From 2f1abed2e28c2815ce0160f1c2d7d68253329bce Mon Sep 17 00:00:00 2001 From: Damien Arrachequesne Date: Thu, 1 Oct 2020 15:09:24 +0200 Subject: [PATCH 1/3] docs: clarify the session examples --- README.md | 32 +++++++++++++++++++++++++++++++- 1 file changed, 31 insertions(+), 1 deletion(-) diff --git a/README.md b/README.md index bc13e765..bfc2eddb 100644 --- a/README.md +++ b/README.md @@ -10,6 +10,8 @@ Table of Contents: - [Revision](#revision) - [Anatomy of an Engine.IO session](#anatomy-of-an-engineio-session) + - [Sample session](#sample-session) + - [Sample session with WebSocket only](#sample-session-with-websocket-only) - [URLs](#urls) - [Encoding](#encoding) - [Packet](#packet) @@ -52,7 +54,7 @@ with `pong` packets. 5. Polling transports can send a `close` packet to close the socket, since they're expected to be "opening" and "closing" all the time. -Example: +### Sample session - Request n°1 (open packet) @@ -72,8 +74,12 @@ Details: {"sid":... => the handshake data ``` +Note: the `t` query param is used to ensure that the request is not cached by the browser. + - Request n°2 (message in): +`socket.send('hey')` is executed on the server: + ``` GET /engine.io/?EIO=3&transport=polling&t=N8hyd7H&sid=lv_VI97HAXpY6yYWAAAC < HTTP/1.1 200 OK @@ -92,6 +98,8 @@ hey => the actual message - Request n°3 (message out) +`socket.send('hello'); socket.send('world');` is executed on the client: + ``` POST /engine.io/?EIO=3&transport=polling&t=N8hzxke&sid=lv_VI97HAXpY6yYWAAAC > Content-Type: text/plain; charset=UTF-8 @@ -134,6 +142,28 @@ WebSocket frames: > 1 => "close" packet type ``` +### Sample session with WebSocket only + +In that case, the client only enables WebSocket (without HTTP polling). + +``` +GET /engine.io/?EIO=3&transport=websocket +< HTTP/1.1 101 Switching Protocols +``` + +WebSocket frames: + +``` +< 0{"sid":"lv_VI97HAXpY6yYWAAAC","pingInterval":25000,"pingTimeout":5000} => handshake +< 4hey +> 4hello => message (not concatenated) +> 4world +< 2 => "ping" packet type +> 3 => "pong" packet type +> 1 => "close" packet type +``` + + ## URLs An Engine.IO url is composed as follows: From 723c7bab4d463f49c114ff7f2fefdaaad2379104 Mon Sep 17 00:00:00 2001 From: Sleeyax Date: Wed, 28 Jun 2023 22:45:46 +0200 Subject: [PATCH 2/3] docs: add test suite (#45) --- README.md | 32 + test-suite/.gitignore | 1 + test-suite/index.html | 30 + test-suite/node-imports.js | 10 + test-suite/package-lock.json | 1936 ++++++++++++++++++++++++++++++++++ test-suite/package.json | 18 + test-suite/test-suite.js | 595 +++++++++++ 7 files changed, 2622 insertions(+) create mode 100755 test-suite/.gitignore create mode 100644 test-suite/index.html create mode 100644 test-suite/node-imports.js create mode 100644 test-suite/package-lock.json create mode 100644 test-suite/package.json create mode 100644 test-suite/test-suite.js diff --git a/README.md b/README.md index bfc2eddb..11a3780f 100644 --- a/README.md +++ b/README.md @@ -31,6 +31,7 @@ Table of Contents: - [Transport upgrading](#transport-upgrading) - [Timeouts](#timeouts) - [Difference between v2 and v3](#difference-between-v2-and-v3) +- [Test suite](#test-suite) ## Revision @@ -511,3 +512,34 @@ does not receive any data within `pingTimeout + pingInterval`. - add support for binary data v2 is included in Socket.IO v0.9, while v3 is included in Socket.IO v1/v2. + +## Test suite + +The test suite in the `test-suite/` directory lets you check the compliance of a server implementation. + +Usage: + +- in Node.js: `npm ci && npm test` +- in a browser: simply open the `index.html` file in your browser + +For