Implement a "suspend based on content" component

[riha]

Could be something like the below.

The idea is to have a comp that could for example examine the content in a message and if a specific value exist, suspend it. Maybe could support regex?

A typical scenario is a web service that respond with 200 OK but has an error in the message.

public IBaseMessage Execute(IPipelineContext pContext, IBaseMessage pInMsg)
        {
           
            String value = null;
            bool suspend = false;

            IBaseMessagePart bodyPart = pInMsg.BodyPart;

           

            Stream inboundStream = bodyPart.GetOriginalDataStream();
            VirtualStream virtualStream = new VirtualStream(VirtualStream.MemoryFlag.AutoOverFlowToDisk);
            ReadOnlySeekableStream readOnlySeekableStream = new ReadOnlySeekableStream(inboundStream, virtualStream);

            XmlTextReader xmlTextReader = new XmlTextReader(readOnlySeekableStream);
            XPathCollection xPathCollection = new XPathCollection();
            XPathReader xPathReader = new XPathReader(xmlTextReader, xPathCollection);
            xPathCollection.Add(XPath);

            while (xPathReader.ReadUntilMatch())
            {
                if (xPathReader.Match(0))
                {
                    if (xPathReader.NodeType == XmlNodeType.Attribute)
                    {
                        value = xPathReader.GetAttribute(xPathReader.Name);
                    }
                    else
                    {
                        value = xPathReader.ReadString();
                    }
 
                    break;
                }
            }

           
            suspend = ScriptExpressionHelper.ValidateExpression(value, Expression);

            if (suspend)
            {
              readOnlySeekableStream.Position = 0;
                pContext.ResourceTracker.AddResource(readOnlySeekableStream);
                bodyPart.Data = readOnlySeekableStream;
                pInMsg.Context.Write("SuspendAsNonResumable", "http://schemas.microsoft.com/BizTalk/2003/system-properties", true);
                pInMsg.Context.Write("SuppressRoutingFailureDiagnosticInfo", "http://schemas.microsoft.com/BizTalk/2003/system-properties", true);

                throw new Exception(String.Format("Expression {0} {1} did not evaluate to true", value, Expression));
            }
            else
            {
                pInMsg = null;
            }

[robinhultman]

Perhaps there can be one version that suspends the message on error and one that just translates the http status code to a more suitable one to use in request response scenarios with http on both ends?

[riha]

Yes. Agree. mån 5 dec. 2016 kl. 22:13 skrev Robin Hultman <notifications@github.com>:

…

Perhaps there can be one version that suspends the message on error and one that just translates the http status code to a more suitable one to use in request response scenarios with http on both ends? — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#5 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/ABQbZugeDNIj0IQuNzBvIprUjK9vSFqAks5rFH5hgaJpZM4LEAgG> .

[robinhultman]

I'm thinking something like "ValidateRule" or "ValidateCustom" to separate it from standard validation i.e xsd validation. I think the name should leave some room to different validation mechanisms (regex to start with) and error behavior, like suspend on error or set statuscode on error.
Any thoughts?

[riha]

Sounds good. So what we are looking at are a number of different components then? Maybe packed together similar to how ManageMessageNamespace is?
What components could we start with then? ValidateWithSuspend and ValidateWithStatusCode?

[robinhultman]

Started development in https://github.com/BizTalkComponents/ValidateCustom/tree/feature-implement/
Could you provide an implementation of the RegexValidator?