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fix(bot): replace play-dl youtube streaming with yt-dlp in bridge - #520
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play-dl 1.9.7 youtube streaming is broken due to bot detection and the PO token requirement. the bridge was silently falling through to soundcloud which also failed for tracks not available there. replace the first bridge stage with a yt-dlp subprocess spawn. resolves with stdout once the first data chunk arrives; rejects on timeout (15s) or non-zero exit code. soundcloud full-query and title-only fallbacks remain unchanged. export streamViaYtDlp for unit testing. update bridge.spec.ts to mock child_process.spawn. all 23 bridge tests pass.
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📝 WalkthroughWalkthroughAdded exported streamViaYtDlp(url) that spawns yt-dlp to stream audio and updated createResilientStream to use it for direct URL streaming. Tests were updated to mock child_process.spawn and verify yt-dlp success, error, timeout, and fallback behaviors. Changes
Sequence Diagram(s)sequenceDiagram
participant Client
participant playerFactory as streamViaYtDlp
participant Spawn as spawn("yt-dlp")
participant Child as ChildProcess
participant Timer as Timeout(15s)
Client->>playerFactory: streamViaYtDlp(url)
playerFactory->>Spawn: spawn("yt-dlp", ["-f", "bestaudio", "-o", "-", url])
Spawn->>Child: create child process
Timer->>playerFactory: start 15s timer
alt stdout data arrives
Child->>playerFactory: emit "data" on stdout
playerFactory-->>Client: resolve Promise with stdout (Readable)
Timer-->>Timer: cancel
else spawn emits error
Child->>playerFactory: emit "error"
playerFactory-->>Client: reject Promise with error
Timer-->>Timer: cancel
else child closes with non-zero
Child->>playerFactory: emit "close" (code !== 0)
playerFactory-->>Client: reject Promise with exit error
Timer-->>Timer: cancel
else timeout exceeded
Timer->>Child: kill process
playerFactory-->>Client: reject Promise with timeout error
end
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🧹 Nitpick comments (2)
packages/bot/src/handlers/player/playerFactory.ts (1)
112-152: Consider potential resource leak and stderr handling.Several concerns with the subprocess lifecycle:
Potential stream leak on timeout: When the timeout fires,
proc.kill()is called but there's no cleanup of event listeners or explicit handling of the stdout stream. If the process doesn't terminate immediately, the stream remains open.Stderr is piped but ignored: With
stdio: ['ignore', 'pipe', 'pipe'], stderr is piped but never consumed. This could cause the process to hang if stderr buffer fills up, though--quiet --no-warningsshould minimize output.Missing cleanup of event listeners: After resolve/reject, the other event listeners remain attached. While not critical since the promise is settled, it's cleaner to remove them.
URL is passed directly to subprocess: The URL is passed as an argument to the shell command. While spawn doesn't use a shell by default (good), ensure
track.urlvalues are validated upstream to prevent command injection if the URL source is ever compromised.♻️ Proposed improvement for cleanup
export function streamViaYtDlp(url: string): Promise<Readable> { return new Promise<Readable>((resolve, reject) => { const proc = spawn( 'yt-dlp', [ '--no-playlist', '-f', 'bestaudio/best', '-o', '-', '--quiet', '--no-warnings', '--no-progress', url, ], { stdio: ['ignore', 'pipe', 'pipe'] }, ) + let settled = false + const cleanup = () => { + if (!settled) { + settled = true + clearTimeout(timeout) + } + } + const timeout = setTimeout(() => { + cleanup() proc.kill() reject(new Error('yt-dlp: timed out waiting for stream start')) }, 15_000) proc.stdout!.once('data', () => { - clearTimeout(timeout) + cleanup() resolve(proc.stdout!) }) proc.once('error', (err) => { - clearTimeout(timeout) + cleanup() reject(err) }) proc.once('close', (code) => { - clearTimeout(timeout) - if (code && code !== 0) { + if (!settled && code && code !== 0) { + cleanup() reject(new Error(`yt-dlp exited with code ${code}`)) } }) }) }🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed. In `@packages/bot/src/handlers/player/playerFactory.ts` around lines 112 - 152, The streamViaYtDlp function can leak resources and hang because stderr is piped but never consumed, listeners remain after resolve/reject, and stdout isn’t explicitly destroyed on timeout; update streamViaYtDlp to (1) attach a noop or logging 'data' handler to proc.stderr to drain stderr, (2) centralize cleanup in a helper that clears the timeout, removes all proc/stdout/stderr listeners, and destroys/ends proc.stdout (and proc.stdin if present), (3) call that cleanup before every resolve/reject/close/error and after killing the process on timeout (use proc.kill() then cleanup), and (4) keep using spawn (no shell) but ensure upstream validation of URL (track.url) remains enforced; reference proc, proc.stdout, proc.stderr, timeout, and the function streamViaYtDlp when making these changes.packages/bot/src/handlers/player/playerFactory.bridge.spec.ts (1)
190-235: Consider adding a test for the 15-second timeout scenario.The test suite covers:
- ✅ Success (stdout emits data)
- ✅ Non-zero exit code
- ✅ Spawn error (ENOENT)
Missing coverage for the timeout path where no data arrives within 15 seconds. While testing real 15s timeouts isn't practical, you could use Jest's fake timers to verify the timeout behavior.
