public static async Task <Book> GetBook(string id, string uri, string folder, CancellationToken cancellationToken,
Action <string> onProcess, Action <Book> onParsed, Action <Book> onCompleted, Action <Book, Exception> onError,
Action <string, List <string> > onChapterCompleted, Action <string, Exception> onChapterError,
Action <string, string> onDownloadFileCompleted, Action <string, Exception> onDownloadFileError,
int crawlMethod)
{
cancellationToken.ThrowIfCancellationRequested();
Stopwatch stopwatch = new Stopwatch();
stopwatch.Start();
// parse book
Book book = null;
try
{
book = await ISach.ParseBook(uri, cancellationToken);
book.PermanentID = string.IsNullOrWhiteSpace(id) ? Utility.GetUUID() : id;
if (string.IsNullOrWhiteSpace(book.Title) && onError != null)
{
onError(book, new InformationInvalidException("The book is invalid"));
return(null);
}
else if (onParsed != null)
{
onParsed(book);
}
}
catch (Exception ex)
{
if (onError != null)
{
onError(book, ex);
return(null);
}
else
{
throw ex;
}
}
// fetch chapters
book = await ISach.FetchChapters(book, folder, cancellationToken, onProcess, onChapterCompleted, onChapterError, onDownloadFileCompleted, onDownloadFileError, crawlMethod);
stopwatch.Stop();
if (onProcess != null)
{
onProcess("..... Total times for processing: " + stopwatch.GetElapsedTimes());
}
// callback when done
if (onCompleted != null)
{
onCompleted(book);
}
return(book);
}
public static async Task <BookSelf> GetBookSelf(string urlPattern, List <string> parameters, int currentPage, int totalPages, CancellationToken cancellationToken, Action <BookSelf> onCompleted, Action <BookSelf, Exception> onError)
{
BookSelf bookself = new BookSelf();
bookself.UrlPattern = string.IsNullOrWhiteSpace(urlPattern) ? "http://isach.info/mobile/story.php?list=story&order=created_date&page={0}" : urlPattern.Trim();
bookself.UrlParameters = parameters != null && parameters.Count > 0 ? parameters : new List <string>();
bookself.UrlParameters.Add((currentPage > 1 ? currentPage : 1).ToString());
bookself.CurrentPage = currentPage > 1 ? currentPage : 1;
bookself.TotalPages = totalPages;
return(await ISach.GetBookSelf(bookself, cancellationToken, onCompleted, onError));
}
public static List <string> ParseChapter(string html)
{
int start = html.IndexOf("<div class='chapter_navigator'>", StringComparison.OrdinalIgnoreCase);
if (start < 0)
{
start = html.IndexOf("<div class='mobile_chapter_navigator'>", StringComparison.OrdinalIgnoreCase) > 0
? html.IndexOf("<div class='mobile_chapter_navigator'>", StringComparison.OrdinalIgnoreCase)
: html.IndexOf("<div id='story_detail'", StringComparison.OrdinalIgnoreCase);
}
start = html.IndexOf("ms_chapter", start + 1, StringComparison.OrdinalIgnoreCase);
start = start < 0 ? -1 : html.IndexOf(">", start + 1, StringComparison.OrdinalIgnoreCase);
int end = start < 0 ? -1 : html.IndexOf("</div>", start + 1, StringComparison.OrdinalIgnoreCase);
string title = (start > -1 && end > -1 ? html.Substring(start + 1, end - start - 1).Trim() : "").GetNormalized();
while (title.IndexOf(" ") > -1)
{
title = title.Replace(" ", " ");
}
if (!title.Equals(""))
{
start = html.IndexOf("<div", start + 1, StringComparison.OrdinalIgnoreCase);
if (title.IndexOf("<div id='dropcap", StringComparison.OrdinalIgnoreCase) > -1 || title.IndexOf("<div id ='dropcap", StringComparison.OrdinalIgnoreCase) > -1)
