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From Geoff Howard <cocoonge...@yahoo.com>
Subject Re: multipart HTTP and stream generator
Date Thu, 07 Nov 2002 21:44:40 GMT
I'm not exactly sure I've followed what you're trying
to do, but are you aware that multipart requests are
handled automatically by cocoon?  When a file is
included in a request, the default behaviour is to
save it to upload-dir under the work directory in
whatever servlet container you're using.  In tomcat,
this means
$TOMCAT_HOME/work/Standalone/localhost/cocoon/cocoon-files/upload-dir

In addition, an
org.apache.cocoon.components.request.multipart.FilePartFile
(or FilePartArray - both extend FilePart depending on
behaviour - see javadocs for info) object is placed in
the request and can be retrieved by any cocoon
component with a reference to the request.  FilePart
defines a method to get the contents of the file as an
InputStream.  From there you can move it elsewhere on
disk, put it in a database, or parse it and send the
sax events down the line, as it sounds like you want
to do.

HTH,
Geoff Howard

--- Oskar Casquero <jtacaoio@bi.ehu.es> wrote:
> Hi,
> 
> Has anybody tried to get data from a multipart http
> request in cocoon? I've modified the stream
> generator with "marsh" project classes (in
> sourceForge.net) in order to support multipart http
> resquest and it doesn't work, but I've also tested
> the same example in a servlet (outside cocoon) and
> it works, so I don't know what happens. Where is the
> problem? Perhaps in HttpServletRequest request =
> (HttpServletRequest)
>
objectModel.get(HttpEnvironment.HTTP_REQUEST_OBJECT);?
> 
> Oskar
> 
> Here is the generate method of the modified stream
> generator:
> public void generate() throws IOException,
> SAXException, ProcessingException
> 
> {
> 
>     Parser parser = null;
> 
>     String parameter =
> parameters.getParameter(MyStreamGenerator.FORM_NAME,
> null);
> 
>     String myParameter =
> parameters.getParameter(MyStreamGenerator.FILE_NAME,
> null);
> 
>     int len = 0;
> 
>     String contentType = null;
> 
>     try {
> 
>         HttpServletRequest request =
> (HttpServletRequest)
>
objectModel.get(HttpEnvironment.HTTP_REQUEST_OBJECT);
> 
>         contentType = request.getContentType();
> 
>         if (contentType == null) {
> 
>             throw new IOException("Required header
> ContentType is missing.");
> 
>         } else if
>
(contentType.startsWith("application/x-www-form-urlencoded"))
> { 
> 
>             String sXml =
> request.getParameter(parameter);
> 
>             inputSource = new InputSource(new
> StringReader(sXml));
> 
>         } else if
> (contentType.startsWith("multipart/form-data")) {
> 
>             // Instantiate and parse the
> multipart/form-data POST.
> 
>             MultipartServletRequest mpReq = new
> MultipartServletRequest(request);
> 
>             // Get the variables we want from the
> request, including the file.
> 
>             MultipartFileInfo fileInfo =
> mpReq.getFile(myParameter);
> 
> 
> 
>             InputStream fileIn = fileInfo.getFile();
> 
>             len = fileInfo.getLength();
> 
>             PostInputStream anStream = new
> PostInputStream(request.getInputStream(), len);
> 
>             inputSource = new InputSource(anStream);
> 
> 
>         } else if
> (contentType.startsWith("text/plain") ||
> 
>             contentType.startsWith("text/xml") ||
> 
>            
> contentType.startsWith("application/xml")) {
> 
>             len = request.getContentLength();
> 
>             if (len > 0) {
> 
>                 PostInputStream anStream = new
> PostInputStream(request.getInputStream(), len);
> 
>                 inputSource = new
> InputSource(anStream);
> 
>             } else {
> 
>                 throw new
> IOException("getContentLen() == 0");
> 
>             }
> 


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