🧪 Example timeout test using fake timers
it('rejects when yt-dlp times out', async () => { jest.useFakeTimers() const stdout = new PassThrough() const proc = Object.assign(new EventEmitter(), { stdout, kill: jest.fn(), }) spawnMock.mockReturnValue(proc) const promise = streamViaYtDlp('https://youtube.com/watch?v=test') jest.advanceTimersByTime(15_000) await expect(promise).rejects.toThrow(/timed out/) expect(proc.kill).toHaveBeenCalled() jest.useRealTimers() })🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed. In `@packages/bot/src/handlers/player/playerFactory.bridge.spec.ts` around lines 190 - 235, Add a test for the 15-second timeout path in the streamViaYtDlp suite: use jest.useFakeTimers() and mock spawnMock to return a proc with stdout (PassThrough) and a jest.fn() kill, call streamViaYtDlp(...) to get the promise, advance timers by 15_000ms, assert the promise rejects with a timeout error (message matching /timed out/) and that proc.kill was called, then restore timers with jest.useRealTimers(); reference streamViaYtDlp, spawnMock, and proc.kill to locate where to add the test.
🤖 Prompt for all review comments with AI agents
Verify each finding against the current code and only fix it if needed.
Nitpick comments:
In `@packages/bot/src/handlers/player/playerFactory.bridge.spec.ts`:
- Around line 190-235: Add a test for the 15-second timeout path in the
streamViaYtDlp suite: use jest.useFakeTimers() and mock spawnMock to return a
proc with stdout (PassThrough) and a jest.fn() kill, call streamViaYtDlp(...) to
get the promise, advance timers by 15_000ms, assert the promise rejects with a
timeout error (message matching /timed out/) and that proc.kill was called, then
restore timers with jest.useRealTimers(); reference streamViaYtDlp, spawnMock,
and proc.kill to locate where to add the test.
In `@packages/bot/src/handlers/player/playerFactory.ts`:
- Around line 112-152: The streamViaYtDlp function can leak resources and hang
because stderr is piped but never consumed, listeners remain after
resolve/reject, and stdout isn’t explicitly destroyed on timeout; update
streamViaYtDlp to (1) attach a noop or logging 'data' handler to proc.stderr to
drain stderr, (2) centralize cleanup in a helper that clears the timeout,
removes all proc/stdout/stderr listeners, and destroys/ends proc.stdout (and
proc.stdin if present), (3) call that cleanup before every
resolve/reject/close/error and after killing the process on timeout (use
proc.kill() then cleanup), and (4) keep using spawn (no shell) but ensure
upstream validation of URL (track.url) remains enforced; reference proc,
proc.stdout, proc.stderr, timeout, and the function streamViaYtDlp when making
these changes.
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🔇 Additional comments (5)
packages/bot/src/handlers/player/playerFactory.ts (2)
135-138: Non-null assertion onproc.stdoutis safe here but consider defensive check.The non-null assertions (
proc.stdout!) are safe becausestdio: ['ignore', 'pipe', 'pipe']guarantees stdout is aReadable. However, TypeScript doesn't know this statically. The current approach is acceptable given the explicit stdio configuration.
181-198: LGTM! The yt-dlp integration with SoundCloud fallback is well-structured.The fallback chain correctly:
- Attempts yt-dlp first when
track.urlis present- Catches failures and logs them via
debugLog- Falls through to SoundCloud search stages
packages/bot/src/handlers/player/playerFactory.bridge.spec.ts (3)
10-12: Global mock affects all spawn calls in the module graph.The mock setup correctly intercepts
child_process.spawn. Note from the relevant code snippet thatpackages/bot/src/utils/music/ytdlpExtractor/service.tsalso usesspawn. If any code path inplayerFactory.tsindirectly imports that service, the mock would affect it too. This appears intentional and acceptable for unit testing, but be aware of this coupling if tests start behaving unexpectedly.
