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Class BufferStream

表示一个缓存流。

Hierarchy

  • Writable
    • BufferStream

Implements

  • WritableStream

Index

Constructors

Properties

Accessors

Methods

Constructors

constructor

Properties

file

file: File

获取当前写入的目标文件。

length

length: number = 0

获取当前流的长度。

writable

writable: boolean

Static defaultMaxListeners

defaultMaxListeners: number

Accessors

capacity

  • get capacity(): number

Methods

_write

  • _write(chunk: Buffer, encoding: string, callback: Function): void

  • 底层实现写入操作。

    override

    Parameters

    • chunk: Buffer

      要写入的缓存。

    • encoding: string

      写入的编码。

    • callback: Function

      写入的回调。

    Returns void

addListener

  • addListener(event: string, listener: Function): this
  • addListener(event: "close", listener: function): this
  • addListener(event: "drain", listener: function): this
  • addListener(event: "error", listener: function): this
  • addListener(event: "finish", listener: function): this
  • addListener(event: "pipe", listener: function): this
  • addListener(event: "unpipe", listener: function): this

  • Event emitter The defined events on documents including:

    1. close
    2. drain
    3. error
    4. finish
    5. pipe
    6. unpipe

    Parameters

    • event: string
    • listener: Function

    Returns this

  • Parameters

    • event: "close"
    • listener: function
        • (): void

        • Returns void

    Returns this

  • Parameters

    • event: "drain"
    • listener: function
        • (): void

        • Returns void

    Returns this

  • Parameters

    • event: "error"
    • listener: function
        • (err: Error): void

        • Parameters

          • err: Error

          Returns void

    Returns this

  • Parameters

    • event: "finish"
    • listener: function
        • (): void

        • Returns void

    Returns this

  • Parameters

    • event: "pipe"
    • listener: function
        • (src: Readable): void

        • Parameters

          • src: Readable

          Returns void

    Returns this

  • Parameters

    • event: "unpipe"
    • listener: function
        • (src: Readable): void

        • Parameters

          • src: Readable

          Returns void

    Returns this

emit

  • emit(event: string, ...args: any[]): boolean
  • emit(event: "close"): boolean
  • emit(event: "drain", chunk: Buffer | string): boolean
  • emit(event: "error", err: Error): boolean
  • emit(event: "finish"): boolean
  • emit(event: "pipe", src: Readable): boolean
  • emit(event: "unpipe", src: Readable): boolean

  • Parameters

    • event: string
    • Rest ...args: any[]

    Returns boolean

  • Parameters

    • event: "close"

    Returns boolean

  • Parameters

    • event: "drain"
    • chunk: Buffer | string

    Returns boolean

  • Parameters

    • event: "error"
    • err: Error

    Returns boolean

  • Parameters

    • event: "finish"

    Returns boolean

  • Parameters

    • event: "pipe"
    • src: Readable

    Returns boolean

  • Parameters

    • event: "unpipe"
    • src: Readable

    Returns boolean

end

  • end(): void

ensureCapacity

  • ensureCapacity(length: number): void

  • 确保当前流可以存放指定长度的缓存。

    Parameters

    • length: number

      要设置的新长度。

    Returns void

eventNames

  • eventNames(): (string | symbol)[]

  • Returns (string | symbol)[]

getMaxListeners

  • getMaxListeners(): number

  • Returns number

listenerCount

  • listenerCount(type: string | symbol): number

  • Parameters

    • type: string | symbol

    Returns number

listeners

  • listeners(event: string | symbol): Function[]

  • Parameters

    • event: string | symbol

    Returns Function[]

on

  • on(event: string, listener: Function): this
  • on(event: "close", listener: function): this
  • on(event: "drain", listener: function): this
  • on(event: "error", listener: function): this
  • on(event: "finish", listener: function): this
  • on(event: "pipe", listener: function): this
  • on(event: "unpipe", listener: function): this

  • Parameters

    • event: string
    • listener: Function

    Returns this

  • Parameters

    • event: "close"
    • listener: function
        • (): void

        • Returns void

    Returns this

  • Parameters

    • event: "drain"
    • listener: function
        • (): void

        • Returns void

    Returns this

  • Parameters

    • event: "error"
    • listener: function
        • (err: Error): void

        • Parameters

          • err: Error

          Returns void

    Returns this

  • Parameters

    • event: "finish"
    • listener: function
        • (): void

        • Returns void

    Returns this

  • Parameters

    • event: "pipe"
    • listener: function
        • (src: Readable): void

        • Parameters

          • src: Readable

          Returns void

    Returns this

  • Parameters

    • event: "unpipe"
    • listener: function
        • (src: Readable): void

        • Parameters

          • src: Readable

          Returns void

    Returns this

once

  • once(event: string, listener: Function): this
  • once(event: "close", listener: function): this
  • once(event: "drain", listener: function): this
  • once(event: "error", listener: function): this
  • once(event: "finish", listener: function): this
  • once(event: "pipe", listener: function): this
  • once(event: "unpipe", listener: function): this

