server.js
For the full content of this gist, refer to https://gist.github.com/CodingAbdullah/3a6b96aabefed8c68ac68b10d7091546
McMaster. Software Engineer with a keen interest in blockchain and web3.
// Working with core built-in modules such as HTTP, FS, PATH, and so on.
require("dotenv").config({ path: '.env' });
const axios = require("axios");
const http = require('http'); // Core modules
const fs = require("fs");
const path = require('path');
http.createServer((req, res) => {
// Additional routes will go here
// Req object determines type of request and endpoint
// Unlike Express, all routing is handled inside the main server
res.setHeader('Access-Control-Allow-Headers', req.headers.origin); // Enabling CORS
res.setHeader('Access-Control-Allow-Origin', '*');
if (req.method === 'POST') {
if (req.url === '/one-post') {
// Make request to fetch post data
axios.post("https://jsonplaceholder.typicode.com/posts/1/comments", { method: 'POST' })
.then(response => {
let data = new Date().toISOString().split(".")[0] + ' - ' + 'STATUS CODE: 200. '
+ 'METHOD: POST. REQUEST TYPE: ONE POST. \r\n';
try {
// Log successful API call
fs.appendFileSync(path.join(__dirname, 'API.log'), data);
// Upon successful logging, send data back to client
res.writeHead(200, { 'content-type': 'application.json' });
res.end(JSON.stringify(response.data)); // Response sent
}
catch (err) {
// Send back error message
res.writeHead(500, { 'content-type': 'text/plain' });
res.end("Could not append data to file");
}
})
.catch(() => {
// Send back error response
res.writeHead(500, { 'content-type': 'text/plain' });
res.end('Could not fetch post data');
});
}
else if (req.url === '/posts') {
// Make request to fetch post data
axios.post("https://jsonplaceholder.typicode.com/posts", { method: 'POST' })
.then(response => {
let data = new Date().toISOString().split(".")[0] + ' - ' + 'STATUS CODE: 200. '
+ 'METHOD: POST. REQUEST TYPE: MULTIPLE POSTS. \r\n';
try {
// Log successful API call
fs.appendFileSync(path.join(__dirname, 'API.log'), data);
// Upon successful logging, send data back to client
res.writeHead(200, { 'content-type': 'application.json' });
res.end(JSON.stringify(response.data)); // Response sent
}
catch (err) {
// Send back error message
res.writeHead(500, { 'content-type': 'text/plain' });
res.end("Could not append data to file");
}
})
.catch(() => {
// Send back error response
res.writeHead(500, { 'content-type': 'text/plain' });
res.end('Could not fetch post data');
});
}
else {
// Send back error response
res.writeHead(400, { 'content-type' : 'text/plain' });
res.end("Invalid request");
}
}
else if (req.method === 'GET') {
if (req.url === '/bitcoin-data') {
// Fetch Bitcoin Data
axios.get('https://api.coingecko.com/api/v3/coins/bitcoin/market_chart?'
+ 'vs_currency=usd&days=1&interval=daily')
.then(response => {
let data = new Date().toISOString().split(".")[0] + ' - ' + 'STATUS CODE: 200. ' +
+ 'METHOD: GET. ' + 'REQUEST TYPE: BITCOIN DATA. \r\n';
try {
// Log successful API call
fs.appendFileSync(path.join(__dirname, 'API.log'), data);
// If appending data is successful, send back data
res.writeHead(200, { 'content-type': 'application/json' });
// Send back response
res.end(JSON.stringify(response.data));
}
catch (err) {
// Send back error response
res.writeHead(500, { 'content-type' : 'text/plain' });
res.end("Could not append data to file");
}
})
.catch(() => {
// Send back error response
res.writeHead(500, { 'content-type': 'text/plain' });
res.end('Could not fetch Bitcoin data');
});
}
else if (req.url === '/dual-coin-data') {
// Fetch Bitcoin Data
axios.get('https://api.coingecko.com/api/v3/coins/bitcoin/market_chart?'
+ 'vs_currency=usd&days=1&interval=daily')
.then(response => {
// Fetch Ethereum Data
axios.get('https://api.coingecko.com/api/v3/coins/ethereum/market_chart?'
+ 'vs_currency=usd&days=1&interval=daily')
.then(ethResponse => {
let data = new Date().toISOString().split(".")[0] + ' - ' + 'STATUS CODE: 200. ' +
+ 'METHOD: GET. ' + 'REQUEST TYPE: MULTI-COIN DATA. \r\n';
try {
// Log successful API call
fs.appendFileSync(path.join(__dirname, 'API.log'), data);
// If appending data is successful, send back data
res.writeHead(200, { 'content-type': 'application/json' });
let coinInformation = {
bitcoinResponse : response.data,
ethereumResponse : ethResponse.data
}
// Send back response
res.end(JSON.stringify(coinInformation));
}
catch (err) {
// Send error response back
res.writeHead(500, { 'content-type' : 'text/plain' });
res.end("Could not append data to file");
}
})
.catch(() => {
// Send back error response
res.writeHead(500, { 'content-type' : 'text/plain'});
res.end("Could not fetch coin data");
});
})
.catch(() => {
// Send back error response
res.writeHead(500, { 'content-type' : 'text/plain' });
res.end("Could not append data to file");
});
}
else {
// Send back error response
res.writeHead(400, { 'content-type': 'text/plain' });
res.end('Invalid request');
}
}
else {
// Writing a response for an invalid request type (GET/POST are acceptable)
res.writeHead(400, { 'content-type' : 'text/plain' });
res.end("Invalid request");
}
})
.listen(process.env.PORT || 8080, () => {
// Log PORT value
console.log("Listening to PORT " + process.env.PORT || 8080);
});