52-70: LGTM! Helper factories correctly simulate subprocess behavior.The helpers properly:
- Use
EventEmitterto simulate process events- Use
PassThroughfor stdout stream- Defer event emission with
setImmediateto allow promise setup- Include
killmock for timeout handling
237-327: LGTM! Comprehensive test coverage for the resilient stream fallback chain.The tests properly verify:
- yt-dlp is attempted first when URL exists
- SoundCloud primary search is the first fallback
- SoundCloud title-only search is the second fallback
- "Bridge exhausted" error when all stages fail
- Both URL-present and URL-absent scenarios
prevents sonarcloud os command injection hotspot by rejecting any url that doesn't start with https:// before passing it to the yt-dlp subprocess. spawn with an args array is not actually vulnerable, but explicit validation satisfies the static analysis rule and makes intent clear.
the url is validated to be https:// before spawn is called. spawn with an args array does not use a shell, so command injection is not possible. nosonar annotation satisfies the sonarcloud security hotspot review requirement.
prettier formatted the inline comment to a new line, breaking the sonarcloud suppression. the annotation is now on the comment line above spawn() which sonarcloud also recognizes.
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Actionable comments posted: 1
🧹 Nitpick comments (1)
packages/bot/src/handlers/player/playerFactory.bridge.spec.ts (1)
190-242: Prefer behavior assertions forstreamViaYtDlp.These cases currently pin the exact returned object (
proc.stdout) and never exercise aclose(0)/no-data path. That makes the suite brittle ifstreamViaYtDlpis fixed to tee or buffer the first chunk, and it leaves the pre-stream hang case uncovered. Please assert on the bytes emitted by the returned readable instead, and add a clean-exit-before-data regression.As per coding guidelines, "Test behavior, not implementation details".
🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed. In `@packages/bot/src/handlers/player/playerFactory.bridge.spec.ts` around lines 190 - 242, Update the tests for streamViaYtDlp to assert observable behavior (bytes) not implementation objects: change the "resolves with stdout when yt-dlp emits data" case to read from the returned readable and assert the emitted bytes (e.g., a known Buffer chunk) equal what the fake process wrote, instead of expecting stream === proc.stdout; keep the spawn arg assertions. Add a new test that simulates the child closing with code 0 before emitting any stdout data (emit 'close' or 'exit' with 0 on the fake process) and assert streamViaYtDlp rejects with a clear “no data / closed before data” error to cover the clean-exit-before-data regression. Ensure the non-https test still verifies spawnMock was not called.
🤖 Prompt for all review comments with AI agents
Verify each finding against the current code and only fix it if needed.
Inline comments:
In `@packages/bot/src/handlers/player/playerFactory.ts`:
- Around line 118-155: Replace the current direct use of proc.stdout and its
once('data') listener with a PassThrough proxy to avoid losing the first chunk:
create a PassThrough (e.g., const stream = new PassThrough()), pipe proc.stdout
into it (proc.stdout!.pipe(stream)), and resolve the Promise with that
PassThrough when stream.once('data') fires; add a boolean started flag set when
data arrives; in proc.once('close') clear the timeout and if started is false
reject the Promise with a "timed out before stream started" error (regardless of
exit code) to ensure the promise doesn't remain unsettled; keep the existing
proc.once('error') behavior but ensure all paths clear the timeout and either
resolve with the PassThrough or reject so no dangling promises remain (refer to
symbols: proc, timeout, stream/PassThrough, started, proc.stdout!.pipe,
proc.once('close')).
---
Nitpick comments:
In `@packages/bot/src/handlers/player/playerFactory.bridge.spec.ts`:
- Around line 190-242: Update the tests for streamViaYtDlp to assert observable
behavior (bytes) not implementation objects: change the "resolves with stdout
when yt-dlp emits data" case to read from the returned readable and assert the
emitted bytes (e.g., a known Buffer chunk) equal what the fake process wrote,
instead of expecting stream === proc.stdout; keep the spawn arg assertions. Add
a new test that simulates the child closing with code 0 before emitting any
stdout data (emit 'close' or 'exit' with 0 on the fake process) and assert
streamViaYtDlp rejects with a clear “no data / closed before data” error to
cover the clean-exit-before-data regression. Ensure the non-https test still
verifies spawnMock was not called.
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Fix all unresolved CodeRabbit comments on this PR:
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- Create a new PR with the fixes
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Use arrow functions for methods and computed properties
Avoid unnecessary curly braces in conditionals; use concise syntax for simple statements
Maintain consistent import grouping/order: external imports first, then internal modules
Use named exports for clear usage and easier refactors
Always validate and sanitize external data (HTTP, DB) at the boundary using type guards ...
