如何在Android中將文件轉換為可以在ASP.Net（SOAP）Web服務中使用的字節數組？

Question

我在ASP.net（SOAP）中有一個簡單的文件上傳Web服務，這是代碼：

<WebMethod()> _
    Public Function UploadFile(ByVal f As Byte(), ByVal fileName As String) As String
        Dim result As String = Json.JsonConvert.SerializeObject(New Result("INFO"))
        Dim ms As MemoryStream
        Dim fs As FileStream

        Try
            ms = New MemoryStream(f)
            fs = New FileStream(System.Web.Hosting.HostingEnvironment.MapPath("~/Upload/") & fileName, FileMode.Create)

            ms.WriteTo(fs)

            result = Json.JsonConvert.SerializeObject(New Result("Upload Successful", ""))
        Catch ex As Exception
            result = Json.JsonConvert.SerializeObject(New Result("Upload Failed", ex.Message))
            MyCustomClass.Utilities.EventsLog.CreateEventsLog("FileDALC.asmx - UploadFile", ex.Message, ex.Source, "Services", Utilities.EventsLogType.Failed)
        Finally
            If Not IsNothing(ms) Then
                ms.Close()
                ms.Dispose()
            End If 

            If Not IsNothing(fs) Then
                fs.Close()
                fs.Dispose()
            End If
        End Try 

        Return Result
    End Function

我想要的只是從我的Android設備調用該Web服務並發送一些字節數組參數，但是我始終無法生成可被Web服務識別的字節數組。

這是我在Android設備中的代碼：

public class WebServiceUploadData {
    private static String NAMESPACE = "http://services.chameleonmobile.app/"; 
    private static String URL = "http://10.41.25.49/SERVICES/Chameleon.WS.TitaniumMobile/FileDALC.asmx";
    private static String SOAP_ACTION = "http://services.chameleonmobile.app/";

    public static String invokeUploadFile(byte[] _file, String _fileName, String webMethName) {
        String resTxt = "";
        SoapObject request = new SoapObject(NAMESPACE, webMethName);

        PropertyInfo file = new PropertyInfo();
        file.setName("f");
        file.setValue(_file);

        PropertyInfo fileName = new PropertyInfo();
        fileName.setName("fileName");
        fileName.setValue(_fileName);
        fileName.setType(String.class);

        request.addProperty(file);
        request.addProperty(fileName);

        SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
        envelope.dotNet = true;
        envelope.setOutputSoapObject(request);
        new MarshalBase64().register(envelope);
        HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);

        try {
            androidHttpTransport.call(SOAP_ACTION+webMethName, envelope);
            SoapPrimitive response = (SoapPrimitive) envelope.getResponse();
            resTxt = response.toString();
        }
        catch (Exception e) {
            e.printStackTrace();

            if (e.getMessage().contains("EHOSTUNREACH")){
                 resTxt += "Error occured (Method Not Found, Wrong Network) - " + e.getMessage();
            }
            else if(e.getMessage().contains("ENETUNREACH")){
                resTxt += "Error occured (Network Offline and Unreachable) - " + e.getMessage();
            }
            else{
                resTxt += "Error occured - " + e.getMessage();
            }   
        } 

        return resTxt;
    }
}

並在MainActivity.java中異步調用該函數。

我產生這樣的字節數組（uploadFile是將發送到Web服務的字節數組參數）：

File dirFile = new File(Environment.getExternalStorageDirectory() + "/TempDownloadFile", "Halo.txt");
FileInputStream fis = new FileInputStream(dirFile);

ByteArrayOutputStream bos = new ByteArrayOutputStream();
byte[] buf = new byte[1024];
for (int readNum; (readNum = fis.read(buf)) != -1;) {
    bos.write(buf, 0, readNum);
}                      
byte[] bytes = bos.toByteArray();
uploadFile = Base64.encode(bytes, Base64.DEFAULT);

並嘗試這個：

byte[] uploadData = FileUtils.readFileToByteArray(dirFile);//Convert any file, image or video into byte array
uploadFile = Base64.encode(uploadData, Base64.DEFAULT);//Base64.encodeToString(data, Base64.NO_WRAP);

和這個：

uploadFile = Base64.encode(IOUtils.toByteArray(fis), Base64.DEFAULT);

但是不幸的是，我嘗試過的所有方法都不適合我，並且我的soap Web服務仍然無法重新識別我的字節數組。

有誰知道如何解決這一問題？ 謝謝..

Answer 1

我會嘗試使用諸如Fiddler之類的東西來記錄擊中Web服務的流量，以便您可以看到soap請求的實際外觀並將其發布。

我還考慮不將來自Internet的連接並置在一起，因為這會通過稱為目錄遍歷攻擊的技術使您的服務器處於危險之中：

Dim badFileName As String = "..\..\inetpub\wwwroot\default.aspx"
File.CreateText("C:\Users\a-h\" + badFileName)

該代碼段與您的代碼類似，將嘗試在C：\\ inetpub \\ wwwroot \\ default.aspx上創建一個文件，而不是我希望將其保存到的C：\\ Users \\ ah \\目錄。

最后，也許您會發現從Android使用Web API更容易，因為您可以發布HTTP請求來代替。