/// <summary>
/// Lists the queues within the account.
/// </summary>
/// <returns>A list of queues</returns>
private ListQueueResult ListQueuesImpl(string prefix, string marker, int maxResult)
{
ListQueueResult result = null;
RetryPolicy(() =>
{
NameValueCollection col = new NameValueCollection();
col.Add(StorageHttpConstants.QueryParams.QueryParamComp, StorageHttpConstants.CompConstants.List);
if (!string.IsNullOrEmpty(prefix))
{
col.Add(StorageHttpConstants.QueryParams.QueryParamPrefix, prefix);
}
if (!string.IsNullOrEmpty(marker))
{
col.Add(StorageHttpConstants.QueryParams.QueryParamMarker, marker);
}
col.Add(StorageHttpConstants.QueryParams.QueryParamMaxResults, maxResult.ToString(CultureInfo.InvariantCulture));
ResourceUriComponents uriComponents;
Uri uri = Utilities.CreateRequestUri(
AccountInfo.BaseUri,
AccountInfo.UsePathStyleUris,
AccountInfo.AccountName,
null,
null,
Timeout,
col,
out uriComponents
);
HttpWebRequest request = Utilities.CreateHttpRequest(uri, StorageHttpConstants.HttpMethod.Get, Timeout);
_credentials.SignRequest(request, uriComponents);
try
{
using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
{
if (response.StatusCode == HttpStatusCode.OK)
{
using (Stream stream = response.GetResponseStream())
{
result = GetQueuesFromResponse(stream);
stream.Close();
}
}
else
{
Utilities.ProcessUnexpectedStatusCode(response);
}
response.Close();
}
}
catch (WebException we)
{
throw Utilities.TranslateWebException(we);
}
});
return(result);
}
private static ListQueueResult GetQueuesFromResponse(Stream stream)
{
ListQueueResult result = null;
List <string> names = new List <string>();
List <string> urls = new List <string>();
string nextMarker = null;
XmlDocument doc = new XmlDocument();
try
{
doc.Load(stream);
}
catch (XmlException xe)
{
throw new StorageServerException(StorageErrorCode.ServiceBadResponse,
"The result of a ListQueue operation could not be parsed", default(HttpStatusCode), xe);
}
// get queue names and urls
XmlNodeList queueNameNodes = doc.SelectNodes(XPathQueryHelper.QueueListQuery);
foreach (XmlNode queueNameNode in queueNameNodes)
{
string queueName = XPathQueryHelper.LoadSingleChildStringValue(queueNameNode, StorageHttpConstants.XmlElementNames.QueueName, true);
names.Add(queueName);
string url = XPathQueryHelper.LoadSingleChildStringValue(queueNameNode, StorageHttpConstants.XmlElementNames.Url, true);
urls.Add(url);
}
// Get the nextMarker
XmlNode nextMarkerNode = doc.SelectSingleNode(XPathQueryHelper.NextMarkerQuery);
if (nextMarkerNode != null && nextMarkerNode.FirstChild != null)
{
nextMarker = nextMarkerNode.FirstChild.Value;
}
if (names.Count > 0)
{
Debug.Assert(names.Count == urls.Count);
result = new ListQueueResult(names, urls, nextMarker);
}
return(result);
}
/// <summary>
/// Lists all queues with a given prefix within an account.
/// </summary>
/// <param name="prefix"></param>
/// <returns>The list of queue names.</returns>
public override IEnumerable <MessageQueue> ListQueues(string prefix)
{
string marker = "";
const int maxResults = StorageHttpConstants.ListingConstants.MaxQueueListResults;
do
{
ListQueueResult result = ListQueuesImpl(prefix, marker, maxResults);
if (result == null)
{
marker = null;
}
else
{
marker = result.NextMarker;
foreach (string name in result.Names)
{
yield return(new QueueRest(name, AccountInfo, this.Timeout, this.RetryPolicy, this.Version));
}
}
} while (marker != null);
}
private static ListQueueResult GetQueuesFromResponse(Stream stream)
{
ListQueueResult result = null;
List<string> names = new List<string>();
List<string> urls = new List<string>();
string nextMarker = null;
XmlDocument doc = new XmlDocument();
try
{
doc.Load(stream);
}
catch (XmlException xe)
{
throw new StorageServerException(StorageErrorCode.ServiceBadResponse,
"The result of a ListQueue operation could not be parsed", default(HttpStatusCode), xe);
}
// get queue names and urls
XmlNodeList queueNameNodes = doc.SelectNodes(XPathQueryHelper.QueueListQuery);
foreach (XmlNode queueNameNode in queueNameNodes)
{
string queueName = XPathQueryHelper.LoadSingleChildStringValue(queueNameNode, StorageHttpConstants.XmlElementNames.QueueName, true);
names.Add(queueName);
string url = XPathQueryHelper.LoadSingleChildStringValue(queueNameNode, StorageHttpConstants.XmlElementNames.Url, true);
urls.Add(url);
}
// Get the nextMarker
XmlNode nextMarkerNode = doc.SelectSingleNode(XPathQueryHelper.NextMarkerQuery);
if (nextMarkerNode != null && nextMarkerNode.FirstChild != null)
{
nextMarker = nextMarkerNode.FirstChild.Value;
}
if (names.Count > 0)
{
Debug.Assert(names.Count == urls.Count);
result = new ListQueueResult(names, urls, nextMarker);
}
return result;
}
