typescript-inversify.HttpClient.mustache Maven / Gradle / Ivy
import IHttpClient from "./IHttpClient";
import { Observable } from "rxjs/Observable";
import "whatwg-fetch";
import HttpResponse from "./HttpResponse";
import {injectable} from "inversify";
import "rxjs/add/observable/fromPromise";
import { Headers } from "./Headers";
@injectable()
class HttpClient implements IHttpClient {
get(url:string, headers?: Headers):Observable {
return this.performNetworkCall(url, "get", undefined, headers);
}
post(url: string, body: {}|FormData, headers?: Headers): Observable {
return this.performNetworkCall(url, "post", this.getJsonBody(body), this.addJsonHeaders(headers));
}
put(url: string, body: {}, headers?: Headers): Observable {
return this.performNetworkCall(url, "put", this.getJsonBody(body), this.addJsonHeaders(headers));
}
delete(url: string, headers?: Headers): Observable {
return this.performNetworkCall(url, "delete", undefined, headers);
}
private getJsonBody(body: {}|FormData) {
return !(body instanceof FormData) ? JSON.stringify(body) : body;
}
private addJsonHeaders(headers: Headers) {
return Object.assign({}, {
"Accept": "application/json",
"Content-Type": "application/json"
}, headers);
};
private performNetworkCall(url: string, method: string, body?: any, headers?: Headers): Observable {
let promise = window.fetch(url, {
method: method,
body: body,
headers: headers
}).then(response => {
let headers: Headers = {};
response.headers.forEach((value, name) => {
headers[name.toString().toLowerCase()] = value;
});
return response.text().then(text => {
let contentType = headers["content-type"] || "";
let payload = contentType.match("application/json") ? JSON.parse(text) : text;
let httpResponse = new HttpResponse(payload, response.status, headers);
if (response.status >= 400)
throw httpResponse;
return httpResponse;
});
});
return Observable.fromPromise(promise);
}
}
export default HttpClient