let me know once you are done and we will see where we are
-Igor
On 5/5/06, Vincent Jenks <
[EMAIL PROTECTED]> wrote:
Once I do, is this something that should be added to Wicket? Using the uploader for what I'm doing, which I'd imagine would be fairly common, sort of sucks w/o the other half of it....the ability to call those images from non-web folders.On 5/5/06, Igor Vaynberg < [EMAIL PROTECTED]> wrote:so what you need is something that maps to some url and when invoked streams the image back to the user.
i see two possible ways to do this
one:
use a separate servlet to do this
two:
use a wicket shared resource
in both approaches the code will be 90% identical
what you need is to somehow tell this servlet or wicket resource which file to stream, this is what you pass in as a parameter
ie: www.server.com/myimageservlet?4
this can tell the servlet that you want to stream c:\\app\\images\\img4.gif
same goes for the wicket resource
you have a resource reference which builds the url that will hit the resource ( urlfor(resourcerefence) ), but you still need to tell it which image you want served
so the entire process once you registered a resource and obtained a reference to it goes like this
<img wicket:id="img"/>
String url="" // base resource url
url="">
WebMarkupContainer img=new WebMarkupContainer("img");
img.add(new SimpleAttributeModifier("src", "url");
or encapsulate this whole thing into a reusable component so you can just do
add(new StoredImage("img", imagenum));
-IgorOn 5/5/06, Vincent Jenks <[EMAIL PROTECTED] > wrote:Obviously not...or we wouldn't be having this conversation. It's a folder outside of the webroot.
I'd have a list of strings, basically, to the effect of:
C:\\app\\images\\img1.gif
C:\\app\\images\\img2.gif
C:\\app\\images\\img3.gif
C:\\app\\images\\img4.gif
I may just start storing them as blobs in the DB...they won't change often so I can cache them. I'm running short on time and starting to bite my nails! :DOn 5/5/06, Igor Vaynberg < [EMAIL PROTECTED]> wrote:hmm
is the static location accessible from the web?!?!?!?
-IgorOn 5/5/06, Vincent Jenks <[EMAIL PROTECTED] > wrote:I guess I'm still a little lost here. Why would I need to use a querystring to build the string? Do I? I'm thinking not.
I'm not generating thumbnails...my version of this is much, much, much smaller. I'm uploading images to a pre-defined, static location. That part works great, no problems there. I'm then pulling them from that static location to display them.
I know that static path on disk where the images are located and I know the name ahead of time (looping through a ListItem in a ListView from EJB3 entities in a List).
How is the id querystring param relevant? Can't I just pass the path + img_name.gif into the urlFor() and be done w/ it?
I'm probably just over-complicating this...On 5/5/06, Igor Vaynberg < [EMAIL PROTECTED]> wrote:this is already described in philip's wiki article under download image section
what you want is a stripped down version of the image resource:public class ImageResource extends DynamicWebResource
{
// CONSTANTS
public static final Log logger = LogFactory.getLog(ImageResource.class);
private static final long serialVersionUID = 1L;
// CONSTRUCTORS
public ImageResource(){then you register this as a shared resource and get a resource reference. then when you want to build a url for an image you do this
super();
}
public ImageResource(Locale local)
{
super(local);
}
// METHODS
// MEMBERS
@Override
protected ResourceState getResourceState()
{
ValueMap params = getParameters();
String imageId=params.get("id");
byte[] data="" style="color: rgb(255, 0, 0);">loadImageData(id);
Date lastModified=
getImageLastMod(id);
ImageResourceState state =
new ImageResourceState(Time.valueOf(lastModified));
state.setContentType
(imageEntry.getContentType
());
state.setData(imageService.getImage(imageEntry));
return state;
}
class ImageResourceState extends ResourceState
{
// CONSTRUCTORS
ImageResourceState(Time lastModified)
{
super();
this.lastModified = lastModified;
}
// MEMBERS
private String contentType;
@Override
public String getContentType()
{
return contentType;
}
void setContentType(String contentType)
{
this.contentType
= contentType;
}
private byte[] data;
@Override
public byte[] getData()
{
return data;
}
void setData(byte[] data)
{
this.data = ""> }
@Override
public int getLength()
{
return data.length;
}
private Time lastModified;
@Override
public Time lastModifiedTime()
{
return lastModified;
}
// METHODS
}
}
ResourceReference imageResource=...
String url="">
hope this clears it up some more.
-Igor
hope this clears it up some more.On 5/5/06, Vincent Jenks <[EMAIL PROTECTED]> wrote:Hi Philip,
Thanks so much for the sample code and wiki entry...it makes a lot of sense, however, it is a little bit of overkill for the app I built. You gave me a bazooka to take to a gun-fight!
Really, what it comes down to is; I need to turn the byte array I'm pulling out of the file system and turn it into an image. The upload I already had one of my devs build was working fine and I'm not sure (for now anyways) we need your full-on image service.
I'm googling around to see if I can figure out how to simply turn the byte array into an image I can display on a page...not something I'm familiar with. I couldn't gather from your example how this would be done, either.
Thanks for the help!On 5/2/06, Philip A. Chapman < [EMAIL PROTECTED]> wrote:How was it? Do I need to make any edits to make it easier to understand?
On Mon, 2006-05-01 at 11:28 -0600, Vincent Jenks wrote:
I'll read through this, thanks a ton!
On 5/1/06, Philip A. Chapman < [EMAIL PROTECTED]> wrote:Sorry for the delay, but I spent the time to create a wiki page so that hopefully others can benefit from what little I have to say on the subject:
http://www.wicket-wiki.org.uk/wiki/index.php/UploadDownload
On Mon, 2006-05-01 at 08:01 -0700, Igor Vaynberg wrote:
yes, thats it.
basically you would create a that resource that takes the filename/fileid/whatever off the url and streams the file. there is an example of this, i will ask one of my friends to post it here. stay tuned.
-Igor
On 5/1/06, Vincent Jenks < [EMAIL PROTECTED]> wrote:
Did you mean to say DynamicWebResource?
On 4/21/06, Johan Compagner <[EMAIL PROTECTED]> wrote:
> you could save those images to a DB or to a working dir on the server.
> Then have a DynamicByteArrayResource or the 1.2 one: WebDynamicResource to
> load the image from the location you stored the image.
>
> johan
>
>
> On 4/21/06, Steve Knight < [EMAIL PROTECTED]> wrote:
> >
> > I am creating a form that will allow users to upload image files that will
> be displayed on other pages. How should I go about uploading the images so
> that they can be used in Wicket Image components on the other pages? The
> upload part is not problem, I just don't know where I should put them.
> >
> > On my view pages, I am using ThumbnailImageResource which takes a
> WebResource in it's contructor to find the image. Where should I save the
> images to make this work?
> >
> > Thanks.
> >
> >
> > Steve
> >
> >
> >
>
>
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Philip A. Chapman
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Philip A. Chapman
Desktop and Web Application Development:
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Linux, Windows 2000, Windows XP
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