I'm trying to do a GET request in node.js. I would like to access the result of the request but there is a problem. Here is the code :
const https = require('https');
var data;
https.get('https://www.example.com', (resp) => {
resp.on('data', (chunk) => {
data += chunk;
});
resp.on('end', () => {
console.log("Inside : "+data+"\n");
});
}).on("error", (err) => {
console.log("Error: " + err.message);
});
console.log("Outside : "+data+"\n"); The outside message appears before the inside one, and only the latter displays the request. That is due to asynchronous process I guess. But if I want to use my request outside, it's a problem because of this delay. How may I do?
Your code execute asyncronymos. http.get(...) execute, but programm don't wait result of your get. So when you do "console.log("Outside : "+data+"\n");" - your data is empty. You will never get data to outside message, without js constructions like async/await.
This is what you need:
(async function () {
const https = require('https');
var data;
await new Promise((resolve, reject) => {https.get('https://www.example.com', (resp) => {
resp.on('data', (chunk) => {
data += chunk;
});
resp.on('end', () => {
console.log("\n\n===>Inside : "+data+"\n");
resolve();
});
}).on("error", (err) => {
console.log("Error: " + err.message);
reject();
});
});
console.log("\n\n===>Outside : "+data+"\n");
})();
Thanks for answering. After searches, I made this, which work, but I don't know if it's the best way to do this.
const https = require('https');
var data;
(async function () {
var p = new Promise((resolve) => {https.get('https://www.example.com', (resp) => {
resp.on('data', (chunk) => {
data += chunk;
});
resp.on('end', () => {
console.log("\n\n===>Inside : "+data+"\n");
resolve();
});
}).on("error", (err) => {
console.log("Error: " + err.message);
});
});
await p;
console.log("\n\n===>Outside : "+data+"\n");
})();