{
title = "";
}
else if (title.ToLower().Equals("null"))
{
title = "";
}
}
else
{
start = html.IndexOf("<span class='dropcap", start + 1, StringComparison.OrdinalIgnoreCase);
if (start < 0)
{
if (html.StartsWith("<div class='ms_text"))
{
start = 0;
}
else
{
start = html.IndexOf("ms_chapter", start + 1, StringComparison.OrdinalIgnoreCase) > 0
? html.IndexOf("ms_chapter", start + 1, StringComparison.OrdinalIgnoreCase)
: html.IndexOf("<div style='height: 50px;'></div>", end + 1, StringComparison.OrdinalIgnoreCase) < html.IndexOf("<div class='ms_text'>", end + 1, StringComparison.OrdinalIgnoreCase)
? html.IndexOf("<div style='height: 50px;'></div>", end + 1, StringComparison.OrdinalIgnoreCase)
: -1;
start = start < 0 ? html.IndexOf("<div class='ms_text'>", end + 1, StringComparison.OrdinalIgnoreCase) : html.IndexOf("</div>", start + 1, StringComparison.OrdinalIgnoreCase) + 6;
}
}
}
end = html.IndexOf("<div style='height: 50px;'></div>", start + 1, StringComparison.OrdinalIgnoreCase);
if (end < 0)
{
end = html.IndexOf("<div class='navigator_bottom'>", start + 1, StringComparison.OrdinalIgnoreCase);
if (end < 0)
{
end = html.IndexOf("<div class='mobile_chapter_navigator'>", start + 1, StringComparison.OrdinalIgnoreCase);
}
if (end < 0)
{
end = html.IndexOf("</form>", start + 1, StringComparison.OrdinalIgnoreCase);
}
}
string body = start > -1 && end > -1 ? html.Substring(start, end - start).Trim() : "";
body = body.Replace(StringComparison.OrdinalIgnoreCase, "<div class='ms_text'>", "<p>").Replace(StringComparison.OrdinalIgnoreCase, "<div", "<p").Replace(StringComparison.OrdinalIgnoreCase, "</div>", "</p>");
if (body.StartsWith("<span class='dropcap", StringComparison.OrdinalIgnoreCase))
{
body = "<p>" + body;
}
start = body.IndexOf("<p", StringComparison.OrdinalIgnoreCase);
end = body.IndexOf("</p>", start + 1, StringComparison.OrdinalIgnoreCase);
while (start > -1 && end > -1)
{
int dropcap = body.IndexOf("'dropcap", start + 1, StringComparison.OrdinalIgnoreCase);
if (dropcap > -1 && dropcap < end)
{
string paragraph = body.Substring(start, end - start + 4);
body = body.Remove(start, end - start + 4);
string dropcapChar = "";
dropcap = paragraph.IndexOf("class=");
if (dropcap > 0)
{
dropcap += 7;
dropcapChar = paragraph.Substring(dropcap - 1, 1);
end = paragraph.IndexOf(dropcapChar, dropcap + 1);
dropcapChar = paragraph.Substring(dropcap, end - dropcap);
dropcapChar = dropcapChar[dropcapChar.Length - 1].ToString();
}
paragraph = Utility.RemoveTag(Utility.RemoveTag(paragraph, "p"), "span").Trim();
if (paragraph.Equals(""))
{
paragraph = dropcapChar;
}
body = body.Insert(start, (body.StartsWith("<p>") ? "" : "<p>") + paragraph);
}
start = body.IndexOf("<p", start + 1, StringComparison.OrdinalIgnoreCase);
end = body.IndexOf("</p>", start + 1, StringComparison.OrdinalIgnoreCase);
}
body = ISach.NormalizeBody(body.Replace(" \n", "").Replace("\r", "").Replace("\n", ""));
if (title.Equals("") &&
(body.StartsWith("<p>Quyển ", StringComparison.OrdinalIgnoreCase) ||
body.StartsWith("<p>Phần ", StringComparison.OrdinalIgnoreCase) || body.StartsWith("<p>Chương ", StringComparison.OrdinalIgnoreCase)))
{
start = 0;
end = body.IndexOf("</p>") + 4;
title = Utility.RemoveTag(body.Substring(0, end - start), "p").Trim();
