Body transform problems and questions

[Martin]

Hi,
I’ve tried to answer your question below:

@gawonmi

When setting up a body transform and a URL Rewrite rule the body transformation is not executed. I am still getting the original API response.

Response transforms need to be targetted on the rewritten URL, not on the inbound one.

@gawonmi

Whenever I run a body transform on any request, as shown in your docs, all REST clients (Postman, various other REST clients) will stop processing the response. They simply output errors like “ERROR: Failed to contact server” (insomnia), Could not get any response (postman), etc. It’s like the connection just broke off for these clients. cURL, however, works just fine and gets the response without complaint. I compared the output in curl before and after the change,a long with status headers and they are identical. When I remove the body transform the response is recognized by all clients again.

Not sure what’s wrong here, we test with Postman all the time, body trnsforms only impact the body of the request and change the content size param, nothing more. Maybe you are responding with the wrong headers. Or the template is crashing, also likely.

@gawonmi

How does body transform handle non 200 responses with errors inside? The body transform template would not fit the content any more.

The body transform will just try to transform the returned body, regardless of status code

@gawonmi

I am not yet very versed in go template. Is it possible to walk through nested responses change the output of each item accordingly?

Not really, but you could look at the Hugo Go Template Primer, which is really quite good.

In your example, you may have a problem, since the inbound JSON object has no anchorable fields, so you can’t identify the list as a golang template variable (you might be able to use . (the main context dot), but you’d need to experiment.

Hope that helps!
Martin