public static void Sign(string input, string output, ImageData stamper, ICipherParameters privateKey, X509Certificate[] chain, string flag)
{
PdfDocument document = new PdfDocument(new PdfReader(input));
PdfAcroForm acroForm = PdfAcroForm.GetAcroForm(document, false);
bool append = (acroForm != null && acroForm.GetSignatureFlags() != 0);
int pageNumber = document.GetNumberOfPages();
RegexBasedLocationExtractionStrategy strategy = new RegexBasedLocationExtractionStrategy(flag);
PdfDocumentContentParser parser = new PdfDocumentContentParser(document);
parser.ProcessContent(pageNumber, strategy);
var locations = new List <IPdfTextLocation>(strategy.GetResultantLocations());
document.Close();
StampingProperties properties = new StampingProperties();
properties = append ? properties.UseAppendMode() : properties;
PdfSigner signer = new PdfSigner(new PdfReader(input), new FileStream(output, FileMode.Create), properties);
signer.SetCertificationLevel(PdfSigner.CERTIFIED_NO_CHANGES_ALLOWED);
PdfSignatureAppearance appearance = signer.GetSignatureAppearance();
appearance.SetPageNumber(pageNumber);
int size = locations.Count;
if (size != 0)
{
IPdfTextLocation location = locations[size - 1];
float flagX = location.GetRectangle().GetX();
float flagY = location.GetRectangle().GetY();
float width = stamper.GetWidth();
float height = stamper.GetHeight();
float x = flagX - width / 2;
float y = flagY - height / 2;
appearance.SetRenderingMode(PdfSignatureAppearance.RenderingMode.GRAPHIC);
appearance.SetSignatureGraphic(stamper);
appearance.SetPageRect(new Rectangle(x, y, width, height));
}
PrivateKeySignature signature = new PrivateKeySignature(privateKey, DigestAlgorithms.SHA256);
signer.SignDetached(signature, chain, null, null, null, 0, PdfSigner.CryptoStandard.CADES);
}
static void Main(string[] args)
{
WebClient client = new WebClient();
List <String> linkS = new List <String>();
//List<String> linkS1 = new List<String>();
List <String> linkS2 = new List <String>();
ICollection <IPdfTextLocation> textLocations = new List <IPdfTextLocation>();
PdfReader pdfReader = new PdfReader(@"C:\Users\ocan4214\Desktop\SpringerEbooks.pdf");
PdfDocument pdfdoc = new PdfDocument(pdfReader);
Console.WriteLine("page number = " + pdfdoc.GetNumberOfPages());
RegexBasedLocationExtractionStrategy regexStrat = new RegexBasedLocationExtractionStrategy(@"((http|ftp|https):\/\/[\w\-_]+(\.[\w\-_]+)+([\w\-\.,@?^=%&:/~\+#]*[\w\-\@?^=%&/~\+#])?)");
//PdfCanvasProcessor canvasProcessor = new PdfCanvasProcessor(regexStrat);
LocationTextExtractionStrategy strat = new LocationTextExtractionStrategy();
PdfCanvasProcessor canvasProcessor = new PdfCanvasProcessor(strat);
StringBuilder text = new StringBuilder();
for (int i = 1; i <= pdfdoc.GetNumberOfPages(); i++)
{
ITextExtractionStrategy strategy = new SimpleTextExtractionStrategy();
string currentText = PdfTextExtractor.GetTextFromPage(pdfdoc.GetPage(i), strategy);
currentText = Encoding.UTF8.GetString(ASCIIEncoding.Convert(Encoding.Default, Encoding.UTF8, Encoding.Default.GetBytes(currentText)));
text.Append(currentText);
/*
* canvasProcessor.ProcessPageContent(pdfdoc.GetPage(i));
* canvasProcessor.Reset();
* foreach (var m in regexStrat.GetResultantLocations())
* {
* textLocations.Add(m);
* }
*/
}
var linkParser = new Regex(@"\b(?:https?://|www\.)\S+\b", RegexOptions.Compiled | RegexOptions.IgnoreCase);
foreach (Match m in linkParser.Matches(text.ToString()))
{
linkS.Add(m.ToString());
}
/* foreach(var l in linkS)
* {
* var st = l.Replace(@"http://link.springer.com/openurl?genre=book&isbn=978-", "https://link.springer.com/content/pdf/10.1007%2F978-");
* st += ".pdf";
* linkS1.Add(st);
* }*/
int j = 0;
foreach (var link in linkS)
{
HtmlWeb web = new HtmlWeb();
HtmlAgilityPack.HtmlDocument doc = new HtmlAgilityPack.HtmlDocument();
doc = web.Load(link);
var node = doc.DocumentNode.SelectSingleNode("//a[@title='Download this book in PDF format']");
var titlenode = doc.DocumentNode.SelectSingleNode("//h1");
if (node != null && titlenode != null)
{
HtmlAttribute href = node.Attributes["href"];
if (href != null)
{
Console.WriteLine("https://link.springer.com/" + href.Value + " title = " + titlenode.InnerText);
var titlesafe = titlenode.InnerText;
if (titlesafe.IndexOfAny(System.IO.Path.GetInvalidFileNameChars()) >= 0)
{
titlesafe = "Change the Name of this " + j;
}
linkS2.Add(@"https://link.springer.com/" + href.Value);
client.DownloadFile(new Uri("https://link.springer.com/" + href.Value), System.IO.Path.Combine(@"C:\Users\ocan4214\Desktop\pdfler\TEST", titlesafe + ".pdf"));
j++;
}
}
}
/*
* foreach (var m in textLocations)
* {
* Console.WriteLine("Link is "+ m.GetText());
* }
*/
// https://link.springer.com/book/10.1007%2F978-3-319-18398-5 Phyton for ARCGIS Book link
// https://link.springer.com/content/pdf/10.1007%2F978-3-319-18398-5.pdf PDF link
// http://link.springer.com/openurl?genre=book&isbn=978-3-319-18398-5 our link
// https://link.springer.com/book/10.1007%2F978-1-4899-7550-8 The finite element method Book link
// https://link.springer.com/content/pdf/10.1007%2F978-1-4899-7550-8.pdf PDF link
// http://link.springer.com/openurl?genre=book&isbn=978-1-4899-7550-8
var a = 5;
}