Nothing at this URL

init info:

Serving Flask app 'app' (lazy loading)
Environment: production
WARNING: This is a development server. Do not use it in a production deployment.
Use a production WSGI server instead.
Debug mode: on
Running on http://127.0.0.1:5000/ (Press CTRL+C to quit)
Restarting with stat
Debugger is active!
Debugger PIN: 302-914-847

visit http://127.0.0.1:5000/, get
{
"error": "Sorry, Nothing at this URL."
}

You probably need to build the client:

$ npm install
$ npm run webpack

Error 500
Unknown mime type.

You probably need to build the client:
$ npm install
$ npm run webpack

Error 500 Unknown mime type.
You probably need to build the client:
$ npm install
$ npm run webpack

GET /heatmap/?filename=perf.test01&type=perf&rows=50 HTTP/1.1" 500
node version v18.12.1

Updates readme to avoid Netflix#169

@zpget

Had the same issue (nothing at url) - the npm install commands fixed it, doing a PR to update the readme. Thanks for the suggested fix @zpget

I had the same issue. Rinning python run.py resulted in the "Sorry, Nothing at this URL." error. Installing

$ npm install
$ npm run webpack

fixed it.

Caused by: #150

This doesn't quite fix it for me:

flamescope (master @ be26595) ~> npm install
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@2.3.2 (node_modules/fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@2.3.2: wanted {"os":"darwin","arch":"any"} (current: {"os":"linux","arch":"x64"})

added 908 packages from 462 contributors in 14.683s

105 packages are looking for funding
  run `npm fund` for details


flamescope (master @ be26595) ~> npm run webpack

> flamescope@0.3.0 webpack /tmp/dockerv/flamescope
> NODE_ENV=production webpack --mode production

[webpack-cli] SyntaxError: Invalid regular expression: /(\p{Uppercase_Letter}+|\p{Lowercase_Letter}|\d)(\p{Uppercase_Letter}+)/: Invalid escape
    at pathToArgumentName (/tmp/dockerv/flamescope/node_modules/webpack/lib/cli.js:66:4)
    at addFlag (/tmp/dockerv/flamescope/node_modules/webpack/lib/cli.js:170:16)
    at traverse (/tmp/dockerv/flamescope/node_modules/webpack/lib/cli.js:243:21)
    at traverse (/tmp/dockerv/flamescope/node_modules/webpack/lib/cli.js:299:23)
    at traverse (/tmp/dockerv/flamescope/node_modules/webpack/lib/cli.js:248:24)
    at Object.getArguments (/tmp/dockerv/flamescope/node_modules/webpack/lib/cli.js:308:2)
    at WebpackCLI.getBuiltInOptions (/tmp/dockerv/flamescope/node_modules/webpack-cli/lib/webpack-cli.js:905:41)
    at makeCommand (/tmp/dockerv/flamescope/node_modules/webpack-cli/lib/webpack-cli.js:1066:22)
    at <anonymous>
    at process._tickCallback (internal/process/next_tick.js:189:7)
npm ERR! code ELIFECYCLE
npm ERR! errno 2
npm ERR! flamescope@0.3.0 webpack: `NODE_ENV=production webpack --mode production`
npm ERR! Exit status 2
npm ERR!
npm ERR! Failed at the flamescope@0.3.0 webpack script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /home/tanwang/.npm/_logs/2023-10-18T15_26_44_965Z-debug.log

@SinOverCos

@SinOverCos
That looks like a separate error that the project isn't building properly for you (although strangely it looks like it's an error in the webpack code), I'd open a separate issue about that

This also doesn't quite fix it for me:

Ubuntu 20.04.6 LTS nodejs v10.19.0

$ npm run webpack
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@2.3.2 (node_modules/fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@2.3.2: wanted {"os":"darwin","arch":"any"} (current: {"os":"linux","arch":"x64"})

added 908 packages from 462 contributors in 9.671s

109 packages are looking for funding
  run `npm fund` for details

$ npm run webpack

> flamescope@0.3.0 webpack /home/zhuxing/flamescope
> NODE_ENV=production webpack --mode production

Browserslist: caniuse-lite is outdated. Please run:
  npx browserslist@latest --update-db
  Why you should do it regularly: https://github.com/browserslist/browserslist#browsers-data-updating
assets by status 592 KiB [cached] 2 assets
orphan modules 462 KiB [orphan] 339 modules
runtime modules 1.25 KiB 6 modules
modules by path ./node_modules/ 1.14 MiB 400 modules
modules by path ./src/ 309 KiB
  ./src/index.jsx + 145 modules 308 KiB [built] [code generated]
  ./node_modules/css-loader/dist/cjs.js!./node_modules/less-loader/dist/cjs.js??ruleSet[1].rules[1].use[2]!./src/components/FlameGraph/flamegraph.less 497 bytes [built] [code generated]
  ./node_modules/css-loader/dist/cjs.js!./node_modules/less-loader/dist/cjs.js??ruleSet[1].rules[1].use[2]!./src/components/Heatmap/heatmap.less 1020 bytes [built] [code generated]
./node_modules/css-loader/dist/cjs.js!./node_modules/less-loader/dist/cjs.js??ruleSet[1].rules[1].use[2]!./semantic/semantic.less 39 bytes [built] [code generated] [1 error]

