为什么我的UPnP设备不返回在UPnP SCPD xml文件中注册的服务？

时间：2012-06-13 10:04:49

标签： windows delphi upnp

我注册了一个UPnP设备：

var o: IUPnPRegistrar;
    W: string;
    R: HRESULT;
begin
  w := TFile.ReadAllText('UPnPDevice_Desc.xml');
  o := CoUPnPRegistrar.Create as IUPnPRegistrar;
  R := o.RegisterDevice(w, ...);
end;

文件UPnPDevice_Desc.xml：

<?xml version="1.0"?>
<root xmlns="urn:schemas-upnp-org:device-1-0">
<specVersion>
    <major>1</major>
    <minor>0</minor>
</specVersion>

<device>
    <pnpx:X_deviceCategory xmlns:pnpx="http://schemas.microsoft.com/windows/pnpx/2005/11">Other</pnpx:X_deviceCategory>
<!--<pnpx:X_hardwareId xmlns:pnpx="http://schemas.microsoft.com/windows/pnpx/2005/11">Microsoft/SampleDevice/10000/urn:microsoft-com:device:SampleDimmerDevice:1</pnpx:X_hardwareId>-->
<!--    <df:X_containerId xmlns:df="http://schemas.microsoft.com/windows/2008/09/devicefoundation">{8C7B310D-90F8-40D4-B5EA-71D81821DEA6}</df:X_containerId>-->
    <deviceType>urn:example-com:device:uPnPDevice:1</deviceType>
    <friendlyName>My UPNP Device Hosted by Windows</friendlyName>
    <manufacturer>Example Company</manufacturer>
    <manufacturerURL>http://www.example.com/</manufacturerURL>
    <modelDescription>My UPnP Device</modelDescription>
    <modelName>uPnPDevice</modelName>
    <modelNumber>1001</modelNumber>
    <modelURL>http://www.example.com/</modelURL>
    <serialNumber>123456</serialNumber>
    <UDN>uuid:RootDevice</UDN>
    <UPC>00000-00001</UPC>

    <serviceList>
      <service>
        <serviceType>urn:schemas-upnp-org:service:SwitchPower:1</serviceType>
        <serviceId>urn:upnp-org:serviceId:SwitchPower:1</serviceId>
        <controlURL></controlURL>
        <eventSubURL></eventSubURL>
        <SCPDURL>UPnPDevice_SCPD.xml</SCPDURL>
      </service>
    </serviceList>

    <presentationURL>DimmerPresentation.htm</presentationURL>
</device>
</root>

文件UPnPDevice_SCPD.xml：

<scpd xmlns="urn:schemas-upnp-org:service-1-0">
<specVersion>
    <major>1</major>
    <minor>0</minor>
</specVersion>
<actionList>
    <action>
        <name>MagicOn</name>
    </action>
</actionList>
<serviceStateTable>
    <stateVariable>
        <name>OSMajorVersion</name>
        <dataType>i4</dataType>
    </stateVariable>
    <stateVariable>
        <name>OSMinorVersion</name>
        <dataType>i4</dataType>
    </stateVariable>
    <stateVariable>
        <name>OSBuildNumber</name>
        <dataType>i4</dataType>
    </stateVariable>
    <stateVariable>
        <name>OSMachineName</name>
        <dataType>string</dataType>
    </stateVariable>
</serviceStateTable>
</scpd>

通过使用IUPnPDeviceFinder或M-SEARCH查找设备，我可以确认UPnP设备已托管在UPnP设备主机服务中。

注册表

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\UPnP Device Host\Description

还包含相应的信息：

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\UPnP Device Host\Description\{00BB4949-F3B2-4F5A-B534-C6FE61B71F4E}]

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\UPnP Device Host\Description\{00BB4949-F3B2-4F5A-B534-C6FE61B71F4E}\Files]

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\UPnP Device Host\Description\{00BB4949-F3B2-4F5A-B534-C6FE61B71F4E}\Files\{B11E040A-6858-48BA-B1BD-85B4E8FCBA73}]
"Filename"="M:\\uPNP\\D16\\Win32\\Debug\\UPnPDevice_SCPD.xml"
"Mimetype"="text/xml; charset=\"utf-8\""

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\UPnP Device Host\Description\{00BB4949-F3B2-4F5A-B534-C6FE61B71F4E}\UDN Mappings]

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\UPnP Device Host\Description\{00BB4949-F3B2-4F5A-B534-C6FE61B71F4E}\UDN Mappings\uuid:RootDevice]
@="uuid:00bb4949-f3b2-4f5a-b534-c6fe61b71f4e"

使用

查询UPnP设备的服务时 
var Enum: IEnumVARIANT;
    Fetched: Cardinal;
    K: OleVariant;
    P: IUPnPService;
    W: WideString;
    D: IUPnPDevice
begin
  ...
  if D.Services.Count > 0 then begin
    Enum := D.Services._NewEnum as IEnumVARIANT;
    Enum.Reset;
    while Enum.Next(1, K, Fetched) = S_OK do begin
      P := IDispatch(K) as IUPnPService;
    end;
  end;
end;

D.Services.Count为1，但Enum不提取任何服务。变量提取始终返回0.

