I found my issue.
I use an OutputStream to write the InputStream to, and then convert back as
needed.
Not elegant, but it worked.
Begin forwarded message:
> From: The Stake And Chain <thestakeandch...@gmail.com>
> Subject: Pipe closed ChannelSftp
> Date: July 10, 2014 at 12:09:01 EDT
> To: jsch-users@lists.sourceforge.net
>
>
> Hello,
>
>
> I'm using jsch-0.1.51, and I'm using ChannelSftp to get and put PGP-encrypted
> data to a remote server that I do not control.
>
>
> The put works perfectly, but with the get I'm having issues.
>
>
> I initialize a session, and connect like so (some commenting has been
> redacted):
>
>
> private void initSftpConnection() throws JSchException {
>
>
> initSftpParameters();
>
>
> JSch jSch = new JSch();
>
>
> try {
>
>
>
> jSch.addIdentity(sftpPrivateKey);
>
> session =
> jSch.getSession(userName, remoteHost, Integer.parseInt(port));
>
>
>
> session.setConfig("StrictHostKeyChecking", "no");
>
>
> session.connect();
>
> logger.debug("Session
> established.");
>
>
> sftp = (ChannelSftp)
> session.openChannel("sftp");
>
> sftp.connect();
>
>
> } catch (JSchException e) {
>
> logger.fatal("Error
> establishing an SFTP connection", e);
>
> throw e;
>
> }
>
> }
>
>
> Since I'm dealing with encrypted data, I want to return an InputStream which
> I pass to a decryption method, and I do so as described in the API (once
> again, I've redeacted some comments and logging):
>
>
> public InputStream getResponse() {
>
>
> InputStream encryptedResponse = null;
>
>
> try {
>
>
> initSftpConnection();
>
>
>
> sftp.cd(remoteDownloadDirectory);
>
>
> @SuppressWarnings("unchecked")
>
> Vector<ChannelSftp.LsEntry>
> remoteDirectoryEntries = sftp.ls(sftp.pwd());
>
> Iterator<ChannelSftp.LsEntry>
> itr = remoteDirectoryEntries.iterator();
>
>
> String downloadFileName = "";
>
> boolean isDownloadFileFound =
> false;
>
> ChannelSftp.LsEntry
> remoteEntry = null;
>
>
> while (itr.hasNext()) {
>
> remoteEntry =
> itr.next();
>
>
> downloadFileName = remoteEntry.getFilename();
>
>
> if
> (downloadFileName.startsWith(classId)) {
>
>
> isDownloadFileFound = true;
>
>
> break;
>
> }
>
> }
>
>
> if (isDownloadFileFound) {
>
>
>
> logger.debug("Downloading file " + downloadFileName);
>
>
> encryptedResponse = sftp.get(downloadFileName);
>
>
> logger.debug("SFTP get was successful.");
>
>
> }
>
>
> } catch (Exception e) {
>
> logger.fatal("Error in
> getResponse ", e);
>
> } finally {
>
>
>
> sftp.disconnect();
>
> session.disconnect();
>
> }
>
>
> return encryptedResponse;
>
> }
>
>
> The problem is, I get the following exception:
>
>
> java.io.IOException: Pipe closed
>
> at java.io.PipedInputStream.read(PipedInputStream.java:302)
>
> at java.io.PipedInputStream.read(PipedInputStream.java:372)
>
> at com.jcraft.jsch.ChannelSftp.fill(ChannelSftp.java:2527)
>
> at com.jcraft.jsch.ChannelSftp.header(ChannelSftp.java:2553)
>
> at com.jcraft.jsch.ChannelSftp.access$500(ChannelSftp.java:36)
>
> at com.jcraft.jsch.ChannelSftp$2.read(ChannelSftp.java:1253)
>
> at
> java.io.BufferedInputStream.fill(BufferedInputStream.java:229)
>
> at
> java.io.BufferedInputStream.read(BufferedInputStream.java:248)
>
> at org.bouncycastle.openpgp.PGPUtil.getDecoderStream(Unknown
> Source)
>
>
> The connection is established fine. I find the file, and it begins to
> download.
>
>
> Looking over the PipedInputStream source, it appears the Pipe Closed
> exception is thrown in the read method of PipedInputStream if the close
> method is invoked.
>
>
> Is the PipedInputStream still trying to read after the session is closed? I
> never explicitly call the close method on the stream, but it appears the
> stream is indirectly closed when the disconnect method is called. Also, the
> stream is making it to my decryption method. What am I missing?
>
>
> Peter
>
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