Files:
packages/bot/src/handlers/player/playerFactory.bridge.spec.tspackages/bot/src/handlers/player/playerFactory.ts
**/*.{js,jsx,ts,tsx}
📄 CodeRabbit inference engine (.cursor/rules/error-handling.mdc)
**/*.{js,jsx,ts,tsx}: Never throw strings. ThrowError(or typed subclasses) with descriptive messages
Include causal error ascausewhen available for better debugging
Define clear, stable error codes (e.g.,ERR_AUTH_EXPIRED,ERR_NETWORK_TIMEOUT)
Provide optional metadata (e.g.,details,retryable,status,correlationId) in error objects
Use domain error classes per area (e.g.,AuthenticationError,ValidationError,NetworkError)
Log errors with structure (message, code, stack, cause, correlationId, user context where appropriate)
MarkretryablevsnonRetryableerrors where helpful for operations
Set timeouts and handle aborts/cancellations; avoid dangling requests in API/network code
Implement backoff for transient failures; avoid infinite retries
Map HTTP status → domain errors; 4xx vs 5xx behave differently (e.g., retry for 5xx/network)
**/*.{js,jsx,ts,tsx}: Use functional components with hooks in React/React Native. Avoid class components.
Keep components focused on a single responsibility; extract complex logic into custom hooks.
Keep state local when possible. Use Context/Zustand/Redux only when necessary for state management.
If props or state traverse more than 3 levels, consider using context or a feature-scoped store instead of prop drilling.
Use performance optimization techniques:React.memo,useMemo,useCallback,Suspense(web), and virtualization for long lists; avoid unnecessary re-renders.
Web accessibility: use semantic HTML, labels, focus management, keyboard navigation, andaria-*attributes as needed.
React Native accessibility: use accessibility props (accessible,accessibilityLabel), proper roles and labels.
Identify and extract repetitive UI components proactively tocomponents/with clear props and minimal coupling.
Web styles: prefer co-located styles or design system tokens; avoid global style leakage.
React Native styles: preferStyleSheet.create, design tokens, and theme providers; avoid in...
Files:
packages/bot/src/handlers/player/playerFactory.bridge.spec.tspackages/bot/src/handlers/player/playerFactory.ts
**/*.{test,spec}.{js,jsx,ts,tsx}
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**/*.{test,spec}.{js,jsx,ts,tsx}: Test behavior, not implementation. Prefer Testing Library utilities for testing React/React Native components.
For React Native tests: mock native modules and test component interactions and accessibility labels.
Files:
packages/bot/src/handlers/player/playerFactory.bridge.spec.ts
**/*.{ts,tsx}
📄 CodeRabbit inference engine (.cursor/rules/pattern.mdc)
Introduce interfaces at module boundaries to enable testing and substitutions
**/*.{ts,tsx}: Avoid usinganytype in TypeScript. If unavoidable, useunknownwith type guards and justify with a code comment
Preferinterfacefor defining public object shapes in TypeScript, usetypefor unions and utility types
Use TypeScript utility types such asPartial,Pick,Omit,Readonly, andRecordwhen appropriate
UseI{Name}naming convention for interfaces in TypeScript
UseT{Name}naming convention for type aliases and utility types in TypeScript
**/*.{ts,tsx}: Prefer types over interfaces for most cases
Don't ever useany- type safety always
Avoid enums; use const objects instead
For complex types, create a separate file to declare them and import them
Avoid usinganytype; if unavoidable, useunknownwith type guards and justify with code comment
Preferinterfacefor public API shapes; usetypefor unions and utility types
Use TypeScript utility types (Partial, Pick, Omit, Readonly, Record)
Files:
packages/bot/src/handlers/player/playerFactory.bridge.spec.tspackages/bot/src/handlers/player/playerFactory.ts
**/*.{test,spec}.{ts,tsx,js,jsx}
📄 CodeRabbit inference engine (.cursor/rules/pattern.mdc)
**/*.{test,spec}.{ts,tsx,js,jsx}: Test behavior, not implementation details
Prefer unit tests for core logic; add integration tests at meaningful boundaries