body = body.Remove(0, end - start);
}
return(new List <string>()
{
title, body
});
}
public static async Task <List <string> > GetChapter(string uri, string referUri, CancellationToken cancellationToken)
{
return(ISach.ParseChapter(await Utility.GetWebPageAsync(uri.Replace("/mobile//", "/mobile/"), referUri, Utility.SpiderUserAgent, cancellationToken)));
}
public static async Task <Book> FetchChapters(Book book, string folder, CancellationToken cancellationToken, Action <string> onProcess,
Action <string, List <string> > onChapterCompleted, Action <string, Exception> onChapterError,
Action <string, string> onDownloadFileCompleted, Action <string, Exception> onDownloadFileError,
int crawlMethod)
{
// fetch chapters
Func <Task> fastCrawl = async() =>
{
int chaptersOfBigBook = 39;
int normalDelayMin = 456, normalDelayMax = 1234;
int mediumDelayMin = 2345, mediumDelayMax = 4321, longDelayMin = 3456, longDelayMax = 5678;
int step = 7, start = 0;
int end = start + step;
bool isCompleted = false;
while (!isCompleted)
{
List <Task> fetchingTasks = new List <Task>();
for (int index = start; index < end; index++)
{
if (index >= book.Chapters.Count)
{
isCompleted = true;
break;
}
string chapterUrl = book.ChapterUrls[index];
if (chapterUrl.Equals("") || !chapterUrl.StartsWith("http://isach.info"))
{
continue;
}
string referUri = index > 0 && index < book.ChapterUrls.Count ? book.ChapterUrls[index - 1] : book.SourceUri;
if (referUri.Equals(""))
{
referUri = book.SourceUri;
}
fetchingTasks.Add(Task.Run(async() =>
{
int delay = book.ChapterUrls.Count > chaptersOfBigBook
? Utility.GetRandomNumber(mediumDelayMin, mediumDelayMax)
: Utility.GetRandomNumber(normalDelayMin, normalDelayMax);
await Task.Delay(delay, cancellationToken);
try
{
List <string> contents = await ISach.GetChapter(chapterUrl, referUri, cancellationToken);
int chapterIndex = book.ChapterUrls.IndexOf(chapterUrl);
if (contents != null && (!contents[0].Equals("") || !contents[1].Equals("")))
{
string title = contents[0];
if (string.IsNullOrWhiteSpace(title) && book.TOCs != null && book.TOCs.Count > chapterIndex)
{
title = book.GetTOCItem(chapterIndex);
contents[0] = title;
}
book.Chapters[chapterIndex] = (!string.IsNullOrWhiteSpace(contents[0]) ? "<h1>" + contents[0] + "</h1>" : "")
+ (contents[1].Equals("") ? "--(empty)--" : contents[1]);
}
if (onChapterCompleted != null)
{
contents.Add(chapterIndex.ToString());
contents.Add(book.Chapters.Count.ToString());
onChapterCompleted(chapterUrl, contents);
}
}
catch (Exception ex)
{
if (onChapterError != null)
{
onChapterError(chapterUrl, ex);
}
}
}, cancellationToken));
}
await Task.WhenAll(fetchingTasks);
// go next
if (!isCompleted)
{
start += step;
end += step;
if (end <= book.Chapters.Count)
{
await Task.Delay(Utility.GetRandomNumber(longDelayMin, longDelayMax), cancellationToken);
}
}
}
};
Func <Task> slowCrawl = async() =>
{
int chaptersOfLargeBook = 69, mediumPausePointOfLargeBook = 6, longPausePointOfLargeBook = 29;
int chaptersOfBigBook = 29, mediumPausePointOfBigBook = 3, longPausePointOfBigBook = 14;
int normalDelayMin = 456, normalDelayMax = 890, mediumDelay = 4321, longDelayOfBigBook = 7890, longDelayOfLargeBook = 15431;
int chapterCounter = 0, totalChapters = 0;
for (int index = 0; index < book.ChapterUrls.Count; index++)
{
