Server
*/
export function upgradeHttp(
request: Request,
): Promise<[Deno.Conn, Uint8Array]>;
/** **UNSTABLE**: New API, yet to be vetted.
*
* Open a new {@linkcode Deno.Kv} connection to persist data.
*
* When a path is provided, the database will be persisted to disk at that
* path. Read and write access to the file is required.
*
* When no path is provided, the database will be opened in a default path for
* the current script. This location is persistent across script runs and is
* keyed on the origin storage key (the same key that is used to determine
* `localStorage` persistence). More information about the origin storage key
* can be found in the Deno Manual.
*
* @tags allow-read, allow-write
* @category KV
*/
export function openKv(path?: string): Promise<Deno.Kv>;
/** **UNSTABLE**: New API, yet to be vetted.
*
* A key to be persisted in a {@linkcode Deno.Kv}. A key is a sequence
* of {@linkcode Deno.KvKeyPart}s.
*
* Keys are ordered lexicographically by their parts. The first part is the
* most significant, and the last part is the least significant. The order of
* the parts is determined by both the type and the value of the part. The
* relative significance of the types can be found in documentation for the
* {@linkcode Deno.KvKeyPart} type.
*
* Keys have a maximum size of 2048 bytes serialized. If the size of the key
* exceeds this limit, an error will be thrown on the operation that this key
* was passed to.
*
* @category KV
*/
export type KvKey = readonly KvKeyPart[];
/** **UNSTABLE**: New API, yet to be vetted.
*
* A single part of a {@linkcode Deno.KvKey}. Parts are ordered
* lexicographically, first by their type, and within a given type by their
* value.
*
* The ordering of types is as follows:
*
* 1. `Uint8Array`
* 2. `string`
* 3. `number`
* 4. `bigint`
* 5. `boolean`
*
* Within a given type, the ordering is as follows:
*
* - `Uint8Array` is ordered by the byte ordering of the array
* - `string` is ordered by the byte ordering of the UTF-8 encoding of the
* string
* - `number` is ordered following this pattern: `-NaN`
* < `-Infinity` < `-100.0` < `-1.0` < -`0.5` < `-0.0` < `0.0` < `0.5`
* < `1.0` < `100.0` < `Infinity` < `NaN`
* - `bigint` is ordered by mathematical ordering, with the largest negative
* number being the least first value, and the largest positive number
* being the last value
* - `boolean` is ordered by `false` < `true`
*
* This means that the part `1.0` (a number) is ordered before the part `2.0`
* (also a number), but is greater than the part `0n` (a bigint), because
* `1.0` is a number and `0n` is a bigint, and type ordering has precedence
* over the ordering of values within a type.
*
* @category KV
*/
export type KvKeyPart = Uint8Array | string | number | bigint | boolean;
/** **UNSTABLE**: New API, yet to be vetted.
*
* Consistency level of a KV operation.
*
* - `strong` - This operation must be strongly-consistent.
* - `eventual` - Eventually-consistent behavior is allowed.
*
* @category KV
*/
export type KvConsistencyLevel = "strong" | "eventual";
/** **UNSTABLE**: New API, yet to be vetted.
*
* A selector that selects the range of data returned by a list operation on a
* {@linkcode Deno.Kv}.
*
* The selector can either be a prefix selector or a range selector. A prefix
* selector selects all keys that start with the given prefix (optionally
* starting at a given key). A range selector selects all keys that are
* lexicographically between the given start and end keys.
*
* @category KV
*/
export type KvListSelector =
| { prefix: KvKey }
| { prefix: KvKey; start: KvKey }
| { prefix: KvKey; end: KvKey }
| { start: KvKey; end: KvKey };
/** **UNSTABLE**: New API, yet to be vetted.
*
* A mutation to a key in a {@linkcode Deno.Kv}. A mutation is a
* combination of a key, a value, and a type. The type determines how the
* mutation is applied to the key.
*
* - `set` - Sets the value of the key to the given value, overwriting any
* existing value.
* - `delete` - Deletes the key from the database. The mutation is a no-op if
* the key does not exist.
* - `sum` - Adds the given value to the existing value of the key. Both the
* value specified in the mutation, and any existing value must be of type
* `Deno.KvU64`. If the key does not exist, the value is set to the given
* value (summed with 0). If the result of the sum overflows an unsigned
* 64-bit integer, the result is wrapped around.
* - `max` - Sets the value of the key to the maximum of the existing value
* and the given value. Both the value specified in the mutation, and any
* existing value must be of type `Deno.KvU64`. If the key does not exist,
* the value is set to the given value.
