> From: Stefan Riegel [mailto:[EMAIL PROTECTED]] > > Hello, everybody, > > I do not understand the XSP upload example. Yes, it works fine, but I would > like to understand as much as possible. I guess their is some "magic" behind > the scene. > > I did some reading of the API Javadoc, but I'am still not experienced enough > reading source code. What to do? Should I give up learning Cocoon :-(
Try reading Java source code generated from the XSP. > The example XSP-Source follows. I added comments about what I don't > understand. > > > <?xml version="1.0" encoding="ISO-8859-1"?> > > <!-- CVS: $Id: upload.xsp,v 1.3 2002/02/09 06:21:57 vgritsenko Exp $ --> > > > <!-- > QUESTION: the namespace declarations for request, response and log are > not used and could be omitted? Is this correct? > --> If not used then can be omitted. > <xsp:page language="java" > xmlns:xsp="http://apache.org/xsp"; > xmlns:xsp-request="http://apache.org/xsp/request/2.0"; > xmlns:xsp-response="http://apache.org/xsp/response/2.0"; > xmlns:log="http://apache.org/xsp/log/2.0";> > > <xsp:structure> > <!-- > QUESTION: Same with the XSPUtil import. Am I right? > --> Same. > <xsp:include>org.apache.cocoon.components.language.markup.xsp.XSPUtil</x sp:i > nclude> > > <xsp:include>org.apache.avalon.framework.context.ContextException</xsp:i nclu > de> > </xsp:structure> > > <!-- > QUESTIONS: I do not understand this part. Who calls conceptualize? Contextualize. Avalon does. See http://jakarta.apache.org/avalon/framework/reference-the-lifecycle.html > Where does context > (org.apache.cocoon.generation.ServletGenerator.context?) > come from? Avalon gives. http://jakarta.apache.org/avalon/api/org/apache/avalon/framework/context /Context.html > And the get method of context? See link above. > Their must be some "build in" > upload > functionality, please explain if You are patient enough. Yes, there is. And it uses maybeupload library, or Multipart request parser. See org.apache.cocoon.components.request package. Vadim > --> > <xsp:logic> > File uploadDir = null; > /** Contextualize this class */ > public void contextualize(Context context) throws ContextException { > uploadDir = (File) context.get(Constants.CONTEXT_UPLOAD_DIR); > } > </xsp:logic> > > <page> > <title>This form allows you upload files</title> > <content> > <para> > <form method="post" enctype="multipart/form-data" > action="upload.xsp"> > File: <input type="file" name="uploaded_file" size="50" /> > <p><input type="submit" value="Upload File" /></p> > </form> > </para> > <para> > <ul> > <xsp:logic> > getLogger().debug("Dir=" + uploadDir); > String[] filelist = uploadDir.list(); > <![CDATA[ > getLogger().debug("List=" + filelist.length); > for (int i = 0; i < filelist.length; i++) { > getLogger().debug("File [" + i + "]=" + filelist[i]); > ]]> > <li> > <xsp:expr>filelist[i]</xsp:expr> > </li> > <![CDATA[ > } > ]]> > </xsp:logic> > </ul> > </para> > <para>Brought to you by Cocoon at <xsp:expr>new > Date()</xsp:expr>.</para> > > </content> > </page> > </xsp:page> > > > Thank You. > > Regards > Stefan > -- > > Stefan Riegel --------------------------------------------------------------------- Please check that your question has not already been answered in the FAQ before posting. <http://xml.apache.org/cocoon/faq/index.html> To unsubscribe, e-mail: <[EMAIL PROTECTED]> For additional commands, e-mail: <[EMAIL PROTECTED]>
