Api Gateway : Action is returning result - looks like Operation can't passThrough

[marifrahman]

I have a api gateway created for Bard - looks like Action is returning the result. However, when I access the Operation endpoint from POSTMAN I get an error:
Error: Parse Error: Invalid character in chunk size

My Action looks like this :

And the Operation looks like this:

Any idea what's going on ? Anything to with the header from the external api vs api from fusio ? Anyway to debug ?

[chriskapp]

Hi @marifrahman could you manually call the endpoint and show me the complete HTTP response header and body maybe this is an error which gets returned by the endpoint and Fusio tries to JSON decode this response.

[marifrahman]

Much appreciated your response @chriskapp.
Here is the response of the manual call for the endpoint from POSTMAN :

Response body :
{ "candidates": [ { "output": "Fine.", "safetyRatings": [ { "category": "HARM_CATEGORY_DEROGATORY", "probability": "NEGLIGIBLE" }, { "category": "HARM_CATEGORY_TOXICITY", "probability": "NEGLIGIBLE" }, { "category": "HARM_CATEGORY_VIOLENCE", "probability": "NEGLIGIBLE" }, { "category": "HARM_CATEGORY_SEXUAL", "probability": "NEGLIGIBLE" }, { "category": "HARM_CATEGORY_MEDICAL", "probability": "NEGLIGIBLE" }, { "category": "HARM_CATEGORY_DANGEROUS", "probability": "NEGLIGIBLE" } ] } ] }
Response header:

From the Action designer when I execute - I get the result from there as well :

So I am assuming something to do in my Operation where the result from the endpoint is be passThrough ?

[marifrahman]

Hi,
Just checking on it again - if anyone got any clue on this issue ? Is there anything to do with the delay on the webservice ?

[chriskapp]

@marifrahman ok I think I understand the problem, it is probably because the API returns the response with a "Transfer-Encoding" header set to "chunked". To test this, could you change the file vendor/fusio/adapter-http/src/Action/HttpSenderAbstract.php with the following fix s.

[marifrahman]

Awesome that is the case. Should be a fix then ?

On another note: it looks like when passThru is used for incoming schema - looks like parameters set at the operations are Not passed to the action but only the parameters coming from the client. Is this the case or not sure if I am doing something wrong !

[chriskapp]

ok, great the fix regarding Transfer-Encoding will be included in the next release. Regarding your last point, the field where you have provided the actual value is a "description" field, there you can only describe the parameter, this description is then also used at the OpenAPI specification, so it is not the place where you can provide an actual value. But at the "bardProxy" action it should be possible to provide a default parameter value, depending on the action which you use.

[marifrahman]

Got it. Thanks again.
I am using HTTP-Processor action and trying to pass the parameter as part of uri as bellow; doesn't work.

However, from Action designer when I call it with parameter set - it does work !!

[chriskapp]

ok, providing the query parameters in the url will indeed not work, there is a new "Query" config option at the latest HTTP Processor action s. https://github.com/apioo/fusio-adapter-http/blob/master/src/Action/HttpProcessor.php#L67
which will be available in the next version. If you want to test this you could run

composer update fusio/adapter-http

to get the latest version of the HTTP adapter, since the version is already released, otherwise you can of course also wait for the next release, which should be available soon.