reference, here is expected configuration for the JavaScript server to pass all tests: + +```js +import { listen } from "engine.io"; + +const server = listen(3000, { + pingInterval: 300, + pingTimeout: 200, + allowEIO3: true, + maxPayload: 1e6, + cors: { + origin: "*" + } +}); + +server.on("connection", socket => { + socket.on("data", (...args) => { + socket.send(...args); + }); +}); +``` diff --git a/test-suite/.gitignore b/test-suite/.gitignore new file mode 100755 index 00000000..3c3629e6 --- /dev/null +++ b/test-suite/.gitignore @@ -0,0 +1 @@ +node_modules diff --git a/test-suite/index.html b/test-suite/index.html new file mode 100644 index 00000000..1ac561c0 --- /dev/null +++ b/test-suite/index.html @@ -0,0 +1,30 @@ + + + + + + + Test suite for the Engine.IO protocol + + + + +
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make the tests runnable in both the browser and Node.js + await import("./node-imports.js"); +} + +const { expect } = chai; + +const URL = "http://localhost:3000"; +const WS_URL = URL.replace("http", "ws"); + +const PING_INTERVAL = 300; +const PING_TIMEOUT = 200; + +function sleep(delay) { + return new Promise((resolve) => setTimeout(resolve, delay)); +} + +function waitFor(socket, eventType) { + return new Promise((resolve) => { + socket.addEventListener( + eventType, + (event) => { + resolve(event); + }, + { once: true } + ); + }); +} + +function decodePayload(payload) { + const firstColonIndex = payload.indexOf(":"); + const length = payload.substring(0, firstColonIndex); + const packet = payload.substring(firstColonIndex + 1); + return [length, packet]; +} + +async function initLongPollingSession(supportsBinary = false) { + const response = await fetch(`${URL}/engine.io/?EIO=3&transport=polling` + (supportsBinary ? "" : "&b64=1")); + const text = await response.text(); + const [, content] = decodePayload(text); + return JSON.parse(content.substring(1)).sid; +} + +describe("Engine.IO protocol", () => { + describe("handshake", () => { + describe("HTTP long-polling", () => { + it("successfully opens a session", async () => { + const response = await fetch( + `${URL}/engine.io/?EIO=3&transport=polling` + ); + + expect(response.status).to.eql(200); + + const text = await response.text(); + const [length, content] = decodePayload(text); + + expect(length).to.eql(content.length.toString()); + expect(content).to.startsWith("0"); + + const value = JSON.parse(content.substring(1)); + + expect(value.sid).to.be.a("string"); + expect(value.upgrades).to.eql(["websocket"]); + expect(value.pingInterval).to.eql(PING_INTERVAL); + expect(value.pingTimeout).to.eql(PING_TIMEOUT); + expect(value.maxPayload).to.be.oneOf([undefined, 1000000]); + }); + + it("fails with an invalid 'transport' query parameter", async () => { + const response = await fetch(`${URL}/engine.io/?EIO=3`); + + expect(response.status).to.eql(400); + + const response2 = await fetch(`${URL}/engine.io/?EIO=3&transport=abc`); + + expect(response2.status).to.eql(400); + }); + + it("fails with an invalid request method", async () => { + const response = await fetch( + `${URL}/engine.io/?EIO=3&transport=polling`, + { + method: "post", + } + ); + + expect(response.status).to.eql(400); + }); + }); + + describe("WebSocket", () => { + it("successfully opens a session", async () => { + const socket = new WebSocket( + `${WS_URL}/engine.io/?EIO=3&transport=websocket` + ); + + const { data } = await waitFor(socket, "message"); + + expect(data).to.startsWith("0"); + + const value = JSON.parse(data.substring(1)); + + expect(value.sid).to.be.a("string"); + expect(value.upgrades).to.eql([]); + expect(value.pingInterval).to.eql(PING_INTERVAL); + expect(value.pingTimeout).to.eql(PING_TIMEOUT); + expect(value.maxPayload).to.be.oneOf([undefined, 1000000]); + + socket.close(); + }); + + it("fails with an invalid 'EIO' query parameter", async () => { + const socket = new WebSocket( + `${WS_URL}/engine.io/?transport=websocket` + ); + + if (isNodejs) { + socket.on("error", () => {}); + } + + waitFor(socket, "close"); + + const socket2 = new WebSocket( + `${WS_URL}/engine.io/?EIO=abc&transport=websocket` + ); + + if (isNodejs) { + socket2.on("error", () => {}); + } + + waitFor(socket2, "close"); + }); + + it("fails with an invalid 'transport' query parameter", async () => { + const socket = new WebSocket(`${WS_URL}/engine.io/?EIO=3`); + + if (isNodejs) { + socket.on("error", () => {}); + } + + waitFor(socket, "close"); + + const socket2 = new WebSocket( + `${WS_URL}/engine.io/?EIO=3&transport=abc` + ); + + if (isNodejs) { + socket2.on("error", () => {}); + } + + waitFor(socket2, "close"); + }); + }); + }); + + describe("message", () => { + describe("HTTP long-polling", () => { + it("sends and receives a payload containing one plain text packet", async () => { + const sid = await initLongPollingSession(); + + const pushResponse = await fetch( + `${URL}/engine.io/?EIO=3&transport=polling&sid=${sid}`, + { + method: "post", + body: "6:4hello", + } + ); + + expect(pushResponse.status).to.eql(200); + + const postContent = await pushResponse.text(); + + expect(postContent).to.eql("ok"); + + const pollResponse = await fetch( + `${URL}/engine.io/?EIO=3&transport=polling&sid=${sid}` + ); + + expect(pollResponse.status).to.eql(200); + + const pollContent = await pollResponse.text(); + + expect(pollContent).to.eql("6:4hello"); + }); + + it("sends and receives a payload containing several plain text packets", async () => { + const sid = await initLongPollingSession(); + + const pushResponse = await fetch( + `${URL}/engine.io/?EIO=3&transport=polling&sid=${sid}`, + { + method: "post", + body: "6:4test16:4test26:4test3", + } + ); + + expect(pushResponse.status).to.eql(200); + + const postContent = await pushResponse.text(); + + expect(postContent).to.eql("ok"); + + const pollResponse = await fetch( + `${URL}/engine.io/?EIO=3&transport=polling&sid=${sid}` + ); + + expect(pollResponse.status).to.eql(200); + + const pollContent = await pollResponse.text(); + + expect(pollContent).to.eql("6:4test16:4test26:4test3"); + }); + + it("sends and receives a payload containing plain text and binary packets (base64 encoded)", async () => { + const sid = await initLongPollingSession(); + + const pushResponse = await fetch( + `${URL}/engine.io/?EIO=3&transport=polling&sid=${sid}`, + { + method: "post", + body: "6:4hello10:b4AQIDBA==", + } + ); + + expect(pushResponse.status).to.eql(200); + + const postContent = await pushResponse.text(); + + expect(postContent).to.eql("ok"); + + const pollResponse = await fetch( + `${URL}/engine.io/?EIO=3&transport=polling&sid=${sid}` + ); + + expect(pollResponse.status).to.eql(200); + + const pollContent = await pollResponse.text(); + + expect(pollContent).to.eql("6:4hello10:b4AQIDBA=="); + }); + + it("sends and receives a payload containing plain text and binary packets (binary)", async () => { + const sid = await initLongPollingSession(true); + + const pushResponse = await fetch( + `${URL}/engine.io/?EIO=3&transport=polling&sid=${sid}`, + { + method: "post", + body: "6:4hello10:b4AQIDBA==", + } + ); + + expect(pushResponse.status).to.eql(200); + + const postContent = await