java - Using JSch ChannelSftp : What file handling is required while calling ChannelSftp.cd(...) and ls(..) methods? -


below code, channel object initialized : (sftp internal file. let's assume changedirectory() method part of class. )

    private void changedirectory() throws sftpexception {     // jsch initializes     session session = jsch.getsession( "remote-username", "remote-host" );      channel channel = session.openchannel( "sftp" );     channel.connect();     channelsftp sftpchannel = (channelsftp) channel;     // remotedirectory initialized     sftpchannel.cd(remotedirectory); }

when code being executed, getting errors in below format :

caused by: 4:  @ com.jcraft.jsch.channelsftp.cd(channelsftp.java:359) @ com.dclear.cmn.cms.net.sftp.changedirectory(sftp.java:139) @ com.dclear.cmn.cms.net.sftp.receivefile(sftp.java:80) ... 7 more caused by: java.lang.indexoutofboundsexception     @ java.io.pipedinputstream.read(pipedinputstream.java:372)     @ com.jcraft.jsch.channelsftp.fill(channelsftp.java:2869)     @ com.jcraft.jsch.channelsftp.fill(channelsftp.java:2861)     @ com.jcraft.jsch.channelsftp._realpath(channelsftp.java:2319)     @ com.jcraft.jsch.channelsftp.cd(channelsftp.java:342)     ... 9 more

however when dig deep it, understand avoid indexoutofboundsexception have take care of following :

len negative, or len greater b.length - off :

b - buffer data read. off - start offset in destination array b len - maximum number of bytes read.

but, internal code..how keep check before calling cd(..) method on file?? have file location & filesize.

for of files getting below exception :

 exception: failed directory listing in sftp protocol.... 4:      @ com.jcraft.jsch.channelsftp._stat(channelsftp.java:2187)     @ com.jcraft.jsch.channelsftp._stat(channelsftp.java:2202)     @ com.jcraft.jsch.channelsftp.ls(channelsftp.java:1566)     @ com.jcraft.jsch.channelsftp.ls(channelsftp.java:1527)

which comes when code calls :

list<lsentry> ls = sftpchannel.ls(remotedirectory);

any inputs avoid these random errors? sure because file handling missed , behaving differently different files?

fyi jsch version : jsch\1.5\jsch-0.1.50.jar channelsftp (version 1.4 : 48.0, super bit)


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Comments

  1. laxman10 July 2021 at 22:44

    Can you share code snippet to resolve indexoutofboundsexception on channelsftp.cd method

    ReplyDelete

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