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index.ts
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index.ts
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import {
Connection,
ConnectionBackend,
Headers,
ReadyState,
Request,
RequestMethod,
Response,
ResponseOptions,
ResponseType
} from 'angular2/http';
import * as utils from 'angular2/src/http/http_utils';
import {isPresent} from 'angular2/src/facade/lang';
import {Injectable} from 'angular2/core';
import {Observable} from 'rxjs/Observable';
import 'rxjs/add/operator/map';
import * as http from 'http';
import * as url from 'url';
export class NodeConnection implements Connection {
public readyState: ReadyState;
public request: Request;
public response: Observable<Response>;
constructor(req: Request, baseResponseOptions?: ResponseOptions) {
this.request = req;
let reqInfo: any = url.parse(req.url);
reqInfo.method = RequestMethod[req.method].toUpperCase();
if (isPresent(req.headers)) {
reqInfo.headers = {};
req.headers.forEach((values, name) => reqInfo.headers[name] = values.join(','));
}
this.response = new Observable(responseObserver => {
let nodeReq = http.request(reqInfo, (res: http.IncomingMessage) => {
let body = '';
res.on('data', (chunk) => body += chunk);
let status = res.statusCode;
let headers = new Headers(res.headers);
let url = res.url;
res.on('end', () => {
let responseOptions = new ResponseOptions({body, status, headers, url});
let response = new Response(responseOptions);
if (utils.isSuccess(status)) {
responseObserver.next(response);
responseObserver.complete();
return;
}
responseObserver.error(response);
});
});
let onError = (err) => {
let responseOptions = new ResponseOptions({body: err, type: ResponseType.Error});
if (isPresent(baseResponseOptions)) {
responseOptions = baseResponseOptions.merge(responseOptions);
}
responseObserver.error(new Response(responseOptions));
};
nodeReq.on('error', onError);
nodeReq.write(req.text());
nodeReq.end();
return () => {
nodeReq.removeListener('error', onError);
nodeReq.abort();
};
});
}
}
/**
* Creates {@link NodeConnection} instances.
*
* This class provides a custom backend implementation you can pass to
* {@link Http} to use when running angular on the server.
*
* ### Example
*
* ```
* import {Http, HTTP_PROVIDERS, BaseRequestOptions} from 'angular2/http';
* import {NodeBackend} from 'angular2-http-node_backend';
* @Component({
* viewProviders: [
* HTTP_PROVIDERS,
* provide(Http, {useFactory: (backend, options) => {
* return new Http(backend, options);
* }, deps: [NodeBackend, BaseRequestOptions]})]
* })
* class MyComponent {
* constructor(http:Http) {
* http.request('people.json').subscribe(res => this.people = res.json());
* }
* }
* ```
*
**/
@Injectable()
export class NodeBackend implements ConnectionBackend {
constructor(private _baseResponseOptions: ResponseOptions) {}
public createConnection(request: Request): NodeConnection {
return new NodeConnection(request, this._baseResponseOptions);
}
}