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feat: Dynamically import SSR handler

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This commit is contained in:
Alicia Sykes 2024-06-18 22:06:59 +01:00
parent 8c17303179
commit a6bc8d790e
1 changed files with 27 additions and 20 deletions
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47
server.js
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@ -7,8 +7,6 @@ import express from 'express';
import rateLimit from 'express-rate-limit';
import historyApiFallback from 'connect-history-api-fallback';
import { handler as ssrHandler } from './dist/server/entry.mjs';
// Load environment variables from .env file
dotenv.config();
@ -80,17 +78,33 @@ fs.readdirSync(dirPath, { withFileTypes: true })
});
});
const renderPlaceholderPage = async (res, msgId, logs) => {
const errorMessages = {
notCompiled: 'Looks like the GUI app has not yet been compiled.<br />'
+ 'Run <code>yarn build</code> to continue, then restart the server.',
notCompiledSsrHandler: 'Server-side rendering failed to initiate, as SSR handler not found.<br />'
+ 'This can be fixed by running <code>yarn build</code>, then restarting the server.<br />',
disabledGui: 'Web-Check API is up and running!<br />Access the endpoints at '
+ `<a href="${API_DIR}"><code>${API_DIR}</code></a>`,
};
const logOutput = logs ? `<div class="logs"><code>${logs}</code></div>` : '';
const errorMessage = (errorMessages[msgId] || 'An mystery error occurred.') + logOutput;
const placeholderContent = await fs.promises.readFile(placeholderFilePath, 'utf-8');
const htmlContent = placeholderContent.replace('<!-- CONTENT -->', errorMessage );
res.status(500).send(htmlContent);
};
// Create a single API endpoint to execute all lambda functions
app.get(API_DIR, async (req, res) => {
const results = {};
const { url } = req.query;
const maxExecutionTime = process.env.API_TIMEOUT_LIMIT || 20000;
const executeHandler = async (handler, req, res) => {
const executeHandler = async (handler, req) => {
return new Promise(async (resolve, reject) => {
try {
const mockRes = {
status: (statusCode) => mockRes,
status: () => mockRes,
json: (body) => resolve({ body }),
};
await handler({ ...req, query: { url } }, mockRes);
@ -139,28 +153,21 @@ app.use((req, res, next) => {
// Serve up the GUI - if build dir exists, and GUI feature enabled
if (process.env.DISABLE_GUI && process.env.DISABLE_GUI !== 'false') {
app.get('/', async (req, res) => {
const placeholderContent = await fs.promises.readFile(placeholderFilePath, 'utf-8');
const htmlContent = placeholderContent.replace(
'<!-- CONTENT -->',
'Web-Check API is up and running!<br />Access the endpoints at '
+`<a href="${API_DIR}"><code>${API_DIR}</code></a>`
);
res.status(500).send(htmlContent);
renderPlaceholderPage(res, 'disabledGui');
});
} else if (!fs.existsSync(guiPath)) {
app.get('/', async (req, res) => {
const placeholderContent = await fs.promises.readFile(placeholderFilePath, 'utf-8');
const htmlContent = placeholderContent.replace(
'<!-- CONTENT -->',
'Looks like the GUI app has not yet been compiled.<br /> ' +
'Run <code>yarn build</code> to continue, then restart the server.'
);
res.status(500).send(htmlContent);
renderPlaceholderPage(res, 'notCompiled');
});
} else { // GUI enabled, and build files present, let's go!!
app.use(express.static('dist/client/'));
app.use((req, res, next) => {
ssrHandler(req, res, next);
app.use(async (req, res, next) => {
const ssrHandlerPath = path.join(__dirname, 'dist', 'server', 'entry.mjs');
import(ssrHandlerPath).then(({ handler: ssrHandler }) => {
ssrHandler(req, res, next);
}).catch(async err => {
renderPlaceholderPage(res, 'notCompiledSsrHandler', err.message);
});
});
}