if (!book.ChapterUrls[index].Equals("") && book.ChapterUrls[index].StartsWith("http://isach.info"))
{
totalChapters++;
}
}
int chapterIndex = -1;
while (chapterIndex < book.ChapterUrls.Count)
{
chapterIndex++;
string chapterUrl = chapterIndex < book.ChapterUrls.Count ? book.ChapterUrls[chapterIndex] : "";
if (chapterUrl.Equals("") || !chapterUrl.StartsWith("http://isach.info"))
{
continue;
}
int number = totalChapters > chaptersOfBigBook ? mediumPausePointOfLargeBook : mediumPausePointOfBigBook;
int delay = chapterCounter > (number - 1) && chapterCounter % number == 0 ? mediumDelay : Utility.GetRandomNumber(normalDelayMin, normalDelayMax);
if (totalChapters > chaptersOfLargeBook)
{
if (chapterCounter > longPausePointOfLargeBook && chapterCounter % (longPausePointOfLargeBook + 1) == 0)
{
if (onProcess != null)
{
onProcess("\r\n" + "..... Wait for few seconds before continue with more chapters......." + "\r\n");
}
delay = longDelayOfLargeBook;
}
}
else if (totalChapters > chaptersOfBigBook)
{
if (chapterCounter > longPausePointOfBigBook && chapterCounter % (longPausePointOfBigBook + 1) == 0)
{
if (onProcess != null)
{
onProcess("\r\n" + "..... Wait for few seconds before continue with more chapters......." + "\r\n");
}
delay = longDelayOfBigBook;
}
}
await Task.Delay(delay, cancellationToken);
try
{
string referUri = chapterIndex > 0 && chapterIndex < book.ChapterUrls.Count ? book.ChapterUrls[chapterIndex - 1] : book.SourceUri;
if (referUri.Equals(""))
{
referUri = book.SourceUri;
}
List <string> contents = await ISach.GetChapter(chapterUrl, referUri, cancellationToken);
cancellationToken.ThrowIfCancellationRequested();
if (contents != null && (!contents[0].Equals("") || !contents[1].Equals("")))
{
string title = contents[0];
if (string.IsNullOrWhiteSpace(title) && book.TOCs != null && book.TOCs.Count > chapterIndex)
{
title = book.GetTOCItem(chapterIndex);
contents[0] = title;
}
else if (book.TOCs != null && book.TOCs.Count > chapterIndex && book.TOCs[chapterIndex].IndexOf(title, StringComparison.OrdinalIgnoreCase) < 0)
{
book.TOCs[chapterIndex] = title;
}
book.Chapters[chapterIndex] = (!string.IsNullOrWhiteSpace(contents[0]) ? "<h1>" + contents[0] + "</h1>" : "")
+ (contents[1].Equals("") ? "--(empty)--" : contents[1]);
}
if (onChapterCompleted != null)
{
contents.Add((chapterIndex + 1).ToString());
contents.Add(book.Chapters.Count.ToString());
onChapterCompleted(chapterUrl, contents);
}
}
catch (Exception ex)
{
if (onChapterError != null)
{
onChapterError(chapterUrl, ex);
}
}
chapterCounter++;
}
};
bool useFastMethod = crawlMethod.Equals((int)CrawMethods.Fast);
if (!useFastMethod && !crawlMethod.Equals((int)CrawMethods.Slow))
{
useFastMethod = Utility.GetRandomNumber() % 7 == 0;
}
if (useFastMethod)
{
await fastCrawl();
}
else
{
await slowCrawl();
}
// download media files
List <Task> downloadingTasks = new List <Task>();
string folderPath = (string.IsNullOrWhiteSpace(folder) ? "" : folder + "\\") + Utils.MediaFolder;
if (!string.IsNullOrWhiteSpace(book.Cover) && !book.Cover.StartsWith(Utils.MediaUri))
{
string filename = Utils.GetFilename(book.Cover);
book.MediaFiles.Add(filename);
string referUri = book.ChapterUrls.Count > 0 ? book.ChapterUrls[0] : ISach.ReferUri;
if (referUri.IndexOf("&chapter=") > 0)
{
referUri = referUri.Substring(0, referUri.IndexOf("&chapter="));
