[英]Downloading a file in a C# Ajax application does not work when deployed to server. Running locally is fine and has no issues
[英]Google Map Direction Api Works Fine Locally but does not work properly when deployed on Server
我正在尝试通过使用c#在Web服务中调用Google Map API XML来获取源与目的地之间的路线详细信息。 当我尝试在本地调用以下函数时,它可以正常工作。 但是,当我在服务器上的某些位置部署代码时,它没有提供方向详细信息。 我尝试的本地系统是Win2K8 R2,Web服务器是Win2K3。 这是我的代码
public List<DirectionSteps> getDistance(string sourceLat, string sourceLong, string destLat, string destLong)
{
var requestUrl = String.Format("http://maps.google.com/maps/api/directions/xml?origin=" + sourceLat + "," + sourceLong + "&destination=" + destLat + "," + destLong + "&sensor=false&units=metric");
try
{
var client = new WebClient();
var result = client.DownloadString(requestUrl);
//return ParseDirectionResults(result);
var directionStepsList = new List<DirectionSteps>();
var xmlDoc = new System.Xml.XmlDocument { InnerXml = result };
if (xmlDoc.HasChildNodes)
{
var directionsResponseNode = xmlDoc.SelectSingleNode("DirectionsResponse");
if (directionsResponseNode != null)
{
var statusNode = directionsResponseNode.SelectSingleNode("status");
if (statusNode != null && statusNode.InnerText.Equals("OK"))
{
var legs = directionsResponseNode.SelectNodes("route/leg");
foreach (System.Xml.XmlNode leg in legs)
{
//int stepCount = 1;
var stepNodes = leg.SelectNodes("step");
var steps = new List<DirectionStep>();
foreach (System.Xml.XmlNode stepNode in stepNodes)
{
var directionStep = new DirectionStep();
directionStep.Index = stepCount++;
directionStep.Distance = stepNode.SelectSingleNode("distance/text").InnerText;
directionStep.Duration = stepNode.SelectSingleNode("duration/text").InnerText;
directionStep.Description = Regex.Replace(stepNode.SelectSingleNode("html_instructions").InnerText, "<[^<]+?>", "");
steps.Add(directionStep);
}
var directionSteps = new DirectionSteps();
//directionSteps.OriginAddress = leg.SelectSingleNode("start_address").InnerText;
//directionSteps.DestinationAddress = leg.SelectSingleNode("end_address").InnerText;
directionSteps.TotalDistance = leg.SelectSingleNode("distance/text").InnerText;
directionSteps.TotalDuration = leg.SelectSingleNode("duration/text").InnerText;
directionSteps.Steps = steps;
directionStepsList.Add(directionSteps);
}
}
}
}
return directionStepsList;
}
catch (Exception ex)
{
throw ex;
}
}
在阅读了许多帖子和Google使用政策后,事实证明Google不允许从FQDN或任何公共服务器进行此类自动查询。 我提出了大约15-20个方向请求,在大约10个请求后被阻止。 我不得不改变我的逻辑,并在移动设备中实现了相同的功能,并从移动电话中调用了Google Maps Directions API,它的运行效果非常好! 看来Google并未阻止来自移动设备的此类请求。 但是您永远都不知道他们何时将其改回。
您可以使用Google Maps API http://maps.googleapis.com/maps/api/directions/
这里的说明: https : //developers.google.com/maps/documentation/directions/
限制:
每天2,500个路线请求。
Google Maps API for Business客户有更高的限制:
每天有100,000个路线请求。
每个请求中允许有23个航路点。
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