WebSocket handshake: Unexpected response code: 400

[nishantbhat]

Description

Related Issues

WebSocket connection to 'ws://localhost:8443/' failed: Error during WebSocket handshake: Unexpected response code: 400
error on browser

[sr229]

Can you provide more info? Your issue does not detail your error. I also need your diagnostic information

[nishantbhat]

I clone the repo and build it locally for the latest updates when I start it on browser console it showing the above error.

[sr229]

This does not tell the whole picture. We need the following:

• Server Logs
• your System information (OS and Version [for Linux, specify Kernel and GLIBC version]).

We can't help you if you don't have these prerequisites - it helps us to get a better picture and allow to reproduce it.

[sr229]

I also want to point out you might have WebRTC disabled as well - check if you have a WebRTC blocker. If you do, you can't use code-server.

[zxti]

I'm also seeing this. I'm using MacOS 10.14.

This is what I did:

git clone https://github.com/codercom/code-server.git
cd code-server
yarn
yarn task build:server:binary
yarn start

https://localhost:8443/ just shows a black screen forever, and the JS console repeatedly prints every few seconds:

WebSocket connection to 'ws://localhost:8443/' failed: Error during WebSocket handshake: Unexpected response code: 400
(anonymous) @ client.ts:110
step @ tslib.es6.js:117
(anonymous) @ tslib.es6.js:98
(anonymous) @ tslib.es6.js:91
__awaiter @ tslib.es6.js:87
WebsocketConnection.openSocket @ client.ts:103
(anonymous) @ client.ts:63
step @ tslib.es6.js:117
(anonymous) @ tslib.es6.js:98
(anonymous) @ tslib.es6.js:91
__awaiter @ tslib.es6.js:87
WebsocketConnection.connect @ client.ts:58
(anonymous) @ client.ts:17
Retry.runItem @ retry.ts:164
(anonymous) @ retry.ts:126

I'm at commit 742dd6f.

[sr229]

CC @multishifties if this is known

[MichaelDesantis]

This is a known Error. Unfortunately I have yet to determine the cause of this.

[MichaelDesantis]

@nishantbhat May I suggest you change this title to WebSocket handshake: Unexpected response code: 400 so that other users may find it and avoid duplicate issues? (please?)

[hyunjun529]

I had same situation, but I turned on and off a few times and wait a minute. then it was fixed.

but I don't know why.

I use CentOS 7.x, and used 72152f7 commit

yarn
yarn task build:server:binary
yarn start

INFO  webpack {"message":"wait until bundle finished: /"}
webpack built 914fd503f1fcdf6cd102 in 21813ms
WARN  webpack {"message":"\nWARNING in ./lib/vscode/src/vs/workbench/services/extensions/electron-browser/cachedExtensionScanner.ts 326:96-103\nCritical dependency: require function is used in a way in which dependencies cannot be statically extracted\n\nWARNING in ./lib/vscode/src/vs/platform/environment/node/environmentService.ts 76:74-81\nCritical dependency: require function is used in a way in which dependencies cannot be statically extracted\n\nWARNING in ./lib/vscode/src/vs/workbench/contrib/debug/node/debugger.ts 259:72-79\nCritical dependency: require function is used in a way in which dependencies cannot be statically extracted\n\nWARNING in ./lib/vscode/src/vs/workbench/contrib/cli/node/cli.contribution.ts 30:46-53\nCritical dependency: require function is used in a way in which dependencies cannot be statically extracted\n\nWARNING in ./lib/vscode/src/vs/workbench/contrib/performance/electron-browser/perfviewEditor.ts 243:39-46\nCritical dependency: require function is used in a way in which dependencies cannot be statically extracted\n\nWARNING in ./lib/vscode/src/vs/workbench/contrib/externalTerminal/electron-browser/externalTerminalService.ts 113:60-67\nCritical dependency: require function is used in a way in which dependencies cannot be statically extracted\n\nWARNING in ./lib/vscode/src/vs/base/node/processes.ts 54:49-56\nCritical dependency: require function is used in a way in which dependencies cannot be statically extracted\n\nWARNING in ./lib/vscode/src/vs/workbench/services/extensions/electron-browser/cachedExtensionScanner.ts 31:84-91\nCritical dependency: require function is used in a way in which dependencies cannot be statically extracted\n\nWARNING in ./lib/vscode/src/vs/workbench/services/extensions/electron-browser/cachedExtensionScanner.ts 38:92-99\nCritical dependency: require function is used in a way in which dependencies cannot be statically extracted\n\nWARNING in ./lib/vscode/src/vs/platform/environment/node/environmentService.ts 183:75-82\nCritical dependency: require function is used in a way in which dependencies cannot be statically extracted\n\nWARNING in ./lib/vscode/src/vs/workbench/services/extensions/electron-browser/extensionHost.ts 143:94-101\nCritical dependency: require function is used in a way in which dependencies cannot be statically extracted\n\nWARNING in ./lib/vscode/node_modules/getmac/index.js 3:63-70\nCritical dependency: require function is used in a way in which dependencies cannot be statically extracted\n\nWARNING in ./lib/vscode/src/vs/workbench/services/files/node/watcher/win32/csharpWatcherService.ts 35:58-65\nCritical dependency: require function is used in a way in which dependencies cannot be statically extracted\n\nWARNING in ./lib/vscode/src/vs/workbench/services/files/node/watcher/nsfw/watcherService.ts 30:68-75\nCritical dependency: require function is used in a way in which dependencies cannot be statically extracted\n\nWARNING in ./lib/vscode/src/vs/workbench/services/files/node/watcher/unix/watcherService.ts 31:68-75\nCritical dependency: require function is used in a way in which dependencies cannot be statically extracted\n\nWARNING in ./lib/vscode/src/vs/workbench/services/search/node/searchService.ts 412:72-79\nCritical dependency: require function is used in a way in which dependencies cannot be statically extracted\n\nWARNING in ./lib/vscode/src/vs/workbench/contrib/debug/node/terminals.ts 124:60-67\nCritical dependency: require function is used in a way in which dependencies cannot be statically extracted\n\nWARNING in ./lib/vscode/src/vs/editor/common/services/editorSimpleWorker.ts 464:12-474:22\nCritical dependency: the request of a dependency is an expression\n\nWARNING in ./lib/vscode/node_modules/vscode-textmate/release/main.js 14:15-27\nCritical dependency: the request of a dependency is an expression"}
INFO  webpack {"message":"Compiled with warnings."}
INFO  WebSocket opened / {"client":1,"ip":"🚫"}
INFO  WebSocket closed / {"client":1,"code":1001}
INFO  Wrote resource {"path":"🚫/code-server/User/workspaceStorage/1fab9dc45b76f1e6a06b4bc07a1e63c6/state.json","content-length":2}
INFO  WebSocket opened / {"client":2,"ip":"🚫"}

[sr229]

From what I can tell this might be a misconfigured reverse proxy, or the network is actively blocking WebRTC requests.

[sr229]

Issue is marked stale. Closing as no longer relevant to current tree.