diff --git a/doc/api/http.md b/doc/api/http.md index fa604e527223b8..95708332139aaf 100644 --- a/doc/api/http.md +++ b/doc/api/http.md @@ -187,7 +187,14 @@ of these values set to their respective defaults. To configure any of them, a custom [`http.Agent`][] instance must be created. -```js +```mjs +import { Agent, request } from 'node:http'; +const keepAliveAgent = new Agent({ keepAlive: true }); +options.agent = keepAliveAgent; +request(options, onResponseCallback); +``` + +```cjs const http = require('node:http'); const keepAliveAgent = new http.Agent({ keepAlive: true }); options.agent = keepAliveAgent; @@ -474,7 +481,62 @@ type other than {net.Socket}. A client and server pair demonstrating how to listen for the `'connect'` event: -```js +```mjs +import { createServer, request } from 'node:http'; +import { connect } from 'node:net'; +import { URL } from 'node:url'; + +// Create an HTTP tunneling proxy +const proxy = createServer((req, res) => { + res.writeHead(200, { 'Content-Type': 'text/plain' }); + res.end('okay'); +}); +proxy.on('connect', (req, clientSocket, head) => { + // Connect to an origin server + const { port, hostname } = new URL(`http://${req.url}`); + const serverSocket = connect(port || 80, hostname, () => { + clientSocket.write('HTTP/1.1 200 Connection Established\r\n' + + 'Proxy-agent: Node.js-Proxy\r\n' + + '\r\n'); + serverSocket.write(head); + serverSocket.pipe(clientSocket); + clientSocket.pipe(serverSocket); + }); +}); + +// Now that proxy is running +proxy.listen(1337, '127.0.0.1', () => { + + // Make a request to a tunneling proxy + const options = { + port: 1337, + host: '127.0.0.1', + method: 'CONNECT', + path: 'www.google.com:80', + }; + + const req = request(options); + req.end(); + + req.on('connect', (res, socket, head) => { + console.log('got connected!'); + + // Make a request over an HTTP tunnel + socket.write('GET / HTTP/1.1\r\n' + + 'Host: www.google.com:80\r\n' + + 'Connection: close\r\n' + + '\r\n'); + socket.on('data', (chunk) => { + console.log(chunk.toString()); + }); + socket.on('end', () => { + proxy.close(); + }); + }); +}); +``` + +```cjs const http = require('node:http'); const net = require('node:net'); const { URL } = require('node:url'); @@ -570,7 +632,25 @@ Upgrade). The listeners of this event will receive an object containing the HTTP version, status code, status message, key-value headers object, and array with the raw header names followed by their respective values. -```js +```mjs +import { request } from 'node:http'; + +const options = { + host: '127.0.0.1', + port: 8080, + path: '/length_request', +}; + +// Make a request +const req = request(options); +req.end(); + +req.on('information', (info) => { + console.log(`Got information prior to main response: ${info.statusCode}`); +}); +``` + +```cjs const http = require('node:http'); const options = { @@ -648,7 +728,49 @@ type other than {net.Socket}. A client server pair demonstrating how to listen for the `'upgrade'` event. -```js +```mjs +import http from 'node:http'; +import process from 'node:process'; + +// Create an HTTP server +const server = http.createServer((req, res) => { + res.writeHead(200, { 'Content-Type': 'text/plain' }); + res.end('okay'); +}); +server.on('upgrade', (req, socket, head) => { + socket.write('HTTP/1.1 101 Web Socket Protocol Handshake\r\n' + + 'Upgrade: WebSocket\r\n' + + 'Connection: Upgrade\r\n' + + '\r\n'); + + socket.pipe(socket); // echo back +}); + +// Now that server is running +server.listen(1337, '127.0.0.1', () => { + + // make a request + const options = { + port: 1337, + host: '127.0.0.1', + headers: { + 'Connection': 'Upgrade', + 'Upgrade': 'websocket', + }, + }; + + const req = http.request(options); + req.end(); + + req.on('upgrade', (res, socket, upgradeHead) => { + console.log('got upgraded!'); + socket.end(); + process.exit(0); + }); +}); +``` + +```cjs const http = require('node:http'); // Create an HTTP server @@ -1019,7 +1141,28 @@ When sending request through a keep-alive enabled agent, the underlying socket might be reused. But if server closes connection at unfortunate time, client may run into a 'ECONNRESET' error. -```js +```mjs +import http from 'node:http'; + +// Server has a 5 seconds keep-alive timeout by default +http + .createServer((req, res) => { + res.write('hello\n'); + res.end(); + }) + .listen(3000); + +setInterval(() => { + // Adapting a keep-alive agent + http.get('http://localhost:3000', { agent }, (res) => { + res.on('data', (data) => { + // Do nothing + }); + }); +}, 5000); // Sending request on 5s interval so it's easy to hit idle timeout +``` + +```cjs const http = require('node:http'); // Server has a 5 seconds keep-alive timeout by default @@ -1043,7 +1186,27 @@ setInterval(() => { By marking a request whether it reused socket or not, we can do automatic error retry base on it. -```js +```mjs +import http from 'node:http'; +const agent = new http.Agent({ keepAlive: true }); + +function retriableRequest() { + const req = http + .get('http://localhost:3000', { agent }, (res) => { + // ... + }) + .on('error', (err) => { + // Check if retry is needed + if (req.reusedSocket && err.code === 'ECONNRESET') { + retriableRequest(); + } + }); +} + +retriableRequest(); +``` + +```cjs const http = require('node:http'); const agent = new http.Agent({ keepAlive: true }); @@ -1153,7 +1316,22 @@ Reference to the underlying socket. Usually users will not want to access this property. In particular, the socket will not emit `'readable'` events because of how the protocol parser attaches to the socket. -```js +```mjs +import http from 'node:http'; +const options = { + host: 'www.google.com', +}; +const req = http.get(options); +req.end(); +req.once('response', (res) => { + const ip = req.socket.localAddress; + const port = req.socket.localPort; + console.log(`Your IP address is ${ip} and your source port is ${port}.