Problem (BaseX 12) serializing a map with json:serialize() in combination with the http-client module
Hi everyone, I have found a problem when serializing a map to JSON. I use the following map as request body for the http-client: map { 'username' : "aaa", 'password' : "bbb", 'grant_type' : 'password' } => json:serialize() In 10.4 everything works fine. In 12.0 this now leads to an error when I send the request. (Response from service: <code type="number">400</code><message>Invalid json message received</message>) It seems that the request body is being escaped twice when interacting with the http client. If I omit json:serialize(), it works fine in BaseX 12. I would expect json:serialize() to recognize the map(*) data type and serialize it correctly. Best regards Andreas
btw: I found out that this leads directly to an exception. map { 'username' : "aaa", 'password' : "bbb", 'grant_type' : 'password' } => inspect:type()
Hello, it's me again. I can't actually find a way to transport a JSON as a request body except with a map, which obviously always has a json representation as well. My current workaround for my code base is to convert the serialized form back into a map using xquery:eval. let $requestBody := element { 'json' } { attribute { 'type' } { 'object' }, element { 'the' } { attribute { 'type' } { 'object' }, element { 'shit' } { attribute { 'type' } { 'object' }, element { 'is' } { attribute { 'type' } { 'array' }, element { '_' } { attribute { 'type' } { 'object' }, element { 'on' } { attribute { 'type' } { 'object' }, element { 'the' } { "steam" } } }, element { '_' } { attribute { 'type' } { 'object' }, element { 'what' } { attribute { 'type' } { 'object' }, element { 'the' } { "f..." } } } } } } } return $requestBody => json:serialize() => xquery:eval()
Hi Andreas, Thanks for your observations. A new snapshot is available, containing the fix for the copy expression [1]; an updated version for inspect:type will follow soon (this bug is only due to the generatation of the output for the InfoView panel). With regard to your third question: In a previous 11.x version of BaseX, the behavior of http:send-request was changed, making th explicite json:serialize call obsolete (it should have been better documented). Here’s one way to send XML JSON representations to the server with the current version: (: Query :) http:send-request( <http:request method='post'><http:body media-type='application/json'/></http:request>, 'http://localhost...', <json>a</json> ) (: RESTXQ endpoint :) declare %rest:path('test') %rest:POST('{$x}') function local:f($x) { }; Best, Christian [1] https://files.basex.org/releases/latest/ ________________________________ Von: Andreas Hengsbach <andreas.hengsbach@nexoma.de> Gesendet: Dienstag, 8. Juli 2025 14:52 An: basex-talk@mailman.uni-konstanz.de <basex-talk@mailman.uni-konstanz.de> Betreff: [basex-talk] Re: Problem (BaseX 12) serializing a map with json:serialize() in combination with the http-client module Hello, it's me again. I can't actually find a way to transport a JSON as a request body except with a map, which obviously always has a json representation as well. My current workaround for my code base is to convert the serialized form back into a map using xquery:eval. let $requestBody := element { 'json' } { attribute { 'type' } { 'object' }, element { 'the' } { attribute { 'type' } { 'object' }, element { 'shit' } { attribute { 'type' } { 'object' }, element { 'is' } { attribute { 'type' } { 'array' }, element { '_' } { attribute { 'type' } { 'object' }, element { 'on' } { attribute { 'type' } { 'object' }, element { 'the' } { "steam" } } }, element { '_' } { attribute { 'type' } { 'object' }, element { 'what' } { attribute { 'type' } { 'object' }, element { 'the' } { "f..." } } } } } } } return $requestBody => json:serialize() => xquery:eval()
Oh boy... I could have had that quicker. I never tried to put it non-serialized in the request-body and was convinced that it had something to do with the new construction of maps. But I would actually consider that a groundbreaking change, because if the request-body receives already serialized data, it arrives incorrectly at the endpoint. You wrote that it could have been better documented. I have just searched in vain for a reference to these changes. I would like to suggest that this be included in the changelogs or displayed more prominently there. Anyway, thanks Christian for the clarification. It saves me a lot of trouble. Beste regards, Andreas
Hi Andreas, thank you for reporting this, too. It is now being handled by https://github.com/BaseXdb/basex/pull/2456 Best regards, Gunther
Gesendet: Dienstag, 8. Juli 2025 um 12:32 Von: "Andreas Hengsbach" <andreas.hengsbach@nexoma.de> An: basex-talk@mailman.uni-konstanz.de Betreff: [basex-talk] Re: Problem (BaseX 12) serializing a map with json:serialize() in combination with the http-client module
btw: I found out that this leads directly to an exception.
map { 'username' : "aaa", 'password' : "bbb", 'grant_type' : 'password' } => inspect:type()
participants (5)
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Andreas Hengsbach -
Andreas Hengsbach -
Andreas Hengsbach | nexoma
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Christian Grün -
Gunther Rademacher