pushResponse.text(); + + expect(postContent).to.eql("ok"); + + const pollResponse = await fetch( + `${URL}/engine.io/?EIO=3&transport=polling&sid=${sid}` + ); + + expect(pollResponse.status).to.eql(200); + + const buffer = await pollResponse.arrayBuffer(); + + // 0 => string + // 6 => byte length + // 255 => delimiter + // 52 => 4 (MESSAGE packet type) + // 104 101 108 108 111 => "hello" + // 1 => binary + // 5 => byte length + // 255 => delimiter + // 4 => 4 (MESSAGE packet type) + // 1 2 3 4 => binary message + expect(buffer).to.eql(Uint8Array.from([0, 6, 255, 52, 104, 101, 108, 108, 111, 1, 5, 255, 4, 1, 2, 3, 4]).buffer); + }); + + it("closes the session upon invalid packet format", async () => { + const sid = await initLongPollingSession(); + + try { + const pushResponse = await fetch( + `${URL}/engine.io/?EIO=3&transport=polling&sid=${sid}`, + { + method: "post", + body: "abc", + } + ); + + expect(pushResponse.status).to.eql(400); + } catch (e) { + // node-fetch throws when the request is closed abnormally + } + + const pollResponse = await fetch( + `${URL}/engine.io/?EIO=3&transport=polling&sid=${sid}` + ); + + expect(pollResponse.status).to.eql(400); + }); + + // FIXME CORS error + it.skip("closes the session upon duplicate poll requests", async () => { + const sid = await initLongPollingSession(); + + const pollResponses = await Promise.all([ + fetch(`${URL}/engine.io/?EIO=3&transport=polling&sid=${sid}`), + sleep(5).then(() => fetch(`${URL}/engine.io/?EIO=3&transport=polling&sid=${sid}&t=burst`)), + ]); + + expect(pollResponses[0].status).to.eql(200); + + const content = await pollResponses[0].text(); + + expect(content).to.eql("1:1"); + + // the Node.js implementation uses HTTP 500 (Internal Server Error), but HTTP 400 seems more suitable + expect(pollResponses[1].status).to.be.oneOf([400, 500]); + + const pollResponse = await fetch( + `${URL}/engine.io/?EIO=3&transport=polling&sid=${sid}` + ); + + expect(pollResponse.status).to.eql(500); + }); + }); + + describe("WebSocket", () => { + it("sends and receives a plain text packet", async () => { + const socket = new WebSocket( + `${WS_URL}/engine.io/?EIO=3&transport=websocket` + ); + + await waitFor(socket, "open"); + + await waitFor(socket, "message"); // handshake + + socket.send("4hello"); + + const { data } = await waitFor(socket, "message"); + + expect(data).to.eql("4hello"); + + socket.close(); + }); + + it("sends and receives a binary packet", async () => { + const socket = new WebSocket( + `${WS_URL}/engine.io/?EIO=3&transport=websocket` + ); + socket.binaryType = "arraybuffer"; + + await waitFor(socket, "message"); // handshake + + socket.send(Uint8Array.from([4, 1, 2, 3, 4])); + + const { data } = await waitFor(socket, "message"); + + expect(data).to.eql(Uint8Array.from([4, 1, 2, 3, 4]).buffer); + + socket.close(); + }); + + it("closes the session upon invalid packet format", async () => { + const socket = new WebSocket( + `${WS_URL}/engine.io/?EIO=3&transport=websocket` + ); + + await waitFor(socket, "message"); // handshake + + socket.send("abc"); + + await waitFor(socket, "close"); + + socket.close(); + }); + }); + }); + + describe("heartbeat", function () { + this.timeout(5000); + + describe("HTTP long-polling", () => { + it("sends ping/pong packets", async () => { + const sid = await initLongPollingSession(); + + for (let i = 0; i < 3; i++) { + const pushResponse = await fetch( + `${URL}/engine.io/?EIO=3&transport=polling&sid=${sid}`, + { + method: "post", + body: "1:2", + } + ); + + expect(pushResponse.status).to.eql(200); + + const pollResponse = await