This commit is contained in:
Nathan Bierema 2025-06-17 19:25:17 -04:00
parent 4889607f18
commit e4d2ecb145

View File

@ -5,24 +5,23 @@
* Mock Service Worker. * Mock Service Worker.
* @see https://github.com/mswjs/msw * @see https://github.com/mswjs/msw
* - Please do NOT modify this file. * - Please do NOT modify this file.
* - Please do NOT serve this file on production.
*/ */
const PACKAGE_VERSION = '2.8.7' const PACKAGE_VERSION = '2.10.2'
const INTEGRITY_CHECKSUM = '00729d72e3b82faf54ca8b9621dbb96f' const INTEGRITY_CHECKSUM = 'f5825c521429caf22a4dd13b66e243af'
const IS_MOCKED_RESPONSE = Symbol('isMockedResponse') const IS_MOCKED_RESPONSE = Symbol('isMockedResponse')
const activeClientIds = new Set() const activeClientIds = new Set()
self.addEventListener('install', function () { addEventListener('install', function () {
self.skipWaiting() self.skipWaiting()
}) })
self.addEventListener('activate', function (event) { addEventListener('activate', function (event) {
event.waitUntil(self.clients.claim()) event.waitUntil(self.clients.claim())
}) })
self.addEventListener('message', async function (event) { addEventListener('message', async function (event) {
const clientId = event.source.id const clientId = Reflect.get(event.source || {}, 'id')
if (!clientId || !self.clients) { if (!clientId || !self.clients) {
return return
@ -94,17 +93,18 @@ self.addEventListener('message', async function (event) {
} }
}) })
self.addEventListener('fetch', function (event) { addEventListener('fetch', function (event) {
const { request } = event
// Bypass navigation requests. // Bypass navigation requests.
if (request.mode === 'navigate') { if (event.request.mode === 'navigate') {
return return
} }
// Opening the DevTools triggers the "only-if-cached" request // Opening the DevTools triggers the "only-if-cached" request
// that cannot be handled by the worker. Bypass such requests. // that cannot be handled by the worker. Bypass such requests.
if (request.cache === 'only-if-cached' && request.mode !== 'same-origin') { if (
event.request.cache === 'only-if-cached' &&
event.request.mode !== 'same-origin'
) {
return return
} }
@ -115,48 +115,62 @@ self.addEventListener('fetch', function (event) {
return return
} }
// Generate unique request ID.
const requestId = crypto.randomUUID() const requestId = crypto.randomUUID()
event.respondWith(handleRequest(event, requestId)) event.respondWith(handleRequest(event, requestId))
}) })
/**
* @param {FetchEvent} event
* @param {string} requestId
*/
async function handleRequest(event, requestId) { async function handleRequest(event, requestId) {
const client = await resolveMainClient(event) const client = await resolveMainClient(event)
const requestCloneForEvents = event.request.clone()
const response = await getResponse(event, client, requestId) const response = await getResponse(event, client, requestId)
// Send back the response clone for the "response:*" life-cycle events. // Send back the response clone for the "response:*" life-cycle events.
// Ensure MSW is active and ready to handle the message, otherwise // Ensure MSW is active and ready to handle the message, otherwise
// this message will pend indefinitely. // this message will pend indefinitely.
if (client && activeClientIds.has(client.id)) { if (client && activeClientIds.has(client.id)) {
;(async function () { const serializedRequest = await serializeRequest(requestCloneForEvents)
const responseClone = response.clone()
sendToClient( // Clone the response so both the client and the library could consume it.
client, const responseClone = response.clone()
{
type: 'RESPONSE', sendToClient(
payload: { client,
requestId, {
isMockedResponse: IS_MOCKED_RESPONSE in response, type: 'RESPONSE',
payload: {
isMockedResponse: IS_MOCKED_RESPONSE in response,
request: {
id: requestId,
...serializedRequest,
},
response: {
type: responseClone.type, type: responseClone.type,
status: responseClone.status, status: responseClone.status,
statusText: responseClone.statusText, statusText: responseClone.statusText,
body: responseClone.body,
headers: Object.fromEntries(responseClone.headers.entries()), headers: Object.fromEntries(responseClone.headers.entries()),
body: responseClone.body,
}, },
}, },
[responseClone.body], },
) responseClone.body ? [serializedRequest.body, responseClone.body] : [],
})() )
} }
return response return response
} }
// Resolve the main client for the given event. /**
// Client that issues a request doesn't necessarily equal the client * Resolve the main client for the given event.
