WCF:Net.TCP多个绑定，相同的端口，不同的IP地址 [英] WCF: Net.TCP multiple bindings, same port, different IP Addresses
问题描述
我遇到了一个问题.我是WCF的新手，所以将不胜感激.
这是我的代码:
public static void StartHosts()
{
try
{
// Create a new host
ServiceHost host = new ServiceHost(typeof(ServerTasks));
List<IPAddress> ips = new List<IPAddress>(Dns.GetHostAddresses(Dns.GetHostName()));
if (IPAddress.Loopback != null)
ips.Add(IPAddress.Loopback);
ips.RemoveAll(i => i.AddressFamily != AddressFamily.InterNetwork);
foreach (var ip in ips)
{
string uri = string.Empty;
// Formulate the uri for this host
uri = string.Format(
"net.tcp://{0}:{1}/ServerTasks",
ip.ToString(),
ServerSettings.Instance.TCPListeningPort
);
// Add the endpoint binding
host.AddServiceEndpoint(
typeof(ServerTasks),
new NetTcpBinding(SecurityMode.Transport) { TransferMode = TransferMode.Streamed },
uri
);
}
// Add the meta data publishing
var smb = host.Description.Behaviors.Find<ServiceMetadataBehavior>();
if (smb == null)
smb = new ServiceMetadataBehavior();
smb.MetadataExporter.PolicyVersion = PolicyVersion.Policy15;
host.Description.Behaviors.Add(smb);
host.AddServiceEndpoint(
ServiceMetadataBehavior.MexContractName,
MetadataExchangeBindings.CreateMexTcpBinding(),
"net.tcp://localhost/ServerTasks/mex"
);
// Run the host
host.Open();
}
catch (Exception exc)
{
DebugLogger.WriteException(exc);
}
}
在行上抛出异常:'host.Open();'
例外是:
System.InvalidOperationException
已经存在URI'net.tcp://192.168.1.45:4329/ServerTasks'的注册.我想做的是绑定到计算机上的所有网络地址，以便客户端应用程序可以从他们看到的任何网络上访问该服务.当我运行此代码时，它会发现并尝试为大约5个不同的IP(包括127.0.0.1)设置绑定.
192.168.1.45是它尝试绑定到的第二个IP.在它引发异常的时候，我可以看到(使用netstat)该程序已绑定到端口4329列表中的第一个IP.在异常中提到的地址上，端口4329没有任何绑定.
对不起，没有太多细节，我想发表一个简洁的帖子.如果有人需要更多信息，我将很乐意提供.
注意:我已经尝试将在foreach循环内创建的NetTcpBinding的PortSharingEnabled设置为true，但是我仍然遇到相同的错误.
任何帮助或建议将不胜感激！
谢谢
感谢Corazza的信息！
我已经弄清楚了如何做到这一点.我本来打算用错误的方式.
我的最终目标是让服务监听计算机上可用的每个IP地址.尝试单独绑定到每个地址是错误的方法.
相反，我只需要将该服务绑定到计算机的主机名(而不是"localhost")，WCF就会自动侦听所有适配器.
这是更正的代码:
public static void StartHosts()
{
try
{
// Formulate the uri for this host
string uri = string.Format(
"net.tcp://{0}:{1}/ServerTasks",
Dns.GetHostName(),
ServerSettings.Instance.TCPListeningPort
);
// Create a new host
ServiceHost host = new ServiceHost(typeof(ServerTasks), new Uri(uri));
// Add the endpoint binding
host.AddServiceEndpoint(
typeof(ServerTasks),
new NetTcpBinding(SecurityMode.Transport)
{
TransferMode = TransferMode.Streamed
},
uri
);
// Add the meta data publishing
var smb = host.Description.Behaviors.Find<ServiceMetadataBehavior>();
if (smb == null)
smb = new ServiceMetadataBehavior();
smb.MetadataExporter.PolicyVersion = PolicyVersion.Policy15;
host.Description.Behaviors.Add(smb);
host.AddServiceEndpoint(
ServiceMetadataBehavior.MexContractName,
MetadataExchangeBindings.CreateMexTcpBinding(),
"net.tcp://localhost/ServerTasks/mex"
);
// Run the host
host.Open();
}
catch (Exception exc)
{
DebugLogger.WriteException(exc);
}
}
I've run into a problem. I'm a little new at WCF so any help would be greatly appreaciated.
