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From "Schalk" <sch...@volume4.co.za>
Subject RE: [FileUpload] Problems with chaining uploading
Date Tue, 01 Jun 2004 10:01:22 GMT
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Schalk Neethling
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:: -----Original Message-----
:: From: Florian Kiebel [mailto:florian.kiebel@matamore.com]
:: Sent: Tuesday, June 01, 2004 11:50 AM
:: To: 'Jakarta Commons Users List'
:: Subject: RE: [FileUpload] Problems with chaining uploading
:: 
:: Hello Martin,
:: 
:: I am sorry to use jsp pages but perhaps (surely) it's a silly question,
the
:: jsp pages aren't compiled into servlet? Perhaps I didn't correctly
:: understand the principles of jsp and servlets...
:: 
:: But why does it work correctly with one file and not the other?
:: Actually, I think Commons-Fileupload lacks of documentation... There is
no
:: example of use of this package or I didn't found them...
:: 
:: Do you know any links which permits me to solve my problem of servlet?
:: (Links with complete examples like servlet code and/or form code)
:: 
:: And other question, I didn't understand your last reported problem. Does
it
:: mean I must use a "response.sendRedirect()" instead of a
:: "request.sendRedirect()" ?
:: 
:: I hope you could help me, as you surely guess I am a newbie in the jsp
and
:: servlet world so I try to learn a maximum of things.
:: 
:: Nevertheless, I thank you for your time...
:: 
:: Florian Kiebel
:: 
:: -----Message d'origine-----
:: De : Martin Cooper [mailto:martinc@apache.org]
:: Envoyé : lundi 31 mai 2004 19:28
:: À : Jakarta Commons Users List
:: Objet : Re: [FileUpload] Problems with chaining uploading
:: 
:: Why, oh why, do so many people insist on using JSP pages for binary
:: request handling that should be in a servlet...
:: 
:: Anyway, I see two related problems (apart from the fact that the code
:: should be in a servlet).
:: 
:: 1) Redirecting POST requests is generally disallowed, and is specifically
:: disallowed by the HTTP spec without explicit confirmation from the end
:: user.
:: 
:: 2) You are writing to the response, and then redirecting the request. You
:: can't do that - a redirect tells the browser to make a separate request
:: for the subsequent page, and having anything committed in the response
:: prior to doing a redirect is pretty much guaranteed to cause problems.
:: 
:: --
:: Martin Cooper
:: 
:: 
:: On Mon, 31 May 2004, Florian Kiebel wrote:
:: 
:: > Hello!
:: >
:: > I have some problems with FileUpload. So I have two jsp scripts.
:: > First one is the form script testUpload.jsp... There are an hidden
field,
:: a
:: > form field and a file field. Here is the code: (my apologizes for the
:: > comment in French)
:: >
:: > <%@ page language="java" %>
:: > <%@ page import="modula.*" %>
:: > <!DOCTYPE HTML PUBLIC "-//w3c//dtd html 4.0 transitional//en">
:: > <html>
:: > <head>
:: > <title>Lomboz JSP</title>
:: > </head>
:: > <body bgcolor="#FFFFFF">
:: >
:: > <form name="upload" method="post" action="upload.jsp"
:: > enctype="multipart/form-data" >
:: > <input type="hidden" name="nbPiecesJointes" value="<%=
:: > request.getParameter("nb") %>">
:: > <div style="text-align:center; width : 99%;">
:: > 	<!-- Titre de la page -->
:: > 	<div class="titre">.: CREER UN MARCHE - ETAPE 3b :.</div>
:: > 	<!-- /Titre de la page -->
:: > 	<br />
:: > 	<!-- Rappel infos administratives -->
:: > 	<!-- /Rappel infos administratives -->
:: > 	<br />
:: > 	<!-- Gestion des pièces jointes obligatoires -->
:: > 	<div class="result">
:: > 		<div>
:: > 			<table width="100%" cellpadding="0" cellspacing="0">
:: > 				<tr>