}
downloadingTasks.Add(Utils.DownloadFileAsync(book.Cover, referUri, folderPath, book.PermanentID, cancellationToken, onDownloadFileCompleted, onDownloadFileError));
book.Cover = Utils.MediaUri + filename;
}
for (int index = 0; index < book.Chapters.Count; index++)
{
object[] data = Utils.NormalizeMediaFiles(book.Chapters[index]);
if (data == null || data.Length < 1)
{
continue;
}
book.Chapters[index] = data[0] as string;
foreach (string fileUri in data[1] as List <string> )
{
if (fileUri.StartsWith(Utils.MediaUri))
{
continue;
}
string uri = (!fileUri.StartsWith("http://") ? "http://isach.info" : "") + (!fileUri.StartsWith("/") ? "/" : "") + fileUri;
string filename = Utils.GetFilename(uri);
if (book.MediaFiles.Contains(filename))
{
continue;
}
book.MediaFiles.Add(filename);
downloadingTasks.Add(Utils.DownloadFileAsync(uri, ISach.ReferUri, folderPath, book.PermanentID, cancellationToken, onDownloadFileCompleted, onDownloadFileError));
}
}
await Task.WhenAll(downloadingTasks);
// normalize TOC
book.NormalizeTOCs();
// return information
return(book);
}
public static async Task <Book> ParseBook(string uri, CancellationToken cancellationToken)
{
// get identity
string url = "/mobile/story.php?story=" + Book.GetIdentity(uri);
Book book = new Book();
book.Source = "isach.info";
book.SourceUri = "http://isach.info" + url;
string html = await Utility.GetWebPageAsync(book.SourceUri, ISach.ReferUri, Utility.SpiderUserAgent, cancellationToken);
// check permission
if (html.IndexOf("Để đọc tác phẩm này, được yêu cầu phải đăng nhập", StringComparison.OrdinalIgnoreCase) > 0)
{
throw new InformationNotFoundException("Access denied: Để đọc tác phẩm này, được yêu cầu phải đăng nhập");
}
// title
int start = html.IndexOf("ms_title", StringComparison.OrdinalIgnoreCase);
start = start < 0 ? -1 : html.IndexOf("<a", start + 1, StringComparison.OrdinalIgnoreCase);
start = start < 0 ? -1 : html.IndexOf(">", start + 1, StringComparison.OrdinalIgnoreCase);
int end = start < 0 ? -1 : html.IndexOf("<", start + 1, StringComparison.OrdinalIgnoreCase);
if (start > 0 && end > 0)
{
book.Title = html.Substring(start + 1, end - start - 1).GetNormalized();
}
// author
start = html.IndexOf("Tác giả:", StringComparison.OrdinalIgnoreCase);
start = start < 0 ? -1 : html.IndexOf("<a", start + 1, StringComparison.OrdinalIgnoreCase);
start = start < 0 ? -1 : html.IndexOf(">", start + 1, StringComparison.OrdinalIgnoreCase);
end = start < 0 ? -1 : html.IndexOf("<", start + 1, StringComparison.OrdinalIgnoreCase);
if (start > 0 && end > 0)
{
book.Author = Book.GetAuthor(html.Substring(start + 1, end - start - 1).Trim());
}
// category
start = html.IndexOf("Thể loại:", StringComparison.OrdinalIgnoreCase);
start = start < 0 ? -1 : html.IndexOf("<a", start + 1, StringComparison.OrdinalIgnoreCase);
start = start < 0 ? -1 : html.IndexOf(">", start + 1, StringComparison.OrdinalIgnoreCase);
end = start < 0 ? -1 : html.IndexOf("<", start + 1, StringComparison.OrdinalIgnoreCase);
if (start > 0 && end > 0)
{
book.Category = Book.GetCategory(html.Substring(start + 1, end - start - 1)).GetNormalized();
}
// original
start = html.IndexOf("Nguyên tác:", StringComparison.OrdinalIgnoreCase);
end = start < 0 ? -1 : html.IndexOf("<", start + 1, StringComparison.OrdinalIgnoreCase);
if (start > 0 && end > 0)
