从 C# 读取 WCF MSMQ 消息

Question

我使用 WCF 客户端向 WCF Service 发送 msmq 消息，在 WCF Service 处理 msmq 消息之前，我想检查消息的正文。
检查 msmq 消息正文的内容后，我得到以下结果。

但是，我没能得到确切的字符串。
下面是WCF服务的定义

    [ServiceContract]
public interface IMSMQService
{

    [OperationContract(IsOneWay = true)]       

    void ShowMessage(string msg);
}

我使用下面的方法来检索消息体，它输出为空，如果我在ms上添加watch，我可以得到

"\0\u0001\0\u0001\u0004\u0002(net.msmq://vdi-v-tazho/private/TestQueue\u0003\aV\u0002\v\u0001s\u0004\v\u0001a\u0006V \bD\n\u001e\0��+http://tempuri.org/IMSMQService/ShowMessage@\u0017VsDebuggerCausalityData\bAhttp://schemas.microsoft.com/vstudio/diagnostics/servicemodelsink�

                //message.Formatter = new XmlMessageFormatter(new String[] { });
            //StreamReader sr = new StreamReader(message.BodyStream);
            string ms = "";
            //while (sr.Peek() >= 0)
            //{
            //    ms += sr.ReadLine();
            //}
            message.Formatter = new ActiveXMessageFormatter();
            string result = System.Text.Encoding.UTF8.GetString(message.Body as byte[]);
            StreamReader reader = new StreamReader(message.BodyStream);

            ms = reader.ReadToEnd();
            MessageBox.Show(ms);

Answer 1

我得到了下面的代码来实现我的要求。

private void MSMQStringBody_Click(object sender, EventArgs e)
{
    System.Messaging.MessageQueue[] queueList = System.Messaging.MessageQueue.GetPrivateQueuesByMachine(Environment.MachineName);
    MessageQueue myQueue = queueList[1];
    List<System.Messaging.Message> messages = myQueue.GetAllMessages().ToList();
    foreach (System.Messaging.Message message in messages)
    {
        System.Xml.XmlDocument result = ConvertToXMLDoc(message);
        MessageBox.Show(result.InnerText);
    }

}
public System.Xml.XmlDocument ConvertToXMLDoc(System.Messaging.Message msg)
{
    byte[] buffer = new byte[msg.BodyStream.Length];
    msg.BodyStream.Read(buffer, 0, (int)msg.BodyStream.Length);
    int envelopeStart = FindEnvolopeStart(buffer);
    System.IO.MemoryStream stream = new System.IO.MemoryStream(buffer, envelopeStart, buffer.Length - envelopeStart);
    System.ServiceModel.Channels.BinaryMessageEncodingBindingElement elm = new System.ServiceModel.Channels.BinaryMessageEncodingBindingElement();
    System.ServiceModel.Channels.Message msg1 = elm.CreateMessageEncoderFactory().Encoder.ReadMessage(stream, Int32.MaxValue);
    System.Xml.XmlDocument doc = new System.Xml.XmlDocument();
    doc.Load(msg1.GetReaderAtBodyContents());
    msg.BodyStream.Position = 0;
    return doc;
}
private int FindEnvolopeStart(byte[] stream)
{
    int i = 0;
    byte prevByte = stream[i];
    byte curByte = (byte)0;
    for (i = 0; i < stream.Length; i++)
    {
        curByte = stream[i];
        if (curByte == (byte)0x02 &&
        prevByte == (byte)0x56)
            break;
        prevByte = curByte;
    }
    return i - 1;
}

Answer 2

当您向/从 MSMQ 发送/检索消息正文时，您应该使用相同的“类型”。请参阅下面的通用类型“T”。 T 可以是您的任何自定义类。

    public T GetQueueMessage()
    {
        Message message = queue.Receive(new TimeSpan(0, 0, 0, 1, 0));
        return (T)message.Body;
    }

    public void InsertQueueMessage(T message)
    {
        using (Message msg = new Message((object)message))
        {
            queue.Send(msg, MessageQueueTransactionType.Single);
        }
    }

Answer 3

我知道问题是 C# 代码，但我在这里为我们这些喜欢使用 shell 快速检查 MSMQ 内容的人提供了 Powershell 脚本。使用 Edward 的代码，我还使用 Powershell 进行了这项工作，如果有人正在寻找可以提取这些 WCF 消息的脚本，这些消息作为有效负载发送到 WCF 服务，端点使用协议绑定 NetMsmqbinding 或 NetMsmqIntegrationBinding。

