Node.js v8.deserializer.readRawBytes()用法及代碼示例

這個v8.deserializer.readRawBytes()方法用於從解串器的內部緩衝區讀取原始字節。它本質上返回緩衝區而不反序列化它。輸入參數 ‘length’ 指的是在將原始字節寫入同一內​​部緩衝區時傳遞的緩衝區長度。

用法

v8.deserializer.readRawBytes(length)

參數

它需要一個參數 -

• length- 此參數接受傳遞給的緩衝區長度的輸入serializer.writeRawBytes()。

Example 1

創建一個文件名"readRawBytes.js"並複製以下代碼片段。創建文件後，使用命令“node readRawBytes.js”運行此代碼。

// v8.serializer.readRawBytes() Demo Example

// Importing the v8 module
const v8 = require('v8');

// Initializing the serializer object
const serializer = new v8.Serializer();

// Wriitng the data to the internal buffer
serializer.writeRawBytes(v8.serialize(12345));

// Initializing the serializer object
const deserializer = new
v8.Deserializer(serializer.releaseBuffer());

// Reading the raw bytes data from internal buffer
console.log(deserializer.readRawBytes(6));

輸出

C:\home\node>> node readRawBytes.js
<Buffer ff 0d 49 f2 c0 01>

Example 2

讓我們再看一個例子

// v8.serializer.readRawBytes() Demo Example

// Importing the v8 module
const v8 = require('v8');

// Initializing the serializer object
const serializer = new v8.Serializer();
var buffer;

// Wriitng the data to the internal buffer
function writeRawBytes(data, len) {
   serializer.writeRawBytes(v8.serialize(data));
   buffer = serializer.releaseBuffer();
   console.log("Data written & Retrieved:")
   console.log(buffer)
   readRawBytes(len);
}

// Reading the raw bytes data from internal buffer
function readRawBytes(len) {
   const deserializer = new v8.Deserializer(buffer);
   console.log(deserializer.readRawBytes(len));
}

writeRawBytes(9876, 6)
writeRawBytes('Welcome to TutorialsPoint', 29)
writeRawBytes(12345, 6)

輸出

C:\home\node>> node readRawBytes.js
Data written & Retrieved:
   <Buffer ff 0d 49 a8 9a 01>
   <Buffer ff 0d 49 a8 9a 01>
Data written & Retrieved:
   <Buffer ff 0d 22 19 57 65 6c 63 6f 6d 65 20 74 6f 20 54 75 74 6f
   72 69 61 6c 73 50 6f 69 6e 74>
   <Buffer ff 0d 22 19 57 65 6c 63 6f 6d 65 20 74 6f 20 54 75 74 6f
   72 69 61 6c 73 50 6f 69 6e 74>
Data written & Retrieved:
   <Buffer ff 0d 49 f2 c0 01>
   <Buffer ff 0d 49 f2 c0 01>