Azure功能 - 如何读取表单数据

Question

如何在Azure函数中读取表单数据？我尝试过几种方式，但总是得到一个错误，例如：

using System.Net;

public static async Task<HttpResponseMessage> Run(HttpRequestMessage req, TraceWriter log)
{
    dynamic data = await req.Content.ReadAsFormDataAsync();

    return req.CreateResponse(HttpStatusCode.OK, $" {data}");
}

错误：Exception while executing function: Functions.FormTrigger. System.Net.Http.Formatting: No MediaTypeFormatter is available to read an object of type 'FormDataCollection' from content with media type 'application/json'.

我检查了请求内容，我收到了multipart/form-data的请求：

" ------WebKitFormBoundary47wKq7pk9Fcc4H9J\r\nContent-Disposition: form-data; name=\"name\"\r\n\r\nsdgs\r\n
------WebKitFormBoundary47wKq7pk9Fcc4H9J\r\nContent-Disposition: form-data; name=\" _replyto\"\r\n\r\[email protected]\r\n
------WebKitFormBoundary47wKq7pk9Fcc4H9J\r\nContent-Disposition: form-data; name=\"message\"\r\n\r\nsdgsd\r\n
------WebKitFormBoundary47wKq7pk9Fcc4H9J--\r\n"

谢谢你的任何提示。

Answer 1

由于请求包含“application / x-www-form-urlencoded”类型的内容，您需要将输入转换为NameValueCollection以便读取输入：

NameValueCollection col = req.Content.ReadAsFormDataAsync().Result; 
return req.CreateResponse(HttpStatusCode.OK, $" {col[0]}");

您还可以传递Key字符串而不是Index，这将使代码更具可读性和不言自明

Answer 2

为了读取表单数据，有ReadAsMultipartAsync方法：

data = await req.Content.ReadAsMultipartAsync().ConfigureAwait(false);