[es] - HTML data extraction in C#: well paid one-time jobs

HTML data extraction in C#: well paid one-time jobs

^{03.08.2014. u 14:43 - pre 118 meseci}

Oglas je na engleskom (copy pasted), korespodencija moze i na srpskom.

A number of HTML parsers needs to be written (or existing parsers to be fixed) in C# and PHP. Their purpose is to extract useful information from various airline websites, respecting the websites' terms and conditions. Each parser is a C# class inherited from our base class. Each class is almost never longer than 250 lines of quality code. A small additional parser in PHP needs to be written as well (<50 lines). The list of websites, the necessary base code, detailed step-by-step instructions as well as a couple of examples are provided.

Experience in .net framework, htt(p) protocol [get, post, cookies] and regular expressions is essential. You must be able to write clean efficient code. Interest in airlines or online travel industry is a plus.

Work from home and write as many classes as you wish, choosing any from the provided list. Payment is by Paypal, Skrill or bank transfer and starts at 100 euro per each submitted class. Fixed parsers are valued between 20 euro and 100 euro.

Interested applicants should contact [email protected].

A simple example is provided below.

Code:

using System;
using System.Collections.Generic;
using System.Text;
using System.Collections.Specialized;
using System.Globalization;
using System.Text.RegularExpressions;

namespace Azuon
{
    class AirArabia : Airline
    {
        protected override string dataStr
        {
            get
            {
                return
@"http://

GetCookie
HEAD www.airarabia.com/home

[no]

[no]

SearchFare
POST reservationsma.airarabia.com/ibe/public/showReservation.action

[no]

hdnCarrier
hdnDesign    0
hdnLanguage
hdnParamUrl

GetJSON
POST reservationsma.airarabia.com/ibe/public/availabilitySearchCalendar.action?requestID=1

[no]

fareQuoteJson
flexiSelection
searchParams.departureVariance    3
searchParams.returnVariance    3
searchParams.selectedCurrency    EUR
searchParams.fareType    A
searchParams.searchSystem    INT
searchParams.classOfService    Y
searchParams.firstDeparture
searchParams.lastArrival
selectedFlightJson
searchParams.halfReturnFareQuote
searchParams.stayOverTimeInMillis
searchParams.fromAirportSubStation
searchParams.toAirportSubStation
searchParams.fareQuoteLogicalCCSelection
searchParams.quoteOutboundFlexi    true
searchParams.quoteInboundFlexi    true
searchParams.flexiSelected
";
            }
        }

        public AirArabia()
        {
            name = "Air Arabia";
            code = "G9";
            LUGGAGE_FEE = 0;
            DOUBLE_BOOKING_FEE_FOR_ROUND_TRIP = false;
            paymentMethods = new Dictionary<string, float> {
                { "Visa", 0 },
                { "Mastercard", 0}};
        }

        protected override NameValueCollection getSearchParameters(Query query)
        {
            NameValueCollection pars = new NameValueCollection();
            pars.Add("hdnParamData",
                "EN^AS^" +
                query.origin.code + "^" +
                query.destination.code + "^" +
                query.dates[0].ToString("dd/MM/yyyy", CultureInfo.InvariantCulture) + "^" +
                (query.isRound() ? query.dates[1].ToString("dd/MM/yyyy", CultureInfo.InvariantCulture) : "") + "^" +
                "0^0^EUR^" +
                query.passgs.adults.ToString() + "^" +
                query.passgs.children.ToString() + "^" +
                query.passgs.infants.ToString() + "^" +
                "FROM^TO^" +
                query.isRound().ToString().ToLower());
            return pars;
        }

        protected override bool parseFares(Query query, string html, List<Fare>[] foundFares)
        {
            var pars = new NameValueCollection() {
                { "searchParams.adultCount", query.passgs.adults.ToString() },
                { "searchParams.childCount", query.passgs.children.ToString() },
                { "searchParams.infantCount", query.passgs.infants.ToString() },
                { "searchParams.fromAirport", query.origin.code },
                { "searchParams.toAirport", query.destination.code},
                { "searchParams.departureDate", query.dates[0].ToString("dd/MM/yyyy", CultureInfo.InvariantCulture)},
                { "searchParams.returnDate", query.isRound() ? query.dates[1].ToString("dd/MM/yyyy", CultureInfo.InvariantCulture) : "" },
                { "searchParams.returnFlag", query.isRound().ToString() },
                { "searchParams.fromAirportName", query.origin.name },
                { "searchParams.toAirportName", query.destination.name }
            };

            var json = executeCommand("GetJSON", pars, true);

            var mFare = new Regex(
                "\"calDisplayAmout\":(?<price>[0-9]+)," +
                ".+?" +
                "\"returnFlag\":(?<dir>true|false)," +
                "\"segments\":\\[(?<legs>[^]]+)\\]", RegexOptions.Singleline).Match(json);

            if (!mFare.Success)
            {
                return false;
            }

            while (mFare.Success)
            {
                var isOutbound = mFare.Groups["dir"].Value == "false";
                var fare = new Fare(query, isOutbound);

                const int INFANT_FEE = 30;

                fare.price = Convert.ToSingle(mFare.Groups["price"].Value) * query.passgs.Count() + INFANT_FEE * query.passgs.infants;

                var sLegs = mFare.Groups["legs"].Value;

                // take departure of 1st leg
                var depUnixSeconds = new Regex(
                    "\"departureTimeLong\":(?<num>[0-9]+),").Match(sLegs);

                fare.departTime = Utils.unixStart.AddSeconds(Convert.ToInt64(depUnixSeconds.Groups["num"].Value) / 1000);

                // take arrival of last leg
                var arrUnixSeconds = new Regex(
                    "\"arrivalTimeLong\":(?<num>[0-9]+),", RegexOptions.RightToLeft).Match(sLegs);

                fare.arriveTime = Utils.unixStart.AddSeconds(Convert.ToInt64(arrUnixSeconds.Groups["num"].Value) / 1000);

                var mVia = new Regex(
                    "\"segmentShortCode\":\"\\w\\w\\w[^A-Z]+(?<via>\\w\\w\\w)\"").Match(sLegs);

                var sVia = mVia.Groups["via"].Value;

                if ((isOutbound && sVia != query.destination.code) ||
                    (!isOutbound && sVia != query.origin.code))
                {
                    fare.setVia(sVia);
                }

                foundFares[Convert.ToByte(!isOutbound)].Add(fare);

                mFare = mFare.NextMatch();
            }

            return true;
        }
    }