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server.js
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server.js
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const express = require("express");
const axios = require("axios");
const redis = require("redis");
const cors = require("cors");
var bodyParser = require("body-parser");
const dotenv = require("dotenv");
dotenv.config();
const app = express();
app.use(cors());
app.use(bodyParser.urlencoded({ extended: true }));
// setup redis client
const client = redis.createClient(
process.env.REDIS_PORT,
process.env.REDIS_HOST, {
auth_pass: process.env.REDIS_PASSWORD,
tls: { servername: process.env.REDIS_HOST },
}
);
// redis store configs
const storeRedisKey = "store:students"; // cahce key for users
const dataExpireTime = 3600; // 1 hour cache expire time
// main endpoint
app.get("/", (req, res) => res.send("✅ - SETU API working."));
// students endpoint with caching
app.get("/students", (req, res) => {
// try to fetch the result from redis
return client.get(storeRedisKey, (err, data) => {
if (data) {
return res.json({ source: "cache", data: JSON.parse(data) });
} else {
// if cache not available call API get data from remote API
axios
.get(process.env.DB_ACCESS_API)
.then((res) => res.data)
.then((data) => {
// save the API response in redis store
client.setex(storeRedisKey, dataExpireTime, JSON.stringify(data));
// send JSON response to client
return res.json({ source: "api", data });
})
.catch((error) => {
// send error to the client
return res.json(error.toString());
});
}
});
});
var multer = require("multer")();
const FormData = require("form-data");
// file uplaod endpoint
app.post("/reports/upload", multer.single("report"), (req, res) => {
try {
axios
.post(process.env.FUNCTION_URL, {
filedata: req.file.buffer,
filename: req.file.originalname,
})
.then((Res) => {
if (Res.status === 200) {
return res.status(200).send();
} else {
throw error;
}
})
.catch((e) => {
return res.status(400).send();
});
} catch (e) {
console.error(e);
}
});
// start express server
const PORT = process.env.PORT || 5000;
app.listen(PORT, () => {
console.log("Server listening on port:", PORT);
});