2021-03-09 23:09:35 +08:00
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"use strict";
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const bent = require("bent");
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const getJSON = bent("json");
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const { encode } = require("html-entities");
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const cleanBaseURL = require("clean-base-url");
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const path = require("path");
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const fs = require("fs");
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const IGNORE_PATHS = [
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/\/ember-cli-live-reload\.js$/,
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/\/session\/[^\/]+\/become$/,
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];
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function htmlTag(buffer, bootstrap) {
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let classList = "";
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if (bootstrap.html_classes) {
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classList = ` class="${bootstrap.html_classes}"`;
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}
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buffer.push(`<html lang="${bootstrap.html_lang}"${classList}>`);
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}
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2021-03-12 03:40:25 +08:00
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function bareStylesheets(buffer, bootstrap) {
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(bootstrap.stylesheets || []).forEach((s) => {
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if (s.theme_id) {
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return;
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}
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let attrs = [];
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if (s.media) {
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attrs.push(`media="${s.media}"`);
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}
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if (s.target) {
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attrs.push(`data-target="${s.target}"`);
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}
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let link = `<link rel="stylesheet" type="text/css" href="${
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s.href
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}" ${attrs.join(" ")}></script>\n`;
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buffer.push(link);
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});
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}
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2021-03-09 23:09:35 +08:00
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function head(buffer, bootstrap) {
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if (bootstrap.csrf_token) {
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buffer.push(`<meta name="csrf-param" buffer="authenticity_token">`);
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buffer.push(`<meta name="csrf-token" buffer="${bootstrap.csrf_token}">`);
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}
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if (bootstrap.theme_ids) {
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buffer.push(
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`<meta name="discourse_theme_ids" buffer="${bootstrap.theme_ids}">`
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);
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}
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let setupData = "";
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Object.keys(bootstrap.setup_data).forEach((sd) => {
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let val = bootstrap.setup_data[sd];
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if (val) {
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if (Array.isArray(val)) {
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val = JSON.stringify(val);
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} else {
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val = val.toString();
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}
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setupData += ` data-${sd.replace(/\_/g, "-")}="${encode(val)}"`;
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}
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});
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buffer.push(`<meta id="data-discourse-setup"${setupData} />`);
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(bootstrap.stylesheets || []).forEach((s) => {
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let attrs = [];
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if (s.media) {
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attrs.push(`media="${s.media}"`);
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}
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if (s.target) {
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attrs.push(`data-target="${s.target}"`);
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}
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if (s.theme_id) {
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attrs.push(`data-theme-id="${s.theme_id}"`);
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}
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let link = `<link rel="stylesheet" type="text/css" href="${
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s.href
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}" ${attrs.join(" ")}></script>\n`;
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buffer.push(link);
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});
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bootstrap.plugin_js.forEach((src) =>
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buffer.push(`<script src="${src}"></script>`)
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);
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buffer.push(bootstrap.theme_html.translations);
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buffer.push(bootstrap.theme_html.js);
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buffer.push(bootstrap.theme_html.head_tag);
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buffer.push(bootstrap.html.before_head_close);
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}
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2021-03-12 03:40:25 +08:00
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function localeScript(buffer, bootstrap) {
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buffer.push(`<script src="${bootstrap.locale_script}"></script>`);
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}
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2021-03-09 23:09:35 +08:00
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function beforeScriptLoad(buffer, bootstrap) {
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buffer.push(bootstrap.html.before_script_load);
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2021-03-12 03:40:25 +08:00
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localeScript(buffer, bootstrap);
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2021-03-09 23:09:35 +08:00
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(bootstrap.extra_locales || []).forEach((l) =>
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buffer.push(`<script src="${l}"></script>`)
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);
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}
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function body(buffer, bootstrap) {
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buffer.push(bootstrap.theme_html.header);
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buffer.push(bootstrap.html.header);
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}
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function bodyFooter(buffer, bootstrap) {
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buffer.push(bootstrap.theme_html.body_tag);
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buffer.push(bootstrap.html.before_body_close);
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}
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function hiddenLoginForm(buffer, bootstrap) {
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if (!bootstrap.preloaded.currentUser) {
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buffer.push(`
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<form id='hidden-login-form' method="post" action="${bootstrap.login_path}" style="display: none;">
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<input name="username" type="text" id="signin_username">
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<input name="password" type="password" id="signin_password">
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<input name="redirect" type="hidden">
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<input type="submit" id="signin-button">
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</form>
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`);
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}
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}
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function preloaded(buffer, bootstrap) {
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buffer.push(
