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Move timeout to fetch, as XHR has native timeout support

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This commit is contained in:
Bruno Windels 2020-08-05 15:36:44 +00:00
parent bfcb23ee74
commit b26bc69042
4 changed files with 83 additions and 84 deletions
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8
src/main.js
View File

@ -1,5 +1,5 @@
// import {RecordRequester, ReplayRequester} from "./matrix/net/request/replay.js";
import {fetchRequest} from "./matrix/net/request/fetch.js";
import {createFetchRequest} from "./matrix/net/request/fetch.js";
import {SessionContainer} from "./matrix/SessionContainer.js";
import {StorageFactory} from "./matrix/storage/idb/StorageFactory.js";
import {SessionInfoStorage} from "./matrix/sessioninfo/localstorage/SessionInfoStorage.js";
@ -16,13 +16,13 @@ export default async function main(container) {
// const request = replay.request;
// to record:
// const recorder = new RecordRequester(fetchRequest);
// const recorder = new RecordRequester(createFetchRequest(clock.createTimeout));
// const request = recorder.request;
// window.getBrawlFetchLog = () => recorder.log();
// normal network:
const request = fetchRequest;
const sessionInfoStorage = new SessionInfoStorage("brawl_sessions_v1");
const clock = new Clock();
const request = createFetchRequest(clock.createTimeout);
const sessionInfoStorage = new SessionInfoStorage("brawl_sessions_v1");
const storageFactory = new StorageFactory();
const vm = new BrawlViewModel({

46
src/matrix/net/HomeServerApi.js
View File

@ -5,9 +5,9 @@ import {
} from "../error.js";
class RequestWrapper {
constructor(method, url, requestResult, responsePromise) {
constructor(method, url, requestResult) {
this._requestResult = requestResult;
this._promise = responsePromise.then(response => {
this._promise = requestResult.response().then(response => {
// ok?
if (response.status >= 200 && response.status < 300) {
return response.body;
@ -44,35 +44,6 @@ export class HomeServerApi {
return `${this._homeserver}/_matrix/client/r0${csPath}`;
}
_abortOnTimeout(timeoutAmount, requestResult, responsePromise) {
const timeout = this._createTimeout(timeoutAmount);
// abort request if timeout finishes first
let timedOut = false;
timeout.elapsed().then(
() => {
timedOut = true;
requestResult.abort();
},
() => {} // ignore AbortError
);
// abort timeout if request finishes first
return responsePromise.then(
response => {
timeout.abort();
return response;
},
err => {
timeout.abort();
// map error to TimeoutError
if (err instanceof AbortError && timedOut) {
throw new ConnectionError(`Request timed out after ${timeoutAmount}ms`, true);
} else {
throw err;
}
}
);
}
_encodeQueryParams(queryParams) {
return Object.entries(queryParams || {})
.filter(([, value]) => value !== undefined)
@ -102,19 +73,10 @@ export class HomeServerApi {
method,
headers,
body: bodyString,
timeout: options && options.timeout
});
let responsePromise = requestResult.response();
if (options && options.timeout) {
responsePromise = this._abortOnTimeout(
options.timeout,
requestResult,
responsePromise
);
}
const wrapper = new RequestWrapper(method, url, requestResult, responsePromise);
const wrapper = new RequestWrapper(method, url, requestResult);
if (this._reconnector) {
wrapper.response().catch(err => {

85
src/matrix/net/request/fetch.js
View File

@ -2,6 +2,7 @@ import {
AbortError,
ConnectionError
} from "../../error.js";
import {abortOnTimeout} from "../timeout.js";
class RequestResult {
constructor(promise, controller) {
@ -15,9 +16,9 @@ class RequestResult {
}
};
});
this._promise = Promise.race([promise, abortPromise]);
this.promise = Promise.race([promise, abortPromise]);
} else {
this._promise = promise;
this.promise = promise;
this._controller = controller;
}
}
@ -27,47 +28,55 @@ class RequestResult {
}
response() {
return this._promise;
return this.promise;
}
}
export function fetchRequest(url, options) {
const controller = typeof AbortController === "function" ? new AbortController() : null;
if (controller) {
export function createFetchRequest(createTimeout) {
return function fetchRequest(url, options) {
const controller = typeof AbortController === "function" ? new AbortController() : null;
if (controller) {
options = Object.assign(options, {
signal: controller.signal
});
}
options = Object.assign(options, {
signal: controller.signal
mode: "cors",
credentials: "omit",
referrer: "no-referrer",
cache: "no-cache",
});
}
options = Object.assign(options, {
mode: "cors",
credentials: "omit",
referrer: "no-referrer",
cache: "no-cache",
});
if (options.headers) {
const headers = new Headers();
for(const [name, value] of options.headers.entries()) {
headers.append(name, value);
if (options.headers) {
const headers = new Headers();
for(const [name, value] of options.headers.entries()) {
headers.append(name, value);
}
options.headers = headers;
}
options.headers = headers;
}
const promise = fetch(url, options).then(async response => {
const {status} = response;
const body = await response.json();
return {status, body};
}, err => {
if (err.name === "AbortError") {
throw new AbortError();
} else if (err instanceof TypeError) {
// Network errors are reported as TypeErrors, see
// https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Fetch#Checking_that_the_fetch_was_successful
// this can either mean user is offline, server is offline, or a CORS error (server misconfiguration).
//
// One could check navigator.onLine to rule out the first
// but the 2 latter ones are indistinguishable from javascript.
throw new ConnectionError(`${options.method} ${url}: ${err.message}`);
const promise = fetch(url, options).then(async response => {
const {status} = response;
const body = await response.json();
return {status, body};
}, err => {
if (err.name === "AbortError") {
throw new AbortError();
} else if (err instanceof TypeError) {
// Network errors are reported as TypeErrors, see
// https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Fetch#Checking_that_the_fetch_was_successful
// this can either mean user is offline, server is offline, or a CORS error (server misconfiguration).
//
// One could check navigator.onLine to rule out the first
// but the 2 latter ones are indistinguishable from javascript.
throw new ConnectionError(`${options.method} ${url}: ${err.message}`);
}
throw err;
});
const result = new RequestResult(promise, controller);
if (options.timeout) {
result.promise = abortOnTimeout(createTimeout, options.timeout, result, result.promise);
}
throw err;
});
return new RequestResult(promise, controller);
return result;
}
}

28
src/matrix/net/timeout.js Normal file
View File

@ -0,0 +1,28 @@
export function abortOnTimeout(createTimeout, timeoutAmount, requestResult, responsePromise) {
const timeout = createTimeout(timeoutAmount);
// abort request if timeout finishes first
let timedOut = false;
timeout.elapsed().then(
() => {
timedOut = true;
requestResult.abort();
},
() => {} // ignore AbortError when timeout is aborted
);
// abort timeout if request finishes first
return responsePromise.then(
response => {
timeout.abort();
return response;
},
err => {
timeout.abort();
// map error to TimeoutError
if (err instanceof AbortError && timedOut) {
throw new ConnectionError(`Request timed out after ${timeoutAmount}ms`, true);
} else {
throw err;
}
}
);
}