:: > 					<td class="titre_gris">.: Piece
:: Jointe :.</td>
:: > 					<td class="titre_gris"
:: style="text-align:right;">
:: > 					<strong>Reste : <%=
:: request.getParameter("nb") %></strong></td>
:: > 				</tr>
:: > 			</table>
:: > 		</div>
:: > 		<div class="contenu">
:: > 			 <table width="100%" cellpadding="0"
:: cellspacing="0">
:: > 				<tr>
:: > 					<td style="width : 50% ; text-align
:: : right;">
:: > <%
:: > 	MarchePieceJointeType[] listeTypes =
:: > MarchePieceJointeType.getAllMarchePieceJointeType();
:: > %>
:: > 						<select name="typeFile">
:: > 							<option> Choisissez
:: un type de pièce jointe </option>
:: > <%
:: > 		for (int j = 0; j < listeTypes.length; j++)
:: > 		{
:: > %>
:: > 							<option value="<%=
:: listeTypes[j].getIdType() %>">
:: > 							<%=
:: listeTypes[j].getTypeDocument() %></option>
:: > <%
:: > 		}
:: > %>
:: > 						</select>
:: > 					</td>
:: > 					<td style="text-align : left;">
:: > 					<input type="file" name="file">
:: > 					</td>
:: > 				</tr>
:: > 			</table>
:: > 		</div>
:: > 	</div>
:: > 	<!-- /Gestion des pièces jointes obligatoires -->
:: > 	<br />
:: > </div>
:: > <div align="center"><input type='submit' name='submit' value="Valider
les
:: > informations de l'étape 3" >
:: > &nbsp;<input type='reset' name='RAZ' value='Annuler' ></div>
:: > </form>
:: >
:: > </body>
:: > </html>
:: >
:: > And I have the second script named upload.jsp which must parse the
request
:: > and upload file.
:: > There is also in this script another form which permits to redirect the
:: page
:: > towards the testUpload.jsp with the hidden field nbPiecesJointes minus
1.
:: > Here is the code of upload.jsp:
:: > <%@ page import="modula.*" %>
:: > <%@ page import="java.io.*, java.util.*, org.w3c.dom.*,
:: > org.apache.commons.fileupload.*" %>
:: > <%
:: > System.out.println("******* upload.jsp *******");
:: > // PieceJointeProposition pjprop = new PieceJointeProposition
:: > (beanUser.cnDBConn);
:: > String fileNameInServer;
:: > int  yourMaxMemorySize = 1024 * 1024 * 8;
:: > int  yourMaxRequestSize = 1024 * 1024 * 8;
:: > int nbPiecesJointes = -1;
:: > String yourTempDirectory = "c:\\temp\\";
:: >
:: > fileNameInServer="";
:: >
:: > DiskFileUpload upload = new DiskFileUpload();
:: >
:: >
:: > // Set upload parameters
:: > upload.setSizeThreshold(yourMaxMemorySize);
:: > upload.setSizeMax(yourMaxRequestSize);
:: > upload.setRepositoryPath(yourTempDirectory);
:: >
:: > // Parse the request
:: > System.out.println("Parse the request");
:: >
:: >
:: > // Parse the request
:: > List items = null;
:: > try {
:: > 	items = upload.parseRequest(request, yourMaxMemorySize,
:: yourMaxRequestSize,
:: > yourTempDirectory);
:: > } catch (FileUploadException e) {
:: > 	//e.printStackTrace();
:: > 	//throw new IOException("could not be uploaded");
:: > 	out.write("le fichier ne peut pas être chargé : fichier trop
:: > volumineux<BR>");
:: > 	out.write("taille maximale autorisée : " + yourMaxRequestSize /
:: (1024 *
:: > 1024) + "Mo");
:: > 	return;
:: > }
:: >
:: > // Process the uploaded items
:: > Iterator iter = items.iterator();
:: > while (iter.hasNext())
:: > {
:: >     FileItem item = (FileItem) iter.next();
:: >
:: >     System.out.println("get item");
:: >
:: >     if (item.isFormField()) {
:: >     	out.write("<br />****** form field ********<br />");
:: >     	//out.write(item.getContentType());
:: >     	out.write(item.getFieldName());
:: >     	out.write(item.getString());
:: >     	if (item.getFieldName().equals("nbPiecesJointes"))
:: >     	{
:: >     		nbPiecesJointes =
Integer.parseInt(item.getString());
:: >     		nbPiecesJointes--;
:: >     		out.write("Modification nbPiecesJointes = " +
