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
|
import { google, docs_v1, slides_v1 } from "googleapis";
import { createInterface } from "readline";
import { readFile, writeFile } from "fs";
import { OAuth2Client } from "google-auth-library";
import { Opt } from "../../../new_fields/Doc";
import { GlobalOptions } from "googleapis-common";
import { GaxiosResponse } from "gaxios";
/**
* Server side authentication for Google Api queries.
*/
export namespace GoogleApiServerUtils {
// If modifying these scopes, delete token.json.
const prefix = 'https://www.googleapis.com/auth/';
const SCOPES = [
'documents.readonly',
'documents',
'presentations',
'presentations.readonly',
'drive',
'drive.file',
];
export const parseBuffer = (data: Buffer) => JSON.parse(data.toString());
export enum Sector {
Documents = "Documents",
Slides = "Slides"
}
export interface CredentialPaths {
credentials: string;
token: string;
}
export type ApiResponse = Promise<GaxiosResponse>;
export type ApiRouter = (endpoint: Endpoint, paramters: any) => ApiResponse;
export type ApiHandler = (parameters: any) => ApiResponse;
export type Action = "create" | "retrieve" | "update";
export type Endpoint = { get: ApiHandler, create: ApiHandler, batchUpdate: ApiHandler };
export type EndpointParameters = GlobalOptions & { version: "v1" };
export const GetEndpoint = async (sector: string, paths: CredentialPaths) => {
return new Promise<Opt<Endpoint>>((resolve, reject) => {
readFile(paths.credentials, (err, credentials) => {
if (err) {
reject(err);
return console.log('Error loading client secret file:', err);
}
return authorize(parseBuffer(credentials), paths.token).then(auth => {
let routed: Opt<Endpoint>;
let parameters: EndpointParameters = { auth, version: "v1" };
switch (sector) {
case Sector.Documents:
routed = google.docs(parameters).documents;
break;
case Sector.Slides:
routed = google.slides(parameters).presentations;
break;
}
resolve(routed);
});
});
});
};
/**
* Create an OAuth2 client with the given credentials, and returns the promise resolving to the authenticated client
* @param {Object} credentials The authorization client credentials.
*/
export function authorize(credentials: any, token_path: string): Promise<OAuth2Client> {
const { client_secret, client_id, redirect_uris } = credentials.installed;
const oAuth2Client = new google.auth.OAuth2(
client_id, client_secret, redirect_uris[0]);
return new Promise<OAuth2Client>((resolve, reject) => {
readFile(token_path, (err, token) => {
// Check if we have previously stored a token.
if (err) {
return getNewToken(oAuth2Client, token_path).then(resolve, reject);
}
oAuth2Client.setCredentials(parseBuffer(token));
resolve(oAuth2Client);
});
});
}
/**
* Get and store new token after prompting for user authorization, and then
* execute the given callback with the authorized OAuth2 client.
* @param {google.auth.OAuth2} oAuth2Client The OAuth2 client to get token for.
* @param {getEventsCallback} callback The callback for the authorized client.
*/
function getNewToken(oAuth2Client: OAuth2Client, token_path: string) {
return new Promise<OAuth2Client>((resolve, reject) => {
const authUrl = oAuth2Client.generateAuthUrl({
access_type: 'offline',
scope: SCOPES.map(relative => prefix + relative),
});
console.log('Authorize this app by visiting this url:', authUrl);
const rl = createInterface({
input: process.stdin,
output: process.stdout,
});
rl.question('Enter the code from that page here: ', (code) => {
rl.close();
oAuth2Client.getToken(code, (err, token) => {
if (err || !token) {
reject(err);
return console.error('Error retrieving access token', err);
}
oAuth2Client.setCredentials(token);
// Store the token to disk for later program executions
writeFile(token_path, JSON.stringify(token), (err) => {
if (err) {
console.error(err);
reject(err);
}
console.log('Token stored to', token_path);
});
resolve(oAuth2Client);
});
});
});
}
}
|
