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server_test.ts
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server_test.ts
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// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
import { ConnInfo, serve, serveListener, Server, serveTls } from "./server.ts";
import { mockConn as createMockConn } from "./_mock_conn.ts";
import { dirname, fromFileUrl, join, resolve } from "../path/mod.ts";
import { writeAll } from "../streams/write_all.ts";
import { readAll } from "../streams/read_all.ts";
import { deferred, delay } from "../async/mod.ts";
import {
assert,
assertEquals,
assertNotEquals,
assertRejects,
assertStrictEquals,
assertThrows,
unreachable,
} from "../testing/asserts.ts";
const moduleDir = dirname(fromFileUrl(import.meta.url));
const testdataDir = resolve(moduleDir, "testdata");
type AcceptCallSideEffect = ({
acceptCallCount,
}: {
acceptCallCount: number;
}) => void | Promise<void>;
class MockListener implements Deno.Listener {
conn: Deno.Conn;
#closed = false;
#rejectionError?: Error;
#rejectionCount: number;
#acceptCallSideEffect: AcceptCallSideEffect;
acceptCallTimes: number[] = [];
acceptCallIntervals: number[] = [];
acceptCallCount = 0;
constructor({
conn,
rejectionError,
rejectionCount = Infinity,
acceptCallSideEffect = () => {},
}: {
conn: Deno.Conn;
rejectionError?: Error;
rejectionCount?: number;
acceptCallSideEffect?: AcceptCallSideEffect;
}) {
this.conn = conn;
this.#rejectionError = rejectionError;
this.#rejectionCount = rejectionCount;
this.#acceptCallSideEffect = acceptCallSideEffect;
}
get addr(): Deno.Addr {
return this.conn.localAddr;
}
get rid(): number {
return 4505;
}
#shouldReject(): boolean {
return (
typeof this.#rejectionError !== "undefined" &&
this.acceptCallCount <= this.#rejectionCount
);
}
async accept(): Promise<Deno.Conn> {
if (this.#closed) {
throw new Deno.errors.BadResource("MockListener has closed");
}
const now = performance.now();
this.acceptCallIntervals.push(now - (this.acceptCallTimes.at(-1) ?? now));
this.acceptCallTimes.push(now);
this.acceptCallCount++;
this.#acceptCallSideEffect({ acceptCallCount: this.acceptCallCount });
await delay(0);
return this.#shouldReject()
? Promise.reject(this.#rejectionError)
: Promise.resolve(this.conn);
}
close() {
this.#closed = true;
}
async *[Symbol.asyncIterator](): AsyncIterableIterator<Deno.Conn> {
while (true) {
if (this.#closed) {
break;
}
const now = performance.now();
this.acceptCallIntervals.push(now - (this.acceptCallTimes.at(-1) ?? now));
this.acceptCallTimes.push(now);
this.acceptCallCount++;
this.#acceptCallSideEffect({ acceptCallCount: this.acceptCallCount });
await delay(0);
if (this.#shouldReject()) {
throw this.#rejectionError;
}
yield this.conn;
}
}
ref() {
}
unref() {
}
}
Deno.test(
"Server.addrs should expose the addresses the server is listening on",
async () => {
const listenerOneOptions = {
hostname: "127.0.0.1",
port: 4505,
};
const listenerTwoOptions = {
hostname: "127.0.0.1",
port: 8080,
};
const listenerOne = Deno.listen(listenerOneOptions);
const listenerTwo = Deno.listen(listenerTwoOptions);
const addrHostname = "0.0.0.0";
const addrPort = 3000;
const handler = () => new Response();
const server = new Server({
port: addrPort,
hostname: addrHostname,
handler,
});
const servePromiseOne = server.serve(listenerOne);
const servePromiseTwo = server.serve(listenerTwo);
const servePromiseThree = server.listenAndServe();
try {
assertEquals(server.addrs.length, 3);
assertEquals(server.addrs[0].transport, "tcp");
assertEquals(
(server.addrs[0] as Deno.NetAddr).hostname,
listenerOneOptions.hostname,
);
assertEquals(
(server.addrs[0] as Deno.NetAddr).port,
listenerOneOptions.port,
