BrowserMob Proxy Client

A library built to interact with browsermob-proxy's REST Api. Browsermob proxy has not been updated in several years, it is unlikely that this library will see any substantial updates anytime soon

Setup

1. Ensure that you've downloaded browsermob-proxy and have it running
2. npm install browsermob-proxy-client-axios

Quick Start With Selenium

const webdriver = require("selenium-webdriver");
const By = webdriver.By;
const until = webdriver.until;
const selProxy = require("selenium-webdriver/proxy");
const bmpClient = require('browsermob-proxy-client-axios').createClient();
const fs = require("fs");
//need to require this or it looks for a globally installed chromedriver
const chromedriver = require("chromedriver");
const { ServiceBuilder, Options } = require("selenium-webdriver/chrome");

let harData;
let driver;
    // .setChromeService(serviceBuilder)
async function runBmp() {
  await bmpClient.start();
  await bmpClient.createHar();

  const hostPort = "localhost:" + bmpClient.proxy.port;
  let chromeOptions = new Options();

  // To collect all http request, need use chromeOptions --ignore-certificate-error
  // setProxy() no need to set.
  chromeOptions.addArguments(`--proxy-server=${hostPort}`);
  chromeOptions.addArguments("--ignore-certificate-errors");

  driver = new webdriver.Builder()
    .forBrowser("chrome")
    // .setProxy(selProxy.manual({ http: 'localhost:' + bmpClient.proxy.port }))
    .setChromeOptions(chromeOptions)
    .build();

  await driver.get("https://search.yahoo.com");
  await driver.sleep(5000);

  harData = await bmpClient.getHar();
  //do something
  console.log("harData:", harData);
}

runBmp()
  .then(async function () {
    console.log("harData.log.entries: ", harData.log.entries.length);
    fs.writeFileSync("yahoo.har", JSON.stringify(harData));
    console.log("Finished Successfully");

    await bmpClient.end();
    await driver.quit();
    process.exit([0]);
  })
  .catch(function (err) {
    console.error(err.message);
    console.error(err.stack);
    process.exit([1]);
  });

API

BrowserMobClient.createClient(config)

Synchronous function that instantiates a new client

• config

  {
    browserMob:{ // *optional* details on where browsermob is running
       host:'localhost',
       port: 8080,
       protocol:'http'
     },
     proxy:{ // *optional*
       port:8081,
       bindAddress: `192.168.1.222`
     }
  }

client.callRest(url, method, data)

Method to make direct calls to browsermob-proxy's REST API see browsermob-proxy for available urls. Returns a promise.

• url

  String - '/har' (see https://github.com/lightbody/browsermob-proxy#rest-api, for a list of endpoints)

• method

  String - 'GET, POST, DELETE, PUT'

• data

  Object - { enable: true }

client.closeProxies()

Returns a promise that closes all proxies running

client.createHar(options)

Returns a promise. Creates a har file on browsermob

• options

  {
    captureHeaders: - Boolean, capture headers or not.
                         Optional, default to "false".
  
    captureContent: - Boolean, capture content bodies or not.
                  Optional, default to "false".
  
    captureBinaryContent:  Boolean, capture binary content or not.
                     Optional, default to "false".
  
    initialPageRef: - The string name of The first page ref
                 that should be used in the HAR. Optional,
                 default to "Page 1".
  
    initialPageTitle: - The title of first HAR page. Optional,
                    default to initialPageRef.
  }

client.end()

Returns a promise that stops the proxy port

client.getHar()

Returns a promise that resolves to a har in JSON format

client.listProxies()

Resolves to { proxyList: [ { port: 8081 }, { port: 8082 }, { port: 8083 } ] }

client.setLimits(options)

sets limits on the proxy

• options

  {
    downstreamKbps: - Sets the downstream bandwidth limit in kbps. Optional.
  
    upstreamKbps: - Sets the upstream bandwidth limit kbps. Optional, by default unlimited.
  
    downstreamMaxKB: - Specifies how many kilobytes in total the client is allowed to download through the proxy. Optional, by default unlimited.
  
    upstreamMaxKB: - Specifies how many kilobytes in total the client is allowed to upload through the proxy. Optional, by default unlimited.
  
    latency: - Add the given latency to each HTTP request. Optional, by default all requests are invoked without latency.
  
    enable: - A boolean that enable bandwidth limiter. Optional, by default to "false", but setting any of the properties above will implicitly enable throttling
  
    payloadPercentage: - Specifying what percentage of data sent is payload, e.g. use this to take into account overhead due to tcp/ip. Optional.
  
    maxBitsPerSecond: - The max bits per seconds you want this instance of StreamManager to respect. Optional.
  }

client.start(options)

starts a port to use

• options

  {
    port: 'specify a port to start the proxy on',
    bindAddress: '192.168.1.222'    // if working in a multi-home env
  }

Development

Testing

1. Install dependencies npm install

2. Install and run browsermob-proxy

   npm run install-browsermob npm run start-browsermob

3. Run the tests

   npm test