如果我查询了Media Player UPnP设备，它确实返回了可用的服务。

我的UPnP设备有什么问题没有返回SCPD xml文件中指示的服务？

注册设备后，XML说明将更改为：

<root xmlns="urn:schemas-upnp-org:device-1-0">
    <specVersion>
        <major>1</major>
        <minor>0</minor>
    </specVersion>

    <device>
        <pnpx:X_deviceCategory xmlns:pnpx="http://schemas.microsoft.com/windows/pnpx/2005/11">Other</pnpx:X_deviceCategory>
<!--
<pnpx:X_hardwareId xmlns:pnpx="http://schemas.microsoft.com/windows/pnpx/2005/11">Microsoft/SampleDevice/10000/urn:microsoft-com:device:SampleDimmerDevice:1</pnpx:X_hardwareId>
-->
<!--
<df:X_containerId xmlns:df="http://schemas.microsoft.com/windows/2008/09/devicefoundation">{8C7B310D-90F8-40D4-B5EA-71D81821DEA6}</df:X_containerId>
-->
        <deviceType>urn:example-com:device:uPnPDevice:1</deviceType>
            <friendlyName>My UPNP Device Hosted by Windows</friendlyName>
            <manufacturer>Example Company</manufacturer>
            <manufacturerURL>http://www.example.com/</manufacturerURL>
            <modelDescription>My UPnP Device</modelDescription>
            <modelName>uPnPDevice</modelName>
            <modelNumber>1001</modelNumber>
            <modelURL>http://www.example.com/</modelURL>
            <serialNumber>123456</serialNumber>
            <UDN>uuid:9742f52d-f39f-4eaf-9ecf-bb742e9d79e9</UDN>
            <UPC>00000-00001</UPC>
            <serviceList>
                <service>
                    <serviceType>urn:schemas-upnp-org:service:SwitchPower:1</serviceType>
                    <serviceId>urn:upnp-org:serviceId:SwitchPower:1</serviceId>
                    <controlURL>
                        /upnphost/udhisapi.dll?control=uuid:9742f52d-f39f-4eaf-9ecf-bb742e9d79e9+urn:upnp-org:serviceId:SwitchPower:1
                    </controlURL>
                    <eventSubURL>
                        /upnphost/udhisapi.dll?event=uuid:9742f52d-f39f-4eaf-9ecf-bb742e9d79e9+urn:upnp-org:serviceId:SwitchPower:1
                    </eventSubURL>
                    <SCPDURL>
                        /upnphost/udhisapi.dll?content=uuid:40c39217-e93b-4d0a-b5e0-abc582b2a2ed
                    </SCPDURL>
                </service>
            </serviceList>
        <presentationURL>
            /uuid:9742f52d-f39f-4eaf-9ecf-bb742e9d79e9/DimmerPresentation.htm?/upnphost/udhisapi.dll?content=uuid:9742f52d-f39f-4eaf-9ecf-bb742e9d79e9+uuid:9742f52d-f39f-4eaf-9ecf-bb742e9d79e9
        </presentationURL>
    </device>
</root>

请注意，controlURL，eventSubURL和SCPDURL已更改。访问

http://localhost:2869/upnphost/udhisapi.dll?content=uuid:40c39217-e93b-4d0a-b5e0-abc582b2a2ed

将确切内容作为文件UPnPDevice_SCPD.xml返回。

2 个答案:

答案 0 :(得分：2)

SCPD文档必须添加XML declration。例如：<?xml version="1.0"?> 

<?xml version="1.0"?>
<scpd xmlns="urn:schemas-upnp-org:service-1-0">
...
</scpd>

答案 1 :(得分：1)

我已针对设备和服务XSD验证了您的XML，但它们没有问题。我建议使用外部工具Intel Device Spy检查正在运行的SwitchPower设备，以确定您的SCPD是否真的由设备提供服务。我有点怀疑SCPDURL没有加斜杠。根据DeviceArchitecture，它“必须相对于设备描述所在的URL”，因此如果它不是以斜杠开头，则可能会构造一些有趣的URL。这样你确实得到了一个服务（因为设备描述提到它）但是它无法获得任何关于它的信息，所以你可能会得到某种无效的初始化。只是一个理论。这一切都取决于我一无所知的那些IUPnP *实现。

第二个想法，SwitchPower有几个REQUIRED函数，你没有在SCPD中指定。但只要您（还）尝试以标准方式访问服务，这可能不是问题。

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