public override async Task <Response> Execute(Action <int> remainingTimeCallback)
{
Stream responseStream = null;
responseStream = await ServiceHelper.GetStreamAsync(new Uri(GetRequestUrl())).ConfigureAwait(false);
if (responseStream != null)
{
var r = ServiceHelper.DeserializeStream <Response>(responseStream);
responseStream.Dispose();
return(r);
}
return(null);
}
private static async Task <Response> ProcessAsyncResponse(Response response, Action <int> remainingTimeCallback)
{
if (response != null)
{
if (response.ErrorDetails != null && response.ErrorDetails.Length > 0)
{
throw new Exception(String.Join("", response.ErrorDetails));
}
if (response.ResourceSets != null && response.ResourceSets.Length > 0 && response.ResourceSets[0].Resources != null && response.ResourceSets[0].Resources.Length > 0)
{
if (response.ResourceSets[0].Resources[0] is AsyncStatus && !string.IsNullOrEmpty((response.ResourceSets[0].Resources[0] as AsyncStatus).RequestId))
{
var status = response.ResourceSets[0].Resources[0] as AsyncStatus;
status = await ServiceHelper.ProcessAsyncStatus(status, remainingTimeCallback).ConfigureAwait(false);
if (status != null && status.IsCompleted && !string.IsNullOrEmpty(status.ResultUrl))
{
try
{
using (var resultStream = await ServiceHelper.GetStreamAsync(new Uri(status.ResultUrl)).ConfigureAwait(false))
{
return(ServiceHelper.DeserializeStream <Response>(resultStream));
}
}
catch (Exception ex)
{
throw new Exception("There was an issue downloading and serializing the results. Results Download URL: " + status.ResultUrl + "\r\n" + ex.Message);
}
}
return(response);
}
else if (response.ResourceSets[0].Resources[0] is AsyncStatus && !string.IsNullOrEmpty((response.ResourceSets[0].Resources[0] as AsyncStatus).ErrorMessage))
{
throw new Exception((response.ResourceSets[0].Resources[0] as AsyncStatus).ErrorMessage);
}
else if (response.ResourceSets[0].Resources[0] is Resource && !(response.ResourceSets[0].Resources[0] is AsyncStatus))
{
return(response);
}
}
}
throw new Exception("No response returned by service.");
}
/// <summary>
/// Processes a REST requests that returns an image stream.
/// </summary>
/// <param name="imageryRequest">The REST request to process.</param>
/// <returns>A stream containing an image.</returns>
public static async Task <Stream> GetImageAsync(BaseImageryRestRequest imageryRequest)
{
if (imageryRequest is ImageryRequest)
{
var r = imageryRequest as ImageryRequest;
r.GetMetadata = false;
if (r.Pushpins != null && (r.Pushpins.Count > 18 || r.Style != null))
{
//Make a post request when there are more than 18 pushpins as there is a risk of URL becoming too large for a GET request.
return(await ServiceHelper.PostStringAsync(new Uri(r.GetPostRequestUrl()), r.GetPushpinsAsString(), null).ConfigureAwait(false));
}
else
{
return(await ServiceHelper.GetStreamAsync(new Uri(r.GetRequestUrl())).ConfigureAwait(false));
}
}
else
{
return(await ServiceHelper.GetStreamAsync(new Uri(imageryRequest.GetRequestUrl())).ConfigureAwait(false));
}
}
/// <summary>
/// Executes the request.
/// </summary>
/// <param name="remainingTimeCallback">A callback function in which the estimated remaining time in seconds is sent.</param>
/// <returns>A response containing the requested data.</returns>
public override async Task <Response> Execute(Action <int> remainingTimeCallback)
{
Stream responseStream = null;
if (Points != null && Points.Count > 50)
{
//Make a post request when there are more than 50 points as there is a risk of URL becoming too large for a GET request.
responseStream = await ServiceHelper.PostStringAsync(new Uri(GetPostRequestUrl()), GetPointsAsString(), null);
}
else
{
responseStream = await ServiceHelper.GetStreamAsync(new Uri(GetRequestUrl()));
}
if (responseStream != null)
{
var r = ServiceHelper.DeserializeStream <Response>(responseStream);
responseStream.Dispose();
return(r);
}
return(null);
}
/// <summary>
/// Executes the request.
