Feature Request: Blob Binding (out): Set Metadata Properties Like CacheControl and ContentType

[ricklove]

It would be handy to be able to set metadata properties for Blobs like Cache-Control and Content-Type.

Known workarounds

It is required to use the SDK for creating blobs that require custom metadata property values.

Related information

Perhaps a "propeties" value could be added to the json for out blob.

To Set the Value Statically with Functions.json

{
    "name": "outputBlob",
    "type": "blob",
    "direction": "out",
    "path": "{container}/{blob}",
    "connection": "AZURE_STORAGE_CONNECTION_STRING",
    "properties": {
        "cacheControl": "public, max-age 86400",
        "contentType": "application/json",
        "contentEncoding": "gzip"
    }
}

To Set the Value at Runtime:

context.bindings.outputBlob = {data: '...'};
context.bindingsMetadata.outputBlob.properties = {contentType:'application/json'}; 

[christopheranderson]

This needs a partner issue on the Blob Storage Binding in SDK to expose this feature on the binding.