Issues when using npm link in Aurelia #251

New Issue

fergalmoran · 2025-08-09T17:15:34Z

fergalmoran commented

2025-08-09 17:15:34 +00:00

Originally created by @jonathaneckman on 12/23/2017

Steps to reproduce

Generate a new project with dotnet new aurelia.
Clone an Aurelia plugin. I have tested this with aurelia-validation and aurelia-open-id-connect.
Do what is necessary to build the plugin, such as npm install and npm build.
In the root of the project, run npm link.
In the root of the .NET Aurelia project, run npm link aurelia-open-id-connect.
Start the app.

Result

In the browser, the app never loads. A response of 500 is returned for all site assets:

The error thrown by JavaScriptServices each time one of the assets is requested is:

System.Net.Http.HttpRequestException: An error occurred while sending the request. ---> System.Net.Http.WinHttpException: A connection with the server could not be established
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Threading.Tasks.RendezvousAwaitable`1.GetResult()
   at System.Net.Http.WinHttpHandler.<StartRequest>d__105.MoveNext()
   --- End of inner exception stack trace ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1.ConfiguredTaskAwaiter.GetResult()
   at System.Net.Http.DiagnosticsHandler.<SendAsync>d__2.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1.ConfiguredTaskAwaiter.GetResult()
   at System.Net.Http.HttpClient.<FinishSendAsyncUnbuffered>d__59.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at Microsoft.AspNetCore.SpaServices.Webpack.ConditionalProxyMiddleware.<PerformProxyRequest>d__7.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at Microsoft.AspNetCore.SpaServices.Webpack.ConditionalProxyMiddleware.<Invoke>d__6.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.AspNetCore.SpaServices.Webpack.ConditionalProxyMiddleware.<Invoke>d__6.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.<Invoke>d__7.MoveNext()

If I undo the link using the steps below, everything runs as expected.

In the root of the consuming application, run npm unlink aurelia-open-id-connect and npm install aurelia-open-id-connect.
In the root of the plugin, run npm unlink.
Run the app.

Desired Behavior

I would like to be able to test and develop local Aurelia plugins consumed by a .NET Core app running JavaScriptServices. It does not need to be using npm link if you know an alternative. If this requires a change to JavaScriptServices I am willing to submit a PR if I understand the solution.

*Originally created by @jonathaneckman on 12/23/2017* ## Steps to reproduce 1. Generate a new project with `dotnet new aurelia`. 1. Clone an Aurelia plugin. I have tested this with **aurelia-validation** and **aurelia-open-id-connect**. 1. Do what is necessary to build the plugin, such as `npm install` and `npm build`. 1. In the root of the project, run `npm link`. 1. In the root of the .NET Aurelia project, run `npm link aurelia-open-id-connect`. 1. Start the app. ## Result In the browser, the app never loads. A response of 500 is returned for all site assets: ![image](https://user-images.githubusercontent.com/11893200/34321175-ed53472a-e7d6-11e7-9943-7eb023837fe2.png) The error thrown by **JavaScriptServices** each time one of the assets is requested is: ``` System.Net.Http.HttpRequestException: An error occurred while sending the request. ---> System.Net.Http.WinHttpException: A connection with the server could not be established at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at System.Threading.Tasks.RendezvousAwaitable`1.GetResult() at System.Net.Http.WinHttpHandler.<StartRequest>d__105.MoveNext() --- End of inner exception stack trace --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1.ConfiguredTaskAwaiter.GetResult() at System.Net.Http.DiagnosticsHandler.<SendAsync>d__2.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1.ConfiguredTaskAwaiter.GetResult() at System.Net.Http.HttpClient.<FinishSendAsyncUnbuffered>d__59.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult() at Microsoft.AspNetCore.SpaServices.Webpack.ConditionalProxyMiddleware.<PerformProxyRequest>d__7.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult() at Microsoft.AspNetCore.SpaServices.Webpack.ConditionalProxyMiddleware.<Invoke>d__6.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.AspNetCore.SpaServices.Webpack.ConditionalProxyMiddleware.<Invoke>d__6.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.<Invoke>d__7.MoveNext() ``` If I undo the link using the steps below, everything runs as expected. 1. In the root of the consuming application, run `npm unlink aurelia-open-id-connect` and `npm install aurelia-open-id-connect`. 1. In the root of the plugin, run `npm unlink`. 1. Run the app. ## Desired Behavior I would like to be able to test and develop local Aurelia plugins consumed by a .NET Core app running **JavaScriptServices**. It does not need to be using `npm link` if you know an alternative. If this requires a change to **JavaScriptServices** I am willing to submit a PR if I understand the solution.

fergalmoran closed this issue

2025-08-09 17:15:34 +00:00

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Reference: github/JavaScriptServices#251