On Jan 9, 2009, at 5:36 PM, Martin Holmes wrote:
Hi there,
I'm trying to write flowscript which saves the output of a pipeline
onto the file system. I've successfully done this for several
pipelines, following the instructions on the WIKI. Up to now, I've
been saving all the output files in an existing directory. Now I
want to save one pipeline into a subdirectory, which I create on the
fly based on the document id:
Using relative pathnames is kind of iffy:
var xhtml_folder = new Packages.java.io.File("teiJournal/backups/" +
styleGuide + "/" + docId);
if (!xhtml_folder.exists()){
xhtml_folder.mkdir();
}
If you're running cocoon in tomcat, the current working directory will
likely be the directory you
were in when you ran startup.sh -- not necessarily tomcat or cocoons
home directory. ( I'm guessing
that other servlet containers do the same thing. )
The new folder is named with the string in docId, and its parent
folder already exists. The parent folder is writable by the user
under which Cocoon is running (in fact, it's owned by that user),
and other pipelines can already save files into it; however, I just
can't get Cocoon to create the subfolder. This is running on a
RedHat server. If I modify the function to write the file directly
to the existing directory, it works fine.
Does anyone have any idea why this might fail? This is the error,
followed by the complete flowscript function:
ERROR (2009-01-09) 14:30.51:770 [flow] (/ialltjournal/teiJournal/
backups/apa/doc.xhtml?id=iallt_40_01_sawhill) http-8081-7/MemberBox:
JavaException: java.io.FileNotFoundException: /usr/local/apache-
tomcat-dev/webapps/ialltjournal/teiJournal/backups/apa/
iallt_40_01_sawhill/iallt_40_01_sawhill.xhtml (No such file or
directory)
(In other words, the output file is not saved, because the new
directory has not been successfully created.)
function makeBackupXHTML() {
var xml_file;
var xhtml_folder;
var xhtml_file;
var outstreamXHTML;
try {
// Get required variables.
var folder =
Packages.java.lang.String(cocoon.parameters["folder"]);
var styleGuide =
Packages.java.lang.String(cocoon.parameters["styleGuide"]);
var qParams =
Packages.java.lang.String(cocoon.parameters["urlQueryString"]);
var arrTemp = qParams.split("&");
var docId = arrTemp[0].split("=")[1];
//Create a directory to dump the files to
xhtml_folder = new Packages.java.io.File("teiJournal/backups/" +
styleGuide + "/" + docId);
if (!xhtml_folder.exists()){
xhtml_folder.mkdir();
}
And here you're prefixing teiJournal with parameter "folder" ,
so the path printed in the error message for the file may not match
the relative directory path name
for the directory you created. ( What is being passed as parameter
"folder" ? )
Rather than concatenating the pathnames twice, you might use the
File(File parent, String child)
constructor for the second instance, using File xhtml_folder as the
parent File.
This will guarantee that they are both on the same path.
// Create link to file
xhtml_file = Packages.java.io.File(folder + "teiJournal/
backups/" + styleGuide + "/" + docId + "/" + docId + ".xhtml");
// Create outputstream to dump the results of conversion to the file
outstreamXHTML = new
Packages.java.io.FileOutputStream( xhtml_file );
// Call cocoon pipeline and save the results to the outputstream
var pipePath = styleGuide + "/doc.xhtml?id=" + docId;
cocoon.processPipelineTo(pipePath, null, outstreamXHTML);
outstreamXHTML.close();
// Bounce back to the backups list page.
cocoon.redirectTo("../../backups.xhtml?styleGuide=" + styleGuide
+ "#" + docId, true);
} catch( ex ) {
cocoon.log.error(ex);
// Smth. went wrong. Sending a error.txt file to the browser
cocoon.sendPage("backups/save_file_error.txt", null);
}
}
-- Steve Majewski / UVA Alderman Library
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