/// </summary>
/// <param name="remainingTimeCallback">A callback function in which the estimated remaining time is sent.</param>
/// <returns>A response containing the requested distance matrix.</returns>
public override async Task <Response> Execute(Action <int> remainingTimeCallback)
{
//Make sure all origins and destinations are geocoded.
await GeocodeWaypoints();
var requestUrl = GetRequestUrl();
var requestBody = GetPostRequestBody();
Response response = null;
using (var responseStream = await ServiceHelper.PostStringAsync(new Uri(requestUrl), requestBody, "application/json"))
{
response = ServiceHelper.DeserializeStream <Response>(responseStream);
}
if (response != null && response.ErrorDetails != null && response.ErrorDetails.Length > 0)
{
throw new Exception("Error: " + response.ErrorDetails[0]);
}
if (response != null && response.ResourceSets != null && response.ResourceSets.Length > 0 && response.ResourceSets[0].Resources != null && response.ResourceSets[0].Resources.Length > 0)
{
if (response.ResourceSets[0].Resources[0] is DistanceMatrixAsyncStatus && !string.IsNullOrEmpty((response.ResourceSets[0].Resources[0] as DistanceMatrixAsyncStatus).RequestId))
{
var status = response.ResourceSets[0].Resources[0] as DistanceMatrixAsyncStatus;
var statusUrl = new Uri(status.CallbackUrl);
//var statusUrl = new Uri(this.Domain + "Routes/DistanceMatrixAsyncCallback?requestId=" + status.RequestId + "&key=" + this.BingMapsKey);
if (status.CallbackInSeconds > 0 || !status.IsCompleted || string.IsNullOrEmpty(status.ResultUrl))
{
remainingTimeCallback?.Invoke(status.CallbackInSeconds);
//Wait remaining seconds.
await Task.Delay(TimeSpan.FromSeconds(status.CallbackInSeconds));
status = await MonitorAsyncStatus(statusUrl, 0, remainingTimeCallback);
}
if (status != null)
{
if (status.IsCompleted && !string.IsNullOrEmpty(status.ResultUrl))
{
try
{
using (var resultStream = await ServiceHelper.GetStreamAsync(new Uri(status.ResultUrl)))
{
DistanceMatrix dm = ServiceHelper.DeserializeStream <DistanceMatrix>(resultStream);
response.ResourceSets[0].Resources[0] = dm;
//TODO: Overwrite origins/destinations for now as we have added support for geocoding in this library, but this is not yet supported by the Distance Matirx API.
dm.Origins = this.Origins.ToArray();
dm.Destinations = this.Destinations.ToArray();
}
}
catch (Exception ex)
{
response.ResourceSets[0].Resources[0] = new DistanceMatrix()
{
ErrorMessage = "There was an issue downloading and serializing the results. Results Download URL: " + status.ResultUrl
};
}
}
else if (!status.IsAccepted)
{
response.ResourceSets[0].Resources[0] = new DistanceMatrix()
{
ErrorMessage = "The request was not accepted."
