File size: 6,453 Bytes
fc93158 | 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 | import type { IncomingMessage, ServerResponse } from "node:http";
import {
readJsonWebhookBodyOrReject,
resolveWebhookTargetWithAuthOrReject,
withResolvedWebhookRequestPipeline,
type WebhookInFlightLimiter,
} from "openclaw/plugin-sdk/googlechat";
import { verifyGoogleChatRequest } from "./auth.js";
import type { WebhookTarget } from "./monitor-types.js";
import type {
GoogleChatEvent,
GoogleChatMessage,
GoogleChatSpace,
GoogleChatUser,
} from "./types.js";
function extractBearerToken(header: unknown): string {
const authHeader = Array.isArray(header) ? String(header[0] ?? "") : String(header ?? "");
return authHeader.toLowerCase().startsWith("bearer ")
? authHeader.slice("bearer ".length).trim()
: "";
}
type ParsedGoogleChatInboundPayload =
| { ok: true; event: GoogleChatEvent; addOnBearerToken: string }
| { ok: false };
type ParsedGoogleChatInboundSuccess = Extract<ParsedGoogleChatInboundPayload, { ok: true }>;
function parseGoogleChatInboundPayload(
raw: unknown,
res: ServerResponse,
): ParsedGoogleChatInboundPayload {
if (!raw || typeof raw !== "object" || Array.isArray(raw)) {
res.statusCode = 400;
res.end("invalid payload");
return { ok: false };
}
let eventPayload = raw;
let addOnBearerToken = "";
// Transform Google Workspace Add-on format to standard Chat API format.
const rawObj = raw as {
commonEventObject?: { hostApp?: string };
chat?: {
messagePayload?: { space?: GoogleChatSpace; message?: GoogleChatMessage };
user?: GoogleChatUser;
eventTime?: string;
};
authorizationEventObject?: { systemIdToken?: string };
};
if (rawObj.commonEventObject?.hostApp === "CHAT" && rawObj.chat?.messagePayload) {
const chat = rawObj.chat;
const messagePayload = chat.messagePayload;
eventPayload = {
type: "MESSAGE",
space: messagePayload?.space,
message: messagePayload?.message,
user: chat.user,
eventTime: chat.eventTime,
};
addOnBearerToken = String(rawObj.authorizationEventObject?.systemIdToken ?? "").trim();
}
const event = eventPayload as GoogleChatEvent;
const eventType = event.type ?? (eventPayload as { eventType?: string }).eventType;
if (typeof eventType !== "string") {
res.statusCode = 400;
res.end("invalid payload");
return { ok: false };
}
if (!event.space || typeof event.space !== "object" || Array.isArray(event.space)) {
res.statusCode = 400;
res.end("invalid payload");
return { ok: false };
}
if (eventType === "MESSAGE") {
if (!event.message || typeof event.message !== "object" || Array.isArray(event.message)) {
res.statusCode = 400;
res.end("invalid payload");
return { ok: false };
}
}
return { ok: true, event, addOnBearerToken };
}
export function createGoogleChatWebhookRequestHandler(params: {
webhookTargets: Map<string, WebhookTarget[]>;
webhookInFlightLimiter: WebhookInFlightLimiter;
processEvent: (event: GoogleChatEvent, target: WebhookTarget) => Promise<void>;
}): (req: IncomingMessage, res: ServerResponse) => Promise<boolean> {
return async (req: IncomingMessage, res: ServerResponse): Promise<boolean> => {
return await withResolvedWebhookRequestPipeline({
req,
res,
targetsByPath: params.webhookTargets,
allowMethods: ["POST"],
requireJsonContentType: true,
inFlightLimiter: params.webhookInFlightLimiter,
handle: async ({ targets }) => {
const headerBearer = extractBearerToken(req.headers.authorization);
let selectedTarget: WebhookTarget | null = null;
let parsedEvent: GoogleChatEvent | null = null;
const readAndParseEvent = async (
profile: "pre-auth" | "post-auth",
): Promise<ParsedGoogleChatInboundSuccess | null> => {
const body = await readJsonWebhookBodyOrReject({
req,
res,
profile,
emptyObjectOnEmpty: false,
invalidJsonMessage: "invalid payload",
});
if (!body.ok) {
return null;
}
const parsed = parseGoogleChatInboundPayload(body.value, res);
return parsed.ok ? parsed : null;
};
if (headerBearer) {
selectedTarget = await resolveWebhookTargetWithAuthOrReject({
targets,
res,
isMatch: async (target) => {
const verification = await verifyGoogleChatRequest({
bearer: headerBearer,
audienceType: target.audienceType,
audience: target.audience,
});
return verification.ok;
},
});
if (!selectedTarget) {
return true;
}
const parsed = await readAndParseEvent("post-auth");
if (!parsed) {
return true;
}
parsedEvent = parsed.event;
} else {
const parsed = await readAndParseEvent("pre-auth");
if (!parsed) {
return true;
}
parsedEvent = parsed.event;
if (!parsed.addOnBearerToken) {
res.statusCode = 401;
res.end("unauthorized");
return true;
}
selectedTarget = await resolveWebhookTargetWithAuthOrReject({
targets,
res,
isMatch: async (target) => {
const verification = await verifyGoogleChatRequest({
bearer: parsed.addOnBearerToken,
audienceType: target.audienceType,
audience: target.audience,
});
return verification.ok;
},
});
if (!selectedTarget) {
return true;
}
}
if (!selectedTarget || !parsedEvent) {
res.statusCode = 401;
res.end("unauthorized");
return true;
}
const dispatchTarget = selectedTarget;
dispatchTarget.statusSink?.({ lastInboundAt: Date.now() });
params.processEvent(parsedEvent, dispatchTarget).catch((err) => {
dispatchTarget.runtime.error?.(
`[${dispatchTarget.account.accountId}] Google Chat webhook failed: ${String(err)}`,
);
});
res.statusCode = 200;
res.setHeader("Content-Type", "application/json");
res.end("{}");
return true;
},
});
};
}
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