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How to tell if middleware contains a Run()?

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0

Is there any way to tell in ASP.NET Core if any given middleware will contain a Run() call which will stop the pipeline? It seems that UseMvc() is one big one, but I am not even certain about that, I just keep reading that it needs to go at the end, I assume it is because it contains a call to Run().

Perhaps there is a way to generate a visualisation of the pipeline for all middleware currently in use, showing which one contains the Run() call?

asp.net-core asp.net-core-middleware

share|improve this question

asked Mar 27 at 2:41

NachtNacht

2,14411 gold badge1919 silver badges3434 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  1. Not only Run(), but also MapWhen() will terminate the process. Also, anyone could create a custom middleware that doesn't invoke the next delegate and then cause to a terminate. 2. It's the duty of middleware to determine whether there's a need to to call next. There's no built-in way to visualize the pipeline except you read the document/source code. That's because all the middlewares will be built into a single final delegate at startup time. When there's an incoming message, the final delegate will be used to process requests.
  
  – itminus
  Mar 27 at 5:11
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  [too long to post as a single one comment] As a programmer, we know what will be done by the middlewares, we know the time when it branches, and we know the time it terminates that's because we write the code. But the program won't know it until it actually runs just because the final delegate is built at startup time.
  
  – itminus
  Mar 27 at 5:14
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @itminus Thanks, any reason you didn't post that as an answer?
  
  – Nacht
  Mar 27 at 12:50
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Since the question is "how to tell". My reply, which only describes how the middleware works, seems not answer the question itself. So I post it as a comment.
  
  – itminus
  Mar 27 at 13:18
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  @itminus Your answer seems to be, "There is no sure way to tell, beyond reading documentation on each specific piece of middleware."
  
  – Nacht
  Mar 27 at 13:48
  
  

  
  
  
  

 | 
show 1 more comment

0

Is there any way to tell in ASP.NET Core if any given middleware will contain a Run() call which will stop the pipeline? It seems that UseMvc() is one big one, but I am not even certain about that, I just keep reading that it needs to go at the end, I assume it is because it contains a call to Run().

Perhaps there is a way to generate a visualisation of the pipeline for all middleware currently in use, showing which one contains the Run() call?

asp.net-core asp.net-core-middleware

share|improve this question

asked Mar 27 at 2:41

NachtNacht

2,14411 gold badge1919 silver badges3434 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  1. Not only Run(), but also MapWhen() will terminate the process. Also, anyone could create a custom middleware that doesn't invoke the next delegate and then cause to a terminate. 2. It's the duty of middleware to determine whether there's a need to to call next. There's no built-in way to visualize the pipeline except you read the document/source code. That's because all the middlewares will be built into a single final delegate at startup time. When there's an incoming message, the final delegate will be used to process requests.
  
  – itminus
  Mar 27 at 5:11
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  [too long to post as a single one comment] As a programmer, we know what will be done by the middlewares, we know the time when it branches, and we know the time it terminates that's because we write the code. But the program won't know it until it actually runs just because the final delegate is built at startup time.
  
  – itminus
  Mar 27 at 5:14
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @itminus Thanks, any reason you didn't post that as an answer?
  
  – Nacht
  Mar 27 at 12:50
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Since the question is "how to tell". My reply, which only describes how the middleware works, seems not answer the question itself. So I post it as a comment.
  
  – itminus
  Mar 27 at 13:18
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  @itminus Your answer seems to be, "There is no sure way to tell, beyond reading documentation on each specific piece of middleware."
  
  – Nacht
  Mar 27 at 13:48
  
  

  
  
  
  

 | 
show 1 more comment

Is there any way to tell in ASP.NET Core if any given middleware will contain a Run() call which will stop the pipeline? It seems that UseMvc() is one big one, but I am not even certain about that, I just keep reading that it needs to go at the end, I assume it is because it contains a call to Run().

Perhaps there is a way to generate a visualisation of the pipeline for all middleware currently in use, showing which one contains the Run() call?

asp.net-core asp.net-core-middleware

share|improve this question

asked Mar 27 at 2:41

NachtNacht

2,14411 gold badge1919 silver badges3434 bronze badges

share|improve this question

asked Mar 27 at 2:41

NachtNacht

2,14411 gold badge1919 silver badges3434 bronze badges

share|improve this question

asked Mar 27 at 2:41

NachtNacht

2,14411 gold badge1919 silver badges3434 bronze badges

asked Mar 27 at 2:41

NachtNacht

2,14411 gold badge1919 silver badges3434 bronze badges

asked Mar 27 at 2:41

NachtNacht

2,14411 gold badge1919 silver badges3434 bronze badges