Examples of org.apache.james.mime4j.parser.MimeStreamParser

org.apache.james.mime4j.parser.MimeStreamParser
Parses MIME (or RFC822) message streams of bytes or characters and reports parsing events to a ContentHandler instance.

Typical usage:
```
 ContentHandler handler = new MyHandler(); MimeStreamParser parser = new MimeStreamParser(); parser.setContentHandler(handler); parser.parse(new FileInputStream("mime.msg")); 
```
@version $Id: MimeStreamParser.java,v 1.8 2005/02/11 10:12:02 ntherning Exp $

        
        assertEquals(0, expected.size());
    }
    
    public void testAutomaticContentDecoding() throws Exception {
        MimeStreamParser parser = new MimeStreamParser();
        parser.setContentDecoding(true);
        TestHandler handler = new TestHandler();
        parser.setContentHandler(handler);


        String msg = "Subject: Yada yada\r\n"
                   + "From: foo@bar.com\r\n"
                   + "Content-Type: application/octet-stream\r\n"
                   + "Content-Transfer-Encoding: base64\r\n"
                   + "\r\n"
                   + "V2hvIGF0ZSBteSBjYWtlPwo=";
        String expected = "<message>\r\n"
                        + "<header>\r\n"
                        + "<field>\r\n"
                        + "Subject: Yada yada"
                        + "</field>\r\n"
                        + "<field>\r\n"
                        + "From: foo@bar.com"
                        + "</field>\r\n"
                        + "<field>\r\n"
                        + "Content-Type: application/octet-stream"
                        + "</field>\r\n"
                        + "<field>\r\n"
                        + "Content-Transfer-Encoding: base64"
                        + "</field>\r\n"
                        + "</header>\r\n"
                        + "<body>\r\n"
                        + "Who ate my cake?\n"
                        + "</body>\r\n"
                        + "</message>\r\n";
        
        parser.parse(new ByteArrayInputStream(msg.getBytes()));
        String result = handler.sb.toString();
        
        assertEquals(expected, result);
    }

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        BasicConfigurator.configure();
    }
   
    @Override
    protected void runTest() throws Throwable {
        MimeStreamParser parser = null;
        TestHandler handler = null;
        MimeEntityConfig config = new MimeEntityConfig();
        config.setMaxLineLen(-1);
        parser = new MimeStreamParser(config);
        handler = new TestHandler();
        
        System.out.println("Parsing " + file.getName());
        parser.setContentHandler(handler);
        parser.parse(new FileInputStream(file));
        
        String result = handler.sb.toString();
        String xmlFile = file.getAbsolutePath().substring(0, file.getAbsolutePath().lastIndexOf('.')) + ".xml";
        String xmlFileMime4j = file.getAbsolutePath().substring(0, file.getAbsolutePath().lastIndexOf('.')) + ".mime4j.xml";

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   private static class BinaryMessage extends Message
   {
      private BinaryMessage(InputStream is) throws IOException, MimeIOException
      {
         try {
            MimeStreamParser parser = new MimeStreamParser(null);
            parser.setContentHandler(new BinaryOnlyMessageBuilder(this, DefaultStorageProvider.getInstance()));
            parser.parse(is);
         } catch (MimeException e) {
            throw new MimeIOException(e);
         }


      }

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                }
            }
        };
        
        MimeStreamParser parser = new MimeStreamParser();
        parser.setContentHandler(handler);
        try {
            // parse the message to index headers and body
            parser.parse(membership.getFullContent());
        } catch (MimeException e) {
            // This should never happen as it was parsed before too without problems.            
            throw new MailboxException("Unable to index content of message", e);
        } catch (IOException e) {
            // This should never happen as it was parsed before too without problems.

