【发布时间】：2021-02-03 17:07:10
【问题描述】：
获取http 400，尝试将图像上传到blob时，使用邮递员测试api：
[Route("~/api/myAPI/testapi")]
[HttpPost]
public async Task<HttpResponseMessage> testapi()
{
String strorageconn = System.Configuration.ConfigurationManager.AppSettings.Get("MyBlobStorageConnectionString");
Dictionary<string, object> dict = new Dictionary<string, object>();
try
{
// Create a CloudStorageAccount object using account name and key.
// The account name should be just the name of a Storage Account, not a URI, and
// not including the suffix. The key should be a base-64 encoded string that you
// can acquire from the portal, or from the management plane.
// This will have full permissions to all operations on the account.
// StorageCredentials storageCredentials = new StorageCredentials(myAccountName, myAccountKey);
//CloudStorageAccount cloudStorageAccount = new CloudStorageAccount(storageCredentials, useHttps: true);
// Parse the connection string and return a reference to the storage account.
CloudStorageAccount storageAccount = CloudStorageAccount.Parse(strorageconn);
// If the connection string is valid, proceed with operations against Blob
// storage here.
// ADD OTHER OPERATIONS HERE
// Create the CloudBlobClient that represents the
// Blob storage endpoint for the storage account.
CloudBlobClient cloudBlobClient = storageAccount.CreateCloudBlobClient();
// Create a container called 'quickstartblobs' and
// append a GUID value to it to make the name unique.
CloudBlobContainer cloudBlobContainer = cloudBlobClient.GetContainerReference("images");
//"quickstartblobs" + Guid.NewGuid().ToString());
await cloudBlobContainer.CreateAsync();
if (cloudBlobContainer.CreateIfNotExists())
{
cloudBlobContainer.SetPermissions(
new BlobContainerPermissions
{
PublicAccess = BlobContainerPublicAccessType.Blob
});
}
// Set the permissions so the blobs are public.
/* BlobContainerPermissions permissions = new BlobContainerPermissions
{
PublicAccess = BlobContainerPublicAccessType.Blob
};
await cloudBlobContainer.SetPermissionsAsync(permissions); */
// Create a CloudBlobClient object from the storage account.
// This object is the root object for all operations on the
// blob service for this particular account.
//CloudBlobClient blobClient = cloudStorageAccount.CreateCloudBlobClient();
var httpRequest = HttpContext.Current.Request;
foreach (string file in httpRequest.Files)
{
HttpResponseMessage response = Request.CreateResponse(HttpStatusCode.Created);
var postedFile = httpRequest.Files[file];
// Get a reference to a CloudBlobContainer object in this account.
// This object can be used to create the container on the service,
// list blobs, delete the container, etc. This operation does not make a
// call to the Azure Storage service. It neither creates the container
// on the service, nor validates its existence.
string imageName = "images" +serverTime.Year.ToString() + serverTime.Month.ToString() + serverTime.Day.ToString() +
serverTime.Hour.ToString() + serverTime.Minute.ToString() + serverTime.Second.ToString ()
+ postedFile.FileName.ToLower();
//CloudBlobContainer container = blobClient.GetContainerReference(imageName.ToLower());
/*if(await container.CreateIfNotExistsAsync())
{
await container.SetPermissionsAsync(
new BlobContainerPermissions {
PublicAccess = BlobContainerPublicAccessType.Blob
}
);
} */
if (postedFile != null && postedFile.ContentLength > 0)
{
int MaxContentLength = 1024 * 1024 * 1; //Size = 1 MB
IList<string> AllowedFileExtensions = new List<string> { ".jpg", ".gif", ".png" };
var ext = postedFile.FileName.Substring(postedFile.FileName.LastIndexOf('.'));
var extension = ext.ToLower();
if (!AllowedFileExtensions.Contains(extension))
{
var message = string.Format("Please Upload image of type .jpg,.gif,.png.");
dict.Add("error", message);
return Request.CreateResponse(HttpStatusCode.BadRequest, dict);
}
else if (postedFile.ContentLength > MaxContentLength)
{
var message = string.Format("Please Upload a file upto 1 mb.");
dict.Add("error", message);
return Request.CreateResponse(HttpStatusCode.BadRequest, dict);
}
else
{
var filePath = HttpContext.Current.Server.MapPath("~/imagesfiles/uploads" + postedFile.FileName.ToLower() + extension.ToLower());
postedFile.SaveAs(filePath);
//CloudBlockBlob cloudBlockBlob = container.GetBlockBlobReference(imageName);
// Get a reference to the blob address, then upload the file to the blob.
// Use the value of localFileName for the blob name.
CloudBlockBlob cloudBlockBlob = cloudBlobContainer.GetBlockBlobReference(imageName.ToLower());
// create a blob in container and upload image bytes to it
//var blob =container.GetBlobReference(postedFile.FileName);
await cloudBlockBlob.UploadFromFileAsync(postedFile.FileName);
//await cloudBlockBlob.UploadFromFileAsync(filePath);
}
}
var message1 = string.Format("Image Updated Successfully.");
return Request.CreateErrorResponse(HttpStatusCode.Created, message1); ;
}
var res = string.Format("Please Upload a image.");
dict.Add("error", res);
return Request.CreateResponse(HttpStatusCode.NotFound, dict);
}
catch (Exception ex)
{
HttpResponseMessage response2 = Request.CreateResponse(HttpStatusCode.BadRequest, ex.InnerException.ToString());
return response2;
}
}
邮递员的回应：
"System.Net.WebException: The remote server returned an error: (400) Bad Request.\r\n at Microsoft.Azure.Storage.Shared.Protocol.HttpResponseParsers.ProcessExpectedStatusCodeNoException[T](HttpStatusCode expectedStatusCode, HttpStatusCode actualStatusCode, T retVal, StorageCommandBase`1 cmd, Exception ex)\r\n at Microsoft.Azure.Storage.Blob.CloudBlobContainer.<>c_DisplayClass149_0.<CreateContainerImpl>b_2(RESTCommand`1 cmd, HttpWebResponse resp, Exception ex, OperationContext ctx)\r\n at Microsoft.Azure.Storage.Core.Executor.Executor.EndGetResponse[T](IAsyncResult getResponseResult)"
【问题讨论】：
标签： c# azure asp.net-web-api file-upload azure-blob-storage