Question

我几天来一直试图解决这个难题。我在swift和c＃中的通奸技巧已经赶上了我。

我试图将swift中的图片上传到用c＃制作的网络服务中。

但无论我做什么，我最终都会得到同样的错误。

Optional(System.InvalidOperationException: Request format is invalid: multipart/form-data; boundary=Boundary-C59AEB2F-ABB1-4771-8564-D3659108DF7E.

   at System.Web.Services.Protocols.HttpServerProtocol.ReadParameters()

   at System.Web.Services.Protocols.WebServiceHandler.CoreProcessRequest()

)

这是我的Swift功能

func uploadImages(){

    let url = NSURL(string: "https://www.xxx.xxx/WebService.asmx/UploadVideoFile?VideoFileData=")

        let request = NSMutableURLRequest(url: url! as URL)

        request.httpMethod = "POST"

        let boundary = generateBoundaryString()

        request.setValue("multipart/form-data; boundary=\(boundary)", forHTTPHeaderField: "Content-Type")

        let image_data = UIImagePNGRepresentation(UIImage(named: "plainDogFIlledWhite.png")!)

        if(image_data == nil)
        {
            return
        }

        let body = NSMutableData()
        let fname = "test.png"
        let mimetype = "image/png"

        body.append("--\(boundary)\r\n".data(using: String.Encoding.utf8)!)
        body.append("Content-Disposition:form-data; name=\"test\"\r\n\r\n".data(using: String.Encoding.utf8)!)
        body.append("hi\r\n".data(using: String.Encoding.utf8)!)
        body.append("--\(boundary)\r\n".data(using: String.Encoding.utf8)!)
        body.append("Content-Disposition:form-data; name=\"file\"; filename=\"\(fname)\"\r\n".data(using: String.Encoding.utf8)!)
        body.append("Content-Type: \(mimetype)\r\n\r\n".data(using: String.Encoding.utf8)!)
        body.append(image_data!)
        body.append("\r\n".data(using: String.Encoding.utf8)!)
        body.append("--\(boundary)--\r\n".data(using: String.Encoding.utf8)!)

        request.httpBody = body as Data

        let session = URLSession.shared


        let task = session.dataTask(with: request as URLRequest) {
            (
            data, response, error) in

            guard let data = data, let response = response, error == nil else {
                print("error")
                return
            }

            let dataString = NSString(data: data, encoding: String.Encoding.utf8.rawValue)
            print(dataString)

        }
        task.resume()
}

我试图让我的服务尽可能简单..

c＃service

[WebMethod]
    public string UploadVideoFile(byte[] VideoFileData)
    {
      return "return this";
    }

Swift图片上传和c＃web服务

0 个答案: