Я предлагаю вам обернуть сервис Http в вашей собственной службе, которая определяет ваш REST конечные точки, как это:
import { Injectable, } from '@angular/core';
import { Observable } from 'rxjs/Observable';
import 'rxjs/add/operator/toPromise';
import 'rxjs/add/operator/map';
import 'rxjs/add/operator/catch';
import { Headers, Http, Response, RequestOptionsArgs } from '@angular/http';
@Injectable()
export class RestService {
constructor(private http: Http) {}
get<T>(url: string): Observable<T> {
var options = {} as RequestOptionsArgs;
options.headers = this.prepareRequestHeaders();
return this.http.get(url, options)
.map(this.extractData)
.catch(this.handleError);
}
post<T>(url: string, data: any): Observable<T> {
var options = {} as RequestOptionsArgs;
options.headers = this.prepareRequestHeaders();
return this.http.post(url, data, options)
.map(this.extractData)
.catch(this.handleError);
}
put<T>(url: string, data: any): Observable<T> {
var options = {} as RequestOptionsArgs;
options.headers = this.prepareRequestHeaders();
return this.http.put(url, data, options)
.map(this.extractData)
.catch(this.handleError);
}
patch<T>(url: string, data: any): Observable<T> {
var options = {} as RequestOptionsArgs;
options.headers = this.prepareRequestHeaders();
return this.http.patch(url, data, options)
.map(this.extractData)
.catch(this.handleError);
}
delete<T>(url: string): Observable<T> {
var options = {} as RequestOptionsArgs;
options.headers = this.prepareRequestHeaders();
return this.http.delete(url, options)
.map(this.extractData)
.catch(this.handleError);
}
private extractData<T>(response: Response) {
var resp: T;
try {
resp = response.json() as T;
} catch (error) {
}
return resp;
}
private prepareRequestHeaders() {
var headers = new Headers();
headers.append('x-my-custom-header', 'some value');
headers.append('Content-Type', 'application/json');
// etc
return headers;
}
private handleResponse<T>(response: any): T[] {
var resp: T[];
try {
resp = response.json().data as T[];
} catch (error) {
}
return resp;
}
private handleError(error: any): Promise<any> {
return Promise.reject(error.message || error);
}
}
или если вы предпочитают обещать:
import { Injectable, } from '@angular/core';
import 'rxjs/add/operator/toPromise';
import 'rxjs/add/operator/map';
import 'rxjs/add/operator/catch';
import { Headers, Http, Response, RequestOptionsArgs } from '@angular/http';
@Injectable()
export class RestService {
constructor(private http: Http) {}
get<T>(url: string): Promise<T> {
var options = {} as RequestOptionsArgs;
options.headers = this.prepareRequestHeaders();
return this.http.get(url, options)
.map(this.extractData)
.catch(this.handleError).toPromise();
}
post<T>(url: string, data: any):Promise<T> {
var options = {} as RequestOptionsArgs;
options.headers = this.prepareRequestHeaders();
return this.http.post(url, data, options)
.map(this.extractData)
.catch(this.handleError).toPromise();
}
put<T>(url: string, data: any):Promise<T> {
var options = {} as RequestOptionsArgs;
options.headers = this.prepareRequestHeaders();
return this.http.put(url, data, options)
.map(this.extractData)
.catch(this.handleError).toPromise();
}
patch<T>(url: string, data: any):Promise<T> {
var options = {} as RequestOptionsArgs;
options.headers = this.prepareRequestHeaders();
return this.http.patch(url, data, options)
.map(this.extractData)
.catch(this.handleError).toPromise();
}
delete<T>(url: string):Promise<T> {
var options = {} as RequestOptionsArgs;
options.headers = this.prepareRequestHeaders();
return this.http.delete(url, options)
.map(this.extractData)
.catch(this.handleError).toPromise();
}
private extractData<T>(response: Response) {
var resp: T;
try {
resp = response.json() as T;
} catch (error) {
}
return resp;
}
private prepareRequestHeaders() {
var headers = new Headers();
headers.append('x-my-custom-header', 'some value');
headers.append('Content-Type', 'application/json');
// etc
return headers;
}
private handleResponse<T>(response: any): T[] {
var resp: T[];
try {
resp = response.json().data as T[];
} catch (error) {
}
return resp;
}
private handleError(error: any): Promise<any> {
return Promise.reject(error.message || error);
}
}