);
assertEquals(server.addrs[1].transport, "tcp");
assertEquals(
(server.addrs[1] as Deno.NetAddr).hostname,
listenerTwoOptions.hostname,
);
assertEquals(
(server.addrs[1] as Deno.NetAddr).port,
listenerTwoOptions.port,
);
assertEquals(server.addrs[2].transport, "tcp");
assertEquals((server.addrs[2] as Deno.NetAddr).hostname, addrHostname);
assertEquals((server.addrs[2] as Deno.NetAddr).port, addrPort);
} finally {
server.close();
await servePromiseOne;
await servePromiseTwo;
await servePromiseThree;
}
},
);
Deno.test("Server.closed should expose whether it is closed", () => {
const handler = () => new Response();
const server = new Server({ handler });
try {
assertEquals(server.closed, false);
} finally {
server.close();
assertEquals(server.closed, true);
}
});
Deno.test(
"Server.close should throw an error if the server is already closed",
() => {
const handler = () => new Response();
const server = new Server({ handler });
server.close();
assertThrows(() => server.close(), Deno.errors.Http, "Server closed");
},
);
Deno.test(
"Server.serve should throw an error if the server is already closed",
async () => {
const handler = () => new Response();
const server = new Server({ handler });
server.close();
const listenOptions = {
hostname: "localhost",
port: 4505,
};
const listener = Deno.listen(listenOptions);
await assertRejects(
() => server.serve(listener),
Deno.errors.Http,
"Server closed",
);
try {
listener.close();
} catch (error) {
if (!(error instanceof Deno.errors.BadResource)) {
throw error;
}
}
},
);
Deno.test(
"Server.listenAndServe should throw an error if the server is already closed",
async () => {
const handler = () => new Response();
const server = new Server({ handler });
server.close();
await assertRejects(
() => server.listenAndServe(),
Deno.errors.Http,
"Server closed",
);
},
);
Deno.test(
"Server.listenAndServeTls should throw an error if the server is already closed",
async () => {
const handler = () => new Response();
const server = new Server({ handler });
server.close();
const certFile = join(testdataDir, "tls/localhost.crt");
const keyFile = join(testdataDir, "tls/localhost.key");
await assertRejects(
() => server.listenAndServeTls(certFile, keyFile),
Deno.errors.Http,
"Server closed",
);
},
);
Deno.test(
"serveListener should not overwrite an abort signal handler",
async () => {
const listenOptions = {
hostname: "localhost",
port: 4505,
};
const listener = Deno.listen(listenOptions);
const handler = () => new Response();
const onAbort = () => {};
const abortController = new AbortController();
abortController.signal.onabort = onAbort;
const servePromise = serveListener(listener, handler, {
signal: abortController.signal,
});
try {
assertStrictEquals(abortController.signal.onabort, onAbort);
} finally {
abortController.abort();
await servePromise;
}
},
);
Deno.test(
"serve should not overwrite an abort signal handler",
async () => {
const handler = () => new Response();
const onAbort = () => {};
const abortController = new AbortController();
abortController.signal.onabort = onAbort;
const servePromise = serve(handler, {
hostname: "localhost",
port: 4505,
signal: abortController.signal,
});
try {
assertStrictEquals(abortController.signal.onabort, onAbort);
} finally {
abortController.abort();
await servePromise;
}
},
);
Deno.test(
"serveTls should not overwrite an abort signal handler",
async () => {
const certFile = join(testdataDir, "tls/localhost.crt");
const keyFile = join(testdataDir, "tls/localhost.key");
const handler = () => new Response();
const onAbort = () => {};
const abortController = new AbortController();
abortController.signal.onabort = onAbort;
const servePromise = serveTls(handler, {