* - `min` - Sets the value of the key to the minimum of the existing value
* and the given value. Both the value specified in the mutation, and any
* existing value must be of type `Deno.KvU64`. If the key does not exist,
* the value is set to the given value.
*
* @category KV
*/
export type KvMutation =
& { key: KvKey }
& (
| { type: "set"; value: unknown }
| { type: "delete" }
| { type: "sum"; value: KvU64 }
| { type: "max"; value: KvU64 }
| { type: "min"; value: KvU64 }
);
/** **UNSTABLE**: New API, yet to be vetted.
*
* An iterator over a range of data entries in a {@linkcode Deno.Kv}.
*
* The cursor getter returns the cursor that can be used to resume the
* iteration from the current position in the future.
*
* @category KV
*/
export class KvListIterator<T> implements AsyncIterableIterator<KvEntry<T>> {
/**
* Returns the cursor of the current position in the iteration. This cursor
* can be used to resume the iteration from the current position in the
* future by passing it to the `cursor` option of the `list` method.
*/
get cursor(): string;
next(): Promise<IteratorResult<KvEntry<T>, undefined>>;
[Symbol.asyncIterator](): AsyncIterableIterator<KvEntry<T>>;
}
/** **UNSTABLE**: New API, yet to be vetted.
*
* A versioned pair of key and value in a {@linkcode Deno.Kv}.
*
* The `versionstamp` is a string that represents the current version of the
* key-value pair. It can be used to perform atomic operations on the KV store
* by passing it to the `check` method of a {@linkcode Deno.AtomicOperation}.
*
* @category KV
*/
export type KvEntry<T> = { key: KvKey; value: T; versionstamp: string };
/**
* **UNSTABLE**: New API, yet to be vetted.
*
* An optional versioned pair of key and value in a {@linkcode Deno.Kv}.
*
* This is the same as a {@linkcode KvEntry}, but the `value` and `versionstamp`
* fields may be `null` if no value exists for the given key in the KV store.
*
* @category KV
*/
export type KvEntryMaybe<T> = KvEntry<T> | {
key: KvKey;
value: null;
versionstamp: null;
};
/** **UNSTABLE**: New API, yet to be vetted.
*
* Options for listing key-value pairs in a {@linkcode Deno.Kv}.
*
* @category KV
*/
export interface KvListOptions {
/**
* The maximum number of key-value pairs to return. If not specified, all
* matching key-value pairs will be returned.
*/
limit?: number;
/**
* The cursor to resume the iteration from. If not specified, the iteration
* will start from the beginning.
*/
cursor?: string;
/**
* Whether to reverse the order of the returned key-value pairs. If not
* specified, the order will be ascending from the start of the range as per
* the lexicographical ordering of the keys. If `true`, the order will be
* descending from the end of the range.
*
* The default value is `false`.
*/
reverse?: boolean;
/**
* The consistency level of the list operation. The default consistency
* level is "strong". Some use cases can benefit from using a weaker
* consistency level. For more information on consistency levels, see the
* documentation for {@linkcode Deno.KvConsistencyLevel}.
*
* List operations are performed in batches (in sizes specified by the
* `batchSize` option). The consistency level of the list operation is
* applied to each batch individually. This means that while each batch is
* guaranteed to be consistent within itself, the entire list operation may
* not be consistent across batches because a mutation may be applied to a
* key-value pair between batches, in a batch that has already been returned
* by the list operation.
*/
consistency?: KvConsistencyLevel;
/**
* The size of the batches in which the list operation is performed. Larger
* or smaller batch sizes may positively or negatively affect the
* performance of a list operation depending on the specific use case and
* iteration behavior. Slow iterating queries may benefit from using a
* smaller batch size for increased overall consistency, while fast
* iterating queries may benefit from using a larger batch size for better
* performance.
*
* The default batch size is equal to the `limit` option, or 100 if this is
* unset. The maximum value for this option is 500. Larger values will be
* clamped.
*/
batchSize?: number;
}
/** @category KV */
export interface KvCommitResult {
ok: true;
/** The versionstamp of the value committed to KV. */
versionstamp: string;
}
/** @category KV */
export interface KvCommitError {
ok: false;
}
/** **UNSTABLE**: New API, yet to be vetted.
*
* A check to perform as part of a {@linkcode Deno.AtomicOperation}. The check
* will fail if the versionstamp for the key-value pair in the KV store does
* not match the given versionstamp. A check with a `null` versionstamp checks
* that the key-value pair does not currently exist in the KV store.
