Ah, good to hear!
On Mon, Aug 8, 2011 at 5:52 AM, David Canteros
<davidcanteros....@gmail.com> wrote:
> Hi again Josh, i had not seen your first response, there was the solution to
> my problem.
> Thank you!
> David
>
>
>
> ------------------------------------------------------------------
> David Germán Canteros
>
>
> 2011/8/6 David Canteros <davidcanteros....@gmail.com>
>
>> Yes, user is an object loaded in the setupRender() method, and getImage()
>> returns an InputStream every time the page is loaded.
>>
>>
>> ------------------------------------------------------------------
>> David Germán Canteros
>>
>>
>> 2011/8/5 Josh Canfield <joshcanfi...@gmail.com>
>>
>>> The real issue is more likely the first point, you're getting your
>>> InputStream from an object from the session. Does calling getImage()
>>> return a new InputStream every time?
>>>
>>> On Fri, Aug 5, 2011 at 2:44 PM, David Canteros
>>> <davidcanteros....@gmail.com> wrote:
>>> > Hi Josh;
>>> > I have already tried with PageRenderLinkSource but It has the
>>> > same behavior. I did not know the difference between LinkSource and
>>> > PageRenderLinkSource, thanks for the information!
>>> >
>>> > David
>>> >
>>> > ------------------------------------------------------------------
>>> > David Germán Canteros
>>> >
>>> >
>>> > 2011/8/5 Josh Canfield <joshcanfi...@gmail.com>
>>> >
>>> >> Also.
>>> >> > private LinkSource linkSource;
>>> >>
>>> >> This is an internal class, you should be using PageRenderLinkSource.
>>> >> You can replace:
>>> >>
>>> >> >
>>> linkSource.createPageRenderLink(DisplayImagePage.class.getSimpleName(),
>>> >> false, new Object[]{imageId});
>>> >>
>>> >> with
>>> >>
>>> >>
>>> >>
>>> pageRenderLinkSource.createPageRenderLinkWithContext(DisplayImagePage.class,
>>> >> imageId);
>>> >>
>>> >> Josh
>>> >>
>>> >> On Fri, Aug 5, 2011 at 1:39 PM, David Canteros
>>> >> <davidcanteros....@gmail.com> wrote:
>>> >> > Hi
>>> >> > I have to show a image loaded from database BLOB field. I implemented
>>> >> > Thiago's suggestion, I have created a page with the following code:
>>> >> >
>>> >> > public class ShowImagePage {
>>> >> >
>>> >> > @Inject
>>> >> > private LinkSource linkSource;
>>> >> > (...)
>>> >> >
>>> >> > public Link *getUploadedFile*(String imageId) {
>>> >> > return
>>> >> >
>>> linkSource.createPageRenderLink(DisplayImagePage.class.getSimpleName(),
>>> >> > false, new Object[]{imageId});
>>> >> > }
>>> >> >
>>> >> > public StreamResponse *onActivate*(String imageId) {
>>> >> > this.filename = imageId;
>>> >> > return new StreamResponse() {
>>> >> >
>>> >> > public String *getContentType*() {
>>> >> > return contentType;
>>> >> > }
>>> >> >
>>> >> > public InputStream *getStream*() throws IOException {
>>> >> > User user =
>>> >> > (User)_request.getSession(true).getAttribute("user");
>>> >> > return user.getImage();
>>> >> > }
>>> >> >
>>> >> > public void *prepareResponse*(Response response) {
>>> >> > response.setHeader("Content-Disposition", "inline;
>>> >> > filename=" + filename
>>> >> > + ((extension == null) ? "" : ("." +
>>> >> > extension)));
>>> >> > }
>>> >> > };
>>> >> > }
>>> >> > }
>>> >> > **
>>> >> > In the javacode of the page where i have to show the image, I
>>> injected
>>> >> the
>>> >> > above page and wrote this method
>>> >> >
>>> >> > public Link *getImageLink*(ImageId){
>>> >> > return showImagewPage.getUploadedFile(imageId);
>>> >> > }
>>> >> > and in html code I put this:
>>> >> >
>>> >> > <img src="${imageLInk}"/>
>>> >> >
>>> >> > It works fine, the image is showed but when I refresh the page (with
>>> F5),
>>> >> > the image dissapear. It behavior does not occur if I submit some form
>>> >> placed
>>> >> > in the same page that refresh the page too (the method
>>> "onSubmitFrom..."
