How to preview PDF file in jsf before upload

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I am trying to upload a pdf file in jsf but before upload I would wish to allow user to see preview of the pdf before hitting submit button but its failing and giving this error in console

org.primefaces.application.resource.StreamedContentHandler.handle Error in streaming dynamic resource. Stream Closed

here is my xhtml code

<?xml version='1.0' encoding='UTF-8' ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:h="http://xmlns.jcp.org/jsf/html"
      xmlns:f="http://xmlns.jcp.org/jsf/core"
   
      xmlns:p="http://primefaces.org/ui">
    <h:head>
        <title>Facelet Title</title>
        <style>
            *{
                margin: 0px;
                padding:0px;
            }
            #pdf_div{
                height: 100%;
                width: 100%;
            }
         

            .ui-widget-content{
                margin-top: 0px;
            }
         

        </style>
    </h:head>
    <h:body>
        <h2>Internalization Language Example</h2>
      
     
        <h:form enctype="multipart/form-data" id="submit_form">
            <p:messages closable="true"/>
            <div id="upload-button">
                <p>Browse</p>
                
               <h:inputFile   value="#{userData.image}">
                    <f:passThroughAttribute name="accept" value="*.pdf"/>
                    <f:ajax event="change"  listener="#{userData.load_stream_Content}"  render=":pdf_preview"/>
                </h:inputFile>
                
               
            </div>
            <p:commandButton ajax="false" update="submit_form" value="Upload" action="#{userData.doUpload()}">
             
             </p:commandButton>
        </h:form>
        
    
       
        
      
        <p:outputPanel id="pdf_preview" >
             <p:media   width="100%" height="700px" value="#{userData.streamedContent}"
            cache="false" player="pdf"/>
        </p:outputPanel>
       

        
    </h:body>
</html>

and here is my managed bean

Java

//imports

@ManagedBean(name = "userData", eager = true)
@SessionScoped
public class UploadController implements Serializable {

  

    public UploadController() {
    }
    
    StreamedContent streamedContent;
	private InputStream inputStream;

    public void load_stream_Content() throws Exception {
        inputStream=image.getInputStream();
      //  String fileName = image.getSubmittedFileName();
        FacesContext context = FacesContext.getCurrentInstance();

        if (context.getCurrentPhaseId() == PhaseId.RENDER_RESPONSE) {
     
            streamedContent = new DefaultStreamedContent();
        } else {
              streamed = true;
          String fs = Paths.get(image.getSubmittedFileName()).getFileName().toString(); 
         
     
            streamedContent=new DefaultStreamedContent(inputStream, "application/pdf", fs);
            
           
        }
        streamed = true;
    }



   

    public StreamedContent getStreamedContent() {
        return streamedContent;
    }

    public void setStreamedContent(StreamedContent streamedContent) {
        this.streamedContent = streamedContent;
    }

    //getter setter
    private Part image;
    private boolean upladed;
	    boolean streamed = false;
	
	

 
}

What I have tried:

I need to show a pdf preview before upload. I have tried the code in the question and gives the error shown.

Posted 25-Feb-21 1:53am

Member 13723368

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