Category: JavaScript

Sometimes, we want to upload a file to Amazon S3 with Node.js.

In this article, we’ll look at how to upload a file to Amazon S3 with Node.js.

How to upload a file to Amazon S3 with Node.js?

To upload a file to Amazon S3 with Node.js, we can use the putObject method.

For instance, we write

const AWS = require('aws-sdk');
AWS.config.update({
  accessKeyId: 'accessKeyId',
  secretAccessKey: 'secretAccessKey',
  region: 'region'
});

const upload = async () => {
  const params = {
    Bucket: "yourBucketName",
    Key: 'someUniqueKey',
    Body: 'someFile'
  };
  try {
    let uploadPromise = await new AWS.S3().putObject(params).promise();
    console.log("Successfully uploaded data to bucket");
  } catch (e) {
    console.log(e);
  }
}

to define the upload function that calls putObject with the params object to upload the file that’s set as the value of Body.

We set the Bucket and Key to set the bucket and key that we use to access the uploaded file.

And then we call promise to return a promise that resolves when the upload is done.

Conclusion

To upload a file to Amazon S3 with Node.js, we can use the putObject method.

Sometimes, we want to decompress a Node.js request’s module gzip response body.

In this article, we’ll look at how to decompress a Node.js request’s module gzip response body.

How to decompress a Node.js request’s module gzip response body?

To decompress a Node.js request’s module gzip response body, we can set the encoding option to null and then use the zlib.gunzip method.

For instance, we write

const request = require('request');
const zlib = require('zlib');

request(url, {
  encoding: null
}, (err, response, body) => {
  if (response.headers['content-encoding'] === 'gzip') {
    zlib.gunzip(body, (err, unzipped) => {
      callback(unzipped.toString());
    });
  } else {
    callback(body);
  }
});

to call request with an object that has encoding set to null.

Then in the callback, we check if the content-encoding response header is 'gzip'.

If it is, then we call zlib.gunzip to decompress the response body.

And then we can get the unzipped response contents from the unzipped parameter in the gunzip callback.

Conclusion

To decompress a Node.js request’s module gzip response body, we can set the encoding option to null and then use the zlib.gunzip method.

Sometimes, we want to destroy a cookie with Node.js and Express.

In this article, we’ll look at how to destroy a cookie with Node.js and Express.

How to destroy a cookie with Node.js and Express?

To destroy a cookie with Node.js and Express, we can use the res.clearCookie method.

For instance, we write

res.clearCookie("key");

to call clearCookie with the 'key' of the cookie to delete the cookie with key 'key'.

Conclusion

To destroy a cookie with Node.js and Express, we can use the res.clearCookie method.

Sometimes, we want to get the redirected URL from the Node.js request module.

In this article, we’ll look at how to get the redirected URL from the Node.js request module.

How to get the redirected URL from the Node.js request module?

To get the redirected URL from the Node.js request module, we can get the redirected URL from res.headers.location property.

For instance, we write

const url = 'http://www.google.com';

request({
  url,
  followRedirect: false
}, (err, res, body) => {
  console.log(res.headers.location);
});

to call request with an object that has the followRedirect property set to true to follow redirects.

Then we can get the redirected URL from res.headers.location in the request callback after the request is done.

Conclusion

To get the redirected URL from the Node.js request module, we can get the redirected URL from res.headers.location property.

Sometimes, we want to modify the Node.js request default timeout time.

In this article, we’ll look at how to modify the Node.js request default timeout time.

How to modify the Node.js request default timeout time?

To modify the Node.js request default timeout time, we can set the timeout option when we call request.

For instance, we write

const options = {
  url: 'http://example.com',
  timeout: 120000
}

request(options, (err, resp, body) => {
  //...
});

to call request with options.

We set the timeout option to set the request timeout to 120000 milliseconds.

Conclusion

To modify the Node.js request default timeout time, we can set the timeout option when we call request.