René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"feat(http): implement streaming upload/download","articleBody":"A user should be able to provide observers as part of a `Request` or `RequestOptions` object in order to receive progress updates and chunks of data for uploading and downloading of data. \n\nDownload observers will receive `Responses`, while upload observers will receive some form of [Progress Event](https://developer.mozilla.org/en-US/docs/Web/API/ProgressEvent)\n\nTo support different semantics of subscriptions between RxJS Observables and Dart Streams, an `Observer` implementation should be provided which will translate nicely to both platforms.\n\n``` typescript\nvar myObserver = new Observer(res =\u003e this.progress = res.bytesLoaded / res.totalBytes);\nhttp.request('https://foo', {\n  downloadObserver: myObserver,\n  uploadObserver: null\n}).subscribe(res =\u003e this.finalResponse = res.json());\n```\n\nThe Response Observable returned from `Http` should still emit a single `Response` value and complete when the connection closes.\n\nIn order to perform the request without requiring a subscription on the `Response Observable` this feature would also require providing a means of specifying that the request should be executed immediately. This should be an additional property of `Request` and `RequestOptions`, name TBD.\n\nThese observers can be tested with the `MockBackend`, using methods called `mockUpload` and `mockDownload`.\n","author":{"url":"https://github.com/jeffbcross","@type":"Person","name":"jeffbcross"},"datePublished":"2015-06-30T22:35:27.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":5},"url":"https://github.com/2795/angular/issues/2795"}