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VinaBook.cs
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VinaBook.cs
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#region Related components
using System;
using System.Collections.Generic;
using System.Threading;
using System.Threading.Tasks;
using System.IO;
using Newtonsoft.Json.Linq;
using net.vieapps.Components.Utility;
#endregion
namespace net.vieapps.books.Components
{
public static class VinaBook
{
public static string ReferUri = "https://www.vinabook.com/";
public static string Filename = "vinabook.com";
#region Initialize bookself
public static BookSelf InitializeBookSelf(string folder)
{
if (!string.IsNullOrWhiteSpace(folder) && !Directory.Exists(folder))
Directory.CreateDirectory(folder);
string filePath = (string.IsNullOrWhiteSpace(folder) ? "crawls" : folder + "\\") + VinaBook.Filename + ".status.json";
JObject json = File.Exists(filePath)
? JObject.Parse(Utility.ReadTextFile(filePath))
: new JObject()
{
{ "TotalPages", 0 },
{ "CurrentPage", 0 },
{ "Category", 0 },
{ "LastActivity", DateTime.Now },
};
BookSelf bookself = new BookSelf();
bookself.TotalPages = Convert.ToInt32((json["TotalPages"] as JValue).Value);
bookself.CurrentPage = Convert.ToInt32((json["CurrentPage"] as JValue).Value);
bookself.CategoryIndex = Convert.ToInt32(json["Category"]);
if (bookself.TotalPages < 1)
bookself.CurrentPage = 0;
else if (bookself.CurrentPage >= bookself.TotalPages)
{
bookself.CategoryIndex++;
bookself.CurrentPage = 0;
bookself.TotalPages = 0;
}
bookself.CurrentPage++;
bookself.UrlPattern = bookself.CategoryIndex < Crawler.Categories.Count ? (Crawler.Categories[bookself.CategoryIndex]["URL"] as JValue).Value.ToString() + "{0}" : null;
bookself.UrlParameters = new List<string>();
bookself.UrlParameters.Add("page-" + bookself.CurrentPage + "/?sef_rewrite=1");
return bookself;
}
#endregion
#region Finalize bookself
public static void FinaIizeBookSelf(BookSelf bookself, string folder)
{
if (!string.IsNullOrWhiteSpace(folder) && !Directory.Exists(folder))
Directory.CreateDirectory(folder);
Crawler.SaveCrawledBooks(folder);
Crawler.SaveMissingBooks(folder);
string filePath = (string.IsNullOrWhiteSpace(folder) ? "" : folder + "\\") + VinaBook.Filename + ".status.json";
JObject json = File.Exists(filePath)
? JObject.Parse(Utility.ReadTextFile(filePath))
: new JObject()
{
{ "TotalPages", 0 },
{ "CurrentPage", 0 },
{ "Category", 0 },
{ "LastActivity", DateTime.Now },
};
if (bookself.TotalPages > 0)
json["TotalPages"] = bookself.TotalPages;
if (bookself.CurrentPage > 0)
json["CurrentPage"] = bookself.CurrentPage;
json["Category"] = bookself.CategoryIndex;
json["LastActivity"] = DateTime.Now;
Utility.WriteTextFile(filePath, json.ToString(Newtonsoft.Json.Formatting.Indented));
filePath = (string.IsNullOrWhiteSpace(folder) ? "" : folder + "\\") + VinaBook.Filename + ".json";
//Utility.WriteTextFile(filePath, bookself.Books.ToJArray().ToString(Newtonsoft.Json.Formatting.Indented));
List<string> books = new List<string>();
if (bookself.Books != null)
for (int index = 0; index < bookself.Books.Count; index++)
books.Add(bookself.Books[index].ToString(Newtonsoft.Json.Formatting.None));
Utility.WriteTextFile(filePath, books);
}
#endregion
#region Get bookself and get details of all books in the bookself
public static async Task<BookSelf> GetBookSelf(BookSelf bookself, string mediafilesFolder, int crawlMethod, CancellationToken cancellationToken, Action<string> onProcess, Action<BookSelf> onCompleted, Action<BookSelf, Exception> onError)
