How to create an Http instance without using constructor DI?

Question

For some reason, I don't want to use constructor(private http: Http) DI.

Looked at https://angular.io/docs/ts/latest/api/http/index/Http-class.html

and tried

const injector = ReflectiveInjector.resolveAndCreate([
  BaseRequestOptions,
  XHRConnection,
  {
    provide: Http,
    useFactory: (backend, defaultOptions) => new Http(backend, defaultOptions),
    deps: [XHRConnection, BaseRequestOptions]
  }
]);

this.http = injector.get(Http);

Error says

ORIGINAL EXCEPTION: Cannot resolve all parameters for 'XHRConnection'(?, ?, ?). Make sure that all the parameters are decorated with Inject or have valid type annotations and that 'XHRConnection' is decorated with Injectable.

Günter Zöchbauer · Accepted Answer · 2016-08-29 15:22:43Z

1

You need to provide HTTP_PROVIDERS:

const injector = ReflectiveInjector.resolveAndCreate([
  HTTP_PROVIDERS,
  XHRConnection,
  {
    provide: Http,
    useFactory: (backend, defaultOptions) => new Http(backend, defaultOptions),
    deps: [XHRConnection, BaseRequestOptions]
  }
]);

answered Aug 29, 2016 at 15:22

Günter Zöchbauer

662k235 gold badges2.1k silver badges1.6k bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Lucio Mollinedo Over a year ago

HTTP_PROVIDERS is now deprecated. Do you have an example for RC.5+?

Shawn · Accepted Answer · 2016-08-29 18:45:56Z

0

Actually, it can be as simple as

const injector = ReflectiveInjector.resolveAndCreate([
  HTTP_PROVIDERS
]);

this.http = injector.get(Http);

Based on Günter Zöchbauer's answer.

answered Aug 29, 2016 at 18:45

Shawn

34.5k17 gold badges49 silver badges75 bronze badges

1 Comment

Lucio Mollinedo Over a year ago

HTTP_PROVIDERS is now deprecated. Do you have an example for RC.5+?

Collectives™ on Stack Overflow

How to create an Http instance without using constructor DI?

2 Answers 2

1 Comment

1 Comment

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

1 Comment

1 Comment

Your Answer

Sign up or log in

Post as a guest

Linked

Related