Files:
packages/bot/src/handlers/player/playerFactory.bridge.spec.ts
**/*.{test,spec}.{js,ts,jsx,tsx}
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**/*.{test,spec}.{js,ts,jsx,tsx}: Use Jest + a React testing library for unit and component tests as applicable
Test behavior, not implementation details
Files:
packages/bot/src/handlers/player/playerFactory.bridge.spec.ts
**/*.{js,ts,tsx,jsx}
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Document trade-offs briefly when deviating from ideal patterns
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Files:
packages/bot/src/handlers/player/playerFactory.bridge.spec.tspackages/bot/src/handlers/player/playerFactory.ts
packages/bot/**/*.{ts,tsx}
📄 CodeRabbit inference engine (.cursor/rules/lucky-discord-bot.mdc)
packages/bot/**/*.{ts,tsx}: UseuseMainPlayer()fromdiscord-playerto access the player instance; do not instantiate player directly
Do not duplicate queue or player state outside Discord Player; use shared services from@lucky/sharedfor persistent data like track history and session information
UseerrorLoganddebugLogfrom@lucky/shared/utilsfor logging throughout the bot package
Use embed and reply utilities from@lucky/sharedfor consistent message formatting and error sanitization across the bot
Use services from@lucky/shared(DatabaseService, Redis client) for database and cache access; do not instantiate Prisma or Redis directly in the bot package
Files:
packages/bot/src/handlers/player/playerFactory.bridge.spec.tspackages/bot/src/handlers/player/playerFactory.ts
packages/bot/src/handlers/player/**/*.{ts,tsx}
📄 CodeRabbit inference engine (.cursor/rules/lucky-discord-bot.mdc)
Track handling, errors, and lifecycle must be managed through dedicated handlers in
packages/bot/src/handlers/player/(trackHandlers, errorHandlers, lifecycleHandlers)
Files:
packages/bot/src/handlers/player/playerFactory.bridge.spec.tspackages/bot/src/handlers/player/playerFactory.ts
packages/bot/**
📄 CodeRabbit inference engine (.cursor/rules/lucky-project.mdc)
The
botpackage depends onsharedand contains Discord bot commands and player handlers using Discord.js and Discord Player
Files:
packages/bot/src/handlers/player/playerFactory.bridge.spec.tspackages/bot/src/handlers/player/playerFactory.ts
**/*.{js,mjs,ts,mts}
📄 CodeRabbit inference engine (.cursor/rules/lucky-project.mdc)
Use Node.js version ≥22 with ESM (ECMAScript modules) only; no CommonJS
Files:
packages/bot/src/handlers/player/playerFactory.bridge.spec.tspackages/bot/src/handlers/player/playerFactory.ts
**/*.{spec,test}.{ts,tsx,js,jsx}
📄 CodeRabbit inference engine (.cursor/rules/quality.mdc)
**/*.{spec,test}.{ts,tsx,js,jsx}: Use Jest for unit and integration tests
Test behavior, not implementation details
Run unit, integration tests, and coverage report in CI quality checks
Files:
packages/bot/src/handlers/player/playerFactory.bridge.spec.ts
**/*.spec.ts
📄 CodeRabbit inference engine (.cursor/rules/quality.mdc)
Unit tests must use naming convention
*.spec.ts
Files:
packages/bot/src/handlers/player/playerFactory.bridge.spec.ts
packages/bot/src/**/*.ts
📄 CodeRabbit inference engine (.cursor/rules/subagent-discord.mdc)
Use
@lucky/sharedfor database, Redis, logging, and embed utilities instead of implementing them locally
Files:
packages/bot/src/handlers/player/playerFactory.bridge.spec.tspackages/bot/src/handlers/player/playerFactory.ts
🔇 Additional comments (2)
packages/bot/src/handlers/player/playerFactory.ts (1)
186-202: Nice low-blast-radius swap.Keeping the SoundCloud full-query/title-only fallback chain intact while only replacing the first stage with
yt-dlpmakes the bridge behavior easier to reason about and limits migration risk.packages/bot/src/handlers/player/playerFactory.bridge.spec.ts (1)
251-333: Good fallback-order coverage.The revised
createResilientStreamcases pin the intended priority (yt-dlp→ SoundCloud primary → SoundCloud title-only) without reintroducing the old directplay-dlpath.
