Examples of org.apache.tika.detect.Detector.detect()

org.apache.tika.detect.Detector.detect()
Detects the content type of the given input document. Returns application/octet-stream if the type of the document can not be detected.
If the document input stream is not available, then the first argument may be null. Otherwise the detector may read bytes from the start of the stream to help in type detection. The given stream is guaranteed to support the {@link InputStream#markSupported() mark feature} and the detectoris expected to {@link InputStream#mark(int) mark} the stream beforereading any bytes from it, and to {@link InputStream#reset() reset}the stream before returning. The stream must not be closed by the detector.
The given input metadata is only read, not modified, by the detector. @param input document input stream, or null @param metadata input metadata for the document @return detected media type, or application/octet-stream @throws IOException if the document input stream could not be read

          String ct = metadata.get(org.apache.tika.metadata.HttpHeaders.CONTENT_TYPE);


          if (ct!=null) {
            return MediaType.parse(ct);
          } else {
            return detector.detect(inputStream, metadata);
          }
        }
      });
    }
  }

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      TikaInputStream stream = getTestFile(file);
      Detector detector = new DefaultDetector();
      try {
         assertEquals(
                 MediaType.application("vnd.ms-tnef"),
                 detector.detect(stream, new Metadata()));
     } finally {
         stream.close();
     }
   }

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       m.add(Metadata.RESOURCE_NAME_KEY, "excel.xlsb");
       
       // Should be detected correctly
       MediaType type = null;
       try {
          type = detector.detect(input, m);
          assertEquals("application/vnd.ms-excel.sheet.binary.macroenabled.12", type.toString());
       } finally {
          input.close();
       }

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       m.add(Metadata.RESOURCE_NAME_KEY, "excel_95.xls");
       
       // Should be detected correctly
       MediaType type = null;
       try {
          type = detector.detect(input, m);
          assertEquals("application/vnd.ms-excel", type.toString());
       } finally {
          input.close();
       }

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          String ct = metadata.get(org.apache.tika.metadata.HttpHeaders.CONTENT_TYPE);


          if (ct!=null) {
            return MediaType.parse(ct);
          } else {
            return detector.detect(inputStream, metadata);
          }
        }
      });
    }
  }

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              .get(org.apache.tika.metadata.HttpHeaders.CONTENT_TYPE);
          logger.info("Content type " + ct);
          if (ct != null) {
            return org.apache.tika.mime.MediaType.parse(ct);
          } else {
            return detector.detect(inputStream, metadata);
          }
        }
      });
    }
  }

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       m.add(Metadata.RESOURCE_NAME_KEY, "excel.xlsb");
       
       // Should be detected correctly
       MediaType type = null;
       try {
          type = detector.detect(input, m);
          assertEquals("application/vnd.ms-excel.sheet.binary.macroenabled.12", type.toString());
       } finally {
          input.close();
       }

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        try {
            final Detector detector = new DefaultDetector();
            final Metadata metadata = new Metadata();
            metadata.set(Metadata.RESOURCE_NAME_KEY, fileName);
            
            final MediaType type = detector.detect(tikaInputStreamStream, metadata);
            logger.debug("Determined '{}' for '{}'", type, fileName);
            return type;
        }
        catch (IOException e) {
            logger.warn("Failed to determine media type for '" + fileName + "' assuming XML", e);

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          String ct = metadata.get(org.apache.tika.metadata.HttpHeaders.CONTENT_TYPE);


          if (ct!=null) {
            return MediaType.parse(ct);
          } else {
            return detector.detect(inputStream, metadata);
          }
        }
      });
    }
  }

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      TikaInputStream stream = getTestFile(file);
      Detector detector = new DefaultDetector();
      try {
         assertEquals(
                 MediaType.application("vnd.ms-tnef"),
                 detector.detect(stream, new Metadata()));
     } finally {
         stream.close();
     }
   }

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