*
* @category KV
*/
export interface AtomicCheck {
key: KvKey;
versionstamp: string | null;
}
/** **UNSTABLE**: New API, yet to be vetted.
*
* An operation on a {@linkcode Deno.Kv} that can be performed
* atomically. Atomic operations do not auto-commit, and must be committed
* explicitly by calling the `commit` method.
*
* Atomic operations can be used to perform multiple mutations on the KV store
* in a single atomic transaction. They can also be used to perform
* conditional mutations by specifying one or more
* {@linkcode Deno.AtomicCheck}s that ensure that a mutation is only performed
* if the key-value pair in the KV has a specific versionstamp. If any of the
* checks fail, the entire operation will fail and no mutations will be made.
*
* The ordering of mutations is guaranteed to be the same as the ordering of
* the mutations specified in the operation. Checks are performed before any
* mutations are performed. The ordering of checks is unobservable.
*
* Atomic operations can be used to implement optimistic locking, where a
* mutation is only performed if the key-value pair in the KV store has not
* been modified since the last read. This can be done by specifying a check
* that ensures that the versionstamp of the key-value pair matches the
* versionstamp that was read. If the check fails, the mutation will not be
* performed and the operation will fail. One can then retry the read-modify-
* write operation in a loop until it succeeds.
*
* The `commit` method of an atomic operation returns a value indicating
* whether checks passed and mutations were performed. If the operation failed
* because of a failed check, the return value will be a
* {@linkcode Deno.KvCommitError} with an `ok: false` property. If the
* operation failed for any other reason (storage error, invalid value, etc.),
* an exception will be thrown. If the operation succeeded, the return value
* will be a {@linkcode Deno.KvCommitResult} object with a `ok: true` property
* and the versionstamp of the value committed to KV.
*
* @category KV
*/
export class AtomicOperation {
/**
* Add to the operation a check that ensures that the versionstamp of the
* key-value pair in the KV store matches the given versionstamp. If the
* check fails, the entire operation will fail and no mutations will be
* performed during the commit.
*/
check(...checks: AtomicCheck[]): this;
/**
* Add to the operation a mutation that performs the specified mutation on
* the specified key if all checks pass during the commit. The types and
* semantics of all available mutations are described in the documentation
* for {@linkcode Deno.KvMutation}.
*/
mutate(...mutations: KvMutation[]): this;
/**
* Shortcut for creating a `sum` mutation. This method wraps `n` in a
* {@linkcode Deno.KvU64}, so the value of `n` must be in the range
* `[0, 2^64-1]`.
*/
sum(key: KvKey, n: bigint): this;
/**
* Shortcut for creating a `min` mutation. This method wraps `n` in a
* {@linkcode Deno.KvU64}, so the value of `n` must be in the range
* `[0, 2^64-1]`.
*/
min(key: KvKey, n: bigint): this;
/**
* Shortcut for creating a `max` mutation. This method wraps `n` in a
* {@linkcode Deno.KvU64}, so the value of `n` must be in the range
* `[0, 2^64-1]`.
*/
max(key: KvKey, n: bigint): this;
/**
* Add to the operation a mutation that sets the value of the specified key
* to the specified value if all checks pass during the commit.
*/
set(key: KvKey, value: unknown): this;
/**
* Add to the operation a mutation that deletes the specified key if all
* checks pass during the commit.
*/
delete(key: KvKey): this;
/**
* Commit the operation to the KV store. Returns a value indicating whether
* checks passed and mutations were performed. If the operation failed
* because of a failed check, the return value will be a {@linkcode
* Deno.KvCommitError} with an `ok: false` property. If the operation failed
* for any other reason (storage error, invalid value, etc.), an exception
* will be thrown. If the operation succeeded, the return value will be a
* {@linkcode Deno.KvCommitResult} object with a `ok: true` property and the
* versionstamp of the value committed to KV.
*
* If the commit returns `ok: false`, one may create a new atomic operation
* with updated checks and mutations and attempt to commit it again. See the
* note on optimistic locking in the documentation for
* {@linkcode Deno.AtomicOperation}.
*/
commit(): Promise<KvCommitResult | KvCommitError>;
}
/** **UNSTABLE**: New API, yet to be vetted.
*
* A key-value database that can be used to store and retrieve data.
*
* Data is stored as key-value pairs, where the key is a {@linkcode Deno.KvKey}
* and the value is an arbitrary structured-serializable JavaScript value.