// that registered the worker. It's with the latter the worker should * Client that issues a request doesn't necessarily equal the client
// communicate with during the response resolving phase. * that registered the worker. It's with the latter the worker should
* communicate with during the response resolving phase.
* @param {FetchEvent} event
* @returns {Promise<Client | undefined>}
*/
async function resolveMainClient(event) { async function resolveMainClient(event) {
const client = await self.clients.get(event.clientId) const client = await self.clients.get(event.clientId)
@ -184,12 +198,16 @@ async function resolveMainClient(event) {
}) })
} }
/**
* @param {FetchEvent} event
* @param {Client | undefined} client
* @param {string} requestId
* @returns {Promise<Response>}
*/
async function getResponse(event, client, requestId) { async function getResponse(event, client, requestId) {
const { request } = event
// Clone the request because it might've been already used // Clone the request because it might've been already used
// (i.e. its body has been read and sent to the client). // (i.e. its body has been read and sent to the client).
const requestClone = request.clone() const requestClone = event.request.clone()
function passthrough() { function passthrough() {
// Cast the request headers to a new Headers instance // Cast the request headers to a new Headers instance
@ -230,29 +248,17 @@ async function getResponse(event, client, requestId) {
} }
// Notify the client that a request has been intercepted. // Notify the client that a request has been intercepted.
const requestBuffer = await request.arrayBuffer() const serializedRequest = await serializeRequest(event.request)
const clientMessage = await sendToClient( const clientMessage = await sendToClient(
client, client,
{ {
type: 'REQUEST', type: 'REQUEST',
payload: { payload: {
id: requestId, id: requestId,
url: request.url, ...serializedRequest,
mode: request.mode,
method: request.method,
headers: Object.fromEntries(request.headers.entries()),
cache: request.cache,
credentials: request.credentials,
destination: request.destination,
integrity: request.integrity,
redirect: request.redirect,
referrer: request.referrer,
referrerPolicy: request.referrerPolicy,
body: requestBuffer,
keepalive: request.keepalive,
}, },
}, },
[requestBuffer], [serializedRequest.body],
) )
switch (clientMessage.type) { switch (clientMessage.type) {
@ -268,6 +274,12 @@ async function getResponse(event, client, requestId) {
return passthrough() return passthrough()
} }
/**
* @param {Client} client
* @param {any} message
* @param {Array<Transferable>} transferrables
* @returns {Promise<any>}
*/
function sendToClient(client, message, transferrables = []) { function sendToClient(client, message, transferrables = []) {
return new Promise((resolve, reject) => { return new Promise((resolve, reject) => {
const channel = new MessageChannel() const channel = new MessageChannel()
@ -280,14 +292,18 @@ function sendToClient(client, message, transferrables = []) {
resolve(event.data) resolve(event.data)
} }
client.postMessage( client.postMessage(message, [
message, channel.port2,
[channel.port2].concat(transferrables.filter(Boolean)), ...transferrables.filter(Boolean),
) ])
}) })
} }
async function respondWithMock(response) { /**
* @param {Response} response
* @returns {Response}
*/
function respondWithMock(response) {
// Setting response status code to 0 is a no-op. // Setting response status code to 0 is a no-op.
// However, when responding with a "Response.error()", the produced Response // However, when responding with a "Response.error()", the produced Response
// instance will have status code set to 0. Since it's not possible to create // instance will have status code set to 0. Since it's not possible to create
@ -305,3 +321,24 @@ async function respondWithMock(response) {
return mockedResponse return mockedResponse
} }
/**
* @param {Request} request
*/
async function serializeRequest(request) {
return {
url: request.url,
mode: request.mode,
method: request.method,
headers: Object.fromEntries(request.headers.entries()),
cache: request.cache,
credentials: request.credentials,
destination: request.destination,
integrity: request.integrity,
redirect: request.redirect,
referrer: request.referrer,
referrerPolicy: request.referrerPolicy,
body: await request.arrayBuffer(),
keepalive: request.keepalive,
}
}