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Re: [Exist-open] Multiple different serialization formats in a single xquery
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From: Peter S. <st...@ed...> - 2025-04-22 10:03:25
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Hi Sascha,
another way to dynamically set serialization options is via `response:stream($content as item()*, $serialization-options as xs:string) as empty-sequence()`.
"It directly streams its input to the servlet's output stream. It should thus be the last statement in the XQuery.“ (XQuery Function Documentation)
Cheers
Peter
> Am 22.04.2025 um 07:15 schrieb Pieter Lamers <pie...@be...>:
>
> Hi Sascha,
>
> I think the problem is that you can serialize a snippet using fn:serialize but the whole response is serialized according to exist serialization settings. Apart from the declare options route in the prolog of your xquery, you can also set these inline via the following, e.g. util:declare-option("exist:serialize", "method=json")
>
> I think this will get you going.
>
> Best,
> Pieter
>
> On 17/04/2025 15:25, Sascha Grabsch via Exist-open wrote:
>> Dear list members,
>>
>> I'm trying to output different formats (XML and HTML5) from a single xquery script, but can't get it to work. Here is my test case:
>>
>> xquery version "3.1";
>> let $p_format := request:get-parameter("format", ())
>>
>> let $test :=
>> <html>
>> <head>
>> <title>Test Title</title>
>> </head>
>> <body>
>> <h1>Hello, World!</h1>
>> </body>
>> </html>
>>
>> return
>> if ($p_format = "tei-xml") then (serialize($test, map { "method": "xml" })) else (serialize($test, map { "method": "html" }))
>>
>>
>> However in both cases this does not work as expected:
>>
>> method:xml - The serialization option method:xml does not return valid XML, since the returned document is wrongly escaped (<html><head><title>Test Title</title></head><body><h1>Hello, World!</h1></body></html>). The content-type in the response header however is correct ("application/xml").
>>
>> method:html - While the serialization option method:html correctly adds a doctype for HTML5 (i. e. <!DOCTYPE html>), the actual response in a browser is wrongly escaped (as in <!DOCTYPE html>
>> <html><head><title>Test Title</title></head><body><h1>Hello, World!</h1></body></html>). Additionally the content-type in the response header is "application/xml" instead of "text/html".
>>
>>
>> According to <https://exist-db.org/exist/apps/doc/xquery.xml#fn-serialize> I would have expected to be able to return different serializations via fn:serialize, but it seems it is only possible to have one serialization per XQuery script via "declare option exist:serialize ..."?
>>
>> I would be glad about any information or hints what I might be missing.
>>
>> Thanks a lot!
>>
>> Sascha
>
> --
> Pieter Lamers
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