> For the complete documentation index, see [llms.txt](https://til.cazzulino.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://til.cazzulino.com/azure/code-less-redirection-with-serverless-azure-functions.md).

# Code-less redirection with serverless Azure Functions

Say you want to have a nicer URI for something (like an Azure storage blob, a feed or something else). You likely have a nice short custom domain (i.e. I use kzu.io for things like this), and would like to set up arbitrary (temporary or permanent) redirections. This can trivially be achieved by creating an empty Functions App and leveraging [Functions Proxies](https://docs.microsoft.com/en-us/azure/azure-functions/functions-proxies).

The `proxies.json` file for code-less redirects looks as follows:

```javascript
{
    "$schema": "http://json.schemastore.org/proxies",
    "proxies": {
        "[SOME_ID]": {
            "matchCondition": {
                "methods": [ "GET" ],
                "route": "[SHORT_PATH_HERE]"
            },
            "responseOverrides": {
                "response.statusCode": "[301|302|307|308|",
                "response.headers.location": "[LONG_URL_HERE]"
            }
        }
    }
}
```

You can have as many of those IDs/entries as needed. For example, this is one I use to set up `https://pkg.kzu.io/index.json` > `https://kzu.blob.core.windows.net/nuget/index.json`:

```javascript
{
    "$schema": "http://json.schemastore.org/proxies",
    "proxies": {
        "default": {
            "matchCondition": {
                "methods": [ "GET" ],
                "route": "index.json"
            },
            "responseOverrides": {
                "response.statusCode": "307",
                "response.headers.location": "https://kzu.blob.core.windows.net/nuget/index.json"
            }
        }
    }
}
```


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