fetch( + `${URL}/engine.io/?EIO=3&transport=polling&sid=${sid}` + ); + + expect(pollResponse.status).to.eql(200); + + const pollContent = await pollResponse.text(); + + expect(pollContent).to.eql("1:3"); + } + }); + + it("closes the session upon ping timeout", async () => { + const sid = await initLongPollingSession(); + + await sleep(PING_INTERVAL + PING_TIMEOUT); + + const pushResponse = await fetch( + `${URL}/engine.io/?EIO=3&transport=polling&sid=${sid}`, + { + method: "post", + body: "1:2", + } + ); + + expect(pushResponse.status).to.eql(400); + }); + }); + + describe("WebSocket", () => { + it("sends ping/pong packets", async () => { + const socket = new WebSocket( + `${WS_URL}/engine.io/?EIO=3&transport=websocket` + ); + + const x = await waitFor(socket, "message"); // handshake + + for (let i = 0; i < 3; i++) { + socket.send("2"); + + const { data } = await waitFor(socket, "message"); + + expect(data).to.eql("3"); + } + + socket.close(); + }); + + it("closes the session upon ping timeout", async () => { + const socket = new WebSocket( + `${WS_URL}/engine.io/?EIO=3&transport=websocket` + ); + + await waitFor(socket, "close"); // handshake + }); + }); + }); + + describe("close", () => { + describe("HTTP long-polling", () => { + it("forcefully closes the session", async () => { + const sid = await initLongPollingSession(); + + const [pollResponse] = await Promise.all([ + fetch(`${URL}/engine.io/?EIO=3&transport=polling&sid=${sid}`), + fetch(`${URL}/engine.io/?EIO=3&transport=polling&sid=${sid}`, { + method: "post", + body: "1:1", + }), + ]); + + expect(pollResponse.status).to.eql(200); + + const pullContent = await pollResponse.text(); + + expect(pullContent).to.eql("1:6"); + + const pollResponse2 = await fetch( + `${URL}/engine.io/?EIO=3&transport=polling&sid=${sid}` + ); + + expect(pollResponse2.status).to.eql(400); + }); + }); + + describe("WebSocket", () => { + it("forcefully closes the session", async () => { + const socket = new WebSocket( + `${WS_URL}/engine.io/?EIO=3&transport=websocket` + ); + + await waitFor(socket, "message"); // handshake + + socket.send("1"); + + await waitFor(socket, "close"); + }); + }); + }); + + describe("upgrade", () => { + it("successfully upgrades from HTTP long-polling to WebSocket", async () => { + const sid = await initLongPollingSession(); + + const socket = new WebSocket( + `${WS_URL}/engine.io/?EIO=3&transport=websocket&sid=${sid}` + ); + + await waitFor(socket, "open"); + + // send probe + socket.send("2probe"); + + const probeResponse = await waitFor(socket, "message"); + + expect(probeResponse.data).to.eql("3probe"); + + const pollResponse = await fetch( + `${URL}/engine.io/?EIO=3&transport=polling&sid=${sid}` + ); + + expect(pollResponse.status).to.eql(200); + + const pollContent = await pollResponse.text(); + + expect(pollContent).to.eql("1:6"); // "noop" packet to cleanly end the HTTP long-polling request + + // complete upgrade + socket.send("5"); + + socket.send("4hello"); + + const { data } = await waitFor(socket, "message"); + + expect(data).to.eql("4hello"); + }); + + it("ignores HTTP requests with same sid after upgrade", async () => { + const sid = await initLongPollingSession(); + + const socket = new WebSocket( + `${WS_URL}/engine.io/?EIO=3&transport=websocket&sid=${sid}` + ); + + await waitFor(socket, "open"); + + socket.send("2probe"); + const res = await waitFor(socket, "message"); + expect(res.data).to.eql("3probe"); + + socket.send("5"); + + const pollResponse = await fetch( + `${URL}/engine.io/?EIO=3&transport=polling&sid=${sid}` + ); + + expect(pollResponse.status).to.eql(400); + + socket.send("4hello"); + + const { data } = await waitFor(socket, "message"); + + expect(data).to.eql("4hello"); + }); + + it("ignores WebSocket connection with same sid after upgrade", async () => { + const sid = await initLongPollingSession(); + + const socket = new WebSocket( + `${WS_URL}/engine.io/?EIO=3&transport=websocket&sid=${sid}` + ); + + await waitFor(socket, "open"); + + socket.send("2probe"); + const res = await waitFor(socket, "message"); + expect(res.data).to.eql("3probe"); + + socket.send("5"); + + const socket2 = new WebSocket( + `${WS_URL}/engine.io/?EIO=3&transport=websocket&sid=${sid}` + ); + + await waitFor(socket2, "close"); + + socket.send("4hello"); + + const { data } = await waitFor(socket, "message"); + + expect(data).to.eql("4hello"); + }); + }); +}); From 68efa280149d17daedfad6e750a2120e2f9118c6 Mon Sep 17 00:00:00 2001 From: Damien Arrachequesne Date: Mon, 8 Jul 2024 12:16:14 +0200 Subject: [PATCH 3/3] refactor: prepare the migration to a monorepo --- .gitignore | 15 --------------- .../engine.io-protocol/v3-test-suite}/.gitignore | 0 .../engine.io-protocol/v3-test-suite}/index.html | 0 .../v3-test-suite}/node-imports.js | 0 .../v3-test-suite}/package-lock.json | 0 .../v3-test-suite}/package.json | 0 .../v3-test-suite}/test-suite.js | 0 README.md => docs/engine.io-protocol/v3.md | 0 8 files changed, 15 deletions(-) delete mode 100644 .gitignore rename {test-suite => docs/engine.io-protocol/v3-test-suite}/.gitignore (100%) rename {test-suite => docs/engine.io-protocol/v3-test-suite}/index.html (100%) rename {test-suite => docs/engine.io-protocol/v3-test-suite}/node-imports.js (100%) rename {test-suite => docs/engine.io-protocol/v3-test-suite}/package-lock.json (100%) rename {test-suite => docs/engine.io-protocol/v3-test-suite}/package.json (100%) rename {test-suite => docs/engine.io-protocol/v3-test-suite}/test-suite.js (100%) rename README.md => docs/engine.io-protocol/v3.md (100%) diff --git a/.gitignore b/.gitignore deleted file mode 100644 index b3846770..00000000 --- a/.gitignore +++ /dev/null @@ -1,15 +0,0 @@ -lib-cov -*.seed -*.log -*.csv -*.dat -*.out -*.pid -*.gz - -pids -logs -results - -npm-debug.log -node_modules/* diff --git a/test-suite/.gitignore b/docs/engine.io-protocol/v3-test-suite/.gitignore similarity index 100% rename from test-suite/.gitignore rename to docs/engine.io-protocol/v3-test-suite/.gitignore diff --git a/test-suite/index.html b/docs/engine.io-protocol/v3-test-suite/index.html similarity index 100% rename from test-suite/index.html rename to docs/engine.io-protocol/v3-test-suite/index.html diff --git a/test-suite/node-imports.js b/docs/engine.io-protocol/v3-test-suite/node-imports.js similarity index 100% rename from test-suite/node-imports.js rename to docs/engine.io-protocol/v3-test-suite/node-imports.js diff --git a/test-suite/package-lock.json b/docs/engine.io-protocol/v3-test-suite/package-lock.json similarity index 100% rename from test-suite/package-lock.json rename to docs/engine.io-protocol/v3-test-suite/package-lock.json diff --git a/test-suite/package.json b/docs/engine.io-protocol/v3-test-suite/package.json similarity index 100% rename from test-suite/package.json rename to docs/engine.io-protocol/v3-test-suite/package.json diff --git a/test-suite/test-suite.js b/docs/engine.io-protocol/v3-test-suite/test-suite.js similarity index 100% rename from test-suite/test-suite.js rename to docs/engine.io-protocol/v3-test-suite/test-suite.js diff --git a/README.md b/docs/engine.io-protocol/v3.md similarity index 100% rename from README.md rename to docs/engine.io-protocol/v3.md