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KeithRyanWongKeithRyanWong
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move code to wrapper
1 parent 99005db commit 10717e1

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-63
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3 files changed

+82
-63
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‎src/api/resources/webhooks/client/Client.ts

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Original file line numberDiff line numberDiff line change
@@ -8,7 +8,6 @@ import * as Webflow from "../../../index";
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import urlJoin from "url-join";
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import * as serializers from "../../../../serialization/index";
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import * as errors from "../../../../errors/index";
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import crypto from "crypto";
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export declare namespace Webhooks {
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interface Options {
@@ -26,75 +25,13 @@ export declare namespace Webhooks {
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/** Additional headers to include in the request. */
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headers?: Record<string, string>;
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}
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interface RequestSignatureDetails {
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/** The headers of the incoming webhook request as a record-like object */
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headers: Record<string, string>;
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/** The body of the incoming webhook request as a string */
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body: string;
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/** The secret key generated when creating the webhook or the OAuth client secret */
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secret: string;
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}
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}
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/**
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* Webhooks are the webhooks in your Webflow site.
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*/
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export class Webhooks {
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constructor(protected readonly _options: Webhooks.Options) {}
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/**
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* Verify that the signature on the webhook message is from Webflow
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* @link https://developers.webflow.com/data/docs/working-with-webhooks#validating-request-signatures
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*
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* @param {Webhooks.RequestSignatureDetails.headers} requestSignatureDetails - details of the incoming webhook request
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* @example
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* function incomingWebhookRouteHandler(req, res) {
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* const headers = req.headers;
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* const body = JSON.stringify(req.body);
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* const secret = getWebhookSecret(WEBHOOK_ID);
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* const isAuthenticated = await client.webhooks.verifySignature({ headers, body, secret });
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*
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* if (isAuthenticated) {
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* // Process the webhook
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* } else {
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* // Alert the user that the webhook is not authenticated
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* }
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* res.sendStatus(200);
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* }
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*
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*/
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public async verifySignature({ headers, body, secret }: Webhooks.RequestSignatureDetails): Promise<boolean> {
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// Creates a HMAC signature following directions from https://developers.webflow.com/data/docs/working-with-webhooks#steps-to-validate-the-request-signature
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const createHmac = async (signingSecret: string, message: string) => {
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const encoder = new TextEncoder();
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// Encode the signingSecret key
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// @ts-expect-error TS2339: Property 'subtle' does not exist on type 'typeof import("crypto")'.
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const key = await crypto.subtle.importKey(
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"raw",
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encoder.encode(signingSecret),
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{ name: "HMAC", hash: "SHA-256" },
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false,
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["sign"]
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);
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// Encode the message and compute HMAC signature
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// @ts-expect-error TS2339: Property 'subtle' does not exist on type 'typeof import("crypto")'.
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const signature = await crypto.subtle.sign("HMAC", key, encoder.encode(message));
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// Convert signature to hex string
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return Array.from(new Uint8Array(signature))
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.map((b) => b.toString(16).padStart(2, "0"))
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.join("");
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};
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const message = `${headers["x-webflow-timestamp"]}:${body}`;
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const generatedSignature = await createHmac(secret, message);
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return headers["x-webflow-signature"] === generatedSignature;
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}
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/**
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* List all App-created Webhooks registered for a given site
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*

‎src/wrapper/WebflowClient.ts

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Original file line numberDiff line numberDiff line change
@@ -4,12 +4,20 @@ import { OauthScope } from "../api/types/OAuthScope";
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import * as core from "../core";
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import * as errors from "../errors";
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import { SDK_VERSION } from "../version";
7+
import { Client as Webhooks } from "./WebhooksClient";
78

89
export class WebflowClient extends FernClient {
910
constructor(protected readonly _options: FernClient.Options) {
1011
super(_options);
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}
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protected _webhooks: Webhooks | undefined;
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public get webhooks(): Webhooks {
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return (this._webhooks ??= new Webhooks(this._options));
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}
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/**
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* @param clientId The OAuth client ID
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* @param state The state

‎src/wrapper/WebhooksClient.ts

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,74 @@
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import { Webhooks } from "../api/resources/webhooks/client/Client";
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import crypto from "crypto";
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// Extends the namespace declared in the Fern generated client
5+
declare module "../api/resources/webhooks/client/Client" {
6+
export namespace Webhooks {
7+
interface RequestSignatureDetails {
8+
/** The headers of the incoming webhook request as a record-like object */
9+
headers: Record<string, string>;
10+
/** The body of the incoming webhook request as a string */
11+
body: string;
12+
/** The secret key generated when creating the webhook or the OAuth client secret */
13+
secret: string;
14+
}
15+
}
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}
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18+
export class Client extends Webhooks {
19+
constructor(protected readonly _options: Webhooks.Options) {
20+
super(_options);
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}
22+
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/**
24+
* Verify that the signature on the webhook message is from Webflow
25+
* @link https://developers.webflow.com/data/docs/working-with-webhooks#validating-request-signatures
26+
*
27+
* @param {Webhooks.RequestSignatureDetails.headers} requestSignatureDetails - details of the incoming webhook request
28+
* @example
29+
* function incomingWebhookRouteHandler(req, res) {
30+
* const headers = req.headers;
31+
* const body = JSON.stringify(req.body);
32+
* const secret = getWebhookSecret(WEBHOOK_ID);
33+
* const isAuthenticated = await client.webhooks.verifySignature({ headers, body, secret });
34+
*
35+
* if (isAuthenticated) {
36+
* // Process the webhook
37+
* } else {
38+
* // Alert the user that the webhook is not authenticated
39+
* }
40+
* res.sendStatus(200);
41+
* }
42+
*
43+
*/
44+
public async verifySignature({ headers, body, secret }: Webhooks.RequestSignatureDetails): Promise<boolean> {
45+
// Creates a HMAC signature following directions from https://developers.webflow.com/data/docs/working-with-webhooks#steps-to-validate-the-request-signature
46+
const createHmac = async (signingSecret: string, message: string) => {
47+
const encoder = new TextEncoder();
48+
49+
// Encode the signingSecret key
50+
// @ts-expect-error TS2339: Property 'subtle' does not exist on type 'typeof import("crypto")'.
51+
const key = await crypto.subtle.importKey(
52+
"raw",
53+
encoder.encode(signingSecret),
54+
{ name: "HMAC", hash: "SHA-256" },
55+
false,
56+
["sign"]
57+
);
58+
59+
// Encode the message and compute HMAC signature
60+
// @ts-expect-error TS2339: Property 'subtle' does not exist on type 'typeof import("crypto")'.
61+
const signature = await crypto.subtle.sign("HMAC", key, encoder.encode(message));
62+
63+
// Convert signature to hex string
64+
return Array.from(new Uint8Array(signature))
65+
.map((b) => b.toString(16).padStart(2, "0"))
66+
.join("");
67+
};
68+
69+
const message = `${headers["x-webflow-timestamp"]}:${body}`;
70+
71+
const generatedSignature = await createHmac(secret, message);
72+
return headers["x-webflow-signature"] === generatedSignature;
73+
}
74+
}

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