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import {
RequestController,
emitAsync,
handleRequest
} from "./chunk-H5O73WD2.mjs";
import {
FetchResponse,
IS_PATCHED_MODULE
} from "./chunk-5UK33FSU.mjs";
import {
hasConfigurableGlobal
} from "./chunk-TX5GBTFY.mjs";
import {
Interceptor,
createRequestId
} from "./chunk-QED3Q6Z2.mjs";
// src/interceptors/fetch/index.ts
import { invariant } from "outvariant";
import { DeferredPromise } from "@open-draft/deferred-promise";
// src/utils/canParseUrl.ts
function canParseUrl(url) {
try {
new URL(url);
return true;
} catch (_error) {
return false;
}
}
// src/interceptors/fetch/utils/createNetworkError.ts
function createNetworkError(cause) {
return Object.assign(new TypeError("Failed to fetch"), {
cause
});
}
// src/interceptors/fetch/utils/followRedirect.ts
var REQUEST_BODY_HEADERS = [
"content-encoding",
"content-language",
"content-location",
"content-type",
"content-length"
];
var kRedirectCount = Symbol("kRedirectCount");
async function followFetchRedirect(request, response) {
if (response.status !== 303 && request.body != null) {
return Promise.reject(createNetworkError());
}
const requestUrl = new URL(request.url);
let locationUrl;
try {
locationUrl = new URL(response.headers.get("location"), request.url);
} catch (error) {
return Promise.reject(createNetworkError(error));
}
if (!(locationUrl.protocol === "http:" || locationUrl.protocol === "https:")) {
return Promise.reject(
createNetworkError("URL scheme must be a HTTP(S) scheme")
);
}
if (Reflect.get(request, kRedirectCount) > 20) {
return Promise.reject(createNetworkError("redirect count exceeded"));
}
Object.defineProperty(request, kRedirectCount, {
value: (Reflect.get(request, kRedirectCount) || 0) + 1
});
if (request.mode === "cors" && (locationUrl.username || locationUrl.password) && !sameOrigin(requestUrl, locationUrl)) {
return Promise.reject(
createNetworkError('cross origin not allowed for request mode "cors"')
);
}
const requestInit = {};
if ([301, 302].includes(response.status) && request.method === "POST" || response.status === 303 && !["HEAD", "GET"].includes(request.method)) {
requestInit.method = "GET";
requestInit.body = null;
REQUEST_BODY_HEADERS.forEach((headerName) => {
request.headers.delete(headerName);
});
}
if (!sameOrigin(requestUrl, locationUrl)) {
request.headers.delete("authorization");
request.headers.delete("proxy-authorization");
request.headers.delete("cookie");
request.headers.delete("host");
}
requestInit.headers = request.headers;
return fetch(new Request(locationUrl, requestInit));
}
function sameOrigin(left, right) {
if (left.origin === right.origin && left.origin === "null") {
return true;
}
if (left.protocol === right.protocol && left.hostname === right.hostname && left.port === right.port) {
return true;
}
return false;
}
// src/interceptors/fetch/utils/brotli-decompress.browser.ts
var BrotliDecompressionStream = class extends TransformStream {
constructor() {
console.warn(
"[Interceptors]: Brotli decompression of response streams is not supported in the browser"
);
super({
transform(chunk, controller) {
controller.enqueue(chunk);
}
});
}
};
// src/interceptors/fetch/utils/decompression.ts
var PipelineStream = class extends TransformStream {
constructor(transformStreams, ...strategies) {
super({}, ...strategies);
const readable = [super.readable, ...transformStreams].reduce(
(readable2, transform) => readable2.pipeThrough(transform)
);
Object.defineProperty(this, "readable", {
get() {
return readable;
}
});
}
};
function parseContentEncoding(contentEncoding) {
return contentEncoding.toLowerCase().split(",").map((coding) => coding.trim());
}
function createDecompressionStream(contentEncoding) {
if (contentEncoding === "") {
return null;
}
const codings = parseContentEncoding(contentEncoding);
if (codings.length === 0) {
return null;
}
const transformers = codings.reduceRight(
(transformers2, coding) => {
if (coding === "gzip" || coding === "x-gzip") {
return transformers2.concat(new DecompressionStream("gzip"));
} else if (coding === "deflate") {
return transformers2.concat(new DecompressionStream("deflate"));
} else if (coding === "br") {
return transformers2.concat(new BrotliDecompressionStream());
} else {
transformers2.length = 0;
}
return transformers2;
},
[]
);
return new PipelineStream(transformers);
}
function decompressResponse(response) {
if (response.body === null) {
return null;
}
const decompressionStream = createDecompressionStream(
response.headers.get("content-encoding") || ""
);
if (!decompressionStream) {
return null;
}
response.body.pipeTo(decompressionStream.writable);
return decompressionStream.readable;
}
// src/interceptors/fetch/index.ts
var _FetchInterceptor = class extends Interceptor {
constructor() {
super(_FetchInterceptor.symbol);
}
checkEnvironment() {
return hasConfigurableGlobal("fetch");
}
async setup() {
const pureFetch = globalThis.fetch;
invariant(
!pureFetch[IS_PATCHED_MODULE],
'Failed to patch the "fetch" module: already patched.'
