Routing in Azure Functions using python

Question

I know that I can use query parameters in Azure functions to get the values

"myfunction?p=one&p2=two"

I am referring to this question

How can I do Routing in Azure Functions?

However it only addresses C# and node.js, I want to get the values following flask style

/function/<name>/<id>

which I can directly access, how do I do it in python in Azure functions

I also referred this doc, which only talks about node.js and C#

https://github.com/Azure/azure-functions-host/wiki/Http-Functions

Answer 1

You can add "route" to the function.json file to change the path, for example:

"bindings": [
    {
      "authLevel": "anonymous",
      "type": "httpTrigger",
      "direction": "in",
      "name": "req",
      "methods": [
        "post"
      ],
      "route": "contact/{version}/certificate"
    }
    ....
    ]

And in file __init__.py, you can get version by version = req.route_params.get('version')

Answer 2

To be more dynamic like the path type of Python Flask route in azure functions you can customize the route to be like below. Main Concept is in the route's *{restOfPath}

{
  "scriptFile": "__init__.py",
  "bindings": [
    {
      "authLevel": "function",
      "type": "httpTrigger",
      "direction": "in",
      "name": "req",
      "methods": [
        "get",
        "post"
      ],
      "route": "Function1/{*restOfPath}"
    },
    {
      "type": "http",
      "direction": "out",
      "name": "$return"
    }
  ]
}

and edit the host.json to remove the word api from the URL like below.

{
  "http": {
    "routePrefix": ""
  }
}

so with above configuration you can have the Function to serve URLs like below

1. http://localhost:7071/Function1
2. http://localhost:7071/Function1/name
3. http://localhost:7071/Function1/name/id
4. http://localhost:7071/Function1/name/id/sub-name
5. http://localhost:7071/Function1/name/id/sub-name/sub-id etc ...

Again to access it in init.py use it like below. You would get it as string

req.route_params.get("restOfPath")