>>> >> > returns "this" ). I have debugged the code and everything works fine,
>>> do
>>> >> you
>>> >> > have any idea about this behavior?
>>> >> >
>>> >> > Thanks!!
>>> >> >
>>> >> > ------------------------------------------------------------------
>>> >> > David Germán Canteros
>>> >> >
>>> >> >
>>> >> > 2011/3/11 Rich M <rich...@moremagic.com>
>>> >> >
>>> >> >> Thanks everyone for the responses so far, conceptually I think this
>>> is
>>> >> >> coming together for me.
>>> >> >>
>>> >> >> So, I'm glad the context path was not a good idea, it felt dirty
>>> from
>>> >> the
>>> >> >> beginning. Avoiding that, there are two main options: use the
>>> database
>>> >> to
>>> >> >> store/retrieve the images, or use a configured system folder from
>>> where
>>> >> I
>>> >> >> can load/save files with Java IO.
>>> >> >>
>>> >> >> Regardless of the option chosen there, the image file will be
>>> captured
>>> >> as
>>> >> >> an InputStream and returned as a StreamResponse in some form to a
>>> >> >> page/component.
>>> >> >>
>>> >> >> As far as linking the StreamResponse to an HTML IMG tag, I believe I
>>> >> >> understand the various options presented here.
>>> >> >>
>>> >> >> LLTYK suggests using an EventLink. I was looking through my code and
>>> >> found
>>> >> >> a Captcha implementation I have using a propertyExpression in the
>>> TML on
>>> >> the
>>> >> >> src attribute of <IMG> to reference a getImageLink function that
>>> returns
>>> >> >> ComponentResources.**createActionLink("image",null)**. Then there is
>>> an
>>> >> >> onImage() action handler method that returns a StreamResponse. I
>>> >> understand
>>> >> >> this is ActionLink and not EventLink, but I think the concept must
>>> be
>>> >> nearly
>>> >> >> identical.
>>> >> >>
>>> >> >> Alternately, Thiago is suggesting that instead of using
>>> >> ComponentResources
>>> >> >> to generate an ActionLink or EventLink, it may be easier to create a
>>> >> >> seperate Page that handles returning just a StreamResponse. In that
>>> case
>>> >> the
>>> >> >> EventLink can be replaced with a PageLink and using an activation
>>> >> context
>>> >> >> the ID for the Image can be passed to the Page so it can load the
>>> Image,
>>> >> >> build the StreamResponse, and return it.
>>> >> >>
>>> >> >> <30 minutes later> Okay, the PageLink works out, great! I can see
>>> the
>>> >> >> biggest issue I was having was setting up the src attribute for IMG
>>> >> >> correctly. I was stuck thinking it was either the URL to the context
>>> >> path or
>>> >> >> the StreamResponse itself, rather than a link to an event or page
>>> that
>>> >> >> returns the StreamResponse.
>>> >> >>
>>> >> >> Thanks,
>>> >> >> Rich
>>> >> >>
>>> >> >>
>>> >> >>
>>> >> >> On 03/11/2011 08:08 AM, Thiago H. de Paula Figueiredo wrote:
>>> >> >>
>>> >> >>> On Fri, 11 Mar 2011 09:24:35 -0300, LLTYK <ll...@mailinator.com>
>>> >> wrote:
>>> >> >>>
>>> >> >>> Nobody's mentioned createEventLink. That's where you get the image
>>> >> url,
>>> >> >>>> create an event link pointing to the event handler that returns
>>> the
>>> >> >>>> stream response.
>>> >> >>>>
>>> >> >>>
>>> >> >>> I haven't mentioned it because my preferred approach is to create a
>>> >> page
>>> >> >>> just for returning StreamResponses. It's more reusable, as it can
>>> be
>>> >> used to
>>> >> >>> serve images for any page, while an event must be only used inside
>>> a
>>> >> give
>>> >> >>> page.
>>> >> >>>
>>> >> >>>
>>> >> >>
>>> >> >>
>>> >>
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>>> >> >>
>>> >> >
>>> >>
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>>> >>
>>> >
>>>
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>>>
>>
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