Beispiel #1
0
        private async Task<HttpResponseMessage> SetContainerLease(CloudBlobContainer container)
        {
            IEnumerable<string> action;
            string leaseId = null;
            string proposedLeaseId = null;
            HttpResponseMessage response = new HttpResponseMessage();
            AccessCondition condition;
            string serverLeaseId;
            await AddBasicContainerHeaders(response, container);
            //If an action is not provided, it's not a valid call.
            if (!Request.Headers.TryGetValues("x-ms-lease-action", out action))
            {
                response.StatusCode = HttpStatusCode.BadRequest;
                return response;
            }
            if (Request.Headers.Contains("x-ms-lease-id"))
            {
                leaseId = Request.Headers.GetValues("x-ms-lease-id").FirstOrDefault();
            }
            if (Request.Headers.Contains("x-ms-proposed-lease-id"))
            {
                proposedLeaseId = Request.Headers.GetValues("x-ms-proposed-lease-id").FirstOrDefault();
            }
            
            switch (action.First().ToLower())
            {
                case "acquire":
                    int leaseDuration = Int32.Parse(Request.Headers.GetValues("x-ms-lease-duration").First());
                    TimeSpan? leaseDurationSpan;
                    if (leaseDuration == -1)
                    {
                        leaseDurationSpan = null;
                    }
                    else if (leaseDuration >= 15 && leaseDuration <= 60)
                    {
                        leaseDurationSpan = new TimeSpan(0, 0, leaseDuration);
                    }
                    else
                    {
                        response.StatusCode = HttpStatusCode.BadRequest;
                        return response;
                    }
                    serverLeaseId = await container.AcquireLeaseAsync(leaseDurationSpan, proposedLeaseId);
                    response = new DelegatedResponse(await ContainerHandler.DoForDataContainersAsync(container.Name, 
                        HttpStatusCode.Created, 
                        async containerObj => await containerObj.AcquireLeaseAsync(leaseDurationSpan, serverLeaseId),
                        true)).CreateResponse();
                    await AddBasicContainerHeaders(response, container);
                    response.Headers.Add("x-ms-lease-id", serverLeaseId);
                    return response;

                case "renew":
                    condition = new AccessCondition()
                    {
                        LeaseId = leaseId
                    };
                    response = new DelegatedResponse(await ContainerHandler.DoForAllContainersAsync(container.Name, 
                        HttpStatusCode.OK, 
                        async containerObj => await containerObj.RenewLeaseAsync(condition),
                        true)).CreateResponse();
                    await AddBasicContainerHeaders(response, container);
                    response.Headers.Add("x-ms-lease-id", leaseId);
                    return response;

                case "change":
                    condition = new AccessCondition()
                    {
                        LeaseId = leaseId
                    };
                    serverLeaseId = await container.ChangeLeaseAsync(proposedLeaseId, condition);
                    response = new DelegatedResponse(await ContainerHandler.DoForDataContainersAsync(container.Name, 
                        HttpStatusCode.OK, 
                        async containerObj => await containerObj.ChangeLeaseAsync(proposedLeaseId, condition),
                        true)).CreateResponse();
                    await AddBasicContainerHeaders(response, container);
                    response.Headers.Add("x-ms-lease-id", container.ChangeLease(proposedLeaseId, condition));
                    return response;

                case "release":
                    condition = new AccessCondition()
                    {
                        LeaseId = leaseId
                    };
                    response = new DelegatedResponse(await ContainerHandler.DoForAllContainersAsync(container.Name, 
                        HttpStatusCode.OK, 
                        async containerObj => await containerObj.ReleaseLeaseAsync(condition),
                        true)).CreateResponse();
                    await AddBasicContainerHeaders(response, container);
                    return response;

                case "break":
                    int breakDuration = 0;
                    if (Request.Headers.Contains("x-ms-lease-break-period"))
                    {
                        breakDuration = Int32.Parse(Request.Headers.GetValues("x-ms-lease-break-period").FirstOrDefault());
                    }
                    TimeSpan breakDurationSpan = new TimeSpan(0, 0, breakDuration);
                    TimeSpan remainingTime = await container.BreakLeaseAsync(breakDurationSpan);
                    response = new DelegatedResponse(await ContainerHandler.DoForDataContainersAsync(container.Name, 
                        HttpStatusCode.Accepted, 
                        async containerObj => await containerObj.BreakLeaseAsync(breakDurationSpan),
                        true)).CreateResponse();
                    await AddBasicContainerHeaders(response, container);
                    response.Headers.Add("x-ms-lease-time", remainingTime.Seconds.ToString());
                    return response;

                default:
                    //Not a recognized action
                    response.StatusCode = HttpStatusCode.BadRequest;
                    return response;
            }
        }