Nodejs request: HPE_INVALID_HEADER_TOKEN

I had the same issue, running the code like this worked for me

nodemon --http-parser=legacy

The solution is this library: https://www.npmjs.com/package/http-parser-js

So to fix your problem:

1. npm install http-parser-js

2. Add this code before require('request')

   process.binding('http_parser').HTTPParser = require('http-parser-js').HTTPParser;
   

Had the same error and provided solutions are not working anymore in node v14 and v16.

I ended up using node-libcurl (with node v16.15.1)

const { Curl } = require('node-libcurl');

const curl = new Curl();

var api_URL = "https://www.......";

curl.setOpt('URL', api_URL);
curl.setOpt('FOLLOWLOCATION', true);
curl.setOpt(Curl.option.HTTPHEADER, ['Content-Type: application/json', 'Authorization: Bearer XYZ']);

curl.on('end', function(statusCode, data, headers) {

    // do something with the data you get..
    // .....

    this.close();

});

curl.on('error', curl.close.bind(curl));
curl.perform();

If you like to see how your Header looks like, add this option:

   curl.setOpt(Curl.option.VERBOSE, true);

Node v12 has a new parser that is more strict with header validation, which can cause the same errors, especially with sites using Imperva/Incapsula that include an invalid header in HTTP 1.1 responses.

A temporary solution is to use the --http-parser=legacy option in node's command line, or in the NODE_OPTIONS environment variable.

Since v12.15.0 and v10.19.0 you can do this:

http.request(url, { insecureHTTPParser: true })

Additional information can be found here: https://github.com/nodejs/node/issues/27711#issuecomment-584621376

Edit: --http-parser=legacy is no longer supported in recent versions (including minor versions of v12). A solution for newer node versions is to use --insecure-http-parser instead.