fetch-har

fetch-har

Make a fetch request from a HAR definition.

Installation

npm install --save fetch-har

Usage

const fetchHar = require('fetch-har');

// If executing from an environment without `fetch`, you'll need to polyfill.
global.fetch = require('node-fetch');
global.Headers = require('node-fetch').Headers;
global.Request = require('node-fetch').Request;
global.FormData = require('form-data');

const har = {
  log: {
    entries: [
      {
        request: {
          headers: [
            {
              name: 'Authorization',
              value: 'Bearer api-key',
            },
            {
              name: 'Content-Type',
              value: 'application/json',
            },
          ],
          queryString: [{ name: 'a', value: 1 }, { name: 'b', value: 2 }],
          postData: {
            mimeType: 'application/json',
            text: '{"id":8,"category":{"id":6,"name":"name"},"name":"name"}',
          },
          method: 'POST',
          url: 'http://httpbin.org/post',
        },
      },
    ],
  },
};

fetchHar(har)
  .then(request => request.json())
  .then(console.log);

fetchHar(har, userAgent) => Promise

• har is a har file format.
• userAgent is an optional user agent string to let you declare where the request is coming from.

Performs a fetch request from a given HAR definition. HAR definitions can be used to list lots of requests but we only use the first from the log.entries array.

fetchHar.constructRequest(har, userAgent) => Request

• har is a har file format.
• userAgent is an optional user agent string to let you declare where the request is coming from.

We also export a second function which is used to construct a Request object from your HAR.

This function is mainly exported for testing purposes but could be useful if you want to construct a request but do not want to execute it right away.