);
globalThis.fetch = async (input, init) => {
const requestId = createRequestId();
const resolvedInput = typeof input === "string" && typeof location !== "undefined" && !canParseUrl(input) ? new URL(input, location.origin) : input;
const request = new Request(resolvedInput, init);
const responsePromise = new DeferredPromise();
const controller = new RequestController(request);
this.logger.info("[%s] %s", request.method, request.url);
this.logger.info("awaiting for the mocked response...");
this.logger.info(
'emitting the "request" event for %s listener(s)...',
this.emitter.listenerCount("request")
);
const isRequestHandled = await handleRequest({
request,
requestId,
emitter: this.emitter,
controller,
onResponse: async (rawResponse) => {
this.logger.info("received mocked response!", {
rawResponse
});
const decompressedStream = decompressResponse(rawResponse);
const response = decompressedStream === null ? rawResponse : new FetchResponse(decompressedStream, rawResponse);
FetchResponse.setUrl(request.url, response);
if (FetchResponse.isRedirectResponse(response.status)) {
if (request.redirect === "error") {
responsePromise.reject(createNetworkError("unexpected redirect"));
return;
}
if (request.redirect === "follow") {
followFetchRedirect(request, response).then(
(response2) => {
responsePromise.resolve(response2);
},
(reason) => {
responsePromise.reject(reason);
}
);
return;
}
}
if (this.emitter.listenerCount("response") > 0) {
this.logger.info('emitting the "response" event...');
await emitAsync(this.emitter, "response", {
// Clone the mocked response for the "response" event listener.
// This way, the listener can read the response and not lock its body
// for the actual fetch consumer.
response: response.clone(),
isMockedResponse: true,
request,
requestId
});
}
responsePromise.resolve(response);
},
onRequestError: (response) => {
this.logger.info("request has errored!", { response });
responsePromise.reject(createNetworkError(response));
},
onError: (error) => {
this.logger.info("request has been aborted!", { error });
responsePromise.reject(error);
}
});
if (isRequestHandled) {
this.logger.info("request has been handled, returning mock promise...");
return responsePromise;
}
this.logger.info(
"no mocked response received, performing request as-is..."
);
return pureFetch(request).then(async (response) => {
this.logger.info("original fetch performed", response);
if (this.emitter.listenerCount("response") > 0) {
this.logger.info('emitting the "response" event...');
const responseClone = response.clone();
await emitAsync(this.emitter, "response", {
response: responseClone,
isMockedResponse: false,
request,
requestId
});
}
return response;
});
};
Object.defineProperty(globalThis.fetch, IS_PATCHED_MODULE, {
enumerable: true,
configurable: true,
value: true
});
this.subscriptions.push(() => {
Object.defineProperty(globalThis.fetch, IS_PATCHED_MODULE, {
value: void 0
});
globalThis.fetch = pureFetch;
this.logger.info(
'restored native "globalThis.fetch"!',
globalThis.fetch.name
);
});
}
};
var FetchInterceptor = _FetchInterceptor;
FetchInterceptor.symbol = Symbol("fetch");
export {
FetchInterceptor
};
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