{
// get data
cancellationToken.ThrowIfCancellationRequested();
bookself.Url = bookself.UrlPattern;
if (bookself.UrlParameters.Count > 0)
for (int index = 0; index < bookself.UrlParameters.Count; index++)
bookself.Url = bookself.Url.Replace("{" + index + "}", bookself.UrlParameters[index]);
if (onProcess != null)
onProcess("Start to crawl data [" + bookself.Url + "]" + "\r\n");
string html = "";
try
{
html = await Utility.GetWebPageAsync(bookself.Url, VinaBook.ReferUri, Utility.DesktopUserAgent, cancellationToken);
//html = await Utility.GetWebPageAsync(bookself.Url, VinaBook.ReferUri, Utility.SpiderUserAgent, cancellationToken);
}
catch (Exception ex)
{
if (onError != null)
{
onError(bookself, ex);
return bookself;
}
else
throw ex;
}
cancellationToken.ThrowIfCancellationRequested();
int start = -1, end = -1;
// pages
if (bookself.TotalPages < 1)
{
start = html.PositionOf("<div class=\"pagination-bottom");
start = start < 0 ? -1 : html.PositionOf("<span", start + 1);
start = start < 0 ? -1 : html.PositionOf(">", start + 1);
end = start < 0 ? -1 : html.PositionOf("</span>", start + 1);
if (start > 0 && end > start)
{
string info = html.Substring(start + 1, end - start - 1).Replace(StringComparison.OrdinalIgnoreCase, "Trang", "").Trim();
if (info.Contains("/"))
bookself.TotalPages = Convert.ToInt32(info.Split('/')[1]);
else
bookself.TotalPages = 1;
}
else
bookself.TotalPages = 1;
}
// books
bookself.Books = new List<Book>();
start = html.PositionOf(" id=\"pagination_contents");
start = start < 0 ? -1 : html.PositionOf("<table", start + 1);
end = start < 0 ? -1 : html.PositionOf("</table>", start + 1);
html = start > 0 && end > start ? html.Substring(start, end - start) : "";
start = html.PositionOf("<p class=\"price-info-nd");
while (start > -1)
{
Book book = new Book();
start = html.PositionOf("<a", start + 1);
start = html.PositionOf("href=\"", start + 1) + 6;
end = html.PositionOf("\"", start + 1);
book.SourceUri = html.Substring(start, end - start).Trim() + "?sef_rewrite=1";
start = html.PositionOf(">", start + 1) + 1;
end = html.PositionOf("</a>", start + 1);
book.Title = html.Substring(start, end - start).Trim();
bool bypass = book.Title.StartsWith("combo", StringComparison.OrdinalIgnoreCase) || book.Title.StartsWith("boxset:", StringComparison.OrdinalIgnoreCase)
|| book.Title.StartsWith("hộp sách", StringComparison.OrdinalIgnoreCase) || book.Title.StartsWith("hộp", StringComparison.OrdinalIgnoreCase)
|| (book.Title.PositionOf("(tập") > 0 && book.Title.PositionOf("đến tập") > 0)
|| (book.Title.PositionOf("(tập") > 0 && book.Title.PositionOf("- tập") > 0);
if (!bypass)
{
int eposides = 1;
try
{
eposides = Crawler.GetPaperBookEposides(book.Title);
}
catch { }
book.ExtraData.Add(new JProperty("Eposides", eposides));
book.Title = Crawler.GetPaperBookTitle(book.Title);
bookself.Books.Add(book);
}
start = html.PositionOf("<p class=\"price-info-nd", start + 1);
}
if (onProcess != null)
onProcess("The listing of books is parsed, now start to crawl details of " + bookself.Books.Count + " books" + "\r\n");
// get details of all books and update final collection of the book
List<Book> finalBooks = new List<Book>();
string category = (Crawler.Categories[bookself.CategoryIndex]["Name"] as JValue).Value.ToString();
string tags = (Crawler.Categories[bookself.CategoryIndex]["Tags"] as JValue).Value.ToString();
Action<string, Exception> onDownloadError = (url, ex) =>
{
