public string GetLessonDownloadLink(Lesson lesson)
{
var postdata = string.Format(@"{{a:""{0}"", m:""{1}"", course:""{2}"", cn:{3}, mt:""mp4"", q:""1024x768"", cap:false, lc:""en""}}",
lesson.Author, lesson.Module.Name, lesson.Module.Course.Name, lesson.Number);
var tempUri = new Uri(_lessonDownloadUrl);
var encoding = new ASCIIEncoding();
var data = encoding.GetBytes(postdata);
var request = HttpWebRequest.Create(tempUri) as HttpWebRequest;
request.Method = "POST";
request.ContentType = "application/json;charset=UTF-8";
request.ContentLength = data.Length;
request.CookieContainer = _cookieContainer;
var newStream = request.GetRequestStream();
newStream.Write(data, 0, data.Length);
newStream.Close();
var responseHtml = request.GetResponse();
var r = new StreamReader(responseHtml.GetResponseStream());
return r.ReadToEnd();
}
private void DownloadLesson(Lesson lesson, string downloadFolder)
{
var lessonDownloadLink = _webScraper.GetLessonDownloadLink(lesson);
var lessonFullFilname = GetLessonFilenameForDownload(lesson, downloadFolder);
CreateDirectoryIfNotExists(lessonFullFilname);
new WebClient().DownloadFile(lessonDownloadLink,lessonFullFilname);
}
private string GetLessonFilenameForDownload(Lesson lesson, string downloadFolder)
{
return string.Format(@"{0}\{1}\{2}\{3}.wmv",
downloadFolder,
lesson.Module.Course,
lesson.Module,
lesson);
}