};
}
else if (!string.IsNullOrEmpty(status.ErrorMessage))
{
response.ResourceSets[0].Resources[0] = new DistanceMatrix()
{
ErrorMessage = status.ErrorMessage
};
}
}
return(response);
}
else if (response.ResourceSets[0].Resources[0] is DistanceMatrix && (response.ResourceSets[0].Resources[0] as DistanceMatrix).Results != null)
{
DistanceMatrix dm = response.ResourceSets[0].Resources[0] as DistanceMatrix;
//TODO: Overwrite origins/destinations for now as we have added support for geocoding in this library, but this is not yet supported by the Distance Matirx API.
dm.Origins = this.Origins.ToArray();
dm.Destinations = this.Destinations.ToArray();
if (dm.Results != null)
{
return(response);
}
else if (!string.IsNullOrEmpty(dm.ErrorMessage))
{
var msg = "Error: " + (response.ResourceSets[0].Resources[0] as DistanceMatrix).ErrorMessage;
throw new Exception(msg);
}
}
else if (response.ResourceSets[0].Resources[0] is DistanceMatrixAsyncStatus && !string.IsNullOrEmpty((response.ResourceSets[0].Resources[0] as DistanceMatrixAsyncStatus).ErrorMessage))
{
var msg = "Error: " + (response.ResourceSets[0].Resources[0] as DistanceMatrixAsyncStatus).ErrorMessage;
throw new Exception(msg);
}
else if (response.ResourceSets[0].Resources[0] is DistanceMatrix && !string.IsNullOrEmpty((response.ResourceSets[0].Resources[0] as DistanceMatrix).ErrorMessage))
{
var msg = "Error: " + (response.ResourceSets[0].Resources[0] as DistanceMatrix).ErrorMessage;
throw new Exception(msg);
}
}
return(null);
}
/// <summary>
/// Executes the request. If there are more waypoints than the batchSize value (default 25), only a MaxSolutions is set to 1, and Tolerances is set to null.
/// </summary>
/// <param name="remainingTimeCallback">A callback function in which the estimated remaining time in seconds is sent.</param>
/// <returns>A response containing the requested data.</returns>
public override async Task <Response> Execute(Action <int> remainingTimeCallback)
{
Response response = null;
if (WaypointOptimization != null && WaypointOptimization.HasValue && Waypoints.Count >= 2)
{
var wpHash = ServiceHelper.GetSequenceHashCode <SimpleWaypoint>(Waypoints);
var optionHash = Enum.GetName(typeof(TspOptimizationType), WaypointOptimization);
var mode = TravelModeType.Driving;
DateTime?depart = null;
if (RouteOptions != null)
{
optionHash += "|" + Enum.GetName(typeof(RouteTimeType), RouteOptions.TimeType);
if (RouteOptions.TimeType == RouteTimeType.Departure && RouteOptions.DateTime != null && RouteOptions.DateTime.HasValue)
{
depart = RouteOptions.DateTime;
optionHash += "|" + RouteOptions.DateTime.ToString();
}
mode = RouteOptions.TravelMode;
optionHash += "|" + Enum.GetName(typeof(TravelModeType), mode);
}
else
{
optionHash += "|" + Enum.GetName(typeof(RouteTimeType), RouteTimeType.Departure);
}
//Check to see if the waypoints have changed since they were last optimized.
if (waypointsHash != wpHash || string.Compare(optimizationOptionHash, optionHash) != 0)
{
var tspResult = await TravellingSalesmen.Solve(Waypoints, mode, WaypointOptimization, depart, BingMapsKey);
Waypoints = tspResult.OptimizedWaypoints;
//Update the stored hashes to prevent unneeded optimizations in the future if not needed.
waypointsHash = ServiceHelper.GetSequenceHashCode <SimpleWaypoint>(Waypoints);
optimizationOptionHash = optionHash;
}
}
var requestUrl = GetRequestUrl();
if (RouteOptions != null && RouteOptions.TravelMode == TravelModeType.Truck)
{
var requestBody = GetTruckPostRequestBody();
response = await ServiceHelper.MakeAsyncPostRequest <Route>(requestUrl, requestBody, remainingTimeCallback);
}
else
{
if (Waypoints.Count <= batchSize)
{
using (var responseStream = await ServiceHelper.GetStreamAsync(new Uri(requestUrl)))
{
return(ServiceHelper.DeserializeStream <Response>(responseStream));
}
}
//There is more waypoints than the batchSize value (default 25), break it up into multiple requests. Only allow a single route in the response and no tolerances.