hostname: "localhost",
port: 4505,
certFile,
keyFile,
signal: abortController.signal,
});
try {
assertStrictEquals(abortController.signal.onabort, onAbort);
} finally {
abortController.abort();
await servePromise;
}
},
);
Deno.test(
"serveListener should not throw if abort when the server is already closed",
async () => {
const listenOptions = {
hostname: "localhost",
port: 4505,
};
const listener = Deno.listen(listenOptions);
const handler = () => new Response();
const abortController = new AbortController();
const servePromise = serveListener(listener, handler, {
signal: abortController.signal,
});
abortController.abort();
try {
abortController.abort();
} finally {
await servePromise;
}
},
);
Deno.test(
"serve should not throw if abort when the server is already closed",
async () => {
const handler = () => new Response();
const abortController = new AbortController();
const servePromise = serve(handler, {
hostname: "localhost",
port: 4505,
signal: abortController.signal,
});
abortController.abort();
try {
abortController.abort();
} finally {
await servePromise;
}
},
);
Deno.test(
"serveTls should not throw if abort when the server is already closed",
async () => {
const certFile = join(testdataDir, "tls/localhost.crt");
const keyFile = join(testdataDir, "tls/localhost.key");
const handler = () => new Response();
const abortController = new AbortController();
const servePromise = serveTls(handler, {
hostname: "localhost",
port: 4505,
certFile,
keyFile,
signal: abortController.signal,
});
abortController.abort();
try {
abortController.abort();
} finally {
await servePromise;
}
},
);
Deno.test(`Server.serve should response with internal server error if response body is already consumed`, async () => {
const listenOptions = {
hostname: "localhost",
port: 4505,
};
const listener = Deno.listen(listenOptions);
const url = `http://${listenOptions.hostname}:${listenOptions.port}`;
const body = "Internal Server Error";
const status = 500;
async function handler() {
const response = new Response("Hello, world!");
await response.text();
return response;
}
const server = new Server({ handler });
const servePromise = server.serve(listener);
try {
const response = await fetch(url);
assertEquals(await response.text(), body);
assertEquals(response.status, status);
} finally {
server.close();
await servePromise;
}
});
Deno.test(`Server.serve should handle requests`, async () => {
const listenOptions = {
hostname: "localhost",
port: 4505,
};
const listener = Deno.listen(listenOptions);
const url = `http://${listenOptions.hostname}:${listenOptions.port}`;
const status = 418;
const method = "GET";
const body = `${method}: ${url} - Hello Deno on HTTP!`;
const handler = () => new Response(body, { status });
const server = new Server({ handler });
const servePromise = server.serve(listener);
try {
const response = await fetch(url, { method });
assertEquals(await response.text(), body);
assertEquals(response.status, status);
} finally {
server.close();
await servePromise;
}
});
Deno.test(`Server.listenAndServe should handle requests`, async () => {
const hostname = "localhost";
const port = 4505;
const url = `http://${hostname}:${port}`;
const status = 418;
const method = "POST";
const body = `${method}: ${url} - Hello Deno on HTTP!`;
const handler = () => new Response(body, { status });
const server = new Server({ hostname, port, handler });
const servePromise = server.listenAndServe();
try {
const response = await fetch(url, { method });
assertEquals(await response.text(), body);
assertEquals(response.status, status);
} finally {
server.close();
await servePromise;
}
});
Deno.test({
// PermissionDenied: Permission denied (os error 13)
// Will pass if run as root user.
