如何将XML编码为base64，然后保存到流中？

Question

任务是发送 HTTP web request 以及必须转换为 base64 的 Soap Envelope。

不幸的是，我无法将 Envelope 转换为 base64，因为我的方法 InsertSoapEnvelopeIntoWebRequest 使用 XML 并将其保存为 stream，如下所示。我需要遵循此结构才能使请求正常工作。

    XmlDocument soapEnvelopeXml = CreateSoapEnvelope(attachmentName);
    HttpWebRequest webRequest = CreateWebRequest(url, action, attachmentName);
    InsertSoapEnvelopeIntoWebRequest(soapEnvelopeXml, webRequest);

    private static XmlDocument CreateSoapEnvelope(string attachmentName)
    {
        //Convert name to base64
        var fileNameEncoded = EncodeStringToBase64(attachmentName);
        var authorizationIdEncoded = EncodeStringToBase64("C61582-B73K47EJ54");
        var authorizationKeyEncoded = EncodeStringToBase64("TWTXBP-HNEZ9J-74EV8Z-QM5J9T");
        XmlDocument soapEnvelopeDocument = new XmlDocument();
        soapEnvelopeDocument.LoadXml($@"<?xml version=""1.0"" encoding=""UTF-8""?><SOAP-ENV:Envelope xmlns:SOAP-ENV=""http://schemas.xmlsoap.org/soap/envelope/"" xmlns:xsi=""http://www.w3.org/2001/XMLSchema-instance"" xmlns:xsd=""http://www.w3.org/2001/XMLSchema"" xmlns:SOAP-ENC=""http://schemas.xmlsoap.org/soap/encoding/"" SOAP-ENV:encodingStyle=""http://schemas.xmlsoap.org/soap/encoding/"" xmlns:ns4=""https://efaktura.bg/soap/""><SOAP-ENV:Body><ns4:uploadFile><ns4:authorizationId>{authorizationIdEncoded}</ns4:authorizationId><ns4:authorizationKey>{authorizationKeyEncoded}</ns4:authorizationKey><ns4:fileName>{fileNameEncoded}</ns4:fileName></ns4:uploadFile></SOAP-ENV:Body></SOAP-ENV:Envelope>");
    //            doc.LoadXml(soapRequest.ToString());
        return soapEnvelopeDocument;
    }
    public static string EncodeStringToBase64(string plainTextBytes)
    {
        var plainText = System.Text.Encoding.UTF8.GetBytes(plainTextBytes);

        return System.Convert.ToBase64String(plainText);
    }

    private static void InsertSoapEnvelopeIntoWebRequest(XmlDocument soapEnvelopeXml, HttpWebRequest webRequest)
    {
        using (Stream stream = webRequest.GetRequestStream())
        {
            soapEnvelopeXml.Save(stream);
        }
    }

我试图将 XML 转换为 String 但在 CreateSoapEnvelope 中我有一个方法 LoadXML 如果它是 base64 ，该方法无法阅读，因为它不是 XML 格式。

如果我在 InsertSoapEnvelopeIntoWebRequest 中进行转换，那么我将无法使用 soapEnvelopeXml.Save(stream)

在哪里以及如何进行转换？

Answer 1

将您的 InsertSoapEnvelope 方法更改为：

    private static void InsertSoapEnvelopeIntoWebRequest(XmlDocument soapEnvelopeXml, HttpWebRequest webRequest)
    {
        using (Stream stream = webRequest.GetRequestStream())
        {
            StringWriter sw = new StringWriter();
            XmlTextWriter tx = new XmlTextWriter(sw);
            soapEnvelopeXml.WriteTo(tx);

            string str = sw.ToString();

            Console.WriteLine(soapEnvelopeXml.ToString());
            ASCIIEncoding Encode = new ASCIIEncoding();
            var arr = Encode.GetBytes(EncodeStringToBase64(str));
            stream.Write(arr, 0, arr.Length);
        }
    }

如果你 Console.Writeline XML.ToString() 它会给你参考。这个想法是将 XML 写入使用 StringWriter 的 TextWriter。完成此操作后，您必须先 encode，然后将其转换为 byte array。这只是将其写入流的问题。您将数组、0 偏移量和字节数组的长度作为参数。

如何将XML编码为base64，然后保存到流中？

How to encode XML to base64 and then save it to stream?

c#

xml

soap

encode