@azure/data-tables
Version:
An isomorphic client library for the Azure Tables service.
71 lines • 2.29 kB
JavaScript
// Copyright (c) Microsoft Corporation.
// Licensed under the MIT License.
/**
* Parse initializes the AccountSASPermissions fields from a string.
*
* @param permissions -
*/
export function accountSasPermissionsFromString(permissions) {
const accountSasPermissions = {};
for (const c of permissions) {
switch (c) {
case "r":
accountSasPermissions.query = true;
break;
case "w":
accountSasPermissions.write = true;
break;
case "d":
accountSasPermissions.delete = true;
break;
case "l":
accountSasPermissions.list = true;
break;
case "a":
accountSasPermissions.add = true;
break;
case "u":
accountSasPermissions.update = true;
break;
default:
throw new RangeError(`Invalid permission character: ${c}`);
}
}
return accountSasPermissions;
}
/**
* Produces the SAS permissions string for an Azure Storage account.
* Call this method to set AccountSASSignatureValues Permissions field.
*
* Using this method will guarantee the resource types are in
* an order accepted by the service.
*
* @see https://docs.microsoft.com/en-us/rest/api/storageservices/constructing-an-account-sas
*
*/
export function accountSasPermissionsToString(permissions) {
// The order of the characters should be as specified here to ensure correctness:
// https://docs.microsoft.com/en-us/rest/api/storageservices/constructing-an-account-sas
// Use a string array instead of string concatenating += operator for performance
const permissionString = [];
if (permissions.query) {
permissionString.push("r");
}
if (permissions.write) {
permissionString.push("w");
}
if (permissions.delete) {
permissionString.push("d");
}
if (permissions.list) {
permissionString.push("l");
}
if (permissions.add) {
permissionString.push("a");
}
if (permissions.update) {
permissionString.push("u");
}
return permissionString.join("");
}
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