Here's my code:
public static void StartHosts()
{
try
{
// Create a new host
ServiceHost host = new ServiceHost(typeof(ServerTasks));
List<IPAddress> ips = new List<IPAddress>(Dns.GetHostAddresses(Dns.GetHostName()));
if (IPAddress.Loopback != null)
ips.Add(IPAddress.Loopback);
ips.RemoveAll(i => i.AddressFamily != AddressFamily.InterNetwork);
foreach (var ip in ips)
{
string uri = string.Empty;
// Formulate the uri for this host
uri = string.Format(
"net.tcp://{0}:{1}/ServerTasks",
ip.ToString(),
ServerSettings.Instance.TCPListeningPort
);
// Add the endpoint binding
host.AddServiceEndpoint(
typeof(ServerTasks),
new NetTcpBinding(SecurityMode.Transport) { TransferMode = TransferMode.Streamed },
uri
);
}
// Add the meta data publishing
var smb = host.Description.Behaviors.Find<ServiceMetadataBehavior>();
if (smb == null)
smb = new ServiceMetadataBehavior();
smb.MetadataExporter.PolicyVersion = PolicyVersion.Policy15;
host.Description.Behaviors.Add(smb);
host.AddServiceEndpoint(
ServiceMetadataBehavior.MexContractName,
MetadataExchangeBindings.CreateMexTcpBinding(),
"net.tcp://localhost/ServerTasks/mex"
);
// Run the host
host.Open();
}
catch (Exception exc)
{
DebugLogger.WriteException(exc);
}
}
An exception is thrown on the line: 'host.Open();'
The exception is:
System.InvalidOperationException A registration already exists for URI 'net.tcp://192.168.1.45:4329/ServerTasks'.
What I'm trying to do is bind to all the network addresses on the machine so that the client applications can reach the service from whatever network they see it on. When I run this code it finds and attempts to set up a binding for about 5 different IPs, including 127.0.0.1.
192.168.1.45 is the second IP that it attempts to bind to. At the point that it throws the exception I can see (using netstat) that the program has bound to the first IP in the list on port 4329. There isn't anything bound to port 4329 on the address mentioned in the exception.
Sorry there's not a lot of details, I wanted to give a concise post. If anyone needs any more info I'll be happy to supply it.
Note: I've tried setting PortSharingEnabled to true for the NetTcpBinding that gets created inside the foreach loop, but I still experienced the same error.
Any help or advise would be greatly appreaciated!
Thanks
Thanks for the info Corazza!
I've figured out how to accomplish this. I was going about this all the wrong way.
My ultimate goal was to have the service listening on every IP Address available on the machine. Trying to bind to each address individually is the wrong way of doing this.
Instead, I only needed to bind the service to the machine's Host Name (not 'localhost') and WCF automatically listens on all adapters.
Here's the corrected code:
public static void StartHosts()
{
try
{
// Formulate the uri for this host
string uri = string.Format(
"net.tcp://{0}:{1}/ServerTasks",
Dns.GetHostName(),
ServerSettings.Instance.TCPListeningPort
);
// Create a new host
ServiceHost host = new ServiceHost(typeof(ServerTasks), new Uri(uri));
// Add the endpoint binding
host.AddServiceEndpoint(
typeof(ServerTasks),
new NetTcpBinding(SecurityMode.Transport)
{
TransferMode = TransferMode.Streamed
},
uri
);
// Add the meta data publishing
var smb = host.Description.Behaviors.Find<ServiceMetadataBehavior>();
if (smb == null)
smb = new ServiceMetadataBehavior();
smb.MetadataExporter.PolicyVersion = PolicyVersion.Policy15;
host.Description.Behaviors.Add(smb);
host.AddServiceEndpoint(
ServiceMetadataBehavior.MexContractName,
MetadataExchangeBindings.CreateMexTcpBinding(),
"net.tcp://localhost/ServerTasks/mex"
);
// Run the host
host.Open();
}
catch (Exception exc)
{
DebugLogger.WriteException(exc);
}
}
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