refactor: simplify logging and catch errors

src/decrypt-worker/worker/handler/decrypt.ts

@@ -19,7 +19,7 @@ class DecryptCommandHandler {
     this.label = `DecryptCommandHandler(${label})`;
   }
 
-  log<R>(label: string, fn: () => R): R {
+  log<R>(label: string, fn: () => Promise<R>): Promise<R> {
     return timedLogger(`${this.label}: ${label}`, fn);
   }
 
@@ -52,7 +52,7 @@ class DecryptCommandHandler {
   }
 
   async tryDecryptWith(decipher: DecipherInstance) {
-    const result = await this.log(`decrypt ${decipher.cipherName}`, async () =>
+    const result = await this.log(`try decrypt with ${decipher.cipherName}`, async () =>
       decipher.decrypt(this.buffer, this.options),
     );
     switch (result.status) {
@@ -79,8 +79,9 @@ class DecryptCommandHandler {
   }
 }
 
-export const workerDecryptHandler = async ({ id, blobURI, options }: DecryptCommandPayload) => {
+export const workerDecryptHandler = async ({ id: payloadId, blobURI, options }: DecryptCommandPayload) => {
   await umCryptoReady;
+  const id = payloadId.replace('://', ':');
   const label = `decrypt(${id})`;
   return withTimeGroupedLogs(label, async () => {
     const buffer = await fetch(blobURI).then((r) => r.arrayBuffer());

src/decrypt-worker/worker/handler/qmcv2_parser.ts

@@ -1,26 +1,16 @@
 import { fetchParakeet, FooterParserState } from '@um/libparakeet';
 import type { FetchMusicExNamePayload } from '~/decrypt-worker/types';
 import { makeQMCv2FooterParser } from '~/decrypt-worker/util/qmc2KeyCrypto';
-import { timedLogger, withGroupedLogs as withTimeGroupedLogs } from '~/util/logUtils';
+import { timedLogger } from '~/util/logUtils.ts';
 
 export const workerParseMusicExMediaName = async ({ id, blobURI }: FetchMusicExNamePayload) => {
-  const label = `decrypt(${id})`;
-  return withTimeGroupedLogs(label, async () => {
-    const parakeet = await timedLogger(`${label}/init`, fetchParakeet);
-    const blob = await timedLogger(`${label}/fetch-src`, async () =>
-      fetch(blobURI, { headers: { Range: 'bytes=-1024' } }).then((r) => r.blob()),
-    );
+  const label = `qmcMusixEx(${id.replace('://', ':')})`;
+  return timedLogger(label, async () => {
+    const parakeet = await fetchParakeet();
+    const blob = await fetch(blobURI, { headers: { Range: 'bytes=-1024' } }).then((r) => r.blob());
+    const buffer = await blob.arrayBuffer();
 
-    const buffer = await timedLogger(`${label}/read-src`, async () => {
-      // Firefox: the range header does not work...?
-      const blobBuffer = await blob.arrayBuffer();
-      if (blobBuffer.byteLength > 1024) {
-        return blobBuffer.slice(-1024);
-      }
-      return blobBuffer;
-    });
-
-    const parsed = makeQMCv2FooterParser(parakeet).parse(buffer);
+    const parsed = makeQMCv2FooterParser(parakeet).parse(buffer.slice(-1024));
     if (parsed.state === FooterParserState.OK) {
       return parsed.mediaName;
     }

src/util/fnWrapper.ts

@@ -1,20 +1,13 @@
-function isPromise<T = unknown>(p: unknown): p is Promise<T> {
-  return !!p && typeof p === 'object' && 'then' in p && 'catch' in p && 'finally' in p;
-}
-
-export function wrapFunctionCall<R = unknown>(pre: () => void, post: () => void, fn: () => R): R {
+export async function wrapFunctionCall<R = unknown>(
+  pre: () => void,
+  post: () => void,
+  fn: () => Promise<R>,
+): Promise<R> {
   pre();
 
   try {
-    const result = fn();
-
-    if (isPromise(result)) {
-      result.finally(post);
-    }
-
-    return result;
-  } catch (e) {
+    return await fn();
+  } finally {
     post();
-    throw e;
   }
 }

src/util/logUtils.ts

@@ -1,6 +1,6 @@
 import { wrapFunctionCall } from './fnWrapper';
 
-export function timedLogger<R = unknown>(label: string, fn: () => R): R {
+export async function timedLogger<R = unknown>(label: string, fn: () => Promise<R>): Promise<R> {
   if (import.meta.env.VITE_ENABLE_PERF_LOG !== '1') {
     return fn();
   } else {
@@ -12,13 +12,13 @@ export function timedLogger<R = unknown>(label: string, fn: () => R): R {
   }
 }
 
-export function withGroupedLogs<R = unknown>(label: string, fn: () => R): R {
+export async function withGroupedLogs<R = unknown>(label: string, fn: () => Promise<R>): Promise<R> {
   if (import.meta.env.VITE_ENABLE_PERF_LOG !== '1') {
     return fn();
   } else {
     return wrapFunctionCall(
       () => console.group(label),
-      () => (console.groupEnd as (label: string) => void)(label),
+      () => console.groupEnd(),
       () => timedLogger(`${label}/total`, fn),
     );
   }