if (RouteOptions != null)
{
if (RouteOptions.MaxSolutions > 1)
{
RouteOptions.MaxSolutions = 1;
}
RouteOptions.Tolerances = null;
}
if (Waypoints == null)
{
throw new Exception("Waypoints not specified.");
}
else if (Waypoints.Count < 2)
{
throw new Exception("Not enough Waypoints specified.");
}
else if (Waypoints[0].IsViaPoint || Waypoints[Waypoints.Count - 1].IsViaPoint)
{
throw new Exception("Start and end waypoints must not be ViaWaypoints.");
}
int startIdx = 0;
int endIdx = 0;
var requestUrls = new List <string>();
while (endIdx < Waypoints.Count - 1)
{
requestUrls.Add(GetRequestUrl(startIdx, out endIdx));
startIdx = endIdx - 1;
}
var routes = new Route[requestUrls.Count];
Response errorResponse = null;
Parallel.For(0, requestUrls.Count, (i) =>
{
try
{
//Make the call synchronously as we are in a parrallel for loop and need this to block, otherwise the for loop will exist before the async code has completed.
using (var responseStream = ServiceHelper.GetStreamAsync(new Uri(requestUrls[i])).GetAwaiter().GetResult())
{
var r = ServiceHelper.DeserializeStream <Response>(responseStream);
if (r != null)
{
if (r.ErrorDetails != null && r.ErrorDetails.Length > 0)
{
errorResponse = r;
}
else if (r.ResourceSets != null && r.ResourceSets.Length > 0 &&
r.ResourceSets[0].Resources != null && r.ResourceSets[0].Resources.Length > 0)
{
routes[i] = r.ResourceSets[0].Resources[0] as Route;
}
}
if (i == 0)
{
response = r;
}
}
}
catch (Exception ex)
{
errorResponse = new Response()
{
ErrorDetails = new string[]
{
ex.Message
}
};
}
});
//If any of the responses failed to process, do not merge results, return the error info.
if (errorResponse != null)
{
return(errorResponse);
}
response.ResourceSets[0].Resources[0] = await MergeRoutes(routes);
}
return(response);
}
/// <summary>
/// Monitors the status of an async request.
/// </summary>
/// <param name="statusUrl">The status URL for the async request.</param>
/// <param name="failedTries">The number of times the status check has failed consecutively.</param>
/// <param name="remainingTimeCallback">A callback function in which the estimated remaining time in seconds is sent.</param>
/// <returns>The final async status when the request completed, had an error, or was not accepted.</returns>
private static async Task <AsyncStatus> MonitorAsyncStatus(Uri statusUrl, int failedTries, Action <int> remainingTimeCallback)
{
AsyncStatus status = null;
try
{
using (var rs = await ServiceHelper.GetStreamAsync(statusUrl).ConfigureAwait(false))
{
var r = ServiceHelper.DeserializeStream <Response>(rs);
if (r != null)
{
if (r.ErrorDetails != null && r.ErrorDetails.Length > 0)
{
throw new Exception(r.ErrorDetails[0]);
}
else if (Response.HasResource(r))
{
var res = Response.GetFirstResource(r);
if (res is AsyncStatus)
{
status = res as AsyncStatus;
if (!status.IsCompleted && status.CallbackInSeconds > 0)
{
remainingTimeCallback?.Invoke(status.CallbackInSeconds);
//Wait remaining seconds.
await Task.Delay(TimeSpan.FromSeconds(status.CallbackInSeconds)).ConfigureAwait(false);
return(await MonitorAsyncStatus(statusUrl, 0, remainingTimeCallback).ConfigureAwait(false));
}
}
else if (res is OptimizeItinerary)
{
var oi = res as OptimizeItinerary;
status = new AsyncStatus()
{
CallbackInSeconds = -1,
IsCompleted = oi.IsCompleted,
IsAccepted = oi.IsAccepted,
CallbackUrl = statusUrl.OriginalString,
ResultUrl = oi.IsCompleted ? statusUrl.OriginalString: null,
};
}
else
{
var t = "";
}
}
}
}
}
catch (Exception ex)
{
//Check to see how many times the status check has failed consecutively.
