how to set http request header when using SQSClient

[mumutu66]

the use case is to send header "X-Amzn-Trace-Id" which contains opentelemetry trace context, but found no where to add custom header on the inner http request ... any idea?

[ashishdhingra]

@mumutu66 I suspect there is no way to add custom HTTP headers to the request object. Instead of having to manually add trace Id to header, have you tried example at https://docs.aws.amazon.com/xray/latest/devguide/xray-sdk-dotnet-sdkclients.html?

Thanks,
Ashish

[mumutu66]

@ashishdhingra Thanks for replying , I finally figure out the way to add custom http headers in two way one by the event sqsClient.BeforeRequestEvent or extend the SqsClient add a method to modify the RuntimePipeline via RuntimePipeline.ReplaceHandler<HttpHandler<HttpContent>>(item); with another extended HttpHandler which will do some custom thing during CreateWebRequest, and I followed your advice to use x-ray for instrument, trace header can add to the http request;

x-ray seems only support framework above 4.5 and research the opentelemetry-java-instrumention lib finally got a way only depends on sqs lib , so I edit the reply to record the manul way to transfer the tracercontext, and it's quite easy.

//first init your client
var sqsClient = new AmazonSQSClient

//define an event handler 
public static void xp_BeforeRequestEvent(object sender, RequestEventArgs e)
{
    WebServiceRequestEventArgs args = (WebServiceRequestEventArgs)e;
    var httpParrams = args.Parameters;
    //insert a attribute request to let sqs service return AWSTraceHeader
    httpParrams.Add("AttributeName.1", "AWSTraceHeader")
   //add trace header if not present
    args.Headers.Add("X-Amzn-Trace-Id","Root=1-a730fa61-06d807a391a9bf5b9b1a0b90;Parent=34523bfc912955fa;Sampled=1");
}

//append event
sqsClient.BeforeRequestEvent += xp_BeforeRequestEvent;

//receive the message
var receiveRequest = new ReceiveMessageRequest(xxxx);
var recevResult = sqsClient.ReceiveMessageAsync(receiveRequest);
//this is what we want
var tracecontext = recevTest.Result.Messages[0].Attributes["AWSTraceHeader"];

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