Better documentation of server configuration, add error reporting server

scripts/serverErrorReport.ts

@@ -0,0 +1,52 @@
+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()