if (failedTries < MaxStatusCheckRetries)
{
//Wait some time and try again.
await Task.Delay(TimeSpan.FromSeconds(StatusCheckRetryDelay)).ConfigureAwait(false);
return(await MonitorAsyncStatus(statusUrl, failedTries + 1, remainingTimeCallback).ConfigureAwait(false));
}
else
{
status = new AsyncStatus()
{
ErrorMessage = "Failed to get status, and exceeded the maximium of " + MaxStatusCheckRetries + " retries. Error message: " + ex.Message,
CallbackInSeconds = -1,
IsCompleted = false
};
}
}
//Should only get here is the request has completed, was not accepted or there was an error.
return(status);
}
//TODO: this is temporary until distance matrix Async response updated.
private static async Task <Response> ProcessAsyncResponse <T>(Response response, Action <int> remainingTimeCallback) where T : Resource
{
if (response != null)
{
if (response.ErrorDetails != null && response.ErrorDetails.Length > 0)
{
throw new Exception(String.Join("", response.ErrorDetails));
}
if (Response.HasResource(response))
{
var res = Response.GetFirstResource(response);
if (res is AsyncStatus && !string.IsNullOrEmpty((res as AsyncStatus).RequestId))
{
var status = res as AsyncStatus;
status = await ServiceHelper.ProcessAsyncStatus(status, remainingTimeCallback).ConfigureAwait(false);
if (status != null && status.IsCompleted && !string.IsNullOrEmpty(status.ResultUrl))
{
try
{
using (var resultStream = await ServiceHelper.GetStreamAsync(new Uri(status.ResultUrl)).ConfigureAwait(false))
{
if (typeof(T) == typeof(DistanceMatrix))
{
//There is a bug in the distance matrix service that when some options are set, the response isn't wrapped with a resourceSet->resources like all other services.
using (var sr = new StreamReader(resultStream))
{
var r = sr.ReadToEnd();
//Remove first character from string.
r = r.Remove(0, 1);
//Add namespace type to JSON object.
r = "{\"__type\":\"DistanceMatrix:http://schemas.microsoft.com/search/local/ws/rest/v1\"," + r;
var bytes = Encoding.UTF8.GetBytes(r);
using (var stream = new MemoryStream(bytes))
{
var resource = ServiceHelper.DeserializeStream <T>(stream);
response.ResourceSets[0].Resources[0] = resource;
}
}
}
else if (typeof(T) == typeof(SnapToRoadResponse))
{
//Snap to road for some reason includes a full resource set response while other async services don't.
response = ServiceHelper.DeserializeStream <Response>(resultStream);
}
else
{
var resource = ServiceHelper.DeserializeStream <T>(resultStream);
response.ResourceSets[0].Resources[0] = resource;
}
}
}
catch (Exception ex)
{
throw new Exception("There was an issue downloading and serializing the results. Results Download URL: " + status.ResultUrl + "\r\n" + ex.Message);
}
}
return(response);
}
else if (res is AsyncStatus && !string.IsNullOrEmpty((res as AsyncStatus).ErrorMessage))
{
throw new Exception((res as AsyncStatus).ErrorMessage);
}
else if (res is Resource && !(res is AsyncStatus))
{
return(response);
}
}
}
throw new Exception("No response returned by service.");
}
/// <summary>
/// Executes the request. If there are more waypoints than the batchSize value (default 25), only a MaxSolutions is set to 1, and Tolerances is set to null.
