How to consume HTTP POST service/API?

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I have an external service that offers a HTTP POST API. One method returns an HTML, the other a (PDF or other) document. How can I call these from Mendix and especially how can I use the result - either a document to save or to download or an HTML-page to show to the user or to redirect to? NB: I am aware of the mendix 5 RestServices-module and the mendix 6 native REST-support, but I am not sure whether I use it right as I get a 302-response which neither can handle.
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2 answers
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I think your struggle is that the service is returning a browser instruction (302 - redirect), while the Mendix RestServices and native REST support are both run server-side, not in the client's browser.

You have 2 options:

  • find a way to perform this POST on the client side (possible via the HTMLSnippet widget or a custom widget)
  • adjust the RestServices Java code to handle a 302 and download the HTML or PDF file to a location on your Mendix server where you can then serve it back up to your client's browser.
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Currently we don't support binary result. However, the exportStream API returns an inputstream, so you can store the result in FileDocument. This requires some Java Action works though.

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