{
book.Original = html.Substring(start + 11, end - start - 11).Trim().GetNormalized();
}
// translator
start = html.IndexOf("Dịch giả:", StringComparison.OrdinalIgnoreCase);
start = start < 0 ? -1 : html.IndexOf("<a", start + 1, StringComparison.OrdinalIgnoreCase);
start = start < 0 ? -1 : html.IndexOf(">", start + 1, StringComparison.OrdinalIgnoreCase);
end = start < 0 ? -1 : html.IndexOf("<", start + 1, StringComparison.OrdinalIgnoreCase);
if (start > 0 && end > 0)
{
book.Translator = html.Substring(start + 1, end - start - 1).Trim().GetNormalized();
}
// cover image
start = html.IndexOf("ms_image", StringComparison.OrdinalIgnoreCase);
start = start < 0 ? -1 : html.IndexOf("src='", start + 1, StringComparison.OrdinalIgnoreCase);
end = start < 0 ? -1 : html.IndexOf("'", start + 5, StringComparison.OrdinalIgnoreCase);
if (start > 0 && end > 0)
{
book.Cover = "http://isach.info" + html.Substring(start + 5, end - start - 5).Trim();
}
// chapters
if (!book.Cover.Equals(""))
{
start = html.IndexOf("<a href='" + url, StringComparison.OrdinalIgnoreCase);
end = start < 0 ? -1 : html.IndexOf("'", start + 9, StringComparison.OrdinalIgnoreCase);
if (start > -1 && end > -1)
{
string tocUrl = "http://isach.info" + html.Substring(start + 9, end - start - 9).Trim();
await Task.Delay(Utility.GetRandomNumber(123, 432));
html = await Utility.GetWebPageAsync(tocUrl, url, Utility.SpiderUserAgent, cancellationToken);
}
}
start = html.IndexOf("ms_chapter", StringComparison.OrdinalIgnoreCase);
if (start < 0)
{
start = html.IndexOf("<div id='c0000", StringComparison.OrdinalIgnoreCase);
}
start = start < 0 ? -1 : html.IndexOf("<div", start + 1, StringComparison.OrdinalIgnoreCase);
end = start < 0 ? -1 : html.IndexOf("</form>", start + 1, StringComparison.OrdinalIgnoreCase);
if (start < 0 || end < 0)
{
List <string> contents = ISach.ParseChapter(html);
book.Chapters.Add((!string.IsNullOrWhiteSpace(contents[0]) ? "<h1>" + contents[0] + "</h1>" + "\n" : "") + contents[1]);
}
else
{
html = html.Substring(start, end - start).Trim();
start = html.IndexOf("<a href='", StringComparison.OrdinalIgnoreCase);
while (start > -1)
{
end = html.IndexOf("'", start + 9, StringComparison.OrdinalIgnoreCase);
string chapterUrl = html.Substring(start + 9, end - start - 9).Trim();
while (chapterUrl.StartsWith("/"))
{
chapterUrl = chapterUrl.Right(chapterUrl.Length - 1);
}
chapterUrl = (!chapterUrl.StartsWith("http://isach.info") ? "http://isach.info/mobile/" : "") + chapterUrl;
if (chapterUrl.IndexOf("&chapter=") < 0)
{
chapterUrl += "&chapter=0001";
}
book.Chapters.Add(chapterUrl);
book.ChapterUrls.Add(chapterUrl);
start = html.IndexOf(">", start + 1, StringComparison.OrdinalIgnoreCase) + 1;
end = html.IndexOf("<", start + 1, StringComparison.OrdinalIgnoreCase);
book.TOCs.Add(html.Substring(start, end - start).GetNormalized());
start = html.IndexOf("<a href='", start + 1, StringComparison.OrdinalIgnoreCase);
}
}
if (book.ChapterUrls.Count < 1 && (book.Chapters.Count < 1 || book.Chapters[0].Equals("")))
{
List <string> contents = ISach.ParseChapter(html);
book.Chapters.Add((!string.IsNullOrWhiteSpace(contents[0]) ? "<h1>" + contents[0] + "</h1>" + "\n" : "") + contents[1]);
}
return(book);
}
public static string NormalizeBody(string input)
{
return(ISach.NormalizeBody(input, -1));
}
