Invoke Azure REST API with curl

Invoke Azure REST API with curl

To call a REST API, Authorization header is needed authorize the request.

Method 1: Acquire token from resources.azure.com (Easiest)

Visit https://resources.azure.com/api/token?plaintext=true and copy the token. This token is issued for the user that signed in, and is the same as Azure Portal token.

Method 2: Acquire token from Azure Portal

For temporary usage, the easiest way is to get the token from Azure Portal - In Developer Tools, find requests like invoke and find the Authorization header in the request.

Method 3: Acquire token using Service Principal

Create Service Principal in Azure Portal and assign it permissions, then get token with curl.

Invoke REST API

Put the Authorization header in the request and call curl. For example,

Application Gateways - Get:

curl "GET https://management.azure.com/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.Network/applicationGateways/{applicationGatewayName}?api-version=2021-03-01" -H "Authorization:Bearer eyJ0eX..." -H "Content-Type:application/json" -o output.json -D - -s

It saves the response to output.json. Then we can do some changes and PUT it back.

Application Gateways - Create Or Update:

curl -X PUT "PUT https://management.azure.com/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.Network/applicationGateways/{applicationGatewayName}?api-version=2021-03-01" -H "Authorization:Bearer eyJ0eX..." -H "Content-Type:application/json" -d "@output.json" -D - -s

Parameters:

-D -: Dump headers to stdout(-)
-s  : Silently, do not show the percentage progress (0%, 1%, ...)

Note: If the token is too long, exceeding the limit of a console command, use Postman or Fiddler instead.