Question

我正在尝试将包含任意二进制数据的文件作为multipart / form-data发布到WebAPI 2控制器。

尝试使用以下内容读取文件时：

var provider = new MultipartFormDataStreamProvider(uploadDirectoryPath);

await Request.Content.ReadAsMultipartAsync(provider);

我明白了：

System.InvalidOperationException: The character set provided in ContentType is invalid. 
Cannot read content as string using an invalid character set. 
---> System.ArgumentException: '"utf-8"' is not a supported encoding name. 
For information on defining a custom encoding, see the documentation for the Encoding.RegisterProvider method.
Parameter name: name

我理解问题是utf-8周围的引号，内部使用的HttpContent.ReadAsStringAsync()中的this错误是here所解释的。

请求是从Unity3D应用程序发送的，我无法更改请求正文中的字符集。

以下是我在Unity3D脚本中用于创建POST请求的代码。

WWW chunkFile = new WWW("file:///" + Path.Combine(tempZipFolderPath, chunkFilenames[j]));

yield return chunkFile;

if (chunkFile.error != null)
    throw new Exception(string.Format("{0} error opening file {1}", chunkFile.error, chunkFilenames[j]));

//BUGFIX: Not using IMultipartFormSection because of https://fogbugz.unity3d.com/default.asp?826626_htlchp13nh8th2to

var form = new WWWForm();

form.AddField("chunkNumber", chunkNumber);
form.AddField("totalChunks", totalChunks);
form.AddField("identifier", tempZipFileName);
form.AddBinaryData("filename", chunkFile.bytes, chunkFilenames[j]);

var scanUploadPostRequest = UnityWebRequest.Post(WebApiScanUploadUrl, form);

yield return scanUploadPostRequest.Send();

//BUGBUG: charset UTF-8 wrapped in quotes causes error

有解决方法吗？

当charset被引号括起时，会抛出HttpContent.ReadAsStringAsync

0 个答案: