HttpRequest のQueryとBodyから値を取得する拡張メソッド

Azure Functions でクラスを追加するとテンプレートについてくる例のやつをやるのが面倒になったのでサンプルコード置いておきます。 パフォーマンス無視したコードになるので利用する際は自己責任で。 あとDynamicJson使ってるので適宜。

github.com

before

[FunctionName("HelloWorld")]
public static async Task<IActionResult> Run(
    [HttpTrigger(AuthorizationLevel.Anonymous, "get", "post", Route = null)] HttpRequest req,
    ILogger log)
{
    log.LogInformation("C# HTTP trigger function processed a request.");

    string name = req.Query["name"];

    string requestBody = await new StreamReader(req.Body).ReadToEndAsync();
    dynamic data = JsonConvert.DeserializeObject(requestBody);
    name = name ?? data?.name;

    return name != null
        ? (ActionResult)new OkObjectResult($"Hello, {name}")
        : new BadRequestObjectResult("Please pass a name on the query string or in the request body");
}

after

[FunctionName("HelloWorld")]
public static async Task<IActionResult> Run(
    [HttpTrigger(AuthorizationLevel.Anonymous, "get", "post", Route = null)] HttpRequest req,
    ILogger log)
{
    log.LogInformation("C# HTTP trigger function processed a request.");

    var name = await req.GetParam<string>("name");

    return name.result && name.value != null
        ? (ActionResult)new OkObjectResult($"Hello, {name.value}")
        : new BadRequestObjectResult("Please pass a name on the query string or in the request body");
}