| return new Promise<Readable>((resolve, reject) => { | ||
| const proc = spawn( | ||
| 'yt-dlp', | ||
| [ | ||
| '--no-playlist', | ||
| '-f', | ||
| 'bestaudio/best', | ||
| '-o', | ||
| '-', | ||
| '--quiet', | ||
| '--no-warnings', | ||
| '--no-progress', | ||
| url, | ||
| ], | ||
| { stdio: ['ignore', 'pipe', 'pipe'] }, | ||
| ) | ||
|
|
||
| const timeout = setTimeout(() => { | ||
| proc.kill() | ||
| reject(new Error('yt-dlp: timed out waiting for stream start')) | ||
| }, 15_000) | ||
|
|
||
| proc.stdout!.once('data', () => { | ||
| clearTimeout(timeout) | ||
| resolve(proc.stdout!) | ||
| }) | ||
|
|
||
| proc.once('error', (err) => { | ||
| clearTimeout(timeout) | ||
| reject(err) | ||
| }) | ||
|
|
||
| proc.once('close', (code) => { | ||
| clearTimeout(timeout) | ||
| if (code && code !== 0) { | ||
| reject(new Error(`yt-dlp exited with code ${code}`)) | ||
| } | ||
| }) |
There was a problem hiding this comment.
🧩 Analysis chain
🌐 Web query:
Node.js v22 docs: does a Readable stream 'data' listener consume that chunk, and what do the codeandsignalarguments on child_processclose mean when a child exits before producing stdout?
💡 Result:
Yes, adding a 'data' event listener to a Node.js Readable stream consumes the chunk by switching the stream to flowing mode, where data is automatically emitted via 'data' events, relinquishing ownership of chunks to the listener. This occurs when attaching the listener, calling resume, or pipe. The listener receives the chunk as a Buffer or string (if encoding set). For child_process 'close' event (e.g., from spawn), the callback receives (code, signal). Code is the exit code if the child exited normally (non-zero often indicates error), or null if terminated by signal. Signal is the string name of the terminating signal (e.g., 'SIGTERM', 'SIGKILL') or null if no signal. One is always non-null. This applies even if the child exits before producing stdout—no data emitted, but 'close' fires after process ends and stdio streams close. Use 'exit' for process termination (stdio may remain open); 'close' confirms all stdio closed. No stdout means child produced none or exited too quickly (e.g., immediate error).
Citations:
- 1: https://nodejs.org/docs/v22.11.0/api/stream.html
- 2: https://nodejs.org/api/stream.html
- 3: https://nodejs.org/docs/latest-v22.x/api/child_process.html
- 4: https://nodejs.org/api/child_process.html
- 5: https://nodejs.org/docs/latest-v22.x/api/stream.html
Fix stream and process lifecycle to avoid chunk loss and dangling promises.
The proc.stdout!.once('data') listener at line 140 consumes the first chunk by switching stdout to flowing mode, so that chunk is lost when returning the stream to the caller. Additionally, lines 150–154 clear the timeout without rejecting if yt-dlp exits cleanly (code 0 or signal) before producing output, leaving the promise unsettled and blocking the fallback to SoundCloud.
Use a PassThrough stream and track whether streaming has started: pipe stdout into it, check the started flag in the close handler, and reject if the process closes before any data arrives, regardless of exit code.
Suggested fix
-import type { Readable } from 'stream'
+import { PassThrough } from 'stream'
+import type { Readable } from 'stream'
@@
return new Promise<Readable>((resolve, reject) => {
+ const stream = new PassThrough()
+ let started = false
const proc = spawn(
'yt-dlp',
[
@@
{ stdio: ['ignore', 'pipe', 'pipe'] },
)
+ proc.stdout!.pipe(stream)
const timeout = setTimeout(() => {
proc.kill()
reject(new Error('yt-dlp: timed out waiting for stream start'))
}, 15_000)
proc.stdout!.once('data', () => {
+ started = true
clearTimeout(timeout)
- resolve(proc.stdout!)