if (onProcess != null && !(ex is OperationCanceledException))
onProcess("\r\n" + "------ Error occurred while downlading file [" + url + "]" + "\r\n" + ex.Message + "\r\n" + "Stack: " + ex.StackTrace + "\r\n\r\n");
};
Func<int, Task> getDetails = async (index) =>
{
cancellationToken.ThrowIfCancellationRequested();
Book book = bookself.Books[index];
book.Category = category;
book.Tags = tags;
try
{
await Task.Delay(Utility.GetRandomNumber(234, 345), cancellationToken);
html = await Utility.GetWebPageAsync(book.SourceUri, bookself.Url, Utility.DesktopUserAgent, cancellationToken);
//html = await Utility.GetWebPageAsync(book.SourceUri, bookself.Url, Utility.SpiderUserAgent, cancellationToken);
cancellationToken.ThrowIfCancellationRequested();
// cover image
string coverImageUri = null;
start = html.PositionOf("<div class=\"bk-cover");
if (start < 0)
start = html.PositionOf("<div class=\"cm-image-wrap");
start = start < 0 ? -1 : html.PositionOf("<img", start + 1);
end = start < 0 ? -1 : html.PositionOf(">", start + 1);
if (start > 0 && end > start)
{
start = html.PositionOf("src=\"", start + 1) + 5;
end = html.PositionOf("\"", start + 1);
coverImageUri = start > 0 && end > start ? html.Substring(start, end - start).Replace("/240x/", "/800x/").Replace(" ", "%20").Replace("+", "%20") : "";
}
// price
start = html.PositionOf("<span id=\"sec_list_price");
start = start < 0 ? -1 : html.PositionOf(">", start + 1) + 1;
end = start < 0 ? -1 : html.PositionOf("</span>", start + 1);
if (start < 0 && end < 0)
{
start = html.PositionOf("<span id=\"sec_discounted_price");
start = start < 0 ? -1 : html.PositionOf(">", start + 1) + 1;
end = start < 0 ? -1 : html.PositionOf("</span>", start + 1);
}
string price = start > 0 && end > start ? html.Substring(start, end - start).Trim().Replace("₫", "").Replace(".", "") : "";
try
{
if (price.Length > 4)
price = price.Left(price.Length - 3) + "000";
book.ExtraData.Add(new JProperty("Price", Convert.ToDouble(string.IsNullOrWhiteSpace(price) ? "0" : price)));
}
catch
{
book.ExtraData.Add(new JProperty("Price", 0.0d));
}
// summary
start = html.PositionOf("<div class=\"full-description\"");
start = start < 0 ? -1 : html.PositionOf("<p", start + 1);
end = start < 0 ? -1 : html.PositionOf("</div>", start + 1);
string summary = Crawler.NormalizeSummary(start > 0 && end > start ? html.Substring(start, end - start).Trim() : "");
// features
start = html.PositionOf("<div class=\"product-feature");
start = start < 0 ? -1 : html.PositionOf("<ul", start + 1);
end = start < 0 ? -1 : html.PositionOf("</ul>", start + 1);
start = start < 0 ? -1 : html.PositionOf(">", start + 1) + 1;
html = start > -1 && end > 0 ? html.Substring(start, end - start).Trim() : "";
start = html.PositionOf("<li");
while (start > -1)
{
start = html.PositionOf(">", start + 1) + 1;
end = start < 0 ? -1 : html.PositionOf("</li>", start + 1);
string info = start > -1 && end > 0 ? html.Substring(start, end - start).Trim() : "";
html = end > 0 ? html.Remove(0, end < html.Length - 5 ? end + 5 : html.Length).Trim() : "";
start = info.PositionOf(">") + 1;
end = info.PositionOf("<", start + 1);
string title = info.Substring(start, end - start).Trim();
end = info.PositionOf(">", end + 1) + 1;
info = info.Remove(0, end).Trim();
info = Utility.RemoveTag(info, "br");
info = info.Replace(StringComparison.OrdinalIgnoreCase, ",", "<br/>");
info = Utility.RemoveTag(info, "span");
info = Utility.RemoveTag(info, "a");
info = Utility.RemoveTag(info, "meta");
info = info.Trim();
