DocumentMimeTypeSource Enumeration

Summary

Source of a MIME type callback invocation.

Syntax

C++/CLI

Python

[SerializableAttribute()] 
[DataContractAttribute()] 
public enum DocumentMimeTypeSource

public: 
   [SerializableAttribute,  
   DataContractAttribute] 
   enum class DocumentMimeTypeSource sealed

class DocumentMimeTypeSource(Enum): 
   User = 0 
   Cache = 1 
   Url = 2 
   Data = 3

Members

Value	Member	Description
0	User	The mime type is passed by the user. For instance, in LoadDocumentOptions.MimeType.
1	Cache	The mime type is stored in the cache, for example, from BeginUploadDocumentOptions.MimeType.
2	Url	The mime type was obtained from the HTTP headers of a URL as set by the server containing the document.
3	Data	The mime type is read by LEADTOOLS RasterCodecs from the actual image data.

Remarks

Refer to DocumentMimeTypes for more information.

Example

Java

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.Document.Writer; 
 
using Leadtools.Document; 
using Leadtools.Caching; 
using Leadtools.Annotations.Engine; 
using Leadtools.Ocr; 
using Leadtools.Barcode; 
using Leadtools.Document.Converter; 
 
public void MimeTypesWhitelistExample() 
{ 
   // Documents to try and load 
   string[] urls = 
   { 
      "https://demo.leadtools.com/images/pdf/leadtools.pdf", 
      "https://demo.leadtools.com/images/tiff/ocr.tif", 
      "https://demo.leadtools.com/images/png/pngimage.png" 
    }; 
 
   // Setup a callback for logging 
   // DocumentMimeTypes & DocumentMimeTypes.UserGetDocumentStatusHandler reference 
   DocumentMimeTypes.UserGetDocumentStatusHandler userGetDocumentStatus = (Uri uri, LoadDocumentOptions options, DocumentMimeTypeSource source, string mimeType) => 
   { 
      // Use default operation 
      DocumentMimeTypeStatus status = DocumentFactory.MimeTypes.GetDocumentStatus(uri, options, source, mimeType); 
      string mimeTypeValue = mimeType != null ? mimeType : "[null]"; 
      DocumentFactory.MimeTypes.GetStatus(mimeTypeValue); 
      Console.WriteLine(string.Format("  ** Whitelist url:{0} source:{1} mimeType:{2} status:{3}", uri.ToString(), source, mimeTypeValue, status)); 
 
      return status; 
   }; 
 
   DocumentFactory.MimeTypes.UserGetDocumentStatus = userGetDocumentStatus; 
 
   // Load the documents, by default we should load all of them 
   Console.WriteLine("Everything should load OK"); 
   LoadDocuments(urls); 
 
   // Now, disable loading everything except PDF and TIFF and try again 
   Console.WriteLine("Disabling everything except PDF and TIFF"); 
   DocumentFactory.MimeTypes.DefaultStatus = DocumentMimeTypeStatus.Denied; 
   DocumentFactory.MimeTypes.Entries.Add("application/pdf", DocumentMimeTypeStatus.Allowed); 
   DocumentFactory.MimeTypes.Entries.Add("image/tiff", DocumentMimeTypeStatus.Allowed); 
   Console.WriteLine("Only PDF and TIFF should be loaeded"); 
   LoadDocuments(urls); 
 
   // Reset 
   DocumentFactory.MimeTypes.UserGetDocumentStatus = null; 
} 
 
private static void LoadDocuments(string[] urls) 
{ 
   var loadDocumentOptions = new LoadDocumentOptions(); 
 
   foreach (var url in urls) 
   { 
      Console.WriteLine(" Loading " + url); 
      using (var document = DocumentFactory.LoadFromUri(new Uri(url), loadDocumentOptions)) 
      { 
         if (document != null) 
            Console.WriteLine("  is Loaded"); 
         else 
            Console.WriteLine("  cannot be loaded"); 
      } 
   } 
}

