org.archive.io.warc

Class WARCReaderFactory

java.lang.Object

org.archive.io.ArchiveReaderFactory

org.archive.io.warc.WARCReaderFactory

All Implemented Interfaces:

ArchiveFileConstants, WARCConstants

public class WARCReaderFactory
extends ArchiveReaderFactory
implements WARCConstants

Factory for WARC Readers. Figures whether to give out a compressed file Reader or an uncompressed Reader.

Version:

$Date: 2006-08-23 17:59:04 -0700 (Wed, 23 Aug 2006) $ $Version$

Author:

stack

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	WARCReaderFactory.CompressedWARCReader Compressed WARC file reader.
class	WARCReaderFactory.UncompressedWARCReader Uncompressed WARC file reader.

Nested classes/interfaces inherited from interface org.archive.format.warc.WARCConstants

WARCConstants.WARCRecordType

Field Summary

Fields inherited from interface org.archive.format.warc.WARCConstants

COLON_SPACE, COMPRESSED_WARC_FILE_EXTENSION, CONTENT_DESCRIPTION, CONTENT_LENGTH, CONTENT_TYPE, DEFAULT_ENCODING, DEFAULT_MAX_WARC_FILE_SIZE, DOT_COMPRESSED_WARC_FILE_EXTENSION, DOT_WARC_FILE_EXTENSION, FTP_CONTROL_CONVERSATION_MIMETYPE, HEADER_FIELD_SEPARATOR, HEADER_KEY_BLOCK_DIGEST, HEADER_KEY_CONCURRENT_TO, HEADER_KEY_DATE, HEADER_KEY_ETAG, HEADER_KEY_FILENAME, HEADER_KEY_ID, HEADER_KEY_IP, HEADER_KEY_LAST_MODIFIED, HEADER_KEY_PAYLOAD_DIGEST, HEADER_KEY_PROFILE, HEADER_KEY_REFERS_TO, HEADER_KEY_REFERS_TO_DATE, HEADER_KEY_REFERS_TO_FILE_OFFSET, HEADER_KEY_REFERS_TO_FILENAME, HEADER_KEY_REFERS_TO_TARGET_URI, HEADER_KEY_TRUNCATED, HEADER_KEY_TYPE, HEADER_KEY_URI, HEADER_LINE_ENCODING, HTTP_REQUEST_MIMETYPE, HTTP_RESPONSE_MIMETYPE, MAX_LINE_LENGTH, MAX_WARC_HEADER_LINE_LENGTH, NAMED_FIELD_CHECKSUM_LABEL, NAMED_FIELD_DESCRIPTION, NAMED_FIELD_FILEDESC, NAMED_FIELD_IP_LABEL, NAMED_FIELD_RELATED_LABEL, NAMED_FIELD_TRUNCATED, NAMED_FIELD_TRUNCATED_VALUE_HEAD, NAMED_FIELD_TRUNCATED_VALUE_LENGTH, NAMED_FIELD_TRUNCATED_VALUE_TIME, NAMED_FIELD_TRUNCATED_VALUE_UNSPECIFIED, NAMED_FIELD_WARCFILENAME, PLACEHOLDER_RECORD_LENGTH_STRING, PROFILE_REVISIT_IDENTICAL_DIGEST, PROFILE_REVISIT_NOT_MODIFIED, PROFILE_REVISIT_URI_AGNOSTIC_IDENTICAL_DIGEST, TRUNCATED_VALUE_UNSPECIFIED, TYPE, WARC_FIELDS_TYPE, WARC_FILE_EXTENSION, WARC_HEADER_ENCODING, WARC_ID, WARC_MAGIC, WARC_VERSION, WSP

Fields inherited from interface org.archive.format.ArchiveFileConstants

ABSOLUTE_OFFSET_KEY, CDX, CDX_FILE, CDX_LINE_BUFFER_SIZE, CRLF, DATE_FIELD_KEY, DEFAULT_DIGEST_METHOD, DOT_COMPRESSED_FILE_EXTENSION, DUMP, GZIP_DUMP, HEADER, INVALID_SUFFIX, LENGTH_FIELD_KEY, MIMETYPE_FIELD_KEY, NOHEAD, OCCUPIED_SUFFIX, READER_IDENTIFIER_FIELD_KEY, RECORD_IDENTIFIER_FIELD_KEY, SINGLE_SPACE, TYPE_FIELD_KEY, URL_FIELD_KEY, VERSION_FIELD_KEY

Method Summary

Methods

Modifier and Type	Method and Description
static WARCReader	get(File f)
static WARCReader	get(File f, long offset)
static WARCReader	get(String arcFileOrUrl)
static ArchiveReader	get(String s, InputStream is, boolean atFirstRecord)
static WARCReader	get(URL arcUrl) Get an ARCReader.
static WARCReader	get(URL arcUrl, long offset)
protected ArchiveReader	getArchiveReader(File f, long offset)
protected ArchiveReader	getArchiveReader(String f, InputStream is, boolean atFirstRecord)
static boolean	isWARCSuffix(String f)
static boolean	testCompressedWARCFile(File f) Check file is compressed WARC.

Methods inherited from class org.archive.io.ArchiveReaderFactory

addUserAgent, getArchiveReader, getArchiveReader, getArchiveReader, getArchiveReader, getArchiveReader, isCompressed, makeARCLocal

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

get

public static WARCReader get(String arcFileOrUrl)
                      throws MalformedURLException,
                             IOException

Throws:

MalformedURLException

IOException

get

public static WARCReader get(File f)
                      throws IOException

Throws:

IOException

get

public static WARCReader get(File f,
             long offset)
                      throws IOException

Parameters:

f - An arcfile to read.

offset - Have returned Reader set to start reading at this offset.

Returns:

A WARCReader.

Throws:

IOException

getArchiveReader

protected ArchiveReader getArchiveReader(File f,
                             long offset)
                                  throws IOException

Overrides:

getArchiveReader in class ArchiveReaderFactory

Throws:

IOException

get

public static ArchiveReader get(String s,
                InputStream is,
                boolean atFirstRecord)
                         throws IOException

Throws:

IOException

getArchiveReader

protected ArchiveReader getArchiveReader(String f,
                             InputStream is,
                             boolean atFirstRecord)
                                  throws IOException

Overrides:

getArchiveReader in class ArchiveReaderFactory

Throws:

IOException

get

public static WARCReader get(URL arcUrl,
             long offset)
                      throws IOException

Throws:

IOException

get

public static WARCReader get(URL arcUrl)
                      throws IOException

Get an ARCReader. Pulls the ARC local into whereever the System Property java.io.tmpdir points. It then hands back an ARCReader that points at this local copy. A close on this ARCReader instance will remove the local copy.

Parameters:

arcUrl - An URL that points at an ARC.

Returns:

An ARCReader.

Throws:

IOException

testCompressedWARCFile

public static boolean testCompressedWARCFile(File f)
                                      throws IOException

Check file is compressed WARC.

Parameters:

f - File to test.

Returns:

True if this is compressed WARC (TODO: Just tests if file is GZIP'd file (It begins w/ GZIP MAGIC)).

Throws:

IOException - If file does not exist or is not unreadable.

isWARCSuffix

public static boolean isWARCSuffix(String f)