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Java Source Code / Java Documentation » Web Crawler » heritrix » org.archive.io.arc

Source Cross Reference

Class Diagram

Java Document (Java Doc)

org.archive.io.arc .ARCConstants

All known Subclasses:   org.archive.io.arc .ARCWriter,  org.archive.io.arc .ARCReaderFactory,  org.archive.io.arc .ARCWriterTest,  org.archive.io.arc .ARCReader,  org.archive.io.arc .ARCRecordMetaData,  org.archive.crawler.writer .ARCWriterProcessor,  org.archive.io.arc .ARCRecord,  org.archive.io.arc .ARCUtils,
ARCConstants
public interface ARCConstants extends ArchiveFileConstants(Code)
Constants used by ARC files and in ARC file processing.
author:
   stack

Field Summary
final public static String ARC_FILE_EXTENSION
     ARC file extention.
final public static byte[] ARC_GZIP_EXTRA_FIELD
     The FLG.FEXTRA field that is added to ARC files.
final public static String ARC_MAGIC_NUMBER
     ARC file *MAGIC NUMBER*.
final public static String CHECKSUM_FIELD_KEY
     Key for checksum field.
final public static String CHECKSUM_HEADER_FIELD_KEY
     Key for the ARC Header Checksum field.
final public static String CODE_HEADER_FIELD_KEY
     Key for the ARC Header Result Code field.
final public static String COMPRESSED_ARC_FILE_EXTENSION
     Compressed arc file extension.
final public static String DEFAULT_ENCODING
     Encoding to use getting bytes from strings. Specify an encoding rather than leave it to chance: i.e whatever the JVMs encoding.
final public static int DEFAULT_GZIP_HEADER_LENGTH
     Length of minimual 'default GZIP header.
final public static long DEFAULT_MAX_ARC_FILE_SIZE
     Default maximum ARC file size.
final public static String DOT_ARC_FILE_EXTENSION
     Dot ARC file extension.
final public static String DOT_COMPRESSED_ARC_FILE_EXTENSION
     Compressed dot arc file extension.
final public static String DOT_COMPRESSED_FILE_EXTENSION

final public static String FILENAME_FIELD_KEY
     Key for filename field.
final public static String FILENAME_HEADER_FIELD_KEY
     Key for the ARC Header filename field.
final public static byte[] GZIP_HEADER_BEGIN
     Start of a GZIP header that uses default deflater.
final public static char HEADER_FIELD_SEPARATOR
     ARC header field seperator character.
final public static String IP_HEADER_FIELD_KEY
     Key for the ARC Header IP field.
final public static char LINE_SEPARATOR
     ARC file line seperator character.
final public static String LOCATION_HEADER_FIELD_KEY
     Key for the ARC Header Location field.
final public static int MAX_METADATA_LINE_LENGTH
     Maximum length for a metadata line.
public static int MINIMUM_RECORD_LENGTH
     Minimum possible record length. This is a rough calc.
final public static String OFFSET_FIELD_KEY
     Key for offset field.
final public static String OFFSET_HEADER_FIELD_KEY
     Key for the ARC Header Offset field.
public static List REQUIRED_VERSION_1_HEADER_FIELDS
     Version 1 required metadata fields.
final public static String STATUSCODE_FIELD_KEY
     Key for statuscode field.
final public static String TOKENIZED_PREFIX
     Tokenized field prefix.

Field Detail
ARC_FILE_EXTENSION
final public static String ARC_FILE_EXTENSION(Code)
ARC file extention.

ARC_GZIP_EXTRA_FIELD
final public static byte[] ARC_GZIP_EXTRA_FIELD(Code)
The FLG.FEXTRA field that is added to ARC files. (See RFC1952 to understand FLG.FEXTRA).

ARC_MAGIC_NUMBER
final public static String ARC_MAGIC_NUMBER(Code)
ARC file *MAGIC NUMBER*. Every ARC file must begin w/ this.