 
import java.io.File; 
import java.io.FileOutputStream; 
import java.io.IOException; 
import java.net.MalformedURLException; 
import java.net.URI; 
import java.net.URISyntaxException; 
import java.net.URL; 
import java.nio.file.Files; 
import java.nio.file.Paths; 
import java.util.ArrayList; 
import java.util.Calendar; 
import java.util.List; 
import java.util.concurrent.Callable; 
import java.util.concurrent.ExecutorService; 
import java.util.concurrent.Executors; 
import java.util.concurrent.Future; 
import java.util.regex.Pattern; 
 
import org.junit.*; 
import org.junit.runner.JUnitCore; 
import org.junit.runner.Result; 
import org.junit.runner.notification.Failure; 
import static org.junit.Assert.*; 
 
import leadtools.*; 
import leadtools.annotations.engine.*; 
import leadtools.barcode.*; 
import leadtools.caching.*; 
import leadtools.codecs.*; 
import leadtools.document.*; 
import leadtools.document.DocumentMimeTypes.UserGetDocumentStatusHandler; 
import leadtools.document.converter.*; 
import leadtools.document.writer.*; 
import leadtools.ocr.*; 
 
 
public void documentMimeTypesExample() throws URISyntaxException { 
   // Documents to try and load 
   String[] urls = { 
         "https://demo.leadtools.com/images/pdf/leadtools.pdf", 
         "https://demo.leadtools.com/images/tiff/ocr.tif", 
         "https://demo.leadtools.com/images/png/pngimage.png" 
   }; 
 
   // Setup a callback for logging 
   // DocumentMimeTypes & DocumentMimeTypes.UserGetDocumentStatusHandler reference 
   UserGetDocumentStatusHandler userGetDocumentStatus = new UserGetDocumentStatusHandler() { 
 
      @Override 
      public DocumentMimeTypeStatus userGetDocumentStatus(URI uri, LoadDocumentOptions options, 
            DocumentMimeTypeSource source, String mimeType) { 
         // Use default operation 
         DocumentMimeTypeStatus status = DocumentFactory.getMimeTypes().getDocumentStatus(uri, options, source, 
               mimeType); 
         String mimeTypeValue = mimeType != null ? mimeType : "[null]"; 
         DocumentFactory.getMimeTypes().getStatus(mimeTypeValue); 
         System.out.println(String.format("  ** Whitelist url:%s source:%s mimeType:%s status:%s%n", uri.toString(), 
               source, mimeTypeValue, status)); 
 
         return status; 
      } 
 
   }; 
 
   DocumentFactory.getMimeTypes().setUserGetDocumentStatus(userGetDocumentStatus); 
 
   // Load the documents, by default we should load all of them 
   System.out.println("Everything should load OK"); 
   loadDocuments(urls); 
 
   // Now, disable loading everything except PDF and TIFF and try again 
   System.out.println("Disabling everything except PDF and TIFF"); 
   DocumentFactory.getMimeTypes().setDefaultStatus(DocumentMimeTypeStatus.DENIED); 
   DocumentFactory.getMimeTypes().getEntries().put("application/pdf", DocumentMimeTypeStatus.ALLOWED); 
   DocumentFactory.getMimeTypes().getEntries().put("image/tiff", DocumentMimeTypeStatus.ALLOWED); 
   System.out.println("Only PDF and TIFF should be loaded"); 
   loadDocuments(urls); 
 
   // Reset 
   DocumentFactory.getMimeTypes().setUserGetDocumentStatus(null); 
 
} 
 
private void loadDocuments(String[] urls) throws URISyntaxException { 
   LoadDocumentOptions loadDocumentOptions = new LoadDocumentOptions(); 
   for (String url : urls) { 
      System.out.println(" Loading " + url); 
      LEADDocument document = DocumentFactory.loadFromUri(new URI(url), loadDocumentOptions); 
      if (document != null) 
         System.out.println("  is Loaded"); 
      else 
         System.out.println("  cannot be loaded"); 
   } 
}

Requirements

Target Platforms

Reference

Leadtools.Document Namespace

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