134 lines
4.5 KiB
JavaScript
134 lines
4.5 KiB
JavaScript
import {
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HomeServerError,
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RequestAbortError,
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NetworkError
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} from "./error.js";
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class RequestWrapper {
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constructor(promise, controller) {
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if (!controller) {
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const abortPromise = new Promise((_, reject) => {
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this._controller = {
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abort() {
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const err = new Error("fetch request aborted");
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err.name = "AbortError";
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reject(err);
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}
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};
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});
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this._promise = Promise.race([promise, abortPromise]);
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} else {
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this._promise = promise;
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this._controller = controller;
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}
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}
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abort() {
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this._controller.abort();
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}
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response() {
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return this._promise;
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}
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}
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// todo: everywhere here, encode params in the url that could have slashes ... mainly event ids?
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export default class HomeServerApi {
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constructor(homeserver, accessToken) {
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// store these both in a closure somehow so it's harder to get at in case of XSS?
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// one could change the homeserver as well so the token gets sent there, so both must be protected from read/write
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this._homeserver = homeserver;
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this._accessToken = accessToken;
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}
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_url(csPath) {
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return `${this._homeserver}/_matrix/client/r0${csPath}`;
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}
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_request(method, csPath, queryParams = {}, body) {
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const queryString = Object.entries(queryParams)
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.filter(([, value]) => value !== undefined)
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.map(([name, value]) => `${encodeURIComponent(name)}=${encodeURIComponent(value)}`)
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.join("&");
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const url = this._url(`${csPath}?${queryString}`);
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let bodyString;
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const headers = new Headers();
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if (this._accessToken) {
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headers.append("Authorization", `Bearer ${this._accessToken}`);
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}
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headers.append("Accept", "application/json");
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if (body) {
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headers.append("Content-Type", "application/json");
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bodyString = JSON.stringify(body);
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}
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const controller = typeof AbortController === "function" ? new AbortController() : null;
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// TODO: set authenticated headers with second arguments, cache them
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let promise = fetch(url, {
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method,
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headers,
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body: bodyString,
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signal: controller && controller.signal
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});
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promise = promise.then(async (response) => {
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if (response.ok) {
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return await response.json();
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} else {
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switch (response.status) {
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default:
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throw new HomeServerError(method, url, await response.json())
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}
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}
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}, err => {
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if (err.name === "AbortError") {
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throw new RequestAbortError();
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} else if (err instanceof TypeError) {
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// Network errors are reported as TypeErrors, see
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// https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Fetch#Checking_that_the_fetch_was_successful
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// this can either mean user is offline, server is offline, or a CORS error (server misconfiguration).
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//
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// One could check navigator.onLine to rule out the first
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// but the 2 later ones are indistinguishable from javascript.
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throw new NetworkError(err.message);
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}
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throw err;
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});
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return new RequestWrapper(promise, controller);
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}
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_post(csPath, queryParams, body) {
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return this._request("POST", csPath, queryParams, body);
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}
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_put(csPath, queryParams, body) {
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return this._request("PUT", csPath, queryParams, body);
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}
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_get(csPath, queryParams, body) {
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return this._request("GET", csPath, queryParams, body);
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}
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sync(since, filter, timeout) {
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return this._get("/sync", {since, timeout, filter});
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}
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// params is from, dir and optionally to, limit, filter.
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messages(roomId, params) {
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return this._get(`/rooms/${roomId}/messages`, params);
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}
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send(roomId, eventType, txnId, content) {
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return this._put(`/rooms/${roomId}/send/${eventType}/${txnId}`, {}, content);
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}
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passwordLogin(username, password) {
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return this._post("/login", undefined, {
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"type": "m.login.password",
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"identifier": {
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"type": "m.id.user",
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"user": username
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},
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"password": password
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});
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}
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}
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