how to use a CInclude template to include resources

[Norman Barker <no...@comsine.co.uk>]

Hi,
 
I am rephrasing this to be clearer, thanks Derek.

I have set up several pipelines and readers within cocoon.
I can include XML content without any problems using a CInclude template,
as in the following example (not the real code, just dummy names).

<data xmlns:cinclude="http://apache.org/cocoon/include/1.0">
    <MyCollection1>
        <cinclude:include src="cocoon:/test1" element="data1"/>
    </MyCollection1>
    <MyCollection2>
        <cinclude:include src="cocoon:/test2" element="data2"/>
    </MyCollection2>
</data>

so cocoon:/test1 returns XML and this fits in nicely.

however when I want to include image content within the template I would 
like to
do either of the two things below as in the case of cocoon:/test2 being 
a reader;

1) Save the image returned from the reader in a temporary location that 
is cleaned
by Cocoon after the request and a URL to this resouces is stored in the 
XML (an
example of this would help me alot)

2) store a BaseBinary64 version of this image in the XML, or just the 
pixel values

Finally, is I post an XML document to Cocoon which looks like for example
<root>
   <request1>...</request1>
    <request2>...<request2>
</root>

is there a generator that will iterate over this document and make each 
of the requests, or do
I have to write a custom generator? I don't expect the user to make 
multiple requests to the
server, just to wrap up all the requests in one go and send them to the 
server.  So can I iterate
over this?

Any help would be gratefully appreciated.

Norman

-- 
Norman Barker
Software Engineer
ComSine Ltd
Tel: +44 (0)1483 457121
Web: http://www.comsine.com
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Re: how to use a CInclude template to include resources

[Jorg Heymans <jh...@domek.be>]

Norman Barker wrote:

> Hi,
> 
> I am rephrasing this to be clearer, thanks Derek.
> 
> I have set up several pipelines and readers within cocoon.
> I can include XML content without any problems using a CInclude template,
> as in the following example (not the real code, just dummy names).
> 
> <data xmlns:cinclude="http://apache.org/cocoon/include/1.0">
>    <MyCollection1>
>        <cinclude:include src="cocoon:/test1" element="data1"/>
>    </MyCollection1>
>    <MyCollection2>
>        <cinclude:include src="cocoon:/test2" element="data2"/>
>    </MyCollection2>
> </data>
> 
> so cocoon:/test1 returns XML and this fits in nicely.
> 
> however when I want to include image content within the template I would 
> like to
> do either of the two things below as in the case of cocoon:/test2 being 
> a reader;
> 
> 1) Save the image returned from the reader in a temporary location that 
> is cleaned
> by Cocoon after the request and a URL to this resouces is stored in the 
> XML (an
> example of this would help me alot)
This sounds like something flow could do.
so you cinclude:include src="cocoon:/pipelineWithMyFlowFunction" instead 
of cocoon:/test1.
In this flow function you generate your image and write it to a 
temporary file (using processPipelineTo), you then return your file 
identifier so it gets included in the document.


> 
> 2) store a BaseBinary64 version of this image in the XML, or just the 
> pixel values
modify your reader to spit out base64 seems the easiest thing to do here.

> 
> Finally, is I post an XML document to Cocoon which looks like for example
> <root>
>   <request1>...</request1>
>    <request2>...<request2>
> </root>
> 
> is there a generator that will iterate over this document and make each 
> of the requests, or do
> I have to write a custom generator? I don't expect the user to make 
> multiple requests to the
> server, just to wrap up all the requests in one go and send them to the 
> server.  So can I iterate
> over this?
If this iteration definition needs to come from the outside world then 
you could write an xsl that transforms
<root>
   <req1></req1>
   <req2></req2>
...
into
<mycollection>
   <cinclude:include src="the contents of element req1"/>
   <cinclude:include src=cocoon:/"the contents of element req2"/>
</mycollection>
and then have the cinclude transform do it's work.


HTH
Jorg


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