* Keys are ordered lexicographically as described in the documentation for
* {@linkcode Deno.KvKey}. Keys are unique within a database, and the last
* value set for a given key is the one that is returned when reading the
* key. Keys can be deleted from the database, in which case they will no
* longer be returned when reading keys.
*
* Values can be any structured-serializable JavaScript value (objects,
* arrays, strings, numbers, etc.). The special value {@linkcode Deno.KvU64}
* can be used to store 64-bit unsigned integers in the database. This special
* value can not be nested within other objects or arrays. In addition to the
* regular database mutation operations, the unsigned 64-bit integer value
* also supports `sum`, `max`, and `min` mutations.
*
* Keys are versioned on write by assigning the key an ever-increasing
* "versionstamp". The versionstamp represents the version of a key-value pair
* in the database at some point in time, and can be used to perform
* transactional operations on the database without requiring any locking.
* This is enabled by atomic operations, which can have conditions that ensure
* that the operation only succeeds if the versionstamp of the key-value pair
* matches an expected versionstamp.
*
* Keys have a maximum length of 2048 bytes after serialization. Values have a
* maximum length of 64 KiB after serialization. Serialization of both keys
* and values is somewhat opaque, but one can usually assume that the
* serialization of any value is about the same length as the resulting string
* of a JSON serialization of that same value. If theses limits are exceeded,
* an exception will be thrown.
*
* @category KV
*/
export class Kv {
/**
* Retrieve the value and versionstamp for the given key from the database
* in the form of a {@linkcode Deno.KvEntryMaybe}. If no value exists for
* the key, the returned entry will have a `null` value and versionstamp.
*
* ```ts
* const db = await Deno.openKv();
* const result = await db.get(["foo"]);
* result.key; // ["foo"]
* result.value; // "bar"
* result.versionstamp; // "00000000000000010000"
* ```
*
* The `consistency` option can be used to specify the consistency level
* for the read operation. The default consistency level is "strong". Some
* use cases can benefit from using a weaker consistency level. For more
* information on consistency levels, see the documentation for
* {@linkcode Deno.KvConsistencyLevel}.
*/
get<T = unknown>(
key: KvKey,
options?: { consistency?: KvConsistencyLevel },
): Promise<KvEntryMaybe<T>>;
/**
* Retrieve multiple values and versionstamps from the database in the form
* of an array of {@linkcode Deno.KvEntryMaybe} objects. The returned array
* will have the same length as the `keys` array, and the entries will be in
* the same order as the keys. If no value exists for a given key, the
* returned entry will have a `null` value and versionstamp.
*
* ```ts
* const db = await Deno.openKv();
* const result = await db.getMany([["foo"], ["baz"]]);
* result[0].key; // ["foo"]
* result[0].value; // "bar"
* result[0].versionstamp; // "00000000000000010000"
* result[1].key; // ["baz"]
* result[1].value; // null
* result[1].versionstamp; // null
* ```
*
* The `consistency` option can be used to specify the consistency level
* for the read operation. The default consistency level is "strong". Some
* use cases can benefit from using a weaker consistency level. For more
* information on consistency levels, see the documentation for
* {@linkcode Deno.KvConsistencyLevel}.
*/
getMany<T extends readonly unknown[]>(
keys: readonly [...{ [K in keyof T]: KvKey }],
options?: { consistency?: KvConsistencyLevel },
): Promise<{ [K in keyof T]: KvEntryMaybe<T[K]> }>;
/**
* Set the value for the given key in the database. If a value already
* exists for the key, it will be overwritten.
*
* ```ts
* const db = await Deno.openKv();
* await db.set(["foo"], "bar");
* ```
*/
set(key: KvKey, value: unknown): Promise<KvCommitResult>;
/**
* Delete the value for the given key from the database. If no value exists
* for the key, this operation is a no-op.
*
* ```ts
* const db = await Deno.openKv();
* await db.delete(["foo"]);
* ```
*/
delete(key: KvKey): Promise<void>;
/**
* Retrieve a list of keys in the database. The returned list is an
* {@linkcode Deno.KvListIterator} which can be used to iterate over the
* entries in the database.
*
* Each list operation must specify a selector which is used to specify the
* range of keys to return. The selector can either be a prefix selector, or
* a range selector:
*
* - A prefix selector selects all keys that start with the given prefix of
* key parts. For example, the selector `["users"]` will select all keys
* that start with the prefix `["users"]`, such as `["users", "alice"]`
* and `["users", "bob"]`. Note that you can not partially match a key
* part, so the selector `["users", "a"]` will not match the key
* `["users", "alice"]`. A prefix selector may specify a `start` key that
* is used to skip over keys that are lexicographically less than the
* start key.
