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// src/RequestController.ts
import { invariant } from "outvariant";
import { DeferredPromise } from "@open-draft/deferred-promise";
// src/InterceptorError.ts
var InterceptorError = class extends Error {
constructor(message) {
super(message);
this.name = "InterceptorError";
Object.setPrototypeOf(this, InterceptorError.prototype);
}
};
// src/RequestController.ts
var kRequestHandled = Symbol("kRequestHandled");
var kResponsePromise = Symbol("kResponsePromise");
var RequestController = class {
constructor(request) {
this.request = request;
this[kRequestHandled] = false;
this[kResponsePromise] = new DeferredPromise();
}
/**
* Respond to this request with the given `Response` instance.
* @example
* controller.respondWith(new Response())
* controller.respondWith(Response.json({ id }))
* controller.respondWith(Response.error())
*/
respondWith(response) {
invariant.as(
InterceptorError,
!this[kRequestHandled],
'Failed to respond to the "%s %s" request: the "request" event has already been handled.',
this.request.method,
this.request.url
);
this[kRequestHandled] = true;
this[kResponsePromise].resolve(response);
}
/**
* Error this request with the given error.
* @example
* controller.errorWith()
* controller.errorWith(new Error('Oops!'))
*/
errorWith(error) {
invariant.as(
InterceptorError,
!this[kRequestHandled],
'Failed to error the "%s %s" request: the "request" event has already been handled.',
this.request.method,
this.request.url
);
this[kRequestHandled] = true;
this[kResponsePromise].resolve(error);
}
};
kResponsePromise, kRequestHandled;
// src/utils/emitAsync.ts
async function emitAsync(emitter, eventName, ...data) {
const listners = emitter.listeners(eventName);
if (listners.length === 0) {
return;
}
for (const listener of listners) {
await listener.apply(emitter, data);
}
}
// src/utils/handleRequest.ts
import { DeferredPromise as DeferredPromise2 } from "@open-draft/deferred-promise";
import { until } from "@open-draft/until";
// src/utils/isPropertyAccessible.ts
function isPropertyAccessible(obj, key) {
try {
obj[key];
return true;
} catch (e) {
return false;
}
}
// src/utils/responseUtils.ts
function createServerErrorResponse(body) {
return new Response(
JSON.stringify(
body instanceof Error ? {
name: body.name,
message: body.message,
stack: body.stack
} : body
),
{
status: 500,
statusText: "Unhandled Exception",
headers: {
"Content-Type": "application/json"
}
}
);
}
function isResponseError(response) {
return isPropertyAccessible(response, "type") && response.type === "error";
}
// src/utils/isNodeLikeError.ts
function isNodeLikeError(error) {
if (error == null) {
return false;
}
if (!(error instanceof Error)) {
return false;
}
return "code" in error && "errno" in error;
}
// src/utils/handleRequest.ts
async function handleRequest(options) {
const handleResponse = async (response) => {
if (response instanceof Error) {
options.onError(response);
} else if (isResponseError(response)) {
options.onRequestError(response);
} else {
await options.onResponse(response);
}
return true;
};
const handleResponseError = async (error) => {
if (error instanceof InterceptorError) {
throw result.error;
}
if (isNodeLikeError(error)) {
options.onError(error);
return true;
}
if (error instanceof Response) {
return await handleResponse(error);
}
return false;
};
options.emitter.once("request", ({ requestId: pendingRequestId }) => {
if (pendingRequestId !== options.requestId) {
return;
}
if (options.controller[kResponsePromise].state === "pending") {
options.controller[kResponsePromise].resolve(void 0);
}
});
const requestAbortPromise = new DeferredPromise2();
if (options.request.signal) {
if (options.request.signal.aborted) {
requestAbortPromise.reject(options.request.signal.reason);
} else {
options.request.signal.addEventListener(
"abort",
() => {
requestAbortPromise.reject(options.request.signal.reason);
},
{ once: true }
);
}
}
const result = await until(async () => {
const requestListtenersPromise = emitAsync(options.emitter, "request", {
requestId: options.requestId,
request: options.request,
controller: options.controller
});
await Promise.race([
// Short-circuit the request handling promise if the request gets aborted.
requestAbortPromise,
requestListtenersPromise,
options.controller[kResponsePromise]
]);
const mockedResponse = await options.controller[kResponsePromise];
return mockedResponse;
});
if (requestAbortPromise.state === "rejected") {
options.onError(requestAbortPromise.rejectionReason);
return true;
}
if (result.error) {
if (await handleResponseError(result.error)) {
return true;
}
if (options.emitter.listenerCount("unhandledException") > 0) {
const unhandledExceptionController = new RequestController(
options.request
);
await emitAsync(options.emitter, "unhandledException", {
error: result.error,
request: options.request,
requestId: options.requestId,
controller: unhandledExceptionController
}).then(() => {
if (unhandledExceptionController[kResponsePromise].state === "pending") {
unhandledExceptionController[kResponsePromise].resolve(void 0);
}
});
const nextResult = await until(
() => unhandledExceptionController[kResponsePromise]
);
if (nextResult.error) {
return handleResponseError(nextResult.error);
}
if (nextResult.data) {
return handleResponse(nextResult.data);
}
}
options.onResponse(createServerErrorResponse(result.error));
return true;
}
if (result.data) {
return handleResponse(result.data);
}
return false;
}
export {
RequestController,
emitAsync,
handleRequest
};
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