`); + // Consume response object +}); +``` + +```cjs const http = require('node:http'); const options = { host: 'www.google.com', @@ -1326,7 +1504,19 @@ immediately destroyed. `socket` is the [`net.Socket`][] object that the error originated from. -```js +```mjs +import http from 'node:http'; + +const server = http.createServer((req, res) => { + res.end(); +}); +server.on('clientError', (err, socket) => { + socket.end('HTTP/1.1 400 Bad Request\r\n\r\n'); +}); +server.listen(8000); +``` + +```cjs const http = require('node:http'); const server = http.createServer((req, res) => { @@ -2034,7 +2224,16 @@ this property. In particular, the socket will not emit `'readable'` events because of how the protocol parser attaches to the socket. After `response.end()`, the property is nulled. -```js +```mjs +import http from 'node:http'; +const server = http.createServer((req, res) => { + const ip = res.socket.remoteAddress; + const port = res.socket.remotePort; + res.end(`Your IP address is ${ip} and your source port is ${port}.`); +}).listen(3000); +``` + +```cjs const http = require('node:http'); const server = http.createServer((req, res) => { const ip = res.socket.remoteAddress; @@ -3304,6 +3503,20 @@ Returns a new instance of [`http.Server`][]. The `requestListener` is a function which is automatically added to the [`'request'`][] event. +```mjs +import http from 'node:http'; + +// Create a local server to receive data from +const server = http.createServer((req, res) => { + res.writeHead(200, { 'Content-Type': 'application/json' }); + res.end(JSON.stringify({ + data: 'Hello World!', + })); +}); + +server.listen(8000); +``` + ```cjs const http = require('node:http'); @@ -3318,6 +3531,23 @@ const server = http.createServer((req, res) => { server.listen(8000); ``` +```mjs +import http from 'node:http'; + +// Create a local server to receive data from +const server = http.createServer(); + +// Listen to the request event +server.on('request', (request, res) => { + res.writeHead(200, { 'Content-Type': 'application/json' }); + res.end(JSON.stringify({ + data: 'Hello World!', + })); +}); + +server.listen(8000); +``` + ```cjs const http = require('node:http'); @@ -3567,7 +3797,47 @@ the [`'response'`][] event. class. The `ClientRequest` instance is a writable stream. If one needs to upload a file with a POST request, then write to the `ClientRequest` object. -```js +```mjs +import http from 'node:http'; +import { Buffer } from 'node:buffer'; + +const postData = JSON.stringify({ + 'msg': 'Hello World!', +}); + +const options = { + hostname: 'www.google.com', + port: 80, + path: '/upload', + method: 'POST', + headers: { + 'Content-Type': 'application/json', + 'Content-Length': Buffer.byteLength(postData), + }, +}; + +const req = http.request(options, (res) => { + console.log(`STATUS: ${res.statusCode}`); + console.log(`HEADERS: ${JSON.stringify(res.headers)}`); + res.setEncoding('utf8'); + res.on('data', (chunk) => { + console.log(`BODY: ${chunk}`); + }); + res.on('end', () => { + console.log('No more data in response.'); + }); +}); + +req.on('error', (e) => { + console.error(`problem with request: ${e.message}`); +}); + +// Write data to request body +req.write(postData); +req.end(); +``` + +```cjs const http = require('node:http'); const postData = JSON.stringify({ @@ -3775,7 +4045,19 @@ Examples: Example: -```js +```mjs +import { validateHeaderName } from 'node:http'; + +try { + validateHeaderName(''); +} catch (err) { + console.error(err instanceof TypeError); // --> true + console.error(err.code); // --> 'ERR_INVALID_HTTP_TOKEN' + console.error(err.message); // --> 'Header name must be a valid HTTP token [""]' +} +``` + +```cjs const { validateHeaderName } = require('node:http'); try { @@ -3809,7 +4091,27 @@ or response. The HTTP module will automatically validate such headers. Examples: -```js +```mjs +import { validateHeaderValue } from 'node:http'; + +try { + validateHeaderValue('x-my-header', undefined); +} catch (err) { + console.error(err instanceof TypeError); // --> true + console.error(err.code === 'ERR_HTTP_INVALID_HEADER_VALUE'); // --> true + console.error(err.message); // --> 'Invalid value "undefined" for header "x-my-header"' +} + +try { + validateHeaderValue('x-my-header', 'oʊmɪɡə'); +} catch (err) { + console.error(err instanceof TypeError); // --> true + console.error(err.code === 'ERR_INVALID_CHAR'); // --> true + console.error(err.message); // --> 'Invalid character in header content ["x-my-header"]' +} +``` + +```cjs const { validateHeaderValue } = require('node:http'); try {