I am trying to use Commons VFS to download an FTP file from:
ftp://ftp.ncbi.nih.gov/pub/HomoloGene/current/homologene.data
Here is my code:
FileSystemManager fsm = VFS.getManager();
FileObject remoteFile =
fsm.resolveFile("ftp://ftp.ncbi.nih.gov/pub/HomoloGene/current/homologene.data";);
File tmp = File.createTempFile("download", ".txt");
tmp.deleteOnExit();
final FileObject tempFile = fsm.toFileObject(tmp);
FileUtil.copyContent(remoteFile, tempFile);
Now, sometimes this runs just fine and sometimes I get an exception:
Exception in thread "main" org.apache.commons.vfs.FileSystemException:
Could not read from
"ftp://ftp.ncbi.nih.gov/pub/HomoloGene/current/homologene.data";
because it is a not a file.
at
org.apache.commons.vfs.provider.AbstractFileObject.getInputStream(AbstractFileObject.java:1149)
at
org.apache.commons.vfs.provider.DefaultFileContent.getInputStream(DefaultFileContent.java:360)
at org.apache.commons.vfs.FileUtil.writeContent(FileUtil.java:71)
at org.apache.commons.vfs.FileUtil.copyContent(FileUtil.java:103)
Any ideas? Is it just a problem with the remote FTP server being
flaky? I haven't had this trouble before with this code.
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