ignore: true,
name: `Server.listenAndServe should handle requests on the default HTTP port`,
fn: async () => {
const addr = "localhost";
const url = `http://${addr}`;
const status = 418;
const method = "PATCH";
const body = `${method}: ${url} - Hello Deno on HTTP!`;
const handler = () => new Response(body, { status });
const server = new Server({ hostname: addr, handler });
const servePromise = server.listenAndServe();
try {
const response = await fetch(url, { method });
assertEquals(await response.text(), body);
assertEquals(response.status, status);
} finally {
server.close();
await servePromise;
}
},
});
Deno.test(`Server.listenAndServeTls should handle requests`, async () => {
const hostname = "localhost";
const port = 4505;
const addr = `${hostname}:${port}`;
const certFile = join(testdataDir, "tls/localhost.crt");
const keyFile = join(testdataDir, "tls/localhost.key");
const url = `http://${addr}`;
const status = 418;
const method = "DELETE";
const body = `${method}: ${url} - Hello Deno on HTTPS!`;
const handler = () => new Response(body, { status });
const server = new Server({ hostname, port, handler });
const servePromise = server.listenAndServeTls(certFile, keyFile);
try {
// Invalid certificate, connection should throw on first read or write
// but should not crash the server.
const badConn = await Deno.connectTls({
hostname,
port,
// missing certFile
});
await assertRejects(
() => badConn.read(new Uint8Array(1)),
Deno.errors.InvalidData,
"invalid peer certificate contents: invalid peer certificate: UnknownIssuer",
"Read with missing certFile didn't throw an InvalidData error when it should have.",
);
badConn.close();
// Valid request after invalid
const conn = await Deno.connectTls({
hostname,
port,
certFile: join(testdataDir, "tls/RootCA.pem"),
});
await writeAll(
conn,
new TextEncoder().encode(`${method.toUpperCase()} / HTTP/1.0\r\n\r\n`),
);
const response = new TextDecoder().decode(await readAll(conn));
conn.close();
assert(response.includes(`HTTP/1.0 ${status}`), "Status code not correct");
assert(response.includes(body), "Response body not correct");
} finally {
server.close();
await servePromise;
}
});
Deno.test({
// PermissionDenied: Permission denied (os error 13)
// Will pass if run as root user.
ignore: true,
name:
`Server.listenAndServeTls should handle requests on the default HTTPS port`,
fn: async () => {
const hostname = "localhost";
const port = 443;
const addr = hostname;
const certFile = join(testdataDir, "tls/localhost.crt");
const keyFile = join(testdataDir, "tls/localhost.key");
const url = `http://${addr}`;
const status = 418;
const method = "PUT";
const body = `${method}: ${url} - Hello Deno on HTTPS!`;
const handler = () => new Response(body, { status });
const server = new Server({ hostname, port, handler });
const servePromise = server.listenAndServeTls(certFile, keyFile);
try {
// Invalid certificate, connection should throw on first read or write
// but should not crash the server.
const badConn = await Deno.connectTls({
hostname,
port,
// missing certFile
});
await assertRejects(
() => badConn.read(new Uint8Array(1)),
Deno.errors.InvalidData,
"invalid peer certificate contents: invalid peer certificate: UnknownIssuer",
"Read with missing certFile didn't throw an InvalidData error when it should have.",
);
badConn.close();
// Valid request after invalid
const conn = await Deno.connectTls({
hostname,
port,
certFile: join(testdataDir, "tls/RootCA.pem"),
});
await writeAll(
conn,
new TextEncoder().encode(`${method.toUpperCase()} / HTTP/1.0\r\n\r\n`),
);
const response = new TextDecoder().decode(await readAll(conn));