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`<div class="hidden" id="data-preloaded" data-preloaded="${encode(
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JSON.stringify(bootstrap.preloaded)
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)}"></div>`
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);
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}
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const BUILDERS = {
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"html-tag": htmlTag,
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"before-script-load": beforeScriptLoad,
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head: head,
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body: body,
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"hidden-login-form": hiddenLoginForm,
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preloaded: preloaded,
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"body-footer": bodyFooter,
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2021-03-12 03:40:25 +08:00
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"locale-script": localeScript,
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"bare-stylesheets": bareStylesheets,
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2021-03-09 23:09:35 +08:00
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};
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function replaceIn(bootstrap, template, id) {
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let buffer = [];
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BUILDERS[id](buffer, bootstrap);
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let contents = buffer.filter((b) => b && b.length > 0).join("\n");
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return template.replace(`{{bootstrap-content-for "${id}"}}`, contents);
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}
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function applyBootstrap(bootstrap, template) {
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Object.keys(BUILDERS).forEach((id) => {
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template = replaceIn(bootstrap, template, id);
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});
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return template;
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}
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2021-03-12 03:40:25 +08:00
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function decorateIndex(assetPath, baseUrl, headers) {
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2021-03-09 23:09:35 +08:00
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// eslint-disable-next-line
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return new Promise((resolve, reject) => {
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fs.readFile(
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2021-03-12 03:40:25 +08:00
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path.join(process.cwd(), "dist", assetPath),
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2021-03-09 23:09:35 +08:00
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"utf8",
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(err, template) => {
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getJSON(`${baseUrl}/bootstrap.json`, null, headers)
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.then((json) => {
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resolve(applyBootstrap(json.bootstrap, template));
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})
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.catch(() => {
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reject(`Could not get ${baseUrl}/bootstrap.json`);
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});
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}
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);
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});
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}
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module.exports = {
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name: require("./package").name,
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isDevelopingAddon() {
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return true;
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},
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serverMiddleware(config) {
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let proxy = config.options.proxy;
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let app = config.app;
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let options = config.options;
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let watcher = options.watcher;
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let baseURL =
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options.rootURL === ""
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? "/"
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: cleanBaseURL(options.rootURL || options.baseURL);
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app.use(async (req, res, next) => {
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try {
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const results = await watcher;
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if (this.shouldHandleRequest(req, options)) {
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let assetPath = req.path.slice(baseURL.length);
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let isFile = false;
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try {
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isFile = fs
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.statSync(path.join(results.directory, assetPath))
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.isFile();
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} catch (err) {
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/* ignore */
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}
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if (!isFile) {
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2021-03-12 03:40:25 +08:00
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assetPath = "index.html";
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}
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if (assetPath.endsWith("index.html")) {
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2021-03-09 23:09:35 +08:00
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let template;
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try {
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2021-03-12 03:40:25 +08:00
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template = await decorateIndex(assetPath, proxy, req.headers);
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2021-03-09 23:09:35 +08:00
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} catch (e) {
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template = `
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<html>
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<h1>Discourse Build Error</h1>
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<p>${e.toString()}</p>
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</html>
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`;
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}
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2021-03-12 03:40:25 +08:00
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return res.send(template);
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2021-03-09 23:09:35 +08:00
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}
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}
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} finally {
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next();
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}
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});
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},
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shouldHandleRequest(req, options) {
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let acceptHeaders = req.headers.accept || [];
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let hasHTMLHeader = acceptHeaders.indexOf("text/html") !== -1;
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if (req.method !== "GET") {
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return false;
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}
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if (!hasHTMLHeader) {
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return false;
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}
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if (IGNORE_PATHS.some((ip) => ip.test(req.path))) {
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return false;
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}
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let baseURL =
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options.rootURL === ""
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? "/"
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: cleanBaseURL(options.rootURL || options.baseURL);
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let baseURLRegexp = new RegExp(`^${baseURL}`);
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return baseURLRegexp.test(req.path);
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},
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};
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