RestSharp AddFile 将多部分表单标题添加到文件

Question

我正在使用 RestSharp 的 AddFile 并且它几乎可以正常工作，除非我的文件由于添加了这个标题信息而最终被破坏。

-------------------------------28947758029299
Content-Disposition: form-data; name="user.png"; filename="user.png"
Content-Type: image/png

这只是我上传的一张测试图片。如果我从文件中删除这些行，那么它可以正常打开，否则它似乎已损坏。我可以在不添加这些东西的情况下使用 AddFile 吗？

当前代码：

string contentType = MimeMapping.GetMimeMapping("~/uploads/" + filename); //image/png etc
request.AddFile(filename, Server.MapPath("~") + "\\uploads\\" + filename, contentType);
IRestResponse response = client.Execute(request);

还尝试了相同的结果：

request.AddHeader("Content-Type", contentType);
byte[] bytes = File.ReadAllBytes(Server.MapPath("~") + "\\uploads\\" + filename);
request.AddBody(new {myFile = File.ReadAllBytes(Server.MapPath("~") + "\\uploads\\" + filename) });

还有这个（这里根本没有文件通过）：编辑：这实际上有效

string contentType = MimeMapping.GetMimeMapping("~/uploads/" + filename);
byte[] bytes = File.ReadAllBytes(Server.MapPath("~") + "\\uploads\\" + filename);

request.AddHeader("Content-Type", contentType);
request.AddParameter(contentType, bytes, ParameterType.RequestBody);

IRestResponse response = client.Execute(request);

Answer 1

RestSharp is by default sending the files using multi-part form data and the zendesk api you are using (assuming it's this one https://developer.zendesk.com/rest_api/docs/core/attachments#upload-files) isn't expecting that, so it is also writing the multi-part boundary identifiers from the content into the uploaded file.

This answer /sf/answers/1959597601/ on this other thread should resolve your problem.

Update

I just put together a console app with the following code in to upload a pdf to an ASP.NET WebApi project that I created as I don't have access to the ZenDesk API

Main in program.cs:

static void Main(string[] args)
{
    RestRequest request = new RestRequest("values?fileName=test.pdf", Method.POST);

    request.AddParameter("application /pdf", File.ReadAllBytes(@"C:\Temp\upload.pdf"), ParameterType.RequestBody);

    var client = new RestClient(new Uri("http://localhost:55108/api"));

    var response = client.Execute(request);

    Console.ReadLine();
}

Code in ValuesController.cs

public async Task Post(string fileName)
{    static void Main(string[] args)
{
    RestRequest request = new RestRequest("values?fileName=test.pdf", Method.POST);

    request.AddParameter("application/pdf", File.ReadAllBytes(@"C:\Temp\upload.pdf"), ParameterType.RequestBody);

    var client = new RestClient(new Uri("http://localhost:55108/api"));

    var response = client.Execute(request);

    Console.ReadLine();
}
    var file = await this.Request.Content.ReadAsByteArrayAsync();
    File.WriteAllBytes($"C:\\Uploaded\\{fileName}",file);
}

This uploaded the file, it was identical to the original file and the content-type header was set to application/pdf and not multipart/form-data; boundary=-----------------------------28947758029299

Update 2

在 program.cs 中添加了 Main 的实际代码