Upload Component - File Not Found

Vaadin 6 / 7 / 8
1

Using the upload Component I receive a java.io.FileNotFoundException when trying to create a new FileOutputStream. I have created the file just beforehand and the path to the file is correct.

[code]
@Override
public OutputStream receiveUpload(String filename, String mimeType) {

    FileOutputStream fos = null;

    String basepath = VaadinService.getCurrent().getBaseDirectory().getAbsolutePath();
    
    
        
        file = new File(basepath + "/WebContent/WEB-INF/images/" + filename);

        try{
            fos = new FileOutputStream(file);
        } catch (final IOException e){
            e.printStackTrace();
        return null;
    }
    
    
    return fos;
}

[/code]stacktrace from attempting to upload a png image:

java.io.FileNotFoundException: C:\Java\Workspace\Bleeding Edge.metadata.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\CallSystem\WebContent\WEB-INF\images\twit_400x400.png (The system cannot find the path specified)
at java.io.FileOutputStream.open(Native Method)
at java.io.FileOutputStream.(FileOutputStream.java:194)
at java.io.FileOutputStream.(FileOutputStream.java:145)
at com.callsystem.UI.newCustomerCallView.receiveUpload(newCustomerCallView.java:279)
at com.vaadin.ui.Upload$2.getOutputStream(Upload.java:1139)
at com.vaadin.server.communication.FileUploadHandler.streamToReceiver(FileUploadHandler.java:547)
at com.vaadin.server.communication.FileUploadHandler.handleFileUploadValidationAndData(FileUploadHandler.java:456)
at com.vaadin.server.communication.FileUploadHandler.doHandleSimpleMultipartFileUpload(FileUploadHandler.java:403)
at com.vaadin.server.communication.FileUploadHandler.handleRequest(FileUploadHandler.java:285)
at com.vaadin.server.VaadinService.handleRequest(VaadinService.java:1409)
at com.vaadin.server.VaadinServlet.service(VaadinServlet.java:364)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1041)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:603)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
at java.lang.Thread.run(Thread.java:662)
08-Aug-2016 10:41:58 com.vaadin.server.DefaultErrorHandler doDefault
SEVERE:
com.vaadin.server.UploadException: Upload failed
at com.vaadin.server.communication.FileUploadHandler.streamToReceiver(FileUploadHandler.java:627)
at com.vaadin.server.communication.FileUploadHandler.handleFileUploadValidationAndData(FileUploadHandler.java:456)
at com.vaadin.server.communication.FileUploadHandler.doHandleSimpleMultipartFileUpload(FileUploadHandler.java:403)
at com.vaadin.server.communication.FileUploadHandler.handleRequest(FileUploadHandler.java:285)
at com.vaadin.server.VaadinService.handleRequest(VaadinService.java:1409)
at com.vaadin.server.VaadinServlet.service(VaadinServlet.java:364)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1041)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:603)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
at java.lang.Thread.run(Thread.java:662)
Caused by: com.vaadin.server.NoOutputStreamException
at com.vaadin.server.communication.FileUploadHandler.streamToReceiver(FileUploadHandler.java:555)
… 22 more

2

Are you sure WebContent part is corret in your path? WebContent seem like a eclipse project folder.
What happens if you try without WebContent?

file = new File(basepath + "/WEB-INF/images/" + filename)

HTH
Marco

3

Hello,

What about creating file before writing into it :

file.createNewFile();

Btw, is this by design that you write onto your webapp dir ?

Regards

4

WebContent is definitely part of my project folder.
file.createNewFile() produces a java.io.IOException: The system cannot find the path specified.
I am storing the file here temporarily and displaying the uploaded image to the user before storing the image permenantly to a database.

5

If it is a temporary you can use File.createTempFile(…)

6

Thank you I will try this now

7

Uploading to a temporary file fails on a java.lang.ArrayIndexOutOfBoundsException : 0
However I can upload directly to the basepath, so i may do this and just delete the file afterwards.

Thank you anyway.

8

A temp file outside your webapp would be better IMHO.

Best regards
Marco