MapComplete/scripts/serverErrorReport.ts

import { Handler, Server } from "./server"
import Script from "./Script"
import { appendFileSync, existsSync, mkdirSync, writeFileSync } from "fs"
import { mkdir } from "node:fs"
import ScriptUtils from "./ScriptUtils"

class ServerErrorReport extends Script {
    constructor() {
        super("A server which receives and logs error reports")
    }

    async main(args: string[]): Promise<void> {
        const logDirectory = args[0] ?? "./error_logs"
        console.log("Logging to directory", logDirectory)
        if (!existsSync(logDirectory)) {
            mkdirSync(logDirectory)
            console.log("Created this directory")
        }
        let errorReport = 0
        new Server(2348, {}, [
            <Handler>{
                mustMatch: "report",
                mimetype: "application/json",
                handle: async (_, queryParams, req, body) => {
                    if (!body) {
                        throw '{"error": "No body; use a post request"}'
                    }
                    console.log(body)
                    const ip = <string>req.headers["x-forwarded-for"]
                    const d = new Date()
                    const date = d.toISOString()
                    const file =
                        logDirectory +
                        "/" +
                        d.getUTCFullYear() +
                        "_" +
                        d.getUTCMonth() +
                        "_" +
                        d.getUTCDay() +
                        ".lines.json"
                    try {
                        body = JSON.parse(body)
                    } catch (e) {
                        // could not parse, we'll save it as is
                    }
                    const contents =
                        "\n" + JSON.stringify({ ip, index: errorReport, date, message: body })
                    if (!existsSync(file)) {
                        writeFileSync(file, contents)
                    } else {
                        appendFileSync(file, contents)
                    }
                    errorReport++
                    return `{"status":"ok", "nr": ${errorReport}}`
                },
            },
        ])
    }
}

new ServerErrorReport().run()