ERROR in ./semantic/semantic.less (./node_modules/css-loader/dist/cjs.js!./node_modules/less-loader/dist/cjs.js??ruleSet[1].rules[1].use[2]!./semantic/semantic.less)
Module build failed (from ./node_modules/less-loader/dist/cjs.js):


@import url(https://fonts.googleapis.com/css?family=Roboto);
^
Resource 'https://fonts.googleapis.com/css?family=Roboto' gave this Error:
  Error: socket hang up

      Error in  /home/zhuxing/flamescope/node_modules/semantic-ui-less/themes/material/collections/menu.overrides (line 1, column 0)
Error:

@import url(https://fonts.googleapis.com/css?family=Roboto);
^
Resource 'https://fonts.googleapis.com/css?family=Roboto' gave this Error:
  Error: socket hang up

      Error in  /home/zhuxing/flamescope/node_modules/semantic-ui-less/themes/material/collections/menu.overrides (line 1, column 0)
    at Object.lessLoader ( /home/zhuxing/flamescope/node_modules/less-loader/dist/index.js:54:14)
 @ ./semantic/semantic.less 8:6-171 22:17-24 26:0-141 26:0-141 27:22-29 27:33-47 27:50-64
 @ ./src/App.jsx 23:0-35
 @ ./src/index.jsx 25:0-24 34:7-10

webpack 5.58.2 compiled with 1 error in 34687 ms
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! flamescope@0.3.0 webpack: `NODE_ENV=production webpack --mode production`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the flamescope@0.3.0 webpack script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!      /home/zhuxing/.npm/_logs/2023-10-26T14_06_57_007Z-debug.log

okay, I copy the app/public from https://github.com/Netflix/flamescope/tree/v0.2.0 to the master branch, it works. Consider it as a temporary workaround.

The webpack command doesn't work, I get yet another error:

$ npm run webpack

> flamescope@0.3.0 webpack
> NODE_ENV=production webpack --mode production

node:internal/crypto/hash:103
  this[kHandle] = new _Hash(algorithm, xofLen, algorithmId, getHashCache());
                  ^

Error: error:0308010C:digital envelope routines::unsupported
    at new Hash (node:internal/crypto/hash:103:19)
    at Object.createHash (node:crypto:137:10)
    at BulkUpdateDecorator.hashFactory (/home/arvid/src/profiling/flamescope/node_modules/webpack/lib/util/createHash.js:155:18)
    at BulkUpdateDecorator.digest (/home/arvid/src/profiling/flamescope/node_modules/webpack/lib/util/createHash.js:80:21)
    at /home/arvid/src/profiling/flamescope/node_modules/webpack/lib/DefinePlugin.js:595:38
    at Hook.eval [as call] (eval at create (/home/arvid/src/profiling/flamescope/node_modules/tapable/lib/HookCodeFactory.js:19:10), <anonymous>:100:1)
    at Hook.CALL_DELEGATE [as _call] (/home/arvid/src/profiling/flamescope/node_modules/tapable/lib/Hook.js:14:14)
    at Compiler.newCompilation (/home/arvid/src/profiling/flamescope/node_modules/webpack/lib/Compiler.js:1053:26)
    at /home/arvid/src/profiling/flamescope/node_modules/webpack/lib/Compiler.js:1097:29
    at Hook.eval [as callAsync] (eval at create (/home/arvid/src/profiling/flamescope/node_modules/tapable/lib/HookCodeFactory.js:33:10), <anonymous>:6:1) {
  opensslErrorStack: [
    'error:03000086:digital envelope routines::initialization error',
    'error:0308010C:digital envelope routines::unsupported'
  ],
  library: 'digital envelope routines',
  reason: 'unsupported',
  code: 'ERR_OSSL_EVP_UNSUPPORTED'
}

Node.js v24.5.0

I'm not a js dev, so I have no idea what to do here.

Hi! So I was able to get this to work. The dependencies in particular are just very out of date. I had to delete package-lock.json (and make sure node_modules is also deleted), then regenerate it with an npm install. Then npm run webpack should work and uv run run.py or whatever tool you're using for venv should work.

Navigation Menu

Repository navigation

Nothing at this URL #169

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

Nothing at this URL #169

Description

Activity

duarten commented on Dec 16, 2022

zpget commented on Dec 21, 2022

zpget commented on Dec 21, 2022

Desislav-Petrov commented on Jan 28, 2023

akochepasov commented on Feb 15, 2023

JSoet commented on Sep 12, 2023

SinOverCos commented on Oct 18, 2023

JSoet commented on Oct 20, 2023

GoodDayGeorge commented on Oct 26, 2023

GoodDayGeorge commented on Oct 26, 2023

VorpalBlade commented on Aug 10, 2025

computerquip-work commented on Apr 27, 2026

Metadata

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

Issue actions