:: nbPiecesJointes);
:: >     	}
:: >     	if (item.getFieldName().equals("typeFile"))
:: >     	{
:: >     		int typeFile = -1;
:: >     		if (item.getString().equals(""))
:: >     		{
:: >     			out.write("ERREUR : aucun type choisi");
:: >     		}
:: >     		else
:: >     		{
:: >     			typeFile =
Integer.parseInt(item.getString());
:: >     			out.write("champ typeFile = " + typeFile);
:: >     		}
:: >     	}
:: >     	out.write("<br />****** /form field ********<br />");
:: >     } else {
:: >     	out.write("<br />****** file field ********<br />");
:: > 	    String fieldName = item.getFieldName();
:: > 	    String pathfileName = item.getName();
:: > 	    String fileName ;
:: > 	    String sPrompt ;
:: > 	    String contentType = item.getContentType();
:: > 	    boolean isInMemory = item.isInMemory();
:: > 	    long sizeInBytes = item.getSize();
:: >
:: > 	    String[] parts = pathfileName.split("[\\\\/]");
:: > 	    fileName = parts[parts.length-1];
:: >
:: > 	    sPrompt = "fieldName=" + fieldName + "<BR>"
:: > 		 + "fileName=" + fileName + "<BR>"
:: > 	    	 + "pathfileName=" + pathfileName + "<BR>"
:: > 	     	 + "contentType =" + contentType + "<BR>"
:: > 	    	 + "isInMemory =" + isInMemory + "<BR>"
:: > 	         + "sizeInBytes =" + sizeInBytes + "<BR>";
:: >
:: > 	    System.out.println(sPrompt);
:: > 	    out.write(sPrompt);
:: >
:: > 	    InputStream uploadedStream ;
:: >
:: > 	    String pathFileNameCrypted = "";
:: > 	    File uploadedFile = new File(yourTempDirectory + fileName);
:: > 	    //item.write(uploadedFile);
:: >
:: > 	    // écrit le fichier dans le repertoire temporaire
:: > 	    //uploadedStream = item.getInputStream();
:: > 	    item.write(uploadedFile );
:: > 	    item.delete();
:: > 		out.write("Fichier uploadé");
:: > 		/*
:: > 		FileWriter fw =  new FileWriter (uploadedFile );
:: > 	    fw.write(uploadedStream);
:: > 		fw.flush();
:: > 		fw.close();
:: > 		*/
:: >
:: > 		// chiffrer le fichier
:: > 		//pathFileNameCrypted = GnuPG.encrypt(fileName
:: ,yourTempDirectory ,
:: > "F5A1C6A7");
:: >
:: > 		//sPrompt = "fileName =" + fileName + "<BR>"
:: > 		//	+ "pathFileNameCrypted =" + pathFileNameCrypted +
:: "<BR>";
:: >
:: > 		//System.out.println(sPrompt);
:: > 		//out.write(sPrompt);
:: >
:: > 		// monter le fichier dans la base
:: > 		out.write("<br />****** /file field ********<br />");
:: >     }
:: > }
:: > %>
:: > <form name="upload" method="post" action="testUpload.jsp?nb=<%=
:: > nbPiecesJointes %>" >
:: > <input type="submit" value="Continuer" />
:: > </form>
:: > <%
:: > System.out.println("****** /upload.jsp *******");
:: > //response.sendRedirect("vide.html");
:: > %>
:: >
:: > So I am chaining the different scripts but I have a problem with the
chain
:: > since there is an exception when I attempt to upload big files ( but
size
:: <
:: > 8 Mo)
:: > For exemple I upload a file of 6787600 bytes with no problems but when
I
:: > want upload a file for the second loop I have an exception error with
the
:: > context. I don't understand the problem. I suspect a problem of
buffering
:: > but I don't know what is it...
:: >
:: > If someone could help me to fix my loop, I would be very interested...
:: >
:: > Thanks to all
:: >
:: > Florian Kiebel
:: > ---
:: > Outgoing mail is certified Virus Free.
:: > Checked by AVG anti-virus system (http://www.grisoft.com).
:: > Version: 6.0.691 / Virus Database: 452 - Release Date: 26/05/2004
:: >
:: >
:: >
:: > ---------------------------------------------------------------------
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:: >
:: >
:: 
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