CHECKSUM_FIELD_KEY
final public static String CHECKSUM_FIELD_KEY(Code)
Key for checksum field.

CHECKSUM_HEADER_FIELD_KEY
final public static String CHECKSUM_HEADER_FIELD_KEY(Code)
Key for the ARC Header Checksum field. Lowercased.

CODE_HEADER_FIELD_KEY
final public static String CODE_HEADER_FIELD_KEY(Code)
Key for the ARC Header Result Code field. Lowercased.

COMPRESSED_ARC_FILE_EXTENSION
final public static String COMPRESSED_ARC_FILE_EXTENSION(Code)
Compressed arc file extension.

DEFAULT_ENCODING
final public static String DEFAULT_ENCODING(Code)
Encoding to use getting bytes from strings. Specify an encoding rather than leave it to chance: i.e whatever the JVMs encoding. Use an encoding that gets the stream as bytes, not chars.

DEFAULT_GZIP_HEADER_LENGTH
final public static int DEFAULT_GZIP_HEADER_LENGTH(Code)
Length of minimual 'default GZIP header. See RFC1952 for explaination of value of 10.

DEFAULT_MAX_ARC_FILE_SIZE
final public static long DEFAULT_MAX_ARC_FILE_SIZE(Code)
Default maximum ARC file size.

DOT_ARC_FILE_EXTENSION
final public static String DOT_ARC_FILE_EXTENSION(Code)
Dot ARC file extension.

DOT_COMPRESSED_ARC_FILE_EXTENSION
final public static String DOT_COMPRESSED_ARC_FILE_EXTENSION(Code)
Compressed dot arc file extension.

DOT_COMPRESSED_FILE_EXTENSION
final public static String DOT_COMPRESSED_FILE_EXTENSION(Code)

FILENAME_FIELD_KEY
final public static String FILENAME_FIELD_KEY(Code)
Key for filename field.

FILENAME_HEADER_FIELD_KEY
final public static String FILENAME_HEADER_FIELD_KEY(Code)
Key for the ARC Header filename field. Lowercased.

GZIP_HEADER_BEGIN
final public static byte[] GZIP_HEADER_BEGIN(Code)
Start of a GZIP header that uses default deflater.

HEADER_FIELD_SEPARATOR
final public static char HEADER_FIELD_SEPARATOR(Code)
ARC header field seperator character.

IP_HEADER_FIELD_KEY
final public static String IP_HEADER_FIELD_KEY(Code)
Key for the ARC Header IP field. Lowercased.

LINE_SEPARATOR
final public static char LINE_SEPARATOR(Code)
ARC file line seperator character. This is what the alexa c-code looks for delimiting lines.

LOCATION_HEADER_FIELD_KEY
final public static String LOCATION_HEADER_FIELD_KEY(Code)
Key for the ARC Header Location field. Lowercased.

MAX_METADATA_LINE_LENGTH
final public static int MAX_METADATA_LINE_LENGTH(Code)
Maximum length for a metadata line.

MINIMUM_RECORD_LENGTH
public static int MINIMUM_RECORD_LENGTH(Code)
Minimum possible record length. This is a rough calc. When the header is data it will occupy less space.

OFFSET_FIELD_KEY
final public static String OFFSET_FIELD_KEY(Code)
Key for offset field.

OFFSET_HEADER_FIELD_KEY
final public static String OFFSET_HEADER_FIELD_KEY(Code)
Key for the ARC Header Offset field. Lowercased.

REQUIRED_VERSION_1_HEADER_FIELDS
public static List REQUIRED_VERSION_1_HEADER_FIELDS(Code)
Version 1 required metadata fields.

STATUSCODE_FIELD_KEY
final public static String STATUSCODE_FIELD_KEY(Code)
Key for statuscode field.

TOKENIZED_PREFIX
final public static String TOKENIZED_PREFIX(Code)
Tokenized field prefix. Use this prefix for tokenized fields when naming fields in an index.

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