start = info.PositionOf("<");
end = info.PositionOf(">", start + 1);
while (start > 0 && end > start && end < info.Length)
{
info = info.Substring(0, start).Trim() + " - " + info.Substring(end + 1).Trim();
start = info.PositionOf("<");
end = info.PositionOf(">", start + 1);
}
info = info.Trim();
if (title.StartsWith("Tác giả", StringComparison.OrdinalIgnoreCase))
book.Author = info.GetNormalized();
else if (title.StartsWith("Người dịch", StringComparison.OrdinalIgnoreCase))
book.Translator = info.GetNormalized();
else if (title.StartsWith("Nhà xuất bản", StringComparison.OrdinalIgnoreCase))
book.Publisher = info.Replace(StringComparison.OrdinalIgnoreCase, "NXB", "").Replace(StringComparison.OrdinalIgnoreCase, "Nhà Xuất Bản", "").Trim().GetNormalized();
else if (title.StartsWith("Nhà phát hành", StringComparison.OrdinalIgnoreCase))
book.Producer = info.GetNormalized();
else if (title.StartsWith("Khối lượng", StringComparison.OrdinalIgnoreCase))
try
{
book.ExtraData.Add(new JProperty("Weight", Convert.ToInt32(info.Replace(".00", "").Replace(StringComparison.OrdinalIgnoreCase, "gam", ""))));
}
catch
{
if (book.ExtraData["Weight"] == null)
book.ExtraData.Add(new JProperty("Weight", 0));
}
else if (title.StartsWith("Định dạng", StringComparison.OrdinalIgnoreCase))
book.ExtraData.Add(new JProperty("CoverType", info.GetNormalized()));
else if (title.StartsWith("Kích thước", StringComparison.OrdinalIgnoreCase))
book.ExtraData.Add(new JProperty("Dimenssions", info));
else if (title.StartsWith("Ngày phát hành", StringComparison.OrdinalIgnoreCase))
book.ExtraData.Add(new JProperty("PublishedDate", info));
else if (title.StartsWith("Số trang", StringComparison.OrdinalIgnoreCase))
try
{
book.ExtraData.Add(new JProperty("Pages", Convert.ToInt32(info)));
}
catch
{
if (book.ExtraData["Pages"] == null)
book.ExtraData.Add(new JProperty("Pages", 0));
}
start = html.PositionOf("<li");
}
// check empty attributes
if (book.ExtraData["CoverType"] == null)
{
string coverType = book.Title.IsContains("bìa mềm")
? "Bìa Mềm"
: book.Title.IsContains("bìa cứng")
? "Bìa Cứng"
: html.IsContains("Bìa Mềm") ? "Bìa Mềm" : "";
book.ExtraData.Add(new JProperty("CoverType", coverType));
}
if (book.ExtraData["Weight"] == null)
book.ExtraData.Add(new JProperty("Weight", 0));
if (book.ExtraData["Pages"] == null)
book.ExtraData.Add(new JProperty("Pages", 0));
// add summary at the last element
book.ExtraData.Add(new JProperty("Summary", summary));
// re-normalize title
if (book.Title.EndsWith("(" + book.Author + ")"))
book.Title = book.Title.Left(book.Title.Length - 2 - book.Author.Length).Trim();
if (book.Title.EndsWith("()"))
book.Title = book.Title.Left(book.Title.Length - 2).Trim();
// check
cancellationToken.ThrowIfCancellationRequested();
book.PermanentID = book.ID = Book.GenerateID(book.Title, book.Author, book.Translator);
// add into final collection
int eposides = Convert.ToInt32(book.ExtraData["Eposides"]);
if (eposides > 1)
{
// download cover image
string coverFilePath = "";
if (!string.IsNullOrWhiteSpace(coverImageUri))
{
await Utils.DownloadFileAsync(coverImageUri, book.SourceUri, mediafilesFolder, book.ID, cancellationToken, null, onDownloadError);
book.Cover = Utils.MediaUri + Utils.GetFilename(coverImageUri);
coverFilePath = book.Cover.Replace(Utils.MediaUri, mediafilesFolder + "\\" + book.ID + "-");
}
if (!string.IsNullOrWhiteSpace(coverFilePath) && !File.Exists(coverFilePath))
{
book.Cover = "";
coverFilePath = "";
}
book.Title = Crawler.GetPaperBookTitle(book.Title, eposides);
