agent.createConnection() 方法在 Node.js 中


agent.createConnection() 方法是 "http" 模块提供的接口。此方法产生可用于 HTTP 请求的套接字/流。我们可以使用自定义代理来覆盖此方法以提高灵活性。套接字/流可以通过两种方式返回 - 直接从此函数返回套接字/流,或将此套接字/流传递给回调函数。

语法

agent.createConnection(options, [callback])

参数

上述函数可接受以下参数 -

  • options – 这些选项将包含必须为其创建流的连接详细信息。

  • callback – 这将从代理接收创建的套接字连接。

示例

创建名为 connection.js 的文件并复制以下代码段。创建该文件后,使用以下命令运行此代码,如下例所示 -

node connection.js

connection.js

 实时演示

// Node.js program to demonstrate the creation of socket
// using agent.createConnection() method

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

// Creating a new agent
var agent = new http.Agent({});

// Creating connection with the above agent
var conn = agent.createConnection;
console.log('Connection is succesfully created !');

// Printing connection details
console.log('Connection: ', conn);

输出

C:\home
ode>> node connection.js Connection is succesfully created ! Connection: function connect(...args) {    var normalized = normalizeArgs(args);    var options = normalized[0];    debug('createConnection', normalized);    var socket = new Socket(options);    if (options.timeout) {       socket.setTimeout(options.timeout);    }    return socket.connect(normalized); }

示例

我们来看另一个示例。

 实时演示

// Node.js program to demonstrate the creation of socket
// using agent.createConnection() method

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

// Creating a new agent
var agent = new http.Agent({});

// Defining options for agent
const aliveAgent = new http.Agent({
   keepAlive: true,
   maxSockets: 0, maxSockets: 5,
});

// Creating connection with alive agent
var aliveConnection = aliveAgent.createConnection;

// Creating new connection
var connection = agent.createConnection;

// Printing the connection
console.log('Succesfully created connection with agent: ', connection.toString);
console.log('Succesfully created connection with alive agent: ',
aliveConnection.toString);

输出

C:\home
ode>> node connection.js Succesfully created connection with agent: function toString() { [native code] } Succesfully created connection with alive agent: function toString() { [native code] }

更新于:2021-05-20

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