| author | ms.service | ms.topic | ms.date | ms.author |
|---|---|---|---|---|
ggailey777 |
azure-functions |
include |
03/25/2020 |
glenga |
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Although a function can have only one trigger, it can have multiple input and output bindings, which let you connect to other Azure services and resources without writing custom integration code.
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You declare these bindings in the function.json file in your function folder. From the previous quickstart, your function.json file in the HttpExample folder contains two bindings in the bindings collection:
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:::code language="json" source="~/functions-quickstart-templates/Functions.Templates/Templates/HttpTrigger-JavaScript/function.json" range="2-18":::
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:::code language="json" source="~/functions-quickstart-templates/Functions.Templates/Templates/HttpTrigger-Python/function.json" range="2-18":::
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:::code language="json" source="~/functions-quickstart-templates/Functions.Templates/Templates/HttpTrigger-PowerShell/function.json" range="2-18":::
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Each binding has at least a type, a direction, and a name. In the example above, the first binding is of type httpTrigger with the direction in. For the in direction, name specifies the name of an input parameter that's sent to the function when invoked by the trigger.
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The second binding in the collection is named res. This http binding is an output binding (out) that is used to write the HTTP response.
To write to an Azure Storage queue from this function, add an out binding of type queue with the name msg, as shown in the code below:
:::code language="json" source="~/functions-docs-javascript/functions-add-output-binding-storage-queue-cli/HttpExample/function.json" range="3-26"::: ::: zone-end
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The second binding in the collection is of type http with the direction out, in which case the special name of $return indicates that this binding uses the function's return value rather than providing an input parameter.
To write to an Azure Storage queue from this function, add an out binding of type queue with the name msg, as shown in the code below:
:::code language="json" source="~/functions-docs-python/functions-add-output-binding-storage-queue-cli/HttpExample/function.json" range="3-26"::: ::: zone-end
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The second binding in the collection is named res. This http binding is an output binding (out) that is used to write the HTTP response.
To write to an Azure Storage queue from this function, add an out binding of type queue with the name msg, as shown in the code below:
:::code language="json" source="~/functions-docs-powershell/functions-add-output-binding-storage-queue-cli/HttpExample/function.json" range="3-26"::: ::: zone-end
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In this case, msg is given to the function as an output argument. For a queue type, you must also specify the name of the queue in queueName and provide the name of the Azure Storage connection (from local.settings.json) in connection.
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