我没有使用 Int32.MaxValue，而是使用了另一个我知道在大多数情况下就足够的大整数值。顺便说一下，如果知道找到 Soap Envelope 背后的逻辑，那就太好了。

这是 Powershell 脚本：

[System.Reflection.Assembly]::LoadWithPartialName("System.Messaging") | Out-Null
[System.Reflection.Assembly]::LoadWithPartialName("System.Xml") | Out-Null
[System.Reflection.Assembly]::LoadWithPartialName("System.ServiceModel") | Out-Null
[System.Reflection.Assembly]::LoadWithPartialName("System.IO") | Out-Null


$queuePath = ".\private$\demoqueue4"

Write-Host "Powershell MSMQ queue WCF inspector v0.1. Inspecting queue contents of the queue: $queuePath"
Write-Host ""


Run-MainDemoIterateMsmq $queuePath



Function Get-XmlFromWcfMessage([System.Messaging.Message] $msg) {

    $doc = New-Object System.Xml.XmlDocument;
    $messageLength = [int] $msg.BodyStream.Length


    $buffer = New-Object byte[] $messageLength


    $msg.BodyStream.Read($buffer, 0, $messageLength)

    $envelopeStart = Find-SoapEnvelopeStart($buffer)

    $envelopeStart = $envelopeStart - 0

    $envelopeLength = $($buffer.Length - $envelopeStart)
    #Write-Host $envelopeStart


    $stream = New-Object System.IO.MemoryStream($buffer, $envelopeStart, $envelopeLength)

    $elm = New-Object System.ServiceModel.Channels.BinaryMessageEncodingBindingElement
    $elm.ReaderQuotas.MaxStringContentLength = 10000000
    $elm.ReaderQuotas.MaxBytesPerRead = 10000000


    $msg1 = $elm.CreateMessageEncoderFactory().Encoder.ReadMessage($stream, 10000000);

    $doc.Load($msg1.GetReaderAtBodyContents());

    $msg.BodyStream.Position = 0;



    return $doc;
}

Function Find-SoapEnvelopeStart([byte[]] $stream)
{
    $i = 0;
    $j = 0;
    $prevByte = $stream[$i];
    $curByte = [byte]$j;
    for ($i = 0; $i -lt $stream.Length; $i++)
    {
        $curByte = $stream[$i];
        if ($curByte -eq [byte] 0x02 -and $prevByte -eq [byte] 0x56) {
            break;
        }
        $prevByte = $curByte;
    }
    return $i - 1;
}


Function Run-MainDemoIterateMsmq([string] $queuePath) {

$queue = New-Object System.Messaging.MessageQueue $queuePath

foreach ($message in $queue.GetAllMessages()){
  $xmlDoc = Get-XmlFromWcfMessage $message 
  Write-Host $xmlDoc.OuterXml
 } 


}

然后输出可能如下所示：

    <SendMessage xmlns="http://tempuri.org/"><message>this is another test!</message></SendMessage>
    <SendMessage xmlns="http://tempuri.org/"><message>why hello srmp</message></SendMessage>
    <SendMessage xmlns="http://tempuri.org/"><message>test</message></SendMessage>
    <SendMessage xmlns="http://tempuri.org/"><message>my message to msmq</message></SendMessage>
    <SendMessage xmlns="http://tempuri.org/"><message>This is a new message!</message></SendMessage>
    <SendMessage xmlns="http://tempuri.org/"><message>Another message to MSMQ! </message></SendMessage>
    <SendMessage xmlns="http://tempuri.org/"><message>another test here</message></SendMessage>
    <SendMessage xmlns="http://tempuri.org/"><message>This is a test message that will be sent using NetMsmqBinding. </message></SendMessage>
    <SendMessageDataContract xmlns="http://tempuri.org/"><message xmlns:b="http://schemas.datacontract.org/2004/07/WcfDemoNetMsmqBinding.Host" xmlns:i="http://www.w3.org/2001
    /XMLSchema-instance"><b:BoolValue>true</b:BoolValue><b:StringValue>This is a test of a stringvalue for a CompositeType</b:StringValue></message></SendMessageDataContract>