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3 changed files with 150 additions and 77 deletions
11
index.html
11
index.html
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@ -3,9 +3,18 @@
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<head>
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<head>
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<meta charset="utf-8" />
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<meta charset="utf-8" />
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<meta name="viewport" content="width=device-width" />
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<meta name="viewport" content="width=device-width" />
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<title>Battermost</title>
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<title>Bettermost</title>
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</head>
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</head>
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<body>
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<body>
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<form>
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<table>
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<tr><th>Server</th><td><input type="text" id="server" value="http://localhost:8080"/></td></tr>
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<tr><th>Username</th><td><input type="text" id="username"/></td></tr>
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<tr><th>Password</th><td><input type="password" id="password"/></td></tr>
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</table>
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<input type="submit" onclick="this.disabled = true; this.value = 'Logging in...'; logIn(); return false" value="Log in"/>
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</form>
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<script type="text/javascript" src="xhr.js"></script>
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<script type="text/javascript" src="main.js"></script>
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<script type="text/javascript" src="main.js"></script>
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</body>
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</body>
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</html>
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</html>
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125
main.js
125
main.js
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@ -1,84 +1,57 @@
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//async function postJson(url, data = {}, options = {}) {
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"use strict";
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//const response = await fetch(url, {
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//method: "POST",
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//mode: "no-cors",
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//credentials: "include",
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//headers: { "Content-Type": "application/json" },
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//redirect: "follow",
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//referrerPolicy: "no-referrer",
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//body: JSON.stringify(data),
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//...options
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//});
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////return await response.json();
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//return response;
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//}
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//var endpoint = "https://mattermost.zeus.gent/api/v4"; // Must not end with slash
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function byId(id, nullOk=false) {
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var endpoint = "http://localhost:8080"; // Must not end with slash
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const el = document.getElementById(id);
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var username = "fill me in";
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if (!el && !nullOk) {
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var password = "fill me in";
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console.error(`No element #${id}`);
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}
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return el;
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}
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class MattermostApi {
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constructor(endpoint) {
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this.endpoint = endpoint;
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}
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function scopeToArg(f) {
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async validateToken(token) {
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return function(...rest) {
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const response = await ajax.getJson(`${this.endpoint}/users/me`, {
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return f(this, ...rest);
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headers: {
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"Token": `Authorization: Bearer ${token}`
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}
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});
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return response.ok;
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}
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logIn(username, password) {
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return ajax.postJson(`${this.endpoint}/users/login`, {
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"login_id": username,
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"password": password
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})
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.then(response => {
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let token = response.getHeader("Token");
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window.localStorage.setItem("token", token);
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return response;
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})
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.then(response => {
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document.body.innerHTML = "";
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const pre = document.createElement("pre");
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pre.innerText = JSON.stringify(response.json, null, 2);
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document.body.appendChild(pre);
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return response;
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})
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.catch(error => {
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console.error(error);
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document.body.innerText = `An error occurred: ${error}`;
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});
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}
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}
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}
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}
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function postJson(url, data={}, options={}) {
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function logIn() {
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const prom = new Promise((resolve, reject) => {
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let endpoint = byId("server").value;
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let oReq = new XMLHttpRequest();
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if (!endpoint.endsWith("/")) endpoint += "/";
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oReq.addEventListener("load", scopeToArg(resolve));
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endpoint += "api/v4";
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oReq.addEventListener("abort", scopeToArg(reject));
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oReq.addEventListener("error", scopeToArg(reject));
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oReq.addEventListener("timeout", scopeToArg(reject));
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oReq.open("POST", url);
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oReq.send(JSON.stringify(data));
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});
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let api = new MattermostApi(endpoint);
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return prom;
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api.logIn(byId("username").value, byId("password").value);
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}
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}
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var token = null;
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function printIt(response) {
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console.log(response);
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if (response.status == 0) {
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document.body.innerText = "Network error";
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return;
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}
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if (200 <= response.status && response.status < 300) {
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try {
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const json = JSON.parse(response.response);
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document.body.innerHTML = "";
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const pre = document.createElement("pre");
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pre.innerText = "Received " + JSON.stringify(json, null, 2);
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document.body.appendChild(pre);
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token = response.getResponseHeader("token");
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window.localStorage.setItem("token", token);
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return token;
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} catch(e) {
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document.body.innerText = "The server did not reply with a valid JSON object. Make sure the server URL points to a Mattermost instance that is working correctly.";
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}
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} else {
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console.log(response.getAllResponseHeaders());
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try {
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const json = JSON.parse(response.response);
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document.body.innerText = "Failed to log in: " + json.message;
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} catch(e) {
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document.body.innerText = "Error: " + response.statusText;
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}
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}
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}
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postJson(`${endpoint}/api/v4/users/login`, {
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"login_id": username,
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"password": password
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})
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.then(printIt, printIt)
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.then(token => console.log(token));
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91
xhr.js
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91
xhr.js
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@ -0,0 +1,91 @@
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const ajax = (function() { "use strict";
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class NetworkError extends Error {}
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class UnexpectedMimeError extends Error {}
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class InvalidJsonError extends Error {}
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const MIME_JSON = "application/json";
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/**
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* Wrap a function so that it receives `this` as first argument.
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*/
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function thisToArg(f) {
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return function(...rest) {
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return f(this, ...rest);
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}
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}
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function xhrInitForPromise(resolve, reject, url, method, headers) {
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const t_resolve = thisToArg(resolve),
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t_reject = thisToArg(reject);
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let xhr = new XMLHttpRequest();
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xhr.addEventListener("load", t_resolve);
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xhr.addEventListener("error", t_resolve);
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xhr.addEventListener("abort", t_reject);
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xhr.addEventListener("timeout", t_reject);
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xhr.open(method, url);
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for (let header of Object.getOwnPropertyNames(headers)) {
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xhr.setRequestHeader(header, headers[header]);
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}
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return xhr;
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}
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function xhrParseJsonResponse(xhr) {
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if (xhr.status == 0) {
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console.error(xhr);
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throw new NetworkError("Failed to connect to server");
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}
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if (!xhr.responseText) {
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const json = null;
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} else {
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const contentType = xhr.getResponseHeader("Content-Type");
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if (contentType != MIME_JSON) {
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throw new UnexpectedMimeError(`Server did not reply with JSON but with ${contentType}`);
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}
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try {
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const json = JSON.parse(xhr.responseText);
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} catch(e) {
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throw new InvalidJsonError();
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}
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}
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return {
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ok: 200 <= xhr.status && xhr.status < 300,
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status: xhr.status,
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statusText: xhr.statusText,
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getHeader: xhr.getResponseHeader,
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json,
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xhr,
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};
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}
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function getJson(url, options={}) {
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if (!options.headers) options.headers = {};
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options.headers["Accept"] = MIME_JSON;
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return new Promise((resolve, reject) => {
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let xhr = xhrInitForPromise(resolve, reject, url, "GET", options.headers);
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xhr.send();
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}).then(xhrParseJsonResponse);
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}
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function postJson(url, data={}, options={}) {
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if (!options.headers) options.headers = {};
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options.headers["Content-Type"] = MIME_JSON;
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options.headers["Accept"] = MIME_JSON;
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return new Promise((resolve, reject) => {
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let xhr = xhrInitForPromise(resolve, reject, url, "POST", options.headers);
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xhr.send(JSON.stringify(data));
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}).then(xhrParseJsonResponse);
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}
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return {
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NetworkError, UnexpectedMimeError, InvalidJsonError,
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getJson, postJson
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};
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})();
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