/// <summary>
/// Creates the feed.
/// </summary>
/// <param name="parameters">The parameters.</param>
private void CreateFeed(VacancySearchDetailForRssDTO parameters)
{
var vacancyController = new VacancyLogicService(new Data.VacancyDataService());
var results = vacancyController.GetVacanciesForRss(parameters);
SyndicationFeed feed = null;
var items = new List <SyndicationItem>();
if (results != null)
{
feed = new SyndicationFeed(results.FeedTitle, results.FeedDescription, new Uri(results.AlternateLink));
if (!string.IsNullOrWhiteSpace(results.FeedImageUrl))
{
feed.ImageUrl = new Uri(results.FeedImageUrl);
}
if (!string.IsNullOrWhiteSpace(results.FeedCopyrightInformation))
{
feed.Copyright = new TextSyndicationContent(results.FeedCopyrightInformation);
}
feed.Links.Add(new SyndicationLink(new Uri(Request.Url.ToString()), "self", null, "application/rss+xml", 1000));
//foreach and LINQ statements are slower than for loop
//even if they are more readable, and as performance is critical, I have stuck with for.
for (var i = 0; i < results.Vacancies.Count; i++)
{
var vacancyTitle = results.Vacancies[i].VacancyTitle;
var vacancyDesc = FormatFeed(results.Vacancies[i]);
string url = QueryStringHelper.CreateVacancyUrlForRssFeed(results.Vacancies[i]);
//Now create the RSS item
var item = new SyndicationItem(vacancyTitle, vacancyDesc, new Uri(url));
item.Categories.Add(new SyndicationCategory(results.Vacancies[i].ApprenticeshipFramework.Description));
item.Id = url;
//As it is using the vacancy DTO to deliver the results, possible start date is actually date the vacancy went live.
item.PublishDate = results.Vacancies[i].PossibleStartDate;
items.Add(item);
}
}
if (feed == null)
{
return;
}
feed.Items = items;
SyndicationFeedFormatter formatter;
string format = HttpContext.Current.Request.QueryString["format"] ?? "";
if (format.Trim().ToLower() == "atom")
{
Response.ContentType = "application/atom+xml";
formatter = new Atom10FeedFormatter(feed);
}
else
{
Response.ContentType = "application/rss+xml";
formatter = new Rss20FeedFormatter(feed);
}
var settings = new XmlWriterSettings {
NewLineHandling = NewLineHandling.None,
Indent = true,
Encoding = Encoding.UTF32,
ConformanceLevel = ConformanceLevel.Document,
OmitXmlDeclaration = true
};
var buffer = new StringBuilder();
var cachedOutput = new StringWriter(buffer);
using (XmlWriter writer = XmlWriter.Create(cachedOutput, settings))
{
if (writer != null)
{
formatter.WriteTo(writer);
writer.Close();
}
}
buffer.Replace(" xmlns:a10=\"http://www.w3.org/2005/Atom\"", " xmlns:atom=\"http://www.w3.org/2005/Atom\"");
buffer.Replace("a10:", "atom:");
Response.Output.Write(buffer.ToString());
}