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agent.createConnection() Method in Node.js
The agent.createConnection() method is an interface provided by the 'http' module. This method produces a socket/stream that can be used for the HTTP requests. One can use custom agents to override this method for greater flexibility. A socket/stream can be returned in two ways – either by returning the socket/stream directly from this function, or by passing this socket/stream to the callback.
Syntax
agent.createConnection(options, [callback])
Parameters
The above function can accept the following parameters −
options – These options will contain the connection details for which stream has to be created.
callback – This will receive the created socket connection from the agent.
Example
Create a file with the name – connection.js and copy the below code snippet. After creating the file, use the following command to run this code as shown in the example below −
node connection.js
connection.js
// 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);Output
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); }
Example
Let's take a look at one more example.
// 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);Output
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] }
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