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| 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 | 1x | import {
EncryptedValue,
generateJwt,
issueChannelAccessToken,
} from "@messaging-gateway/lib";
import { PrismaClient } from "@prisma/client";
import { messagingApi, HTTPFetchError } from "@line/bot-sdk";
import { v4 as uuidv4 } from "uuid";
import { Env } from "@/Env";
import { Logger } from "@/Logger";
import { ErrorObject } from "@/types/api";
import express from "express";
export async function POST(
env: Env,
parentLogger: Logger,
req: express.Request,
res: express.Response
) {
const requestId = uuidv4();
const logger = parentLogger.child({ requestId });
const channelId = req.get("X-MessagingGateway-Line-Channel-Id");
const body = req.body as messagingApi.PushMessageRequest;
logger.info("received request", { channelId, body });
if (!channelId) {
const errObj: ErrorObject = {
message: "X-MessagingGateway-Line-Channel-Id is empty or not exists",
};
res.status(400).json(errObj);
return;
}
const childLogger = logger.child({ channelId });
const resObj = await sendMessage(env, channelId, body, childLogger);
if (typeof resObj === "string") {
const errObj: ErrorObject = { message: resObj };
res.status(400).json(errObj);
} else {
childLogger.info("success to send message");
res.status(200).json(resObj);
}
}
async function sendMessage(
env: Env,
channelId: string,
body: messagingApi.PushMessageRequest,
logger: Logger
): Promise<messagingApi.PushMessageResponse | string> {
const prisma = new PrismaClient();
const lineChannel = await prisma.line_channels.findUnique({
where: {
id: channelId,
},
});
if (!lineChannel) {
logger.error("failed to find lineChannel, channel is not found");
return `channel(id=${channelId}) is not found`;
}
logger.debug("found lineChannel record");
const encryptedSecretKey = EncryptedValue.makeFromSerializedText(
lineChannel.encrypted_secret_key
);
const secretKey = encryptedSecretKey.decrypt(env.encryptionPassword);
logger.debug("decrypted secret key");
const kid = lineChannel.kid;
const tokenExpSec = 60 * 1;
const jwt = await generateJwt(channelId, secretKey.value(), kid, tokenExpSec);
logger.debug("generated jwt");
let accessToken: string;
try {
const result = await issueChannelAccessToken(jwt);
accessToken = result.accessToken;
} catch (err) {
let msg = "failed to issue channel access token";
if (err instanceof HTTPFetchError) {
try {
const body = JSON.parse(err.body);
msg += `, ${body.error}(${body.error_description})`;
} catch (err) {
logger.warn("failed to parse response", { message: err });
}
}
logger.error(msg, { message: err });
return msg;
}
logger.debug("issued channel access token");
const client = new messagingApi.MessagingApiClient({
channelAccessToken: accessToken,
});
try {
return await client.pushMessage(body);
} catch (err) {
let msg = "failed to push message";
try {
if (err instanceof HTTPFetchError) {
const body = JSON.parse(err.body) as messagingApi.ErrorResponse;
for (const detail of body.details) {
msg += `, ${detail.message}(${detail.property})`;
}
}
} catch (err) {
logger.warn("failed to parse response", { message: err });
}
logger.error(msg, { message: err });
return msg;
}
}
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