postActivity responses to an Invoke return the string 'retry'

If you send an InvokeActivity to postActivity via dljs, a success will return an id with the activity ID. However, an Invoke can return other status codes for error/failure cases. When this happens, postActivity still calls the "success" trigger but with an id of 'retry'.

Repro code:

directLine.postActivity({
type: 'invoke',
name: 'good'
}).subscribe(
id => {
console.log("Posted activity, assigned ID ", id); // this is called with a real id
},
error => {
console.log("Error posting activity", error);
}
);

directLine.postActivity({
type: 'invoke',
name: 'bad'
}).subscribe(
id => {
console.log("Posted activity, assigned ID ", id); // this is called with an id of 'retry'
},
error => {
console.log("Error posting activity", error);
}
);

For the boy, just handle invokes and return an InvokeResponse of 409 or whatnot in that bad case, and an InvokeResponse of 200 in the good case:

Here is some C# code to do this:

protected override async Task OnInvokeActivityAsync(ITurnContext turnContext, CancellationToken cancellationToken)
{
await turnContext.SendActivityAsync("Got an invoke: " + turnContext.Activity.Name);
if (turnContext.Activity.Name == "good")
{
await turnContext.SendActivityAsync(
new Activity
{
Type = ActivityTypesEx.InvokeResponse,
Value = new InvokeResponse
{
Status = 200
},
}, cancellationToken).ConfigureAwait(false);
}
else if (turnContext.Activity.Name == "bad")
{
await turnContext.SendActivityAsync(
new Activity
{
Type = ActivityTypesEx.InvokeResponse,
Value = new InvokeResponse
{
Status = 409
},
}, cancellationToken).ConfigureAwait(false);
}
else
{
await base.OnInvokeActivityAsync(turnContext, cancellationToken);
}
}

Expected behavior:

(1) At least the error case should be called.
(2) It'd be nice to get the actual result code, or the 502 saying message wasn't processed properly by the bot if that's all DirectLine returns

从 postActivity 入口点开始，跟踪 Invoke 响应如何映射到 observable 的成功和错误路径。重现 issue 中 Invoke 成功和失败的情况，然后验证非成功状态响应不再将字面量 'retry' 作为成功的 activity ID 发出。