Fix: error server properly names files, add status endpoint

scripts/serverErrorReport.ts

@@ -1,6 +1,6 @@
 import { Handler, Server } from "./server"
 import Script from "./Script"
-import { appendFileSync, existsSync, mkdirSync, writeFileSync } from "fs"
+import { appendFileSync, existsSync, mkdirSync, readFileSync, writeFileSync } from "fs"
 import { mkdir } from "node:fs"
 import ScriptUtils from "./ScriptUtils"
 
@@ -9,6 +9,17 @@ class ServerErrorReport extends Script {
         super("A server which receives and logs error reports")
     }
 
+    private getFilename(logDirectory: string, d: Date): string {
+        return logDirectory +
+            "/" +
+            d.getUTCFullYear() +
+            "_" +
+            (d.getUTCMonth() + 1) +
+            "_" +
+            d.getUTCDate() +
+            ".lines.json"
+    }
+
     async main(args: string[]): Promise<void> {
         const logDirectory = args[0] ?? "./error_logs"
         console.log("Logging to directory", logDirectory)
@@ -16,33 +27,43 @@ class ServerErrorReport extends Script {
             mkdirSync(logDirectory)
             console.log("Created this directory")
         }
+
         let errorReport = 0
         new Server(2348, {}, [
+            {
+                mustMatch: "status",
+                mimetype: "application/json",
+                handle: async () => {
+                    const filename = this.getFilename(logDirectory, new Date())
+                    let errorsToday = 0
+                    if (existsSync(filename)) {
+                        const contents = readFileSync(filename, "utf8")
+                        errorsToday = contents.split("\n").length
+                    }
+                    return JSON.stringify({
+                        "online": true,
+                        "errors_today": errorsToday
+                    })
+                }
+            },
             <Handler>{
                 mustMatch: "report",
                 mimetype: "application/json",
                 handle: async (_, queryParams, req, body) => {
                     if (!body) {
-                        throw '{"error": "No body; use a post request"}'
+                        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 d = new Date()
+                    const file = this.getFilename(logDirectory, d)
+                    const date = d.toISOString()
                     const contents =
                         "\n" + JSON.stringify({ ip, index: errorReport, date, message: body })
                     if (!existsSync(file)) {
@@ -52,8 +73,8 @@ class ServerErrorReport extends Script {
                     }
                     errorReport++
                     return `{"status":"ok", "nr": ${errorReport}}`
-                },
-            },
+                }
+            }
         ])
     }
 }