上传图片蔚蓝的Blob存储 [英] uploading image to azure blob storage
问题描述
我知道这个问题可能是PTED为重复间$ P $，但我根本无法得到blop服务工作。我按照标准的<一个href=\"http://www.windowsazure.com/en-us/documentation/articles/mobile-services-windows-phone-upload-data-blob-storage/\"相对=nofollow>例如MSDN上。我在code语言实现的，但随后的例子。我可以让我MobileService，在这个例子中提供的脚本，插入开放性质的斑点。然后我用这个code将图像上传到Blob存储：
I know this question can be interpreted as a duplicate, but I can simply not get the blop service working. I have followed the standard example on msdn. I have implemented in my code but followed the example. I can get my MobileService, with the supplied script in the example, to insert a blob with open properties. I then use this code to upload an image to the blob storage:
BitmapImage bi = new BitmapImage();
MemoryStream stream = new MemoryStream();
if (bi != null)
{
WriteableBitmap bmp = new WriteableBitmap((BitmapSource)bi);
bmp.SaveJpeg(stream, bmp.PixelWidth, bmp.PixelHeight, 0, 100);
}
if (!string.IsNullOrEmpty(uploadImage.SasQueryString))
{
// Get the URI generated that contains the SAS
// and extract the storage credentials.
StorageCredentials cred = new StorageCredentials(uploadImage.SasQueryString);
var imageUri = new Uri(uploadImage.ImageUri);
// Instantiate a Blob store container based on the info in the returned item.
CloudBlobContainer container = new CloudBlobContainer(
new Uri(string.Format("https://{0}/{1}",
imageUri.Host, uploadImage.ContainerName)), cred);
// Upload the new image as a BLOB from the stream.
CloudBlockBlob blobFromSASCredential = container.GetBlockBlobReference(uploadImage.ResourceName);
await blobFromSASCredential.UploadFromStreamAsync(stream);//error!
// When you request an SAS at the container-level instead of the blob-level,
// you are able to upload multiple streams using the same container credentials.
stream = null;
}
我得到一个错误在这个code在点标记错误，并出现以下错误：
I am getting an error in this code at the point marked error, with the following error:
+ ex {Microsoft.WindowsAzure.Storage.StorageException: The remote server returned an error: NotFound. ---> System.Net.WebException: The remote server returned an error: NotFound. ---> System.Net.WebException: The remote server returned an error: NotFound.
我不明白，因为code，从脚本返回的字符串是：
Which I do not understand since the code that returns the string from the script is:
// Generate the upload URL with SAS for the new image.
var sasQueryUrl = blobService.generateSharedAccessSignature(item.containerName,
item.resourceName, sharedAccessPolicy);
// Set the query string.
item.sasQueryString = qs.stringify(sasQueryUrl.queryString);
// Set the full path on the new new item,
// which is used for data binding on the client.
item.imageUri = sasQueryUrl.baseUrl + sasQueryUrl.path;
当然，这也显示了，我不完全掌握Blob存储的建设。因此，任何帮助将是AP preciated。
Of course this also depicts that I do not completely grasp the construction of the blob storage. And therefore any help would be appreciated.
注释阐述
从服务器code应该为至少5分钟创建一个公共注释。因此不会成为问题。我的服务器脚本是一样的<一个href=\"http://www.windowsazure.com/en-us/documentation/articles/mobile-services-windows-phone-upload-data-blob-storage/\"相对=nofollow>的链接。但在这里复制：
var azure = require('azure');
var qs = require('querystring');
var appSettings = require('mobileservice-config').appSettings;
function insert(item, user, request) {
// Get storage account settings from app settings.
var accountName = appSettings.STORAGE_ACCOUNT_NAME;
var accountKey = appSettings.STORAGE_ACCOUNT_ACCESS_KEY;
var host = accountName + '.blob.core.windows.net';
if ((typeof item.containerName !== "undefined") && (
item.containerName !== null)) {
// Set the BLOB store container name on the item, which must be lowercase.
item.containerName = item.containerName.toLowerCase();
// If it does not already exist, create the container
// with public read access for blobs.
var blobService = azure.createBlobService(accountName, accountKey, host);
blobService.createContainerIfNotExists(item.containerName, {
publicAccessLevel: 'blob'
}, function(error) {
if (!error) {
// Provide write access to the container for the next 5 mins.
var sharedAccessPolicy = {
AccessPolicy: {
Permissions: azure.Constants.BlobConstants.SharedAccessPermissions.WRITE,
Expiry: new Date(new Date().getTime() + 5 * 60 * 1000)
}
};
// Generate the upload URL with SAS for the new image.
var sasQueryUrl =
blobService.generateSharedAccessSignature(item.containerName,
item.resourceName, sharedAccessPolicy);
// Set the query string.
item.sasQueryString = qs.stringify(sasQueryUrl.queryString);
// Set the full path on the new new item,
// which is used for data binding on the client.
item.imageUri = sasQueryUrl.baseUrl + sasQueryUrl.path;
} else {
console.error(error);
}
request.execute();
});
} else {
request.execute();
}
}
与图像的想法是，该应用的其他用户应能够访问它们。据我了解我已公开，但只有5分钟写公开。对于BLOB我保存在一个mobileservice表，其中用户需要进行身份验证的URL，我想在存储相同的安全。但不知道这是否完成？我为所有的愚蠢的问题抱歉，但我一直没能解决它在我自己的，所以我必须看起来愚蠢：）
The idea with the pictures is that other users of the app should be able to access them. As far as I understand I have made it public, but only write public for 5 minutes. The url for the blob I save in a mobileservice table, where the user needs to be authenticated, I would like the same safety on the storage. But do not know if this is accomplished? I am sorry for all the stupid questions, but I have not been able to solve it on my own so I have to "seem" stupid :)
推荐答案
如果有人在这里需要帮助的结束。对我来说，问题是URI。它应该是http和没有使用https。然后有没有错误上传。
If someone ends up in here needing help. The problem for me was the uri. It should have been http and not https. Then there were no error uploading.
但显示即使在从工具箱中的测试图像控制图像，没有成功。问题是我必须设置流开始时：
But displaying the image even on a test image control from the toolbox, did not succeed. The problem was I had to set the stream to the begining:
stream.Seek(0, SeekOrigin.Begin);
接着上传工作，并能够检索数据。
Then the upload worked and was able to retrieve the data.
这篇关于上传图片蔚蓝的Blob存储的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
