Azure | Creating Azure Logic Apps to integrate workflows for sending notifications about changes within a Blob Storage container

Azure Logic Apps is a cloud service that allows you to automate workflows by integrating various apps, data, and services. It provides a visual designer to build workflows without writing code.

Note
I highlighted screenshots with a yellow color to focus on some important informations.

Scenario

Let’s consider a scenario where you want to automate the process of sending an email notification whenever a new file is uploaded to a specific folder in Azure Blob Storage.

Steps to Create the Logic App

1. Create a Logic App

• Go to the Azure Portal and create a new Logic App resource.
• Choose a name, subscription, resource group, and region.
• Click “Review + Create” and then “Create”.

After a few seconds, we will receive a message confirming that the deployment was successfully completed.

2. Trigger: When a New File is Added (Blob Storage)

• In the Logic App Designer, search for and select the “When a new blob is added or modified (properties only)” trigger.
• Sign in with your Azure account and select the Azure Blob Storage account and container where files will be uploaded.
• Optionally, specify a prefix filter if you want to monitor files in a specific folder : lab-container.

Important
For further information on how we created the blob storage and uploaded the files within the container, please refer to the following post : Creating an Azure Storage Account and Uploading Files to a Container.

3. Action: Send an Email (Office 365 Outlook)

• Add a new step after the trigger.
• Search for and select the “Send an email (V2)” action.
• Sign in with your Office 365 Outlook account.
• Enter the recipient’s email address, subject, and body.
  • You can use dynamic content from the trigger (e.g., filename, file URL) in the email body.

4. Save and Test

• Click “Save” to save your Logic App.
• Upload a new file to the blob storage.

• Click “Run” to manually trigger the Logic App and test it.

• You will receive a notification email about the newly uploaded file.

Caution
To allow your Logic App access to your blob storage, you should create a new role assignment with “Storage Blob Data Reader privileges”. The configuration shoud be done on the Blob storage side.

Example Logic App Definition code

Below is an example of a the Logic App workflow definition code that I created :

{
  "definition": {
    "$schema": "https://schema.management.azure.com/providers/Microsoft.Logic/schemas/2016-06-01/workflowdefinition.json#",
    "contentVersion": "1.0.0.0",
    "triggers": {
      "Quand_un_objet_blob_est_ajouté_ou_modifié_(propriétés_uniquement)_(V2)": {
        "type": "ApiConnection",
        "inputs": {
          "host": {
            "connection": {
              "name": "@parameters('$connections')['azureblob-1']['connectionId']"
            }
          },
          "method": "get",
          "path": "/v2/datasets/@{encodeURIComponent(encodeURIComponent('hbolajraf00storage'))}/triggers/batch/onupdatedfile",
          "queries": {
            "folderId": "JTJmbGFiLWNvbnRhaW5lcg==",
            "maxFileCount": 10,
            "checkBothCreatedAndModifiedDateTime": false
          }
        },
        "recurrence": {
          "interval": 1,
          "frequency": "Day"
        },
        "conditions": [],
        "splitOn": "@triggerBody()",
        "metadata": {
          "JTJmbGFiLWNvbnRhaW5lcg==": "/lab-container"
        }
      }
    },
    "actions": {
      "Envoyer_un_e-mail_(V2)": {
        "type": "ApiConnection",
        "inputs": {
          "host": {
            "connection": {
              "name": "@parameters('$connections')['outlook']['connectionId']"
            }
          },
          "method": "post",
          "body": {
            "To": "hassan.bolajraf@gmail.com",
            "Subject": "New File was Uploaded",
            "Body": "<p>Hello,<br><br>A new file $$filename was uploaded within the Blob storage : hbolajraf00storage.<br><br>Regards<br>Hassan BOLAJRAF</p>",
            "Importance": "Normal"
          },
          "path": "/v2/Mail"
        },
        "runAfter": {}
      }
    },
    "outputs": {},
    "parameters": {
      "$connections": {
        "type": "Object",
        "defaultValue": {}
      }
    }
  },
  "parameters": {
    "$connections": {
      "value": {
        "azureblob-1": {
          "id": "/subscriptions/4928c257-de8f-44ad-8242-55d442f71cae/providers/Microsoft.Web/locations/centralus/managedApis/azureblob",
          "connectionId": "/subscriptions/4928c257-de8f-44ad-8242-55d442f71cae/resourceGroups/AzureLogicApp/providers/Microsoft.Web/connections/azureblob-1",
          "connectionName": "azureblob-1",
          "connectionProperties": {
            "authentication": {
              "type": "ManagedServiceIdentity"
            }
          }
        },
        "outlook": {
          "id": "/subscriptions/4928c257-de8f-44ad-8242-55d442f71cae/providers/Microsoft.Web/locations/centralus/managedApis/outlook",
          "connectionId": "/subscriptions/4928c257-de8f-44ad-8242-55d442f71cae/resourceGroups/AzureLogicApp/providers/Microsoft.Web/connections/outlook",
          "connectionName": "outlook"
        }
      }
    }
  }
}

Replace <recipient-email>, <folder-id>, <subscription-id>, and <resource-group> with appropriate values.

What next ?

Azure Logic Apps simplifies automation tasks by providing a user-friendly interface to create powerful workflows, connecting various services and applications seamlessly.