  • Parameters

    • event: string
    • listener: Function

    Returns this

  • Parameters

    • event: "close"
    • listener: function
        • (): void

        • Returns void

    Returns this

  • Parameters

    • event: "drain"
    • listener: function
        • (): void

        • Returns void

    Returns this

  • Parameters

    • event: "error"
    • listener: function
        • (err: Error): void

        • Parameters

          • err: Error

          Returns void

    Returns this

  • Parameters

    • event: "finish"
    • listener: function
        • (): void

        • Returns void

    Returns this

  • Parameters

    • event: "pipe"
    • listener: function
        • (src: Readable): void

        • Parameters

          • src: Readable

          Returns void

    Returns this

  • Parameters

    • event: "unpipe"
    • listener: function
        • (src: Readable): void

        • Parameters

          • src: Readable

          Returns void

    Returns this

pipe

  • pipe<T>(destination: T, options?: object): T

  • Type parameters

    • T: WritableStream

    Parameters

    • destination: T
    • Optional options: object

    Returns T

prependListener

  • prependListener(event: string, listener: Function): this
  • prependListener(event: "close", listener: function): this
  • prependListener(event: "drain", listener: function): this
  • prependListener(event: "error", listener: function): this
  • prependListener(event: "finish", listener: function): this
  • prependListener(event: "pipe", listener: function): this
  • prependListener(event: "unpipe", listener: function): this

  • Parameters

    • event: string
    • listener: Function

    Returns this

  • Parameters

    • event: "close"
    • listener: function
        • (): void

        • Returns void

    Returns this

  • Parameters

    • event: "drain"
    • listener: function
        • (): void

        • Returns void

    Returns this

  • Parameters

    • event: "error"
    • listener: function
        • (err: Error): void

        • Parameters

          • err: Error

          Returns void

    Returns this

  • Parameters

    • event: "finish"
    • listener: function
        • (): void

        • Returns void

    Returns this

  • Parameters

    • event: "pipe"
    • listener: function
        • (src: Readable): void

        • Parameters

          • src: Readable

          Returns void

    Returns this

  • Parameters

    • event: "unpipe"
    • listener: function
        • (src: Readable): void

        • Parameters

          • src: Readable

          Returns void

    Returns this

prependOnceListener

  • prependOnceListener(event: string, listener: Function): this
  • prependOnceListener(event: "close", listener: function): this
  • prependOnceListener(event: "drain", listener: function): this
  • prependOnceListener(event: "error", listener: function): this
  • prependOnceListener(event: "finish", listener: function): this
  • prependOnceListener(event: "pipe", listener: function): this
  • prependOnceListener(event: "unpipe", listener: function): this

  • Parameters

    • event: string
    • listener: Function

    Returns this

  • Parameters

    • event: "close"
    • listener: function
        • (): void

        • Returns void

    Returns this

  • Parameters

    • event: "drain"
    • listener: function
        • (): void

        • Returns void

    Returns this

  • Parameters

    • event: "error"
    • listener: function
        • (err: Error): void

        • Parameters

          • err: Error

          Returns void

    Returns this

  • Parameters

    • event: "finish"
    • listener: function
        • (): void

        • Returns void

    Returns this

  • Parameters

    • event: "pipe"
    • listener: function
        • (src: Readable): void

        • Parameters

          • src: Readable

          Returns void

    Returns this

  • Parameters

    • event: "unpipe"
    • listener: function
        • (src: Readable): void

        • Parameters

          • src: Readable

          Returns void

    Returns this

removeAllListeners

  • removeAllListeners(event?: string | symbol): this

  • Parameters

    • Optional event: string | symbol

    Returns this

removeListener

  • removeListener(event: string, listener: Function): this
  • removeListener(event: "close", listener: function): this
  • removeListener(event: "drain", listener: function): this
  • removeListener(event: "error", listener: function): this
  • removeListener(event: "finish", listener: function): this
  • removeListener(event: "pipe", listener: function): this
  • removeListener(event: "unpipe", listener: function): this

  • Parameters

    • event: string
    • listener: Function

    Returns this

  • Parameters

    • event: "close"
    • listener: function
        • (): void

        • Returns void

    Returns this

  • Parameters

    • event: "drain"
    • listener: function
        • (): void

        • Returns void

    Returns this

  • Parameters

    • event: "error"
    • listener: function
        • (err: Error): void

        • Parameters

          • err: Error

          Returns void

    Returns this

  • Parameters

    • event: "finish"
    • listener: function
        • (): void

        • Returns void

    Returns this

  • Parameters

    • event: "pipe"
    • listener: function
        • (src: Readable): void

        • Parameters

          • src: Readable

          Returns void

    Returns this

  • Parameters

    • event: "unpipe"
    • listener: function
        • (src: Readable): void

        • Parameters

          • src: Readable

          Returns void

    Returns this

setDefaultEncoding

  • setDefaultEncoding(encoding: string): this

  • Parameters

    • encoding: string

    Returns this

setMaxListeners

  • setMaxListeners(n: number): this

  • Parameters

    • n: number

    Returns this

toBuffer

  • toBuffer(start?: number, end?: number): Buffer

  • 获取当前流的内容。

    Parameters

    • Default value start: number = 0

      开始的位置。

    • Default value end: number = this.length

      结束的位置。

    Returns Buffer

    返回复制的缓存对象。

toString

  • toString(encoding?: string, start?: number, end?: number): string

  • 获取当前流的字符串形式。

    Parameters

    • Optional encoding: string
    • Default value start: number = 0

      开始的位置。

    • Default value end: number = this.length

      结束的位置。

    Returns string

    返回字符串。

write

  • write(chunk: any, cb?: Function): boolean
  • write(chunk: any, encoding?: string, cb?: Function): boolean

  • Parameters

    • chunk: any
    • Optional cb: Function

    Returns boolean

  • Parameters

    • chunk: any
    • Optional encoding: string
    • Optional cb: Function

    Returns boolean

Static listenerCount

  • listenerCount(emitter: EventEmitter, event: string | symbol): number

  • Parameters

    • emitter: EventEmitter
    • event: string | symbol

    Returns number

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