app2.js

const cheerio = require("cheerio");
const getContent = function(url) {
  // return new pending promise
  return new Promise((resolve, reject) => {
    // select http or https module, depending on reqested url
    const lib = url.startsWith('https') ? require('https') : require('http');

    const request = lib.get(url, (response) => {
      // handle http errors
      if (response.statusCode < 200 || response.statusCode > 299) {
         reject(new Error('Failed to load page, status code: ' + response.statusCode));
       }
      // temporary data holder
      const body = [];
      // on every content chunk, push it to the data array
      response.on('data', (chunk) => body.push(chunk));
      // we are done, resolve promise with those joined chunks
      response.on('end', () => resolve(body.join('')));
    });
    // handle connection errors of the request
    request.on('error', (err) => reject(err))
    })
};

var resultCount=0;

function getField(DOM, fieldName) {
  var $ = DOM;
  return $('.mainContent .row h4').filter(function(i, el) {
      // this === el 
      return $(this).text().toUpperCase().includes(fieldName.toUpperCase());
    }).next();
}

function getRow(url) {
  return getContent(url).then(function(data) {
    var $ = cheerio.load(data);
    var serviceName = $('.mainContent .row h1').text();
    var phoneNumber = getField($, 'Phone').text();
    var emailAddress = getField($, 'Email').text();
    var postTown = getField($, 'Address').contents().eq(-3).text();

    return {url: url, serviceName: serviceName, phoneNumber: phoneNumber, emailAddress: emailAddress, postTown: postTown};
  })
}

function getPage(p) {
  return getContent('http://www.homeless.org.uk/homeless-england/search?search_api_views_fulltext=&field_homeless_link_member=All&page=' + p).then(function(data) {

    var $ = cheerio.load(data);

/*  Extract total responses from "Displaying 1 - 25 of 2146 services. Use the text search and keywords on the right to narrow this list." */

    var total = parseInt($('.view em').text().match(" of (.*) service")[1]);

    if (resultCount == 0) {
      console.log('<h1>Total number of services: ' + total + '</h1>');
    };

    var pageList = $('.listings li').length;
/*    console.log(pageList); */
    resultCount+=pageList;
    $('.listings li h3').each(function( index ) {
      getRow('http://www.homeless.org.uk' + $( this ).children('a').attr('href')).then(function (data) {
        if (data.postTown.toUpperCase() === 'LONDON') {
          console.log('<p><a href="' + data.url + '">' + data.serviceName + '</a> Phone : ' + data.phoneNumber + ' Email : ' + data.emailAddress + ' Town : ' + data.postTown);
        }
      })
    });
    if (resultCount < total) {
      getPage(p+1);
    };
  }, function (err) {
    console.error(err);
  });
};

getPage(0);