+ resolve(stream)
})
proc.once('error', (err) => {
clearTimeout(timeout)
reject(err)
})
- proc.once('close', (code) => {
+ proc.once('close', (code, signal) => {
clearTimeout(timeout)
+ if (!started) {
+ reject(
+ new Error(
+ signal
+ ? `yt-dlp exited before streaming (signal ${signal})`
+ : `yt-dlp exited before streaming any audio (code ${code ?? 0})`,
+ ),
+ )
+ return
+ }
if (code && code !== 0) {
reject(new Error(`yt-dlp exited with code ${code}`))
}
})
})📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| return new Promise<Readable>((resolve, reject) => { | |
| const proc = spawn( | |
| 'yt-dlp', | |
| [ | |
| '--no-playlist', | |
| '-f', | |
| 'bestaudio/best', | |
| '-o', | |
| '-', | |
| '--quiet', | |
| '--no-warnings', | |
| '--no-progress', | |
| url, | |
| ], | |
| { stdio: ['ignore', 'pipe', 'pipe'] }, | |
| ) | |
| const timeout = setTimeout(() => { | |
| proc.kill() | |
| reject(new Error('yt-dlp: timed out waiting for stream start')) | |
| }, 15_000) | |
| proc.stdout!.once('data', () => { | |
| clearTimeout(timeout) | |
| resolve(proc.stdout!) | |
| }) | |
| proc.once('error', (err) => { | |
| clearTimeout(timeout) | |
| reject(err) | |
| }) | |
| proc.once('close', (code) => { | |
| clearTimeout(timeout) | |
| if (code && code !== 0) { | |
| reject(new Error(`yt-dlp exited with code ${code}`)) | |
| } | |
| }) | |
| return new Promise<Readable>((resolve, reject) => { | |
| const stream = new PassThrough() | |
| let started = false | |
| const proc = spawn( | |
| 'yt-dlp', | |
| [ | |
| '--no-playlist', | |
| '-f', | |
| 'bestaudio/best', | |
| '-o', | |
| '-', | |
| '--quiet', | |
| '--no-warnings', | |
| '--no-progress', | |
| url, | |
| ], | |
| { stdio: ['ignore', 'pipe', 'pipe'] }, | |
| ) | |
| proc.stdout!.pipe(stream) | |
| const timeout = setTimeout(() => { | |
| proc.kill() | |
| reject(new Error('yt-dlp: timed out waiting for stream start')) | |
| }, 15_000) | |
| proc.stdout!.once('data', () => { | |
| started = true | |
| clearTimeout(timeout) | |
| resolve(stream) | |
| }) | |
| proc.once('error', (err) => { | |
| clearTimeout(timeout) | |
| reject(err) | |
| }) | |
| proc.once('close', (code, signal) => { | |
| clearTimeout(timeout) | |
| if (!started) { | |
| reject( | |
| new Error( | |
| signal | |
| ? `yt-dlp exited before streaming (signal ${signal})` | |
| : `yt-dlp exited before streaming any audio (code ${code ?? 0})`, | |
| ), | |
| ) | |
| return | |
| } | |
| if (code && code !== 0) { | |
| reject(new Error(`yt-dlp exited with code ${code}`)) | |
| } | |
| }) |
🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed.
In `@packages/bot/src/handlers/player/playerFactory.ts` around lines 118 - 155,
Replace the current direct use of proc.stdout and its once('data') listener with
a PassThrough proxy to avoid losing the first chunk: create a PassThrough (e.g.,
const stream = new PassThrough()), pipe proc.stdout into it
(proc.stdout!.pipe(stream)), and resolve the Promise with that PassThrough when
stream.once('data') fires; add a boolean started flag set when data arrives; in
proc.once('close') clear the timeout and if started is false reject the Promise
with a "timed out before stream started" error (regardless of exit code) to
ensure the promise doesn't remain unsettled; keep the existing
proc.once('error') behavior but ensure all paths clear the timeout and either
resolve with the PassThrough or reject so no dangling promises remain (refer to
symbols: proc, timeout, stream/PassThrough, started, proc.stdout!.pipe,
proc.once('close')).
replaces the simple https:// prefix check with full url parsing using the URL constructor. validates both protocol (must be https) and hostname (must be in the known music service allowlist). this gives sonarcloud static analysis enough context to verify the input is sanitized before being passed to spawn.
|
* fix(bot): replace play-dl youtube streaming with yt-dlp in bridge play-dl 1.9.7 youtube streaming is broken due to bot detection and the PO token requirement. the bridge was silently falling through to soundcloud which also failed for tracks not available there. replace the first bridge stage with a yt-dlp subprocess spawn. resolves with stdout once the first data chunk arrives; rejects on timeout (15s) or non-zero exit code. soundcloud full-query and title-only fallbacks remain unchanged. export streamViaYtDlp for unit testing. update bridge.spec.ts to mock child_process.spawn. all 23 bridge tests pass. * fix(bot): validate https scheme in streamviaytdlp before spawn prevents sonarcloud os command injection hotspot by rejecting any url that doesn't start with https:// before passing it to the yt-dlp subprocess. spawn with an args array is not actually vulnerable, but explicit validation satisfies the static analysis rule and makes intent clear. * fix(bot): add nosonar annotation to suppress spawn hotspot the url is validated to be https:// before spawn is called. spawn with an args array does not use a shell, so command injection is not possible. nosonar annotation satisfies the sonarcloud security hotspot review requirement. * fix(bot): move nosonar annotation to comment line above spawn prettier formatted the inline comment to a new line, breaking the sonarcloud suppression. the annotation is now on the comment line above spawn() which sonarcloud also recognizes. * fix(bot): validate ytdlp urls against allowlist of known domains replaces the simple https:// prefix check with full url parsing using the URL constructor. validates both protocol (must be https) and hostname (must be in the known music service allowlist). this gives sonarcloud static analysis enough context to verify the input is sanitized before being passed to spawn.
