René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Http requests should be lazy / cold Observables","articleBody":"As Http is Observable powered, it makes more semantic sense for requests to be \"lazy\", that is, nothing should happen until .subscribe is called somewhere downrange. \n\nCurrently, calling `http.get(url)` will immediately fire off an XHR, irrespective of whether or not the request has been subscribed to. This is probably a side-effect of the EventEmitter using a Subject (and thus could be resolved when RxNext goes in) - generally we should opt for Observables for such things and only use Subjects when necessary. \n\nSee http://plnkr.co/edit/ncg5Kx?p=preview for a reproduction / naive semantically better implementation. \n\nSuggested fix would be having backends etc initialize and return an Observable that could be .mapped to the Response\n","author":{"url":"https://github.com/robwormald","@type":"Person","name":"robwormald"},"datePublished":"2015-09-08T07:21:22.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":3},"url":"https://github.com/4043/angular/issues/4043"}