Java Doc for FetchFTP.java in  » Web-Crawler » heritrix » org » archive » crawler » fetcher » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Web Crawler » heritrix » org.archive.crawler.fetcher 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


org.archive.crawler.framework.Processor
   org.archive.crawler.fetcher.FetchFTP

FetchFTP
public class FetchFTP extends Processor implements CoreAttributeConstants(Code)
Fetches documents and directory listings using FTP. This class will also try to extract FTP "links" from directory listings. For this class to archive a directory listing, the remote FTP server must support the NLIST command. Most modern FTP servers should.
author:
   pjack


Field Summary
final public static  StringATTR_BANDWIDTH
     The name for the fetch-bandwidth attribute.
final public static  StringATTR_MAX_LENGTH
     The name for the max-length-bytes attribute.
final public static  StringATTR_PASSWORD
     The name for the password attribute.
final public static  StringATTR_TIMEOUT
     The name for the timeout-seconds attribute.
final public static  StringATTR_USERNAME
     The name for the username attribute.

Constructor Summary
public  FetchFTP(String name)
     Constructs a new FetchFTP.

Method Summary
public  StringdeterminePassword(CrawlURI curi)
     Determines the password for the given URI.
public  booleangetExtractFromDirs(CrawlURI curi)
     Returns the extract.from.dirs attribute for this FetchFTP and the given curi.
public  booleangetExtractParent(CrawlURI curi)
     Returns the extract.parent attribute for this FetchFTP and the given curi.
public  intgetFetchBandwidth(CrawlURI curi)
     Returns the fetch-bandwidth attribute for this FetchFTP and the given curi.
public  longgetMaxLength(CrawlURI curi)
     Returns the max-length-bytes attribute for this FetchFTP and the given curi.
public  intgetTimeout(CrawlURI curi)
     Returns the timeout-seconds attribute for this FetchFTP and the given curi.
public  voidinnerProcess(CrawlURI curi)
     Processes the given URI.

Field Detail
ATTR_BANDWIDTH
final public static String ATTR_BANDWIDTH(Code)
The name for the fetch-bandwidth attribute.



ATTR_MAX_LENGTH
final public static String ATTR_MAX_LENGTH(Code)
The name for the max-length-bytes attribute.



ATTR_PASSWORD
final public static String ATTR_PASSWORD(Code)
The name for the password attribute.



ATTR_TIMEOUT
final public static String ATTR_TIMEOUT(Code)
The name for the timeout-seconds attribute.



ATTR_USERNAME
final public static String ATTR_USERNAME(Code)
The name for the username attribute.




Constructor Detail
FetchFTP
public FetchFTP(String name)(Code)
Constructs a new FetchFTP.
Parameters:
  name - the name of this processor




Method Detail
determinePassword
public String determinePassword(CrawlURI curi)(Code)
Determines the password for the given URI. If the URI itself contains a password, then that password is returned. Otherwise the settings system is probed for the password attribute, and the value for that attribute is returned.
Parameters:
  curi - the curi whose password to return that password



getExtractFromDirs
public boolean getExtractFromDirs(CrawlURI curi)(Code)
Returns the extract.from.dirs attribute for this FetchFTP and the given curi.
Parameters:
  curi - the curi whose attribute to return that curi's extract.from.dirs



getExtractParent
public boolean getExtractParent(CrawlURI curi)(Code)
Returns the extract.parent attribute for this FetchFTP and the given curi.
Parameters:
  curi - the curi whose attribute to return that curi's extract-parent



getFetchBandwidth
public int getFetchBandwidth(CrawlURI curi)(Code)
Returns the fetch-bandwidth attribute for this FetchFTP and the given curi.
Parameters:
  curi - the curi whose attribute to return that curi's fetch-bandwidth



getMaxLength
public long getMaxLength(CrawlURI curi)(Code)
Returns the max-length-bytes attribute for this FetchFTP and the given curi.
Parameters:
  curi - the curi whose attribute to return that curi's max-length-bytes



getTimeout
public int getTimeout(CrawlURI curi)(Code)
Returns the timeout-seconds attribute for this FetchFTP and the given curi.
Parameters:
  curi - the curi whose attribute to return that curi's timeout-seconds



innerProcess
public void innerProcess(CrawlURI curi) throws InterruptedException(Code)
Processes the given URI. If the given URI is not an FTP URI, then this method does nothing. Otherwise an attempt is made to connect to the FTP server.

If the connection is successful, an attempt will be made to CD to the path specified in the URI. If the remote CD command succeeds, then it is assumed that the URI represents a directory. If the CD command fails, then it is assumed that the URI represents a file.

For directories, the directory listing will be fetched using the FTP LIST command, and saved to the HttpRecorder. If the extract.from.dirs attribute is set to true, then the files in the fetched list will be added to the curi as extracted FTP links. (It was easier to do that here, rather than writing a separate FTPExtractor.)

For files, the file will be fetched using the FTP RETR command, and saved to the HttpRecorder.

All file transfers (including directory listings) occur using Binary mode transfer. Also, the local passive transfer mode is always used, to play well with firewalls.
Parameters:
  curi - the curi to process
throws:
  InterruptedException - if the thread is interrupted duringprocessing




Fields inherited from org.archive.crawler.framework.Processor
final public static String ATTR_DECIDE_RULES(Code)(Java Doc)
final public static String ATTR_ENABLED(Code)(Java Doc)
protected String attrDecideRules(Code)(Java Doc)

Methods inherited from org.archive.crawler.framework.Processor
protected void checkForInterrupt() throws InterruptedException(Code)(Java Doc)
protected void finalTasks()(Code)(Java Doc)
public CrawlController getController()(Code)(Java Doc)
protected DecideRule getDecideRule(Object o)(Code)(Java Doc)
public Processor getDefaultNextProcessor(CrawlURI curi)(Code)(Java Doc)
protected void initialTasks()(Code)(Java Doc)
protected void innerProcess(CrawlURI curi) throws InterruptedException(Code)(Java Doc)
protected void innerRejectProcess(CrawlURI curi) throws InterruptedException(Code)(Java Doc)
protected boolean isContentToProcess(CrawlURI curi)(Code)(Java Doc)
protected boolean isExpectedMimeType(String contentType, String expectedPrefix)(Code)(Java Doc)
protected boolean isHttpTransactionContentToProcess(CrawlURI curi)(Code)(Java Doc)
public void kickUpdate()(Code)(Java Doc)
final public void process(CrawlURI curi) throws InterruptedException(Code)(Java Doc)
public String report()(Code)(Java Doc)
protected boolean rulesAccept(Object o)(Code)(Java Doc)
protected boolean rulesAccept(DecideRule rule, Object o)(Code)(Java Doc)
public void setDefaultNextProcessor(Processor nextProcessor)(Code)(Java Doc)
public Processor spawn(int serialNum)(Code)(Java Doc)

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