/// </summary>
/// <param name="remainingTimeCallback">A callback function in which the estimated remaining time in seconds is sent.</param>
/// <returns>A response containing the requested data.</returns>
public override async Task <Response> Execute(Action <int> remainingTimeCallback)
{
Response response = null;
if (WaypointOptimization != null && WaypointOptimization.HasValue && Waypoints.Count >= 2)
{
var wpHash = ServiceHelper.GetSequenceHashCode <SimpleWaypoint>(Waypoints);
var optionHash = Enum.GetName(typeof(TspOptimizationType), WaypointOptimization);
var mode = TravelModeType.Driving;
DateTime?depart = null;
if (RouteOptions != null)
{
optionHash += "|" + Enum.GetName(typeof(RouteTimeType), RouteOptions.TimeType);
if (RouteOptions.TimeType == RouteTimeType.Departure && RouteOptions.DateTime != null && RouteOptions.DateTime.HasValue)
{
depart = RouteOptions.DateTime;
optionHash += "|" + RouteOptions.DateTime.ToString();
}
mode = RouteOptions.TravelMode;
optionHash += "|" + Enum.GetName(typeof(TravelModeType), mode);
}
else
{
optionHash += "|" + Enum.GetName(typeof(RouteTimeType), RouteTimeType.Departure);
}
//Check to see if the waypoints have changed since they were last optimized.
if (waypointsHash != wpHash || string.Compare(optimizationOptionHash, optionHash) != 0)
{
var tspResult = await TravellingSalesmen.Solve(Waypoints, mode, WaypointOptimization, depart, BingMapsKey);
Waypoints = tspResult.OptimizedWaypoints;
//Update the stored hashes to prevent unneeded optimizations in the future if not needed.
waypointsHash = ServiceHelper.GetSequenceHashCode <SimpleWaypoint>(Waypoints);
optimizationOptionHash = optionHash;
}
}
var requestUrl = GetRequestUrl();
int startIdx = 0;
int endIdx = 0;
if (Waypoints.Count <= batchSize)
{
if (RouteOptions != null && RouteOptions.TravelMode == TravelModeType.Truck)
{
var requestBody = GetTruckPostRequestBody(startIdx, out endIdx);
response = await ServiceHelper.MakeAsyncPostRequest(requestUrl, requestBody, remainingTimeCallback);
}
else
{
remainingTimeCallback?.Invoke(1);
using (var responseStream = await ServiceHelper.GetStreamAsync(new Uri(requestUrl)))
{
response = ServiceHelper.DeserializeStream <Response>(responseStream);
}
}
}
else
{
//There is more waypoints than the batchSize value (default 25), break it up into multiple requests. Only allow a single route in the response and no tolerances.
if (RouteOptions != null)
{
if (RouteOptions.MaxSolutions > 1)
{
RouteOptions.MaxSolutions = 1;
}
RouteOptions.Tolerances = null;
}
if (Waypoints == null)
{
throw new Exception("Waypoints not specified.");
}
else if (Waypoints.Count < 2)
{
throw new Exception("Not enough Waypoints specified.");
}
else if (Waypoints[0].IsViaPoint || Waypoints[Waypoints.Count - 1].IsViaPoint)
{
throw new Exception("Start and end waypoints must not be ViaWaypoints.");
}
var requestUrls = new List <string>();
var requestBodies = new List <string>();
while (endIdx < Waypoints.Count - 1)
{
if (RouteOptions != null && RouteOptions.TravelMode == TravelModeType.Truck)
{
requestUrls.Add(requestUrl);
requestBodies.Add(GetTruckPostRequestBody(startIdx, out endIdx));
}
else
{
requestUrls.Add(GetRequestUrl(startIdx, out endIdx));
requestBodies.Add(null);
}
startIdx = endIdx - 1;
}
if (remainingTimeCallback != null)
{
int batchProcessingTime = (int)Math.Ceiling((double)requestUrls.Count / (double)ServiceManager.QpsLimit);
if (RouteOptions != null && RouteOptions.TravelMode == TravelModeType.Truck)
{
//Use an average of 4 seconds per batch for processing truck routes as multiplier for the processing time.
