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Problem sending images to browser

 
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kawalya



Joined: 07 Sep 2009
Posts: 12
PostPosted: Tue Apr 13, 2010 4:43 pm    Post subject: Problem sending images to browser Reply with quote
Hi folks,
I am having a little problem in Netbeans 6.5.

I am in the JSF managed bean;
I call
Code:
System.getProperties(“user.dir”)

to get the current working directory and get
Code:
/home/dk/glassfish-v2.1/domains/domain1/config


So I upload an image file and create a copy in the file system relative to the above ie
Code:
web/Images/myImage.jpg

Checking in the application server, the image actually exists on the above path.

So I store another copy of the image bytes, the above path, and other image parameters in the database.

I direct
Code:
<h:graphicImage>
to the above url to get the image.

Running the application, the image is not displayed, but an anchor thumbnail showing there is supposed to be an image on the page.

I click on the displayed thumbnail and choose properties to get the image location and get
Code:
location = http://localhost:8080/MyImages/faces/+/home/dk/glassfish-v2.1/domains/domain1/config/web/Images/myImage.jpg


I right click again and choose view image and get
Code:
   HTTP Status 404 -
type Status report
message
descriptionThe requested resource () is not available.
   Sun GlassFish Enterprise Server v2.1


So how do I then direct the system to find the image?

Any help will be appreciated.
Thanks.
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kawalya



Joined: 07 Sep 2009
Posts: 12
PostPosted: Thu Apr 15, 2010 12:11 pm    Post subject: Reply with quote
This was solved.
The problem was creating files in the application server as opposed to the project folder.
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kawalya



Joined: 07 Sep 2009
Posts: 12
PostPosted: Thu Apr 15, 2010 12:11 pm    Post subject: Reply with quote
This was solved.
The problem was creating files in the application server as opposed to the project directory.
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kawalya



Joined: 07 Sep 2009
Posts: 12
PostPosted: Wed Apr 28, 2010 4:11 pm    Post subject: Reply with quote
I think a better aproach is even using a servlet ie
The database entity POJO is as below
Code:

public class DavisContent implements Serializable {
    private static final long serialVersionUID = 1L;
    @Id
    @Basic(optional = false)
    @Column(name = "content_id")
    private String contentId;
    @Basic(optional = false)
    @Column(name = "content_type_id")
    private String contentTypeId;
    @Basic(optional = false)
    @Lob
    @Column(name = "content")
    private byte[] content;
      .
      .
}

Then the image loader servlet
Code:
private DavisContent davisContent = null;

    @PersistenceUnit(unitName = "DavisBlobsPU")
    private EntityManagerFactory emf = null;

    public EntityManager getEntityManager() {
        return emf.createEntityManager();
    }

    public DavisContent findDavisContent(String id) {
        EntityManager em = getEntityManager();
        try {
            return em.find(DavisContent.class, id);
        } finally {
            em.close();
        }
    }

 protected void processRequest(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
 //This is the parameter from the h:graphicImage tag
        String file = request.getParameter("file");        davisContent = findDavisContent(file);
       
        try {
            if(davisContent.getContentTypeId().contains("image")){
            response.getOutputStream().write(davisContent.getContent());
            }
        } finally {
            //out.close();
        }
    }

The servlet configuration in web.xml
Code:
<servlet>
        <servlet-name>ImageServlet</servlet-name>
        <servlet-class>dave.ImageServlet</servlet-class>
    </servlet>
<servlet-mapping>
        <servlet-name>ImageServlet</servlet-name>
        <url-pattern>/image/*</url-pattern>
    </servlet-mapping>

Then finally one of the columns in the h:dataTable
Code:

<h:column>
                            <f:facet name="header">
                                <h:outputText value="Content"/>
                            </f:facet>
                            <h:graphicImage height="50" width="40" value="/image?file=#{item.contentId}">
                                </h:graphicImage>
                        </h:column>
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