conn.close();
assert(
response.includes(`HTTP/1.0 ${status}`),
"Status code not correct",
);
assert(response.includes(body), "Response body not correct");
} finally {
server.close();
await servePromise;
}
},
});
Deno.test(`serve should handle requests`, async () => {
const listenOptions = {
hostname: "localhost",
port: 4505,
};
const listener = Deno.listen(listenOptions);
const url = `http://${listenOptions.hostname}:${listenOptions.port}`;
const status = 418;
const method = "GET";
const body = `${method}: ${url} - Hello Deno on HTTP!`;
const handler = () => new Response(body, { status });
const abortController = new AbortController();
const servePromise = serveListener(listener, handler, {
signal: abortController.signal,
});
try {
const response = await fetch(url, { method });
assertEquals(await response.text(), body);
assertEquals(response.status, status);
} finally {
abortController.abort();
await servePromise;
}
});
Deno.test(`serve should handle requests`, async () => {
const hostname = "localhost";
const port = 4505;
const url = `http://${hostname}:${port}`;
const status = 418;
const method = "POST";
const body = `${method}: ${url} - Hello Deno on HTTP!`;
const handler = () => new Response(body, { status });
const abortController = new AbortController();
const servePromise = serve(handler, {
hostname,
port,
signal: abortController.signal,
});
try {
const response = await fetch(url, { method });
assertEquals(await response.text(), body);
assertEquals(response.status, status);
} finally {
abortController.abort();
await servePromise;
}
});
Deno.test(`serve listens on the port 8000 by default`, async () => {
const url = "http://localhost:8000";
const body = "Hello from port 8000";
const handler = () => new Response(body);
const abortController = new AbortController();
const servePromise = serve(handler, {
signal: abortController.signal,
});
servePromise.catch(() => {});
try {
const response = await fetch(url);
assertEquals(await response.text(), body);
} finally {
abortController.abort();
await servePromise;
}
});
Deno.test(`serve should handle websocket requests`, async () => {
const hostname = "localhost";
const port = 4505;
const url = `ws://${hostname}:${port}`;
const message = `${url} - Hello Deno on WebSocket!`;
const abortController = new AbortController();
const servePromise = serve(
(request) => {
const { socket, response } = Deno.upgradeWebSocket(request);
// Return the received message as it is
socket.onmessage = (event) => socket.send(event.data);
return response;
},
{
hostname,
port,
signal: abortController.signal,
},
);
const ws = new WebSocket(url);
try {
ws.onopen = () => ws.send(message);
const response = await new Promise((resolve) => {
ws.onmessage = (event) => resolve(event.data);
});
assertEquals(response, message);
} finally {
ws.close();
abortController.abort();
await servePromise;
}
});
Deno.test(`Server.listenAndServeTls should handle requests`, async () => {
const hostname = "localhost";
const port = 4505;
const addr = `${hostname}:${port}`;
const certFile = join(testdataDir, "tls/localhost.crt");
const keyFile = join(testdataDir, "tls/localhost.key");
const url = `http://${addr}`;
const status = 418;
const method = "PATCH";
const body = `${method}: ${url} - Hello Deno on HTTPS!`;
const handler = () => new Response(body, { status });
const abortController = new AbortController();
const servePromise = serveTls(handler, {
hostname,
port,
certFile,
keyFile,
signal: abortController.signal,
});
try {
// Invalid certificate, connection should throw on first read or write
// but should not crash the server.
