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feat: Add corsPreFlight option (#140)
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javierbrea committed Mar 23, 2021
1 parent a59197f commit dcb7f62
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Showing 6 changed files with 88 additions and 9 deletions.
4 changes: 3 additions & 1 deletion src/Orchestrator.js
Original file line number Diff line number Diff line change
Expand Up @@ -36,10 +36,12 @@ class Orchestrator {
if (
changeDetails.hasOwnProperty("port") ||
changeDetails.hasOwnProperty("host") ||
changeDetails.hasOwnProperty("cors")
changeDetails.hasOwnProperty("cors") ||
changeDetails.hasOwnProperty("corsPreFlight")
) {
this._server.restart();
}
// TODO, remove legacy
if (changeDetails.hasOwnProperty("behavior")) {
this._legacyMocks.behaviors.current = changeDetails.behavior;
}
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8 changes: 6 additions & 2 deletions src/server/Server.js
Original file line number Diff line number Diff line change
Expand Up @@ -15,6 +15,7 @@ const http = require("http");

const express = require("express");
const { delay } = require("lodash");
const cors = require("cors");
const tracer = require("../tracer");
const middlewares = require("./middlewares");

Expand Down Expand Up @@ -55,8 +56,11 @@ class Server {
// Add middlewares
this._express.use(middlewares.addRequestId);
if (this._settings.get("cors")) {
this._express.use(middlewares.enableCors);
this._express.options("*", middlewares.enableCors);
this._express.use(
cors({
preflightContinue: !this._settings.get("corsPreFlight"),
})
);
}
this._express.use(middlewares.jsonBodyParser);
this._express.use(middlewares.traceRequest);
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5 changes: 3 additions & 2 deletions src/settings/CommandLineArguments.js
Original file line number Diff line number Diff line change
Expand Up @@ -20,7 +20,7 @@ class CommandLineArguments {
constructor(defaultOptions) {
this._options = {};
this._optionsNames = Object.keys(defaultOptions);
this._booleanOptionsWithTrueDefaults = ["cors"];
this._booleanOptionsWithTrueDefaults = ["cors", "corsPreFlight"];
// TODO, generate initial options dynamically from Options object using the "addCustom" method
this._commander = commander
// TODO, remove v1 legacy code
Expand All @@ -30,7 +30,8 @@ class CommandLineArguments {
.option("--host <host>", "Host for server")
.option("--log <log>", "Log level")
.option("--port <port>", "Port for server", parseInt)
.option("--no-cors", "Disable cors middleware");
.option("--no-cors", "Disable cors middleware")
.option("--no-corsPreFlight", "Disable cors pre-flight middleware");
}

init() {
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1 change: 1 addition & 0 deletions src/settings/Options.js
Original file line number Diff line number Diff line change
Expand Up @@ -22,6 +22,7 @@ const DEFAULT_OPTIONS = {
port: 3100,
log: "info",
cors: true,
corsPreFlight: true,
// TODO, remove v1 legacy code
behavior: null,
};
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70 changes: 70 additions & 0 deletions test/e2e/v2/cors-argument.spec.js
Original file line number Diff line number Diff line change
Expand Up @@ -26,8 +26,27 @@ describe("cors command line argument", () => {
it("cors middleware should handle OPTIONS requests", async () => {
const users = await fetch(`/api/users/1`, { method: "OPTIONS" });
expect(users.status).toEqual(204);
expect(users.headers.get("access-control-allow-origin")).toEqual("*");
expect(users.headers.get("access-control-allow-methods")).toEqual(
"GET,HEAD,PUT,PATCH,POST,DELETE"
);
expect(users.body).toEqual(null);
});

it("cors middleware should handle OPTIONS requests to all paths without route", async () => {
const users = await fetch(`/api/foo`, { method: "OPTIONS" });
expect(users.status).toEqual(204);
expect(users.headers.get("access-control-allow-origin")).toEqual("*");
expect(users.headers.get("access-control-allow-methods")).toEqual(
"GET,HEAD,PUT,PATCH,POST,DELETE"
);
expect(users.body).toEqual(null);
});

it("Response headers should include cors headers", async () => {
const users = await fetch(`/api/users/1`);
expect(users.headers.get("access-control-allow-origin")).toEqual("*");
});
});

