Adding the SDK Binding Support for Storage Blob

[swapnil-nagar]

This pull request introduces support for SDK binding for Azure Storage Blob in the Azure Functions Node.js library. Key changes include adding a new boolean property, deferredBinding, which allows users to enable deferred binding for storage blobs. When deferredBinding is enabled, the StorageBlobClient is returned to the user, which contains both the blobClient and containerClient, providing enhanced functionality for interacting with blob storage.

Example

app.storageBlob("storageBlobTrigger", {
  path: "snippets/{name}",
  connection: "SwapnilUserMiTest",
  deferredBinding: true,
  handler: storageBlobTrigger1,
});

export async function storageBlobTrigger1(
  blobStorageClient: StorageBlobClient,
  context: InvocationContext
): Promise<void> {
  context.log(
    `Storage blob function processed blob "${context.triggerMetadata.name}"`
  );
  try {
    // Download the blob content
    const downloadBlockBlobResponse =
      await blobStorageClient.blobClient.download();

    context.log("Contemt: ", downloadBlockBlobResponse );
  } catch (error) {
    console.error("Error downloading blob content:", error.message);
    throw error;
  }
  context.log("Storage blob trigger function executed successfully!");
}

Definition of StorageBlobClient

{
    /**
     * Blob client to be used by this blob input or output. This is the client that will be used to perform operations on the blob storage.
     */
    blobClient: BlobClient;

    /**
     * Container client to be used by this blob input or output. This is the client that will be used to perform operations on the container storage.
     */
    conatinerClient: ContainerClient;
}