android - 使用 asp.net WebService 和 Android 将图像上传到 Azure Blob 存储？

Question

我正在尝试通过我的 Android 设备将选定的图像上传到 Azure Blob

我制作的 asp.net WebService。

但我在 android 中收到一个橙色错误:“W/System.err(454): SoapFault - faultcode: 'soap:Server' faultstring: 'Server was unable to process request. ---> Object reference not set to一个对象的实例。 faultactor:'null' 详细信息:org.kxml2.kdom.Node@4205f358"

我不确定是我的 Java 代码还是 WebService 女巫错了...

这是两个代码:

网络服务:

    [WebMethod]
    public string UploadFile(string myBase64String, string fileName)
    {
        byte[] f = Convert.FromBase64String(myBase64String);

        CloudStorageAccount storageAccount = CloudStorageAccount.Parse(
        ConfigurationManager.ConnectionStrings["StorageConnectionString"].ConnectionString);

        CloudBlobClient blobClient = storageAccount.CreateCloudBlobClient();
        // Retrieve a reference to a container. 
        CloudBlobContainer container = blobClient.GetContainerReference("mycontainer");

        // Create the container if it doesn't already exist.
        container.CreateIfNotExists();

        container.SetPermissions(
         new BlobContainerPermissions
         {
             PublicAccess = BlobContainerPublicAccessType.Blob
         });

        // Retrieve reference to a blob named "myblob".
        CloudBlockBlob blockBlob = container.GetBlockBlobReference(fileName);

        using (MemoryStream stream = new MemoryStream(f))
        {
            blockBlob.UploadFromStream(stream);
        }

        return "OK";
    }

我已经在 Forms .net 中测试了这段代码，它在解析 Base64 字符串并将其转换为 byte[] 时工作正常。所以我不认为这是错误的 WebService 代码..

请帮帮我!

这里是 Java->Android:

private String TAG = "PGGURU";
Uri currImageURI;
    String encodedImage;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    // To open up a gallery browser
            Intent intent = new Intent();
            intent.setType("image/*");
            intent.setAction(Intent.ACTION_GET_CONTENT);
            startActivityForResult(Intent.createChooser(intent, "Select Picture"),1);
}

byte[] b;
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) { 

        if (resultCode == RESULT_OK) {

                if (requestCode == 1) {
                        // currImageURI is the global variable I'm using to hold the content:// URI of the image
                        currImageURI = data.getData();
                        String ImageUri = getRealPathFromURI(currImageURI);

                        Bitmap bm = BitmapFactory.decodeFile(ImageUri);
                        ByteArrayOutputStream baos = new ByteArrayOutputStream();  
                        bm.compress(Bitmap.CompressFormat.JPEG, 100, baos); //bm is the bitmap object   
                        b = baos.toByteArray(); 
                            //encoded image to Base64
                        encodedImage = Base64.encodeToString(b, Base64.DEFAULT);

                      //Create instance for AsyncCallWS
                        AsyncCallWS task = new AsyncCallWS();
                        task.execute();
                }
        }
}

public void UploadImage(String image, String imageName) {
    //Create request
    SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME);
    //Property which holds input parameters
    PropertyInfo PI = new PropertyInfo();
    PI.setName("myBase64String");
    PI.setValue(image);
    PI.setType(String.class);
    request.addProperty(PI);

    PI=new PropertyInfo();
    PI.setName("fileName");
    PI.setValue(imageName);
    PI.setType(String.class);
    request.addProperty(PI);

    //Create envelope
    SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(
            SoapEnvelope.VER11);
    envelope.dotNet = true;
    //Set output SOAP object
    envelope.setOutputSoapObject(request);
    //Create HTTP call object
    HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);

    try {
        //Invole web service
        androidHttpTransport.call(SOAP_ACTION, envelope);
        //Get the response
        SoapPrimitive response = (SoapPrimitive) envelope.getResponse();
        //Assign it to fahren static variable


    } catch (Exception e) {
        e.printStackTrace();
    }
}


private class AsyncCallWS extends AsyncTask<String, Void, Void> {
    @Override
    protected Void doInBackground(String... params) {
        Log.i(TAG, "doInBackground");
        UploadImage(encodedImage, "randomName");
        return null;
    }

    @Override
    protected void onPostExecute(Void result) {
        Log.i(TAG, "onPostExecute");

    }

    @Override
    protected void onPreExecute() {
        Log.i(TAG, "onPreExecute");

    }

    @Override
    protected void onProgressUpdate(Void... values) {
        Log.i(TAG, "onProgressUpdate");
    }

}

PS:我已授予对 Internet、WRITE_EXTERNAL_STORAGE 和 RECORD_AUDIO 的使用权限

Answer 1

我终于解决了这个问题:D wihu!

在 WebService 中，我必须更改:

CloudStorageAccount storageAccount = CloudStorageAccount.Parse(
ConfigurationManager.GetSetting("StorageConnectionString"));

对此(几乎相同):

CloudStorageAccount storageAccount = CloudStorageAccount.Parse(
CloudConfigurationManager.GetSetting("StorageConnectionString"));

然后转到 => VS12 中的“管理 nuget 包”，并安装 Windows Azure 存储。

此外，我还必须移动变量:byte[] f = Convert.FromBase64String(myBase64String);

在方法之外，像这样:

    byte[] f;
    [WebMethod]
    public string UploadFile(string myBase64String, string fileName)
    {
         f = Convert.FromBase64String(myBase64String);
    }

就是这样。

所以 WebService 看起来像这样:

byte[] f;
    [WebMethod]
    public string UploadFile(string myBase64String, string fileName)
    {
        f = Convert.FromBase64String(myBase64String);


        CloudStorageAccount storageAccount = CloudStorageAccount.Parse(
        CloudConfigurationManager.GetSetting("StorageConnectionString"));

        CloudBlobClient blobClient = storageAccount.CreateCloudBlobClient();
        // Retrieve a reference to a container. 
        CloudBlobContainer container = blobClient.GetContainerReference("mycontainer");

        // Create the container if it doesn't already exist.
        container.CreateIfNotExists();

        container.SetPermissions(
         new BlobContainerPermissions
         {
             PublicAccess = BlobContainerPublicAccessType.Blob
         });

        // Retrieve reference to a blob named "myblob".
        CloudBlockBlob blockBlob = container.GetBlockBlobReference(fileName);

        using (MemoryStream stream = new MemoryStream(f))
        {
            blockBlob.UploadFromStream(stream);
        }
        return "OK";
    }

这会将图像作为 ByteArray 发送到 Windows Azure 存储。

下一步是下载文件并将其转换为位图图像:)

如果这有帮助请给我一些分数:D