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agent-base
Advanced tools
The agent-base package is a module for Node.js that allows you to create custom HTTP/HTTPS Agents. It is used to implement custom proxying behavior, connection pooling, and other HTTP client enhancements. It provides a simple way to extend the core `http.Agent` class to customize the behavior of HTTP requests.
Custom HTTP Agent
This feature allows you to create a custom HTTP agent by providing a function that handles HTTP requests. The function can perform custom logic and must return a stream, socket, or an existing agent.
const agent = require('agent-base');
function myAgent(request, options) {
// Custom logic for handling HTTP requests
return new Promise((resolve, reject) => {
// Resolve with a custom stream, socket, or an existing agent
resolve(myCustomStreamOrSocket);
});
}
module.exports = agent(myAgent);
HTTPS Agent with Custom Certificate
This feature demonstrates how to create an HTTPS agent with a custom certificate. The agent is created by extending the `https.Agent` class and adding custom options, such as SSL key and certificate.
const agent = require('agent-base');
const https = require('https');
const fs = require('fs');
const options = {
key: fs.readFileSync('key.pem'),
cert: fs.readFileSync('cert.pem')
};
const httpsAgent = agent((req, opts) => {
return new Promise((resolve, reject) => {
opts = Object.assign({}, opts, options);
resolve(new https.Agent(opts));
});
});
module.exports = httpsAgent;
The http-proxy-agent package provides an HTTP Agent implementation that connects to a specified HTTP proxy server. It is similar to agent-base in that it allows you to customize the behavior of HTTP requests, but it is specifically designed for proxying.
Similar to http-proxy-agent, https-proxy-agent is an HTTPS Agent implementation for proxying HTTPS requests. It provides similar functionality to agent-base but is tailored for HTTPS connections through a proxy server.
The socks-proxy-agent package is an HTTP Agent that connects to a SOCKS proxy server. It is another example of a package that extends the functionality of the core HTTP Agent, similar to agent-base, but with a focus on SOCKS proxy support.
http.Agent
instanceThis module provides an http.Agent
generator. That is, you pass it an async
callback function, and it returns a new http.Agent
instance that will invoke the
given callback function when sending outbound HTTP requests.
Here's some more interesting uses of agent-base
. Send a pull request to
list yours!
http-proxy-agent
: An HTTP(s) proxy http.Agent
implementation for HTTP endpointshttps-proxy-agent
: An HTTP(s) proxy http.Agent
implementation for HTTPS endpointssocks-proxy-agent
: A SOCKS (v4a) proxy http.Agent
implementation for HTTP and HTTPSInstall with npm
:
$ npm install agent-base
Here's a minimal example that creates a new net.Socket
connection to the server
for every HTTP request (i.e. the equivalent of agent: false
option):
var url = require('url');
var net = require('net');
var http = require('http');
var agent = require('agent-base');
var endpoint = 'http://nodejs.org/api/';
var opts = url.parse(endpoint);
// This is the important part!
opts.agent = agent(function (req, opts, fn) {
if (!opts.port) opts.port = 80;
var socket = net.connect(opts);
fn(null, socket);
});
// Everything else works just like normal...
http.get(opts, function (res) {
console.log('"response" event!', res.headers);
res.pipe(process.stdout);
});
(The MIT License)
Copyright (c) 2013 Nathan Rajlich <nathan@tootallnate.net>
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the 'Software'), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
FAQs
Turn a function into an `http.Agent` instance
The npm package agent-base receives a total of 65,417,056 weekly downloads. As such, agent-base popularity was classified as popular.
We found that agent-base demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 1 open source maintainer collaborating on the project.
Did you know?
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