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I am using the HTTPCaller to interact with an API, for that I use the setting Multipart/ Form Data. This is the way another user got the Endpoint to work for them and I just always used it. This works pretty well, the API does what I want, the connection is stable, but there is one problem. Sometimes it takes a lot of time to configure the Multipart-part.

For some jobs I need to configure dozens of parameters, this leads to a lot of typing, proofreading, etc.

 

For this particular endpoint I don't just need to give parameters about the object I want to edit (some inspection), but also something like a table definition. The row (row_id) and the value, for each attribute of my dataset. Since this API endpoint doesn't like it when I send in null values as values, I need to run several configurations of the same HTTPCaller one that drops each variation of Null values in the dataset.

 

Now I was wondering if I could somehow build the whole statement about the rows and their values with something in FME and then send the whole unit to the endpoint. Something like the JSONtemplater. Then I could just set that workflow up once and reuse it for different data. The JSONtemplater didn't work work for me. But who knows, maybe because I configured the Json wrong. Everything this API returns to me is in JSONs, it would make sense if it accepted them also. I think I would already be helped if I could see what exactly the HTTPCaller sends to my endpoint.

 

I would really appreciate any help you can give me!

I don’t know the answer to your question - though I would be interested to find out the answer too - but I do know that you can turn on Log Debug under Tools > FME Options > Translation > Log Message Filter. If you do that, the log will show more information about what is being sent to/from the API. It may help you. Be aware that it might show some odd warnings and errors that are usually not important. Don’t worry about them.

 

 

Actually, maybe I can help. You see this post here? I make those automatically using FME. I use the JSONTemplater to create JSON content and then the HTTPCaller to post that content to the API. It looks like this:

 

The main dialog is the JSON template that I use. It looks odd, but it’s because I’m putting HTML into it and I have to use special characters to avoid errors. The dialog that I posted on top is from my HTTPCaller. I use “Specify Upload Body” and point to the attribute containing the JSON template.

What I’m unsure about is whether you can switch from multi-part upload to specify upload body. I’m just not sure if that’s possible in general or in your scenario in particular. If it is, then this might be a good solution.

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