1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
|
import { Injectable } from '@angular/core';
import { Http, Headers, RequestOptionsArgs, Response } from '@angular/http';
import { Location } from '@angular/common';
import { Observable } from 'rxjs/Observable';
import { Subject } from 'rxjs/Subject';
import { BehaviorSubject } from 'rxjs/BehaviorSubject';
import * as io from 'socket.io-client';
import { AlertService } from './alert.service';
// Import RxJs required methods
import 'rxjs/add/operator/map';
import 'rxjs/add/operator/catch';
import 'rxjs/add/observable/throw';
export interface IXDSVersion {
version: string;
apiVersion: string;
gitTag: string;
}
export interface IAgentStatus {
baseURL: string;
connected: boolean;
WS_connected: boolean;
connectionRetry: number;
version: string;
}
// Default settings
const DEFAULT_PORT = 8010;
const DEFAULT_API_KEY = "1234abcezam";
const API_VERSION = "v1";
@Injectable()
export class XDSAgentService {
public Status$: Observable<IAgentStatus>;
private baseRestUrl: string;
private wsUrl: string;
private connectionMaxRetry: number;
private apikey: string;
private _status: IAgentStatus = {
baseURL: "",
connected: false,
WS_connected: false,
connectionRetry: 0,
version: "",
};
private statusSubject = <BehaviorSubject<IAgentStatus>>new BehaviorSubject(this._status);
private socket: SocketIOClient.Socket;
constructor(private http: Http, private _window: Window, private alert: AlertService) {
this.Status$ = this.statusSubject.asObservable();
this.apikey = DEFAULT_API_KEY; // FIXME Add dynamic allocated key
this._initURLs('http://localhost:' + DEFAULT_PORT);
}
connect(retry: number, url?: string): Observable<IAgentStatus> {
if (url) {
this._initURLs(url);
}
//FIXME [XDS-Agent]: not implemented yet, set always as connected
//this._status.connected = false;
this._status.connected = true;
this._status.connectionRetry = 0;
this.connectionMaxRetry = retry || 3600; // 1 hour
// Init IO Socket connection
this._handleIoSocket();
// Get Version in order to check connection via a REST request
return this.getVersion()
.map((v) => {
this._status.version = v.version;
this.statusSubject.next(Object.assign({}, this._status));
return this._status;
});
}
public getVersion(): Observable<IXDSVersion> {
/*FIXME [XDS-Agent]: Not implemented for now
return this._get('/version');
*/
return Observable.of({
version: "NOT_IMPLEMENTED",
apiVersion: "NOT_IMPLEMENTED",
gitTag: "NOT_IMPLEMENTED"
});
}
private _initURLs(url: string) {
this._status.baseURL = url;
this.baseRestUrl = this._status.baseURL + '/api/' + API_VERSION;
let re = this._status.baseURL.match(/http[s]?:\/\/([^\/]*)[\/]?/);
if (re === null || re.length < 2) {
this.wsUrl = '';
console.error('ERROR: cannot determine Websocket url');
return;
}
this.wsUrl = 'ws://' + re[1];
}
private _WSState(sts: boolean) {
this._status.WS_connected = sts;
this.statusSubject.next(Object.assign({}, this._status));
}
private _handleIoSocket() {
this.socket = io(this.wsUrl, { transports: ['websocket'] });
this.socket.on('connect_error', (res) => {
this._WSState(false);
console.error('WS Connect_error ', res);
});
this.socket.on('connect', (res) => {
this._WSState(true);
});
this.socket.on('disconnection', (res) => {
this._WSState(false);
this.alert.error('WS disconnection: ' + res);
});
this.socket.on('error', (err) => {
console.error('WS error:', err);
});
}
private _attachAuthHeaders(options?: any) {
options = options || {};
let headers = options.headers || new Headers();
// headers.append('Authorization', 'Basic ' + btoa('username:password'));
headers.append('Access-Control-Allow-Origin', '*');
headers.append('Accept', 'application/json');
headers.append('Content-Type', 'application/json');
if (this.apikey !== "") {
headers.append('X-API-Key', this.apikey);
}
options.headers = headers;
return options;
}
private _checkAlive(): Observable<boolean> {
if (this._status.connected) {
return Observable.of(true);
}
return this.http.get(this._status.baseURL, this._attachAuthHeaders())
.map((r) => this._status.connected = true)
.retryWhen((attempts) => {
this._status.connectionRetry = 0;
return attempts.flatMap(error => {
this._status.connected = false;
if (++this._status.connectionRetry >= this.connectionMaxRetry) {
return Observable.throw("XDS local Agent not responding (url=" + this._status.baseURL + ")");
} else {
return Observable.timer(1000);
}
});
});
}
private _get(url: string): Observable<any> {
return this._checkAlive()
.flatMap(() => this.http.get(this.baseRestUrl + url, this._attachAuthHeaders()))
.map((res: Response) => res.json())
.catch(this._decodeError);
}
private _post(url: string, body: any): Observable<any> {
return this._checkAlive()
.flatMap(() => this.http.post(this.baseRestUrl + url, JSON.stringify(body), this._attachAuthHeaders()))
.map((res: Response) => res.json())
.catch((error) => {
return this._decodeError(error);
});
}
private _delete(url: string): Observable<any> {
return this._checkAlive()
.flatMap(() => this.http.delete(this.baseRestUrl + url, this._attachAuthHeaders()))
.map((res: Response) => res.json())
.catch(this._decodeError);
}
private _decodeError(err: Response | any) {
let e: string;
if (this._status) {
this._status.connected = false;
}
if (typeof err === "object") {
if (err.statusText) {
e = err.statusText;
} else if (err.error) {
e = String(err.error);
} else {
e = JSON.stringify(err);
}
} else if (err instanceof Response) {
const body = err.json() || 'Server error';
const error = body.error || JSON.stringify(body);
e = `${err.status} - ${err.statusText || ''} ${error}`;
} else {
e = err.message ? err.message : err.toString();
}
return Observable.throw(e);
}
}
|
