J'ai créé une application Xamarin UWP à l'aide d'applications Azure Mobile et j'essaie de télécharger un stockage BLOB vers Azure avec un jeton SAS et le client .Net Azure Storage (8.4.0). Je suis capable de générer le jeton SAS pour mon conteneur via une fonction Easy API Node mais lorsque j'essaie de l'utiliser pour télécharger le fichier, j'obtiens une erreur "Le serveur n'a pas réussi à authentifier la requête. formé correctement, y compris la signature "Impossible de télécharger BLOB avec SAS Token
code API facile. pour GetUploadToken
var azure = require('azure-storage');
function generateSasToken(container, blobName, permissions) {
var connString = "<conn string from azure storage acct>"; // removed for StackOverflow question
var blobService = azure.createBlobService(connString);
var currentDate = new Date();
var startDate = new Date(currentDate);
startDate.setMinutes(currentDate.getMinutes() - 5);
console.log("startDate: " + startDate);
console.log("current date: " + currentDate);
var expiryDate = new Date(currentDate);
expiryDate.setMinutes(currentDate.getMinutes() + 60);
console.log("expiryDate: " + expiryDate);
permissions = permissions || azure.BlobUtilities.SharedAccessPermissions.READ;
var sharedAccessPolicy = {
AccessPolicy: {
Permissions: permissions,
Start: startDate,
Expiry: expiryDate
}
};
var sasToken = blobService.generateSharedAccessSignature(container, blobName, sharedAccessPolicy);
console.log("SAS Token: " + sasToken);
return {
token: sasToken,
uri: blobService.getUrl(container, blobName, sasToken)
};
}
module.exports = {
"post": function (req, res, next) {
if (req.body.Container) {
console.log("Container: " + req.body.Container);
console.log("BlobName:" + req.body.BlobName);
console.log("Permissions:" + req.body.Permissions);
// The following values can be used for permissions:
// "a" (Add), "r" (Read), "w" (Write), "d" (Delete), "l" (List)
// Concatenate multiple permissions, such as "rwa" = Read, Write, Add
var token = generateSasToken(req.body.Container, req.body.BlobName, req.body.Permissions);
res.status(200).type('application/json').json(token);
} else {
res.status(400).type("text/plain").text("Specify a value for 'container");
}
}
};
API facile sortie
Container: sketches
BlobName:DSCF3726.JPG
Permissions:rwa
startDate: Thu Oct 05 2017 14:39:36 GMT+0000 (Coordinated Universal Time)
current date: Thu Oct 05 2017 14:44:36 GMT+0000 (Coordinated Universal Time)
expiryDate: Thu Oct 05 2017 15:44:36 GMT+0000 (Coordinated Universal Time)
SAS Token: st=2017-10-05T14%3A39%3A36Z&se=2017-10-05T15%3A44%3A36Z&sp=rwa&sv=2017-04-17&sr=b&sig=...
Ajouter code
internal async Task<string> UploadAsync(string fileName, byte[] dataArray)
{
var sketchFile = new SketchFile
{
BlobName = fileName,
Container = "sketches",
Permissions = "rwa"
};
var response = await CurrentClient.InvokeApiAsync<SketchFile, GetSasTokenResponse>(
"GetUploadToken",
sketchFile);
try
{
var blob = new CloudBlockBlob(new Uri(response.Uri));
await blob.UploadFromByteArrayAsync(dataArray, 0, dataArray.Length);
}
catch (StorageException se)
{
System.Diagnostics.Debug.WriteLine($"Error uploading {fileName}: {se.RequestInformation.ExtendedErrorInformation.ErrorMessage}.");
return null;
}
var uri = response.Uri.Substring(0, response.Uri.IndexOf('?'));
return uri;
}
C'était tout! Merci! –