const badConn = await Deno.connectTls({
hostname,
port,
// missing certFile
});
await assertRejects(
() => badConn.read(new Uint8Array(1)),
Deno.errors.InvalidData,
"invalid peer certificate contents: invalid peer certificate: UnknownIssuer",
"Read with missing certFile didn't throw an InvalidData error when it should have.",
);
badConn.close();
// Valid request after invalid
const conn = await Deno.connectTls({
hostname,
port,
certFile: join(testdataDir, "tls/RootCA.pem"),
});
await writeAll(
conn,
new TextEncoder().encode(`${method.toUpperCase()} / HTTP/1.0\r\n\r\n`),
);
const response = new TextDecoder().decode(await readAll(conn));
conn.close();
assert(response.includes(`HTTP/1.0 ${status}`), "Status code not correct");
assert(response.includes(body), "Response body not correct");
} finally {
abortController.abort();
await servePromise;
}
});
Deno.test(
"Server should not reject when the listener is closed (though the server will continually try and fail to accept connections on the listener until it is closed)",
async () => {
const listener = Deno.listen({ port: 4505 });
const handler = () => new Response();
const server = new Server({ handler });
listener.close();
let servePromise;
try {
servePromise = server.serve(listener);
await delay(10);
} finally {
server.close();
await servePromise;
}
},
);
Deno.test(
"Server should not reject when there is a tls handshake with tcp corruption",
async () => {
const conn = createMockConn();
const rejectionError = new Deno.errors.InvalidData(
"test-tcp-corruption-error",
);
const listener = new MockListener({ conn, rejectionError });
const handler = () => new Response();
const server = new Server({ handler });
let servePromise;
try {
servePromise = server.serve(listener);
await delay(10);
} finally {
server.close();
await servePromise;
}
},
);
Deno.test(
"Server should not reject when the tls session is aborted",
async () => {
const conn = createMockConn();
const rejectionError = new Deno.errors.ConnectionReset(
"test-tls-session-aborted-error",
);
const listener = new MockListener({ conn, rejectionError });
const handler = () => new Response();
const server = new Server({ handler });
let servePromise;
try {
servePromise = server.serve(listener);
await delay(10);
} finally {
server.close();
await servePromise;
}
},
);
Deno.test("Server should not reject when the socket is closed", async () => {
const conn = createMockConn();
const rejectionError = new Deno.errors.NotConnected(
"test-socket-closed-error",
);
const listener = new MockListener({ conn, rejectionError });
const handler = () => new Response();
const server = new Server({ handler });
let servePromise;
try {
servePromise = server.serve(listener);
await delay(10);
} finally {
server.close();
await servePromise;
}
});
Deno.test(
"Server should implement a backoff delay when accepting a connection throws an expected error and reset the backoff when successfully accepting a connection again",
async () => {
// acceptDelay(n) = 5 * 2^n for n=0...7 capped at 1000 afterwards.
const expectedBackoffDelays = [
5,
10,
20,
40,
80,
160,
320,
640,
1000,
1000,
];
const rejectionCount = expectedBackoffDelays.length;
let resolver: (value: unknown) => void;
// Construct a promise we know will only resolve after listener.accept() has
// been called enough times to assert on our expected backoff delays, i.e.
// the number of rejections + 1 success.
const expectedBackoffDelaysCompletedPromise = new Promise((resolve) => {
resolver = resolve;
});
const acceptCallSideEffect = ({
acceptCallCount,
}: {
acceptCallCount: number;
}) => {
if (acceptCallCount > rejectionCount + 1) {
resolver(undefined);
}
};
const conn = createMockConn();
const rejectionError = new Deno.errors.NotConnected(
"test-socket-closed-error",
);
const listener = new MockListener({
conn,
rejectionError,
rejectionCount,
acceptCallSideEffect,
});
const handler = () => new Response();
const server = new Server({ handler });
const servePromise = server.serve(listener);
// Wait for all the expected failures / backoff periods to have completed.
await expectedBackoffDelaysCompletedPromise;
server.close();
await servePromise;
listener.acceptCallIntervals.shift();
console.log("\n Accept call intervals vs expected backoff intervals:");
console.table(
listener.acceptCallIntervals.map((col, i) => [
col,
expectedBackoffDelays[i] ?? "<1000, reset",
]),
);
// Assert that the time between the accept calls is greater than or equal to
// the expected backoff delay.
for (let i = 0; i < rejectionCount; i++) {
assertEquals(
listener.acceptCallIntervals[i] >= expectedBackoffDelays[i],
true,
);
}
// Assert that the backoff delay has been reset following successfully
// accepting a connection, i.e. it doesn't remain at 1000ms.
assertEquals(listener.acceptCallIntervals[rejectionCount] < 1000, true);
},
);
Deno.test("Server should not leak async ops when closed", () => {
const hostname = "127.0.0.1";
const port = 4505;
const handler = () => new Response();
const server = new Server({ port, hostname, handler });
server.listenAndServe();