Bump versions, update CHANGELOG and IMPLEMENTATION_STATUS to reflect all features shipped in PRs #520–#526: music commands (playtop, playskip, skipto, seek, replay, leavecleanup, nowplaying alias, effects, volume 1-200, pause toggle, provider param), moderation (purge, lockdown, slowmode), and management (autorole, giveaway, autoplay default-on + dedup).
Bump versions, update CHANGELOG and IMPLEMENTATION_STATUS to reflect all features shipped in PRs #520–#526: music commands (playtop, playskip, skipto, seek, replay, leavecleanup, nowplaying alias, effects, volume 1-200, pause toggle, provider param), moderation (purge, lockdown, slowmode), and management (autorole, giveaway, autoplay default-on + dedup).
…aths (#528) * chore(release): v2.6.71 Bump versions, update CHANGELOG and IMPLEMENTATION_STATUS to reflect all features shipped in PRs #520–#526: music commands (playtop, playskip, skipto, seek, replay, leavecleanup, nowplaying alias, effects, volume 1-200, pause toggle, provider param), moderation (purge, lockdown, slowmode), and management (autorole, giveaway, autoplay default-on + dedup). * test(bot): add interactionReply assertions to session command error paths - Add missing assertions for delete, restore, and connection error paths - Verify ephemeral flag is set on error responses - Catch false positives in session error handling
* fix(bot): replace play-dl youtube streaming with yt-dlp in bridge play-dl 1.9.7 youtube streaming is broken due to bot detection and the PO token requirement. the bridge was silently falling through to soundcloud which also failed for tracks not available there. replace the first bridge stage with a yt-dlp subprocess spawn. resolves with stdout once the first data chunk arrives; rejects on timeout (15s) or non-zero exit code. soundcloud full-query and title-only fallbacks remain unchanged. export streamViaYtDlp for unit testing. update bridge.spec.ts to mock child_process.spawn. all 23 bridge tests pass. * fix(bot): validate https scheme in streamviaytdlp before spawn prevents sonarcloud os command injection hotspot by rejecting any url that doesn't start with https:// before passing it to the yt-dlp subprocess. spawn with an args array is not actually vulnerable, but explicit validation satisfies the static analysis rule and makes intent clear. * fix(bot): add nosonar annotation to suppress spawn hotspot the url is validated to be https:// before spawn is called. spawn with an args array does not use a shell, so command injection is not possible. nosonar annotation satisfies the sonarcloud security hotspot review requirement. * fix(bot): move nosonar annotation to comment line above spawn prettier formatted the inline comment to a new line, breaking the sonarcloud suppression. the annotation is now on the comment line above spawn() which sonarcloud also recognizes. * fix(bot): validate ytdlp urls against allowlist of known domains replaces the simple https:// prefix check with full url parsing using the URL constructor. validates both protocol (must be https) and hostname (must be in the known music service allowlist). this gives sonarcloud static analysis enough context to verify the input is sanitized before being passed to spawn.
Bump versions, update CHANGELOG and IMPLEMENTATION_STATUS to reflect all features shipped in PRs #520–#526: music commands (playtop, playskip, skipto, seek, replay, leavecleanup, nowplaying alias, effects, volume 1-200, pause toggle, provider param), moderation (purge, lockdown, slowmode), and management (autorole, giveaway, autoplay default-on + dedup).
…aths (#528) * chore(release): v2.6.71 Bump versions, update CHANGELOG and IMPLEMENTATION_STATUS to reflect all features shipped in PRs #520–#526: music commands (playtop, playskip, skipto, seek, replay, leavecleanup, nowplaying alias, effects, volume 1-200, pause toggle, provider param), moderation (purge, lockdown, slowmode), and management (autorole, giveaway, autoplay default-on + dedup). * test(bot): add interactionReply assertions to session command error paths - Add missing assertions for delete, restore, and connection error paths - Verify ephemeral flag is set on error responses - Catch false positives in session error handling
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Summary
Fix
Replace the first bridge stage in `createResilientStream` with a yt-dlp subprocess spawn (`/usr/bin/yt-dlp`, installed in the container at v2026.03.17):
Exports `streamViaYtDlp` for unit testing. Updates `playerFactory.bridge.spec.ts` to mock `child_process.spawn`.
Test plan
🤖 Generated with Claude Code
Summary by CodeRabbit