//Other routes typically take less than a second and as such 1 second is used for those but isn't needed as a multiplier.
batchProcessingTime *= 4;
}
remainingTimeCallback(batchProcessingTime);
}
var routes = new Route[requestUrls.Count];
var routeTasks = new List <Task>();
for (var i = 0; i < routes.Length; i++)
{
routeTasks.Add(CalculateRoute(requestUrls[i], requestBodies[i], i, routes));
}
if (routeTasks.Count > 0)
{
await ServiceHelper.WhenAllTaskLimiter(routeTasks);
}
try
{
response = new Response()
{
StatusCode = 200,
StatusDescription = "OK",
ResourceSets = new ResourceSet[]
{
new ResourceSet()
{
Resources = new Resource[]
{
await MergeRoutes(routes)
}
}
}
};
}
catch (Exception ex)
{
return(new Response()
{
StatusCode = 500,
StatusDescription = "Error",
ErrorDetails = new string[]
{
ex.Message
}
});
}
}
return(response);
}
/// <summary>
/// Executes the request. If there are more waypoints than the batchSize value (default 25), only a MaxSolutions is set to 1, and Tolerances is set to null.
/// </summary>
/// <param name="remainingTimeCallback">A callback function in which the estimated remaining time is sent.</param>
/// <returns>A response containing the requested data.</returns>
public override async Task <Response> Execute(Action <int> remainingTimeCallback)
{
if (Waypoints.Count <= batchSize)
{
using (var responseStream = await ServiceHelper.GetStreamAsync(new Uri(GetRequestUrl())))
{
return(ServiceHelper.DeserializeStream <Response>(responseStream));
}
}
//There is more waypoints than the batchSize value (default 25), break it up into multiple requests. Only allow a single route in the response and no tolerances.
if (RouteOptions != null)
{
if (RouteOptions.MaxSolutions > 1)
{
RouteOptions.MaxSolutions = 1;
}
RouteOptions.Tolerances = null;
}
if (Waypoints == null)
{
throw new Exception("Waypoints not specified.");
}
else if (Waypoints.Count < 2)
{
throw new Exception("Not enough Waypoints specified.");
}
else if (Waypoints[0].IsViaPoint || Waypoints[Waypoints.Count - 1].IsViaPoint)
{
throw new Exception("Start and end waypoints must not be ViaWaypoints.");
}
int startIdx = 0;
int endIdx = 0;
var requestUrls = new List <string>();
while (endIdx < Waypoints.Count - 1)
{
requestUrls.Add(GetRequestUrl(startIdx, out endIdx));
startIdx = endIdx - 1;
}
var routes = new Route[requestUrls.Count];
Response response = null;
Response errorResponse = null;
Parallel.For(0, requestUrls.Count, (i) =>
{
try
{
//Make the call synchronously as we are in a parrallel for loop and need this to block, otherwise the for loop will exist before the async code has completed.
using (var responseStream = ServiceHelper.GetStreamAsync(new Uri(requestUrls[i])).GetAwaiter().GetResult())
{
var r = ServiceHelper.DeserializeStream <Response>(responseStream);
if (r != null)
{
if (r.ErrorDetails != null && r.ErrorDetails.Length > 0)
{
errorResponse = r;
}
else if (r.ResourceSets != null && r.ResourceSets.Length > 0 &&
r.ResourceSets[0].Resources != null && r.ResourceSets[0].Resources.Length > 0)
{
routes[i] = r.ResourceSets[0].Resources[0] as Route;
}
}
if (i == 0)
{
response = r;
}
}
}
catch (Exception ex)
{
errorResponse = new Response()
{
ErrorDetails = new string[]
{
ex.Message
}
};
}
});
//If any of the responses failed to process, do not merge results, return the error info.
if (errorResponse != null)
{
return(errorResponse);
}
response.ResourceSets[0].Resources[0] = await MergeRoutes(routes);
return(response);
}
