mirror of https://github.com/dapr/quickstarts.git
56 lines
2.1 KiB
JavaScript
56 lines
2.1 KiB
JavaScript
const express = require('express');
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const path = require('path');
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const request = require('request');
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const app = express();
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const port = 8080;
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const daprPort = process.env.DAPR_HTTP_PORT || 3500;
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const daprUrl = `http://localhost:${daprPort}/v1.0/invoke`;
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// The name of the state store is specified in the components yaml file.
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// For this sample, state store name is specified in the file at: https://github.com/dapr/quickstarts/blob/master/hello-kubernetes/deploy/redis.yaml#L4
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const stateStoreName = `statestore`;
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const stateUrl = `http://localhost:${daprPort}/v1.0/state/${stateStoreName}`;
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/**
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The following routes forward requests (using pipe) from our React client to our dapr-enabled services. Our Dapr sidecar lives on localhost:<daprPort>. We invoke other Dapr enabled services by calling /v1.0/invoke/<DAPR_ID>/method/<SERVICE'S_ROUTE>.
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*/
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app.post('/calculate/add', async (req, res) => {
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const addUrl = `${daprUrl}/addapp/method/add`;
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req.pipe(request(addUrl)).pipe(res);
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});
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app.post('/calculate/subtract', async (req, res) => {
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const subtractUrl = `${daprUrl}/subtractapp/method/subtract`;
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req.pipe(request(subtractUrl)).pipe(res);
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});
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app.post('/calculate/multiply', async (req, res) => {
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const multiplyUrl = `${daprUrl}/multiplyapp/method/multiply`;
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req.pipe(request(multiplyUrl)).pipe(res);
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});
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app.post('/calculate/divide', async (req, res) => {
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const divideUrl = `${daprUrl}/divideapp/method/divide`;
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req.pipe(request(divideUrl)).pipe(res);
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});
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// Forward state retrieval to Dapr state endpoint
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app.get('/state', async (req, res) => req.pipe(request(`${stateUrl}/calculatorState`)).pipe(res));
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// Forward state persistence to Dapr state endpoint
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app.post('/persist', async (req, res) => req.pipe(request(stateUrl)).pipe(res));
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// Serve static files
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app.use(express.static(path.join(__dirname, 'client/build')));
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// For all other requests, route to React client
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app.get('*', function (_req, res) {
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res.sendFile(path.join(__dirname, 'client/build', 'index.html'));
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});
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app.listen(process.env.PORT || port, () => console.log(`Listening on port ${port}!`));
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