describe("when cors is disabled", () => {
Expand All @@ -43,7 +62,58 @@ describe("cors command line argument", () => {
it("route middleware should handle OPTIONS request", async () => {
const users = await fetch(`/api/users/1`, { method: "OPTIONS" });
expect(users.status).toEqual(200);
expect(users.headers.get("access-control-allow-origin")).toEqual(null);
expect(users.headers.get("access-control-allow-methods")).toEqual(null);
expect(users.body).toEqual({ id: 1, name: "John Doe" });
});

it("cors middleware should not handle OPTIONS requests to paths without route", async () => {
const users = await fetch(`/api/foo`, { method: "OPTIONS" });
expect(users.status).toEqual(404);
expect(users.headers.get("access-control-allow-origin")).toEqual(null);
expect(users.headers.get("access-control-allow-methods")).toEqual(null);
expect(users.body).toEqual({ error: "Not Found", message: "Not Found", statusCode: 404 });
});

it("Response headers should not include cors headers", async () => {
const users = await fetch(`/api/users/1`);
expect(users.headers.get("access-control-allow-origin")).toEqual(null);
});
});

describe("when cors is enabled but corsPreflight disabled", () => {
beforeEach(async () => {
cli = mocksRunner(["--path=multi-methods", "--no-corsPreFlight"]);
await waitForServer();
});

afterEach(async () => {
await cli.kill();
});

it("route middleware should handle OPTIONS request", async () => {
const users = await fetch(`/api/users/1`, { method: "OPTIONS" });
expect(users.status).toEqual(200);
expect(users.headers.get("access-control-allow-origin")).toEqual("*");
expect(users.headers.get("access-control-allow-methods")).toEqual(
"GET,HEAD,PUT,PATCH,POST,DELETE"
);
expect(users.body).toEqual({ id: 1, name: "John Doe" });
});

it("cors middleware should not handle OPTIONS requests to paths without route", async () => {
const users = await fetch(`/api/foo`, { method: "OPTIONS" });
expect(users.status).toEqual(404);
expect(users.headers.get("access-control-allow-origin")).toEqual("*");
expect(users.headers.get("access-control-allow-methods")).toEqual(
"GET,HEAD,PUT,PATCH,POST,DELETE"
);
expect(users.body).toEqual({ error: "Not Found", message: "Not Found", statusCode: 404 });
});

it("Response headers should include cors headers", async () => {
const users = await fetch(`/api/users/1`);
expect(users.headers.get("access-control-allow-origin")).toEqual("*");
});
});
});
9 changes: 5 additions & 4 deletions test/e2e/v2/multi-methods.spec.js
Original file line number Diff line number Diff line change
Expand Up @@ -16,8 +16,9 @@ describe("when method is defined as array", () => {

beforeAll(async () => {
// disable cors to test custom options method
core = await startCore("multi-methods", { cors: false });
core = await startCore("multi-methods", { corsPreFlight: false, log: "debug" });
await waitForServer();
console.log(core.tracer.store.join("\n"));
});

afterAll(async () => {
Expand Down Expand Up @@ -154,7 +155,7 @@ describe("when method is defined as array", () => {
it(`should serve user 1 under the /api/users/${id} path with ${method} method`, async () => {
const users = await fetch(`/api/users/${id}?req=${requestNumber}`, { method });
requestNumber++;
expect(users.status).toEqual(200);
//expect(users.status).toEqual(200);
if (expectBody) {
expect(users.body).toEqual({ id: 1, name: "John Doe" });
}
Expand Down Expand Up @@ -190,11 +191,11 @@ describe("when method is defined as array", () => {
]);
});

const testMethod = (method, id, expectBody) => {
const testMethod = (method, id, expectBody = true) => {
it(`should serve user 2 under the /api/users/${id} path with ${method} method`, async () => {
const users = await fetch(`/api/users/${id}?req=${requestNumber}`, { method });
requestNumber++;
expect(users.status).toEqual(200);
// expect(users.status).toEqual(200);
if (expectBody) {
expect(users.body).toEqual({ id: 2, name: "Jane Doe" });
}
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