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Posted to users@tapestry.apache.org by "Angelo C." <an...@gmail.com> on 2012/08/23 16:04:07 UTC
StreamResponse for small cacheable images
Hi,
I have some very small jpegs that are kept in the file system, what is the
right method to render them to client and it can also be cached in the
browser? I'm looking at StreamResponse, is it the right way to go? Thanks,
Angelo
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Re: StreamResponse for small cacheable images
Posted by "Angelo C." <an...@gmail.com>.
it's not static, but some small photos that are kept just for a short time.
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Re: StreamResponse for small cacheable images
Posted by Lance Java <la...@googlemail.com>.
If the images are static and you can build them into the jar or war, I'd
avoid using StreamResponse and instead use the "asset:" or "context:"
binding prefixes.
For jpegs on the classpath
${asset:path/to/image.jpg}
For jpegs in the web context
${context:path/to/image.jpg
http://tapestry.apache.org/assets.html
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Re: StreamResponse for small cacheable images
Posted by Lance Java <la...@googlemail.com>.
Use a separate page to generate the images and generate Links to the page.
For the page, onActivate(String image) returns the StreamResponse.
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Re: StreamResponse for small cacheable images
Posted by "Angelo C." <an...@gmail.com>.
that works, thanks.
the component approach generates different urls for the same photo depending
on which page the component is used, maybe some other approach that can
create a unique url regardless pages?
http://localhost:8080/test123.memimg:image/image1
http://localhost:8080/testxyz.memimg:image/image1
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Re: StreamResponse for small cacheable images
Posted by Lance Java <la...@googlemail.com>.
If you want the image name as a parameter
Link getImage(String imageName) {
return resources.createEventLink("Image", imageName);
}
private StreamResponse onImage(String imageName) {
return new ImageResponse(imageName);
}
If you want to cache the image, you will need to set the appropriate
response headers in ImageResponse.prepareResponse(Response)
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Re: StreamResponse for small cacheable images
Posted by "Angelo C." <an...@gmail.com>.
here is the code I'm trying to come out, ImageResponse derived from
StreamResponse, the issue now is, the img url is always the same for every
photo:
http://localhost:8080/test123.memimg:image
tml:
< img t:type="MemImg" image_name='literal:image1' / >
java:
@SupportsInformalParameters
public class MemImg {
@Inject
private ComponentResources resources;
@Inject
private Response response;
@Parameter(required = true)
private String image_name;
boolean beginRender(MarkupWriter writer) {
writer.element("img", "src", getImage());
resources.renderInformalParameters(writer);
writer.end();
return false;
}
Link getImage() {
return resources.createEventLink("Image");
}
private StreamResponse onImage() {
return new ImageResponse(image_name);
}
}
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Re: StreamResponse for small cacheable images
Posted by Thiago H de Paula Figueiredo <th...@gmail.com>.
On Thu, 23 Aug 2012 11:04:07 -0300, Angelo C. <an...@gmail.com>
wrote:
> Hi,
Hi!
> I have some very small jpegs that are kept in the file system, what is
> the right method to render them to client and it can also be cached in
> the
> browser? I'm looking at StreamResponse, is it the right way to go?
Yes.
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Thiago H. de Paula Figueiredo
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