price = book.ExtraData["Price"] == null ? "0" : (Convert.ToDouble((book.ExtraData["Price"] as JValue).Value) / eposides).ToString("######000");
if (price.Length > 4)
price = price.Left(price.Length - 3) + "000";
double finalPrice = Convert.ToDouble(price);
int finalWeight = book.ExtraData["Weight"] == null ? 0 : Convert.ToInt32((book.ExtraData["Weight"] as JValue).Value) / eposides;
int finalPages = book.ExtraData["Pages"] == null ? 0 : Convert.ToInt32((book.ExtraData["Pages"] as JValue).Value) / eposides;
for (int idx = 1; idx <= eposides; idx++)
{
// prepare object
Book theBook = book.Clone();
theBook.Title = (theBook.Title + Crawler.GetPaperBookEposides(idx, eposides)).Replace(") (", " - ");
theBook.PermanentID = theBook.ID = Book.GenerateID(theBook.Title, theBook.Author, theBook.Translator);
theBook.ExtraData = book.ExtraData;
theBook.ExtraData.Remove("Eposides");
theBook.ExtraData["Price"] = finalPrice;
theBook.ExtraData["Weight"] = finalWeight;
theBook.ExtraData["Pages"] = finalPages;
// check and update into collection
if (!Crawler.CrawledBooks.Contains(theBook.ID))
{
if (!string.IsNullOrWhiteSpace(coverFilePath))
{
theBook.Cover = Utils.MediaUri + Utils.GetFilename(book.Cover.Replace(Utils.MediaUri, Utility.GetUUID() + "-"));
File.Copy(coverFilePath, theBook.Cover.Replace(Utils.MediaUri, mediafilesFolder + "\\" + theBook.ID + "-"));
}
finalBooks.Add(theBook);
Crawler.CrawledBooks.Add(theBook.ID);
if (onProcess != null)
onProcess("The book is completed [" + theBook.Name + " : " + theBook.SourceUri + "]");
}
else if (onProcess != null)
onProcess("The book is BY-PASS [" + theBook.Name + "]");
}
// delete old cover image
if (!string.IsNullOrWhiteSpace(coverFilePath))
File.Delete(coverFilePath);
}
else
{
if (!Crawler.CrawledBooks.Contains(book.ID))
{
// download cover image
if (!string.IsNullOrWhiteSpace(coverImageUri))
{
await Utils.DownloadFileAsync(coverImageUri, book.SourceUri, mediafilesFolder, book.ID, cancellationToken, null, onDownloadError);
book.Cover = Utils.MediaUri + Utils.GetFilename(coverImageUri);
}
// update into collections
book.ExtraData.Remove("Eposides");
Crawler.CrawledBooks.Add(book.ID);
finalBooks.Add(book);
if (onProcess != null)
onProcess("The book is completed [" + book.Name + " : " + book.SourceUri + "]");
}
else if (onProcess != null)
onProcess("The book is BY-PASS [" + book.Name + "]");
}
}
catch (Exception ex)
{
if (!Crawler.MissingBooks.ContainsKey(book.ID))
Crawler.MissingBooks.Add(book.ID, book.SourceUri + "|" + book.Title);
if (onProcess != null && !(ex is OperationCanceledException))
{
string msg = "\r\n" + "--- Error occurred while crawling details of book [" + book.Name + " : " + book.SourceUri + "]"
+ "\r\n" + "[" + ex.GetType().ToString() + "]: " + ex.Message + "\r\n"
+ "\r\n" + "Stack: " + ex.StackTrace + "\r\n\r\n";
onProcess(msg);
}
}
};
Func<Task> fastCrawl = async () =>
{
List<Task> tasks = new List<Task>();
for (int index = 0; index < bookself.Books.Count; index++)
tasks.Add(getDetails(index));
await Task.WhenAll(tasks);
};
Func<Task> slowCrawl = async () =>
{
int index = 0;
while (index < bookself.Books.Count)
{
cancellationToken.ThrowIfCancellationRequested();
await getDetails(index);
index++;
}
};
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();
// update collection of books
cancellationToken.ThrowIfCancellationRequested();
bookself.Books = finalBooks;
// callback on complete
if (onCompleted != null)
onCompleted(bookself);
return bookself;
}
#endregion
}
}