CODEWITHSUNDEEP
azureazure-functionsazure-logic-apps
Chris Harrington
Chris Harrington

Reputation: 1326

Why can't send queue message text to an Azure Function?

I have an Azure Logic App with a queue trigger. The queue message is JSON. When I send "Message text" to an Azure function, I get 

UnsupportedMediaType
{
  "Message": "The WebHook request must contain an entity body formatted as JSON."
}

I'd assumed this would work directly.I tried setting request body to 

@{json(<Message text>)}

where is the select dynamic content item, but I get red message "Enter a valid json".

What's the trick to making this connection? Do I have to pass in and then parse out "Message text" in my function? Again, I assumed it would do that automagically.

Upvotes: 0

Views: 1107

Answers (2)

granadaCoder
granadaCoder

Reputation: 27852

For future readers.

I was passing some (what seems to be to be valid) json to my webhook.

And kept getting the

"Message": "The WebHook request must contain an entity body formatted as JSON."

error.

:(

Finally, I found a json "expression" that did its voodoo and got rid of the error. I argument from the json-expression was my previous action's output, which was valid json. It apparently needs just a little help!

enter image description here

The raw (non designer) code was:

        "GenericWebHookCsharpOne": {
          "type": "Function",
          "inputs": {
            "body": "@json( body('MyPreviousAppLogicActionWhichIsAnAzureFunction'))",
            "method": "POST",
            "function": {
              "id": "/xxxxxxxxxxxxxxxxxxxxxxxx
            }

Upvotes: 0

Szymon Wylezol
Szymon Wylezol

Reputation: 1466

The @{} syntax indicates string interpolation. This means that your expression @{json(<Message text>)} de-serializes the message text to json, and then serializes it again.

Hence the expression that you want to use is

@json(<Message text>)

Upvotes: 1

Related Questions