* - A range selector selects all keys that are lexicographically between
* the given start and end keys (including the start, and excluding the
* end). For example, the selector `["users", "a"], ["users", "n"]` will
* select all keys that start with the prefix `["users"]` and have a
* second key part that is lexicographically between `a` and `n`, such as
* `["users", "alice"]`, `["users", "bob"]`, and `["users", "mike"]`, but
* not `["users", "noa"]` or `["users", "zoe"]`.
*
* ```ts
* const db = await Deno.openKv();
* const entries = db.list({ prefix: ["users"] });
* for await (const entry of entries) {
* entry.key; // ["users", "alice"]
* entry.value; // { name: "Alice" }
* entry.versionstamp; // "00000000000000010000"
* }
* ```
*
* The `options` argument can be used to specify additional options for the
* list operation. See the documentation for {@linkcode Deno.KvListOptions}
* for more information.
*/
list<T = unknown>(
selector: KvListSelector,
options?: KvListOptions,
): KvListIterator<T>;
/**
* Create a new {@linkcode Deno.AtomicOperation} object which can be used to
* perform an atomic transaction on the database. This does not perform any
* operations on the database - the atomic transaction must be committed
* explicitly using the {@linkcode Deno.AtomicOperation.commit} method once
* all checks and mutations have been added to the operation.
*/
atomic(): AtomicOperation;
/**
* Close the database connection. This will prevent any further operations
* from being performed on the database, and interrupt any in-flight
* operations immediately.
*/
close(): void;
}
/** **UNSTABLE**: New API, yet to be vetted.
*
* Wrapper type for 64-bit unsigned integers for use as values in a
* {@linkcode Deno.Kv}.
*
* @category KV
*/
export class KvU64 {
/** Create a new `KvU64` instance from the given bigint value. If the value
* is signed or greater than 64-bits, an error will be thrown. */
constructor(value: bigint);
/** The value of this unsigned 64-bit integer, represented as a bigint. */
readonly value: bigint;
}
}
/** **UNSTABLE**: New API, yet to be vetted.
*
* The [Fetch API](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API)
* which also supports setting a {@linkcode Deno.HttpClient} which provides a
* way to connect via proxies and use custom TLS certificates.
*
* @tags allow-net, allow-read
* @category Fetch API
*/
declare function fetch(
input: Request | URL | string,
init?: RequestInit & { client: Deno.HttpClient },
): Promise<Response>;
/** **UNSTABLE**: New API, yet to be vetted.
*
* @category Web Workers
*/
declare interface WorkerOptions {
/** **UNSTABLE**: New API, yet to be vetted.
*
* Configure permissions options to change the level of access the worker will
* have. By default it will have no permissions. Note that the permissions
* of a worker can't be extended beyond its parent's permissions reach.
*
* - `"inherit"` will take the permissions of the thread the worker is created
* in.
* - `"none"` will use the default behavior and have no permission
* - A list of routes can be provided that are relative to the file the worker
* is created in to limit the access of the worker (read/write permissions
* only)
*
* Example:
*
* ```ts
* // mod.ts
* const worker = new Worker(
* new URL("deno_worker.ts", import.meta.url).href, {
* type: "module",
* deno: {
* permissions: {
* read: true,
* },
* },
* }
* );
* ```
*/
deno?: {
/** Set to `"none"` to disable all the permissions in the worker. */
permissions?: Deno.PermissionOptions;
};
}
/** **UNSTABLE**: New API, yet to be vetted.
*
* @category Web Sockets
*/
declare interface WebSocketStreamOptions {
protocols?: string[];
signal?: AbortSignal;
headers?: HeadersInit;
}
/** **UNSTABLE**: New API, yet to be vetted.
*
* @category Web Sockets
*/
declare interface WebSocketConnection {
readable: ReadableStream<string | Uint8Array>;
writable: WritableStream<string | Uint8Array>;
extensions: string;
protocol: string;
}
/** **UNSTABLE**: New API, yet to be vetted.
*
* @category Web Sockets
*/
declare interface WebSocketCloseInfo {
code?: number;
reason?: string;
}
/** **UNSTABLE**: New API, yet to be vetted.
*
* @tags allow-net
* @category Web Sockets
*/
declare class WebSocketStream {
constructor(url: string, options?: WebSocketStreamOptions);
url: string;
connection: Promise<WebSocketConnection>;
closed: Promise<WebSocketCloseInfo>;
close(closeInfo?: WebSocketCloseInfo): void;
}
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