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        MimeConfig config = new MimeConfig();
        config.setMaxLineLen(100000);
        config.setMaxHeaderLen(100000); // max length of any individual header
        config = context.get(MimeConfig.class, config);


        MimeStreamParser parser = new MimeStreamParser(config);
        XHTMLContentHandler xhtml = new XHTMLContentHandler(handler, metadata);


        MailContentHandler mch = new MailContentHandler(
                xhtml, metadata, config.isStrictParsing());
        parser.setContentHandler(mch);
        parser.setContentDecoding(true);
        TaggedInputStream tagged = TaggedInputStream.get(stream);
        try {
            parser.parse(tagged);
        } catch (IOException e) {
            tagged.throwIfCauseOf(e);
            throw new TikaException("Failed to parse an email message", e);
        } catch (MimeException e) {
            // Unwrap the exception in case it was not thrown by mime4j

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        };
        MimeConfig config = new MimeConfig();
        config.setMaxLineLen(-1);
        //config.setStrictParsing(false);
        config.setMaxContentLen(-1);
        MimeStreamParser parser = new MimeStreamParser(config);
        parser.setContentDecoding(true);
        parser.setContentHandler(handler);
       
        try {
            // parse the message to index headers and body
            parser.parse(membership.getFullContent());
        } catch (MimeException e) {
            // This should never happen as it was parsed before too without problems.            
            throw new MailboxException("Unable to index content of message", e);
        } catch (IOException e) {
            // This should never happen as it was parsed before too without problems.

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        MimeConfig config = new MimeConfig();
        config.setMaxLineLen(100000);
        config.setMaxHeaderLen(100000); // max length of any individual header
        config = context.get(MimeConfig.class, config);


        MimeStreamParser parser = new MimeStreamParser(config);
        XHTMLContentHandler xhtml = new XHTMLContentHandler(handler, metadata);


        MailContentHandler mch = new MailContentHandler(
                xhtml, metadata, context, config.isStrictParsing());
        parser.setContentHandler(mch);
        parser.setContentDecoding(true);
        TaggedInputStream tagged = TaggedInputStream.get(stream);
        try {
            parser.parse(tagged);
        } catch (IOException e) {
            tagged.throwIfCauseOf(e);
            throw new TikaException("Failed to parse an email message", e);
        } catch (MimeException e) {
            // Unwrap the exception in case it was not thrown by mime4j

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    }


    public void parse(InputStream stream, ContentHandler handler,
            Metadata metadata, ParseContext context) throws IOException,
            SAXException, TikaException {
        MimeStreamParser parser = new MimeStreamParser();
        XHTMLContentHandler xhtml = new XHTMLContentHandler(handler, metadata);


        MailContentHandler mch = new MailContentHandler(xhtml, metadata);
        parser.setContentHandler(mch);
        parser.setContentDecoding(true);
        try {
            parser.parse(stream);
        } catch (MimeException e) {
            throw new TikaException(e.getMessage());
        }
    }

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        final DecodeMonitor mon = monitor != null ? monitor :
            strict ? DecodeMonitor.STRICT : DecodeMonitor.SILENT;
        final FieldParser<? extends ParsedField> fp = fieldParser != null ? fieldParser :
            strict ? DefaultFieldParser.getParser() : LenientFieldParser.getParser();
        final HeaderImpl header = new HeaderImpl();
        final MimeStreamParser parser = new MimeStreamParser(cfg, mon, null);
        parser.setContentHandler(new AbstractContentHandler() {
            @Override
            public void endHeader() {
                parser.stop();
            }
            @Override
            public void field(Field field) throws MimeException {
                ParsedField parsedField;
                if (field instanceof ParsedField) {
                    parsedField = (ParsedField) field;
                } else {
                    parsedField = fp.parse(field, mon);
                }
                header.addField(parsedField);
            }
        });
        try {
            parser.parse(is);
        } catch (MimeException ex) {
            throw new MimeIOException(ex);
        }
        return header;
    }

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                strict ? DecodeMonitor.STRICT : DecodeMonitor.SILENT;
            BodyDescriptorBuilder bdb = bodyDescBuilder != null ? bodyDescBuilder :
                new DefaultBodyDescriptorBuilder(null, fieldParser != null ? fieldParser :
                    strict ? DefaultFieldParser.getParser() : LenientFieldParser.getParser(), mon);
            BodyFactory bf = bodyFactory != null ? bodyFactory : new BasicBodyFactory();
            MimeStreamParser parser = new MimeStreamParser(cfg, mon, bdb);
            // EntityBuilder expect the parser will send ParserFields for the well known fields
            // It will throw exceptions, otherwise.
            parser.setContentHandler(new EntityBuilder(message, bf));
            parser.setContentDecoding(contentDecoding);
            if (flatMode) {
                parser.setFlat();
            } else {
                parser.setRecurse();
            }
            parser.parse(is);
            return message;
        } catch (MimeException e) {
            throw new MimeIOException(e);
        }
    }

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