-
Notifications
You must be signed in to change notification settings - Fork 81
/
middleware.ts
100 lines (84 loc) · 2.78 KB
/
middleware.ts
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
// remove type imports from http for Deno compatibility
// see https://github.com/octokit/octokit.js/issues/24#issuecomment-817361886
// import { IncomingMessage, ServerResponse } from "http";
type IncomingMessage = any;
type ServerResponse = any;
import { WebhookEventName } from "@octokit/webhooks-types";
import { Webhooks } from "../../index";
import { WebhookEventHandlerError } from "../../types";
import { MiddlewareOptions } from "./types";
import { getMissingHeaders } from "./get-missing-headers";
import { getPayload } from "./get-payload";
export async function middleware(
webhooks: Webhooks,
options: Required<MiddlewareOptions>,
request: IncomingMessage,
response: ServerResponse,
next?: Function
) {
let pathname: string;
try {
pathname = new URL(request.url as string, "http://localhost").pathname;
} catch (error) {
response.writeHead(422, {
"content-type": "application/json",
});
response.end(
JSON.stringify({
error: `Request URL could not be parsed: ${request.url}`,
})
);
return;
}
const isUnknownRoute = request.method !== "POST" || pathname !== options.path;
const isExpressMiddleware = typeof next === "function";
if (isUnknownRoute) {
if (isExpressMiddleware) {
return next!();
} else {
return options.onUnhandledRequest(request, response);
}
}
const missingHeaders = getMissingHeaders(request).join(", ");
if (missingHeaders) {
response.writeHead(400, {
"content-type": "application/json",
});
response.end(
JSON.stringify({
error: `Required headers missing: ${missingHeaders}`,
})
);
return;
}
const eventName = request.headers["x-github-event"] as WebhookEventName;
const signatureSHA256 = request.headers["x-hub-signature-256"] as string;
const id = request.headers["x-github-delivery"] as string;
options.log.debug(`${eventName} event received (id: ${id})`);
// GitHub will abort the request if it does not receive a response within 10s
// See https://github.com/octokit/webhooks.js/issues/185
let didTimeout = false;
const timeout = setTimeout(() => {
didTimeout = true;
response.statusCode = 202;
response.end("still processing\n");
}, 9000).unref();
try {
const payload = await getPayload(request);
await webhooks.verifyAndReceive({
id: id,
name: eventName as any,
payload: payload as any,
signature: signatureSHA256,
});
clearTimeout(timeout);
if (didTimeout) return;
response.end("ok\n");
} catch (error) {
clearTimeout(timeout);
if (didTimeout) return;
const statusCode = Array.from(error as WebhookEventHandlerError)[0].status;
response.statusCode = typeof statusCode !== "undefined" ? statusCode : 500;
response.end(String(error));
}
}