public String getFileContent(String fileName) throws Exception {
FileSystemManager fsManager = null;
FileObject sftpFile = null;
FileObject src = null; // used for cleanup in release()
String fileContent = null;
try {
System.out.println("SFTP download");
FileSystemOptions opts = null;
// app.initialize();
try {
fsManager = VFS.getManager();
} catch (FileSystemException ex) {
throw new RuntimeException("failed to get fsManager from VFS", ex);
}
UserAuthenticator auth = new StaticUserAuthenticator(null, this.user, this.password);
opts = new FileSystemOptions();
try {
DefaultFileSystemConfigBuilder.getInstance().setUserAuthenticator(opts, auth);
SftpFileSystemConfigBuilder.getInstance().setStrictHostKeyChecking(opts, "no");
} catch (FileSystemException ex) {
throw new RuntimeException("setUserAuthenticator failed", ex);
}
// app.process();
String startPath =
"sftp://"
+ this.user
+ ":"
+ this.password
+ "@"
+ this.host
+ ":22"
+ this.remoteDir
+ fileName;
// Set starting path on remote SFTP server.
try {
sftpFile = fsManager.resolveFile(startPath, opts);
System.out.println("SFTP connection successfully established to " + startPath);
} catch (FileSystemException ex) {
throw new RuntimeException("SFTP error parsing path " + this.remoteDir, ex);
}
if (sftpFile.exists()) {
FileContent fc = sftpFile.getContent();
StringWriter writer = new StringWriter();
IOUtils.copy(fc.getInputStream(), writer, encoding);
String theString = writer.toString();
// System.out.println(theString);
fileContent = theString;
}
} finally {
// app.release();
/** Release system resources, close connection to the filesystem. */
try {
FileSystem fs = null;
if (sftpFile != null) {
fs = sftpFile.getFileSystem(); // This works even if the src is closed.
fsManager.closeFileSystem(fs);
} // TODO if sftpFile != null
} catch (Exception e) {
System.out.println(e);
}
}
return fileContent;
}
