NgMiniProfiler

This package contains an Http interceptor for using MiniProfiler with Angular.

Getting started

To use it in your app, simply import the MiniProfilerModule and provide the interceptor.

import { MiniProfilerInterceptor, MiniProfilerModule } from '@cactusoft-ca/ng-miniprofiler';

@NgModule({
  [...]
  imports: [
    MiniProfilerModule.forRoot({
      baseUri: 'http://localhost:12345',
      colorScheme: 'Auto',
      maxTraces: 15,
      position: 'BottomLeft',
      toggleShortcut: 'Alt+M',
      enabled: true,
      enableGlobalMethod: true
    }),
  ],
  providers: [
    { provide: HTTP_INTERCEPTORS, useClass: MiniProfilerInterceptor, multi: true }
  ]
})
export class YourModule { }

Configurations

Ng-miniprofiler offers a couple of configurations.

Config	Description	Default
baseUri	The base uri of the server hosting your MiniProfiler results and include.min.js file. Depending on your configs, the results may be under the profiling route. The value should then be http://localhost:12345/profiling.	''
colorScheme	The theme. Either Light, Dark or Auto.	Auto
maxTraces	Maximum number of traces shown.	15
position	Where the popup should be placed. Either Left, Right, BottomLeft, BottomRight.	Left
toggleShortcut	The shortcut for toggling the popup.	Alt+M
showControls	Whether or not the controls (minimize and clear) should be shown.	false
enabled	Whether or not miniprofiler is enabled.	true
enableGlobalMethod	Whether or not an enableMiniProfiler method should be added to the window object. Can be useful in a production environment where you want MiniProfiler to be disabed by default.	true

Backend gotchas

If your server lives on a different domain from your Angular app, you may run into two CORS issues.

Firstly, you need to allow your app to request MiniProfiler results. For an ASP.NET Web API solution, that's one way of doing so (in the global.asax.cs file).

protected void Application_BeginRequest()
{
    var context = HttpContext.Current;
    if (HttpContext.Current.Request.Path.StartsWith("/mini-profiler-resources"))
    {
        var origin = context.Request.Headers.Get("Origin");
        if (origin != null)
        {
            context.Response.Headers.Add("Access-Control-Allow-Origin", origin);
        }
        if (context.Request.HttpMethod == "OPTIONS")
        {
            context.Response.StatusCode = 200;
            context.Response.Headers.Add("Access-Control-Allow-Headers", "Content-Type");
            context.Response.Headers.Add("Access-Control-Allow-Methods", "OPTIONS, GET");
        }
    }
}

Secondly, your server needs to let your Angular app access the X-MiniProfiler-Ids headers. You may do that by adding an ActionFilter.

public class MiniProfilerCorsHeaderFilter : ActionFilterAttribute
{
    public override void OnActionExecuted(HttpActionExecutedContext actionExecutedContext)
    {
        actionExecutedContext.Response.Headers.Add("Access-Control-Expose-Headers", "X-MiniProfiler-Ids");
    }
}

Enable mini-profiler manually

If you set the enableGlobalMethod configuration to true, you may call the enableMiniProfiler from your browser's devtools console to enable MiniProfiler manually.

> enableMiniProfiler();
>
> MiniProfiler loaded.

To publish npm package

• The version in the package.json in the project folder must be incremented

• On github, in Settings -> Developer settings -> Personal Access Tokens. Generate a new token with the privileges to write:packages.

• Run command with your username, token and email.

npm login --scope=@cactusoft-ca --registry=https://npm.pkg.github.com

In the ./projects/ng-miniprofiler folder, run

npm run build:prod

Finally, run from the ./dist/ng-miniprofiler folder

npm publish