decipher.update(data[, inputEncoding][, outputEncoding])

• data <string> | <Buffer> | <TypedArray> | <DataView>
• inputEncoding <string> data 字符串的 编码。
• outputEncoding <string> 返回值的编码。
• 返回：<Buffer> | <string>

使用 data 更新解码器。如果提供了 inputEncoding 参数，data 参数就是使用指定编码的字符串。如果未提供 inputEncoding 参数，data 必须是 Buffer。如果 data 是 Buffer，则忽略 inputEncoding。

🌐 Updates the decipher with data. If the inputEncoding argument is given, the data argument is a string using the specified encoding. If the inputEncoding argument is not given, data must be a Buffer. If data is a Buffer then inputEncoding is ignored.

outputEncoding 指定了加密数据的输出格式。如果指定了 outputEncoding，将返回使用指定编码的字符串。如果未提供 outputEncoding，则返回一个 Buffer。

🌐 The outputEncoding specifies the output format of the enciphered data. If the outputEncoding is specified, a string using the specified encoding is returned. If no outputEncoding is provided, a Buffer is returned.

decipher.update() 方法可以多次调用以处理新数据，直到调用 decipher.final()。在调用 decipher.final() 之后再调用 decipher.update() 会导致抛出错误。

🌐 The decipher.update() method can be called multiple times with new data until decipher.final() is called. Calling decipher.update() after decipher.final() will result in an error being thrown.